Cementing

Chemplex Product Data Book

Cement Additives

September 2011

* 325-573-7298 phone * 325-573-3340 fax* or * 3101 Industrial * Kilgore, TX 75662 *

* 903- 986-1119 phone * 903- 983-6675 fax * * P.O. Box 572 * 69 FM 576 West * Breckenridge, TX 76424* * 254-559-9030 phone * 254-559-9474 fax* Chemplex, Ltd. Return Policy Chemplex, Ltd. sells and blends chemicals for oilfield applications. The blends are exact specifications and supervised by trained blenders and tested by the on staff PhD Chemist. Many blends are job specific and may not be utilized in other applications. The liability is limited to the purchase price of the chemicals if the chemicals do not perform to the specifications outlined by Chemplex. The company accepts no liability for damages resulting from failure to perform due to contamination of chemical while in purchaser’s possession. The use of the chemical is beyond Chemplex control after delivery to the customer. Restock Charges:

1. 15% 30 days after purchase 2. 25% 60 days 3. 35% 90 days 4. 50% 180 days 5. Not accepted after 180 days

Thank You for your interest and use in Chemplex chemicals.

Cement Additives

C-11 – High Temperature Fluid Loss/Retarder C-12 – Moderate Temperature Fluid Loss C-15 – Low Temperature Non-Retarding Fluid Loss C-16A – Fluid Loss Additive C-18 – Wide Range Fluid Loss Additive C-18L – Wide Range Fluid Loss Additive C-20 – Lignosulfonate Retarder (< 200°F) C-20L – Lignosulfonate Retarder (< 200°F) C-24 – Lignosulfonate Retarder (>200°F) C-24L – Lignosulfonate Retarder (>200°F) C-26 – CMHEC-Based Retarder C-35 – Cement Disperssant C-37 – Conventional Disperssant/Friction Reducer C-37L – Conventional Disperssant/Friction Reducer C-41L – Defoamer C-41P – Defoamer C-42P – Defoamer C-43L – Thixotropic Agent C-43P – Thixotropic Agent C-44 – Bonding Improver, Expansive Additive C-45 – Accelerator/Suspending Agent

Cement Additives cont. C-47 – Gas Migration Agent C-51 – Suspension Additive C-53L – Surfactant for Diesel/Cement Slurries C-63 – Cement Spacer Mix Silica Flour – Strength Stabilizer Sodium Silicate Stop Loss Spacer Product – Loss Circulation Spacer Chemplex Plexcrete SFA – Silica Fume Alternative Chemplex Plexcrete STE – Compressive Strength Enhancer Plexaid Statfree – Antistatic Agent Plexfoam C-7 – Foamer for Cement MC-500 – Microfine Cement

Chemplex, Ltd.

Product Bulletin Oil well cements are called on to perform several functions under a wide range of conditions. The same cement crew may be called out for a surface pipe job at 60°F circulating temperature at 2:30 am and a squeeze at 310°F that same afternoon. Any single cement, alone, cannot possibly fill the requirements for both of these jobs. However, with the proper choice of additives to change the properties of cement slurries, one or at most two basic cements can be modified to do almost any oilfield job. Chemplex stocks a variety of the more commonly used types of additives and has the expertise to formulate and supply more specialized products as well. The following descriptions of the types of cement additives and the typical performance that can be expected from Chemplex’s additives are intended only as a guide for the user. A table of cross-references to functionally similar additives is included on page 5. We strongly advise laboratory testing of cement slurries prepared with anyone’s additives, particularly at higher temperatures. Various classes, brands, and even batches of oilwell cement can respond very differently to many additives, and so the test results reported for individual products will not necessarily be reproduced by any currently available cement. The additives normally in stock are listed below with their primary functions: Chemplex C-11 High Temperature fluid loss/retarder Chemplex C-12 Moderate temperature fluid loss Chemplex C-16A Low temperature, non-retarding fluid loss Chemplex C-18, C-18L Wide range fluid loss Chemplex C-20, C-20L Lignosulfonate retarder for below 220°F Chemplex C-24, C-24L Lignosulfonate retarder for 200°F and up Chemplex C-26 CMHEC-based retarder Chemplex C-35 Cement dispersant, salt-tolerant Chemplex C-37, C-37L Conventional dispersant/friction reducer Chemplex C-41L, C41P Defoamers Chemplex C-43P, C-43L Thixotropic agent Chemplex C-44 Bonding improver, expansive additive Chemplex C-45 Accelerator/suspending agent Chemplex C-47 Gas migration/fluid loss Chemplex C-51 Suspension Additive Chemplex C-53L Surfactant for diesel/cement slurries Chemplex C-63

Chemplex “C” Series Cement Additives

Product bulletins on each of these products are available from your Chemplex representative. The next few pages describe in general the functions of these types of products. Fluid Loss Additives Fluid loss additives are used in oilwell cement to reduce the amount of “filtrate” than can be squeezed out of the slurry under pressure. The standard lab test for fluid loss involves placing the slurry on a fine wire screen and applying 1000-psi nitrogen pressure for a 30-minute period. From the amount of water squeezed out, a calculation gives the “API Fluid Loss” in milliliters (mL). A slurry with no fluid loss control will usually have an API fluid loss of 1400 mL or more. For casing cementing, fluid loss values in the 100-200 mL range are often recommended, while for critical liners and some squeeze work, slurries with values of 50 mL or even lower have been used. Various fluid-loss additives work best in their own particular conditions. C-12 retards cement somewhat, and works best at moderate temperatures; C-11 is a fairly strong retarder and is not normally used much below a bottom-hole circulating temperature (BHCT) of 160°F. C-18 and C-18L are non-retarding at low temperatures and effective up to at least 300°F, but being synthetic copolymers are more expensive than the other additives. Retarders Retarders are used to lengthen the time a slurry remains pumpable, particularly at higher temperatures. As a consequence of this, they also of course delay strength development. Various retarders work best in different temperature ranges and slurry designs to give the optimum trade-off between enough pump time and “soon-enough” strength development. Chemplex offers three retarders (in addition to C-11 fluid loss additive, which can be used as a stand-alone retarder) to fit most situations. C-20 and C-24 are both based on lignosulfonates; these are proven performers, which tend to thin most slurries. C-20 is designed for use at BHCT’s up to about 210° or 220°F; above this temperature the loadings required become uneconomical. C-24 works best from about 200°F to 300°F or 325°F; below 200°F the difficulty in measuring the small loadings needed can give erratic behavior. Both C-20 and C-24 are also available in liquid form, indicated as C-20L and C-24L. If temperatures above the 300°-325°F range are encountered, the retarding action of C-24 can be intensified through the use Boric Acid, usually in a ratio of 3 parts C-24 to one part Boric Acid. Pilot testing of these slurries is necessary, as various cements have very different responses to the C-24 / Boric Acid mixture. With adequate lab design work, slurries may be designed for temperatures approaching 500°F.

Chemplex C-26 retarder is based on cellulose instead of lignosulfonate, and can be used to retard cements from BHCT’s of about 130° to 290°F. C-26 tends to thicken slurries, and is recommended if foamed or thixotropic cement must be retarded. Lignosulfonate retarders tend to destabilize foamed slurries, and interfere with

thixotropy. C-26 gives some fluid loss control to slurries. It is incompatible with calcium chloride, but may be used at low temperatures with (prehydrated!) C-45 to offset its retarding effects.

Dispersants/Friction Reducers Cement dispersants are used for their thinning effect on cement slurries, with two principal applications: lowering friction pressure of normal-weight slurries or preparing high-density cements that would normally be un-pumpably thick. Chemplex can supply either C-35, a very efficient, salt-tolerant product, or C-37, a conventional dispersant with no upper temperature limitations. Normal loadings of these are from about 0.3% to 1.0%, depending on cement characteristics, for thinning normal weight slurries. Dispersants are also used to mix heavyweight cements; Class H, for example, can be mixed at 18 lb/gal if either that density or the resulting very high strength is needed.

Excessive amounts of any dispersant can lead to over-thinning of slurries and excessive free water formation. When preparing densified slurries with dispersants, higher loadings of dispersant are frequently possible without excessive free water formation. Simple “coffee cup” tests can be run with particular cements to determine optimal loadings. Defoamers

Defoamers are almost always used in oil well cementing, not for any effect they have on the down hole properties of the slurry, but because they make mixing much easier. Because cement is usually blown to the mixer, it carries a lot of air with it. If this air gets trapped during mixing, it can make the slurry thicker, make your densometer read too light, and frequently can cause pumps to lose prime. A good defoamer will let air escape from the mix, minimizing these problems. Chemplex offers defoamers in either liquid or powder form. Liquid can be added to mix water or to the slurry at the point of mixing; some cementers use a garden sprayer to add C-41L as required. C-41P dry defoamer is normally dry-blended in cement. Thixotropic additives

Thixotropic cement is made in such a way that it mixes and pumps fairly easily, but gels up quickly if it is not flowing. This property can be very useful in situations where ordinary cement falls or washes away from where it is placed- for example, in squeezes of active water zones, or in plugs in open hole or in large casing. The “old reliable” thixotropic additive is gypsum at 10-to15% of cement. Gypsum works fairly well at low temperatures, but is hard to retard above about 140 degrees F, and can be tricky to mix due to its gelling in “dead spots” in the mixing equipment. Chemplex offers C-43 thixotropic agent, in either dry or liquid form, as an economical alternative to gypsum but with milder acceleration than gyp. These additives give you the option of running a thixotropic slurry on the spur of the moment, as they don’t need to be dry-blended like gypsum does.

Gas Migration and Bonding Additives

A variety of approaches have been used in the last 20 years or so to help with two sometimes related problems: gas flow in the annulus after cementing and poor bond logs. Research at major cementing companies has shown that two of the most important factors in getting a tight, leak-free cement job are good mud removal and good fluid-loss control. If the annulus is cleaned of mud residue, and if the cement doesn’t lose its water to the formation, the annulus will stay “full” of cement slurry and gas will have less opportunity to enter. Simply pumping an adequate volume of a turbulent-flow flush and controlling fluid loss to 100 mL or better will many times eliminate these problems.

Not all wells are cooperative, though. Some situations require more than just the

basics. Two additives that Chemplex furnishes can attack two faces of the gas flow/bonding problem. C-44 is an additive that causes cement to expand slightly as it sets. This expansion results in a better “grip” of the set cement on the pipe and formation, so that gas can’t find a flow path. C-47 additive changes the flow properties of the slurry, making it more liquid until it is actually on the point of setting. This property lets the slurry “drain” into pockets that might otherwise provide an entry point for gas. C-47 also has a highly efficient fluid-loss additive built in, so additional fluid loss control is not needed.

Chemplex Halliburton DS BJ Primary FunctionC-11 HALAD-14 D-60 FL-19 Fluid loss control, retarderC-12 HALAD-9 D-59 FL-10 Fluid loss control C-15 HALAD 322 D-127 FL-50 Fluid loss control, low temp.C-18 - D8 FL-32 Fluid lossC-18L HALAD 600LE+ D158 FL-32L Fluid lossC-20 HR-4 D-13 R-3 Low temp retarderC-20L HR 6L - - Low temp retarderC-24 HR-12 D-28 R-4 High temp retarderC-24 L HR 12L - - High temp retarderC-26 Diacel LWL D-8 R-6

R-9 Moderate temp retarder

Boric Acid Component R D-93 Retarder intensifierC-35 CFR-3 D65A CD33 Dispersant salt tolerantC-37 CFR-2 D-65 CD-31 DispersantC-37L CFR 2L DispersantC-41P D-Air D 46 FP 11 DefoamerC-41L, C42L D Air 2 D 47 FP 6L DefoamerC-43 Versa Set D-111 - Thixotropic agentC-43L Versa Set L - Thixotropic agentC-44 Suber CBL Self-Stress BA 29 Expansive agent-gas migrationC-45 Econolite D-79 A-2 ExtenderC-47 Gas Stop - - Gas migration/fluid lossC-51 FWCA - - Free water controlC-53L DOC 3 SOS Diesel Oil Cement Diesel slurriesC-63 Dual Spacer Mudpush MCS-2 Weighted preflush/spacerSodium Silicate FloCheck, Superflush D-75, Zonelock Sodium Silicate Lost circulation, preflush

Functional Equivalents for Cement Additives

This information relates only to the specific material designated and may not be valid for such material used in combination with any other materials or in any process. Such information is, the best of our knowledge and belief, accurate and reliable as of the date compiled. However, no representation, warranty or guarantee is made as to its accuracy, reliability or completeness. It is the user’s responsibility to satisfy himself as to the suitability and completeness of such information for his own particular use. We do not accept liability for any loss or damage that may occur from the use of this information nor do we offer any warranty against patent infringement.

Chemplex, Ltd. * P.O. Box 1071 * Snyder, TX 79550 * (325) 573-7298

Chemplex, Ltd.

Product Bulletin

GENERAL INFORMATION Chemplex C-11 is a fluid loss additive and retarder for use in the 140°-300°F temperature range. It is effective in all API classes of cement, and is compatible with salt up to 18% by weight of water. PHYSICAL PROPERTIES Specific gravity: 1.33 Absolute volume: 0.0903 gal/lb Appearance: Tan powder Solubility in water: complete CHEMICAL DESCRIPTION Chemplex C-11 contains cellulose derivatives and naphthalene sulfonate dispersants. LIMITATIONS Chemplex C-11 is not compatible with calcium chloride. Salt or Chemplex C-45 are effective accelerators for C-11 slurries.

RECOMMENDED USES Chemplex C-11 can be used in cement slurries at typical dosages of 0.2 to 1.5 pounds per sack of cement. It is effective in salt concentrations up to 18%. Though C-11 shows very good compatibility with most cement additives, laboratory testing is advised when running unfamiliar blends or brands of cement. Performance of Chemplex C-11 as a retarder in some example slurries is given in the table on the reverse of this page. Loadings of 0.5 lb/sk and above are typical where this product is used for its fluid loss control properties. PACKAGING Chemplex C-11 is supplied in 50-pound lined bags. AVAILABILITY Chemplex C11 is available from Chemplex, Ltd. at any of our stocking locations.

Updated 10-29-08

Chemplex C-11

Fluid Loss Additive


Chemplex, Ltd * P.O. Box 1071 * Snyder, TX 79550 * (325) 573-7298

Chemplex C-11 Class H, 4.3 gal. Fresh water/sk. 16.4 lb/gal, yield 1.06 cu.ft./sk. API Casing Schedules Approximate % C-11 Depth BHST (°F) BHCT (°F) Thickening Time 0.2 12000 260 172 2:15 0.3 12000 260 172 3:20 0.4 12000 260 172 5:00 0.3 14000 290 206 2:15 0.4 14000 290 206 3:00 0.6 14000 290 206 7:00 1.0 16000 320 247 2:00 1.4 16000 320 247 2:30 C-11 loadings of 0.4 to 0.5 typically will reduce fluid loss to 250 mL or below in 16.4 pound slurries. Add 30-60 minutes to thickening times for slurries mixed at 15.6 lb/gal (5.2 gal water).



Chemplex, Ltd.

Product Bulletin

GENERAL INFORMATION Chemplex C-12 is a fluid loss additive for use in the 100°-210°F temperature range. It is effective in all API classes of cement, and is compatible with salt up to 18% by weight of water. PHYSICAL PROPERTIES Specific gravity: 1.22 Absolute volume: 0.0984 gal/lb Appearance: Tan powder Solubility in water: complete CHEMICAL DESCRIPTION Chemplex C-12 contains cellulose derivatives and naphthalene sulfonate dispersants. LIMITATIONS Chemplex C-12 will significantly increase slurry viscosity when used at over about 0.5 lb/sack of cement; slurries may need to be blended slightly light to be readily mixable. C-12 is mildly retarding in most applications, and may excessively delay strength development in very cool wells.

RECOMMENDED USES Chemplex C-12 can be used in cement slurries at typical dosages of 0.4 to 1.5 pounds per sack of cement. It is effective in salt concentrations up to 18%. Though C-12 shows very good compatibility with most cement additives, laboratory testing is advised when running unfamiliar blends or brands of cement. A table giving some typical slurry properties possible with Chemplex C-12 is on the reverse of this page. PACKAGING Chemplex C-12 is supplied in 50-pound bags. It is not a DOT regulated material. AVAILABILITY Chemplex C12 is available from Chemplex, Ltd. at any of our stocking locations.

Updated 10-29-08

Chemplex C-12

Fluid Loss Additive



Chemplex C-12 in Class H Cement Class H cement, 4.3 gal/sk water, 1.06 cu ft/sk yield, 16.4 lb/gal density. Casing or liner Schedules Approximate % C-12 BHST (°F) BHCT (°F) Thickening Time 0.4 170 113 5:00 0.4 200 125 4:00 0.4 230 144 3:00 0.5 200 125 5:00 0.5 230 144 3:15 0.6 230 144 3:45 0.7 230 144 4:15 Squeeze Schedules

Approximate % C-12 BHST (°F) BHCT (°F) Thickening Time 0.4 170 136 3:00 0.6 200 159 3:30 0.6 230 186 2:00 0.8 230 186 2:45 All slurries listed should give >500 psi strength in 8 hours and >5000 psi in 24 hours at the BHST’s listed. Fluid loss values below 100mL/30 min. are typical for the slurries above with 0.5 to 0.6% C-12.



Chemplex, Ltd.

Product Bulletin

GENERAL INFORMATION Chemplex C-15 is a mildly retarding fluid loss additive for use at all temperatures below about 200°F. It thins, rather than thickens, typical slurries. PHYSICAL PROPERTIES Specific gravity: 1.30 Absolute volume: 0.0924 gal/lb Appearance: Reddish powder Solubility in water: Limited by viscosity CHEMICAL DESCRIPTION Chemplex C-15 is a proprietary blend of polymeric additives. LIMITATIONS Chemplex C-15 is a fairly strong dispersant in typical applications, and therefore should be used with caution in lightweight cements. Excessive free water can result from overdispersion of lighter slurries. C-15 should not be used in cement designs containing more than 18% salt.

RECOMMENDED USES Typical loadings of Chemplex C-15 are from 0.6% to 1.0% by weight of cement in normal density slurries, and up to about 1.5% in lightweight designs. The table on the reverse of this page gives some example slurries. PACKAGING Chemplex C-15 is supplied in 50 pound bags. It is not a DOT regulated material. AVAILABILITY Chemplex C-15 is available from Chemplex, Ltd. at any of our stocking locations.

Updated 10-29-08

Chemplex C-15

Fluid Loss Additive

Chemplex C-15 in Some Example Cement Slurries

Cement Density % C-15 Fluid Loss @ Temperature Class H, neat, 5.2 gal/sk fresh water 15.6 lb/gal 1.0 48 cc/30 min @ 114°F Class H, neat, 5.2 gal/sk fresh water 15.6 lb/gal 1.5 30 cc/30 min @ 114°F Class H, neat, 4.3 gal/sk fresh water 16.4 lb/gal 0.5 109 cc/30 min @ 114°F Class H, neat, 4.3 gal/sk fresh water 16.4 lb/gal 0.8 46 cc/30 min @ 114°F Class H, 18% salt, 4.3 gal/sk fresh water 16.7 lb/gal 1.0 89 cc/30 min @ 95°F Class A, neat, 5.2 gal/sk fresh water 15.6 lb/gal 0.8 181 cc/30 min @ 90°F Class A, neat, 5.2 gal/sk fresh water 15.6 lb/gal 1.0 84 cc/30 min @ 90°F Class A, 50:50 poz, 2% gel, 5.8 gal/sk fresh water 14.1 lb/gal 1.0 141 cc/30 min @ 114°F Class A, 50:50 poz, 2% gel, 5.8 gal/sk fresh water 14.1 lb/gal 1.5 52 cc/30 min @ 114°F Class C, 2% C-45, 8.7 gal/sk fresh water 13.5 lb/gal 1.5 465 cc/30 min @ 90°F



Chemplex, Ltd.

Product Bulletin

GENERAL INFORMATION Chemplex C-16A is a non-retarding fluid loss additive with particular application in lightweight slurries. It is highly effective at exceptionally low loadings – 0.5% or below – in many slurry designs. It can also be used at 1% to 2.5% loadings in “latex cement” designs. PHYSICAL PROPERTIES Specific gravity: 1.33 Absolute volume: 0.0903 gal/lb Appearance: Pale yellow powder Solubility in water: Limited by viscosity CHEMICAL DESCRIPTION Chemplex C-16A is a proprietary blend of an advanced dispersant with a polyvinyl alcohol (PVA). It is formulated with defoamer included to avoid the foaming problems sometimes seen with PVA products. LIMITATIONS Chemplex C-16A may lose some of its effectiveness in coarse-ground cements such as neat API Class H.

RECOMMENDED USES Typical loadings of Chemplex C-16A are from 0.5% to 0.8% by weight of cement in normal or lightweight slurries. Pozzolan appears to enhance the performance of this additive. The table on the reverse of this page gives some example slurries. Chemplex C-16A has almost no effect on slurry viscosity below about 140° F, and begins to thicken slurries slightly above that temperature. This property can aid in controlling free water, particularly in lighter designs. PACKAGING Chemplex C-16A is supplied in 50 pound bags. It is not a DOT regulated material. AVAILABILITY Chemplex C16A is available from Chemplex, Ltd. at any of our stocking locations.

Updated 10-29-08

Chemplex C-16A

Fluid Loss Additive



Fluid Loss Performance of C-16A C16A loading temperature API fluid loss Class C, neat, 14.8 lb/gal 0.50% 80 F 20 cc/30 min 0.75% 80 F 12 0.50% 100 F 16 0.50% 120 F 30 Class C, 50/50 poz, 2% bentonite, 14.2 lb/gal 0.50% 80 F 14 cc/30 min 0.50% 100 F 16 0.50% 120 F 32 Class A, neat, 15.6 lb/gal 0.50% 70 F 20 cc/30 min 0.50% 80 F 17 0.50% 100 F 34 0.50% 120 F 44 0.75% 140 F 64 Class H, neat, 15.6 lb/gal 0.75% 120 F 220 cc/30 min 1.00% 120 F 160 Class H, 50/50 poz, 2% bentonite, 14.2 lb/gal 0.50% 120 F 48 cc/30 min 0.75% 120 F 30 0.50% 140 F 92 0.75% 160 F 120 Updated 10-29-08



Chemplex, Ltd.

Product Bulletin

GENERAL INFORMATION Chemplex C-18 is a fluid loss additive with wide utility in the 70°-300°F temperature range. It is effective in all API classes of cement, and is compatible with salt up to saturation. PHYSICAL PROPERTIES Specific gravity: 1.7 Absolute volume: 0.0706 gal/lb Appearance: White powder Solubility in water: complete CHEMICAL DESCRIPTION Chemplex C-18 contains synthetic polymers in a spray-dried, free-flowing form. LIMITATIONS Chemplex C-18 is not compatible with calcium chloride. Salt, KCl, or Chemplex C-45 are effective accelerators for C-18 slurries.

RECOMMENDED USES Chemplex C-18 can be used in cement slurries at typical dosages of 0.3 to 1.6 pounds per sack of cement. It is effective in all salt concentrations. Loadings of C-37 dispersant as low as 0.3% typically enhances the fluid-loss performance of C-18. Though C-18 shows very good compatibility with most cement additives, laboratory testing is advised when running unfamiliar blends or brands of cement. PACKAGING Chemplex C-18 is supplied in 50-pound bags. It is not a DOT regulated material. AVAILABILITY Chemplex C18 is available from Chemplex, Ltd. at any of our stocking locations.

Updated 10-29-08

Chemplex C-18

Fluid Loss Additive



Chemplex, Ltd.

Product Bulletin

GENERAL INFORMATION Chemplex C-18L is a fluid loss additive with wide utility in the 140°-300°F temperature range. It is effective in all API classes of cement, and is compatible with salt up to saturation. PHYSICAL PROPERTIES Specific gravity: 1.12 Appearance: Viscous, pale liquid Bulk Density: 9.3 lb/gal Solubility in water: complete CHEMICAL DESCRIPTION Chemplex C-18L contains synthetic polymers in a non-flammable carrier. LIMITATIONS Chemplex C-18L is not compatible with calcium chloride. Salt or Chemplex C-45 are effective accelerators for C-18L slurries.

RECOMMENDED USES Chemplex C-18L can be used in cement slurries at typical dosages of 0.2 to 1.0 gallons per sack of cement. It is effective in all salt concentrations. Loadings of C-37 dispersant as low as 0.3% typically enhance the fluid-loss performance of C-18L. Though C-18L shows very good compatibility with most cement additives, laboratory testing is advised when running unfamiliar blends or brands of cement. Performance of Chemplex C-18L in some example slurries is given in the table below. PACKAGING CHEMPLEX C-18L IS SUPPLIED IN 55-GALLON DRUMS, 275-GALLON TOTES, OR IN BULK. IT IS NOT A DOT REGULATED MATERIAL. AVAILABILITY Chemplex C-18L is available from Chemplex, Ltd. at any of our stocking locations.

Updated 10-29-08

Chemplex C-18L Fluid Loss Additive

Fluid Loss with C18L in Some Class H Slurries

Slurry BHCT, ° F C18L Loading Fluid Loss, 1000 psi/30 min

16.2 lb/gal, 35% silica flour, 5.62 gal/sk 113° 0.38 gal/sk 173 ml water, yield 1.43 16.2 lb/gal: Class H, 35% silica flour, 0.5% C 37 113° 0.38 gal/sk 67 ml 5.62 gal/sk water, yield 1.43 16.2 lb/gal: Class H, 35% silica flour, 0.5% C37 206° 0.38 gal/sk 97 ml 0.4% C20, 5.62 gal/sk water, yield 1.43 16.2 lb/gal: Class H, 35% silica flour, 0.5% C37, 270° 0.56 gal/sk 61 ml 0.7% C24, 5.62 gal/sk water, yield 1.43 12.0 lb/gal: Class H, 3 lb/sk C-45, 113° 1.0 gal/sk 90 ml 14 gal/sk water, yield 2.35 16.1 lb/gal: Class H, saturated salt 144° 1.0 gal/sk 53 ml 5.2 gal/sk water, yield 1.28



Chemplex, Ltd.

Product Bulletin

GENERAL INFORMATION Chemplex C-20 is a lignosulfonate retarder for all classes of oilwell cement. It is designed for use in the 125°-220°F temperature range. PHYSICAL PROPERTIES Specific gravity: 1.54 Appearance: Dark brown powder Absolute volume: 0.0780 Bulk Density: 39-41 lb/cu.ft. Solubility in water: Soluble CHEMICAL DESCRIPTION Chemplex C-20 is a modified calcium lignosulfonate. LIMITATIONS Chemplex C-20 is recommended for use below circulating temperatures of about 220 degrees F. Above this temperature, a higher-range retarder such as Chemplex C-24 will typically be both more economical and more predictable.

RECOMMENDED USES Chemplex C-20 is typically used at levels of 0.2% to 1.0% by weight of cement in its normal temperature range. See the table on the reverse of this page for some example slurries. PACKAGING Chemplex C-20 is furnished in lined 50-pound bags. AVAILABILITY Chemplex C-20 is available from Chemplex, Ltd. at any of our stocking locations.

Updated 10-29-08

Chemplex C-20

Cement Retarder



C-20 Retarder Loading Chart

Approx Thickening Static Temp Circulating Temp C-20 Time

Depth °F °F Loading hr:min 8000 200 125 15 lb/100 sk 2:30

10000 230 144 25 lb/100 sk 3:00 12000 260 172 30 lb/100 sk 3:15 12000 260 172 40 lb/100 sk 4:30 14000 290 206 40 lb/100 sk 3:30 14000 290 206 50 lb/100 sk 4:30

These thickening times are based on historical data on various oilwell cements and are believed to be reliable. However, cement response to retarders can vary widely. Interactions with other additives can also be very unpredictable. Users of this data are therefore strongly cautioned to use good judgement in its use, and to obtain independent slurry testing particularly if working with cements or slurries whose retarder response is not well known.



Chemplex, Ltd.

Product Bulletin

GENERAL INFORMATION Chemplex C-20L is a liquid lignosulfonate retarder for all classes of oilwell cement. It is designed for use in the 125°-220°F temperature range. PHYSICAL PROPERTIES Flash point: Above 200 F Density: 9.58 lb/gal Appearance: Dark brown liquid Absolute volume: 0.104 gal/lb Solubility in water: Complete CHEMICAL DESCRIPTION Chemplex C-20L is a modified calcium lignosulfonate in an aqueous carrier. LIMITATIONS The use of Chemplex C-20L is recommended at circulating temperatures below about 220 degrees F. Above that point, a higher temperature retarder such as Chemplex C-24L will be both more economical and more predictable in behavior.

RECOMMENDED USES Chemplex C-20L is typically used at levels of 0.05 to 0.2 gallons per sack of cement in its normal temperature range. See the table on the reverse of this page for some example slurries. PACKAGING Chemplex C-20L is furnished in 5-gallon pails, 55-gallon poly drums, or in bulk. AVAILABILITY Chemplex C-20L is available from Chemplex, Ltd. at any of our stocking locations.

Updated 10-29-08

Chemplex C-20L

Cement Retarder



C-20L Retarder Loading Chart Approx Thickening Static Temp Circulating Temp C-20L Time

Depth °F °F Loading hr:min 8000 200 125 4.7 gal/100 sk 2:30

10000 230 144 7.9 gal/100 sk 3:00 12000 260 172 9.4 gal/100 sk 3:15 12000 260 172 12.6 gal/100 sk 4:30 14000 290 206 12.6 gal/100 sk 3:30 14000 290 206 15.7 gal/100 sk 4:30




Chemplex, Ltd.

Product Bulletin

GENERAL INFORMATION Chemplex C-24 is a lignosulfonate retarder for all classes of oilwell cement. It is designed for use in the 200°-320°F temperature range. PHYSICAL PROPERTIES Specific gravity: 1.54 Appearance: Dark brown powder Absolute volume: 0.0780 Bulk Density: 39-41 lb/cu.ft. Solubility in water: Soluble CHEMICAL DESCRIPTION Chemplex C-24 is a modified sodium lignosulfonate. LIMITATIONS As with any high-temperature lignosulfonate retarder, care should be exercised in using Chemplex C-24 at or below 200°F slurry temperature, as over-retardation is possible with these materials. Laboratory testing is strongly suggested for any use of high-temperature retarders, particularly in unfamiliar cements or slurry designs.

RECOMMENDED USES Chemplex C-24 is typically used at levels of 0.3% to 2.0% by weight of cement in its normal temperature range. See the table on the reverse of this page for some example slurries. Its action may be intensified to give performance at over 400 degrees if required through the addition of borates or of certain organic acids; laboratory testing is mandatory for such applications. PACKAGING Chemplex C-24 is furnished in lined 50-pound bags. AVAILABILITY Chemplex C-24 is available from Chemplex, Ltd. at any of our stocking locations.

Updated 10-29-08

Chemplex C-24

Cement Retarder



Chemplex C-24 Retarder Loading Chart Approximate thickening times for Class H, 35% silica flour, 16.0 lb/gal slurry, 5.9 gal/sk fresh water

C-24 Loading C-24 Loading Static Temp Circulating Temp Approx. Approx.

Depth °F °F 3 hr 4 hr 12000 260 197 30 lb/100 sk 40 lb/100 sk 14000 290 233 40 lb/100 sk 50 lb/100 sk 16000 320 270 70 lb/100 sk 90 lb/100 sk 18000 350 308 100 lb/100 sk 120 lb/100 sk




Chemplex, Ltd.

Product Bulletin

GENERAL INFORMATION Chemplex C-24L is a liquid lignosulfonate retarder for all classes of oilwell cement. It is designed for use in the 200°-320°F temperature range. PHYSICAL PROPERTIES Flash point: Above 200 F Density: 9.58 lb/gal Appearance: Dark brown liquid Absolute volume: 0.104 gal/lb Solubility in water: Complete CHEMICAL DESCRIPTION Chemplex C-24L is a modified sodium lignosulfonate in an aqueous carrier. LIMITATIONS As with any high-temperature lignosulfonate retarder, care should be exercised in using Chemplex C-24L at or below 200°F slurry temperature, as over-retardation is possible with these materials. Laboratory testing is strongly suggested for any use of high-temperature retarders, particularly in unfamiliar cements or slurry designs.

RECOMMENDED USES Chemplex C-24L is typically used at levels of 0.1 to 0.5 gallons per sack of cement in its normal temperature range. See the table on the reverse of this page for some example slurries. Its action may be intensified to give performance at over 400 degrees if required through the addition of borates or of certain organic acids; laboratory testing is mandatory for such applications. PACKAGING Chemplex C-24L is furnished in 5-gallon pails, 55-gallon poly drums, or in bulk. AVAILABILITY Chemplex C-24L is available from Chemplex, Ltd. at any of our stocking locations.

Updated 10-29-08

Chemplex C-24L

Cement Retarder



Chemplex C-24L Retarder Loading Chart Approximate thickening times for Class H, 35% silica flour, 16.0 lb/gal slurry, 5.9 gal/sk fresh water

C-24L Loading C-24L Loading Static Temp Circulating Temp Approx. Approx.

Depth °F °F 3 hr 4 hr 12000 260 197 9.4 gal/100 sk 12.6 gal/100 sk 14000 290 233 12.6 gal/100 sk 15.7 gal/100 sk 16000 320 270 22.0 gal/100 sk 28.3 gal/100 sk 18000 350 308 31.5 gal/100 sk 37.7 gal/100 sk




Chemplex, Ltd.

Product Bulletin

GENERAL INFORMATION Chemplex C-26 is a cellulose-based cement retarder for use in the 130°-260°F temperature range. It is effective in all API classes of cement, and is compatible with salt up to 18% by weight of water. C-26 is particularly useful where lignosulfonate retarders are counter indicated, for instance, in foamed or thixotropic cements. PHYSICAL PROPERTIES Specific gravity: 1.36 Absolute volume: 0.0880 gal/lb Appearance: Yellowish powder Solubility in water: Limited by viscosity CHEMICAL DESCRIPTION Chemplex C-26 is a selected grade of CMHEC, or carboxymethylhydroxyethylcellulose. LIMITATIONS Chemplex C-26 will significantly increase slurry viscosity when used at over about 0.5 lb/sack of cement; slurries may need to be blended slightly light to be readily mixable. C-26 is incompatible with calcium chloride.

RECOMMENDED USES Chemplex C-26 can be used in cement slurries at typical dosages of 0.1 to 1.5 pounds per sack of cement. It is effective in salt concentrations up to 18%. Though C-26 shows very good compatibility with most cement additives, laboratory testing is advised when running unfamiliar blends or brands of cement. A table giving some typical slurry properties possible with Chemplex C-26 is on the reverse of this page. C-26 is also useful as a high-temperature fluid-loss additive, particularly when combined with C-37 or C-35 dispersant. PACKAGING Chemplex C-26 is supplied in 50-pound bags. It is not a DOT regulated material. AVAILABILITY Chemplex C-26 is available from Chemplex, Ltd. at any of our stocking locations.

Updated 10-29-08

Chemplex C-26

Cement Retarder



Example of Chemplex C-26 slurries: Class H, 35% silica flour, 5.9 gal/sk water, 1.47 cu.ft./sk yield, 16.0 lb/gal density.

Approximate Lb/sack C-26 BHST (°F) BHCT (°F) Thickening Time 0.1 230 167 3:30 0.2 260 197 3:30 0.4 290 233 2:30 0.6 290 233 3:30



Chemplex, Ltd.

Product Bulletin

GENERAL INFORMATION Chemplex C-35 is a versatile dispersant/friction reducer for all oilwell cements. It is effective at salt concentrations from zero to saturation and at temperatures from 100° to 400° F. PHYSICAL PROPERTIES Specific gravity: 1.85 Appearance: dark red powder Absolute volume: 0.0649 gal/lb Bulk Density: 36-40 lb/cu.ft. Solubility in Water: Soluble CHEMICAL DESCRIPTION Chemplex C-35 is a complex copolymer containing no napthalene sulfonates. It is strongly anionic in nature. LIMITATIONS As with any dispersant, care should be taken in slurry design with Chemplex C-35 to avoid excessive dosages. Excess dispersant can cause settling of slurries and excessive free water.

RECOMMENDED USES Chemplex C-35 can be used at loadings from 0.25 to 0.75 pound per sack of cement, depending on slurry density, type of cement, and presence of other additives. Laboratory testing is strongly recommended when first using Chemplex C-35 with a particular cement or additive package. Chemplex C-35 is mildly retarding in most applications.

PACKAGING Chemplex C-35 is furnished in 50-pound bags. AVAILABILITY Chemplex C-35 is available from Chemplex, Ltd. at any of our stocking locations.

Updated 10-29-08

Chemplex C-35 Cement Dispersant



Chemplex, Ltd.

Product Bulletin

GENERAL INFORMATION Chemplex C-37 is a dispersant/friction reducer for all oilwell cements. It is effective at salt concentrations from zero to 18% by weight of water and at temperatures from 70° to 400° F. PHYSICAL PROPERTIES Specific gravity: 1.30 Appearance: Tan powder Absolute volume: 0.0923 gal/lb Bulk Density: 40-45 lb/cu.ft. Solubility in Water: Soluble CHEMICAL DESCRIPTION Chemplex C-37 is a napthalene sulfonate copolymer. It is strongly anionic in nature. LIMITATIONS As with any dispersant, care should be taken in slurry design with Chemplex C-37 to avoid excessive dosages. Excess dispersant can cause settling of slurries and excessive free water.

RECOMMENDED USES Chemplex C-37 can be used at loadings from 0.40 to 1.0 pound per sack of cement, depending on slurry density, type of cement, and presence of other additives. Laboratory testing is strongly recommended when first using Chemplex C-37 with a particular cement or additive package. Chemplex C-37 is mildly retarding in most applications, particularly below 100 degrees F. A table with some suggested guidelines for mixing densified slurries with C-37 is on the reverse of this page.


Updated 10-29-08

Chemplex C-37

Cement Dispersant



C-37 Dispersant Loading Chart

Slurry Weight Gal/sk water lb/sack C-37 or Gal/sack C-37L 17.0 lb/gal 3.8 gal 0.5 lb 0.16 gal 17.5 lb/gal 3.4 gal 0.7 lb 0.22 gal 18.0 lb/gal 3.0 gal 1.0 lb 0.33 gal



Chemplex, Ltd.

Product Bulletin

GENERAL INFORMATION Chemplex C-37L is a liquid dispersant/friction reducer for all oilwell cements. It is effective at salt concentrations from zero to 18% by weight of water and at temperatures from 70° to 400° F. PHYSICAL PROPERTIES Appearance: Brown liquid Absolute volume: 0.102 gal/lb Density: 9.8 lb/gal Solubility in Water: Soluble Flash point: None CHEMICAL DESCRIPTION Chemplex C-37L is a naphthalene sulfonate copolymer dissolved in an aqueous carrier. It is strongly anionic in nature. LIMITATIONS As with any dispersant, care should be taken in slurry design with Chemplex C-37L to avoid excessive dosages. Excess dispersant can cause settling of slurries and excessive free water.

RECOMMENDED USES Chemplex C-37L can be used at loadings from 0.12 to 0.45 gallon per sack of cement, depending on slurry density, type of cement, and presence of other additives. Laboratory testing is strongly recommended when first using Chemplex C-37L with a particular cement or additive package. Chemplex C-37L is mildly retarding in most applications, particularly below 100 degrees F. A table with some suggested guidelines for mixing densified slurries with C-37L is on the reverse of this page.

PACKAGING Chemplex C-37L is furnished in 5 gallon pails, 55 gallon poly drums, or in bulk. It is not a DOT regulated material. AVAILABILITY Chemplex C-37L is available from Chemplex, Ltd. at any of our stocking locations.

Updated 10-29-08

Chemplex C-37L

Cement Dispersant



Chemplex, Ltd.

Product Bulletin

GENERAL INFORMATION Chemplex C-41L is a liquid defoamer for all types of oil well cement.

PHYSICAL PROPERTIES Appearance: Clear, colorless liquid Absolute volume: 0.139 gal/lb Density: 7.2 lb/gal Solubility in Water: Partial Flash point: 54 deg F CHEMICAL DESCRIPTION Chemplex C-41L contains an organic defoamer in an alcohol-based carrier. LIMITATIONS None known.

RECOMMENDED USES Chemplex C-41L is normally used at dosages of 0.1 to 1.0 gallons for every 10 barrels of mix water. It should be added as near the point of foam generation as possible, as it will tend to float on mix water if not well agitated. A garden bug sprayer makes an excellent way to add the small amounts of C-41L needed directly to the mixer.

PACKAGING Chemplex C-41L is furnished in 5-gallon pails and 55-gallon poly drums. The US DOT classifies it as a Flammable Liquid, nos., (Contains methyl alcohol), 3, UN 1993, PG II. AVAILABILITY Chemplex C-41L is available from Chemplex, Ltd. at any of our stocking locations.

Updated 10-29-08

Chemplex C-41L

Cement Defoamer



Chemplex, Ltd.

Product Bulletin

GENERAL INFORMATION Chemplex C-41P is a powdered defoamer for all types of oil well cement.

PHYSICAL PROPERTIES Specific gravity: 2.7 Appearance: White powder Absolute volume: 0.0444 gal/lb Bulk Density: 60 lb/cu.ft. Solubility in Water: Insoluble CHEMICAL DESCRIPTION Chemplex C-41P contains silicone-based defoamers on an inert, inorganic carrier. LIMITATIONS None known.

RECOMMENDED USES Chemplex C-41P is normally effective at loadings of 0.1 to 0.25 pounds per sack of cement. The higher loadings as usually needed only in very foamy slurries, such as high-bentonite or high-salt designs. C-41P is normally dry-blended into the cement.

PACKAGING Chemplex C-41P is furnished in 50-pound bags. AVAILABILITY Chemplex C-41P is available from Chemplex, Ltd. at any of our stocking locations.

Updated 10-29-08

Chemplex C-41P

Cement Defoamer



Chemplex, Ltd.

Product Bulletin

GENERAL INFORMATION Chemplex C-42P is a powdered defoamer for all types of oil well cement.

PHYSICAL PROPERTIES Specific gravity: 2.7 Appearance: White powder Absolute volume: 0.0444 gal/lb Bulk Density: 60 lb/cu.ft. Solubility in Water: Insoluble CHEMICAL DESCRIPTION Chemplex C-42P contains phosphate-based defoamers on an inert, inorganic carrier. LIMITATIONS None known.

RECOMMENDED USES Chemplex C-42P is normally effective at loadings of 0.1 to 0.25 pounds per sack of cement. The higher loadings as usually needed only in very foamy slurries, such as high-bentonite or high-salt designs. C-42P is normally dry-blended into the cement.

PACKAGING Chemplex C-42P is furnished in 50-pound bags. The product may be irritating to the skin or if dust is inhaled. Read the MSDS before use and wear proper PPE. AVAILABILITY Chemplex C-42P is available from Chemplex, Ltd. at any of our stocking locations.

Updated 8-10-09

Chemplex C-42P

Cement Defoamer



Chemplex, Ltd.

Product Bulletin

GENERAL INFORMATION Chemplex C-43L is a thixotropic additive for all types of oil well cement. It offers an economical alternative, in an economical liquid form, to gypsum in this application.

PHYSICAL PROPERTIES Appearance: Clear liquid Absolute volume: 0.0817 gal/lb Density: 12.2 lb/gallon. Solubility in Water: Soluble Flash point: None CHEMICAL DESCRIPTION Chemplex C-43L is a 38% solution of Chemplex C-43 in water. This is equivalent to 4.5 lb dry C-43 per gallon.

LIMITATIONS Chemplex C-43L is a moderately strong accelerator for cement and may require the use of retarders at circulating temperatures over 100 degrees F. The use of dispersants in C-43L slurries may reduce the thixotropy of the cement, and should be avoided.

RECOMMENDED USES Chemplex C-43L is normally effective at loadings of 0.15 to 0.35 gallons per sack of cement. The table on the back of this page shows some example slurry designs.

PACKAGING Chemplex C-43L is furnished in 55-gallon poly drums. The US DOT classifies it as Corrosive liquid, nos. AVAILABILITY Chemplex C-43L is available from Chemplex, Ltd. at any of our stocking locations.

Updated 10-29-08

Chemplex C-43L

Thixotropic Agent



C-43L in Class H Cement Slurries 4.9 gal/sk fresh water, 15.7 lb/gal, yield 1.17 Static Circulating Approximate Temperature Temperature gal/sk C-43L lb/sk C-26 Thickening Time 110°F 91°F 0.15 0.00 2:45 140°F 103°F 0.20 0.05 2:45 170°F 113°F 0.22 0.08 4:00 7.55 gal/sk, 14.0 lb/gal, yield 1.51 200°F 140°F 0.17 0.15 2:45 230°F 167°F 0.33 0.20 3:15



Chemplex, Ltd.

Product Bulletin

GENERAL INFORMATION Chemplex C-43P is a powdered thixotropic additive for all types of oil well cement. It offers an economical alternative to gypsum in this application.

PHYSICAL PROPERTIES Specific gravity: 2.3 Appearance: White powder Absolute volume: 0.0522 gal/lb Bulk Density: 52 lb/cu.ft. Solubility in Water: Soluble CHEMICAL DESCRIPTION Chemplex C-43P is a highly alkaline blend of inorganic salts.

LIMITATIONS Chemplex C-43P is a moderately strong accelerator for cement and may require the use of retarders at circulating temperatures over 100 degrees F. The use of dispersants in C-43 slurries may reduce the thixotropy of the cement, and should be avoided.

RECOMMENDED USES Chemplex C-43P is normally effective at loadings of 0.7 to 1.5 pounds per sack of cement. The table below shows some example slurry designs.

PACKAGING Chemplex C-43P is furnished in 55-pound plastic bags. Opened bags should be tightly closed to prevent caking of product. AVAILABILITY Chemplex C-43P is available from Chemplex, Ltd. at any of our stocking locations.

Updated 10-29-08

Chemplex C-43P

Thixotropic Agent



C-43P in Class H Cement Slurries 5.0 gal/sk fresh water, 15.7 lb/gal, yield 1.17 Static Circulating Approximate Temperature Temperature lb/sk C-43P lb/sk C-11 Thickening Time 110°F 91°F 0.7 0.00 2:45 140°F 103°F 0.9 1.10 2:45 170°F 113°F 1.0 0.15 4:00 7.7 gal/sk, 14.0 lb/gal, yield 1.51 200°F 140°F 0.75 0.30 2:45 230°F 167°F 1.50 0.40 3:15



Chemplex, Ltd.

Product Bulletin

GENERAL INFORMATION Chemplex C-44 is a powdered additive, which provides expansion during set for all types of oil well cement. It can be used both to improve cement bond to pipe and to combat gas migration.

PHYSICAL PROPERTIES Specific gravity: 4.5 Appearance: Grey, heavy powder Absolute volume: 0.0267 gal/lb Bulk Density: 88 lb/cu.ft. Solubility in Water: Insoluble CHEMICAL DESCRIPTION Chemplex C-44 is a finely powdered reactive metal blended with a reaction-moderating inorganic salt.

LIMITATIONS Chemplex C-44 functions by generating highly flammable hydrogen gas as the cement slurry sets. Caution should be taken to keep sources of ignition away when mixing, placing, or drilling out C-44 slurries.

Some cements and pozzolans with higher-than-average alkali content will react fairly rapidly with C-44, causing early expansion. This is often only a problem in cup samples, which will “puff up” and set poorly. DO NOT attempt to catch samples in a sealed container, as enough pressure may develop to burst the container.

RECOMMENDED USES Chemplex C-44 is normally effective at loadings of 0.4 to 1.5 pounds per sack of cement. Higher loadings are normally used for deeper wells, as more gas must be generated under higher hydrostatic pressure to give proper expansion.

PACKAGING Chemplex C-44 is furnished in 50-pound lined boxes. Opened containers should be tightly closed to preserve integrity of product. AVAILABILITY Chemplex C-44 is available from Chemplex, Ltd. at any of our stocking locations.

Updated 10-29-08

Chemplex C-44

Expansive Agent



Chemplex, Ltd.

Product Bulletin

GENERAL INFORMATION Chemplex C-45 is a suspension aid for preparing lightweight slurries from all types of oil well cement. It may also be used as an accelerator.

PHYSICAL PROPERTIES Specific gravity: 2.4 Appearance: White granules Absolute volume: 0.0499 gal/lb Bulk Density: 70 lb/cu.ft. Solubility in Water: Soluble CHEMICAL DESCRIPTION Chemplex C-45 contains alkali silicates. LIMITATIONS Chemplex C-45 is an accelerator, and slurries using it may be difficult to retard at temperatures above about 140 degrees unless special attention is given to slurry design.

RECOMMENDED USES Chemplex C-45 is normally effective at loadings of 1 to 3 pounds per sack of cement. A table with suggested loadings for several lightweight designs is on the back of this page. C-45 is normally dry-blended into the cement, but may be prehydrated IF a portion of the cement is mixed into the water BEFORE the C-45 is added. If the C-45 is added first, it will not provide good suspension. C-45 can be used as an accelerator for cements containing C-11 or other retarding additives by taking advantage of this; prehydrating C-45 in clean mix water will allow slurries to be mixed at or near normal density.


Updated 10-29-08

Chemplex C-45

Suspension Aid



C-45 in some typical West Texas cements 72 Hour Cement gal/sk Slurry Yield Strength Free Water Class Water Density lb/gal cu.ft./sk lb/sk C-45 80°F psi percent H 8.0 13.8 1.55 1.0 1180 0 H 10.0 13.0 1.81 1.5 840 0 H 12.0 12.4 2.07 2.0 620 0 H 17.5 11.4 2.81 3.0 160 0.3 A 7.9 13.9 1.53 1.0 1640 0 A 10.0 13.0 1.81 1.5 1210 0 A 12.4 12.3 2.14 2.0 930 0.2 A 17.5 11.4 2.81 3.0 315 0.4 Class C mixed according to the schedule for Class A above will give considerably better strength. Also, addition of salt at 5 lb/sack to any of the above slurries will give faster strength development. The use of calcium chloride with C-45 offers no real advantage in quickness of set, and so is not recommended.



Chemplex, Ltd.

Product Bulletin

GENERAL INFORMATION Chemplex C-47 is a powdered additive which provides control of gas migration after cementing through two mechanisms: fluid loss control and increased cement fluidity.

PHYSICAL PROP ERTIES Specific gravity: 1.53 Appearance: Reddish powder Absolute volume: 0.0782 gal/lb Solubility in water: Complete

CHEMICAL DESCRIPTION Chemplex C-47 is a blend of synthetic polymers with dispersing and fluid-loss control properties.

LIMITATIONS Chemplex C-47 should not be used in slurries with over 18% salt, or with over 0.5% Chemplex C-24. .

RECOMMENDED USES Chemplex C-47 is normally effective at loadings of 0.4 to 1.5 pounds per sack of cement. Loadings of 1.0 lb/sk typically give fluid loss values below 60cc/30 min in normal-weight slurries. C-47 is mildly retarding in most situations.

PACKAGING Chemplex C-47 is furnished in 25-pound lined bags. Opened containers should be tightly closed to preserve integrity of product. AVAILABILITY Chemplex C-47 is available from Chemplex, Ltd. at any of our stocking locations.

Updated 10-29-08

Chemplex C-47

Gas Migration Agent



Chemplex, Ltd.

Product Bulletin

GENERAL INFORMATION Chemplex C-51 is a polymeric additive designed to help control free water and to suspend solids in cement slurries, particularly at higher temperatures where metasilicate products are difficult to retard. C-51 also gives some fluid loss control in most applications. PHYSICAL PROPERTIES Specific gravity: 1.40 Absolute volume: .0857 gal/lb Appearance: Off white powder Solubility in water: Limited by viscosity CHEMICAL DESCRIPTION Chemplex C-51 contains high molecular weight cellulose derivatives formulated to give rapid viscosity development in cement slurries. LIMITATIONS Chemplex C-51 is a moderately strong retarder at temperatures below 140°F or so; slurries below

this temperature may be simpler to design with an alternate product such as Chemplex C-45.

RECOMMENDED USES Chemplex C-51 should be dry-blended into cement at loadings ranging from 0.2 to 1.0% by weight of cement. Loadings near the top of this range can be used in slurries as light as 12.5 lb/gallon. C-51 is compatible with most, if not all, common cement additives and with all classes of oil well cement. A few example slurries are given in the table on the back of this bulletin. PACKAGING Chemplex C-51 is supplied in 50-pound bags. AVAILABILITY Chemplex C-51 is available from Chemplex, Ltd. at any of our stocking locations.

Updated 10-29-08

Chemplex C-51

Suspension Additive

C-51 Suspending Agent - Example Slurries

12.5 lb/gal 11.5 gal/sk 0.9% 0% 220 psi

13.0 lb/gal 10 gal/sk 0.5% 0.2% 890 psi

13.4 lb/gal 8.9 gal/sk 0.3% 0% 1020 psi

All had fluid loss below 200 cc/ 30 minutes at 140° F.

24-Hour Strength 190°

Class H Cement

Slurry Density

Mix Water C-51 Loading Free Water



Chemplex, Ltd.

Product Bulletin

GENERAL INFORMATION Chemplex C-53L is a surfactant designed to allow mixing of cement slurries in diesel oil. These slurries will not set until contacted by water, and so can be used in a variety of remedial work in oil and gas wells. PHYSICAL PROPERTIES Density: 7.6 lb/gallon Appearance: dark brown liquid Flash Point: 57 deg F Solubility in Water: Dispersible Solubility in diesel: Complete CHEMICAL DESCRIPTION Chemplex C-53L is a strongly cationic, oil-soluble surfactant/dispersant in an alcohol base. LIMITATIONS Chemplex C-53L is designed to be used in cement slurries made with dry diesel or kerosene. It should not be used with slurries containing either bentonite (gel) or pozzolan.

RECOMMENDED USES Chemplex C-53L is normally added to dry diesel oil or kerosene at a loading of 1.0 gallon per hundred gallons of oil. This mixture is then used to prepare a cement slurry, most typically at 5.0 or 6.0 gallons per sack of cement. These two mixing ratios give a 15.1 lb/gal slurry at a yield of 1.15 cu.ft./sk and 14.3 lb/gal and 1.28 cu.ft./sk, respectively.

This type of slurry can then be used to squeeze a wet zone or hole in pipe, regardless of depth. As the slurry contains no water, it will not set until it contacts some. Once contact with water occurs, the C-53L helps draw water into the slurry. This results in an immediate thickening to a pasty consistency, followed by the cement setting. A 24-hour WOC time is normally advised to insure that enough water absorbs into the slurry to give good strength development. A suggested placement procedure for diesel/cement slurries is to pump 3 to 5 barrels of dry diesel through the mixer and down the well to remove any water; mixing will be VERY difficult if the slurry is contaminated with water. Then mix and pump the slurry, displacing with diesel or clean crude oil. Unset, undisplaced slurry can be reversed out. The only additives that are really useful in diesel/cement slurries are calcium chloride at 1 to 2% or gypsum at 10 to 25%. These can give quicker strength development. Retarders, etc., serve no real purpose in diesel, as no set is possible until water is encountered anyway.

PACKAGING Chemplex C-53L is supplied in 5-gallon pails or 55-gallon drums. It is regulated by the US DOT as a Flammable liquid, nos. AVAILABILITY Chemplex C-53L is available from Chemplex, Ltd. at any of our stocking locations.

Updated 10-29-08

Chemplex C-53L Diesel Cement Additive



Chemplex, Ltd.

Product Bulletin

GENERAL INFORMATION Chemplex C-63 is a prepackaged mix to prepare cement spacers with densities from 9 lb/gal to as high as 18 lb/gal. It is normally mixed into fresh or salt water at the ratio of one 50-lb sack per barrel of finished spacer, with readily available weighting agents being used to achieve the desired density. The resulting fluid are fairly low in viscosity, stable to at least 300º F, and can be modified with surfactants to give good performance in displacing oil-based muds. PHYSICAL PROPERTIES Specific gravity: 2.24 Absolute volume: 0.0536 gal/lb Appearance: light tan powder Odor: none

SUGGESTED APPLICATIONS The attached charts give guidelines on mixing procedures for C-63. The product should always be added to water with good agitation, and mixed for at least five minutes to allow for full hydration before adding the weighting material.

CHEMICAL PROPERTIES Chemplex C-63 contains suspension aids and a defoamer in a graded calcium carbonate base. The product does not contain silica flour or other crystalline silica at above trade levels.

AVAILABILITY Chemplex C-63 is packaged in 50-pound lined paper sacks and is available from Chemplex, Ltd. at any of our stocking locations.

Updated 10-29-08

Chemplex C-63

Cement Spacer Mix



C-63 Densities Using Silica Flour (or Graded Calcium Carbonate)

To make one barrel spacer. Desired Density bbl Water lb C-63 lb Silica Flour 9 lb/gal 0.936 50 0 10 lb/gal 0.858 50 72 11 lb/gal 0.781 50 143 12 lb/gal 0.704 50 214 13 lb/gal 0.626 50 285 *calcium carbonate will give very slightly higher densities.

C-63 Densities using Barite Desired Density bbl Water lb C-63 lb Barite 11 lb/gal 0.859 50 114 12 lb/gal 0.821 50 170 13 lb/gal 0.783 50 226 14 lb/gal 0.745 50 282 15 lb/gal 0.707 50 339 16 lb/gal 0.669 50 395 17 lb/gal 0.631 50 452 18 lb/gal 0.593 50 508



Chemplex, Ltd.

Product Bulletin

GENERAL INFORMATION Silica Flour is used in oilwell cement whenever the cement will be exposed to temperatures of 230⁰F or higher. It prevents the loss of strength, or retrogression, that oilwell cement would otherwise experience at these temperatures.

PHYSICAL PROPERTIES Specific gravity: 2.63 Appearance: White powder Absolute volume: 0.0456 gal/lb Bulk Density: 70 lb/cu.ft. Solubility in Water: Insoluble CHEMICAL DESCRIPTION Silica Flour is finely ground silica sand. LIMITATIONS None known.

RECOMMENDED USES Silica Flour is typically added at 35% by weight of cement for slurries to be used from 230⁰F to 450⁰F. Normal water requirement is 40% by weight of silica flour (or 1.58 gal/sack at this 35% loading).

PACKAGING Silica Flour is furnished in 50 pound bags. AVAILABILITY Silica Flour is available from Chemplex, Ltd. at any of our stocking locations.

Updated 5-14-09

Silica Flour

Strength Stabilizer

Chemplex, Ltd.

Product Bulletin

GENERAL INFORMATION Sodium Silicate is a highly cost-effective chemical for a variety of oilwell uses where cement alone is not quite the right answer. Sodium silicate has a long history of successful field application in:

• Improving cement-to-pipe and cement-to-formation bonding. • Stopping lost circulation • sealing casing leaks. • Shutting off bottom water or thief zones.

This bulletin will outline some suggested uses for this versatile product; contact Chemplex or your service company representative for specifics on particular applications

PHYSICAL PROPERTIES Density: 11.7 lb./gal Solubility in water: Soluble Solubility in diesel: Insoluble Appearance: Clear to hazy viscous

liquid Odor: None pH: around 11 Flash point: 30-35° F

CHEMICAL DESCRIPTION Sodium silicate is furnished as a 40% active solution containing sodium polysilicates in water. It is highly reactive with cement slurries, acids, or salts, particularly calcium or magnesium salts. Sodium silicate should be protected from freezing, as it will occasionally separate and become unusable if frozen and then thawed.

LIMITATIONS There are no particular temperature limitations on the use of sodium silicate in properly designed applications. Unintentional mixing of

sodium silicate with incompatible materials will cause a variety of major headaches; the procedures below point out ways to avoid these problems. Fresh water must always be used to separate sodium silicate from incompatible materials during placement.

RECOMMENDED USES A. As a cement preflush

Sodium silicate is frequently used as a preflush ahead of primary cement jobs. It can improve cement bonding and aid in preventing cement “fallback” in many areas. A typical procedure where lost circulation is not a major concern is as follows:

1. Pump at least 10 barrels of fresh water, diesel, or other compatible

spacer 2. Pump a solution of one part sodium

silicate dissolved in four parts fresh water. Best mud displacement and boding are normally seen when the volume of this mixture is enough to give at least 5 minutes contact time with the formation during placement; for instance, if you mix and displace cement at 6BPM, use 30 barrels of this silicate solution

3. Pump a fresh water spacer large enough to give at least 125 feet of fill downhole. Always use at least 3-5 barrels of fresh water to avoid leaving solids in pumps, lines, or pipe.

4. Pump at least 10 barrels of fresh water, diesel, or other compatible

spacer B. For lost circulation

Sodium silicate’s high reactivity with calcium in brines is used to build a barrier of “petrified cottage cheese” in lost circulation zones. If formation

Sodium Silicate

fluids are not very salty, with high calcium content, it is strongly recommended that calcium chloride brine preflush, as outlined below, be used. 1. . Pump at least 20 bbl of a 10%

calcium chloride solution (35 lb dry calcium chloride per barrel of fresh or field salt water) to the loss zone.

2. Pump a spacer of 3 to 5 barrels fresh water

3. Pump at least 10 barrels of sodium silicate; use the straight material for severe losses, or mix half-and –half with fresh water if less that total lost circulation.

4. Pump another 3 to 5 barrels fresh water spacer; displace to loss zone with salt water or mud. Local experience may indicate that repeated stages of (1) through (4), with smaller volumes of calcium chloride solution in (1), may be more effective in stopping losses.

5. Optionally, a squeeze with cement containing bridging agents such as gilsonite may be run after step 4. The cement should flash-set on contacting sodium silicate in the formation.

C. Sealing Casing Leaks Moderate to severe casing leaks can frequently be permanently repaired with a procedure similar to the lost circulation procedure above. Volumes used will vary widely depending on casing size and other local conditions. The big advantage of sodium silicate over cement in repairing casing leaks is that the silicate contains no solid particles to bridge off at the leaks. This lets sealant get outside the leak, where it is actually needed. A cement squeeze behind the silicate treatment is optional, depending on local experience and severity of the leak.

D. BOTTOM-WATER SHUT OFF If a reasonable guess can be made as to the point-of-entry of bottom water, the lost-circulation procedure above can also be modified to provide a permanent shut-off. Care needs to be taken to avoid placing sodium silicate in productive zones, as it is very difficult to remove once it is set. A generalized method for water shutoff might be:

1. Pull production equipment. Set a packer or cement retainer immediately above the wet zone, or perforate into the water below existing perforations. Test for injectivity into both the wet zone and the producing zone, using formation-compatible fluids.

2. Pump a formation-compatible fluid such as formation brine, clean crude oil, or diesel down the backside while pumping 10-20 bbl 10% calcium chloride brine down tubing into the wet zone. Continue injection, into the productive zone throughout the entire procedure.

3. Follow the calcium chloride brine with a 3 to 5 barrel fresh-water spacer

4. Pump 10 to 20 bbl sodium silicate, either straight or mixed 1:1 with fresh water.

5. Displace the silicate to the wet formation; again, local experience may determine whether a cement squeeze should follow the silicate treatment. If cement is run, a 3-5 bbl fresh water spacer is all that is required to separate step (4) from the cement.

6. Allow normal WOC time before returning well to production.



Chemplex, Ltd.

Product Bulletin

GENERAL INFORMATION Chemplex Stop Loss Spacer is an industry proven, highly effective spacer used to control moderate to severe loss circulation during cementing and drilling. Chemplex Stop Loss Spacer is composed of Stop Loss Polymer and Stop Loss LCM and when mixed is a dark brown moderately viscous fluid. Conventional weighting agents such as barite and hematite can be used to weight the Stop Loss Spacer to 18.0 ppg. During cementing, the Stop Loss Spacer is pumped directly ahead of the cement to stop mud losses, attain higher cement tops and more consistent anticipated “top of cement”. The Stop Loss Polymer has a “wall building” capability to help consolidate loose, fragile or fractured formation strata and hole condition. The Stop Loss LCM is added where moderate to severe loss circulation is experienced. The Stop Loss Spacer is also an effective cement spacer used to displace drilling mud prior to cementing for improved cement bonding and subsequent bond logs. Where oil based or invert muds are displaced, surfactants are utilized to water wet the formation and pipe surfaces for enhanced bonding. During drilling where severe to total loss circulation is experienced, the Stop Loss Spacer, containing the Stop Loss Polymer and LCM, is pumped into the drill string and circulated until the losses are controlled and drilling can resume to the desired depth (TD). PHYSICAL PROPERTIES Stop Loss Polymer LCM Specific Gravity: 1.2 1.4-1.65 Water Solubility: Dispersible Dispersible Oil Solubility: Dispersible Dispersible Appearance: Light brown Light brown powder fibrous powder

CHEMICAL DESCRIPTION Chemplex Stop Loss Spacer incorporates Stop Loss Polymer, a non-hazardous highly bio-degradable proprietary patented of polymeric fluid loss additives. Stop Loss LCM is added where moderate to severe loss circulation is experienced and is a patented blend of highly specific lost circulation additives that target and control loss circulation. Stop Loss Spacer utilizes a specialized surfactant to water wet the formation when used with oil based or invert muds.

LIMITATIONS Chemplex Stop Loss Spacer can be removed by fresh water. Fresh water spacers should not be pumped between the cement slurry and Stop Loss Spacer. Limit washing-up to 1 bbl to 2 bbls of fresh water. Stop Loss Spacer is not compatible with other spacers when pumped between the Stop Loss Spacer and cement although; spacers may be pumped ahead of the Stop Loss Spacer. Special water-wetting surfactants are utilized when displacing oil based or invert muds. Once the Stop Loss Spacer has stopped the loss circulation, maintain a positive wellbore pressure to maintain the Stop Loss Spacer seal. Avoid reducing the wellbore pressure (HH) to less than the formation pressure (underbalanced) where the Stop Loss Spacer can unseal and revert to loss circulation. RECOMMENDED USES Chemplex Stop Loss Spacer is used eliminate or significantly reduce loss circulation during cementing or drilling. Stop Loss Spacer is used where a “wall building” polymer is needed to consolidate weak, loose or fragile formation strata or hole condition. Stop Loss Spacer is used to sustain a higher and more consistent “Top of Cement” thereby reducing remediation costs. Stop Loss Spacer is also used as a spacer to efficiently displace drilling mud to enhance cement to pipe and cement to formation bonding.

Chemplex Stop Loss Spacer

“Loss Circulation Spacer for Cementing and Drilling”



Chemplex Stop Loss Spacer typical loadings include a base of Stop Loss Spacer Polymer that can be modified according to the severity of the loss circulation problem. Stop Loss Spacer LCM is used when moderate to severe loss circulation (total losses) problems are encountered and vary according to the severity of the loss circulation. Stop Loss Spacer can be used to 350F+ BHCT.

Created 03-03-2011 Updated 04-25-2011

Updated 09-07-2011

PACKAGING Chemplex Stop Loss Spacer packaging normally include Stop Loss Polymer in 40 lb bags and Stop Loss LCM also in 40 lb bags. Bag weights can vary according to customer specifications.

AVAILABILITY Chemplex Stop Loss Spacer is available from Chemplex, Ltd. and any of Chemplex’s stocking locations and include Breckenridge, Kilgore, Midland, Pleasanton and Snyder, Texas, Arapaho, Oklahoma and Albright, West Virginia.



Chemplex, Ltd.

Product Bulletin

GENERAL INFORMATION Chemplex Plexcrete SFA is an industry proven substitute for the silica fume in silica fume cements used for its increased handling ease and safety. Plexcrete SFA, when used in the same concentrations as silica fume and mixed at the same density attains near identical compressive strengths as silica fume in cements. Plexcrete SFA can be blown directly into a silo without the expensive blending that is required with silica fume such as Silica-Poz, Silica-Blend, Silica-Lite, etc. Plexcrete SFA is a lower cost alternative to silica fume that is specifically formulated to produce performance and consistency without the TTT variations of the silica fume “byproduct”. Plexcrete SFA is a highly specialized blend of silica, metals and inorganic salts fired in a kiln for a product quality that conforms to ASTM specifications. Plexcrete SFA is a highly specific formulation that does not require the extremely fine particle size of silica fume to develop the compressive strength of fume cements. Plexcrete SFA provides increased safety, direct pneumatic transfer to the silo, product consistency and reduced cost with the high compressive strength development of fume cements. PHYSICAL PROPERTIES Specific Gravity: 2.30 Bulk Density: 33 lb/cubic foot Absolute Volume: 0.0521 gallon/pound CHEMICAL DESCRIPTION Chemplex Plexcrete SFA incorporates a proprietary blend of silica, iron and inorganic salts fired in a kiln to exacting ASTM specifications (ASTM C-188, ASTM C-227, ASTM C-311, ASTM C-430, ASTM C-1012 and ASTM C-1260). ASTM particle specifications require 76% pass through a 325 (45 um) sieve.

RECOMMENDED USES Chemplex Plexcrete SFA is used to replace silica fume or flyash:silica fume blends in cement systems that have historically utilized silica fume. Plexcrete SFA replaces silica fume pound for pound in cement systems such as: Fly-Ash Class C Plexcrete SFA Density 15 lbs 61 lbs 11 lbs 13.0-14.5 ppg 20 lbs 47 lbs 17 lbs 12.0-13.6 ppg 17 lbs 70 lbs 13 lbs 12.0-12.5 ppg Chemplex Plexcrete SF uses and benefits: 1. Industry proven replacement for silica fume. 2. Used in oil field cementing since 2004. 3. Significantly less hazardous than silica fume. 4. Develops the near identical 72 hr compressive

strengths as silica fume in fume cements. 5. Lowers the cost of silica fume in cements. 6. Can be blown directly into the cement silos. 7. Silica fume and fly-ash blends are not needed. 8. Mined and manufactured to ASTM standards. 9. Allows use of lightweight completion cements. 10. Used with fly-ash to control final slurry costs. 11. SMS, HEC & Salt are commonly used to

control Total Thickening Times & Fluid Loss. 12. Compatible with most cement additives.

LIMITATIONS Chemplex Plexcrete SFA when used as a replacement for silica fume will yield slightly lower slurry viscosity, slightly longer Total Thickening Times, and slightly higher fluid loss. The use of low concentrations of sodium meta-silicate (SMS), i.e., 0.1%, etc., will increase the slurry viscosity and reduce the Total Thickening Times to nominal values. Cellulose fluid loss additives can be used to obtain the desired fluid loss and Total Thickening Times per customer specifications. Plexcrete SFA is compatible with most cement additives. Slurry performance data is included in the attached Technical Information.

Chemplex Plexcrete SFA

Silica Fume Alternative for Cement Systems & Cements



PACKAGING Chemplex Plexcrete SFA is delivered in bulk in a pneumatic transport or 50 pound sacks. AVAILABILITY

Created 03-03-2011

Updated 03-03-11

Chemplex Plexcrete SFA is available from Chemplex, Ltd. and any of Chemplex’s stocking locations and include Breckenridge, Kilgore, Midland, Pleasanton and Snyder, Texas and Arapaho, Oklahoma.



TECHNICAL INFORMATION

PLEXCRETE SFA AND SILICA FUME COMPARISON

BHCT

(F)

BHST

(F)

Depth (Ft)

TTT

(hr:min)

SLURRY

%

Mix H2O

Wgt (ppg)

Yld

(cuft/sk)

Strength

(psi)

Fluid Loss

Free H2O

140

155

10000

3:51

15:61:11 (Flyash:Class C:Plexcrete SFA) + 0.9% FLA + 0.25% CD + 3% KCl + 5 pps LCM

(Plexcrete SFA)

72.8

13.2

1.60

(155F) 12 hr-400 24 hr- 1600 72 hr-2350

102

0.0

140

155

10000

3:49

15:61:11 (Flyash:Class C:Silica Fume) + 0.9% FLA + 0.25% CD + 3% KCl + 5 pps LCM

(Silica Fume)

72.8

13.2

1.60

(155F) 12 hr-500 24 hr- 1900 72 hr-2380

80

0.0

ASA: Anti-Settling Agent, CD: Cement Dispersant, FLA: Fluid Loss Additive, LCM: Lost Circulation Material, PVA: Poly Vinyl Alcohol FLA. Compressive strengths ran at BHST unless otherwise specified.



TECHNICAL INFORMATION CLASS C CEMENT

BHCT (F)

BHST (F)

Depth (Ft)

TTT (hr:min)

Slurry % Mix H2O

Wgt (ppg)

Yld (cuft/sk)

Strength (psi)

Fluid Loss

Free H2O

140 160 10000 4:40 15:61:11 (Flyash:Class C:Plexcrete SFA) + 0.9% FLA + 0.5% PVA + 0.25% CD + 5% Salt + 0.6% Retarder + 5 pps LCM

74.75 13.20 1.64 12 hr-90 24 hr-450 72 hr-2050

40 0.0

135 160 12000 3:45 15:61:11 (Flyash:Class C:Plexcrete SFA) + 1.1% FLA + + 0.5% PVA + 0.5% CD +2% Salt + 026% Retarder + 5 pps LCM

72.80 13.20 1.60 12 hr-600 24 hr-1800 72 hr-2300

30 0.0

130 150 9000 3:20 Class C + 20 pps Plexcrete SFA + 4% Plexcrete STE + 4% SMS + 5% Gypsum + 0.4% ASA + 2.5% Retarder + 3 pps LCM

201.10 11.30 3.80 (120F) 12 hr-250 24 hr-400 72 hr-850

0.0

100 120 5200 4:50 50:50:0 (Flyash:Class C:Bentonite) + 10 pps Plexcrete SFA + 1% SMS + 3% Salt +0.4% Retarder + 5 pps LCM

129.90 11.80 2.39 12 hr-250 24 hr-500 72 hr-1000

3.4

105 115 5000 3:30 17:70:13 (Flyash:Class C:Plexcrete SFA) +0.4% PVA + 0.5% SMS + 5% Salt + 0.2 gps Foamer

99.60 (base)

12.50 (base)

2.22 (base)

(10 ppg) 12 hr-170 24 hr-250 72 hr-450

0.0

90 100 2000 4:45 20:47:17 (Flyash:Class C:Plexcrete SFA + 1.5% FLA + 0.2% SMS

77.25 13 1.55 12 hr-230 24 hr-350 72 hr-750

80 80 3000 11:30 15:61:11 (Flyash:Class C:Plexcrete SFA) + 0.8% FLA + 0.5% PVA + 0.2% CD + 0.5% SMS + 5% Salt + 3 pps LCM

77.21 13.20 1.65 (80F) 12 hr-0 24 hr-400 72 hr-1500

0.0




TECHNICAL INFORMATION CLASS H CEMENT BHCT

(F) BHST

(F) Depth (Ft)

TTT (hr:min)

Slurry % Mix H2O

Wgt (ppg)

Yld (cuft/sk)

Strength (psi)

Fluid Loss

Free H2O

200 245 16500 5:50 15:61:11 (Flyash:Class H:Plexcrete SF) + 5 PPS Silica Sand + 1% FLA + 0.3% PVA + 0.2% SMS + 0.3% ASA + 0.2% Retarder

69.30 13.70 1.50 (245F) 12 hr-1500 24 hr-1750 72 hr-2000

50 0.0

200 240 16500 5:00 Class H + 35% Silica Sand + 20 pps Plexcrete SFA + 0.9% FLA + 0.5% PVA + 1% CD + 0.5% SMS + 0.3% ASA + 0.5% Retarder

67.97 15.20 1.88 (200F) 12 hr-250

24 hr-2200 72 hr-2600

0.0

200 245 16500 6:40 35:65:6 (Flyash:Class H:Bentonite) + 5 pps Plexcrete SFA + 0.8% FLA + 0.2% SMS + 0.3% ASA + 0.4% Retarder

106.1 12.50 2.04 (220F) 12 hr-7500 24 hr-950

72 hr-1050

130 150 8500 20:47:17 (Flyash:Class H:Plexcrete SFA) + 1% PVA + 1% SMS + 0.2% ASA + 0.6% Retarder

91.53 12.5 1.75 (140F) 12 hr-175 24 hr-978

72 hr-1400

145 145 10000 4:40 20:47:17 (Flyash:Class H:Plexcrete SFA) + 1.5% SMS + 0.2% ASA + 1.65% Retarder + 3 pps LCM

106.5 12.00 2.00 (145F) 12 hr-125 24 hr-705

72 hr-1100

350 0.0




Chemplex, Ltd.

Product Bulletin

GENERAL INFORMATION Chemplex Plexcrete STE is a non-silicate compressive strength enhancing additive for cements and cement blends where higher compressive strengths are desirable. Slurry yields can be extended and densities reduced while still obtaining higher compressive strengths considered desirable in completion cements. Plexcrete STE was specifically designed to replace competitive type products at a much reduced cost while providing the same functionality. Plexcrete STE’s non-silicate chemistry performs near identically to competitive products at less than 200F and an improved performance at greater than 200F. Safety in handling and loading is greatly improved by the non-silicate based Plexcrete STE. Plexcrete STE is a highly specialized blend of Portland cement, metal oxides, and inorganic salts fired in a kiln to the exacting specifications of ASTM C-114. Plexcrete STE’s highly specific formulation does not require silica fume or other more expensive products to develop higher compressive strengths. Plexcrete STE non-silicate base provides increased safety in handling and loading, product consistency and reduced cost with high performance compressive strength development in Portland Cements and is especially effective in cement and Flyash blends. PHYSICAL PROPERTIES Specific Gravity: 3.049 Bulk Density: 64 lb/cubic foot Absolute Volume: 0.0393 gallon/pound CHEMICAL DESCRIPTION Chemplex Plexcrete STE incorporates a proprietary blend of Portland cement, iron oxides and inorganic salts fired in a kiln to exacting ASTM C-114 specifications. Particle size is 99% through a 325 (45 um) sieve.

RECOMMENDED USES Chemplex Plexcrete STE is used increase to increase the compressive strength of cements and cement-flyash blends. Plexcrete STE replaces more expensive additives with a safer non- silica additive with near identical or improved results. Plexcrete STE replaces other aluminum type additives pound for pound: Fly-Ash:Class C Plexcrete STE Density 0: 94 lbs 4%-6% 10.5- 12.0 ppg 35:65 4% 12.0-13.0 ppg 40:60 4% 13.6-13.8 ppg 60:40 4% 13.6-13.8 ppg Chemplex Plexcrete STE uses and benefits: 1. Replaces more expensive strength enhancers. 2. Significantly less hazardous than silica fume. 3. Develops near identical compressive strengths

than more expensive additives at 200F or less. 4. Develops higher compressive strengths than

more expensive additives at greater than 200F. 5. Especially effective in flyash:cement blends

and ideally in 40:60 and 60:40 blends. 6. Lower the cost of using strength enhancers. 7. Mined and manufactured to ASTM standards. 8. Allows use of lightweight completion cements. 9. Compatible with most cement additives, i.e.,

HEC, PVA, Lignosulfonate retarders, salts etc.

LIMITATIONS Chemplex Plexcrete STE will increase the final slurry cost which can be offset with flyash:cement blends especially 40:60 which may yield lower cementing costs and high compressive strengths that can be used as completion cements. The use of Flyash is beneficial to reducing cement permeability and increasing resistance to corrosive waters, gasses such as H2S, CO2, etc. Plexcrete STE is compatible with most cement additives. Slurry performance data is included in the attached Technical Information.

Chemplex Plexcrete STE Compressive Strength

Enhancing Additive for Cement



PACKAGING Chemplex Plexcrete STE is delivered in 50 pound sacks. AVAILABILITY

Created 03-16-2011

Updated 03-16-11

Chemplex Plexcrete STE is available from Chemplex, Ltd. and any of Chemplex’s stocking locations and include Breckenridge, Kilgore, Midland, Pleasanton and Snyder, Texas and Arapaho, Oklahoma.




PLEXCRETE STE AND ALUMINUM SILICATE STRENGTH ENHANCER COMPARISON

BHCT

(F)

BHST

(F)

Depth (Ft)

TTT

(hr:min)

SLURRY

%

Mix H2O

Wgt (ppg)

Yld

(cuft/sk)

Strength

(psi)

Fluid Loss

Free H2O

160

200

12500

3:04

60:40 (Flyash:Class H) + 4% Plexcrete STE + 4% SMS + 0.2% ASA + 0.2% Retarder

(Plexcrete STE)

67.00

13.6

1.38

(200F) 12 hr-1600 24 hr-1800 72 hr-1900

ND

ND

160

200

12500

3:04

60:40 (Flyash:Class H) + 4% Aluminum Silicate + 4% SMS + 0.2% ASA + 0.2% Retarder

(Aluminum Silicate)

66.20

13.6

1.38

(200F) 12 hr-1550 24 hr-1800 72 hr-2000

ND

ND

125

135

8000

2:45

60:40 (Flyash:Class C) +4% Plexcrete STE + 0.5% PVA + 0.5 pps Salt + 2 pps LCM

(Plexcrete STE)

62.1%

13.8

1.35

(135F) 12 hr-1300 24 hr-2400 72 hr-3000

ND

ND

125

135

8000

2:30

60:40 (Flyash:Class C) +4% Aluminum Silicate + 0.5% PVA + 0.5 pps Salt + 2 pps LCM

(Aluminum Silicate)

61.4%

13.8

1.35

(135F) 12 hr-950 24 hr-2300 72 hr-3000

ND

ND





CLASS H AND C CEMENTS AND FLYASH BLENDS

BHCT (F)

BHST (F)

Depth (Ft)

TTT (hr:min)

Slurry % Mix H2O

Wgt (ppg)

Yld (cuft/sk)

Strength (psi)

Fluid Loss

Free H2O

160 200 12500 3:04 60:40:0 (Flyash:Class H:Bentonite) + 4% Plexcrete STE + 0.4% SMS + 0.2% ASA + 0.2% Retarder

66.96 13.60 1.38 12 hr-1600 24 hr-1800 72 hr-1900

ND ND

130 180 7500 4:40 35:65:4 (Flyash:Class H:Bentonite) + 5% Plexcrete STE + 0.4% FLA + 0.3% CD + 0.6% SMS + 2.5 pps Salt + 0.4% Retarder + 3 pps LCM

96.0% 12.8 1.94 (120F) 24 hr-450 72 hr-1250 7 Day-1700

ND ND

130 150 9000 4:16 60:40:0 (Flyash:Class H:Bentonite) + 4% Plexcrete STE + 0.5% PVA + 0.5 pps Salt + 0.2% Retarder + 2 pps LCM

62.00 13.80 1.35 12 hr-900 24 hr-2200 72 hr-2600

ND 1.4

120 135 8000 2:47 60:40:0 (Flyash:Class C:Bentonite) + 4% Plexcrete STE + 0.5% PVA + 0.5 pps Salt + 0.2% Retarder + 2 pps LCM

62.00 13.80 1.35 12 hr-1300 24 hr-2400 72 hr-3000

ND ND

110 130 6000 2:45 40:60:0 (Flyash:Class C:Bentonite) + 4% Plexcrete STE + 0.4% SMS

67.50 13.80 1.43 12 hr-1100 24 hr-1800 72 hr-2900

ND ND

100 110 4000 3:20 35:65:0 (Flyash:Class C:Bentonite) + 6% Plexcrete STE + 0.2% FLA + 0.85 SMS + 2.8 pps Salt

107.0 12.50 2.00 12 hr-650 24 hr-900 72 hr-1300

ND ND

80 100 1500 5:30 Class C + 6% Plexcrete STE + 3% SMS + 2% CaCl2 144.10 11.80 2.72 12 hr-288 24 hr-475 72 hr-750

ND ND


his information relates only to the specific material designated and may not be valid for such material used in combination with any other materials or in any process. Such information is, the best of our knowledge and belief, accurate and reliable as of the date compiled. However, no representation, warranty or guarantee is made as to its accuracy, reliability or completeness. It is the user’s responsibility to satisfy himself as to the suitability and completeness of such information for his own particular use. We do not accept liability for any loss or damage that may occur from the use of this information nor do we offer any warranty against patent infringement.

Chemplex Ltd. * P.O. Box 1071 * Snyder, TX 79550 * (325) 573-7298

Chemplex, Ltd.

Product Bulletin

GENERAL INFORMATION Plexaid StatFree is a powdered additive intended to reduce “static cling” encountered in pneumatic conveying of cement blends, pozzolan or silica fume, frac sand, resin-coated proppants, and similar materials. It can provide improved conveying of these materials by reducing blockages and “wormholing” in bins.

PHYSICAL PROPERTIES Solubility in water: Insoluble Appearance: Fine white powder Odor: Faintly medicinal Flash point: None Ionic Charge: Cationic

CHEMICAL DESCRIPTION Plexaid StatFree contains proven antistatic agents absorbed on an inert non-crystalline silica carrier. At recommended loadings it should not significantly affect the properties of cement slurries or of frac fluids.

RECOMMENDED USES Plexaid StatFree is typically used at 0.02% to 0.05% by weight of the dry material being treated. It should be added to the solids at the earliest opportunity during handling; for example, as the first component in a cement blend. Dosage level will depend on the particular material being treated. It is suggested that 0.05% be used as a starting point, backing off or increasing loading depending on local experience.

PACKAGING Plexaid StatFree is obtainable in 50-pound bags. DOT information: Not Regulated under D.O.T. Dust may be irritating.

AVAILABILITY Plexaid StatFree is available from Chemplex, Ltd. at any of our distribution facilities. Created 13 August 2010

Plexaid StatFree Antistatic Agent



Chemplex, Ltd.

Product Bulletin

GENERAL INFORMATION Plexfoam C-7 is a product designed for foaming cement for oilfield applications.

PHYSICAL PROPERTIES Density: 8.66 lb/gal Absolute volume: 0.115 gal/lb Solubility in water: Soluble Appearance: Yellow liquid Odor: Faint rubbing alcohol Flash Point: > 200°F Freeze Point: 5°F pH: 5.0 – 7.5

CHEMICAL DESCRIPTION Plexfoam C-7 foamer combines amphoteric and anionic foaming agents in an alcohol/water carrier. As some of the components are ammonium salts, cement slurries containing Plexfoam C-7 may smell like ammonia.

TREATING APPLICATIONS Plexfoam C-7 at loadings of around 0.1 gallon/sack will provide excellent foam stability in normal foamed cement designs. It is widely held to be good practice to avoid the use of dispersants, highly dispersing additives like lignosulfonate retarders, and, of course, defoamers in foamed cement designs. Chemplex C-18 as a fluid-loss additive and Chemplex C-26 as a retarder are suggested to avoid foam stability problems.

PACKAGING Plexfoam C-7 is obtainable in 55 gallon poly drums or poly totes. DOT information: Not DOT regulated

AVAILABILITY Plexfoam C-7 is available from Chemplex, Ltd. at any of our stocking locations.

Updated 4 June 2010

Plexfoam C-7 Foamer for Cement



Chemplex, Ltd.

Product Bulletin

GENERAL INFORMATION MC-500 is a form of cement with a particle size about one-tenth that of API oilwell cements. This small size makes it very useful for sealing small leaks, a job that can be difficult with conventional cement squeezes.

PHYSICAL PROPERTIES Specific gravity: 2.9 Appearance: Tan powder Absolute volume: 0.0414 gal/lb Solubility in water: Insoluble; reacts

CHEMICAL DESCRIPTION MC-500 is a cement prepared from blast-furnace slag. It is chemically similar to a high sulfate resistant (HSR) oil well cement.

LIMITATIONS MC-500 should not be mixed at densities over 12.0 lb/gallon, as it will be very thick above that density. The use of C-35 dispersant at 0.5% to 1% is strongly suggested both for mixability and for best performance in penetrating leaks. MC-500 is compatible with most conventional oil well cement additives, though it will require more retarder than conventional cements. Fluid loss additives are not normally used with MC-500.

.

RECOMMENDED USES MC-500 can be mixed according to the following schedule. The sack basis is 55 pounds of product. Density Mix water Yield 11.0 lb/gal 11.60 gal/sk 1.84 cu. ft./sk 11.5 lb/gal 9.31 gal/sk 1.55 cu. ft./sk 12.0 lb/gal 7.73 gal/sk 1.33 cu. ft./sk Examples of some slurries are on the following page. MC-500 should be considered for repair of collar leaks, pinhole leaks in pipe, micro-annulus leaks, or any situation where conventional cement will not penetrate.

PACKAGING MC-500 is furnished in 55-pound lined bags. Opened containers should be tightly closed to preserve integrity of product. AVAILABILITY MC-500 is available from Chemplex facilities in Snyder, Texas or from any of our stocking locations.

Updated 1-18-10

MC-500 Microfine Cement



Example Slurries with MC-500

Strength Density gal/sk additives temperature 24-hour 72-hour 11.0 lb/gal 11.6 none 80 F 125 psi 185 psi 11.5 9.31 none 80 F 225 540 12.0 7.73 none 80 F 450 1060 11.5 9.31 none 120 F 240 440 ------------------------------------------------------------------------------------------------------------------------------ Density gal/sk additives temperature thickening time 11.5 lb/gal 9.31 none 80 F ~6 hr 11.5 9.31 0.27 lb/sk C-35 80 F ~7 hr 12.0 7.73 1.10 lb/sk C-26 190 F ~3.5 hr 12.0 7.73 0.82 lb/sk C-26 + 190 F ~2.5 hr 0.82 lb/sk C-35

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