PBL Multiple Activation Autolock Bypass System

The PBL Multiple Activation Bypass System is a simple, reliable tool that can assist you in reducing drilling costs associated with different types of hole conditions. Originally developed to enable the aggressive pumping of LCM materials and to increase circulation rates, the PBL has evolved to benefit many applications in the drilling, completion, and workover phases of a well such as:

• Pumping all types of LCM materials, including aggressive pills and cement squeezes • Increasing circulation rates for improved hole cleaning resulting in reduced torque and drag, thereby increasing ROP • Increasing annular velocity in highly deviated and horizontal wellbores where removal of cutting beds and hole cleaning are problematic • Fluid displacements • Sub-sea riser/BOP jetting • Acidizing and stimulation treatments • Coring applications

In addition, the PBL has several unique features:

• The PBL tool will close when the pumps are shut down minimizing a U tubing effect or possible well control issues that can occur in other tools • The Autolock option, which allows for pulling a dry workstring or filling the drillstring while tripping in the hole. The Autolock option also provides an option to reverse circulate if necessary • The PBL can be cycled numerous times in a single trip • The ball shearing pressure can be set to the operator’s preference • The main body and the catcher sub can be placed in different sections of the BHA to optimize workstring operations

PBL Multiple Activation Autolock Bypass System

www.dsi-pbl.comDRILLING SYSTEMS INTERNATIONAL

DSIOpen Position Locking Ball De-activation Ball catcher sub



DSI

LOST CIRCULATION:

The PBL Multi-Activation Bypass System is an effective tool to combat lost circulation problems.With the tool run as low in the BHA as possible it can be opened (activated) by simply droppinga ball. When the tool opens operators are not limited in the size or concentration of LCM they can pump. All types of LCM pills, including aggressive pills and cement squeezes can be used; thelimitations rest with the surface equipment. Once circulation is regained the tool can now be closed. Simply drop two steel balls to close thetool and drill ahead. If the problem is encountered again the PBL Multiple Activation BypassSystem can be opened and closed down hole up to six times a bit run.Activation and De-Activation Sequence:

Drilling Mode Flow to Bit

Vinyl Activation Ball Seated

Open PositionFlow Through Ports

Steel De-Activation Balls Dropped Pressure Up

Balls Sheared Through Seat Tool Reset

Drilling Mode Flow to Bit



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INCREASING FLOW RATES BEYOND CRITICAL LIMITS: All Direction Drilling tools have critical limits that operators must not exceed. The limits set ondirectional tools by manufacturers often restrict operators from achieving preferred circulatingrates for effective hole cleaning. The PBL Multi-Activation Bypass system is useful in increasingcirculation rates 4 times that of rates allowed through directional tools by manufacturers. Circulate at 4 times the critical limit through the PBL Multiple Activation Bypass System. HIGHLY DEVIATED WELLS: In highly deviated and horizontal well bores, where removal of cutting beds and hole cleaning areproblematic, the PBL Multi-Activation Bypass system is an ideal tool for increasing circulation ratesfor improved hole cleaning, resulting in reduced torque and drag, thereby increasing ROP. SUB SEA RISER/BOP JETTING: The PBL Multiple Activation Bypass System can be utilised to jet BOPs and risers during drillingand completion operations. The jetting application can be performed by opening and closing thePBL Bypass System without the need for tripping jetting tools in and out of the hole.


DRILLING

D

APPLICATIONS OF THE AUTOLOCK FEATURE: The PBL Autolock Multiple Activation Bypass System was developed to allow for safer and timelier tripping. By locking the tool in the open pos l string can easily be drained or filled during tripping operations. Some of the applic Autolock feature are -

• Trip Dry Pipe: The PBL Autolock Tool can be locked followed by one locking ball. Because the TFA is cu which will indicate the tool is locked open, allowin of the hole. • Fill Pipe: Running in the hole with the PBL Autolo filling the pipe. When it is desired to close the tool

• Equalize and Reverse Circulate: If differential sti opened to allow lighter fluid to be pumped down pipe coming free, conventional circulation can be hole and out of the system. • Equalize and Reverse Circulation for Effective C fluids during displacement operations to achieve m

After the vinyl activation Ball is To close the po seated, the locking ball is dropped. de-activation b The locking ball will automatically locking ball thr migrate to one port and locking and the activat the tool open. the ball seat.

ition, the drilations of the

www.dsi-pbl.com SYSTEMS INTERNATIONAL

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open by dropping one activation ball, t in half, there will be a slight pressure increase,g one port to drain the pipe while tripping out

ck Bypass System will eliminate costly time, drop two steel de-activation balls and close the tool.

cking occurs the PBL Autolock Bypass tool can be the annulus until the pipe comes free. With theresumed to displace the lighter fluid out of the

ompletions: Utilize the PBL Autolock tool to reverseaximum annular velocities to clean the wellbore.

rts, drop two The locking ball is sheared throughalls to shear the the port and migrates up through ough the port the anulus. The other balls dropion ball through into the ball catcher cage.



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THE PBL SLIDING SLEEVE BIG BORE (SSBB) SYSTEM: The standard PBL Multiple Activation Autolock Bypass System is activated and de-activate bydropping one vinyl activation ball and two chrome de-activation balls, respectively. These balls areretained in the ball catcher cage once they are passed through the main body. The PBL Sliding Sleeve Big Bore System does not use activation and de-activation balls. Instead, ituses a retrievable dart that can be retrieved to the surface using a overshot wireline system. Withthe large ID, and no balls in the ball catcher cage, it provides the operator with the ability to deploy or retrieve probe style MWD sensors, drilling tools, core barrels and activation balls for other tools. The SSBB system can also be locked open, using a locking ball, but must be un-locked at the surface. Activation and De-activation Sequence for the Sliding Sleeve Big Bore System: Flow and Access Activation Dart Open Position Dart Picked up by Flow and Access Through to Bit Seated Flow throughPorts Wireline, Ports Closed Through to Bit

Tool OD (inF) Drift ID¹ (in) Port TFA² (in²) Connection Size³ Number of Cycles 9 1/2 2.63 3.53 7 5/8 Reg Unlimited

Tool OD (in) Drift ID¹ (in) Port TFA² (in²) Connection Size³ Number of Cycles 9 1/2 2.63 3.53 7 5/8 Reg Unlimited 8 1/4 2.63 3.53 6 5/8 Reg Unlimited 6 1/2 2.24 2.45 4 1/2 IF Unlimited 6 3/4 2.24 2.45 4 1/2 IF Unlimited

TECHNICAL SPECIFICATIONS FOR PBL SSBB SYSTEM

¹ Alternative Drift ID’s available to accommodate drill pipe restrictions² Fullbore Port TFA listed³ Alternative connection may be available



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ACTIVATION PROCEDURE: • Break the drill string at the drill floor and drop the vinyl activation ball in the string. The vinyl ball can be displaced at a high flow rate 50%-70% displacement volume. The time it takes to pump the vinyl ball down to the ball seat will be affected by the fluid characteristics and volume. • When the activation ball reaches the ball seat, an initial/brief rise in pressure will be seen at the surface, and then a pressure loss will occur, the inner mandrel will have dropped to its open position and the fluid diverted through the side ports. Increase the pump strokes and circulate the desired fluid keeping a constant pump rate for the PBL Sub. The force required to open the ports is approximately 100-150 psi. • Drop the locking ball if required to keep ports/tool in open position when pumps are switched off. • In situations where high mud weights are used, or the drill string is plugged, the ball/dart combination will allow the activation ball to migrate to the ball seat faster. Also successful in high angle wells. DE-ACTIVATION PROCEDURE:

• Break the drill string at the rig floor and drop the appropriate steel deactivation balls and pump at drilling rate or higher. When the steel balls reach the PBL tool they will cut off flow through the ports

creating a pressure increase. It is preferred, when the steel ball lands in the tool, to increase the pump rate and achieve the pre-set ball shearing pressure as quickly as possible.

• The vinyl activation ball will blow through the seat at the preset ball shearing pressure and be caught in the ball catcher sleeve. Ball shearing pressure can be set to operator’s preference.

• The piston will then move up closing the circulating ports and causing the steel balls to drop in the ball catcher sub/sleeve. Circulation will then be through the bottom hole assembly.

Complete Ball Set - Vinyl Activation Ball,Ball/Dart Activation Ball, ChromeDe-Activation Balls and Locking Ball is retrieved using the wireline

Activation Dart used with the Sliding Sleeve Big Bore (SSBB) System. This Dart



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COMPONENTS OF THE PBL MULTIPLE ACTIVATION AUTOLOCK BYPASS SYSTEM: The animated image on the below left shows the main components of the standard PBL Sub. The Pictures on the below right shows two views of the ball catcher cage. As evident from the pictures,and from the vast history of the PBL usage, the ball catcher cage allows adequate flow through tothe bit, even when it is full of activaton and de-activation balls. PBL Multiple Activation Bypass Toolsare dressed standard for Hot-Hole Service (450°F /232°C).

Ball Catcher Cage Top View

Spring Sliding Sleeve Ball Catcher Cage



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BALL SIZES TOOL ACTIVATION BALL DART STEEL TOOL 1 x BRASS DARTSIZE VINYL BAL COMBINATION DE-ACT CYCLES COMBINATION

& EMERGENCY CYCLESHUT OFF

3 1/8” 1” 1” 5/8” x 2 5 33 1/2” 1 1/4” 1 1/4” 1 1/8” x 2 3 24 3/4” 1 1/2” 1 1/2” 1 3/8” x 2 4 36 3/4” 2” 2” 1 3/8” x 2 5 49 1/2” & 8 1/4” 2 1/2” 2 1/2” 1 3/4” x 2 5 4 BALL WEIGHTS STANDARD VINYL STEEL DE-ACT WTD BRASS DARTS Size Weight Size Weight Size Weight 1” 10gm 7/8” 50gm N/A N/A1 1/4” 20gm 1 1/8” 100gm N/A N/A1 1/2” 35gm 1 3/8” 175gm 1 1/2” 245gm2” 80gm 1 3/4” 350gm 2” 740gm2 1/2” 150gm 1 3/4” 600gm 2 1/2” 900gm BALL SEATS TOOL BALL SEAT ID ACTIVATION BALL SIZE 4 3/4" 1 2/8" 1 1/2"6 3/4" 1 7/8" 2"8 1/4" 2 3/8" 2 1/2"9 1/2" 2 3/8" 2 1/2"

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Documents

PBL Multiple Activation Autolock Bypass System