DCT - Drill Rods & Casing - Eng OK · 2019. 2. 27. · DIAMANTINA CHRISTENSEN 2 DRILL RODS & CASING. 90 ... • When stacking rods on the mast, place a wooden base or a rubber support

Joint coupling

Operation Tips

WIRELINE RODSCARE AND HANDLING

Drilling companies constantly need to achieve greater depths, while machines are increasingly more powerful and faster. Heat treatment applied to rod ends, enhances their torque and tensile strengths. Steels and machining processes are subject to strict quality controls that guarantee perfect coupling of rods and extend their duration.

• Remove all dust accumulation in male and female threads.• Apply Drill grease to allow proper tightening torque and prevent frictional wear.• For a first connection, decouple, clean and lubricate joints.• Turn the male end clockwise in the female end, ensuring alignment (threads to the right).• Tightening torque preloads the male and female to close the joint, creating a seal to prevent fluid leaking and rod

swaying. Poorly applied tightening torque reduces pull back (tensile) or pull down (compression) capacities.• In negative and/or deep wells, apply greater tightening torque to keep fluid seal in the joints close to the top of the rod

column.• Conversely, apply less tightening torque to joints near the end of the column crown or to joints in rod strings in under-

ground drilling of positive wells, to maximize joints’ pull down capacities.• In deviated wells, tightening torque is critical to prevent swaying leading to fatigue failure. • Excessive tightening torque also reduces the joint’s fatigue strength.

• Insufficient tightening torque may cause joint or thread breaking in female-male ends, in addition to possible fluid leaking. • Apply recommended minimum tightening torque for a secure joint and male/female thread coupling.• Excessive tightening torque reduces drilling performance and maximum depth.

DIAMANTINA CHRISTENSEN 2 DRILL RODS & CASING

90°

Useful life

Joint decoupling

• Abrupt decoupling reduces thread life.

• Do not hit rod male ends when decoupling. Lower suspended rod to one inch (approx.) of the female connected to the rod column and manually screw threads.

• Do not scratch threaded surfaces. This directly affects joint sealability.

• Check that hoisting plug threads and upper header adapters are not worn out or dusty before connecting them to the rod column.

• When stacking rods on the mast, place a wooden base or a rubber support surface to protect male connections. This is very important for handling 20 ft (6 m) or longer rods.

• When tightening rods, keep the wrench at a 90 degree angle from the rod.

• Use full grip rod wrenches to avoid damaging the rod.

• Do not alternate rods with threaded products of similar appearance from other manufacturers.

• Do not place the wrench or mandrel in heat treated bands near the joint as it could cause slipping.

• Do not use cotton gaskets or any type of tape for threads. Thread design allows hermetic leak-proof coupling.

• Do not drag rod threads on the floor.

To maximize the life of rods, plan the drilling schedule so that each rod in the column has the same service life. If a rod is kept at the top of the string as a guide, be sure to discard the rod if the male thread is damaged and never use this rod at the pit bottom.

Drill rods have "memory". Application of excessive torque, stress or bending to a rod, reduces its capacity. This explains why a rod can withstand one or two difficult cycles and then fail in an easy one.


Cleaning and lubrication

The rod’s body shows excessive wear as compared to the diameter of a new rod.

Bulged box or pin.

The thread has cracks or loose material.

Border of pin or box thread is dented or has torn borders.

Presence of leaks when injecting drilling fluid.

Rod has very deformed thread pattern

Box with brandsdeep grip.

Presence of leaks when injecting drilling fluid.

Identification of rods that must be removed

Dented rod bodymay cause core barrel entrapment.

• Threads should be greased to prevent rust.• Do not remove this grease when you use the rod for the first time, unless it is contaminated.• Whenever rods are used, clean and lubricate the threads with a 1 ½ to 2 inch brush.• Do not use too much lubricant. Use enough grease to ensure covering thread surfaces• For maximum performance and to avoid wear by friction, clean threads with grease.• If the thread has signs of pollution signs, clean it and dry it before applying a new grease layer.• Keep the brush and grease clean.


Preparation for transport

Storage

Destructive Tests

Drilling depth

• Always clean and grease threads of rods’ male and female ends before storing them.• Store the rods horizontally on at least three transverse supports at no less than 12 inches (30 cm) from the ground to keep rods away from moisture and dust. • Always place proper protection on threaded ends.

MAXIMUM TORQUE STRENGTH MAXIMUM TENSILE STRENGTH

-

2.000

4.000

6.000

8.000

10.000

12.000

14.000

lbf*ft

NMOHO

HMO

-

20.000

40.000

60.000

80.000

100.000

120.000

140.000

160.000

lbf

NONMO

HOHMO

+ 47%

+ 52%

+ 23%

+ 22%

NO

• Load rods on three transverse supports and tie them with a chain on end supports.• Place plastic protection on threaded ends.


TECHNICAL SPECIFICATIONS

Thread 3 TPI (Threads per inch)

Thread hardness Hardening and Tempering

Performance HEAVY DUTY (BMO) Performance STANDARD (BO)

Joint tensile strength 97.500 lbf (+22%)*

(+47%)*

44.224 kgf 80.000 lbf 36.287 kgf

Threaded joint torque strength 6.100 lbf*ft 842 kgf*mt 4.150 lbf*ft 573 kgf*mt

52 kg

Outer Diameter

“3-Meter Useful Long” Rod Weight

Inner Diameter 46,00 mm

2 inch.

40,2 lb 18,2 kg

55,60 mm

1 inch.1316 46,00 mm

2 inch.

40,2 lb 18,2 kg

55,60 mm

1 inch.1316

Raw Material Seamless precision pipe, cold process ASTM A519 steel high alloy

690 Mpa (100.000 PSI)

Tensile strength (Pipe) 813 Mpa (118.000 PSI)

Linearity (Pipe/Thread) 1 mm x 3 Meters (Max.)

19 Unit Rod Bundle

Hexagonal Steel Cap

Heat Treatment

Thread Treatment

Both ends are heat treated (Hardening and Tempering), pre-threading (4” to 6” approx.)

Pin End / Applying phosphate coating that reduces friction and improvesgrease retention screw.

Box End / Protective oil application prevents rust.

Size and Weight BMO (HEAVY DUTY)Imperial Metric Imperial Metric

BO

316

316

B

Mechanical Properties

Thread Specifications

Heat Treatment and Thread Protection (HEAVY DUTY)

Packing

Thread Profile

(*) Increased tensile and torque

Yield Strength (Pipe)


Performance HEAVY DUTY (NMO) Performance (NO)

105.000 lbf 47.927 kgf

5.500 lbf*ft 760 kgf*mt

60,3 mm

2 ¾ inch.

50,5 lb 22,9 kg

69,9 mm

2 inch.3 8

2 ¾ inch.

50,5 lb 22,9 kg

60,3 mm

69,9 mm

2 inch.3 8

N

128.000 lbf (+22%)*

(+47%)*

58.054 kgf

8.100 lbf*ft 1.120 kgf*mt


52 kg

Size and Weight NMO (HEAVY DUTY)Imperial Metric Imperial Metric

NO



19 Unit Rod Bundle

Hexagonal Steel Cap

Heat Treatment

Thread Treatment





Packing

ThreadThread hardness

Joint tensile strength

Threaded joint torque strength

Outer Diameter


Inner Diameter

Tensile strength (Pipe)

Linearity (Pipe/Thread)

Thread Profile

690 Mpa (100.000 PSI)

813 Mpa (118.000 PSI)

1 mm x 3 Meters (Max.)

3 TPI (Threads per inch)

Hardening and Tempering


Raw Material


Seamless precision pipe, cold process ASTM A519 steel high alloy


H

52 kg

3 ½ inch. 88,9 mm

75,4 lb 34,2 kg

3 inch. 77,8 mm1 16

Performance HEAVY DUTY (HMO) Performance (HO)

130.000 lbf 58.967 kgf

8.100 lbf*ft 1.120 kgf*mt

3 inch.

3 ½ inch. 88,9 mm

75,4 lb 34,2 kg

77,8 mm1 16

160.000 lbf (+23%)*

(+52%)*

72.574 kgf

12.300 lbf*ft 1.700 kgf*mt


52 kg

Size and Weight HMO (HEAVY DUTY)Imperial Metric Imperial Metric

HO



19 Unit Rod Bundle

Hexagonal Steel Cap

Heat Treatment

Thread Treatment





Packing

ThreadThread hardness

Joint tensile strength

Threaded joint torque strength

Outer Diameter


Inner Diameter


Linearity (Pipe/Thread)

Thread Profile

690 Mpa (100.000 PSI)

813 Mpa (118.000 PSI)

1 mm x 3 Meters (Max.)

3 TPI (Threads per inch)



Raw Material




2,5 TPI (Threads per inch)


P

4 ½ pulg.

4 pulg.

104 lb

114,3 mm

101,6 mm

52 kg

Raw Material




Minimun 690 Mpa (100.000 PSI)

Minimun 813 Mpa (118.000 PSI)

Dureza de la Rosca

52 kg

Heat Treatment

Thread TreatmentPin End / Applying phosphate coating that reduces friction and improvesgrease retention screw.


Both ends are heat treated (Hardening and Tempering), pre-thread (4” to 6” approx.)

Size and Weight DimensionsImperial Metric

Linearity (Pipe/Thread) 1 mm x 3 Meters (Max.)

Rosca




Packing


Outer Diameter


Inner Diameter

7 Unit Rod Bundle

Hexagonal Steel Cap


CASING HWT

4 ½ inch

4 inch

104 lb

114,3 mm

101,6 mm

52 kg

Materia Prima

Limite elástico (Tubo)

Resistencia de tracción (Tubo)

Seamless precision pipe, hot roller ASTM A519 steel high alloy

Minimo 690 Mpa (100.000 PSI)

Minimo 813 Mpa (118.000 PSI)

Dureza de la Rosca

52 kg

Full body heat treatment (Hardening and Tempering).

Linealidad (Tubo/Rosca) 1 mm x 3 Metros (Max.)

Rosca 2,5 TPI (Hilos por pulgada)

Tratamiento Térmico Templey Revenido


Outer Diameter


Inner Diameter

7 Unit Rod Bundle

Hexagonal Steel Cap



Heat Treatment

Thread Treatment

Size and Weight Dimensions




Packing


Strict raw material control at reception to assure the use of materials that conform to our specifications. These controls check mechanical properties and chemical composition of our standard.

Metal microstructure control using metallographic analysis.

NDT (non-destructive testing) applied to 100% of production to guarantee a crack and fissure-free product.

Dimensional and geometrical inspection of threads with certified patterns.

QUALITY CONTROLS /ASTM Test

0UR PRODUCTS

DIAMOND PRODUCTS

CORER BARRELS

INJECTION HEADS

REVERSE AIR BARS AND ACCESSORIES

SOIL ASSESSMENT ACCESSORIES AND TOOLS

ACCESSORIES AND SPECIAL TOOL DESIGN / MANUFACTURING

SPARE PARTS AND ACCESSORIES FOR MACHINES


Lo Campino 432 / Quilicura / Santiago / Chile +56 (2) 2620 7808

Av. Santa Ana 180 / Ate Vitarte / Lima - Perú +51 (1) 326 0494

www.diamantinachristensen.com

REV.

MAR

.201

6

Documents

DCT - Drill Rods & Casing - Eng OK · 2019. 2. 27. · DIAMANTINA CHRISTENSEN 2 DRILL RODS & CASING. 90 ... • When stacking rods on the mast, place a wooden base or a rubber support