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We supply API certified oilfield drilling rigs, workover rigs, drawworks, wire rope, drill line, DC motor, AC motor, YM Hydranlic Catheads, ZP series rotary table, hydraulic winches, air winches, hydraulic power units, rotary hoses, crown block, sheave, traveling block, hooks, deadline anchor, top drive spare parts, drill pipe elevator, casing elevator, drill collar elevator, tubing elevator, sucker rod elevator, slip type elevator, single joint elevator, SE spider, links, perfection link, manual tong, casing tong, dies, power slip, manual slip, Kelly bushing, iron roughneck, power tong, hydraulic power tong unit, Kelly spinner, ram BOP, annular BOP, diverter, BOP control system, BOP control line, Conflex hose, spacer spools, adapter spools, double studded adapter flanges, drilling spool, choke and kill manifold, gate valves , butterfly valves, shale shakers, screens, desander, Centrifugal pumps, Vacuum degassers, Mud cleaners, Desilters, Shearing pumps, Centrifuges, Agitators, Mixing pumps, Poorboy degasser/Mud gas separator, screw pump, Venturi hopper, Submersible slurry pump, Flare igniter, Mud gun, Mud tanks, F-Series Triplex Mud Pump, 3NB Series Triplex Mud Pump, Unitized Mud Pump Package, Mud pump Spare parts such as Discharge Filter Assembly, Clamp of Mud Pump, Piston Assembly, Cylinder Head and Valve Cover, Guide plate, Plug Board Assembly, Air chamber assembly, Shear Relief Valve, Liner of Mud Pump, Cross Head of Mud Pump and Other parts Liner hanger, Cement head, Float collar and float shoe, Cementing plug, Casing Packer, Casing Centralizer, Mill shoe, Stop collar, Double pump cementing units, fracturing pumping units, Completion tools, pumping units, sucker rods, sucker rod pumps, screw pumps, submersible motors, X-mas tree, tubings, drill pipes, drill collars, heavy weight drill pipes, Kelly, stabilizers, drilling jars, bit subs, X-over subs, hole openers, casing and tubing drifts, casing scrapers, drilling instrument and electrical System, oilfield camp houses, drilling instrumentation and electrical system. Please send email to us if you need any information.
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Drill Collar

The Drill Collars are made of AISI 4145 H or 4145 H Modified alloy steel  Bores are trepanned from one direction with no mismatch  All drill collars are heat-treated with hardness within 285 to 341 BHN, which are guaranteed one inch below the surface of the pipe
When inquiry or order, please specify:
- Type (slick or spiral grooved)
- Outside and inside diameters and overall length
- Connection size and type
- API Stress relief groove on pin and box ends
- Cast or pressed steel thread protectors
- Elevator recess or not
- Hard-banding or not
- Non-magnetic or

DATA SHEET FOR SLICK TYPE DRILL COLLAR

Size (in)

Bore (in)

Connection

Weight (lb)

Size (in)

Bore (in)

Connection

Connection

30 ft

31 ft

30 ft

31 ft

3 1/8

1 1/4

NC23

651 2

673 2

6 3/4

2 1/4

4IF

3132 8

3207 6

3 1/4

1 1/4

NC23

715

739 2

7

2 13/16

41/2IF

3258 2

3366

3 1/2

1 1/2

2 3/81F

787 6

814

7 1/4

2 13/16

41/2IF

35354

3654 2

4 1/8

2

2 7/81F

1031 8

1067

7 1/2

2 13/16

41/2IF

3830 2

3957 8

4 1/4

2

2 7/81F

1119 8

1157 2

7 3/4

2 13/16

6 5/8 Reg

4129 4

4268

4 1/2

2

2 7/81F

1287

1331

8

2 13/16

6 5/8 Reg

4439 6

4587

4 3/4

2 1/4

NC35

1383 8

1430

8 1/4

2 13/16

6 5/8 Reg

4769 6

4928

5

2 1/4

31/21F

1575 2

1628

8 1/2

2 13/16

6 5/8 Reg

5093

5262 4

5 1/4

2 1/4

3 1/21F

1784 2

1843 6

8 3/4

2 13/16

6 5/8 Reg

5440 6

5621

5 1/2

2 1/4

31/21F

1991

2057

9

3

7 5/8 Reg

5695 8

5885

5 3/4

2 1/4

4FH

2219 8

2294 6

9 1/4

3

7 5/8 Reg

6067 6

6270

6

2 1/4

NC44

2450 8

2532 2

9 1/2

3

7 5/8 Reg

6430 6

6644

6 1/4

2 1/4

41F

2692 8

2783

9 3/4

3

7 5/8 Reg

6815 6

7040

6 1/2

2 1/4

41F

2948

3047

10

3

8 5/8 Reg

7207 2

7447


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