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Rigs & Accessories -----
Onshore Drilling Rig
Onshore workover Rig
Rotary Table
Swivel
Travelling Block and Hook
Drilling Steel Rope
Top Drive
Rig motor
Drilling Hose
Air Winch
Rig Roller Chain

Mud pump & Fluid end parts
Triplex Single Acting Mud pump
Fluid end parts

Handling tools -----
Rotary Slips
Drill Collar Slips
Casing slips
Safety Clamp
BNC Type elevator
SSC Type Elevator
Slip type Elevator
Casing elevator spider
Sucker Rod elevator
Single Joint Elevator
Roller Kelly bushing
Master Casing Bushing
Casing Bushing
Manual tong
Power tong
Hydraulic cathead
Air Safety Spinning Wrench
Kelly Spinner

Solid control equipment ----
Solid Control Equipment

BOP and Accessories -----
BOP & ACCUMULATOR

Drilling Strings -----
Kelly
H-W Drill pipe
Drill Collar
Stabilizer
X-over Subs
drilling jar
Hole opener
Under reamer
Down Hole motor
Drill pipe

Fishing Tools -----
Safety Joint
Overshot
Spear
Reverse Circulating Junk Basket
Casing Scraper

Drilling Instruments -----

Flow control products -----
Gate valve
Butterfly valve
SPM Plug valve

Wellhead & X-mass -----
Wellhead & X-mass tree





 
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DRILL COLLAR

The Drill Collar is made of AISI 4145H or 4145 H modified Alloy Steel. Its bores are trepanned from one direction with no mismatch. All Drill Collars are Q & T overall length to ensure the hardness within 285 and 341 BHN with one inch below the surface.

The Physical Properties

OD (in)
Tensile Strength (Mpa)
Yield Strength (Mpa)
Elongation (L=4D) (%)
Impact AKV (J)
Brinell Hardness (HB)
3 1/8~6 3/4
Not less than 965
not Less than 758
Not less than 13
Not less than 54
Not less than 285
7~10
Not less than 930
Not less than 689
Not less than 13
Not less than 54
Not less than 285
Standard Sizes and Spec.
Size OD (in)
Bore ID (in)
Connection
Approx Weight (kg)
30 ft
31 ft
3 1/8
1 1/4
NC23
296
306
3 1/4
1 1/4
NC23
325
336
3 1/2
1 1/2
2 3/8IF
358
370
4 1/8
2
2 7/8IF
469
485
4 1/4
2
2 7/8IF
509
526
4 1/2
2
2 7/8IF
585
605
4 3/4
2 1/4
NC35
629
650
5
2 1/4
3 1/2IF
716
740
5 1/4
2 1/4
3 1/2IF
811
838
5 1/2
2 1/4
3 1/2IF
905
935
5 3/4
2 1/4
4FH
1009
1043
6
2 1/4
NC44
1114
1151
6 1/4
2 1/4
4IF
1224
1265
6 1/2
2 1/4
4IF
1340
1385
6 3/4
2 1/4
4IF
1024
1058
7
2 13/16
4 1/2IF
1481
1530
7 1/4
2 13/16
4 1/2IF
1607
1661
7 1/2
2 13/16
4 1/2IF
1741
1799
7 3/4
2 13/16
6 5/8Reg
1877
1940
8
2 13/16
6 5/8 Reg
2018
2085
8 1/4
2 13/16
6 5/8 Reg
2168
2240
8 1/2
2 13/16
6 5/8 Reg
2315
2392
8 3/4
2 13/16
6 5/8 Reg
2473
2555
9
3
7 5/8 Reg
2589
2675
9 1/4
3
7 5/8 Reg
2758
2850
9 1/2
3
7 5/8 Reg
2923
3020
9 3/4
3
7 5/8 Reg
3098
3200
10
3
8 5/8 Reg
3276
3385

Order Instructions:

  • Type (Slick or Spiral grooved)
  • Outside and inside size and overall length
  • Connection type and size
  • API Stress relief Groove on pin and box ends
  • Cast or pressed steel thread protectors
  • other special request, for example: slips or elevator recess and hard banding style.

NON-MAGNETIC DRILL COLLARS

Materials of Non-magnetic Drill Collars are made from chrome manganese low carbon austenitic alloy with the following characteristics:

  • The chemical composition should be controlled strictly during the refining and forging process.
  • With excellent lower Magnetic permeability, high strength of mechanical properties and outstanding resistant to stress corrosion cracking and no tendency to galling.

Mechanical Properties
Size OD (in)
Yield Strength (Mpa)
Tensile Strength (Mpa)
Elongation (%)
Reduction of area (%)
Impact AKV (ft.lb)
3 1/8~6 3/4
not less than 758
not less than 827
not less than 18
50
not less than 50
7~10
not less than 689
not less than 758
not less than 20
50
not less than 50

Non-magnetic Properties

  • Relative Max: 1.010
  • Average: ≤1.005
  • Max. B ≤0.05 Micro Tesla/100 mm

Order Instructions

  • Size of Non-magnetic Drill Collar
  • Length
  • Connection Type
  • API Stress relief recess
  • other speical request.
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Tel:+86-21-5881-1945     


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Email:sales@mastpetroequip.com


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