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Drill Collar
Product Introduction
As an important part of drill string, drill collar can supply the drill bit and increase the rigidity of drill string. drill collar are manufactured strictly according to API Spec7-1 standard with material of AISI 4145 Mod. We supplies slick drill collars, spiral drill collars etc. The size of drill collar we provides is from 3.1/8 to 11 inches. also we can provides other drill collars at customers' specific request can be available.
Product Details

First class equipment could guarantee the whole process flow and the clave process be more efficient like heat treating and friction welding.

Meet the international requirement of the API 5DP, API 7G, & ISO 9001;

Advanced and strict inspection instruments could guarantee the high quality product with the performance more stable.

Specifications
Item Name Spiral or Slick O.D I.D Tool joint Bevel diameter in Material Overall length
in in Connection ft
1 Drill collar Slick or Spiral 3.1/8 1.1/4 NC26 2.3/8"IF 3 4145H 30 or 31
2 Drill collar Slick or Spiral 3.1/2 1.1/2 NC26 2.3/8"IF 4145H 30 or 31
3 Drill collar Slick or Spiral 4.1/8 2 NC31-41 2.7/8"IF 3.61/64 4145H 30 or 31
4 Drill collar Slick or Spiral 4.3/4 2 NC35-47 4.33/64 4145H 30 or 31
5 Drill collar Slick or Spiral 5 2.1/4 NC38-50 3.1/2"IF 4.49/64 4145H 30 or 31
6 Drill collar Slick or Spiral 6 2.1/4 NC44-60 5.11/16 4145H 30 or 31
7 Drill collar Slick or Spiral 6 2.13/16 NC44-60 5.11/16 4145H 30 or 31
8 Drill collar Slick or Spiral 6.1/4 2.1/4 NC44-62 5.7/8 4145H 30 or 31
9 Drill collar Slick or Spiral 6.1/4 2.13/16 NC46-62 4"IF 5.29/32 4145H 30 or 31
10 Drill collar Slick or Spiral 6.1/2 2.1/4 NC46-65 4"IF 6.3/32 4145H 30 or 31
11 Drill collar Slick or Spiral 6.1/2 2.13/16 NC46-65 4"IF 6.3/32 4145H 30 or 31
12 Drill collar Slick or Spiral 6.3/4 2.1/4 NC46-67 4"IF 6.9/32 4145H 30 or 31
13 Drill collar Slick or Spiral 7 2.1/4 NC50-70 4.1/2"IF 6.31/64 4145H 30 or 31
14 Drill collar Slick or Spiral 7 2.13/16 NC50-70 4.1/2"IF 6.31/64 4145H 30 or 31
15 Drill collar Slick or Spiral 7.1/4 2.13/16 NC50-72 4.1/2"IF 6.43/64 4145H 30 or 31
16 Drill collar Slick or Spiral 7.3/4 2.13/16 NC56-77 7.19/64 4145H 30 or 31
17 Drill collar Slick or Spiral 8 2.13/16 NC56-80 7.31/64 4145H 30 or 31
18 Drill collar Slick or Spiral 8.1/4 2.13/16 6.5/8"REG 7.45/64 4145H 30 or 31
19 Drill collar Slick or Spiral 9 2.13/16 NC61-90 8.3/8 4145H 30 or 31
20 Drill collar Slick or Spiral 9.1/2 3 7.5/8"REG 8.13/16 4145H 30 or 31
21 Drill collar Slick or Spiral 9.3/4 3 NC70-97 9.5/32 4145H 30 or 31
22 Drill collar Slick or Spiral 10 3 NC70-100 9.11/32 4145H 30 or 31
23 Drill collar Slick or Spiral 11 3 8.5/8"REG 10.1/2 4145H 30 or 31
Note: If the cliente has any special requerimente, for example compound,cold rolling,make and break,hard banding (ARNCO 100XT ARNCO 300XT etc), internal coating (TK34 TK34PTC2000, etc),Stress- Relief Pin, Bored  Back Box,Elevator Recess, slip Recess please feel free to contact us.