Specifications

1>standard:AISI 4145H and API Spec.7
2>Code:NCXX,IIF,REG
3>O.D:3 1/8 -11inch
4>I.D:1 1/4-3 inch

Usage: Drill collars are used to provide weight on bit so that drill pipes are kept in tension. Especially drill collars can keep drill bits centralized and hole track by large rigidity

Material: AISI 4145H, 4145H Mod and Non-magnetic material.

Standard: API Spec7, API Spec7-1 and SY/T Standard. ALSO WE CAN SUPPLY DS-1 and NS-1 STANDARD.

 

Type: Slick drill collar

      Spiral drill collar

      Non-magnetic material.

Hard band: Arnco100XT, Arnco200XT and Arnco300XT; Botn1000, Botn3000, TCS8000, TCS-Titanium, Armacor M etc. Also we can make according to customers’ requirements.

Size: OD: 3 1/8”~~11”; ID: 1 1/2”Min. Length:10’~~31’