API Drill Collar

1. API Drill Collar, as the main component of BHA, is at the bottom of drill string. It has the features of thick wall thickness, great gravity, and stiffness.
2. Regular API Drill Collar materials: 4145H or 4145H MOD
3. Regular API Drill Collar is A type (Slick drill collar)
4. Optional Structure : elevator groove, slips groove, stress groove, and hard-banding
5. Production standard: API 7-1, API7-2 and NS-1

Why Choose Our API Drill Collar?

1. With the sufficient hole-drilling and digital control machines, greatly meet the production requirement.
2. All raw materials are inspected well to ensure production performance qualification by the various laboratory machines. 
3. Our company, with strong development ability, can improve and design special structure as per user special need on the production standard basis. 
4. With special cold-rolling machines and break-up and break-out machines, our company can independently achieve thread, stress relief groove, and thread running operations.

API Drill Collar Specification

1. Provide the API drill collar’s specification: O.D (specification)
2. Provide the overall length (if non-standard)
3. Provide the inner bore size (if non-standard)
4. Provide connection type and model: thread type and whether have stress groove or not, bench mark or choosing low torque structure. 
5. Whether have the elevator groove, slips groove, hard-banding or undercoat (Optional)
6. Whether have thread, and have the shackle requirements of stress relief groove cold rolled stress or thread；