Customized drill collars for trouble-free performance
Because drill collars are the most common components of BHAs and the most essential to overall performance, DRILCO manufactures them to specifications more stringent than API requirements. The care that we take in materials specification, heat treatment, machining, and inspection is reflected in the performance of every DRILCO drill collar.
Standard features include
conformance to API Specification 7-1, NS-1™, and individual customer specifications
rolled, milled, or machined surface finishes
285–341 BHN critical threaded section
ultrasonic testing after heat treating for quality assurance.
Optional features include
slip and elevator recesses to reduce handling time
API stress-relief groove to reduce fatigue caused by bending
spiral drill collars to mitigate differential sticking
hardbanding to decrease wear on collar OD.
For more specifications:
http://www.slb.com/services/drilling/tools_services/machining_inspection_tubulars_surface/tubulars_subs/premium_tubulars.aspx
Because drill collars are the most common components of BHAs and the most essential to overall performance, DRILCO manufactures them to specifications more stringent than API requirements. The care that we take in materials specification, heat treatment, machining, and inspection is reflected in the performance of every DRILCO drill collar.
Standard features include
conformance to API Specification 7-1, NS-1™, and individual customer specifications
rolled, milled, or machined surface finishes
285–341 BHN critical threaded section
ultrasonic testing after heat treating for quality assurance.
Optional features include
slip and elevator recesses to reduce handling time
API stress-relief groove to reduce fatigue caused by bending
spiral drill collars to mitigate differential sticking
hardbanding to decrease wear on collar OD.
For more specifications:
http://www.slb.com/services/drilling/tools_services/machining_inspection_tubulars_surface/tubulars_subs/premium_tubulars.aspx
