API drilling rig tools Spiral oilfield drill collar
Spiral drill collar
Elevator groove and slip groove made on box thread face of slick drill collar or spiral drill collar can be used as lifting sub and safety slip when trip out. The technical parameters for elevator groove and slip groove is as per API spec 7-1 .Hard banding is optional at customers request. Technical specification and parameters.
Drill collar ranges O.D. (mm)
Elevator groove depth(mm)
Elevator groove length(mm)
Slip groove depth(mm)
Slip groove length(mm)
Spiral drill collar,drill collar,drilling collar.
Packaging & Shipping
The company follows a business idea that is based on high quality to persue survival,development and enhanced efficiency so as to make customers satisfied ever and forever.
Focusing on technology,persuing high quality,and implementing brand strategies.Abiding by contracts and making continuous progress and enhancing customers’ satisfaction.Quality Inspection The Quality Control Center is equipped with advanced precise quality testing instruments