Drill Collar

Size：2-7/8” – 14”                      

Length ：30Ft   /   31Ft   /   43Ft

The surface finish of slick drill collar  shall be hot-rolled and mill –finished.

Spiral drill collar is to do slot turning outside the surface. Spiral groove on drill collar ‘s OD make the  drilling fluid evenly,   equal pressure,   with less differential pressure sticking.

JSH can provide optional  slip and elevator groove to improve operation efficiency and safety. Cold-roll the upper radius to increase product life.  Slip and elevator groove can be used together or separately.  Unless otherwise specified,   slip and elevator groove will  be processed according to API RP7G (Latest version).