spiral drill collar
Caroline zhang
![Caroline zhang]()
Caroline zhang
Drill Pipe, Drill Collar, HWDP Manufacturer From China Mob/WhatsApp: +86 19930727857
8'' spiral drill collar, 2 13/16'' inner diameter, 6 5/8Reg, 31 feet long!
One joint weights about 2.1 tons.
Spiral drill collars are special drill collars. Spiral drill collars are made by processing three or nine right-hand spiral grooves on the cylindrical surface of the drill collar to reduce the contact area with the well wall and the rotation resistance. Spiral drill collars can effectively prevent pressure difference and drill sticking, improve drilling efficiency and drilling safety, and have the same specifications and dimensions as ordinary drill collars.
Email: [email protected]
WhatsApp: +86 19930727857