Drill Collar Protector 6-5/8 Reg. Pin
REG PIN protector is used for Drill collars thread protection,The drill collar are generally divided into three types: spiral drill collars, nonmagnetic drill collars, and integral drill collars.
The overall drill collar is a smooth, thick walled circular pipe with connection threads machined at both ends.
Spiral drill collars are machined with three right-handed spiral grooves on the outer cylindrical surface of the circular drill collar to reduce the contact area with the borehole wall and effectively prevent differential pressure sticking
