Drill Collar
We can produce:
A, Normal Drill Collar
B, Spiral Drill Collar with spiral, elevator, slip grooves
C, Short Drill Collar
Features
2, Proprietary designed intermediate frequency heat treatment technique to make full-length heat treating so improve the service life.
3, Complete examination methods such as UT, MT is applied to examine out any flaw that guarantee the flawless products.
4, Modified machine is applied to bore the inner bore one-off so that guarantee the smooth inner wall.
5, 5 axis CNC milling machine to precisely machine the spiral, elevator, slip grooves of the spiral drill collar.
You may choose or be advised:
1, Stress-relief groove
2, Hard banding
3, Cold rolled thread roots.
More Details can be obtained by intlmarketing@hueic.com or www.hueic.com