Drill Collar

Drill collars are thick wall tubulars machined from solid steel bars. As an integral part of the drill string, they provide weight-on-bit to improve drilling performance. The heavy weight of the drill collars increases the downward force on the bit to provide maximum efficiency in breaking down the formation.

We can supply slick drill collars, spiral drill collars and non-magnetic drill collars in AISI 4145H-modified steel. Material suitable for use in sour service applications can also be supplied on request.