The Non-magnetic drill collars function as a housing for the MWD tools, while at the same time provide the weight for drill string. TIANHE Non-magnetic drill collars are suitable for all types of drilling including straight and directional applications. Each drill collar is fully inspected by our internal inspection department.All data obtained are recorded on the inspection certificate furnished with each drill collar. API monogram, serial number, OD, ID, type and size of connections are stamped on the recessed mill flats. We manufacture three type of non-magnetic drill collars according to the customers’ order; include Slick, Spiral, and Flex Non-magnetic drill collars.

Slick Non-magnetic drill collars

TIANHE Slick Non-magnetic drill collars provides the required weight on bit, and will not interfere with the directional drilling ability.

Spiral Non-magnetic drill collars

TIANHE Spiral Non-Mag Drill Collar is designed to allow greater flow area for drilling fluids, while providing the benefits of non-mag steel  for complex drilling programs.

Flex Non-magnetic drill collars

TIANHE Flex Non-magnetic drill collars is thinner and more flexible than standard drill collar. Their ability to make short radius turns, bend for high build angles, and pass through severe doglegs makes them ideal for use in directional and horizontal applications. Manufactured with non-mag steel, this drill collar is well suited for housing MWD equipment.