Non Magnetic Drill Collar

What is Non Magnetic Drill Collar(NMDC)? What its function of Non-magnetic Drill collars?

Non-magnetic drill collars are made of a low-carbon, high-chromium-manganese alloy steel. They are refined through strict chemical composition ratio and forged to achieve their mechanical properties.

Non-mag drill collars function as housing for the MWD tools, while at the same time provide the weight for drillstring. The Non-mag drill collars are suitable for all types of drilling including straight and directional applications.

Each drill collar is fully inspected by internal inspection dept. 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 recessed mill flats.

We can provide three type of non magnetic drill collar according to the customers’ order; include Slick, Spiral, and Flex Non-Mag Drill Collar.
Slick Non-Mag Drill Collar
Slick Non-Mag Drill Collar provide the required weight on bit, and will not interfere with the directional drilling ability.
Spiral Non-Mag Drill Collar
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-Mag Drill Collar
Flex Non-Mag Drill Collar 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.

Including the NMDC, we also supply other related Non-Magnetic Drill tools, including Non-magnetic stabilizer, Non-magnetic centralizer, Non-magnetic drill pipe, Non-magnetic short joint, and Non-magnetic drill pipe for the coal mine field. Surely, if clients need customized Non-magnetic drill tools, we are glad to customize.