TianHe - Non-Magnetic Drill Collar
TIANHE Non-magnetic Drill collars are made from Non-magnetic steel bars with low-strength by combining a proprietary chemical analysis and a rotary hammer forging process with low magnetic permeability excellent machine ability, it will not interfere with the specialized directional equipment and will enhance the performance of the drilling operation. Non-mag drill collars function as housing for the MWD tools, while at the same time provide the weight for drillstring. TIANHE 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.