Mining Bits

Materials:
Drill collars are manufactured from AISI 4145H modified steel, and are supplied in the "as rolled" surface finish condition. Alternative surface finishes are available.

Trepanning and Heat Treatment:
Drill collars are trepanned and drifted to API Spec 7-1.

Spiral drill collar are a kind of petroleum drilling tool series of our company. This kind of drill collar is capable of preventing differential pressure detention of tools during drilling. Spiral grooves will enable the mud to flow freely around the drill collar to use balance pressure to prevent the formation of obstruction so as to effectively prevent differential pressure jamming.

Non-magnetic drill collar are made of a kind of low-carbon high chrome-manganese alloy steel. They will achieve their mechanical performance via refining and forging on the basis of strict chemical constituent proportioning with outstanding low permeability, high level of mechanical performance, outstanding resistance to inter-granular corrosion and cracking, and strong wearability.