Drill Collar
Category:
Drilling & Exploration
Browse number:
3
Number:
Release time:
2026-06-22 12:05:34
API standard drill collar is a core downhole drilling tool manufactured in full compliance with API Spec 7-1 international industry standards, serving as the fundamental component of the bottom hole assembly (BHA) in oil, gas, and geothermal drilling operations. Installed at the lowest section of the drill string above the drill bit, the drill collar features an ultra-thick wall structure, high rigidity, and superior unit weight compared with ordinary drill pipes, enabling it to provide stable and accurate bit weight during drilling processes. Its primary function is to apply precise downward pressure to the drill bit, keep the upper drill pipe in a continuous tension state, effectively prevent drill string bending and vibration, stabilize borehole trajectory, and reduce drilling deviation, which greatly improves drilling accuracy and overall construction efficiency.