Anti-torque drill collar for petroleum drilling

• Main Authors: FENG SHAOBO, WANG ZHONGSHENG, LU QIANG, HU FANGTING, MING CHUANZHONG, XIE JULIANG, CHEN JIALEI, SUN JIJUN
• Format: Patent
• Language: Chinese; English
• Published: 30.03.2011
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The utility model relates to an anti-torque drill collar for petroleum drilling, which is applied to the technical field of petroleum drilling. One end of a drill collar body is provided with an outer threaded end, the other end of the drill collar body is provided with an inner threaded end, the outer threaded end of the drill collar body is processed with outer screw threads, and the roots of the outer screw threads are provided with outer shoulders; and the inner threaded end of the drill collar body is processed with inner screw threads, and the bottoms of the inner screw threads are provided with inner shoulders. The outer threaded end and the inner threaded end of the anti-torque drill collar are screwed and connected by the screw threads. The vertical distance from the outer shoulders of the outer threaded end to the lower end face of the outer threaded end is 0.3 to 0.5mm smaller than the vertical distance from the inner shoulders of the inner threaded end to the upper end face of the inner threaded e