Dual-torque transmission concentric tube-following drilling tool

• Main Authors: LIU RUOLONG, ZHAO JIANQIN, WANG YONG
• Format: Patent
• Language: Chinese; English
• Published: 10.07.2013
• 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 discloses a dual-torque transmission concentric tube-following drilling tool. The problems of low transmitted torque, difficulty in machining and short service life of the conventional drilling tool are solved. A centralizer (1) is provided with two holes parallel to an axis, and t...