Composite mono-cone bit with inner cone

• Main Authors: LIN MIN, REN HAITAO, CHEN LIAN, ZHANG WEIFENG, ZHOU CHUNXIAO, YANG YINGXIN
• Format: Patent
• Language: Chinese; English
• Published: 11.06.2014
• 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 composite mono-cone bit with an inner cone, and belongs to the technical field of drilling equipment for oil and gas engineering, mining engineering, building foundation construction, geological engineering, hydrological engineering and the like. The composite mono-cone bit with the inner cone comprises a drill bit body (1), a cone (2) and a cone front fixed cutting structure (3), wherein cone cutting teeth (5) are arranged on the cone (2); fixed cutting teeth (6) are arranged on the cone front fixed cutting structure (3); a shaft journal (4) is arranged on the drill bit body (1); the cone (2) is rotationally connected with the shaft journal (4); the cone front fixed cutting structure (3) is fixedly connected with the front end of the shaft journal (4); the inner cone (31) is arranged on the cone front fixed cutting structure (3). Through the adoption of the composite mono-cone bit with the inner cone, the service life of the drill bit can be prolonged and the working stability o