Southwest Petroleum University

Chengdu Hairui Energy Technology Co., Ltd

Zhiming Shi

Lian Chen

Qin Wang

Yuchun Kuang

A fixed cutting structure-composite cone drill bit includes a drill bit body, a fixed cutting structure, and at least one cone. The cone and the fixed cutting structure are disposed on the drill bit body. The cone is rotatably connected to the drill bit body by means of a bearing structure. The distance from the outermost tooth or back cone of the at least one cone to the front side surface of the fixed cutting structure La&#x2264;&#x3c0;R/3, and the distance from the outermost tooth or back cone of the at least one cone to the rear side surface of the fixed cutting structure Lb&#x2264;&#x3c0;R/3. In the composite drill bit, the distance from the cone to the front/rear side surface of the fixed cutting structure is short, the gap between the cone and the fixed cutting structure is small, transition between cutting structure is smooth.

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Sichuan, China

Zhiming Shi