Ye Jiao

Xiangchao Shi

Zhaowei Wang

Zonglin Lyu

Rongrong Wang

Shuai Chen

Yun Zhuo

Maoping Gao

A design method and system for a cutting structure of a PDC drill bit with spiral blades is provided, including carrying out uniaxial and triaxial compressive strength tests on outcrops or underground cores to obtain rock mechanical parameters; establishing a three-dimensional cutting structure of the PDC drill bit based on an archimedean spiral and front and rear row teeth of the PDC drill bit; establishing a bit-rock finite element model based on the rock mechanical parameters and the three-dimensional cutting structure of the PDC drill bit; obtaining a time history curve for weight-on-bit and torque-on-bit based on the bit-rock finite element model; establishing a design scheme for the cutting structure of the PDC drill bit based on the time history curve; and obtaining the cutting structure of PDC drill bit with spiral blades based on the design scheme for the cutting structure of the PDC drill bit.

Method and system for cutting structure of PDC drill bit with spiral blades

A bit cutting structure and a PDC bit for highly abrasive formations are provided. The PDC bit includes A-type cutting structures, B-type cutting structures and a bit body. The A-type cutting structures and the B-type cutting structures each include a front-row integrated compact and a rear-row conical tooth. Blades are arranged on the bit body, and conventional independent compacts are arranged on each blade. The A-type cutting structures and the B-type cutting structures are arranged on the blades. Each blade is provided with a front-row tooth position and a rear-row tooth position, and the front-row integrated compact and the rear-row conical tooth are respectively arranged on the front-row tooth position and the rear-row tooth position.

Bit cutting structure and PDC bit for highly abrasive formations

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Chengdu, China

Ye Jiao