China National Petroleum Corporation

Cnpc Engineering Technology R&d Company Limited

Yi Tian

Qiang Li

Xue Wang

Tao Jia

Peng Kang

Mingjie Lv

Hongwei Yin

Zhitong Liu

Huijuan Guo

Binggui Xu

Jianli Wang

Aiguo Wang

A mechanical and hydraulic dual-effect expansion device for well drilling with expandable tubular technology includes an anchor having a lower end connected to an upper end of an insertion connection tube via a coupling, a hydraulic cylinder assembly comprising a hydraulic cylinder and a piston tube movably disposed within an inner cavity of the hydraulic cylinder, and a variable-diameter expansion cone assembly comprising a sealing cone portion and a variable-diameter expansion cone portion, wherein the sealing cone portion has an upper end connected to a lower end of the piston tube and a lower end connected to an upper end of the variable-diameter expansion cone portion. The mechanical and hydraulic dual-effect expansion device can facilitate completion of construction operations of an expandable tubular in a casing and an openhole system.

Mechanical and hydraulic dual-effect expansion device for well drilling with expandable tubular technology

Growing community of inventors

Beijing, China

Yi Tian