Cnpc Engineering Technology R&d Company Limited

China National Petroleum Corporation

Wanjun Li

Tao Jia

Mingjie Lv

Hongwei Yin

Huijuan Guo

Jianli Wang

Binggui Xu

Yongliang Yu

Zhitong Liu

Quanli Zhang

Yingjie Zhu

Gang Wang

Chen Wang

Guodong Zhan

Gang Chen

Jianhua Guo

Fei He

Fei Han

Fuxiang Hou

Guojun Liu

Zhijian Hu

Shaohua Zhou

Mingmin He

Depei Shi

Disclosed are an expansion tool assembly, comprising: an expandable tubular; a guide shoe partially inserted into and connected to the lower end of the expandable tubular; a sealing sleeve arranged in the expandable tubular and connected to the upper end of the guide shoe; an expansion assembly comprising an expansion cone and expansion seat disposed inside the expandable tubular, wherein the lower end of the expansion seat is connected with hooks, which can be rested on the upper end of the sealing sleeve; an upper joint that is connected to the upper end of the expansion seat and can be connected to a drill string. A force transfer path can be established via connection between the expansion seat and sealing sleeve, so that expandable tubular weight is borne on the drill string. Unintentional expansion of the expandable tubular, caused by interaction between expandable tubular and expansion cone, can be avoided.

Expansion tool assembly for expandable tubular

The present invention discloses an expandable liner hanger system comprising a central pipe and an expandable pipe, with an expansion cone provided therebetween the central pipe and expandable pipe in a way that the expansion cone is movable along the central pipe, so that the expandable pipe is expanded; wherein, the expansion cone comprises an expansion cone seat move along the central pipe, and an expansion cone sleeve fitted over the expansion cone seat, the connection between the expansion cone seat and the expansion cone sleeve is configured in a way that the expansion cone sleeve can move upward together with the expansion cone seat along the central pipe so that the expandable pipe is expanded, and the central pipe can drive the expansion cone seat to disengage from the expansion cone sleeve.

Expandable liner hanger

Growing community of inventors

Beijing, China

Wanjun Li