China Petroleum Chemical Corporation

Sinopec Southwest Oil & Gas Company

Jianfa Ci

Tao Liu

Chen Chen

Zhimin Hou

Jiang Qian

Qiang Wang

Dan Hu

Yijun Zhou

Wenfeng Pang

Wenjiang Teng

A sliding sleeve device has an outer cylinder, a circulation hole being provided in the wall of the outer cylinder; and an inner cylinder provided in an inner cavity of the outer cylinder. In an initial state, the inner cylinder and the outer cylinder are fixed to each other to seal the circulation hole. In a first state, the inner cylinder is movable relative to the outer cylinder, thereby unsealing the circulation hole. A protection mechanism is provided in the circulation hole, which has an inner member located on the radially inner side and an outer member located on the radially outer side.

Sliding sleeve device

Growing community of inventors

Sichuan, China

Jianfa Ci