China Petroleum Chemical Corporation

Sinopec Southwest Oil & Gas Company

Bsh Hausgerate Gmbh

Bsh Bosch Und Siemens Hausgerate Gmbh

Wenfeng Pang

Edwin Bolduan

Andreas Stolze

Jun Chen

Qi Zhang

Tao Liu

Jun Liu

Zhimin Hou

Chen Chen

Jiang Qian

Zhenwei Gan

Wei Zhao

Shunqu Hu

Qiang Wang

Yonggang Xu

Bin Qi

Yijun Zhou

Zhi Xie

Dan Hu

Wenjiang Teng

Michael Kozica

Jian Pan

Jianfa Ci

Jie Gao

Jierui Pang

Weiyi Zhang

Zhihua Yan

Huilong Feng

Shanliang Qian

Yanhong Chen

Harald MOSCHÜTZ

Hui Zhang

Jörg Ziegler

Yanglei Zhu

Henrik Birke

Min Wu

Dieter Schröder

Thomas Schneider

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

A sliding sleeve opening tool includes an engaging element, a ball seat and a guiding head connected in sequence, as disclosed herein. The engaging element includes at least two elastic pawls uniformly disposed in a circumferential direction and at least one engaging part disposed on an external circumferential surface of an elastic pawl, and the engaging element is further provided with a first fluid channel which runs through the engaging element. The ball seat is provided with a second fluid channel which runs through the ball seat, and within the second fluid channel a taper hole section for bearing a sealing ball is disposed, the second fluid channel being in communication with the first fluid channel. The guiding head is provided with a third fluid channel which runs through the guiding head, and the third fluid channel is in communication with the second fluid channel. The sliding sleeve opening tool has at least one of the pushing function, the fishing function, the pushing assistance function, the mud scraping function and the sealing function.

Tool for opening sliding sleeve

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Chengdu, China

Wenfeng Pang