China Petroleum Chemical Corporation

Sinopec Petroleum Engineering Technology Service Co., Ltd.

Sinopec Shengli Petroleum Engineering Co., Ltd

Drilling Technology Research Institute of Sinopec Shengli Petroleum Engineering Co., Ltd.

Zhonghua Wu

Hui Zhang

Zhihe Liu

Huangang Zhu

Yanjun Zhou

Haoyu Sun

Bo Kang

Yongming Chen

Chuanwei Zhao

Zhongshuai Chen

Xueliang Pei

Honglin Tang

Zhenguo Su

A flow splitting device for gas reverse circulation drilling, including: an upper joint for connecting with a double-wall drill pipe; an inner tube which is arranged in the upper joint and defines a first passageway in communication with an inner chamber of the double-wall drill pipe, a second passageway in communication with an annular space in the double-wall drill pipe formed between the inner tube and the upper joint; a lower joint, having an upper end fixedly connected with the upper joint and a lower end for connecting with a drill tool; and a flow guiding member provided between the upper joint and the lower joint. A flexible sealing mechanism is provided outside the upper joint. The flexible sealing mechanism extends radially outward relative to the upper joint and the lower joint to form a sealing contact with a wellbore wall.

Flow splitting device for gas reverse circulation drilling

Growing community of inventors

Dongying, China

Zhonghua Wu