The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 02, 2024
Filed:
Sep. 30, 2020
China Petroleum & Chemical Corporation, Beijing, CN;
Sinopec Petroleum Engineering Technology Service Co., Ltd, Beijing, CN;
Sinopec Shengli Petroleum Engineering Co., Ltd, Dongying, CN;
Drilling Technology Research Institute of Sinopec Shengli Petroleum Engineering Co., Ltd, Dongying, CN;
Chuanwei Zhao, Dongying, CN;
Zhonghua Wu, Dongying, CN;
Yanjun Zhou, Dongying, CN;
Honglin Tang, Dongying, CN;
Zhihe Liu, Dongying, CN;
Xueliang Pei, Dongying, CN;
Haoyu Sun, Dongying, CN;
Zhenguo Su, Dongying, CN;
Bo Kang, Dongying, CN;
Hui Zhang, Dongying, CN;
Huangang Zhu, Dongying, CN;
Yongming Chen, Dongying, CN;
Zhongshuai Chen, Dongying, CN;
CHINA PETROLEUM & CHEMICAL CORPORATION, Beijing, CN;
SINOPEC PETROLEUM ENGINEERING TECHNOLOGY SERVICE CO., LTD, Beijing, CN;
SINOPEC SHENGLI PETROLEUM ENGINEERING CO., LTD, Dongying, CN;
DRILLING TECHNOLOGY RESEARCH INSTITUTE OF SINOPEC SHENGLI PETROLEUM ENGINEERING CO., LTD, Dongying, CN;
Abstract
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.