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:
Jun. 04, 2024
Filed:
Sep. 07, 2020
Cnpc Bohai Driling Engineering Company Limited, Tianjin, CN;
China National Petroleum Corporation, Beijing, CN;
China University of Petroleum (East China), Shandong, CN;
Jinshan Ma, Tianjin, CN;
Baojiang Sun, Shandong, CN;
Jintao Qi, Tianjin, CN;
Liming Wei, Tianjin, CN;
Fengliang Xi, Tianjin, CN;
Gang Liu, Tianjin, CN;
Zhiyuan Wang, Shandong, CN;
Xing Wang, Tianjin, CN;
Haichao Xu, Tianjin, CN;
Long Ma, Tianjin, CN;
Jiacui Luan, Tianjin, CN;
Lei Chen, Tianjin, CN;
Guodong Chen, Tianjin, CN;
Yuanlin Zhao, Tianjin, CN;
Zisen Yang, Tianjin, CN;
Qiang Huang, Tianjin, CN;
Menglei Ma, Tianjin, CN;
Xiantao Meng, Tianjin, CN;
Hongyin Wei, Tianjin, CN;
CNPC BOHAI DRILING ENGINEERING COMPANY LIMITED, Tianjin, CN;
CHINA NATIONAL PETROLEUM CORPORATION, Beijing, CN;
CHINA UNIVERSITY OF PETROLEUM (EAST CHINA), Shandong, CN;
Abstract
A pressure compensation device with an accumulator group for controlled pressure drilling includes an electrical flat valve, a check valve, an accumulator group, a flanged pup joint and a support base. The electrical flat valve is connected to the check valve and is mounted on a top surface of the support base. The accumulator group mounted on the whole support base is a pre-storage pressure compensation device for controlled pressure drilling, and is located at a downstream position of the check valve. The liquid inlet end of the accumulator group is connected to the check valve, and the liquid discharge end is connected to the flanged pup joint.