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.
Type:
Grant
Filed:
September 7, 2020
Date of Patent:
June 4, 2024
Assignees:
CNPC BOHAI DRILING ENGINEERING COMPANY LIMITED, CHINA NATIONAL PETROLEUM CORPORATION, CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)
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.
Type:
Application
Filed:
September 7, 2020
Publication date:
July 20, 2023
Applicants:
CNPC BOHAI DRILING ENGINEERING COMPANY LIMITED, CHINA NATIONAL PETROLEUM CORPORATION, CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)