Pressure compensation device with accumulator group for controlled pressure drilling

US12000222B2 · kind B2 · utility

Assignees

• CNPC BOHAI DRILING ENGINEERING COMPANY LIMITED · CN
• China National Petroleum Corporation · CN
• CHINA UNIVERSITY OF PETROLEUM (EAST CHINA) · CN

Inventors

• Jinshan Ma · Tianjin, CN
• Baojiang Sun · Shandong, CN
• Jintao Qi · Tianjin, CN
• Liming Wei · Nanchang, CN
• Fengliang Xi · Tianjin, CN
• Gang Liu · 红钢城街道, CN
• Zhiyuan Wang · Qingdao, CN
• Xing Wang · Tianjin, CN
• Haichao Xu · Tianjin, CN
• Long Ma · Boulder, US
• Jiacui Luan · Tianjin, CN
• Lei Chen · Chengdu, CN
• Guodong Chen · Tianjin, CN
• Yuanlin Zhao · Tianjin, CN
• Zisen Yang · Tianjin, CN
• Qiang Huang · Austin, US
• Menglei Ma · Tianjin, CN
• Xiantao Meng · Tianjin, CN
• Hongyin Wei · Tianjin, CN

Key dates

• Filing date: Sep 7, 2020
• Grant date: Jun 4, 2024
• Expiry date: Mar 19, 2041

Classification

• Technology area (CPC G): Physics
• CPC primary: G05D16/16
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

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.