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:
Feb. 11, 2025
Filed:
Jan. 26, 2021
Sichuan University, Sichuan, CN;
Mingzhong Gao, Sichuan, CN;
Ling Chen, Sichuan, CN;
Jianan Li, Sichuan, CN;
Cong Li, Sichuan, CN;
Zhiqiang He, Sichuan, CN;
Le Zhao, Sichuan, CN;
Mingqing Yang, Sichuan, CN;
Nianhan Wu, Sichuan, CN;
Bo Yu, Sichuan, CN;
SICHUAN UNIVERSITY, Sichuan, CN;
Abstract
An internal blowout-prevention gas-retaining connector has a body mounted at the bottom of a drill pipe. The body includes a valve pipe section and a connecting pipe section arranged from top to bottom. The bottom of the valve pipe section is inserted into the top of the connecting pipe section. The blowout-prevention valve seat is provided at a bottom end of the valve pipe section while a blowout-prevention valve bonnet is provided on a bottom surface of the valve pipe section. The edge of the blowout-prevention valve bonnet is rotatably connected to a bottom surface edge of the valve pipe section. A torsion spring is provided on a bottom surface of the blowout-prevention valve bonnet. One end of the torsion spring is connected to the bottom surface of the blowout-prevention valve bonnet while the other end is connected to the inner wall of the connecting pipe section.