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:
Sep. 19, 2023
Filed:
Nov. 12, 2018
Shenzhen University, Guangdong, CN;
Sichuan University, Sichuan, CN;
Heping Xie, Sichuan, CN;
Ling Chen, Sichuan, CN;
Mingzhong Gao, Sichuan, CN;
Jun Guo, Sichuan, CN;
Zhilong Zhang, Sichuan, CN;
Zetian Zhang, Sichuan, CN;
Yiqiang Lu, Sichuan, CN;
Cong Li, Sichuan, CN;
Zhiqiang He, Sichuan, CN;
SHENZHEN UNIVERSITY, Guangdong, CN;
SICHUAN UNIVERSITY, Sichuan, CN;
Abstract
A core barrel sealing structure includes a core barrel, a drilling machine outer barrel, a chain mail-type flap valve and a trigger mechanism. The flap valve includes a valve seat and a chain mail-type valve flap. The trigger mechanism includes a trigger inner barrel and a trigger block. The trigger block is arranged in a through hole in a sidewall of the trigger inner barrel, and an inner wall of the drilling machine outer barrel is provided with a recessed opening adapted to the trigger block. When the core barrel is located in the valve seat, the valve flap is opened by 90° and is located between the trigger inner barrel and the drilling machine outer barrel. When the core barrel is lifted upwards, the valve flap returns to a top face of the valve seat to make sealing contact with a sealing face of a valve opening.