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:
Nov. 17, 2020
Filed:
May. 30, 2019
Guangzhou Marine Geological Survey, Guangzhou, CN;
Xuwen Qin, Guangzhou, CN;
Qiuping Lu, Guangzhou, CN;
Jianliang Ye, Guangzhou, CN;
Haijun Qiu, Guangzhou, CN;
Jingan Lu, Guangzhou, CN;
Beibei Kou, Guangzhou, CN;
Yanjiang Yu, Guangzhou, CN;
Fangfei Huang, Guangzhou, CN;
Zenggui Kuang, Guangzhou, CN;
Zhigang Zhang, Guangzhou, CN;
Jiangong Wei, Guangzhou, CN;
Guangzhou Marine Geological Survey, Guangzhou, CN;
Abstract
A natural gas hydrate pressure-retaining corer includes an outer tube assembly and an inner tube assembly installed inside the outer tube assembly. The inner tube assembly includes a first inner tube assembly and a second inner tube assembly. The first inner tube assembly includes a spearhead, a latching device, a suspension plug, a hydraulic piston tube, a piston short limit short section, a limit copper pin, a sealing head, a middle tube, a weight tube drive mechanism and a pressure-retaining ball valve closing sealing mechanism which are sequentially connected from top to bottom. The second inner tube assembly includes a piston compensation balance mechanism, a single-action mechanism, an accumulator mechanism, a sealing mechanism and a core barrel connected sequentially from top to bottom.