Natural gas hydrate pressure-retaining corer

US10837247B2 · kind B2 · utility

Assignee

• GUANGZHOU MARINE GEOLOGICAL SURVEY · CN

Inventors

• Xuwen Qin · 流花街道, CN
• Qiuping Lu · 流花街道, CN
• Jianliang Ye · 流花街道, CN
• Haijun Qiu · 流花街道, CN
• Jingan Lu · 流花街道, CN
• Beibei Kou · 流花街道, CN
• Yanjiang Yu · 流花街道, CN
• Fangfei Huang · 流花街道, CN
• Zenggui Kuang · 流花街道, CN
• Zhigang Zhang · Hunan, CN
• Jiangong WEI · 流花街道, CN

Key dates

• Filing date: May 30, 2019
• Grant date: Nov 17, 2020
• Expiry date: May 30, 2039

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E21B2200/04
• WIPO field: Civil engineering
• WIPO sector: Other fields

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.