Fidelity retaining type coring device for rock sample

US11781390B2 · kind B2 · utility

Assignee

• SHENZHEN UNIVERSITY · CN

Inventors

• Mingzhong Gao · Longbeilingcun, CN
• Heping Xie · Sichuan, CN
• Ling Chen · Lo Wu, CN
• Jianbo Zhu · Longbeilingcun, CN
• Cunbao Li · Longbeilingcun, CN
• Zhiyi Liao · Longbeilingcun, CN
• Zhiqiang He · Nanhu, CN
• Jun Guo · Sichuan, CN
• Cong Li · Longbeilingcun, CN

Key dates

• Filing date: Mar 15, 2019
• Grant date: Oct 10, 2023
• Expiry date: Oct 29, 2039

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E21B2200/05
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

A fidelity retaining type coring device for a rock sample, comprising a rock core drilling tool, a rock core sample storage barrel, and a rock core sample fidelity retaining cabin. The rock core drilling tool comprises a coring drilling tool, a core catcher (11), and an inner core pipe (12); the coring drilling tool comprises an outer core pipe (13) and a hollow drill bit (14), and the drill bit (14) is connected to the lower end of the outer core pipe (13); the lower end of the inner core pipe (12) extends to the bottom of the outer core pipe (13), and the inner core pipe (12) is in clearance fit with the outer core pipe (13); the rock core sample fidelity retaining cabin comprises an inner coring barrel (28), an outer coring barrel (26), and an energy accumulator (229); the outer coring barrel (26) is sleeved on the inner coring barrel (28); the upper end of the inner coring barrel (28) is communicated with a liquid nitrogen storage tank (225), and the liquid nitrogen storage tank (225) is located in the outer coring barrel (26); the energy accumulator (229) is communicated with the outer coring barrel (26); the outer coring barrel (26) is provided with a flap valve (23). Accordi…