Title:
CORING DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/093414
Kind Code:
A1
Abstract:
A coring device, comprising a core drilling tool, a core catcher (6), a rock core barrel (1), a drilling machine outer cylinder (16), a flap valve (3) and an inner rod (2) for pulling the rock core barrel (1); the core catcher (6) is provided inside the lower end of the rock core barrel (1) , the core drilling tool comprises an outer core tube (5) and a hollow drill bit (4), the upper end of the outer core tube (5) being connected to the lower end of the drilling machine outer cylinder (16), and the lower end of the outer core tube (5) being connected to the drill bit (4); the lower end of the inner rod (2) protrudes into the rock core barrel (1) and is movable axially by a certain distance relative to the rock core barrel (1), the flap valve (3) comprises a valve seat (31) and a sealing flap (32), the valve seat (31) being coaxially mounted on the inner wall of the drilling machine outer cylinder (16), and one end of the sealing flap (32) being movably connected to the outer sidewall of the upper end of the valve seat (31); when the rock core barrel (1) is located in the valve seat (31), the sealing flap (32) opens at 90 degrees; and when the rock core barrel (1) is lifted up to a certain height by means of the inner rod (2), the sealing flap (32) returns to the top surface of the valve seat (31) to be in sealing contact with the valve seat (31).
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Inventors:
XIE HEPING (CN)
GAO MINGZHONG (CN)
CHEN LING (CN)
LIAO ZHIYI (CN)
ZHANG ZHILONG (CN)
ZHANG ZETIAN (CN)
LU YIQIANG (CN)
LI CONG (CN)
HE ZHIQIANG (CN)
GAO MINGZHONG (CN)
CHEN LING (CN)
LIAO ZHIYI (CN)
ZHANG ZHILONG (CN)
ZHANG ZETIAN (CN)
LU YIQIANG (CN)
LI CONG (CN)
HE ZHIQIANG (CN)
Application Number:
PCT/CN2018/114966
Publication Date:
May 14, 2020
Filing Date:
November 12, 2018
Export Citation:
Assignee:
UNIV SHENZHEN (CN)
UNIV SICHUAN (CN)
UNIV SICHUAN (CN)
International Classes:
E21B25/00; E21B21/00; E21B25/10
Foreign References:
| CN106932223A | 2017-07-07 | |||
| CN101215959A | 2008-07-09 | |||
| CN107130933A | 2017-09-05 | |||
| CN103775013A | 2014-05-07 | |||
| US20150255179A1 | 2015-09-10 |
Attorney, Agent or Firm:
GAOYUNG INTELLECTUAL PROPERTY AGENCY (GENERAL PARTNERSHIP) (CN)
Download PDF:
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