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Patent Searching and Data


Title:
INTERNAL BLOWOUT-PREVENTION GAS-RETAINING CONNECTOR FOR MINE
Document Type and Number:
WIPO Patent Application WO/2021/218253
Kind Code:
A1
Abstract:
Disclosed is an internal blowout-prevention gas-retaining connector for mine. The connector comprises a body; the body is mounted at the bottom of a drill pipe (4); the body comprises a valve pipe section (701) and a connecting pipe section (702) arranged from top to bottom; the bottom of the valve pipe section (701) is inserted into the top of the connecting pipe section (702); a blowout-prevention valve seat (706) is provided at a bottom end of the valve pipe section (701), and a blowout-prevention valve bonnet (707) is provided on a bottom surface of the valve pipe section (701); an edge of the blowout-prevention valve bonnet (707) is rotatably connected to a bottom surface edge of the valve pipe section (701); a torsion spring (708) is provided on a bottom surface of the blowout-prevention valve bonnet (707); one end of the torsion spring (708) is connected to the bottom surface of the blowout-prevention valve bonnet (707), and the other end of the torsion spring (708) is connected to the inner wall of the connecting pipe section (702). The connector has an automatic closing function when being used to perform a coring operation a mine coal seam, gas leakage is reduced, and a large-caliber tool is allowed to pass through.

Inventors:
GAO MINGZHONG (CN)
CHEN LING (CN)
LI JIANAN (CN)
LI CONG (CN)
HE ZHIQIANG (CN)
ZHAO YUE (CN)
YANG MINGQING (CN)
WU NIANHAN (CN)
YU BO (CN)
Application Number:
PCT/CN2021/073845
Publication Date:
November 04, 2021
Filing Date:
January 26, 2021
Export Citation:
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Assignee:
UNIV SICHUAN (CN)
International Classes:
E21B34/12; E21B34/06
Foreign References:
CN111021989A2020-04-17
CN111485854A2020-08-04
CN212225173U2020-12-25
CN202596665U2012-12-12
CN110005362A2019-07-12
US20170067315A12017-03-09
US20180163498A12018-06-14
Attorney, Agent or Firm:
GAOYUNG INTELLECTUAL PROPERTY AGENCY (GENERAL PARTNERSHIP) (CN)
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