Title:
PRESSURE-RELIEF ANTI-OUTBURST DRILLING MACHINE
Document Type and Number:
WIPO Patent Application WO/2020/151208
Kind Code:
A1
Abstract:
Provided is a pressure-relief anti-outburst drilling machine, comprising a drill rod (1), a motor (6) driving the drill rod (1) to rotate and a drill bit (7) arranged at the end of the drill rod (1), an air inlet channel (2) and a pressure relief channel (3) are arranged in the drill rod (1), a pressure relief valve (4) is arranged in the pressure relief channel (3), a pressure relief hole (5) matched with the pressure relief valve (4) is provided on the drill rod (1), the pressure relief channel (3) is connected to a gas extraction pipeline through an external exhaust pipeline (8), and a gas flow meter (9) used for monitoring gas flow is arranged on the exhaust pipeline (8).
Inventors:
WANG LEI (CN)
YUAN QIUPENG (CN)
YUAN ANYING (CN)
YUAN QIUPENG (CN)
YUAN ANYING (CN)
Application Number:
PCT/CN2019/096404
Publication Date:
July 30, 2020
Filing Date:
July 17, 2019
Export Citation:
Assignee:
UNIV ANHUI SCI & TECHNOLOGY (CN)
International Classes:
E21B44/02; E21B47/00; E21C35/04; E21F17/00; E21F17/18
Foreign References:
| CN109611072A | 2019-04-12 | |||
| CN109653689A | 2019-04-19 | |||
| CN101446178A | 2009-06-03 | |||
| CN202017459U | 2011-10-26 | |||
| CN105485387A | 2016-04-13 | |||
| CN204782970U | 2015-11-18 | |||
| US4544208A | 1985-10-01 |
Attorney, Agent or Firm:
HEFEI XINGDONG INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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