Title:
DEVICE AND METHOD FOR COAL SEAM GAS PRESSURE MEASUREMENT AND DYNAMIC SELF-BALANCING PRESSURIZED HOLE SEALING
Document Type and Number:
WIPO Patent Application WO/2019/100732
Kind Code:
A1
Abstract:
Provided are a device and method for coal seam gas pressure measurement and dynamic self-balancing pressurized hole sealing. The device for coal seam gas pressure measurement and dynamic self-balancing pressurized hole sealing comprises a pressure measuring tube (10) arranged in a drill hole (12). One end of the pressure measuring tube (10) is provided with a pressure measuring unit for gas pressure measurement. An inflatable air bag (9) is wrapped around the pressure measuring tube (10). A pressure introduction hole (11) is provided on the pressure measuring tube (10). The pressure introduction hole (11) communicates with the inflatable air bag (9). A front hole-sealing air bag (2) and a rear hole-sealing air bag (4), respectively wrapped around two sides of the inflatable air bag (9), are provided on the pressure measuring tube (10). A sealant injection cavity is provided between the front hole-sealing air bag (2), the rear-hole sealing air bag (4), the inflatable air bag (9), and an inner wall of the drill hole (12). The front hole-sealing air bag (2) and the rear hole-sealing air bag (4) are each connected to an inflation unit located outside the drill hole (12) by means of an inflation pipe (7). The sealant injection cavity is connected to a sealant injection unit located outside the drill hole (12) by means of a sealant injection line (6). The device and the method for coal seam gas pressure measurement and dynamic self-balancing pressurized hole sealing effectively improve the sealing effects of the coal seam drill hole used for coal seam gas pressure measurement, achieve a dynamic self-balancing hole sealing effect, and improve the accuracy of coal seam gas pressure measurement.
Inventors:
LU WEI (CN)
LIU ZHEN (CN)
QI GUANSHENG (CN)
LI JINLIANG (CN)
SUN DONGLING (CN)
CHENG WEIMIN (CN)
WANG DONG (CN)
QIN CHUANRUI (CN)
LIU ZHEN (CN)
QI GUANSHENG (CN)
LI JINLIANG (CN)
SUN DONGLING (CN)
CHENG WEIMIN (CN)
WANG DONG (CN)
QIN CHUANRUI (CN)
Application Number:
PCT/CN2018/095701
Publication Date:
May 31, 2019
Filing Date:
July 13, 2018
Export Citation:
Assignee:
UNIV SHANDONG SCIENCE & TECH (CN)
International Classes:
E21B33/12; E21B33/13; E21B47/06
Foreign References:
| CN108060903A | 2018-05-22 | |||
| CN204729086U | 2015-10-28 | |||
| CN204186376U | 2015-03-04 | |||
| CN204899914U | 2015-12-23 | |||
| CN104533336A | 2015-04-22 | |||
| CN105756599A | 2016-07-13 | |||
| CN205876263U | 2017-01-11 | |||
| US4474409A | 1984-10-02 |
Attorney, Agent or Firm:
QINGDAO ZHIDILINGCHUANG PATENT AGENCY CO., LTD (CN)
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