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Patent Searching and Data


Title:
RECIPROCATING SAMPLING METHOD AND DEVICE FOR USE IN FIXED-POINT SAMPLING OF GAS CONTENT
Document Type and Number:
WIPO Patent Application WO/2019/140975
Kind Code:
A1
Abstract:
The present invention relates to a reciprocating sampling method and device for use in fixed-point sampling of gas content, wherein the method comprises the following steps: 1) performing sectional drilling, according to a predetermined drilling path, on a hollow drill which has a coal core tube fixed at the front end thereof; 2) when the hollow drill drills to a predetermined depth for sampling, pushing the coal core tube to the front end of the hollow drill for fixation, and when the hollow drill once again drills to a sampling length and a coal sample enters within the coal core tube, inflating an air bag at the front end of the coal core tube and sealing the front end of the coal core tube after the expansion of the air bag; 3) taking out the sealed coal core tube along the inner hole of the hollow drill, and taking out the coal sample from the coal core tube after the air bag is deflated, thus completing fixed-point sampling.

Inventors:
LI HUI (CN)
WEI JIANPING (CN)
CHENG LEI (CN)
Application Number:
PCT/CN2018/112672
Publication Date:
July 25, 2019
Filing Date:
October 30, 2018
Export Citation:
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Assignee:
UNIV HENAN POLYTECHNIC (CN)
International Classes:
G01N1/08; E21B25/10
Foreign References:
CN107991129A2018-05-04
CN105806650A2016-07-27
CN107576773A2018-01-12
JP5920739B12016-05-18
CN201662486U2010-12-01
Attorney, Agent or Firm:
NANJING JINGWEI PATENT & TRADEMARK AGENCY CO., LTD (CN)
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