The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 06, 2020
Filed:
Jul. 13, 2018
Shandong University of Science and Technology, Qingdao, CN;
Wei Lu, Qingdao, CN;
Zhen Liu, Qingdao, CN;
Guansheng Qi, Qingdao, CN;
Jinliang Li, Qingdao, CN;
Dongling Sun, Qingdao, CN;
Weimin Cheng, Qingdao, CN;
Dong Wang, Qingdao, CN;
Chuanrui Qin, Qingdao, CN;
SHANDONG UNIVERSITY OF SCIENCE AND TECHNOLOGY, Qingdao, CN;
Abstract
A dynamically self-balancing pressurized borehole sealing apparatus and method thereof for coal seam gas pressure measurement having a pressure measuring tube arranged in a borehole with one end of the pressure measuring tube provided with a pressure measuring unit. The pressure measuring tube is wrapped with an expansion airbag and provided with a pressure introducing hole communicating with the expansion airbag. On each side of the expansion airbag, the pressure measuring tube is wrapped with a front borehole inflatable sealing airbag and a rear borehole inflatable sealing airbag respectively. A gel injection chamber is reserved between the front borehole sealing airbag and the rear borehole sealing airbag and between the expansion airbag and an inner side of the borehole. Gas from the pressure measuring tube expands the expansion airbag and squeezes sealing gel in the gel injection chamber into borehole fractures for dynamic pressurized sealing.