公开(公告)号：US20220205361A1

公开(公告)日：2022-06-30

申请号：US17596840

申请日：2020-11-09

Applicant: SHANDONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Guanhua NI ,  Kai DONG ,  Weimin CHENG ,  Jingna XIE ,  Gang WANG ,  Yixin LIU ,  Qiming HUANG

IPC: E21F7/00 ,  C04B28/26 ,  C09K3/10 ,  E21B33/13 ,  E21B43/00 ,  E21B43/08 ,  E21B33/12

Abstract: A full-length screen pipe hole protection device and method with pressurized hole packing in a soft coal seam relates to the field of gas drainage technologies. The device includes a grouting system, a drainage system and a hole fixing system. The grouting system injects a pressurized sealing material into a borehole through a pressure pump to increase a sealing effect of the borehole. The drainage system drains gas in the middle of air holes on metal baffle plates and hole fixing screen pipes through a drainage pipe to increase flowability of gas. The hole fixing system is inside the borehole and fixed with the metal baffle plates, and the hole fixing screen pipes are fixedly connected with each other through fitting mouths and fitting buckles. The device is fixedly mounted in the gas drainage borehole. After hole packing, the drainage pipe is connected with a drainage pump to drain gas.