New Casing Technology for Large Diameter Through Drilling
A large-diameter, casing technology is applied in the field of new casing-running technology for large-diameter through-hole drilling, which can solve the problem that the casing-running process cannot meet the requirements of rapid casing-running, achieve good filling effect, and prevent casing from running down. , The effect of saving construction time
Active Publication Date: 2022-04-01
HUAINAN MINING IND GRP
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Problems solved by technology
[0003] The technical problem to be solved by the present invention is: the technical problem that the casing running process in the prior art cannot meet the requirements of fast casing running
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[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are part of the present invention Examples, not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0034] like figure 1 As shown, a new casing process for large-diameter through-drilling includes the following steps:
[0035] A. Drilling: Utilize a drilling rig to drill holes and penetrate the roadway, that is, use a Φ196mm guide reaming drill bit. After the reaming is completed, use a chain wrench to disassemble the drill bit; Can.
[0036] In this embodiment, the drilling...
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The invention discloses a novel casing running process for large-diameter through-drilling, comprising the following steps: A. Drilling: penetrating the roadway, unloading the drill bit; B. Running casing: connecting the casing at the tail of the drill rod of the drilling rig, and pulling out the drill , the casing is pulled into the hole with the drill pipe, stop pulling, connect another casing, pull out the drill, the casing is pulled into the hole with the drill pipe, stop pulling, and repeat; C. Fix: the first After a casing is pulled out of the hole, a flange is installed at the end of the bottom casing; D, plugging: to block the gap between the bottom casing and the inner wall of the borehole; E, grouting: to the casing Grouting the gap between the hole and the inner wall of the borehole, after the hole returns to the grout, end the grouting; F, dismantling the drill pipe: after the grout solidifies, remove the drill pipe to complete the single hole sealing work. The invention has the advantages that the tripping out and casing running work are completed synchronously, the safety of the casing running process is improved, the labor intensity of workers is reduced, and the requirements for fast casing running are met.
Description
technical field [0001] The invention relates to the field of gas drainage in coal mines, in particular to a novel casing running process for large-diameter through-drilling holes. Background technique [0002] In the underground production of coal mines, in order to connect two adjacent roadways, it is necessary to construct a part of boreholes to connect the roadways. The through holes are mainly used for cable laying, cement grouting, conveying materials, and gas discharge. Especially for large-diameter through-drilling, when running the casing, due to the heavy weight of the casing, manpower cannot meet the requirements of fast casing running. There is also a mechanical device for running casing in the prior art. As the Chinese invention patent application with publication number CN111364918A discloses a casing casing device, which includes a mounting seat, a guide tube is arranged on one side of the mounting seat, and guide tubes are guided at both ends of the guide tube...
Claims
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IPC IPC(8): E21B7/20E21B33/13
CPCE21B7/20E21B33/13
Inventor 崔海军魏涛景慎怀
Owner HUAINAN MINING IND GRP