Running-in-hole and fishing technology for the wireline coring tool in ultra-deep horizontal holes with water gushing

SHI Shaoyun; LI Jie; LUO Xianliang; WU Jinsheng; HUANG Xiaolin and TANG Zhijian; ${author.authorNameEn}

doi:10.12143/j.ztgc.2021.11.001

2021 Vol. 48, No. 11

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SHI Shaoyun, LI Jie, LUO Xianliang, WU Jinsheng, HUANG Xiaolin and TANG Zhijian, . 2021. Running-in-hole and fishing technology for the wireline coring tool in ultra-deep horizontal holes with water gushing. DRILLING ENGINEERING, 48(11): 1-7. doi: 10.12143/j.ztgc.2021.11.001

Citation:

SHI Shaoyun, LI Jie, LUO Xianliang, WU Jinsheng, HUANG Xiaolin and TANG Zhijian, . 2021. Running-in-hole and fishing technology for the wireline coring tool in ultra-deep horizontal holes with water gushing. DRILLING ENGINEERING, 48(11): 1-7. doi: 10.12143/j.ztgc.2021.11.001

Running-in-hole and fishing technology for the wireline coring tool in ultra-deep horizontal holes with water gushing

1.Institute of Exploration Technology, CAGS, Chengdu Sichuan 611734, China;
2. Technical Center for Geological Hazard Prevention and Control, CGS, Chengdu Sichuan 611734, China;
3. Sichuan Water Conservancy Planning and Research Institute， Chengdu Sichuan 611731, China

Received Date: 12 March 2021

Revised Date: 21 August 2021

Abstract

Abstract

In order to accurately find out the geological conditions along the tunnel， horizontal wireline core drilling technology is usually used； however， it is difficult to run drilling tools and fishing tools in ultra-deep water gushing horizontal holes in wireline core drilling. Research was carried out to solve the problem from several aspects， including developing special horizontal drilling rig， selecting the high-power mud pump， sealing off and diverting water gushing， designing the wireline feeder for the wireline drilling tool， custom-making special inner-flush horizontal drilling wireline coring drill rods. The influence factors such as mud pump pressure， drill rod inner diameter size， drilling depth， drill rod water-tightness， drilling water gushing volume， water gushing pressure， borehole annulus， on the speed of running the drilling tools and lifting the fishing gear are comprehensively analyzed. With careful organization， a horizontal hole with large gushing water at the 1000m depth level was successfully completed with wireline core drilling， and with high efficiency and low cost. It also accurately identified the engineering geological conditions along the tunnel， achieving satisfactory technical results. It can provide safety guarantee for tunnel design and construction， and also provide valuable experience for drilling horizontal holes with ultra-deep water gushing.
- water gushing horizontal hole /
- wire line core drilling /
- run drilling tools /
- fishing tool /
- wireline feeder

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References

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