Application of sidetracking to obstacle bypassing in hot dry rock Well HDR-1

TAN Xianfeng; ZHANG Qiang; ZHAO Changliang; ZHAN Qishuai and LI Shenghai; ${author.authorNameEn}

doi:10.12143/j.ztgc.2023.03.011

2023 Vol. 50, No. 3

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Article navigation > DRILLING ENGINEERING > 2023 > 50(3): 83-91

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TAN Xianfeng, ZHANG Qiang, ZHAO Changliang, ZHAN Qishuai and LI Shenghai, . 2023. Application of sidetracking to obstacle bypassing in hot dry rock Well HDR-1. DRILLING ENGINEERING, 50(3): 83-91. doi: 10.12143/j.ztgc.2023.03.011

Citation:

TAN Xianfeng, ZHANG Qiang, ZHAO Changliang, ZHAN Qishuai and LI Shenghai, . 2023. Application of sidetracking to obstacle bypassing in hot dry rock Well HDR-1. DRILLING ENGINEERING, 50(3): 83-91. doi: 10.12143/j.ztgc.2023.03.011

Application of sidetracking to obstacle bypassing in hot dry rock Well HDR-1

1. Shandong Provincial Lunan Geology and Exploration Institute （Shandong Provincial Bureau of Geology &;Mineral Resources No.2 Geological Brigade）, Jining Shandong 272100, China;
2. Shandong Geothermal Clean Energy Exploration and Development Engineering Research Center,Jining Shandong 272100, China;
3.The Second Institute of Hydrogeology and Engineering Geology, Shandong Provincial Bureau of Geology &;Mineral Resources (Lubei Geo‑engineering Exploration Institute),Dezhou Shandong 253072, China

More Information

Corresponding author: ZHANG Qiang, 1327107863@qq.com

Received Date: 07 July 2022

Revised Date: 25 October 2022

Abstract

Abstract

A sticking incident happened in HDR-1 well at a depth of 3000m in hot dry rock. After various treatments， over 100m long “lost fish” still remained downhole. With the casing-milling method to continue to deal with the fish， it may lead to great difficulty， high risk and long period. After trade-offs of various methods， it is decided to adopt the method of sidetracking to bypass the incident section. Through the comparison of three plans of sidetracking with the deflector inside casing， sidetracking from the open hole cement plug and sidetracking with the open hole deflector， sidetracking from the open hole cement plug was finally adopted. The successful application of sidetracking around the barrier is the first time in hot dry rock drilling in China， which has overcome the technical difficulties of large depth， large diameter，high temperature and high hardness， and applied advanced technology， such as measurement while drilling， complex power drilling technology， high temperature resistant mud， providing new technical support for hot dry rock scientific drilling and deep geothermal resource exploration in China.
- hot dry rock drilling well /
- sidetracking around the obstacle /
- high temperature hard rock /
- PDM drill tool

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References

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