Application study of rotary-percussive screw drilling tool in hard-rock geothermal drilling

doi:10.12143/j.ztgc.2023.05.021

Home > Archive>Volume 50, Issue 5, 2023 >146-152. DOI:10.12143/j.ztgc.2023.05.021

Application study of rotary-percussive screw drilling tool in hard-rock geothermal drilling
DOI:
                        10.12143/j.ztgc.2023.05.021
                    
CSTR:
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Author:
                        WANG Yongjun1,2WANG Yongjun
The Second Team of Hydrogeology and Engineering Geology, Shandong Provincial Bureau of Geology & Mineral Resources (Shandong Provincial Lubei Geo-engineering Exploration Institute), Dezhou Shandong 253072, China;Shandong Engineering Technology Research Center for Geothermal Clean Energy Exploration and Reinjection,Dezhou Shandong 253072, China
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LIU Gang1,2LIU Gang
The Second Team of Hydrogeology and Engineering Geology, Shandong Provincial Bureau of Geology & Mineral Resources (Shandong Provincial Lubei Geo-engineering Exploration Institute), Dezhou Shandong 253072, China;Shandong Engineering Technology Research Center for Geothermal Clean Energy Exploration and Reinjection,Dezhou Shandong 253072, China
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TONG Zheng1,2TONG Zheng
The Second Team of Hydrogeology and Engineering Geology, Shandong Provincial Bureau of Geology & Mineral Resources (Shandong Provincial Lubei Geo-engineering Exploration Institute), Dezhou Shandong 253072, China;Shandong Engineering Technology Research Center for Geothermal Clean Energy Exploration and Reinjection,Dezhou Shandong 253072, China
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ZHAO Changliang1,2ZHAO Changliang
The Second Team of Hydrogeology and Engineering Geology, Shandong Provincial Bureau of Geology & Mineral Resources (Shandong Provincial Lubei Geo-engineering Exploration Institute), Dezhou Shandong 253072, China;Shandong Engineering Technology Research Center for Geothermal Clean Energy Exploration and Reinjection,Dezhou Shandong 253072, China
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ZHENG Yuxuan1,2ZHENG Yuxuan
The Second Team of Hydrogeology and Engineering Geology, Shandong Provincial Bureau of Geology & Mineral Resources (Shandong Provincial Lubei Geo-engineering Exploration Institute), Dezhou Shandong 253072, China;Shandong Engineering Technology Research Center for Geothermal Clean Energy Exploration and Reinjection,Dezhou Shandong 253072, China
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FENG Shoutao1,2FENG Shoutao
The Second Team of Hydrogeology and Engineering Geology, Shandong Provincial Bureau of Geology & Mineral Resources (Shandong Provincial Lubei Geo-engineering Exploration Institute), Dezhou Shandong 253072, China;Shandong Engineering Technology Research Center for Geothermal Clean Energy Exploration and Reinjection,Dezhou Shandong 253072, China
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Affiliation:1.The Second Team of Hydrogeology and Engineering Geology, Shandong Provincial Bureau of Geology & Mineral Resources (Shandong Provincial Lubei Geo-engineering Exploration Institute), Dezhou Shandong 253072, China;2.Shandong Engineering Technology Research Center for Geothermal Clean Energy Exploration and Reinjection,Dezhou Shandong 253072, China
Clc Number:P634.4;TE921
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Abstract:

In view of the problem of low mechanical drilling speed in the hard rock such as granite and gneiss in the geothermal drilling at present， a mechanical rotary-percussive screw drilling tool is introduced and tested in granite formation of JHR-1 well and gneiss formation of HG-1 well. Compared with the ordinary screw drilling tool， the mechanical drilling speed of the rotary-percussive screw drilling tool increases respectively by 10%， 8.4% and 7.6% in ?215.9 mm well section of JHR-1， ?215.9 mm and ?311.2mm well section of HG-1， and no other side effects exist during the drilling process. The test proves that the mechanical drilling speed can be effectively improved by the use of rotary-percussive screw drilling tool， which provides a foundation for the application and popularization of the rotary-percussive screw drilling tool in the drilling of hard rock such as granite and gneiss.

Key words:rotary-percussive screw drilling tool;impact broken rock;hard rock formation;mechanical drilling speed;geothermal drilling

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History

Received:April 23,2023
Revised:June 07,2023
Adopted:June 12,2023
Online: November 02,2023
Published: September 10,2023

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