Application of PDM drilling technology in Well-GR1 drilling in hot dry rock

doi:10.12143/j.ztgc.2021.02.007

Home > Archive>Volume 48, Issue 2, 2021 >49-53. DOI:10.12143/j.ztgc.2021.02.007

Application of PDM drilling technology in Well-GR1 drilling in hot dry rock
DOI:
                        10.12143/j.ztgc.2021.02.007
                    
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Author:
                        TAN Xianfeng1,2TAN Xianfeng
Shandong Lunan Geological Engineering Survey Institute (The Second Geological Brigade of Shandong;Geological Survey Bureau), Jining Shandong 272100, China;China University of Geosciences, Wuhan Hubei 430074, China
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WANG Jingguang1WANG Jingguang
Shandong Lunan Geological Engineering Survey Institute (The Second Geological Brigade of Shandong;Geological Survey Bureau), Jining Shandong 272100, China
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GUO Xinqiang1GUO Xinqiang
Shandong Lunan Geological Engineering Survey Institute (The Second Geological Brigade of Shandong;Geological Survey Bureau), Jining Shandong 272100, China
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DUAN Longchen2DUAN Longchen
China University of Geosciences, Wuhan Hubei 430074, China
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Affiliation:1.Shandong Lunan Geological Engineering Survey Institute (The Second Geological Brigade of Shandong;Geological Survey Bureau), Jining Shandong 272100, China;2.China University of Geosciences, Wuhan Hubei 430074, China
Clc Number:P634;TE242
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Abstract:

This paper introduces the application of composite drilling technology of rotary （top drive） drilling and PDM drilling in hot dry rock Well-GR1 in Gonghe Basin， Qinghai so as to improve hot dry rock drilling efficiency and reduce downhole incidents. According to the working characteristics of the PDM drill under high downhole temperature， optimization was conducted of the high temperature resistance rubber， as well as the clearance between the stator and rotor of the PDM drill. It was tested for drilling of the high temperature hot dry rock well （hole depth of 3705m， hole bottom temperature 236℃） for the first time and was successful. It can provide experience for hot dry rock drilling and deep geothermal resource exploration.

Key words:hot dry rock;PDM drill;Well-GR1;Gonghe Basin

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Received:March 23,2020
Revised:October 13,2020
Adopted:October 14,2020
Online: March 10,2021
Published: February 10,2021

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