Development of a pressure coring system for the investigation of deep underground exploration

Da Guo; Ling Chen; Zhongya Zhou; Dingming Wang; Yiwei Zhang; Xun Yang; Xin Fang; Xiaojun Wang; Heping Lu; Lin Dai; Heping Xie

International Journal of Mining Science and Technology (Nov 2023)

Development of a pressure coring system for the investigation of deep underground exploration

Da Guo,
Ling Chen,
Zhongya Zhou,
Dingming Wang,
Yiwei Zhang,
Xun Yang,
Xin Fang,
Xiaojun Wang,
Heping Lu,
Lin Dai,
Heping Xie

Affiliations

Da Guo: State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering, Sichuan University, Chengdu 610065, China; School of Mechanical Engineering, Sichuan University, Chengdu 610065, China; Guangdong Provincial Key Laboratory of Deep Earth Sciences and Geothermal Energy Exploitation and Utilization, Institute of Deep Earth Sciences and Green Energy, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China
Ling Chen: State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering, Sichuan University, Chengdu 610065, China; School of Mechanical Engineering, Sichuan University, Chengdu 610065, China; Corresponding author.
Zhongya Zhou: Petroleum Engineering Technology Research Institute of Sinopec Jianghan Oilfield Company, Wuhan 430035, China
Dingming Wang: State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering, Sichuan University, Chengdu 610065, China; Guangdong Provincial Key Laboratory of Deep Earth Sciences and Geothermal Energy Exploitation and Utilization, Institute of Deep Earth Sciences and Green Energy, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China
Yiwei Zhang: State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering, Sichuan University, Chengdu 610065, China; Guangdong Provincial Key Laboratory of Deep Earth Sciences and Geothermal Energy Exploitation and Utilization, Institute of Deep Earth Sciences and Green Energy, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China
Xun Yang: State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering, Sichuan University, Chengdu 610065, China; School of Mechanical Engineering, Sichuan University, Chengdu 610065, China; Guangdong Provincial Key Laboratory of Deep Earth Sciences and Geothermal Energy Exploitation and Utilization, Institute of Deep Earth Sciences and Green Energy, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China
Xin Fang: State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering, Sichuan University, Chengdu 610065, China; Guangdong Provincial Key Laboratory of Deep Earth Sciences and Geothermal Energy Exploitation and Utilization, Institute of Deep Earth Sciences and Green Energy, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China
Xiaojun Wang: Petroleum Engineering Technology Research Institute of Sinopec Jianghan Oilfield Company, Wuhan 430035, China
Heping Lu: Petroleum Engineering Technology Research Institute of Sinopec Jianghan Oilfield Company, Wuhan 430035, China
Lin Dai: Petroleum Engineering Technology Research Institute of Sinopec Jianghan Oilfield Company, Wuhan 430035, China
Heping Xie: State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering, Sichuan University, Chengdu 610065, China; Guangdong Provincial Key Laboratory of Deep Earth Sciences and Geothermal Energy Exploitation and Utilization, Institute of Deep Earth Sciences and Green Energy, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China

Journal volume & issue: Vol. 33, no. 11
pp. 1351 – 1364

Abstract

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To provide a more accurate evaluation of the scale of deep underground resources, a new pressure coring system was carefully developed and its strength and safety of the engineering were verified by theoretical analyses and numerical simulation. The designed pressure coring system can obtain cores with length of 3 m and diameter of 50 mm at 70 MPa. The results of the ball-drop operation experiment demonstrate that differential motion assembly can effectively cut a safety pin by applying a tensile force of 4852 N, and it can lift the core tube through the center pole to complete a series of mechanical actions to seal the pressure. Additionally, by maintaining pressures at 70 MPa for 30 min, the pressure sealing capacity of the system was proven. Furthermore, a core sample with a diameter of 50 mm was obtained through a core drilling experiment and the coring performance of the pressure coring system was verified. This study can not only enrich the existing onshore coring technology but also provide a theoretical guide and design criteria for the development of similar pressure coring systems to meet the demand for deeper underground exploration.

Published in International Journal of Mining Science and Technology

ISSN: 2095-2686 (Print); 2589-062X (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/international-journal-of-mining-science-and-technology

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