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Modeling and Analysis of Core Drilling of Marine Gas Hydrate by Seafloor Drill
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Dan WU, Yongping JIN, Deshun LIU, Buyan WAN
Mining and Metallurgical Engineering | 2024, 44(4) : 136 - 143
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Mining and Metallurgical Engineering | 2024, 44(4): 136-143
• MINING •
Modeling and Analysis of Core Drilling of Marine Gas Hydrate by Seafloor Drill
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Dan WU, Yongping JIN, Deshun LIU, Buyan WAN
Affiliations
  • National-Local Joint Engineering Laboratory of Equipment and Safety Technologies for Exploration of Marine Mineral Resources, Hunan University of Science and Technology, Xiangtan 411201, Hunan, China
Published: 2024-08-01 doi: 10.3969/j.issn.0253-6099.2024.04.026
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Aiming at obvious elastic-plastic deformation of diamond drill bits in the process of drilling marine gas hydrate, a modeling approach that is suitable for the core drilling process of drill bits was proposed based on the Hertz theory. Firstly, the rock-breaking mechanism was analyzed for marine gas hydrates from elastic deformation to elasticplastic deformation during the drilling process under sea, and the drilling pressure and cutting force of single diamond particle on the diamond bit during the drilling process were calculated. Secondly, according to the stress condition of a single diamond particle, the theoretical relationships between drilling pressure and torque on the whole bit and other drilling parameters were obtained, and a mechanical model was established for the diamond drilling bit. Finally, a relationship curve between the saturation of marine gas hydrate and the torque and drilling pressure was obtained based on analysis. An at-sea testing by adopting such method has successfully taken some samples of marine gas hydrate, which has verified the feasibility of this method. This research provides a theoretical reference for the design of drill bit parameters and optimization of efficient deep-sea core drilling operation.

seafloor drill  /  Hainiuhao  /  deep-sea drilling  /  diamond drill bit  /  marine gas hydrate  /  core drilling
Dan WU, Yongping JIN, Deshun LIU, Buyan WAN. Modeling and Analysis of Core Drilling of Marine Gas Hydrate by Seafloor Drill[J]. Mining and Metallurgical Engineering, 2024 , 44 (4) : 136 -143 . DOI: 10.3969/j.issn.0253-6099.2024.04.026
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doi: 10.3969/j.issn.0253-6099.2024.04.026
  • Receive Date：2024-02-27
  • Online Date：2026-03-18
  • Published：2024-08-01
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  • Received：2024-02-27
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    National-Local Joint Engineering Laboratory of Equipment and Safety Technologies for Exploration of Marine Mineral Resources, Hunan University of Science and Technology, Xiangtan 411201, Hunan, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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