Design and Experimental Study of Core Bit for Hard Rock Drilling in Deep-Sea
The hard rock stratum will seriously affect the efficiency of deep-sea drilling and greatly increase the cost of drilling operations due to its complexity. In ocean drilling operations, the design of the bit is critical. Therefore, the core bit should be able to drill in a variety of formations, esp...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-02-01
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| Series: | Journal of Marine Science and Engineering |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2077-1312/11/2/306 |
| _version_ | 1797620092895232000 |
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| author | Xingchen Li Liang Xiong Wenwei Xie Ke Gao Yutao Shao Yunlong Chen Yanjiang Yu Beibei Kou Qiuping Lu Jing Zeng Haoyu Yu |
| author_facet | Xingchen Li Liang Xiong Wenwei Xie Ke Gao Yutao Shao Yunlong Chen Yanjiang Yu Beibei Kou Qiuping Lu Jing Zeng Haoyu Yu |
| author_sort | Xingchen Li |
| collection | DOAJ |
| description | The hard rock stratum will seriously affect the efficiency of deep-sea drilling and greatly increase the cost of drilling operations due to its complexity. In ocean drilling operations, the design of the bit is critical. Therefore, the core bit should be able to drill in a variety of formations, especially in hard rock stratum, with the function of reducing the need to change the bit due to formation changes and improving the drilling efficiency. In this paper, three different core bits were designed according to the hard rock stratum of the seabed: the roller bit, diamond bit and bionic bit. According to the test results, it was observed that: (1) It is fully proven that the roller core bit has the characteristics of stable drilling in hard strata, small torque and high drilling efficiency. The same method can realize the core in shallow soft strata through the setting of drilling parameters. (2) For the diamond bit, the field test data show that the new formula diamond bit has a good adaptability to the changing hard rock strata in this area, with an average rate of penetration (ROP) of 4.4 m/h and a bit life of 137.75 m. (3) For the bionic bit, field experiment data showed that drilling in the formation lithology was gray green tuff, which had a core recovery up to 100%. The average ROP was 1.35 m/h, and the highest ROP was 1.88 m/h. The design and experiment of three kinds of drill bits have effectively solved the technical problem of efficient drilling in deep-sea hard-rock stratum. |
| first_indexed | 2024-03-11T08:36:51Z |
| format | Article |
| id | doaj.art-d59ab65b43074ec481245890888071dc |
| institution | Directory Open Access Journal |
| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-03-11T08:36:51Z |
| publishDate | 2023-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-d59ab65b43074ec481245890888071dc2023-11-16T21:27:20ZengMDPI AGJournal of Marine Science and Engineering2077-13122023-02-0111230610.3390/jmse11020306Design and Experimental Study of Core Bit for Hard Rock Drilling in Deep-SeaXingchen Li0Liang Xiong1Wenwei Xie2Ke Gao3Yutao Shao4Yunlong Chen5Yanjiang Yu6Beibei Kou7Qiuping Lu8Jing Zeng9Haoyu Yu10Guangzhou Marine Geological Survey, China Geological Survey, Guangzhou 510075, ChinaGuangzhou Marine Geological Survey, China Geological Survey, Guangzhou 510075, ChinaGuangzhou Marine Geological Survey, China Geological Survey, Guangzhou 510075, ChinaColledge of Construction Engineering, Jilin University, Changchun 130026, ChinaThe Institute of Exploration Techniques, Chinese Academy of Geological Sciences, Langfang 065000, ChinaBeijing Institute of Exploration Engineering, Beijing 100083, ChinaGuangzhou Marine Geological Survey, China Geological Survey, Guangzhou 510075, ChinaGuangzhou Marine Geological Survey, China Geological Survey, Guangzhou 510075, ChinaGuangzhou Marine Geological Survey, China Geological Survey, Guangzhou 510075, ChinaGuangzhou Marine Geological Survey, China Geological Survey, Guangzhou 510075, ChinaGuangzhou Marine Geological Survey, China Geological Survey, Guangzhou 510075, ChinaThe hard rock stratum will seriously affect the efficiency of deep-sea drilling and greatly increase the cost of drilling operations due to its complexity. In ocean drilling operations, the design of the bit is critical. Therefore, the core bit should be able to drill in a variety of formations, especially in hard rock stratum, with the function of reducing the need to change the bit due to formation changes and improving the drilling efficiency. In this paper, three different core bits were designed according to the hard rock stratum of the seabed: the roller bit, diamond bit and bionic bit. According to the test results, it was observed that: (1) It is fully proven that the roller core bit has the characteristics of stable drilling in hard strata, small torque and high drilling efficiency. The same method can realize the core in shallow soft strata through the setting of drilling parameters. (2) For the diamond bit, the field test data show that the new formula diamond bit has a good adaptability to the changing hard rock strata in this area, with an average rate of penetration (ROP) of 4.4 m/h and a bit life of 137.75 m. (3) For the bionic bit, field experiment data showed that drilling in the formation lithology was gray green tuff, which had a core recovery up to 100%. The average ROP was 1.35 m/h, and the highest ROP was 1.88 m/h. The design and experiment of three kinds of drill bits have effectively solved the technical problem of efficient drilling in deep-sea hard-rock stratum.https://www.mdpi.com/2077-1312/11/2/306ocean drillinghard rock stratumservice life of bitefficiencyROPWOB |
| spellingShingle | Xingchen Li Liang Xiong Wenwei Xie Ke Gao Yutao Shao Yunlong Chen Yanjiang Yu Beibei Kou Qiuping Lu Jing Zeng Haoyu Yu Design and Experimental Study of Core Bit for Hard Rock Drilling in Deep-Sea Journal of Marine Science and Engineering ocean drilling hard rock stratum service life of bit efficiency ROP WOB |
| title | Design and Experimental Study of Core Bit for Hard Rock Drilling in Deep-Sea |
| title_full | Design and Experimental Study of Core Bit for Hard Rock Drilling in Deep-Sea |
| title_fullStr | Design and Experimental Study of Core Bit for Hard Rock Drilling in Deep-Sea |
| title_full_unstemmed | Design and Experimental Study of Core Bit for Hard Rock Drilling in Deep-Sea |
| title_short | Design and Experimental Study of Core Bit for Hard Rock Drilling in Deep-Sea |
| title_sort | design and experimental study of core bit for hard rock drilling in deep sea |
| topic | ocean drilling hard rock stratum service life of bit efficiency ROP WOB |
| url | https://www.mdpi.com/2077-1312/11/2/306 |
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