Design and Experimental Study of Core Bit for Hard Rock Drilling in Deep-Sea

被引:5
|
作者
Li, Xingchen [1 ,2 ]
Xiong, Liang [1 ,2 ]
Xie, Wenwei [1 ,2 ]
Gao, Ke [3 ]
Shao, Yutao [4 ]
Chen, Yunlong [5 ]
Yu, Yanjiang [1 ,2 ]
Kou, Beibei [1 ,2 ]
Lu, Qiuping [1 ,2 ]
Zeng, Jing [1 ,2 ]
Yu, Haoyu [1 ,2 ]
机构
[1] China Geol Survey, Guangzhou Marine Geol Survey, Guangzhou 510075, Peoples R China
[2] China Geol Survey, Natl Engn Res Ctr Gas Hydrate Explorat & Dev, Guangzhou 510075, Peoples R China
[3] Jilin Univ, Colledge Construct Engn, Changchun 130026, Peoples R China
[4] Chinese Acad Geol Sci, Inst Explorat Tech, Langfang 065000, Peoples R China
[5] Beijing Inst Explorat Engn, Beijing 100083, Peoples R China
关键词
ocean drilling; hard rock stratum; service life of bit; efficiency; ROP; WOB; DIAMOND BIT;
D O I
10.3390/jmse11020306
中图分类号
U6 [水路运输]; P75 [海洋工程];
学科分类号
0814 ; 081505 ; 0824 ; 082401 ;
摘要
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.
引用
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页数:12
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