小口径深孔钻探管柱扭转振动特性分析
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作者单位:

1.长江岩土工程有限公司,湖北 武汉 430010;2.中国地质大学(武汉),湖北 武汉 430074

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P634

基金项目:

长江设计集团有限公司自主创新项目“多功能定向勘察钻机研发和孔底动力取芯技术研究”(编号:CX2020Z27)


Torsional vibration characteristics analysis of pipe string in small diameter deep hole
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1.Changjiang Geotechnical Engineering Corporation, Wuhan Hubei 430010, China;2.China University of Geosciences, Wuhan Hubei 430074, China

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    摘要:

    在小口径深孔取心钻探领域中,除了传统的提钻取心方法外,绳索取心工艺、螺杆马达孔底动力工具等钻进方法也被广泛地应用,不同的钻具组合与钻杆柱一起组成了长细比很大的柔性杆件,在钻进过程中产生复杂的振动,极大地影响了钻探工程的安全性。目前,以钻井工程为代表的管柱振动理论已经发展出了很多成熟的分析方法,但是针对小口径深孔钻探的垂直孔身结构、金刚石钻头磨削岩层、特别是选择不同钻具组合和钻进方法时,相关的管柱扭转振动特性研究依然不足。有限元分析方法适用于求解边界条件复杂的问题,用于钻探管柱的振动特性分析有很好的效果。基于ANSYS软件,选取适用于小口径深孔钻探的多种典型钻具组合,建立相应的有限元分析模型,求解孔深、钻压等因素与管柱扭转振动特性之间的关系,并给出了不同孔深条件下可能引起管柱共振的临界转速求解方法。该研究可在钻具组合选择、转速选择和管柱安全性评价等方面为小口径深孔取心钻探工程提供一定参考。

    Abstract:

    In the field of small diameter deep hole coring drilling, in addition to the traditional lifting and coring methods, drilling methods such as wireline coring technology and screw motor bottom hole power tools are also widely used. Different bottom hole assembly (BHA) and drill strings together form flexible rods with a large slenderness ratio, which generate complex vibrations during the drilling process, profoundly affecting the safety of drilling engineering. At present, many mature analysis methods have been developed for the theory of pipe string vibration represented by drilling engineering, but research on the torsional vibration characteristics of pipe strings is still insufficient for the vertical hole structure of small diameter deep hole drilling, diamond bit grinding of rock layers, and especially when selecting different BHA and drilling methods. The finite element analysis method is suitable for solving problems with complex boundary conditions, and has good results in analyzing the vibration characteristics of drilling strings. Based on ANSYS software, a variety of typical BHA suitable for small diameter deep hole drilling are selected, and corresponding finite element analysis models are established to solve the relationship between factors such as hole depth, weight on bit, and the torsional vibration characteristics of the pipe string. A solution method for the critical rotational speed that may cause the joint vibration of the pipe string under different hole depths is given. This study can provide some reference for small diameter deep hole coring drilling engineering in terms of BHA selection, rotational speed selection, and string safety evaluation.

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胡坤生,肖冬顺,周治刚,等.小口径深孔钻探管柱扭转振动特性分析[J].钻探工程,2023,50(3):30-36.
HU Kunsheng, XIAO Dongshun, ZHOU Zhigang, et al. Torsional vibration characteristics analysis of pipe string in small diameter deep hole[J]. Drilling Engineering, 2023,50(3):30-36.

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历史
  • 收稿日期:2022-11-21
  • 最后修改日期:2023-03-20
  • 录用日期:2023-03-23
  • 在线发布日期: 2023-06-01
  • 出版日期: 2023-05-10
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