况雨春,张涛,林伟. 小尺度水平井钻柱动力学实验台架研制及应用[J]. 石油钻探技术,2024,52(0):1-9. DOI: 10.11911/syztjs.2024066
引用本文: 况雨春,张涛,林伟. 小尺度水平井钻柱动力学实验台架研制及应用[J]. 石油钻探技术,2024,52(0):1-9. DOI: 10.11911/syztjs.2024066
KUANG Yuchun, ZHANG Tao, LIN Wei. Fabrication and application of drill string dynamics experiment bench for small scale horizontal well[J]. Petroleum Drilling Techniques, 2024, 52(0):1-9. DOI: 10.11911/syztjs.2024066
Citation: KUANG Yuchun, ZHANG Tao, LIN Wei. Fabrication and application of drill string dynamics experiment bench for small scale horizontal well[J]. Petroleum Drilling Techniques, 2024, 52(0):1-9. DOI: 10.11911/syztjs.2024066

小尺度水平井钻柱动力学实验台架研制及应用

Fabrication and application of drill string dynamics experiment bench for small scale horizontal well

  • 摘要: 在水平井钻井过程中,钻头与管柱的运动规律非常复杂,现场测试研究钻头与钻柱振动的成本高,无法准确对各因素进行解耦,且数据采样率低,不足以对系统进行分析。因此,以物理相似为基础,设计了一套基于微钻头-钻柱-岩石的小尺度水平井钻柱动力学模拟实验台架。在钻柱上设计分段套管,模拟套管对管柱的约束。为更加真实反应钻头与岩石互作用对钻杆及钻头振动的影响,设计微型PDC钻头进行模拟破岩。开展了水平井钻柱室内试验研究,分析了钻柱系统的耦合振动、转速以及钻压对钻柱系统振动的影响规律。结果表明:钻头的轴向振动对钻头的扭转振动有较大的影响,且当钻柱发生扭转振动时,其功率谱密度值明显要高于匀速转动下钻头的功率谱密度;随着转速的增加,钻头和钻柱的横向振动加速度也随之增加,钻头扭转振动在主频上的振动幅值也随之增大;随着钻压的增加,钻头粘滑振动和横向振动加剧,但对轴向振动影响不明显。

     

    Abstract: In the process of horizontal well drilling, the motion law of the bit and the drill string is very complex. The cost of field testing and studying the vibration of drill bit and string is high, which makes it impossible to accurately decouple various factors, and the data sampling rate is low, which is not enough to analyze drill string system. Based on physical similarity, a dynamic simulation test bench for drilling string of small-scale horizontal well is designed, which is based on the interaction of micro bit-drill string-rock. The segmented casing is designed on the drill string to simulate the constraint of casing on the string. In order to more truly reflect the impact of bit rock interaction on drill pipe and bit vibration, a micro PDC bit was designed to simulate rock breaking. Laboratory experiments of drilling string in horizontal Wells were carried out to study the effects of coupling vibration, rotational speed and bit weight on the vibration of drilling string system. The results show that the axial vibration of drill bit has a great influence on the torsional vibration of drill bit, and the power spectral density of drilling string under torsional vibration is obviously higher than that under constant rotation. With the increase of rotational speed, the transverse vibration acceleration of the bit and drill string also increases, and the vibration amplitude of the bit torsional vibration on the main frequency also increases. With the increase of bit weight, stick-slip vibration and lateral vibration of bit are intensified, but the effect on axial vibration is not obvious.

     

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