摘要
为了研究共振冲击钻井系统的动力学特性,综合考虑钻柱的轴向动-静载复合冲击以及轴向冲击-周向扭转耦合运动,分别建立基于定切深方法和状态依赖时滞方法的钻进系统动力学模型。通过杜哈梅积分、四阶龙格-库塔方法对动力学模型求解,分析轴向简谐动载的频率和幅值对共振钻井系统动力学特性的影响;最后,基于数值求解结果和箱线图方法,对比分析两种钻进系统动力学模型特性差异。结果表明:在给定的初始条件下,当简谐动载频率从25 Hz提高到100 Hz时,钻进系统轴向方向的跳钻现象和扭转方向的黏滑效应明显减弱;当简谐动载幅值从30 kN提高到60 kN时,钻进系统轴向方向钻头跳钻现象频发,扭转方向黏滑效应加剧;在相同初始条件和简谐动载激励下,两种模型得到的动力学特性响应曲线无论是形状还是频率均存在差异,采用状态依赖时滞模型计算得到的数据点更加集中,更接近实际钻井工况;高频低幅的简谐动载能改善共振冲击钻井系统动力学特性,从而提高钻进效率。
In order to study the dynamics of resonance impact drilling,two dynamic models of the drilling system were proposed based on the constant depth-of-cut method and the state-dependent time delay method,respectively,considering the load of axial dynamic-static composite impact and axial-torsional coupled motion of the drill string.The Duhamel integral and a fourth-order Runge-Kutta method were used to solve the dynamic models,and the influences of frequency and amplitude of harmonic dynamic load on the dynamic characteristics of the resonance drilling system were analyzed.The dynamic characteristics of the two models were compared and discussed based on the numerical solution results and box-plots.The results indicate that,when the frequency of the harmonic dynamic load increases from 25 Hz to 100 Hz,the drilling bit bouncing phenomenon in the axial direction and the stick-slip effect in the torsional direction can be obviously weakened under the given initial conditions,and when the amplitude of the harmonic dynamic load increases from 30 kN to 60 kN,the both phenomena can be further exacerbated.Besides,under the same initial and harmonic dynamic load conditions,the dynamic characteristic response curves obtained by the two models are different both in the shape and response frequency,and the data points calculated by the state-dependent time delay model are closer to the actual drilling condition.It is concluded that high-frequency and low-amplitude harmonic dynamic loads can improve the dynamic characteristics of the resonance impact drilling system,thereby improving the drilling efficiency.
作者
李思琪
陈卓
李杉
李玮
郭金玉
刘德伟
LI Siqi;CHEN Zhuo;LI Shan;LI Wei;GUO Jinyu;LIU Dewei(Institute of Petroleum Engineering,Northeast Petroleum University,Daqing 163318,China;National Engineering Research Center of Oil&Gas Drilling and Completion Technology,Beijing 100000,China;Directional Well Technical Service Branch,CNPC Bohai Drilling Engineering Company Limited,Tianjin 300280,China;The Second Drilling Company of Daqing Oilfield,PetroChina,Daqing 163413,China)
出处
《中国石油大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2024年第1期124-132,共9页
Journal of China University of Petroleum(Edition of Natural Science)
基金
黑龙江省博士后特别资助项目(LBH-TZ2101)
黑龙江省普通本科高等学校青年创新人才培养计划(UNPYSCT-2020151)
中央支持地方高校改革发展(优秀青年人才项目)
黑龙江省留学回国人员择优资助项目(启动类)。
关键词
共振冲击钻井系统
动力学特性
定切深
状态依赖时滞
箱线图
resonance impact drilling system
dynamic characteristics
constant depth-of-cut
state-dependent time delay
box-plot
