定向井抽油杆柱纵横扭耦合振动仿真研究  

Simulation study of sucker rod string on longitudinal,transverse and torsional coupling vibration in directional wells

作　　者：王宏博 孙秀荣 李凤鑫 李伟成[3] 辛顺 王长亮 李东芳[1] WANG Hong-bo;SUN Xiu-rong;LI Feng-xin;LI Wei-cheng;XIN Shun;WANG Chang-liang;LI Dong-fang(Offshore Oil Engineering Co.,Ltd.,Tianjin 300451,China;Hebei University of Environmental Engineering,Qinhuangdao 066102,China;School of Mechanical Engineering,Yanshan University,Qinhuangdao 066004,China)

机构地区：[1]海洋石油工程股份有限公司,天津300451 [2]河北环境工程学院,河北秦皇岛066102 [3]燕山大学机械工程学院,河北秦皇岛066004

出　　处：《振动工程学报》2024年第11期1936-1949,共14页Journal of Vibration Engineering

基　　金：国家自然科学基金青年基金资助项目(52304049);河北省自然科学基金青年基金资助项目(E2021203095);国家高端外国专家引进计划项目(G2022003010L);河北省高等学校科学技术研究项目(ZC2023164);河北环境工程学院科技支撑项目(2020ZRZD01);河北省引进留学人员资助项目(C20220336);燕山大学基础创新科研培育项目(青年)(2021LGQN009)。

摘　　要：抽油杆柱是由接箍与抽油杆通过螺纹连接组成的细长杆柱。对抽油杆柱动力学行为的研究是预防抽油杆柱失效破坏,降低油井运行成本的基础。针对抽油杆柱的纵横扭耦合振动,提出杆管摩擦力产生的绕轴扭矩是扭转振动的激励这一观点。考虑摩擦力对杆柱纵横扭耦合振动的影响,建立了具有初弯曲的定向井抽油杆柱在顶端位移激励、底端载荷激励、弯曲井眼轨道激励与油管约束条件下的纵横扭耦合振动仿真模型。采用四阶龙格-库塔法实现了对仿真模型的求解和对杆柱动力学行为的仿真模拟。仿真结果表明:杆柱的纵横扭耦合振动对杆柱纵向、横向振动仿真结果均有影响,相对来说对纵向振动的影响并不明显;油井造斜段的杆管接触力大,杆柱受压段的杆管碰撞严重,因此油井的造斜段与杆柱的受压段为杆管偏磨的危险点;正常预紧情况下,杆柱的扭转振动不足以导致抽油杆柱脱扣,但当接箍螺纹预紧力降至杆柱的最大扭矩以下后,扭转振动即可能导致抽油杆柱脱扣。The rod string is a thin rod string composed of a coupling and a rod connected by threads.The research on the dynamic behavior of the sucker rod string is the basis to prevent the failure of the sucker rod string and reduce the operation cost of the oil well.In view of the coupling vibration of rod string,it is proposed that the torsional torque generated by the friction force between the rod and tubing is the excitation of torsional vibration.Considering the influence of friction force on the coupling vibration of rod string,a simulation model of the coupling vibration of rod string in one directional well with initial bending is established under the conditions of displacement excitation at the top,load excitation at the bottom,trajectory excitation at the curved hole and tubing constraint.The four-order Runge-Kutta method is used to solve the simulation model and to simulate the dynamic behavior of the rod string.The simulation results show that:both longitudinal and transverse vibration simulation results are affected by the coupling vibration of the rod string.The effect on longitudinal vibration is not obvious.The contact force between the rod and the tubing in the inclined section of the oil well is high,and the collision in the compressed section of the rod string is serious.Hence,the inclined section of the oil well and the compressed section of the rod string are dangerous points for eccentric wear.Under normal preload conditions,the torsional vibration of the rod string is not sufficient to cause the rod string to trip.However,when the preload force of the coupling drops below the maximum torque of the rod string,torsional vibration may cause the rod string to trip.The research provides a theoretical basis for analyzing the failure mechanism of pumping rods,improving the working life of pumping rods and optimizing the design of pumping rods.

关 键 词：耦合振动 抽油杆柱 定向井 轨道激励 摩擦扭矩 

分 类 号：O327[理学—一般力学与力学基础] TE933.2[理学—力学]