轴向振动辅助套管回收的参数优化
|
摘要
为了研究套管打捞系统和轴向激振器参数对套管振动响应的影响规律,为振动系统参数优化提供依据,建立了套管回收系统的等效弹簧-质量模型,并推导了简化模型的解析解,研究了系统参数对套管振幅的影响以及卡点和摩擦力导致的不确定性。研究结果表明:可以通过调整系统的刚度分布实现共振,三阶主振型有更大的轴向振幅,在该振型下共振更有利于套管回收;卡点的存在大幅度地提高了系统的固有频率,摩擦力几乎不改变共振频率,但会大大降低共振响应;实现系统共振比将套管作为一个动态吸振器更有利于减阻;地面检测到的幅频曲线可以用来诊断井下是否存在卡点等问题。
The study on the influences of the parameters of casing salvage system and axial exciter on vibration response of casing can provide basis for optimization of parameters of vibration system.For this reason,the equivalent spring-mass model of casing recovery system is established,and the analytical solution of the simplified model is deduced.The influence of system parameters on casing amplitude and the uncertainty caused by sticking point and friction force are studied.The results show that resonance can be achieved by adjusting the stiffness distribution of the system,the third-order main mode has larger axial amplitude,and the resonance under the mode is more conducive to casing recovery.The existence of sticking points greatly increases the natural frequency of the system,and the friction force hardly changes the resonance frequency,but greatly reduces the resonance response.It is more beneficial to reduce drag to realize system resonance than to use casing as a dynamic vibration absorber.The amplitude-frequency curve detected on the ground can be used to diagnose whether there are sticking points in the well.
The study on the influences of the parameters of casing salvage system and axial exciter on vibration response of casing can provide basis for optimization of parameters of vibration system.For this reason,the equivalent spring-mass model of casing recovery system is established,and the analytical solution of the simplified model is deduced.The influence of system parameters on casing amplitude and the uncertainty caused by sticking point and friction force are studied.The results show that resonance can be achieved by adjusting the stiffness distribution of the system,the third-order main mode has larger axial amplitude,and the resonance under the mode is more conducive to casing recovery.The existence of sticking points greatly increases the natural frequency of the system,and the friction force hardly changes the resonance frequency,but greatly reduces the resonance response.It is more beneficial to reduce drag to realize system resonance than to use casing as a dynamic vibration absorber.The amplitude-frequency curve detected on the ground can be used to diagnose whether there are sticking points in the well.
引文
[1] FORSTER I,GRANT R.Axial excitation and drill string resonance as a means of aiding tubular retrieval-small scale rig testing and full scale field testing[C].IADC/SPE Drilling Conference and Exhibition,6-8 March,2012,San Diego,California,USA.
[2] FINNIE I,BAILEY J J.An experimental study of drill-string vibration[J].ASME J Eng Ind,1960,82(2):129-135.
[3] 高岩.三牙轮钻头钻进时钻柱轴向振动的特征[J].石油学报,2000,21(6):93-96,132.GAO Yan.Axial vibration performance of drill string when drilling with three-cone bit[J].ACTA,2000,21(6):93-96,132.
[4] 高岩,刘志国,郭学增.钻柱轴向振动固有频率的计算和测量[J].西安石油学院学报(自然科学版),2000,15(1):39-43.GAO Yan,LIU Zhiguo,GUO Xuezeng.Calculation and measurement of the natural frequency of axial drilling string vibration[J].Journal of Xi′an Petroleum Institute(Natural Science Edition),2000,15(1):39-43.
[5] 王鹏,倪红坚,王瑞和,等.基于微凸体接触的钻柱纵向振动减摩阻[J].中国石油大学学报(自然科学版),2015,39(1):88-94.WANG Peng,NI Hongjian,WANG Ruihe,et al.Friction reduction research of drill-string longitudinal vibration based on asperity contact[J].Journal of China University of Petroleum(Natural Science Edition),2015,39(1):88-94.
[6] BODINE.Method and Apparatus for Sonically Extracting Oil Well Liners:US,4236580[P].1980-12-02.
[7] HOLEYMAN A E.A method to predict the driveability of vibratory driven piles[C].Fifth International Conference on the Use of Stress Wave Measurements on Piles,1996.
[2] FINNIE I,BAILEY J J.An experimental study of drill-string vibration[J].ASME J Eng Ind,1960,82(2):129-135.
[3] 高岩.三牙轮钻头钻进时钻柱轴向振动的特征[J].石油学报,2000,21(6):93-96,132.GAO Yan.Axial vibration performance of drill string when drilling with three-cone bit[J].ACTA,2000,21(6):93-96,132.
[4] 高岩,刘志国,郭学增.钻柱轴向振动固有频率的计算和测量[J].西安石油学院学报(自然科学版),2000,15(1):39-43.GAO Yan,LIU Zhiguo,GUO Xuezeng.Calculation and measurement of the natural frequency of axial drilling string vibration[J].Journal of Xi′an Petroleum Institute(Natural Science Edition),2000,15(1):39-43.
[5] 王鹏,倪红坚,王瑞和,等.基于微凸体接触的钻柱纵向振动减摩阻[J].中国石油大学学报(自然科学版),2015,39(1):88-94.WANG Peng,NI Hongjian,WANG Ruihe,et al.Friction reduction research of drill-string longitudinal vibration based on asperity contact[J].Journal of China University of Petroleum(Natural Science Edition),2015,39(1):88-94.
[6] BODINE.Method and Apparatus for Sonically Extracting Oil Well Liners:US,4236580[P].1980-12-02.
[7] HOLEYMAN A E.A method to predict the driveability of vibratory driven piles[C].Fifth International Conference on the Use of Stress Wave Measurements on Piles,1996.