PDC钻头粘滑振动机理分析  

Stick-Slip Vibration Mechanism Analysis of PDC Bit

作　　者：祝效华[1] 汤历平[1] 孟苹苹[2] 王鹏[1] 王玉[3] 

机构地区：[1]西南石油大学机电工程学院,成都610500 [2]西南石油大学电气信息学院,成都610500 [3]河北省科技工程学校,河北保定071000

出　　处：《石油矿场机械》2012年第4期13-16,共4页Oil Field Equipment

基　　金：国家自然科学基金(50804040);西南石油大学研究生创新基金(GIFSS1104)

摘　　要：建立扭转摆理论分析模型及钻头的运动方程,分析钻头粘滑振动的边界条件,研究钻头的运动形式及粘滑振动机理与影响因素。结果表明:钻头切削岩石时主动扭矩的循环积聚与释放以及钻柱与井壁的摩擦是引起粘滑振动的主要原因;钻头不稳定的受力是造成PDC钻头失效的主要原因。粘滑振动与钻井参数、地层特性、钻具参数及钻井液性能等有关,调整钻井参数,或使用水力加压器、扭转冲击器等工具可以减少振动。Boundary conditions of stick-slip vibrations and motion equations of bit were analyzed with establishing a theory analytical model with torsion pendulum,vibration mechanism and influence factors and movements of bit were researched.Results show that circulation accumulation of the cutting bit and friction between the string and the wall were primary causes of the stick-slip vibration,unstable forces of bit were primary cause of the PDC bits failure.Vibrations relate to drilling parameters,formation characteristics,drilling tools and properties of drilling fluid.Vibrations could be mitigated by changing the drilling parameters or adding a hydraulic pressure device or torsion impact.

关 键 词：PDC钻头 粘滑振动 理论模型 减振方法 

分 类 号：TE921.201[石油与天然气工程—石油机械设备]