论文部分内容阅读
考虑钻具沿井深和井眼圆周方向的随机接触摩擦以及钻具在钻压、自重作用下的纵向弯曲,建立起小井眼下部钻具双重非线性力学分析模型,运用空间梁单元和多向接触摩擦间隙元进行求解。经现场试验表明:用该理论方法所设计组配的三稳定器和四稳定器防斜钻具组合起到了良好的防斜效果,机械钻速得到明显提高,为小井眼钻具设计提供了一种实用的计算方法。
Considering the random contact and friction between the wellbore along the wellbore and the circumferential direction of the borehole and the longitudinal bending of the drill under the action of weight-on-bit and self-weight, a dual nonlinear mechanical analysis model of the lower part of the borehole is established. By using the spatial beam element and multi-directional contact Friction gap elements to solve. The field test shows that the combination of the three stabilizer and the four stabilizer anti-skew drilling tool designed by the theoretical method has good anti-skew effect, and the ROP has been obviously improved, providing a A practical method of calculation.