滑动钻进中水力振荡器对钻井提速的影响  

Influence of Hydraulic Oscillator on Drilling Speed-up in Sliding Drilling

作　　者：钟成兵 Zhong Chengbing(Sinopec Jianghan Petroleum Engineering Co.,Ltd.,Drilling Second Company,Wuhan 430074,China)

机构地区：[1]中石化江汉石油工程有限公司钻井二公司,武汉430074

出　　处：《科技通报》2022年第6期78-82,共5页Bulletin of Science and Technology

摘　　要：现场实践表明,水力振荡器可以有效减少滑动钻进过程的摩擦力,缓解托压问题。为了揭示水力振荡器与钻井提速之间的关系,本文考虑了摩擦力的非线性,建立了带水力振荡器的钻柱动力学模型,引入初始条件和边界条件,求解钻柱振动的有限差分方程,并给出具体的计算流程。将模型应用于实例研究,比较了带振动器和不带振动器的钻柱参数变化,并对水力振荡器的振幅、频率和安装位置进行了敏感性分析。计算结果表明,使用水力振荡器可以更好的降低摩擦力,有利于轴向力的传递;水力振荡器的振幅是影响钻井提速的主要因素,合适的安装位置和频率对钻井提速也有一定的效果,但效果不明显。因此,在安全钻进的情况下,应尽可能的增大水力振荡器的振幅。研究结果对水力振荡器的优选及钻井提速具有重要意义。Field practice shows that the hydraulic oscillator can effectively reduce the friction force and alleviate the pressure problem in the process of sliding drilling. Inorder to reveal the relationship between hydraulic oscillators and drilling acceleration, a dynamic model of drill string with hydraulic oscillator is established considering the nonlinear friction force. Introduce initial conditions and boundary conditions to solve the finite difference equation of drill string vibration, and the specific calculation process is given. The model is applied to a case study. The variation of drill string parameters with and without oscillators is compared, and the sensitivity analysis of amplitude, frequency and installation position of hydraulic oscillator is carried out. The calculation results show that the use of hydraulic oscillator can better reduce the friction force, which is conducive to the transmission of axial force. The amplitude of the hydraulic oscillator is the main factor affecting the drilling speed-up, and the appropriate installation position and frequency also have certain effects on the drilling speed-up, but the effect is not obvious. Therefore, in the case of safe drilling, the amplitude of the hydraulic oscillator should be increased as much as possible. The research results are of great significance for the optimization of hydraulic oscillators and drilling speed-up.

关 键 词：滑动钻进 水力振荡器 振幅 频率 安装位置 

分 类 号：TE21[石油与天然气工程—油气井工程]