论文部分内容阅读
垂直井眼的防斜打快是钻井过程中的工程技术难题之一,其本质一是通过工程技术手段使井眼垂直不偏斜,二是在保证井斜不超标的情况下尽量提高机械钻速。当前防斜理论与工具可以分为常规防斜钻具组合、高效防斜钻具组合和自动垂钻系统三大类。常规防斜钻具组合包括钟摆钻具组合、满眼钻具组合等传统防斜技术,这些技术在大量使用过程中取得了不错的效果,但在钻遇高陡构造等造斜能力强的地层时无法实现防斜与打快的统一。防斜技术的思路由静力学防斜向动力学防斜的转变,是典型的技术创新,如光钻铤防斜、偏心偏轴防斜钻具、反钟摆钻具组合等。自动垂钻系统可以在快速钻进的同时,将井斜控制在1°以内,完全实现了防斜打快的目标,但价格昂贵。
The anti-inclined drilling of vertical wellbore is one of the engineering and technical problems in the drilling process. The essence is that the borehole is vertical and not deflected by engineering and technical means and the other is to try to improve the ROP . The current anti-skew theory and tools can be divided into conventional anti-skew drill combination, high-efficiency anti-skew drill combination and automatic drill system. Conventional anti-skew drill assemblies include traditional anti-skew techniques such as pendulum drill assemblies and eye-drill combinations, all of which have achieved good results in large-scale use, but when drilling formations with high-steep structures such as steep formations Unable to achieve anti-ramp and play fast unity. Anti-inclined technology from the static anti-anti-oblique dynamic tilt anti-shift, is a typical technological innovation, such as anti-light drill collar anti-oblique, off-center eccentric anti-oblique drilling, anti-pendulum drill combination. Automatic vertical drilling system can be quickly drilling at the same time, the inclination to control less than 1 °, completely achieve the goal of anti-ramp fast, but expensive.