水力振荡器在中深定向井提速提效中的应用

Application of Hydraulic Oscillator in the Speed-Up and Efficiency Enhancement of Medium-Deep Directional Well Drilling

随着勘探开发的不断深入，东部老油田苏皖油区中深定向井、大位移井越来越多。针对中深定向井、大位移井中常见的定向段托压、黏卡严重，使用PDC钻头钻进时工具难以稳定，钻压无法真实有效传递等问题，开展了使用水力振荡器提高机械钻速的研究。对水力振荡器技术原理、组成、工作原理进行了分析，在H159．7、HX161、HX162等井成功应用。实践表明，利用水力振荡器将钻具的静摩擦变为动摩擦，可以有利于解决中深定向井、大位移井中定向段托压情况和钻压不能有效传递的问题。为破解中深定向井提速难题提供了借鉴，经济效益也随着滑动进尺的增加而逐步提高。

With the continuous deepening of oilfield exploration, more and more medium-deep directional wells and large displacement wells were drilled in the eastern ]iangsu-Anhui Oil Region. In order to solve the problems, such as supporting pressure in directional sections, serious drill pipe sticking, instability of tool in drilling with PDC bit and the ineffective transmission of WOB and so on, a hydraulic oscillator was used to improve the penetration rate of these wells. The principle, composition and the working principle of hydraulic oscillator were analyzed, and it was success- fully applied in Wells H159-7, HX161 and HX162. Application shows that the static friction of drilling tool being turned into the dynamic friction by using the hydraulic oscillator is beneficial for solving the problems stated above. It provides reference for solving the problem of speed-up in directional well drilling, the drilling efficiency is raised with the increase of sliding footage.