摘要
粒子射流钻井技术能够有效解决深井与超深井钻井效率低的问题。基于文丘里效应相关理论,设计了井下自循环粒子射流钻井工具,建立了流体在工具内部流动的压力模型,分析模型因素对钻头喷嘴射流压力的影响。结果表明:流体的雷诺数与管壁粗糙度对能量损失影响最大,加速粒子所需要的能耗其次,固液之间摩擦能耗较小。随着上喷嘴直径、岩屑质量分数与岩屑直径的变大,射流压力先增加后减小,存在最优值;随着喉管直径的变大射流压力逐渐变小;喉管长度的大小对射流压力没有影响。
Particle jet drilling technology can effectively solve the problem of low drilling efficiency in deep and ultra-deep wells.Based on the theory of Venturi effect,a downhole self-circulating particle jet drilling tool was designed and a pressure model of the fluid flowing inside the tool was established.The influence of model factors on the jet pressure was also analyzed.The results show that Reynolds number of the fluid and the roughness of the pipe wall have the greatest influence on the energy loss.The energy consumption will require for accelerating the particle secondly.The energy consumption of friction between the solid and the liquid is small.With the diameter of the upper nozzle,the cuttings mass fraction and the cuttings diameter become larger.The jet pressure first increases and then decreases.There exists the optimal value.As the diameter of the throat increases,the jet pressure becomes smaller.The length of the throat has no effect on jet pressure.
作者
李世昌
闫立鹏
李建冰
白文路
杨秀丽
闫天宇
LI Shichang;YAN Lipeng;LI Jianbing;BAI Wenlu;YANG Xiuli;YAN Tianyu(Northeast Petroleum University,Daqing,Heilongjiang 163318,China;Sinopec Research Institute of Petroleum Engineering,Beijing 100101,China;The Third Oil Production Plant of Laojunmiao Oilfield,PetroChina,Yumen,Gansu 735000,China;Oil Recovery Engineering Research Institute,Daqing Oilfield Company Limited,Daqing,Heilongjiang 163001,China)
出处
《中国锰业》
2018年第3期98-102,共5页
China Manganese Industry
基金
国家科技重大专项(2016ZX05020-002)
国家重大专项(2016ZX05020-006)
