水力振荡减阻钻进技术发展现状与展望

Development status and prospect of hydro-oscillation drag reduction drilling technology

孔令镕 王瑜 邹俊 王志乔 刘宝林 夏柏如

KONG Lingrong WANG Yu ZOU Jun WANG Zhiqiao LIU Baolin XIA Bairu

中国地质大学(北京)工程技术学院 自然资源部深部地质钻探技术重点实验室

School of Engineering and Technology, China University of Geosciences (Beijing), Beijing 100083, China Key Laboratory of Deep Geological Drilling Technology of Ministry of Natural Resources, Beijing 100083, China

随着水平井和大斜度井在油气开采中的广泛应用，钻进过程中钻柱与井壁之间摩阻较大时常产生托压现象，导致无法有效施加钻压，影响机械钻速，甚至诱发黏吸卡钻等井下事故。水力振荡减阻技术采用水力振荡器在钻具轴向产生一定频率和振幅的振动，将静摩擦力转变为动摩擦力，以减少钻具与井壁之间的摩阻，具有良好的发展前景。从振动减阻的原理、国内外水力振荡器典型结构、关键技术等方面系统分析了国内外水力振荡器的研究现状，指出现有水力振荡器存在的问题，提出应发展涡轮动力水力振荡器的建议，可为该技术的发展和提高提供参考依据。

As horizontal wells and extended reach wells are widely applied to oil and gas production, the resistance drag between the drill string and the borehole wall in the process of drilling is higher, leading to the occurrence of backing pressure. As a result, the weight on bit cannot be exerted effectively, the rate of penetration (ROP) is impacted and even downhole accidents are induced, e.g. pipe clogging, sucking or sticking. The hydro-oscillation drag reduction technology makes use of the hydro-oscillator to generate the vibration with a certain frequency and amplitude along the axial direction of the drilling tool to transform the static friction into the dynamic friction, so as to reduce the resistance drag between the drilling tool and the borehole wall. Its development prospect is promising. The domestic and foreign research status on hydro-oscillators was analyzed systematically from the aspects of the principles of vibrating drag reduction, the typical structures of domestic and foreign hydro-oscillators and the key technologies. Then, the problems of existing hydro-oscillators were pointed out. Finally, the suggestions on developing the turbine driven hydro-oscillator were proposed. The research results can provide the reference and basis for the development and improvement of the hydro-oscillation drag reduction technology.

10.13639/j.odpt.2019.01.005