摘要
小直径水平钻井在钻探中应用广泛,可以有效提高效率,降低成本。但钻柱与井壁之间存在较大的摩阻,导致出现托压现象,影响钻压传递,进而严重影响钻进效率。本文研究了一种基于涡轮-转阀驱动的小直径水力振荡减阻技术,通过振荡器的轴向振动,降低钻柱在钻井过程中所受阻力,提高钻进效率。文章从振动减阻器的研究现状、结构设计和实验结果等方面做了系统分析,得到实验结论:当泵排量相同时,振动频率越小,振幅越大,此时转速对压降影响较小。在转速保持不变的情况下,泵排量越大,振幅越大,且压降明显增加。这一研究成果可为该技术的发展提供一定参考。
Small diameter horizontal drilling is widely used because of its high efficiency and low cost.However,this technology faces a problem that a large friction exists between the drill string and the borehole wall,leading to the phenomenon of supporting pressure,thus affecting the transmission of WOB,and then seriously lowering the drilling efficiency.To solve this problem,this work proposes a small-diameter hydraulic oscillation drag reduction technology based on a turbine rotary valve drive.Through the axial vibration of the oscillator,the resistance of the drill string in the drilling process is reduced and the drilling efficiency is improved.This paper presents a systematic analysis of the research status,structural design and experimental results of the vibration reducers.Experiments show that when the pump displacement is the same,the smaller the vibration frequency is,the larger the amplitude is,and the speed has less impact on the pressure drop.The larger the pump displacement is,the larger the amplitude is,and the higher the pressure drop is.This research result provides a reference for the development of the technology.
作者
常腾腾
邹俊
王瑜
王志乔
夏柏如
CHANG Tengteng;ZOU Jun;WANG Yu;WANG Zhiqiao;XIA Bairu(School of Engineering and Technology,China University of Geosciences,Beijing 100083;Key Laboratory on Deep Geo-Drilling Technology of the Ministry of Natural Resources,Beijing 100083)
出处
《地质与勘探》
CAS
CSCD
北大核心
2020年第4期832-837,共6页
Geology and Exploration
基金
国家重点研究计划课题“小口径高效系列钻具研究”(编号:2018YFC0603404)
国家自然科学基金面上项目“深孔高温硬岩中涡轮钻进粘滑振动及其抑制机理研究”(编号:41572360)
中央高校基本业务费优秀教师基金项目“全金属动力钻具水力部件旋转振动模型研究”(编号:292018093)联合资助。
关键词
振荡减阻水力振荡器
小直径涡轮配流阀
设计研究
vibration drag reduction
hydraulic oscillator
small diameter
turbine
valve
design research
