摘要
常规的油气田开发已不能满足人们需求,油气开发向更复杂的地层方向发展。在水平井、大位移井等复杂结构井的油气勘探开发中,井眼轨迹难以控制、机械钻速低、钻柱托压等问题会给钻井过程带来很大的挑战。为解决上述问题,本文设计了一种负压脉冲水力振荡工具用于减小水平井、大位移井的摩擦阻力,详细分析了负压脉冲振荡工具结构原理。利用运动学分析结果对负压脉冲水力振荡器的水力学特性进行分析,结合相关算例参数,得出当输入工具的流体流量一定,阀轴系统径向喷嘴直径越大,工具的压降和产生的水击压强越大,产生的轴向力冲击力也越大。并通过有限元流体仿真分析结果验证理论计算的准确性,为负压脉冲水力振荡器工具今后的现场应用选型和钻井提速提供理论依据。
Conventional development of oil and gas fields can no longer meet the needs of people.In the exploration and development of horizontal wells,large displacement wells and other complicated wells,some problems such as difficult to control the well trajectory,low the rate of mechanical penetration and the support pressure of the drill string will bring great challenges to the drilling process.In order to solve the above problems,a negative-pressure pulsed hydraulic oscillator tool is designed to reduce the friction resistance of horizontal wells and large-displacement wells,and the structural principle of negative-pressure pulsed oscillating tool is analyzed in detail.The hydrodynamic characteristics of the negative pressure pulsed hydraulic oscillator are analyzed by using the kinematic analysis results,and combined with the relevant example parameters.Results show that when the fluid flow of the input tool is constant,the larger the radial nozzle diameter of the valve shaft system,the greater the pressure drop of the tool and the water hammer pressure generated,so the greater the axial force impact force generated.The accuracy of the theoretical calculation is verified by the results of finite element fluid simulation,which provides a theoretical basis for the field application selection and drilling acceleration of the negative-pressure pulsed hydraulic oscillator tool in the future.
作者
田家林
葛桐旭
胡志超
杨毅
TIAN Jialin;GE Tongxu;HU Zhichao;YANG Yi(The Ministry of Education Key Laboratory of Oil and Gas Equipment,School of Mechatronic Engineering,Southwest Petroleum University,Chengdu 610500,China)
出处
《机械科学与技术》
CSCD
北大核心
2022年第5期657-665,共9页
Mechanical Science and Technology for Aerospace Engineering
关键词
负压脉冲
振动
钻柱动力学
水击特性
negative pressure pulse
vibration
drill string dynamics
water hammer characteristics
