智能井液压控制系统流体瞬变特性分析  

Fluid Transient Performance Analysis of Intelligent Well Hydraulic Control Pipeline

作　　者：熊浪 何东升[1] 栾京生 李若岚 郑家乐 XIONG Lang;HE Dongsheng;LUAN Jingsheng;LI Ruolan;ZHENG Jiale(School of Mechatronic Engineering,Southwest Petroleum University,Chendu Sihuan 610500,China)

机构地区：[1]西南石油大学机电工程学院,四川成都610500

出　　处：《机床与液压》2023年第20期179-186,共8页Machine Tool & Hydraulics

基　　金：“十三五”国家科技重大专项(2016ZX05028-001-006)。

摘　　要：智能井液压控制管线处于一个温度变化复杂的环境,并且液压油中含有少量气体,直接影响管线内流体特性,从而影响管线内压力、流量压力信号的准确性及潜在水锤问题的压力波动,甚至会导致井下液压控制工具无法正常作业。传统分析管道系统一维瞬变流建立在不考虑热交换即温度变化条件下,导致计算出来的末端压力值与末端水锤压力误差较大。为此,在传统瞬变流方程计算基础上,考虑温度变化及含气量对液压油密度、黏度及体积模量等因素的影响,优化具有显著温度变化的井下控制管线瞬变流计算模型。并以32号液压油为例,采用特征线法对井下管线非恒温瞬变流模型进行一维计算,对比分析受地温梯度影响下不同温度及含气率下末端压力流量信号和产生水锤时压力波动变化情况,为求解非恒温管线瞬变流提供一种思路,并且所求得的数值结果可为智能井流量控制阀开度动作精确控制及解码器系统水锤防护提供参考。Intelligent well hydraulic control pipeline temperature changes in a complex environment,and the hydraulic oil contains a small amount of gas,directly affecting fluid properties in the line,which affects the pressure in the pipeline,the accuracy of the flow pressure signal and pressure fluctuations caused by potential water hammer problem,even leads to downhole hydraulic control tool can t normal operation.The conventional one-dimensional transient flow analysis of pipeline system is established without considering heat exchange or temperature change,which results in a large error between the calculated end pressure value and the end water hammer pressure.Therefore,on the basis of the traditional transient flow equation calculation,considering the influence of temperature change and gas content on hydraulic oil density,viscosity and volume modulus,the transient flow calculation model of downhole control pipeline with significant temperature change was optimized.Taking No.32 hydraulic oil as an example,one-dimensional calculation of the non-constant temperature transient flow model of underground pipeline was carried out by using the characteristic line method,and the end pressure flow signal and pressure fluctuation when water hammer was generated with different temperature and gas content under the influence of geothermal gradient were comparatively analyzed.It provides an idea for solving transient flow in non-constant temperature pipeline,and the numerical results can provide a reference for accurate control of opening action of intelligent well flow control valve and water hammer protection of decoder system.

关 键 词：地温梯度 非恒温瞬变流 含气率 末端压力响应 水锤问题 

分 类 号：TH137[机械工程—机械制造及自动化]