煤层气水平井PE筛管完井用泵送工具推进力研究

发布时间：2018-07-25 10:26

【摘要】：针对煤层气水平井现场作业工况,为优化设计聚乙烯塑料筛管(PE筛管)完井用泵送工具参数,提高PE筛管的泵送效率,利用CFD数值模拟方法开展了钻井液性能参数、钻杆和泵送工具参数对泵送工具推进力影响的研究。结果表明,泵送工具承压抬肩处的流体压力为正压,引导头表面的流体压力为负压,二者方向相反,合力为泵送工具前行提供动力;泵送工具推进力随钻井液排量、黏度和密度增大呈增大趋势,但钻井液排量和密度对推进力的影响远大于钻井液黏度对推进力的影响;泵送工具的推进力随着泵送工具与钻杆内壁之间环空间隙增大先快速减小后缓慢减小,随泄流孔直径增大呈线性减小的趋势,环空间隙对推进力的影响远大于泄流孔直径对推进力的影响。室内研究与现场应用表明,该泵送工具能产生足够大的推进力,能满足PE筛管完井的现场作业要求。
[Abstract]:In order to optimize the parameters of pump tools for PE sieve pipe completion and improve the pumping efficiency of PE sieve pipe, the performance parameters of drilling fluid were developed by CFD numerical simulation method. Research on the influence of drill pipe and pump tool parameters on the propulsion force of pump tool. The results show that the pressure of the pump tool is positive and the pressure on the surface of the guide head is negative. In the opposite direction, it provides the power for the pump tool to move forward, and the propelling force of the pump tool depends on the displacement of the drilling fluid. The increase of viscosity and density shows an increasing trend, but the effect of drilling fluid displacement and density on the propulsion force is much greater than the influence of the drilling fluid viscosity on the propulsion force. The propelling force of the pump tool decreases rapidly first and then decreases slowly with the increase of the annulus gap between the pump tool and the inner wall of the drill pipe, and decreases linearly with the increase of the diameter of the drain hole. The influence of annular clearance on the propulsion force is much greater than that of the diameter of the discharge hole on the propulsion force. Laboratory research and field application show that the pump tool can produce enough propulsive force to meet the field operation requirements of PE sieve pipe completion.
【作者单位】：中国石油勘探开发研究院;中国石油钻井工程技术研究院;中国石油大学(北京)石油工程学院;
【基金】：国家科技重大专项“煤层气完井与高效增产技术及装备研制”课题1“煤层气完井技术及装备”(编号:2011ZX05037-001) 中国石油天然气集团公司重大科技专项课题“煤层气经济适用钻完井技术研究”(编号:2013E-2203JT)联合资助
【分类号】：TE925.3

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