煤层气水平井PE筛管完井用泵送工具推进力研究  

Research on the Driving Force of the Pumping Down Tool for a PE Screen Completion in CBM Horizontal Wells

作　　者：付利[1,2] 申思远[3] 王开龙 郑李 FU Li SHEN Siyuan WANG Kailong ZHENG Li(PetroChina Research Institute of Petroleum Exploration ＆ Development, Beij ing , 100083, Chi- na CNPC Drilling Research Institute, Beijing, 102206, China College of Petroleum Engineer- China University of Petroleum （Beijing）, Beijing, 102249, China)

机构地区：[1]中国石油勘探开发研究院,北京100083 [2]中国石油钻井工程技术研究院,北京102206 [3]中国石油大学(北京)石油工程学院,北京102249

出　　处：《石油钻探技术》2017年第1期68-72,共5页Petroleum Drilling Techniques

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

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。In order to efficiently design the parameters of the pumping down tool and to improve the pumping efficiency of PE screens,a study was conducted to investigate the effects of drilling fluid,drilling pipe and pumping down tool parameters on the driving force of pumping down tools by means of a CFD numerical simulation method based on the on-site operational conditions of CBM horizontal wells.It was shown that the fluid pressure at the pressurized ledge of pumping down tools was positive and the fluid pressure at the guiding surface was negative.In view of the opposite directions of the positive and negative force,their resultant force was the force to drive pumping down tools forward.The driving force on the pumping down tools increased by increasing the flow rate,viscosity and density of drilling fluid,but the effect of drilling fluid viscosity on driving force was much less than that of drilling fluid density and flow rate.The driving force on the pumping down tools decreased quickly at first and then slowly by increasing of the annular clearance between the drilling pipe and the pumping down tool,and decreased lineally by increasing the drainage orifice diameter.The effect of annular clearance on driving force was much more than that of drainage orifice diameter.Indoor investigation and field application indicated that the driving force produced by thispumping down tool was large enough to satisfy the field operation of PE screen completion.

关 键 词：煤层气 水平井 PE筛管 筛管完井 泵送工具 推进力 

分 类 号：TE925[石油与天然气工程—石油机械设备]