新型XPJQ系列下套管漂浮减阻器的研制与试验

为有效减小大位移井、长水平段水平井的套管下入阻力，保证套管的安全下入，研制开发了新型XPJQ系列下套管漂浮减阻器。基本的技术思路是，依据套管在下入过程中的受力大小、状态及影响因素，利用漂浮接箍或漂浮减阻器实现对水平段套管内部全掏空，以有效降低套管正压力、减小套管下入摩擦阻力。根据漂浮下套管技术及固井技术的要求，研制开发的新型下套管漂浮减阻器由1个主部件（漂浮减阻器）和4个辅助部件（可钻式防落物浮箍、高承压漂浮旋流鞋、剪销式套管清理器、防转碰压塞）组成。下套管漂浮减阻器地面试验表明，各功能都运行平稳，各项技术参数均达到设计要求。在胜利油田胜2-平17井的现场试验也表明，各部件工作正常，可实现漂浮功能。研究认为，新型XPJQ系列下套管漂浮减阻器性能可靠，可在大位移井、长水平段水平井推广应用。 

Developing and Testing XPJQ Series Floating Friction Reducers for Running Casing

In order to effectively reduce the friction which occurs when running casing in extended-reach wells,and in long sections of horizontal wells,to ensure casing is run into the planed formation,a new casing floating friction reducer was developed.It can effectively reduce the friction generated when running casing,and ensure safer operations.The concept and the procedures were based on the principle that keeps the inside of casing empty by a floating friction reducer,so as to reduce the weight of casing and friction caused by running casing.According to the casing floating technology and requirements of cementing,a main part and four auxiliary components of floating system were developed,which include the floating friction reducer and a drillable float collar used for isolating falling articles,a high pressure whirling float shoe,a shear-pin type casing cleaner and an anti-rotation bump plug.The floating friction reducer was tested at both surface and the Well Sheng 2-Ping 17,Shengli Oilfield,and it showed that each component worked properly and that floating founction was achieved.The successful development of a floating friction reducer for casing can result in successful applications in extended reach wells and in the long section of horizontal wells.