用于出砂井的水力喷射泵结构设计

油井出砂对地面设备和井下设备带来极大的危害。通过室内试验研究了地层砂在井筒内的流动和沉积状态,测定了不同粒径的砂粒沉降速度和一定液量下的极限携砂量。设计了应用在出砂井中的水力喷射泵采油装置,其特点是采用平行双管柱结构的水力喷射泵,合理设计泵内流道,尽可能保持液体匀速流动,适当提高液体流速,提高携砂能力。最后为防止液体停止流动导致砂堵排出管,设计了结构独特的沉砂管。

Structural design of hydraulic jet pump for sandy wells

Sand production of an oil well does great harm to the surface and downhole pumping equipment. The flow and deposition of the formation sand in the wellbore is tested in the lab. The sedimentation rate of sand particles with various diameters and the limited sand-carrying capacity at a certain production rate are determined. A hydraulic jet pump system for sandy wells is designed. This pumping system adopts a jet pump with a structure of parallel double-string. Flow passage with reasonable structure is designed to improve the sand-carrying capacity of the pump. And unique sand-settling pipe is also designed to prevent the sand from plugging the discharging pipe as fluid stops flowing.