七十年代出现的一种新型采油装置——喷射泵。该泵是根据文吐里原理而进行设计的。泵本身分成三部分:喷嘴、喉管和扩散段。该泵本身没有机器零件之间的相对运动,因此在含砂量较多的井中获得了应用。但是,由于含砂液流对于喉管的冲蚀,寿命很短。一般硬质合金的喉管只能在井下工作3天。所以,大量推广遇到了困难。 In the seventies a new type of oil extraction device - jet pump. The pump is designed based on the Venturi principle. The pump itself is divided into three parts: nozzle, throat and diffuser. The pump itself has no relative movement between machine parts and is therefore used in wells with a high sand content. However, due to the erosion of the throat by the sandy flow, the life is short. General hard alloy pipe can only work in the well for 3 days. So, a lot of promotion encountered difficulties.