阐述了试制的ＳＨＢ６２×１０／５０ＳＨ型四活塞水力泵的结构、工作原理、技术特点和主要性能参数的设计，介绍了该型泵在中深井的现场试验情况。结果证明，试制泵具有深抽、降压、增液等优点，在地面操作压力１７ＭＰａ下，该型泵理论扬程可达５０００ｍ，特别适用于我国油田中深井、深井油藏的中后期开采，也能满足我国新疆西部塔里木油田超深井采油的需要。 The structure, working principle, technical characteristics and main performance parameters of the prototype SHB62 × 10 / 50SH four-piston hydraulic pump are illustrated. The field test of the pump in medium and deep wells is introduced. The results show that the prototype pump has the advantages of deep pumping, depressurization and liquid addition. Under the operating pressure of 17MPa, the theoretical lift of this pump can reach 5000m, which is especially suitable for middle and late-stage exploitation of medium- and deep-well oil reservoirs in China. It can meet the needs of ultra-deep well oil production in Tarim Oilfield in western Xinjiang.