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HB-25型井口射流泵（简称为井口泵），是我局自行设计研制成功的新型射流泵。最大吸程为10.3米，纯排水量为昼夜4～170吨。它的设计以一般射流原理为依据，但为了适用于地面射流抽水的需要，在射流泵结构和主要技术参数等方面进行了重大改进。由于井口泵的试验成功，解决了浅孔抽水难的问题，同时还解决了Bw250/50泥浆泵吸程低（规定吸程3米），不能满足浅孔抽水的需要。现配上井口泵后使250/50泥浆泵扩大了应用范围，提高了设备的利用率。
HB-25-type wellhead jet pump (referred to as the wellhead pump), is designed and manufactured by our bureau a new type of jet pump. The maximum suction is 10.3 meters, pure displacement of 4 to 170 tons day and night. Its design is based on the general jet principle, but significant improvements have been made to the jet pump structure and major technical parameters in order to be suitable for ground jet pumping. Because of the successful test of the wellhead pump, it solves the difficult problem of shallow hole pumping, and also solves the low pumping suction stroke of Bw250 / 50 mud pump (stipulated suction lift of 3 meters), which can not meet the needs of shallow hole pumping. Now coupled with the wellhead pump 250/50 mud pump to expand the scope of application, improve the utilization of equipment.