由于间隙很小，随极少油滴漏出，在密封面上的压降等于泵的压力。
Since the clearance is so small, the pressure drop across the seal faces, as the few drops flow out, is equal to the pump pressure.
泵是一种依靠液体压力传递能量的抽油系统。
Hydraulic piston pump supplies energy for the lift of downhole liquid by the hydraulic pressure.
吐哈油田自91年投产以来，随着油田的开发地层压力逐年下降而气油比呈急剧上升趋势，特别是温米油田出现了大批的高气油比油井，这给目前采用的有杆泵和电潜泵举升带来了一定的难度。
TUHA oil field has been putting into production in 1991, with the development of TUHA oil field, the reservoir pressure is dropping off, the gas oil ratio(GOR) is quickly rising.
该文介绍了油封机械泵的抽速与入口压力的关系、泵抽气效率下降的原因，指出泵入口管道的流导和油蒸汽逆流是造成泵抽速下降的主要原因。
Discusses the relationship between pumping speed and inlet pressure of an oil-sealed mechanical pump and the reason why its pumping efficiency drops down.
该文介绍了油封机械泵的抽速与入口压力的关系、泵抽气效率下降的原因，指出泵入口管道的流导和油蒸汽逆流是造成泵抽速下降的主要原因。
Discusses the relationship between pumping speed and inlet pressure of an oil-sealed mechanical pump and the reason why its pumping efficiency drops down.
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