1、

research on efficiency of the wellhead sealing device of pumping unit

抽油机井口密封装置效率的研究

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2、

preliminary investigation to efficiency of pumping system in wumishan reservoirs of renqiu oil field

任丘油田雾迷山油藏抽油机井系统效率初步探讨

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3、

The conventional method used to improve the efficiency of the sucker-rod pumping system increases pumping unit stroke, but now mostly pumping unit stroke can be adjusted to its maximum, only fewness have the room to adjust.

提高有杆泵抽油机系统效率最常用的措施就是增大冲程,但是目前绝大多数抽油机的冲程已经调到了最大值,只有少数抽油机仍有冲程调节余量。

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4、

Pumping recovery well has a low efficiency in system generally at present.

抽油机井目前普遍存在系统效率偏低的问题.

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5、

The confined aquifer is influenced by both heat transfer and groundwater flow during storing energy. The temperature field and head field will change a lot, which have an impact on pumping temperature and storage ratio, and then decrease the efficiency of heat pump system.

在储能过程当中,含水层受到地下水流动和传热的耦合影响,其温度场,压力场有较大的变化,进而对抽水温度和储能率造成影响,影响整个热泵系统的效率。

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6、

Belt Transmission Efficiency Analysis of Beam Pumping Units

游梁式抽油机皮带传动效率分析

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7、

The threshold pumping power is 3.5 W and pulse duration is 50 ns. The slope efficiency is as high as 20%.

激光输出模式为稳定的单纵模,抽运阈值功率为35W,脉冲宽度为50ns,斜率效率高达20%。

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8、

Harmful effect caused by rise in viscosity can be removed, pump efficiency may be raised, production period of oil well may be prolonged and oil production in period may be increased by pumping through variable? displacement in steam?

采用变排量抽油技术能消除因粘度升高造成的不利影响,提高泵效、延长油井生产周期、增加周期产油量。

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