双变径轮式抽油机是在继承常规游梁式抽油机优点的基础上设计而成的大载荷、长冲程、低冲次节能型抽油机。

A dual variable-diameter wheel pumping unit, which has long stroke and low pumping speed and large load capacity, is designed based on conventional beam pumping units.

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以抽油杆柱为研究对象，论述了斜直井游梁式抽油机冲程和冲次的计算方法。

Taking the rod string as the object of study, a method of computing pumping stroke and speed of walking beam pumping units for slant straight wells is also presented.

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强：中长游，我们可以看看周围，并且不会感到冲，但它太贵。

Qiang: In a long tour we can look around and not feel rushed, but it's too expensive.

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