论文部分内容阅读
综合国外有关资料,目前国外无游梁抽油机主要有常规无游梁抽油机,井架式无游梁抽油机和缸式无游梁抽油机三种类型。现就这三种类型的无游梁抽油机作一简要介绍。常规无游梁抽油机
Based on the relevant information from abroad, there are three types of non-beam pumping units abroad: conventional non-beam pumping units, derrick beamless pumping units and cylinder beamless pumping units. Now these three types of beamless pumping unit for a brief introduction. Conventional beamless pumping unit