本文介绍一种无游梁长冲程抽油机,它可用于开采溶解气体含量高的重质原油。该抽油机靠液压驱动和电子控制,故能很好地控制抽油杆和柱塞的加速度和速度。为适应不同的操作条件,其上下冲程长度是单独进行调整的,并能方便地加以改变。因此,其容积效率高,部件寿命长。另外,该抽油机结构紧凑,重量轻,易于安装在现有的海上平台。 This article describes a beamless long stroke pumping unit that can be used to extract heavy crude oil with high dissolved gas content. The pumping unit is hydraulically powered and electronically controlled so that the sucker rod and plunger accelerations and velocities are well controlled. In order to adapt to different operating conditions, the length of the upper and lower stroke is adjusted separately and can be easily changed. Therefore, its volumetric efficiency, long component life. In addition, the pumping unit is compact, light weight and easy to install on existing offshore platforms.