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在稠油开采中,抽油杆在液体中运动时,所受到的摩擦阻尼力很大,有时高达几十千牛。上冲程时,该力有加大悬点载荷的作用;下冲程时,该力使抽油杆下行困难,甚至悬点载荷为零。为了开采稠油,必须根据其特点设计适应的游梁式抽油机。文章分析了稠油用抽油机的受力特点,提出了该类抽油机的设计要求。
In the heavy oil extraction, sucker rod in the liquid movement, the frictional damping force suffered by a great, sometimes up to tens of thousands of cattle. On the stroke, the force has to increase the role of hanging point load; under the stroke, the force makes the rod down difficult, or even hanging point load is zero. In order to produce heavy oil, an adaptive beam pumping unit must be designed according to its characteristics. The paper analyzes the force characteristics of heavy oil pumping unit, and puts forward the design requirements of such pumping units.