1、 摘 要 抽油机是指能把流体从地下抽出的装置。 曲柄的旋转运动被改变成被固定在曲 柄的一端的连杆臂的一双灵活的机构的往复运动并且曲柄的另一端通过这样的 连接绕过多个滚筒延伸，然后垂直向下朝向井头。灵活的机构在其另一端以一定 装置被连接到到光杆。灵活的机构和光杆，基于在同一垂直平面，因此，真正的 垂直往复运动便传递给光杆。灵活的机构包括非金属肩带，有相当的宽度，以提 供稳定的运动。多年来，油从地表下方的一个领域以抽油机的方式被抽出，这种 方式是由抽油机的往复光杆连接到由钻具操作的潜水泵来实现的。 不同类型的抽 油机都是合适的， 本发明涉及到一个抽油机以便于合理地应用在操作一个泵去把 液体从地下抽
2、到地表的领域，如石油，是低于地表的领域并且由于抽油机的低姿 态尤其在具有中心支点的喷灌系统领域中抽油机是很有效的。 关键词关键词：抽油机；曲柄；机构 Abstract A pumping unit for pumping fluids from a location beneath the surface of a field. The rotary motion of a crankarm is changed to a reciprocating motion of a pair of flexible members by pitman arms pivotally secured at
3、 one end to the crankarm and at the other end to the flexible members which extend from such connection over a plurality of rollers and then vertically downward toward the well head.The flexible members are connected at their other ends to means connected to the polished rod.Portions of the flexible
4、 members and the polished rod lie in the same vertical plane so that true vertical reciprocating movement is imparted to the polished rod.The flexible members comprise non-metallic straps having a substantial width to provide stability of movement. For many years, oil from beneath the surface of a field has been pumped by means of a pumping unit .which reciprocates a polished rod connected to a drill string to operate a submerged pump. This invention relates to a pumping unit suitable for use i
