将机械式直线加速器用于采油机械的设想

摘要

Mechanical linear accelerator is a new transmission devicedesigned on the basis of the parallel straight push rod linear reducer. To make use of its acceleration and stroke increment functions, an idea of applying the mechanical linear accelerator to oil pumping system is put forward. The design schemes for long stroke pumping unit and downhole stroke increment device both equipped with the mechanical linear accelerator are presented. The long stroke pumping unit with the linear accelerator is easy to realize compound balance and is predicted to have high mechanical efficiency and long service life. The downhole stroke increment device with the linear accelerator can increase the stroke of the subsurface pump plunger, therefore it provides the condition for modifying the existing pumping systems to long stroke pumping systems.%机械式直线加速器是根据平行直动推杆传动机构设计而成的新型传动装置，利用其加速和增程功能，提出两种采取对称布置的直线加速器实现长冲程、低冲次的抽油装置设计新方案：(1)采用直线加速器的长冲程抽油机，其结构合理，便于实现复合平衡，预计有较高的机械效率和较长的使用寿命；(2)采用直线加速器的抽油机井下增程装置，可使地面设备结构紧凑，比同类型长冲程抽油机的悬点载荷相对较低，对现有抽油机实施长冲程改造有着重要的实际意义。