1·Plunger lift is a most efficient substituted technique to successive gas lift production. The key of the technique is control to the motion of plunger.
它是连续气举采油最有效的接替技术，技术的关键是对柱塞运动的控制。
2·Based on the mass and momentum conservations of fluid, the mathematical model of Two-Piece plunger lift and single-string pig lift which unload by pressing fluid level down is derived.
基于流体质量、动量守恒导出了单管球塞气举和分体式柱塞气举采用“压低液面”卸载的数学模型；
3·This paper introduced the principle and composition of the system of automatic control plunger lift. The using limits of the technology were given and the performance model was explained emphatically.
介绍了一种自动化控制的柱塞举升系统，并介绍了其工作原理和系统组成，给出了工艺的使用范围，着重阐述了动态模型。
4·The case history computation in-situ approves that the model has good dependability and can provide a theoretical base for optimum design of plunger gas lift.
经现场生产实例计算证实，该模型可靠性较高，为柱塞气举优化设计提供了理论基础。
5·Under the action of variation magnetic field, the permanent magnet moving-coil drives the plunger pump to move up and down and lift oil up to ground.
通过动力电缆给井下直线电机供电后产生交变磁场，永磁体动子在交变磁场作用下带动泵柱塞上下往复运动，从而达到举升抽油的目的。
6·Using hydraulic valve plunger interior unique structural design, but automatic control timing mechanism transmission gap, transmission lift of CAM change, punctual make and break tire valve.
利用液压挺杆内部独特的结构设计，可自动调节配气机构传动间隙、传递凸轮升程变化、准时开闭气门。