Abstract
At present, the rod production system is difficult to meet the requirements of directional wells and cluster wells with large slant, the rod and pipe of these pumping wells suffer from serious wear, high energy consumption and low system efficiency. Downhole drive reciprocating pump production system, cancelling the sucker rob for transferring forces and motion, utilizing downhole submersible motor drives the reciprocating pump through the downhole drive mechanism, which can avoid the wear of the rod and pipe and improve the system’s efficiency. The composition and working principle of downhole drive reciprocating pump production system are introduced. The scheme of downhole drive reciprocating pump production system based on rack and pinion drive is analyzed in detail. The dynamic model of rack and pinion is established. By the dynamic simulation of the downhole transmission mechanism, the vibration loads of the mechanism with start up different accelerations are analyzed, and it is concluded that it is better to start with the variable acceleration. The scheme can reduce the vibration load caused by the motion inertia to the mechanism and improve the service life of the whole oil production system.
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