Dynamic, automatic stroke reversal system for reciprocating, linearly driven pumping units

摘要: This pneumatic stroke reversal system for reciprocating, linearly driven pumping units is completely automatic in its cyclic operation, and greatly improves efficiency. A smaller drive motor required because kinetic energy stored at the end of each stroke, to be returned assist beginning accelerating following smooth controlled reversals allow a substantially higher velocity production from unit given size. The are effective on both upstroke downstroke, their maximum net values individually selectable over wide range, adjustable field. exact points direction change occur instant rod stretch contraction, respectively, thereby reducing parasitic string oscillation, pressure peaks on, problems with, string. subject beneficial long stoke hydraulic units, it also makes possible very efficient economical short greater which made possible. uncomplicated flexible application, requires few moving parts, can used any number embodiments.