Patent ID: 8607880
Filing Date: 2013-12-17
Classification: E21B,F04B

Abstract:
1. An elongated plunger arrangement for moving up and down in a tubing string and a plunger lift system for an oil well and a gas well, the plunger having an upper portion, an intermediate portion and a lower portion, all of the portions having an elongated longitudinally directed cavity extending the full length of the plunger, the plunger also having a direction accelerating arrangement, the direction accelerating arrangement comprising: an elongated acceleration inducing ball and detent axial-position-securable shift rod extending through the elongated cavity, wherein the shift rod is longer than the elongated plunger so as to extend out beyond only one end of the plunger at a time, the shift rod having a cylindrical array of multiple bore openings in parallel alignment with one another in a valve body manifold slidably arranged within an enlarged chamber adjacent the upper end of the shift rod, an arrangement of circumferentially spaced-apart fluid flow permitting fins at the lower end of the shift rod, wherein fluid flows between the spaced-apart fins at the lower end of the shift rod and through the array of parallel, multiple bore openings the valve body manifold during a downward fall of the plunger arrangement; and a signal generator arranged in the lower end of the plunger in communication with a corresponding signal generator in the lower end of the well to effect movement of the shift rod.