Patent ID: 6193483
Filing Date: 2001-02-27
Classification: E21B,F04B

Abstract:
A full flow tubing stationary valve pump apparatus, comprising:(a) an outer annulus barrel;(b) an inner working barrel;(c) means for supporting said inner working barrel within said outer annulus barrel in radially inwardly spaced relation from said outer annular barrel so as to define a vertical flow annulus therebetween;(d) an elongated inner plunger disposed within and vertically movable by upstrokes and downstrokes relative to said inner working barrel;(e) a lower intake valve assembly spaced below said inner plunger and disposed within and supported by said outer annulus barrel; and(f) an upper discharge valve assembly disposed below said inner plunger and said inner working barrel and disposed within and supported by said outer annulus barrel above said lower intake valve assembly;(g) said outer annular barrel defining a working chamber between said lower intake valve assembly and said upper discharge valve assembly into which crude oil can be drawn through said lower intake valve assembly from a production formation therebelow and from which crude oil can be forced through said upper discharge valve assembly into said vertical flow annulus; thereabove;(h) said upstroke of said inner plunger causing said lower intake valve assembly to open and draw crude oil upwardly into said working chamber of said outer annular barrel; and(i) said downstroke of said inner plunger causing said upper discharge valve assembly to open and force flow of crude oil upwardly from said working chamber of said outer annular barrel.