Patent ID: 8511390

Claim:
A deliquification pump for deliquifying a well, comprising: a fluid end pump adapted to pump a fluid from a wellbore; a hydraulic pump adapted to drive the fluid end pump, the hydraulic pump having a central axis and including a housing having a first internal pump chamber and a first pump assembly disposed in the first chamber; a fluid conduit extending axially through the hydraulic pump, wherein the fluid conduit is adapted to supply the fluid to the fluid end pump; wherein the first pump assembly includes: a piston adapted to reciprocate axially relative to the housing, wherein the piston has a first end, a second end opposite the first end, and a throughbore extending between the first end and the second end; a first wobble plate including a planar end face axially adjacent the second end of the piston and a slot extending axially through the first wobble plate, wherein the slot is disposed at a uniform radius from the central axis and the end face is oriented at an acute angle relative to the central axis; wherein the first wobble plate is adapted to rotate about the central axis relative to the housing to axially reciprocate the piston and cyclically place the throughbore of the piston in fluid communication with the slot.