Hydraulic downhole oil recovery system

Abstract

An improved hydraulic downhole oil recovery system that incorporates an above ground unit and a submersible, reciprocating downhole pump unit. This system, by pumping oil to the surface both during the upstroke and down-stroke, is able to continuously pump oil to the surface as not previously possible. Oil production is doubled with virtually no increase in energy consumption during operation. Water-based fluid, rather than hydraulic fluid, is responsible for actuating the reciprocating downhole pump unit. The water-based fluid is transferred through the system using coil tubing. The system further relies upon coil exterior production tubing to provide exceptional advantage in deviated oil wells.

1 . An improved hydraulic downhole oil recovery system, comprising: 
 a submersible downhole unit, comprising: 
 an inner removable shell housing;  
 a first power fluid transfer tube having a first and second end;  
 a second power fluid transfer tube having a first and second end;  
 power fluid;  
 a power piston housed within said inner removable shell, wherein said power piston is actuated between a first position and a second position by differential pressure exerted on either side of said power piston by said power fluid;  
 a power fluid transfer tube receiving means, said power fluid transfer tube receiving means being reversibly mated with said first and second power fluid transfer tube second ends, said power fluid transfer tube receiving means reversibly connected to said inner removable shell housing, said power fluid transfer receiving means being located on either side of said power piston;  
 a production piston, said production piston being located within said inner removable shell housing;  
 a connecting rod, said connecting rod being located between said power piston and said production piston, said connecting rod being configured to hold said power piston and said production piston in a fixed position with respect to one another, said production piston being configured for actuation between a first position and a second position by corresponding actuation of said power piston through said connection rod, said connecting rod being located within said inner removable shell housing;  
 a pump barrel seal, said pump barrel seal configured circumferentially around said connecting rod, wherein said pump barrel seal prevents cross-contamination between said power fluid and production fluid;  
 a first production fluid tube;  
 a second production fluid tube, wherein said second production fluid tube being configured to join said first production tube above and below said production piston, wherein production fluid is pushed through said first production fluid tube during a production piston upstroke, and wherein production fluid is pushed through said second production fluid tube during a production piston down-stroke;  
 a first aperture, said first aperture configured for drawing production fluid into said inner removable shell housing above said production piston;  
 a second aperture, said second aperture configured for drawing production fluid into said inner removable shell housing below said production piston;  
 a plurality of valves, said plurality of valves being configured for allowing one-way flow of production fluid as said production fluid cycles through said downhole submersible unit; and  
   an above ground surface unit, comprising: 
 a fluid pumping means;  
 a pressure measuring means for measuring pressure on said first and second power fluid transfer tubes; and  
 a power fluid transfer tube initiating means, wherein said power fluid transfer tube initiating means reversibly mates with said first end of said first and second power fluid transfer tubes.  
   
   
   
       2 . The improved hydraulic downhole oil recovery system of  claim 1 , wherein said first and second power fluid transfer tubes are comprised of coil tubing.  
   
   
       3 . The improved hydraulic downhole oil recovery system of  claim 1 , wherein said removable inner shell housing is comprised of coil tubing.  
   
   
       4 . The improved hydraulic downhole oil recovery system of  claim 1 , wherein said power fluid is water-based.  
   
   
       5 . The improved hydraulic downhole oil recovery system of  claim 1 , wherein said pump barrel seal is comprised of a metallic substance.  
   
   
       6 . The improved hydraulic downhole oil recovery system of  claim 1 , wherein the size of said power piston may be varied for maximum operation.  
   
   
       7 . The improved hydraulic downhole oil recovery system of  claim 1 , wherein the size of said production piston may be varied for maximum operation.  
   
   
       8 . The improved hydraulic downhole oil recovery system of  claim 1 , wherein said power piston is comprised of a solid, metallic material.  
   
   
       9 . The improved hydraulic downhole oil recovery system of  claim 1 , wherein said production piston is comprised of a solid, metallic material.