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. 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, 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: 
 an above ground surface unit, further comprising 
 a fluid transfer means for transferring a fluid through one or more fluid-transfer tubes,  
 a pressure measuring means for measuring pressure on said fluid-transfer tubes  
 a fluid-transfer tube receiving means;  
   said fluid-transfer tubes, wherein 
 said tubes mate with said above ground surface unit at a first end and mate with a submersible downhole unit at a second end;  
   said submersible downhole unit, further comprising 
 an inner removable shell, where said inner removable shell houses a plurality of fluid transfer tubes, 
 a fluid-transfer tube receiving means, said fluid-transfer tube receiving means being reversibly mated with said fluid-transfer tube second end, and said fluid-transfer tube receiving means being located on either side of a power piston, said power piston, where said power piston is actuated between a first position and a second position by differential pressure exerted on either side of said power piston,  
 a connecting rod extending between said power piston and a production piston, where said connecting rod holds said power piston and said production piston in a fixed position with respect to one another,  
 a production piston, where said production piston is actuated between a first position and a second position by corresponding actuation of said power piston and connection rod,  
 a plurality of valves allowing for one-way flow of a production fluid as said production fluid cycles through said inner removable housing.  
 
   
     
     
         2 . The improved hydraulic downhole oil recovery system of  claim 1 , where 
 said inner removable shell further houses one or more apertures configured to allow production fluid to flow into said recovery system.    
     
     
         3 . The improved hydraulic downhole oil recovery system of  claim 1 , wherein 
 said fluid-transfer tubes are comprised of coil tubing.    
     
     
         4 . The improved hydraulic downhole oil recovery system of  claim 1 , wherein 
 said removable inner shell is comprised of coil tubing.    
     
     
         5 . The improved hydraulic downhole oil recovery system of  claim 1 , wherein 
 said fluid is water-based fluid.    
     
     
         6 . A method of using an improved hydraulic downhole oil recovery system comprising the steps of selecting: 
 an above ground surface unit, further comprising 
 a fluid transfer means for transferring a fluid through one or more fluid-transfer tubes,  
 a pressure measuring means for measuring pressure on said fluid-transfer tubes  
 a fluid-transfer tube receiving means;  
   said fluid-transfer tubes, wherein 
 said tubes mate with said above ground surface unit at a first end and mate with a submersible downhole unit at a second end;  
   said submersible downhole unit, further comprising 
 an inner removable shell, where said inner removable shell houses  
 a plurality of fluid transfer tubes,  
 a fluid-transfer tube receiving means, said fluid-transfer tube receiving means being reversibly mated with said fluid-transfer tube second end, and said fluid-transfer tube receiving means being located on either side of a power piston, 
 said power piston, where said power piston is actuated between a first position and a second position by differential pressure exerted on either side of said power piston,  
 a connecting rod extending between said power piston and a production piston, where said connecting rod holds said power piston and said production piston in a fixed position with respect to one another,  
 a production piston, where said production piston is actuated between a first position and a second position by corresponding actuation of said power piston and connection rod,  
 a plurality of valves allowing for one-way flow of a production fluid as said production fluid cycles through said inner removable housing.