US2016024898A1PendingUtilityA1

Oil Well Pump Apparatus

51
Individually held — no corporate assignee on recordPriority: Feb 21, 2003Filed: Feb 24, 2015Published: Jan 28, 2016
Est. expiryFeb 21, 2023(expired)· nominal 20-yr term from priority
Inventors:Raymond C. Davis
F01C 13/04F04C 11/003F04C 13/008F04C 2/10E21B 43/129F04C 2210/24F04C 2210/12F04C 2210/10F04C 2/12F04C 2/102F04C 2240/806F04C 2240/30
51
PatentIndex Score
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Cited by
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References
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Claims

Abstract

An oil well pumping apparatus for pumping oil from a well to a wellhead provides a tool body that is sized and shaped to be lowered into the production tubing string of the oil well. A working fluid is provided that can be pumped into the production tubing. A prime mover is provided for pumping the working fluid. A flow channel into the well bore enables the working fluid to be circulated from the prime mover via the production tubing to the tool body at a location in the well and then back to the wellhead area. A pumping mechanism is provided on the tool body, the pumping mechanism including upper and lower spur gear or gears. The upper spur gear is driven by the working fluid. The lower spur gear is rotated by the first spur gear. The upper and lower spur gears are connected with a common shaft. If upper pairs and lower pairs of spur gears are employed, each upper and lower gear are connected via a common shaft. The tool body has flow conveying portions that mix the working fluid and the produced oil as the oil is pumped. The pumping mechanism transmits the commingled fluid of oil and working fluid to the wellhead area where they are separated and the working fluid recycled.

Claims

exact text as granted — not AI-modified
1 . An oil pump apparatus for pumping oil from an oil well having a wellhead and a well bore with casing and a production tubing string, comprising:
 a) a tool body that is sized and shaped to be lowered into the production tubing string of an oil well;   b) a casing and production tubing;   c) a working fluid that can be pumped into the production tubing;   d) a prime mover for pumping the working fluid;   e) a flow channel in the well bore that enables the working fluid to be circulated from the prime mover via the production tubing to the tool body at a location in the well and then back to the wellhead area;   f) a pumping mechanism on the tool body, the pumping mechanism including a first impeller that is driven by the working fluid and a second impeller that is rotated by the first impeller, the second impeller pumping oil from the well via the tool body;   g) wherein the working fluid flows downwardly through the first impeller;   h) wherein the tool body has flow conveying portions that mix the working fluid and the oil as the oil is pumped; and   i) wherein the pumping mechanism transmits the commingled fluid of oil and working fluid to the wellhead area.   
     
     
         2 . The oil pump apparatus of  claim 1  further comprising a filter in the tool body that is positioned to filter the working fluid before it reaches the pumping mechanism. 
     
     
         3 . The oil pump apparatus of  claim 1  further comprising a filter in the tool body that is positioned to filter the oil being pumped before it reaches the pumping mechanism. 
     
     
         4 . The oil pump apparatus of  claim 1  wherein the working fluid is water or oil or a mixture of oil and water. 
     
     
         5 . The oil pump apparatus of  claim 1  wherein the working fluid is a fluid mixture of oil and water. 
     
     
         6 . The oil pump apparatus of  claim 1  wherein the working fluid is oil. 
     
     
         7 - 14 . (canceled) 
     
     
         15 . An oil pump apparatus for pumping oil from an oil well having a wellhead and a well bore with casing and a production tubing string, comprising:
 a) a tool body that is sized and shaped to be lowered into the production tubing string of an oil well;   b) a casing and production tubing;   c) a working fluid that can be pumped into the production tubing;   d) a prime mover for pumping the working fluid;   e) a flow channel in the well bore that enables the working fluid to be circulated from the prime mover via the production tubing to the tool body at a location in the well and then back to the wellhead area;   f) a pumping mechanism on the tool body, the pumping mechanism including a first gerotor device that is driven by the working fluid and a second gerotor device that is powered by the first gerotor device, the second gerotor device pumping oil from the well via the tool body, each gerotor device having an inner rotor having multiple lobes that interfaces with an outer rotor having more lobes than the inner rotor;   g) wherein the tool body has flow conveying portions that mix the working fluid and the oil as the oil is pumped; and   h) wherein the pumping mechanism transmits the commingled fluid of oil and working fluid to the wellhead area.   
     
     
         16 . The oil pump apparatus of  claim 15  further comprising a filter in the tool body that is positioned to filter the working fluid before it reaches the pumping mechanism. 
     
     
         17 . The oil pump apparatus of  claim 15  further comprising a filter in the tool body that is positioned to filter the oil being pumped before it reaches the pumping mechanism. 
     
     
         18 . The oil pump apparatus of  claim 15  wherein the working fluid is water or oil or a mixture of oil and water. 
     
     
         19 . The oil pump apparatus of  claim 15  wherein the working fluid is a fluid mixture of oil and water. 
     
     
         20 . The oil pump apparatus of  claim 15  wherein the working fluid is oil. 
     
     
         21 . The oil pump apparatus of  claim 15  further comprising a swab cup on the tool body that enables the tool body to be pumped to the well head area using the working fluid. 
     
     
         22 . The oil pump apparatus of  claim 15  further comprising a swab cup on the tool body that enables the tool body to be pumped into the well bore via the production tubing string using the working fluid. 
     
     
         23 . The oil pump apparatus of  claim 15  further comprising a check valve positioned on the tool body above the pumping mechanism that prevents oil flow inside the tool body above the pumping mechanism. 
     
     
         24 . The oil pump apparatus of  claim 15  further comprising a check valve positioned below the pumping mechanism that prevents the flow of the working fluid inside the tool body to a position below the tool body. 
     
     
         25 . The oil pump apparatus of  claim 1  wherein the impellers include upper and lower impellers connected by only one common shaft. 
     
     
         26 . An oil pump apparatus for pumping oil from an oil well having a wellhead and a well bore with casing and a production tubing string, comprising:
 a) a tool body that is sized and shaped to be lowered into the production tubing string of an oil well;   b) a casing and production tubing;   c) a working fluid that can be pumped into the production tubing;   d) a prime mover for pumping the working fluid;   e) a flow channel in the well bore that enables the working fluid to be circulated from the prime mover via the production tubing to the tool body at a location in the well and then back to the wellhead area;   f) a pumping mechanism on the tool body, the pumping mechanism including a first impeller that is driven by the working fluid and a second impeller that is rotated by the first impeller, the second impeller pumping oil from the well via the tool body;   g) wherein the tool body has flow conveying portions that mix the working fluid and the oil as the oil is pumped; and   h) wherein the pumping mechanism transmits the commingled fluid of oil and working fluid to the wellhead area.   
     
     
         27 - 28 . (canceled) 
     
     
         29 . The oil pump apparatus of  claim 26  wherein the working fluid is water or oil or a mixture of oil and water. 
     
     
         30 . The oil pump apparatus of  claim 26  wherein the working fluid is a fluid mixture of oil and water. 
     
     
         31 . The oil pump apparatus of  claim 26  wherein the working fluid is oil. 
     
     
         32 . The oil pump apparatus of  claim 26  further comprising a swab cup on the tool body that enables the tool body to be pumped to the well head area using the working fluid. 
     
     
         33 - 35 . (canceled) 
     
     
         36 . The oil pump apparatus of  claim 26  further comprising a check valve on the tool body that prevents oil flow inside the tool body above the pumping mechanism. 
     
     
         37 . (canceled) 
     
     
         38 . The oil pump apparatus of  claim 26  wherein the impellers include upper and lower impellers connected by a common shaft. 
     
     
         39 - 40 . (canceled)

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