Hydraulic Pump-Drive Downhole Fluids Pump With Linear Driver

• US 20100116508A1
• Filed: 05/20/2008
• Published: 05/13/2010
• Est. Priority Date: 05/21/2007
• Status: Abandoned Application

• Current Assignee: Kenneth Doyle Oglesby
• Original Assignee: Kenneth Doyle Oglesby
• Inventors: Oglesby, Kenneth Doyle
• Application Number:
  US12/451,448
• Publication Number:
  US 20100116508A1
• Time in Patent Office: Days
• US Class Current: 166/369
• CPC Class Codes: E21B 43/128 Adaptation of pump systems with down-hole electric drives
• CPC Class Codes: F04B 47/06 having motor-pump units situated at great depth

Abstract

A downhole pump assembly for removing volumes of liquids, crude oils, gases, and produced waters, from oil or gas wells is described based on a downhole controllable electric drive, and a positive displacement pump, wherein the electric drive powers a hydraulic pump that powers the positive displacement pump.

Claims

1. A downhole pump assembly for removing volumes of liquids, crude oils, gases and produced waters from oil or gas wells to earth surface comprising:

a. a downhole controllable electric linear drive;

b. a hydraulic pump; and

c. a positive displacement type pump;

d. wherein said controllable electric linear drive drives said hydraulic pump and wherein said hydraulic pump drives said positive displacement pump.

2. The downhole pump assembly of claim 1 further comprising an energy storage device, said energy storage device being compressed by an upward movement of said controllable electric linear drive;

and said energy storage device being in mechanical communication with said hydraulic pump to then transmit downward motion to said hydraulic pump.

3. The downhole pump assembly of claim 2 wherein said energy storage device is selected from the group consisting of a drive spring, and a gas chamber.

4. The downhole pump assembly of claim 1 wherein said positive displacement pump is selected from the group consisting of a piston type, a plunger type, and a diaphragm/bladder type.

5. The downhole pump assembly of claim 1 wherein said controllable electric linear drive is selected from the group consisting of a permanent magnet synchronous machine (PMSM) type, and a synchronous reluctance machine (SRM) type.

6. The downhole pump assembly of claim 1 further comprising a combination of continuous coil tubing or strength cable and electric wiring connected to a top section of said downhole pump assembly;

said combination providing electronic communication for operation and capability for retrieval of pump assembly back to earth surface.

7. The downhole pump assembly of claim 1 further comprising electrically actuated techniques for equalizing pressures across seals and valves to enable retrieval of said downhole pump assembly.

8. A method of removing volumes of liquids, crude oils, gases and produced waters from oil or gas wells to earth'"'"'s surface comprising the steps of:

a. driving a downhole hydraulic pump by a controllable electric linear drive;

b. using said downhole hydraulic pump to drive a positive displacement pump to remove said volumes of liquids, crude oils, gases and produced waters from oil or gas wells to earth'"'"'s surface.

9. The method of removing volumes of liquids, crude oils, gases and produced waters from oil or gas wells to earth'"'"'s surface of claim 8 further comprising the steps of:

a. compressing an energy storage device with said controllable electric linear drive; and

b. transmitting motion to said downhole hydraulic pump with said energy storage device.

wherein said energy storage device can be a drive spring or a gas chamber.

10. The method of removing volumes of liquids, crude oils, gases and produced waters from oil or gas wells to earth'"'"'s surface of claim 8 further comprising the steps of equalizing pressures across seals and valves to enable retrieval of said downhole pump assembly.