Horizontal steam generator for oil wells

• US 5,142,608 A
• Filed: 04/29/1991
• Issued: 08/25/1992
• Est. Priority Date: 04/29/1991
• Status: Expired due to Term

• Current Assignee: Meshekow Oil Recovery Corporation
• Original Assignee: Meshekow Oil Recovery Corporation
• Inventors: Meshekow, Robert L.
• Primary Examiner(s): Reynolds, Bruce A.
• Assistant Examiner(s): Jeffery, John A.
• Application Number:
  US07/692,898
• Time in Patent Office: 484 Days
• Field of Search: 392/301-303, 392/324, 392/325, 392/338, 392/394, 392/397, 166/302, 166/303, 166/50, 166/60, 166/59, 166/57, 175/16, 175/17, 175/283, 175/284, 175/231, 175/424, 165/45, 405/131
• US Class Current: 392/303
• CPC Class Codes: E21B 36/006 Combined heating and pumping means
• CPC Class Codes: E21B 36/04 using electrical heaters
• CPC Class Codes: E21B 43/305 comprising at least one inclined or horizontal well
• CPC Class Codes: F22B 1/30 Electrode boilers
• CPC Class Codes: F24H 1/225 electrical central heating boilers
• CPC Class Codes: H05B 3/82 Fixedly-mounted immersion heaters

Abstract

A downhole steam and hot water generator for use in other than a non-vertical oil well casing and particularly adapted for use in horizontal drilled wells that includes an elongated housing with a front and rear end, fluid discharge apparatus positioned in the upper portion of said housing connected to an upper chamber therein, water distribution apparatus associated with the housing to pass water into the lower portion of the housing, and electrodes within said water to boil or vaporize water into steam for transfer to a horizontal petroleum pool to reduce the viscosity of the petroleum for pumping.

Claims

1. In a horizontal steam or hot water generator for use in non-vertical drilled oil wells having an annular-walled housing with an elongated axis adapted to pass down from ground level through a relatively small diameter casing having openings therein and cable means to raise and lower said generator in the casing to an area wherein said elongated axis is generally horizontal and to an area where it is desired to apply steam or hot water through the opening in the casing into a generally elongated horizontal petroleum pool, the improvement comprising:

said annular-walled housing having a front and a rear end to close said housing and said elongated axis runs between said ends and said length of said housing is greater than the diameter of said housing when said housing is in an operating position, and said housing having an elongated upper chamber between said ends for steam or boiling water and a lower elongated water reservoir between said ends;

electrode means within said housing in said water reservoir and means adapted to extend to ground level to energize said electrode means to heat the water; and

fluid discharge means that includes a pipe diversion port projecting from at least one end of said housing, said port communicating with said upper chamber and aimed toward the casing to allow fluid in said chamber to pass out of said housing and the openings of the casing into the petroleum formation to heat the same and change the viscosity of oil in the formation.

2. A horizontal steam or hot water generator as defined in claim 1 wherein:

an elongated water barrier is positioned in said housing between said ends to divide said elongated upper chamber and said elongated lower water reservoir.

3. A horizontal steam or hot water generator as defined in claim 2 wherein:

said elongated water barrier is a screen that will allow steam to pass therethrough yet restrict the upward movement of water as it is boiling.

4. A horizontal steam or hot water generator as defined in claim 1 wherein:

said electrode means includes t least one pair of electrode disks in spaced apart facing relationship which upon energization will heat water in the vicinity of said pair.

5. A horizontal steam or hot water generator as defined in claim 1 wherein:

said electrode means includes a pair of electrode rods mounted within said reservoir and said rods extend a length greater than one-half the length of said housing.

6. A horizontal steam or hot water generator as defined in claim 1 wherein:

said electrode means includes said housing as one of said electrodes and the second electrodes being a rod mounted within said water reservoir.

7. A horizontal steam or hot water generator as defined in claim 4 wherein there are a plurality of pairs of electrode disks mounted in said housing within said reservoir.

8. A horizontal steam or hot water generator as defined in claim 1 wherein:

there are two pipe diversion ports one projecting from each end of said housing.

9. A horizontal steam or hot water generator as defined in claim 1 wherein:

said fluid discharge means includes a telescoping manifold adapted to project outwardly from one of said ends and communicating with said upper chamber, said manifold adapted to enlarge the area of fluid contact in said petroleum deposit.

10. A horizontal steam or hot water generator as defined in claim 1 wherein:

said water supply fluid discharge means is a manifold positioned within said housing in said water reservoir area.

11. A horizontal steam or hot water generator as defined in claim 1 wherein:

said water supply means is formed within the wall of said housing and includes a number of ports passing through said wall into said housing to allow water to flow into said water reservoir.

12. A horizontal steam or hot water generator as defined in claim 1 wherein:

said water supply means is a pipe mounted on the exterior of said housing at the lower portion thereof and a plurality of ports pass through the wall of said housing whereby the pipe and said water reservoir are in communication.