Claims
- 1. A jet pump for producing a well comprising a main body having an axial bore formed therethrough; a power fluid inlet connected to said axial bore at one end of said main body, a nozzle axially aligned with said main body and having a jet end spaced from an inlet end, a suction annulus formed concentrically about the jet end of said nozzle and within said main body, said inlet end being connected to said power fluid inlet such that power fluid can flow into said inlet end, through the interior of said nozzle, and out of said jet end;
- means, including a formation fluid inlet connected to the other end of said main body, which forms a flow passageway extending from the last said inlet into said suction annulus;
- a venturi axially aligned with said nozzle and having an inlet end and an outlet end, said inlet end of said venturi being placed adjacent to said jet end of said nozzle, said venturi having sidewalls which describe a frustum of a cone;
- a conical deflector having a large diameter end supported by said main body and a free end extending away therefrom and received within the venturi, with the apex of the deflector being positioned adjacent to the throat; with there being an annular passageway formed between the outer surface of the deflector and the inner surface of the venturi; an annular outlet chamber underlying and in communication with said annular passageway;
- said annular passageway commences in proximity of the nozzle outlet and extends into communication with said annular outlet chamber; the area of said annular passageway increases in a downstream direction, a marginal length of said deflector extends through said annular outlet chamber;
- an outlet port connected to said annular outlet chamber for conducting mixed fluid flow away from the pump and towards the surface of the ground.
- 2. The jet pump of claim 1 wherein said main body terminates in an upper sub, a packer nose assembly connected to said upper sub;
- said power fluid inlet extends through said upper sub and into communication with said nozzle;
- an inlet sub at the lower end of said main body, said annular outlet chamber being formed above said inlet sub; said outlet port being directly connected to said annular outlet chamber so that fluid flows from said annular passageway directly into said annular outlet chamber and then through said outlet port to a location externally of the pump.
- 3. The jet pump of claim 1 wherein said annular outlet chamber is formed about a lower marginal end of said deflector and below said venturi;
- said deflector has a constant diameter marginal lower end which is supported by the lower end of said annular outlet chamber;
- said outlet port directly connects the annular outlet chamber to conduct flow to a location externally of the pump.
- 4. A jet pump comprising; a main body having a power fluid inlet passageway at the upper end thereof, a formation fluid inlet passageway at the lower end thereof, and an outlet passageway through which spent power fluid and produced fluid may flow;
- a nozzle mounted within said main body, said nozzle having an inlet connected to said power fluid inlet passageway;
- an annular suction chamber formed within said main body, means forming a passageway connecting said suction chamber to said formation fluid inlet passageway;
- a venturi mounted within said main body, a throat formed within said venturi, said venturi having an entrance and a diverging discharge opening, said throat being axially aligned with and spaced from said nozzle, said nozzle having an outlet adjacent to said entrance, said annular suction chamber being formed about the nozzle outlet and the venturi entrance;
- a deflector having a fixed end opposed to a reduced free end, means mounting said fixed end to said main body with said reduced free end being received within said venturi in spaced relation thereto, thereby forming an annular passageway therebetween which increases in area in a downstream direction, and means connecting said annular passageway to said outlet passageway;
- said main body terminates in a upper sub; said power fluid inlet passageway extends through said upper sub into communication with said nozzle;
- an outlet sub located at a medial marginal length of said main body, said outlet passageway being formed within said outlet sub, so that fluid can flow from said annular passageway to a location externally of the pump.
- 5. The pump of claim 4 wherein the free marginal end of said deflector reduces in diameter in an upstream direction, an annular discharge chamber is formed about said deflector at a location below said venturi, said outlet passageway is connected to the interior of said annular passageway by means of said annular discharge chamber for conducting mixed fluid flow to a location externally of the pump.
- 6. The pump of claim 4 wherein said upper sub is connected to a packer nose assembly, and power fluid flows through the packer nose assembly into said power fluid inlet;
- so that the pump can be circulated into and out of a borehole as a free type pump apparatus.
REFERENCE TO RELATED PATENT APPLICATION
My previous patent application Ser. No. 803,977 filed June 6, 1977 entitled "DOWNHOLE JET PUMPS" now U.S. Pat. No. 4,183,722, of which this patent application is a continuation-in-part.
US Referenced Citations (6)
Continuation in Parts (1)
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Number |
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803977 |
Jun 1977 |
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