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Jet pumpRelated Patent Categories: Pumps, One Fluid Pumped By Contact Or Entrainment With Another, JetJet pump description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20070020114, Jet pump. Brief Patent Description - Full Patent Description - Patent Application Claims
FIELD OF THE INVENTION [0001] The present invention relates to jet pumps. BACKGROUND [0002] Jet pumps in general include a power fluid conduit and a produced fluid return line connected from the surface to the pump. Pressurized power fluid is forced by a pump at the surface down through the jet pump drawing a production fluid into the pump and intermixing with the power fluid. The intermixed power and production fluid are then returned to the surface through the return line. In a common installation, the jet pump is run into a wellbore on a tubing for de-watering hydrocarbon bearing wells and/or producing hydrocarbons. [0003] Typically these prior art jet pumps draw the production fluid through a standing valve positioned at the base of the pump. These bottom draw jet pumps often fail due to sludge or particulate in the fluid. Additionally, many of these prior art jet pumps include torturous production and mixed fluid paths and multiple valve assemblies increasing points of failures and increasing the cost of constructing and repairing the pumps. Further, many of these prior art pumps are difficult to start up as the flow of motive fluid is stabilized drawing production fluid into the pump. [0004] Therefore, it is a desire to provide an improved jet pump that addresses shortcomings of prior art jet pumps. It is a still further desire to provide a jet pump having radial production inlet ports. SUMMARY OF THE INVENTION [0005] Accordingly, a jet pump is provided. The jet pump including a housing having a central longitudinal bore and at least one longitudinal return bore, the central bore is in fluid communication with the return bore. A nozzle is disposed in the central bore in fluid communication with a mixing section. A chamber is formed within the central bore proximate the nozzle and the mixing section. A production inlet port is formed radially through the housing between the chamber and the exterior of the housing. The top of the housing is adapted for connecting a conduit for providing the motive or power fluid to the central bore and the carried nozzle and for returning the mixed motive and production fluid from the return bore to the surface. The central bore and the return bores are in fluid connection proximate the bottom of the housing. The fluid connection may be provided by a bull plug further closing the bottom end of the housing from fluid communication with the exterior of the housing. [0006] It may further be desired for the jet pump to include a check valve mechanism positioned in the production inlet ports. The check valve mechanism allowing fluid flow through the port from the exterior of the housing into the central bore and substantially blocking flow through the port directed from the central bore to the exterior of the housing. [0007] The foregoing has outlined the features and technical advantages of the present invention in order that the detailed description of the invention that follows may be better understood. Additional features and advantages of the invention will be described hereinafter which form the subject of the claims of the invention. BRIEF DESCRIPTION OF THE DRAWINGS [0008] The foregoing and other features and aspects of the present invention will be best understood with reference to the following detailed description of a specific embodiment of the invention, when read in conjunction with the accompanying drawings, wherein: [0009] FIG. 1 is a cross-sectional view of an embodiment of a jet pump assembly of the present invention, [0010] FIG. 2 is a cross sectional view of the housing along the line 2-2 of FIG. 1; and [0011] FIG. 3 is a cross-sectional side view of an embodiment of a housing of the present invention. DETAILED DESCRIPTION [0012] Refer now to the drawings wherein depicted elements are not necessarily shown to scale and wherein like or similar elements are designated by the same reference numeral through the several views. [0013] As used herein, the terms "up" and "down"; "upper" and "lower", and other like terms indicating relative positions to a given point or element are utilized to more clearly describe some elements of the embodiments of the invention. Commonly, these terms relate to a reference point as the surface from which drilling operations are initiated as being the top point and the total depth of the well being the lowest point. [0014] FIG. 1 is a cross-sectional view of a jet pump assembly of the present invention generally denoted by the numeral 10. Jet pump assembly 10 includes a housing 12 having a central bore 14 and a plurality of mixed fluid return bores 16 formed substantially parallel to the longitudinal axis of housing 12. Housing 10 may be constructed of any material suitable for the fluids produced and well conditions. For example, the housing may be constructed of steel, stainless steel, polypropylene, polyvinyl chloride, acrylic, or polytetrafluorethylene. [0015] Housing 12 further includes at least one production inlet port 18 in fluid communication between central bore 14 and the exterior of housing 12. Production inlet port 18 is formed radially through housing 12 and is not located at the bottom of housing 12. [0016] Housing 10 includes a first end 20 adapted for connecting to a motive fluid conduit 11 and a mixed fluid return line conduit 13, such as a string of tubing. The second end 22 of housing 22 is adapted for carrying a bull plug 24 for creating fluid communication between return bores 16 and central bore 14. [0017] Jet pump 10 further includes a nozzle assembly 26 and a mixing tube assembly 28 disposed within central bore 14 of housing 12. Nozzle assembly 26 includes a power fluid channel 30 connected to a nozzle 32. Nozzle assembly 26 may be pumped to the surface for repair or replacement by reversing fluid flow through pump 10. [0018] Mixing tube assembly 28 includes a mixing section 34 and a mixed fluid conduit 36. Mixing tube assembly 28 is disposed in central bore 14 with mixing section 34 position below and in fluid communication with nozzle 32. [0019] A vacuum chamber 38 is formed within central bore 14 proximate nozzle 32 and mixing section 34. Production inlet ports 18 are formed radially through housing 12 proximate chamber 38. Fluid communication between chamber 38 and the exterior of housing 12 is provided through ports 18. As power or motive fluid 40 is discharged from nozzle 32 into mixing section 34, a low pressure or vacuum is created in chamber 38. Formation or production fluid 42 is drawn through production inlet ports 18 into mixing section 34 and mixes with motive fluid 40 to form a mixed fluid stream 44. Continue reading about Jet pump... Full patent description for Jet pump Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Jet pump patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Jet pump or other areas of interest. ### Previous Patent Application: Pressure sensor Next Patent Application: Integrated pump apparatus for semiconductor processing Industry Class: Pumps ### FreshPatents.com Support Thank you for viewing the Jet pump patent info. 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