| Patent application number | Description | Published |
|---|
| 20090065202 | GAS SEPARATOR WITHIN ESP SHROUD - A submersible well pump assembly has a gas separator that separates gas prior to entering into the pump. A shroud encloses a portion of the pump assembly, including the gas separator. The gas separator has gas discharge tubes that extend from it out through the shroud. The gas discharge tubes are tangentially aligned to create a vortex on the exterior of the shroud. | 03-12-2009 |
| 20090151953 | SUBMERSIBLE PUMP WITH SURFACTANT INJECTION - A submersible pumping system for use downhole that includes a housing, a pump and gas separator within the housing, a motor for driving the pump and separator, and a foaming agent injection system. The foaming agent injection system injects a foaming agent upstream of the pump and optionally upstream of the separator. The foaming agent injection system comprises a foaming agent supply, an injection pump, and foaming agent injection line. | 06-18-2009 |
| 20090155064 | SYSTEM, METHOD AND APPARATUS FOR TWO-PHASE HOMOGENIZING STAGE FOR CENTRIFUGAL PUMP ASSEMBLY - A two-phase, homogenizing or mixing stage for a centrifugal pump assembly homogenizes the fluids being circulated therethrough. The mixing stage produces high shut-in head pressure and a very high maximum flow rate. The mixing stage has a diffuser with fixed diffuser vanes that extend radially or tangentially at acute angles. The vanes may be curved in both the axial and radial directions to force fluids impinging thereon to have a radially inward component to create turbulence. The turbulence mixes and homogenizes the gas and liquid fluids to improve the overall performance of centrifugal pump assemblies that operate in two-phase fluids. The mixing stage also has an impeller adjacent the diffuser. The impeller vanes likewise extend radially and tangentially therefrom at acute angles and may be curved. | 06-18-2009 |
| 20090291003 | CENTERING COUPLING FOR ELECTRICAL SUBMERSIBLE PUMP SPLINED SHAFTS - An electrical submersible well pump assembly having a pump, a pump motor, and a seal section. The motor drives the pump via shafts rotatingly coupled with a coupling assembly. The coupling assembly maintains the shaft ends in coaxial alignment with an alignment device. The alignment device is profiled on opposite ends for mating engagement with the centering profiles on the shaft ends. | 11-26-2009 |
| 20100096141 | Jet Pump With a Centrifugal Pump - A seafloor pump assembly is installed within a caisson that has an upper end for receiving a flow of fluid containing gas and liquid. The pump assembly is enclosed within a shroud that has an upper end that seals around the pump assembly and a lower end that is below the motor and is open. An extraction tube has an upper end above the shroud within the upper portion of the caisson and a lower end connected to a jet pump. The extraction tube causes gas that separates from the liquid and collects in the upper portion of the caisson to be drawn into the jet pump and mixed with the liquid as the liquid is being pumped. | 04-22-2010 |
| 20100108307 | SYSTEM, METHOD AND APPARATUS FOR GAS EXTRACTION DEVICE FOR DOWN HOLE OILFIELD APPLICATIONS - A gas extraction device for down hole oilfield applications utilizes the flow of the liquid, created by an artificial lift device, to produce conditions by which the gas is drawn into tubing. A venturi creates a low pressure area through a constricted section of the tubing. The pressure within the throat of the venturi drops the pressure in the casing. The device is axially adjusted to allow communication ports to a lower pressure area of the casing annulus. The lower pressure in the venturi draws the gas into the liquid stream and into the production tubing above the device. The gas is then transferred through the well head within the liquid stream. | 05-06-2010 |
| 20100300695 | PLUG IN PUMP FOR INVERTED SHROUD ASSEMBLY - The pump can be utilized in gassy oil wells to prevent gas slugs from locking the electrical submersible pump. A shroud assembly is provided with a bottom that can be fixed to the top of a seal section connected to the top of a motor. Additional lengths of shroud can be added as the shroud assembly is lowered into the well. The electrical submersible pump can then lowered into the shroud and supported from a production tubing string. A hanger can then be attached to the production tubing string to carry the weight of the shroud assembly, motor, and seal section. | 12-02-2010 |
| 20100303537 | Spline Stress Distribution - A connection between a shaft and a coupling that preferably involves involute shaped splines is designed to reduce stress from torque applied to the shaft by a drive motor. To avoid stress concentration at the mouth of the coupling on startup, the shaft splines are made to taper from the shaft end down to the spline end. As a result, the initial contact with the coupling splines occurs within the coupling and removed from it mouth. The shaft is allowed to elastically twist in response to the applied torque as the contact area increases with shaft twisting and the contact line moves toward the mouth of the coupling. Stress concentration that formerly occurred at the coupling mouth is alleviated as some shaft elastic twist occurs without adding stress to the shaft splines until coupling contact is made. | 12-02-2010 |
| 20110024123 | ESP FOR PERFORATED SUMPS IN HORIZONTAL WELL APPLICATIONS - The present invention relates to a process for cooling an electrical submersible pump. More specifically, the invention relates to blocking a portion of wellbore fluid from entering a sump, thereby causing the pump to draw fluid from below the pump motor past the exterior of the pump motor toward a pump inlet. | 02-03-2011 |
| 20110024124 | Caisson Two-Phase Emulsion Reducer - A seafloor pump assembly is installed within a caisson that has an upper end for receiving a flow of fluid containing gas and liquid. The pump assembly is enclosed within a shroud that has an upper end that seals around the pump assembly and a lower end that is below the motor and is open. A separating device is connected to an upper end portion of the discharge pipe within the caisson. The separating device causes separation of gas from the flow containing gas and liquid to be enhanced prior to the flow reaching the operating liquid level in the caisson. | 02-03-2011 |
