The gas lift accelerator is a method and a downhole apparatus based on the principle of the jet pump to allow the extraction of reservoir fluids up to high API grade with low or no reservoir pressure, at any depth, by injecting available gas in the oil field, allowing the flexibility of operation on diverse well completion configurations like sliding sleeve type and gas lift mandrels, complementing the operating when other methods like traditional gas lift procedures or hydraulic fluid jet pumps are not effective. The gas lift method includes the use of downhole and surface metering data to optimize the operation of the gas lift accelerator apparatus.

Devices for producing vacuum using the Venturi effect have a housing defining a suction chamber, a motive passageway converging toward the suction chamber, a discharge passageway diverging away from the suction chamber, and a suction passageway in fluid communication with the suction chamber. A solenoid valve is positioned in the suction passageway and has an elongate sealing member received inside a coil, a first seal seat at a first end of the coil, and a second seal seat at the second end of the coil. The elongate sealing member is translatable within the coil between the first seal seat and the second seal seat, which define an open position and a closed position. Within the suction chamber, a motive exit of the motive passageway is generally aligned with and spaced apart from a discharge entrance of the discharge passageway to define a Venturi gap.

A hydraulically-retrievable, reversible flow operation jet pump threadably attached to a tubing string which is powered by fluid supplied through the tubing string. A pump housing, or container, of the jet pump includes a hollow cylinder with an internal diameter closely matching that of the attached tubing string. A jet pump assembly is retainably, scalably disposed within the pump housing. A jet pump reducing nozzle-mixing chamber-diffuser assembly is retainably disposed within the carrier. Power fluid pumped through the nozzle-mixing chamber-diffuser assembly conventionally draws in objective fluid in which the jet pump is immersed, and transports it out of the pump to the desired receiving station. The jet pump assembly can be oriented in either of two directions within the pump housing, for selected fluid direction flow.

An aspirator for creating vacuum is disclosed that includes a housing defining a fluid passageway with a first tapering portion and a second tapering portion. Each tapering portion has a larger internal opening and a smaller internal opening, the smaller openings facing one another. The aspirator includes a gate positioned between and in fluid communication with the first and second tapering portions, the gate having a first Venturi tube with a Venturi opening creating vacuum when fluid flows in a direction and a second Venturi tube with a Venturi opening that creates vacuum when fluid flows in the opposite direction. The Venturi openings are in fluid communication with a suction port, and the first and second Venturi tubes may provide different mass flow rates through the aspirator. An engine system having an aspirator with a gate having a first bore and a second bore and an actuator is also disclosed.

A suction jet pump has a fuel line, a propulsion jet nozzle, an intake region, a mixing tube, and a diffuser. The propulsion jet nozzle and the mixing tube are oriented rectilinearly with respect to one another. As viewed in the direction of flow, the diffuser has a course which differs from the course of the mixing tube.

A jet pump is manufactured using additive and subtractive techniques. A tubular body and a diffuser formed therein form a monolithic structure. The tapered diffuser is continuously curved from a throat end to a discharge end. A cross-sectional area at the discharge end is optimized without compromising a cross-sectional area of a production conduit defined in an annular space between the body and the diffuser. The body can be shaped to include radially extending localized or circumferential protrusions to maximize fluid conduits within the pump. A one-way valve is formed within the production conduit using the additive and subtractive techniques and is integrated in the monolithic structure.

A jet pump assembly is adapted to be releasably attached to a tubular member of a tubular string in an oil well. The jet pump may be pumped out of the tubular string to the surface by a reverse flow of power fluid down the well between the tubular string and the casing of the well. Consequently the jet pump may be serviced or reconfigured to a direct pumping mode without the necessity of a wire line or other apparatus. A sensor for measuring downhole parameters such as temperature and pressure etc. is positioned within a cavity located in a lower portion of the jet pump so as to be removable from the well with the pump.

An apparatus can include a jet pump with a nozzle and a throat, a flow passage for conducting production fluid to the throat, and a check valve that prevents flow from the throat to the flow passage and permits flow from the flow passage to the throat. A method can include performing a bottomhole well pressure test while measuring well pressure with a well parameter sensor connected to a jet pump, and then retrieving the well parameter sensor and the jet pump together from the well. A system can include a jet pump sealingly received in a tubular string, the jet pump including a throat that receives a power fluid from a nozzle and receives a production fluid from a flow passage, and a check valve permitting flow of the production fluid from the flow passage to the throat and preventing flow of the power fluid to the flow passage.

The present invention relates to an ejector assembly and a vacuum pump, the ejector assembly including a typical cylindrical vacuum ejector and a support part. The support part includes a first support having a supply line extending outwards from a hole in which a first end of the ejector is mounted, and a second support having a discharge line extending outwards from a hole in which a second end of the ejector is mounted. Further, the first and second supports facing each other are configured such that the outer circumferential surfaces thereof are in contact with the inner circumferential surface of a pipe member so as to form a space between the first and second supports, the space communicating with through holes. In the vacuum pump using the ejector assembly, the pipe member is a housing, and the space is a vacuum chamber formed in the housing.

An ejector (38) has ports (40, 42, 44) for receiving a motive flow and a suction flow and discharging a combined flow. The ejector has a motive flow inlet, a suction flow inlet (42), and an outlet (44). A suction flow flowpath extends from the suction flow inlet. A motive flow flowpath extends from the motive flow inlet to join the suction flow flowpath and form a combined flowpath exiting the outlet. The ejector comprises a plurality of motive flow nozzles (100, 302, 402, 602, 702, 802) along the motive flow flowpath. The motive flow nozzles are oriented to impart a tangential velocity component to the motive flow. A plurality of diffusers (130, 304, 404, 604, 704, 804) are along the combined flowpath and are oriented to recover the tangential velocity from the combined flow.