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| Number | Title | Issue Date |
| 7322410 | Controllable production well packer An apparatus and method for operating an electrically powered device in a packer using the piping structure of the well as an electrical conductor for providing power and/or communications. The electrically powered device may comprise an electrically controllable va... | 01/29/2008 |
| 7259688 | Wireless reservoir production control A reservoir production control system includes a plurality of wells for producing a reservoir linked to a central computer over a downhole communication network and a surface communication network. Both the downhole and the surface communication networks are wireles... | 08/21/2007 |
| 7170424 | Oil well casting electrical power pick-off points A power supply apparatus is provided for supplying power and communications within a first piping structure. An external power transfer device is positioned around the first piping structure and is magnetically coupled to an internal power transfer device. The inter... | 01/30/2007 |
| 7114561 | Wireless communication using well casing A petroleum well having a borehole extending into a formation is provided. A piping structure is positioned within the borehole, and an induction choke is positioned around the piping structure downhole. A communication system is provided along the piping structure ... | 10/03/2006 |
| 7073594 | Wireless downhole well interval inflow and injection control An apparatus and methods of electrically controlling downhole well interval inflow and/or injection. The downhole controllable well section having a communications and control module, a sensor, an electrically controllable valve and an induction choke. The electrica... | 07/11/2006 |
| 7075454 | Power generation using batteries with reconfigurable discharge A petroleum well for producing petroleum products that incorporates a system adapted to provide power to a downhole device in the well. The system includes a current impedance device and a downhole power storage device. The current impedance device is positioned suc... | 07/11/2006 |
| 7055592 | Toroidal choke inductor for wireless communication and control An induction choke in a petroleum well where a voltage potential is developed across the choke to power and communicate with devices and sensors in the well. Preferably, the induction choke is a ferromagnetic material and acts as an impedance to a time-varying curre... | 06/06/2006 |
| 6955225 | Method of and apparatus for securing capillary tubing in a wellhead A body having a bore therethrough for insertion of capillary tubing. A first means slidably coupled into the bore of the body frictionally restrains movement of the tubing by hydraulically engaging the periphery of the tubing with an elastomeric compressible sealing... | 10/18/2005 |
| 5252025 | Drainage pump A drainage pump (10) in which the portion near the entrance of the impeller (12) in the suction tube (11) is open to the set lowest suction water level (L.W.L.) through an air intake pipe (15), so that air is introduced into the portion near the entrance ... | 10/12/1993 |
| 5154570 | Vertical shaft pump A vertical shaft pump to be disposed in a pump pit comprises a pump casing having a suction opening, and an impeller disposed in the pump casing below a position corresponding to the lowest water level in the pump pit below which the pump starts to suck a... | 10/13/1992 |
| 5074746 | Constant speed vertical pump with aeration According to the vertical pump of the present invention, a reverse U-shape air suction passage is connected to a suction casing which communicates with the impeller chamber, and a U-shape branch passage is branched from a hanging portion of the air suctio... | 12/24/1991 |
| 4896511 | Optimally staged cryopump A cryopump which has three temperature stages for pumping gas. The third temperature stage is surrounded by and separated from the second temperature stage which is surrounded by and separated from the first temperature stage. Adsorbent placed on the seco... | 01/30/1990 |
| 4756671 | Low damage hydraulic fish pumping system A submersible rotary impeller fish pump augmented by the release of large volumes of pressurized air into the pump's discharge stream during pump operation enables the pumping of fish or other water-borne articles to the same or greater heights at materia... | 07/12/1988 |
| 4702676 | Liquid driven pump or propulsive apparatus The apparatus relates to a jet pump or apparatus which displaces a main fluid by a pressurized driving liquid. The apparatus has a duct to receive the main fluid, and a driving liquid manifold cooperating with the duct to receive the pressurized driving l... | 10/27/1987 |
| 4689510 | Electric motor and flywheel for operation while immersed in a liquid An electric motor, for instance for a hydraulic elevator, is entirely immersed within a liquid such as oil, and is provided with a flywheel. A drawback of this kind of electric motor is that the flywheel, rotating in oil, brakes the rotation of the motor.... | 08/25/1987 |
| 4671741 | Pipe for elevating liquids through successively arranged accumulating and communicating portions, and device provided therewith A device for elevating liquids in which liquid is raised in a pipe under the action of a pressure difference which is smaller than a pressure difference of a solid liquid column having a height equal to a height of elevation.... | 06/09/1987 |
| 4643650 | Fluid-raising apparatus driven by low hydraulic head A fluid-raising apparatus includes a compression chamber which receives liquid, from an elevated source, such that gas in the chamber is pressurized and used to lift fluid through a vertical conduit. When the chamber fills with liquid, a float lifts a dra... | 02/17/1987 |
| 4613284 | Apparatus for elevating liquids including a Venturi pipe and a liquid delay element A wind pump has a liquid supply pipe connected with a convex pipe through a Venturi pipe open to wind, and a delivery pipe connected with the convex pipe and provided with a pumping-out element for elevating a liquid portion drawn into the convex pipe, an... | 09/23/1986 |
| 4573877 | Apparatus for elevating liquids including a pair of Venturi pipes having wind as motive fluid An arrangement for elevating liquids with the aid of wind has an upper delivery pipe with an upper end connected to a pumping-out device, a lower supply pipe introducable into a water source and having an upper end connected with a constriction of a Ventu... | 03/04/1986 |
| 4558990 | Composite pumping system An article transfer pumping system combining the effects of a jet pump and an air lift pump to minimize article damage while increasing lift capability and overall system efficiency. Air lift pump placement adjacent the pump inlet aerates the rising colum... | 12/17/1985 |
| 4545731 | Method and apparatus for producing a well A system and method for producing earth formation fluids such as crude oil using a lighter oil to force the crude oil to the surface and thereafter removing the lighter oil by gas lift techniques. The well system includes spaced packers defining a product... | 10/08/1985 |
| 4501659 | Skimmer apparatus for swimming pools Skimmer apparatus for swimming pools and the like having a receptacle in which a skimmer basket is fitted. The receptacle provides a chamber into which pool water flows through the skimmer. Water is caused to flow into and through the receptacle by a conn... | 02/26/1985 |
| 4392062 | Fluid dynamic energy producing device A fluid dynamic device is provided which includes a fluid holding and U-shaped conduit having a first leg and a second leg, an electrical generating device positioned between and in flow communication with the first and second legs and being motivated by ... | 07/05/1983 |
| 4373867 | Pressure charged airlift pump A pumping system is described for pumping fluids, such as water with entrained mud and small rocks, out of underground cavities such as drilled wells, which can effectively remove fluids down to a level very close to the bottom of the cavity and which can... | 02/15/1983 |
| 3963377 | Pneumatically powered pump system Disclosed is a pumping system using a pneumatically powered, submerged pump for lifting high viscosity oil from a well. The pump includes a flexible, bag-shaped expansible member or "bladder" mounted within a surrounding housing. Pressurized gas is suppli... | 06/15/1976 |
