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| Number | Title | Issue Date |
| 7367366 | Pumping device A pumping device includes a container having a cover structure. A piston is movably received in the container and is manually operable. The cover structure has an air inlet valve and a slide switch, which, when properly set, allow air to be sucked into or expelled o... | 05/06/2008 |
| 7207395 | Method and system for testing a partially formed hydrocarbon well for evaluation and well planning refinement A method and system for testing a partially formed well includes forming a first well bore intersecting a subterranean formation. The first well bore includes a portion of a planned well having a first configuration. A production characteristic of the subterranean f... | 04/24/2007 |
| 7207390 | Method and system for lining multilateral wells In accordance with one embodiment of the present invention, a method for lining a lateral wellbore includes drilling a main wellbore extending from a surface to a subterranean zone, casing the main wellbore with a main casing having a plurality of lateral wellbore w... | 04/24/2007 |
| 7163063 | Method and system for extraction of resources from a subterranean well bore A method for stimulating production of resources from a coal seam includes forming a drainage well bore in the coal bed that has a first end coupled to a ground surface and a second end in the coal seam. The method further includes inserting a liner into the well bo... | 01/16/2007 |
| 7118361 | Rotary pistons A rotary piston for use in pumps or motors, the piston having a radially movable vanes seated within the pumps rotor. The vanes are biased outwardly and forced inwardly by a cam action of the interior wall of the housing of the piston. Operation of the piston may be... | 10/10/2006 |
| 7100687 | Multi-purpose well bores and method for accessing a subterranean zone from the surface A well system includes at least two well bores extending from a surface to a subterranean zone. Each of the two well bores is used to form a well bore pattern for the subterranean zone that intersects the other well bore and transports fluid from the subterranean zo... | 09/05/2006 |
| 6976533 | Method and system for accessing subterranean deposits from the surface Improved An improved method and system for accessing subterranean deposits from the surface that substantially eliminates or reduces the disadvantages and problems associated with previous systems and methods. In particular, the present invention provides an articul... | 12/20/2005 |
| 6964298 | Method and system for accessing subterranean deposits from the surface An improved method and system for accessing subterranean deposits from the surface substantially eliminates or reduces the disadvantages and problems associated with previous systems and methods. In particular, the present invention provides an articulated well with... | 11/15/2005 |
| 6945755 | Fluid controlled pumping system and method A fluid level controlled pumping system includes a pumping unit disposed within a fluid cavity. The pumping unit includes an inlet operable to receive a fluid to be pumped from the fluid cavity. The system also includes a valve slidably coupled to the pumping unit. ... | 09/20/2005 |
| 6942030 | Three-dimensional well system for accessing subterranean zones A method for accessing a plurality of subterranean zones from the surface includes forming an entry well from the surface and forming two or more exterior drainage wells from the entry well through the subterranean zones. The exterior drainage wells each extend outw... | 09/13/2005 |
| 6652241 | Method and compressor module for compressing a gas stream The invention relates to a method and compressor module for compressing a gas stream of entry temperature t1 with the aid of hydraulically driven piston compressors in two compression stages of an entry pressure p1 from an intermedia... | 11/25/2003 |
| 6604910 | Fluid controlled pumping system and method A fluid controlled pumping system includes a pumping unit disposed within a fluid cavity. The pumping unit includes a passage extending to a suction end of the pumping unit. The system also includes a pressure source coupled to the passage and operable to... | 08/12/2003 |
| 6497556 | Fluid level control for a downhole well pumping system A fluid level controlled pumping system includes a pumping unit disposed within a fluid cavity. The pumping unit includes an inlet operable to receive a fluid to be pumped from the fluid cavity. The system also includes a valve slidably coupled to the pum... | 12/24/2002 |
| 5711655 | Pump system using a vacuum chamber and mechanical pump combinations A pump arrangement having a mechanical pump in series with a vacuum compartment on an inlet side of the mechanical pump. The vacuum compartment has a suction line flow connected to the supply of liquid to be pumped and draws that liquid by vacuum to the i... | 01/27/1998 |
| 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 |
| 4704071 | Method and apparatus for pumping liquids An apparatus and method for raising liquids from one level to a higher level by means of a centrifugal pump operating in air for minimum drag, is described. A sealed tank is half filled with liquid and the remaining space is subjected to an externally app... | 11/03/1987 |
| 4666347 | Hydraulic conveying of solids Solids particles are conveyed hydraulically by first mixing the solids particles with a liquid in order to form a viscous material of substantially uniform consistency. This viscous material is then introduced or injected into a flowing hydraulic medium t... | 05/19/1987 |
| 4605356 | Apparatus for continuously pressure-feeding slurry Slurry consisting of water and solid material is fed to a plurality of supply chambers arranged in parallel to each other by a low pressure slurry pump, and the filled slurry is transferred to a transferring pipe under liquid pressure of a high pressure d... | 08/12/1986 |
| 4599048 | Industrial suction apparatus Suction apparatus, particularly designed for handling liquid and semi-liquid materials in an industrial context, comprises a suction tank provided with simultaneously operable exhauster and discharge pumps each driven by a common compressed air source. Th... | 07/08/1986 |
| 4597719 | Suck-back pump A suck-back pump for preventing any additional amount of liquid from dropping out of the tip of a delivery pipe, after a predetermined amount of liquid has been delivered from the delivery pipe. The suck-back pump includes inlet and outlet ports for liqui... | 07/01/1986 |
| 4316703 | Gas compressor The specification discloses a gas compressor incorporating a rotating wheel with cavities therein, the cavities transferring gas into a chamber of elevated pressure while simultaneously using the cavities to transfer a liquid out of that chamber.... | 02/23/1982 |
| 4071058 | Pumping unit for television tubes A two stage pumping unit for evacuating tubes, and in particular television ubes. A primary mechanical pump is air-cooled and is connected in series with an oil diffusion pump. The inlet for the stem of a tube to be evacuated has a sealing ring and between... | 01/31/1978 |
