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| Number | Title | Issue Date |
| 8056620 | Low cost rigless intervention and production system A system which may be used to replace workover rigs and metallic pipes for the production of hydrocarbon from wellbores uses a non-metallic, substantially continuous, flexible tube comprising a flexible, non-metallic, e.g. resin-based, substantially continuous produ... | 11/15/2011 |
| 7984756 | Overpressure protection in gas well dewatering systems Configurations for gas well dewatering systems having overpressure protection to protect a pump and its peripheral equipment from damage due to overpressure are provided. ... | 07/26/2011 |
| 7954545 | Plunger lift system for well A plunger lift system has a bumper and a landing positioned in tubing below a safety valve of a well. A plunger moving between the bumper and landing lifts columns of liquid above the plunger when pushed by downhole pressure. A valve on the plunger's housing is mova... | 06/07/2011 |
| 7909090 | System, method and apparatus for scale resistant radial bearing for downhole rotating tool components and assemblies Radial bearing designs for electrical submersible pump components and assemblies reduces scale build up on the bearing components. Scale resistant and abrasive resistant sleeves and bushings may be used. The axial lengths of the sleeves are kept within the axial len... | 03/22/2011 |
| 7909089 | Downhole jet pump One embodiment of a downhole jet pump 10 includes an exterior pump housing 12, power fluid jet nozzle 30, mixing tube 32, and a carrier 40 including a plurality of venturi ports 38. A nose piece 48 is provided fluidly... | 03/22/2011 |
| 7806174 | Well jet device A jet pump mounted on a pipe string and a packer, and a through channel with a sealing unit having a logging cable channel is in the pump body. A check valve is in a channel, for supplying a medium pumped out from a well, at the input thereof in the lower body. A gu... | 10/05/2010 |
| 7770634 | Gas lift apparatus for flushing and snubbing well A gas lift production apparatus is provided for use in flushing and snubbing well operation. The apparatus comprises upper production string and lower production string. The upper production string includes at least one side pocket mandrel carrying a gas lift valve,... | 08/10/2010 |
| 7730938 | Continuous sucker rod and method of using same A continuous sucker rod preferably comprising fiberglass or composite material for use in an well is described herein. The continuous sucker rod may be connected at one end to a pump drive, via a polished rod, and at a second end to a downhole pump, via sinker bars ... | 06/08/2010 |
| 7523783 | Internal shock absorber plunger A plunger mechanism has an internal shock absorber apparatus that operates to absorb shock during plunger fall and rise, thereby promoting a more reliable plunger lift system. The present apparatus can be used in well applications with or without a bumper spring. Wi... | 04/28/2009 |
| 7448442 | Pad type plunger A plunger lift for a hydrocarbon well includes a piston that is dropped into the well and then moved upwardly to lift liquid to the surface from adjacent a hydrocarbon formation. The piston includes a series of pads biased outwardly into engagement with an inside wa... | 11/11/2008 |
| 7438125 | Variable orifice bypass plunger A plunger mechanism comprises an adjustable bypass valve. Depending on well parameters, a user may desire to adjust the descent rate of a plunger in service. The present device allows the user to vary or adjust the bypass orifice to alter the flow of liquid through ... | 10/21/2008 |
| 7409997 | Electric submersible pump with specialized geometry for pumping viscous crude oil A centrifugal pump has impellers for pumping low flow, high viscous materials. The impellers have high exit angles greater than 30 degrees and preferably greater than 50 degrees. The impellers and diffusers have specific geometry that varies with viscosity. The pump... | 08/12/2008 |
| 7398830 | Electric-hydraulic power unit The present invention is directed to an electric-hydraulic power unit. In one illustrative embodiment, the power unit comprises a body having a movable pressure barrier positioned therein, the movable pressure barrier defining first and second chambers therein, a co... | 07/15/2008 |
| 7395865 | Gas lift plunger arrangement A plunger in a plunger lift system in an oil and gas well includes shaped grooves spaced along the plunger body, angled fins or below the grooves, an elongated interior cavity open at the bottom, and passages connecting the interior cavity to the grooves. The shape,... | 07/08/2008 |
| 7383878 | Multi-part plunger An improved plunger mechanism apparatus to increase well flow production levels. Efficiency of well flow is increased by a two-piece plunger assembly apparatus that is mechanically latched during lift, separates at the well top, and allows a bottom assembly to effic... | 06/10/2008 |
| 7372516 | Liquid crystal display with a perfume dispenser A liquid crystal display (LCD) with a perfume dispenser is disclosed to include a casing, which has an internal chamber, a front opening, and at least one through hole, a liquid crystal display mounted inside the internal chamber of the casing with the display scree... | 05/13/2008 |
| 7363877 | Method of emptying a container, and use of the method A method of emptying a large container of e.g. 12000 litres for the storage of fish, such as shellfish, e.g. shrimps, said container being emptied through a pipe in the container, air being supplied simultaneously with the emptying. The air is expediently supplied t... | 04/29/2008 |
| 7357186 | Recirculation gas separator A submersible pumping system includes a pump, a motor that drives the pump and a separator assembly. The separator assembly is for separating gas from the fluid and includes an intake and a vent above the intake. Fluid enters the separator assembly at the intake and... | 04/15/2008 |
| 7347273 | Bottom hold completion system for an intermittent plunger A bottom hole assembly for an intermittent lift plunger system includes a retrievable downhole anchor which may be set and reset in one downhole trip, a retrievable packing device, and a plunger stop. ... | 03/25/2008 |
| 7347945 | Method and an installation for separating out multiphase effluents The invention relates to a method and to an installation for separating out an effluent made up of a multi-phase fluid mixture. According to the invention, said installation includes gravity separator means whose geometrical separation characteristics can be adjuste... | 03/25/2008 |
| 7337854 | Gas-pressurized lubricator and method Embodiments of the present invention provide methods and apparatus for reducing kinetic energy of a plunger within a plunger lift system. In one aspect, a lubricator is provided at a surface of a wellbore, the lubricator having a sealed, pressurized chamber therein ... | 03/04/2008 |
| 7331397 | Gas drive fluid lifting system A passive collection and pneumatic lifting system located in a well comprising a pneumatic tube, a fluid tube mounted within the pneumatic tube creating an annulus and a jet barrel chamber formed between the pneumatic tube and fluid tube in fluid communication at th... | 02/19/2008 |
| 7328748 | Thermal actuated plunger A downhole plunger for a gas/oil well comprises a valve to regulate fluid flow past the plunger and a thermal actuator to control the valve. The thermal actuator of the disclosed device enables the valve to open and close aperatures without relying on the physical i... | 02/12/2008 |
| 7328749 | Method and apparatus for accumulating liquid and initiating upward movement when pumping a well with a sealed fluid displacement device Liquid is accumulated above fluid displacement device which is moveable and sealed within a production chamber defined by a production tubing, and upward movement of the fluid displacement device is initiated to pump liquid and gas from a well, by different magnitud... | 02/12/2008 |
| 7318476 | Automatic chemical treatment system with integral flush fluid dispenser A wellbore chemical treating system includes a pressure vessel for containing a treating chemical. The pressure vessel is closed to atmospheric pressure. A first controllably operated valve is disposed in direct fluid communication between an outlet of the pressure ... | 01/15/2008 |
| 7316270 | Oil pumping unit using an electrical submersible pump driven by a circular linear synchronous three-phase motor with rare earth permanent magnet An oil pumping unit is disclosed to include a motor, which has a mover that moves alternately up and down when the motor is electrically connected, and a pump, which has a barrel, an oil suction pipe mounted in the barrel, an inner sleeve, which is connected to the ... | 01/08/2008 |
| 7314086 | Well operations system A wellhead has, instead of a conventional Christmas tree, a spool tree in which a tubing hanger is landed at a predetermined angular orientation. As the tubing string can be pulled without disturbing the tree, many advantages follow, including access to the producti... | 01/01/2008 |
| 7314080 | Slidable sleeve plunger An improved plunger lift mechanism comprises an internal hollow body having bypass orifices that, when exposed, allow fluid to pass through during plunger descent in a downhole tube to the bottom of a production well. A slidable sleeve slides along the hollow body t... | 01/01/2008 |
| 7311152 | Gas operated pump for hydrocarbon wells The present invention generally relates to an apparatus and method for improving production from a wellbore. In one aspect, a downhole pump for use in a wellbore is provided. The downhole pump includes two or more chambers for the accumulation of formation fluids an... | 12/25/2007 |
| 7290602 | Internal shock absorber bypass plunger A bypass plunger having one or more internal shock absorbing elements and a variety of bypass orifice options is disclosed. ... | 11/06/2007 |
| 7290608 | Method and system for pumping in an oil well An effluent pumping method and system include a pump having a rotor and a stator, the rotor being fastened by a first end to a tubular driving string; a device for driving the string into rotation; and a riser having at least one orifice. The riser is fastened to th... | 11/06/2007 |
| 7287595 | Electric-hydraulic power unit The present invention is directed to an electric-hydraulic power unit. In one illustrative embodiment, the power unit comprises a body having a movable pressure barrier positioned therein, the movable pressure barrier defining first and second chambers therein, a co... | 10/30/2007 |
| 7287597 | Device for improving oil and gas recovery in wells A device for improving recovery of hydrocarbons through a well is provided. The device creates, regulates and maintains a calculated bottomhole pressure at a desired level and creating above the device a two-phase gas-liquid homogenous flow for efficient lifting of ... | 10/30/2007 |
| 7278476 | Retrievable stress and torque reducing tool A stress and torque reducing tool has a plunger that reciprocates inside of a body. The tool is connected between the pump and the sucker rod string and reduces stress transmitted therebetween. The body has upper and lower fluid ports to allow the ingress and egress... | 10/09/2007 |
| 7275592 | Oil well pump apparatus An oil well pumping apparatus for pumping oil from a well to a wellhead provides a tool body that is sized and shaped to be lowered into the production tubing string of the oil well. A working fluid is provided that can be pumped into the production tubing. A prime ... | 10/02/2007 |
| 7270186 | Downhole well pump The pump and pump system of the present invention is designed to remove liquids, gas, sand and coal fines from gas and/or oil well bores. There is a need in the oil and gas industry to develop a more efficient operating pump that is capable of operating in wells tha... | 09/18/2007 |
| 7255133 | Fluid pressure system including free floating bladder A fluid pressure system (S) includes a flexible diaphragm bladder (172) located inside a pressure tank (164) installed within a fluid system such as well (168). In preferred aspects, the bladder (172) can be inflated by the introduction o... | 08/14/2007 |
| 7252148 | Plunger actuated pumping system Methods and apparatus for pumping fluids from a well utilizing a submersible pumping system. In one embodiment, the pump comprises a pump body operable to be disposed within tubing within a well. The pump body encloses a pump chamber having an inlet and an outlet. T... | 08/07/2007 |
| 7249613 | Energy attenuation device An energy attenuation device for a conduit that is adapted to convey a pressurized fluid therethrough, comprising a hose section disposed about a portion of the conduit, wherein such conduit portion is provided with at least one aperture, for example in a surface th... | 07/31/2007 |
| 7243730 | Well production optimizing system A well optimizing system and method for lifting fluid that accumulates and retards production in a well. The system includes a plunger having a piston and a detachable plugh. The piston has a sealing section and a retrieval end and defines a passage through the leng... | 07/17/2007 |
