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| Number | Title | Issue Date |
| 8347954 | Plunger lift system with seal and ball detent arrangement An intermittent lift plunger includes at least one seal mandrel, a bottom sub and an upper valve assembly. The valve assembly is closed by a well bottom stop which inserts into the lift plunger and opened by a lubricator stop at the top of the well. The seal mandrel... | 01/08/2013 |
| 8347955 | Plunger lift mechanism Method and apparatus for a plunger lift mechanism with a main channel disposed between a first and second valve. The first valve is closed by engaging a sealing member to a first seat at a proximal end of the main channel and the second valve consequently closes to ... | 01/08/2013 |
| 8342238 | Coaxial electric submersible pump flow meter A venturi structure is supported below an ESP preferably off its gauge assembly below its motor so that the surrounding casing or wellbore defines the venturi path leading to the suction connection of the ESP. Multiple pressure sensing locations are provided in case... | 01/01/2013 |
| 8235107 | Hydraulic oil well pumping apparatus A hydraulic oil well pumping arrangement employs a compensating type hydraulic pump, a directional valving arrangement and a proportioning valving arrangement. When the directional valve is energized, oil is directed to the rod end of the hydraulic cylinder. The rod... | 08/07/2012 |
| 8210253 | Oil well pump A pump system for use in with a downhole pipe string has a pump comprising at least one cylinder with at least one piston inside the cylinder, the movement of the piston causing fluid to be drawn into the pump through a pump inlet before being pushed out through a p... | 07/03/2012 |
| 8136586 | Safety clamp for walking beam compressor Various methods and devices are provided for securing a walking beam compressor to a walking beam. In general, the walking beam compressor is a gas compressor unit that can be disposed around a piston rod extending from a walking beam of an oil well. The piston rod ... | 03/20/2012 |
| 8104534 | Mechanical seal and lock for tubing conveyed pump system A through tubing conveyed electrical submersible pumping system for use in a wellbore. The system includes a tubing string with an attached deployed drive system having a pump motor and a pump engaging receptacle, a pumping assembly insertable into the tubing deploy... | 01/31/2012 |
| 8087457 | Method for a short-term well operation by means of an electrically-powered submersible pumping unit (Kuzmichev method) A method of short-term well operation using a submersible impeller pump unit is disclosed, the method includes the steps of alternating pumping a liquid out of a well and accumulating a liquid in the well, and adjusting an average integral-in-time capacity of the un... | 01/03/2012 |
| 8069914 | Hydraulic actuated pump system The invention is directed to a hydraulic actuated pump system which lifts production fluids and re-circulating hydraulic fluid from a petroleum well. Additives may be added to the hydraulic fluid to apply direct chemical treatment to the production formation. A soni... | 12/06/2011 |
| 8002029 | Apparatus and method for raising a fluid in a well An apparatus, and a method which uses the apparatus, for raising a fluid from a lower region to a higher region of an at least partially cased well. The apparatus includes: a tubing string; a contacting structure at the upper end of the tubing string for engaging a ... | 08/23/2011 |
| 7997335 | 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 belo... | 08/16/2011 |
| 7934547 | Apparatus and methods to control fluid flow in a downhole tool Apparatus and methods to control fluid flow in a downhole tool are disclosed. A disclosed example system includes a hydraulically actuatable device having a cavity for receiving pressurized hydraulic fluid stored by a reservoir, a first and a second hydraulic pump, ... | 05/03/2011 |
| 7841395 | Electric submersible pump (ESP) with recirculation capability A submersible pumping system for use downhole, wherein the system includes a first pump, a second pump, a recirculation coupling between the first and second pumps, and a recirculation line for directing cooling flow across the pump motor. The pumps and coupling are... | 11/30/2010 |
| 7810557 | Collet adapter for a motor shroud An electrical submersible pump assembly (ESP) includes a pump section, a motor section, and a seal section. In one embodiment, an exterior of the pump section defines a gripping indentation above the pump intake. Alternatively, a clamp member may be provided that su... | 10/12/2010 |
| 7770636 | Groundwater collecting apparatus A groundwater collecting apparatus which can continuously collect groundwater, and can selectively collect groundwater at a specific depth by directly generating vertical movement is provided. The groundwater collecting apparatus includes: a vibration unit selective... | 08/10/2010 |
| 7762321 | Hydraulic oil well pumping apparatus A hydraulic oil well pumping arrangement employs a compensating type hydraulic pump, a directional valving arrangement and a proportioning valving arrangement. When the directional valve is energized, oil is directed to the rod end of the hydraulic cylinder. The rod... | 07/27/2010 |
| 7730939 | Safety clamp for walking beam compressor Various methods and devices are provided for securing a walking beam compressor to a walking beam. In general, the walking beam compressor is a gas compressor unit that can be disposed around a piston rod extending from a walking beam of an oil well. The piston rod ... | 06/08/2010 |
| 7669652 | Subsea pumping system A pumping system is disclosed for producing hydrocarbons from a subsea production well with at least one electrical submersible pumping (ESP) hydraulically connected to at least one multiphase pump to boost production fluid flow. ... | 03/02/2010 |
| 7669651 | Apparatus and method for maximizing production of petroleum wells The level of petroleum accumulating from a production zone as it is pumped from a lower elevation in a wellbore is remotely monitored by using the energy of a sucker rod driven pump. One or more sensors are interposed between sections of the sucker rod between the p... | 03/02/2010 |
| 7654315 | Apparatus, pumping system incorporating same, and methods of protecting pump components Apparatus and pumping systems including the apparatus are described, the apparatus including a protector body comprising a material allowing expansion and contraction of an internal fluid, the body serving as a barrier between fluids external of the body and the int... | 02/02/2010 |
| 7624795 | Bottom mount auxiliary pumping system seal section Disclosed is a submersible pumping system that includes a motor, a production pump and a seal section disposed between the motor and the production pump. The pumping system further comprises an auxiliary pump disposed below the motor and an auxiliary adapter connect... | 12/01/2009 |
| 7588076 | Pumping and repairing unit An oil machinery, that includes a pumping and repairing unit comprising: an electrically operated brake, a coupling, a speed reducer, an oil pumping polished rod, a polished rod eye for the oil pumping polished rod, an oil pumping polished rod rope, a balance weight... | 09/15/2009 |
| 7559362 | Downhole flow reversal apparatus A water reinjection arrangement for a coal bed methane well to minimize water disposal problems at the well surface. Water is withdrawn by a motor driven pump from an upper coal seam through openings in the upper portion of the well casing. A flow reversing head is ... | 07/14/2009 |
| 7546870 | Method and system for removing liquid from a gas well A method and system for the removal of produced liquid from a gas well extending from an earth surface through a subterranean gas-bearing formation using a thermodynamic cycle. ... | 06/16/2009 |
| 7530391 | Seal section for electrical submersible pump A seal section for a submersible well pump assembly has a housing for connection between a pump and a motor. A central radial bearing support rotatably supports a drive shaft and defines upper and lower chambers in the housing. A well fluid passageway leads from an ... | 05/12/2009 |
| 7513301 | Liquid aeration plunger A plunger apparatus operates to propel one or more jets of gas through one or more internal orifices and/or nozzles out through an aperture and into a liquid load whereby a transfer of the gas into the liquid load causes turbulent aeration to the liquid load during ... | 04/07/2009 |
| 7481270 | Subsea pumping system A pumping system is disclosed for producing hydrocarbons from a subsea production well with at least one electrical submersible pumping (ESP) hydraulically connected to at least one multiphase pump to boost production fluid flow. ... | 01/27/2009 |
| 7431093 | Protection scheme and method for deployment of artificial lift devices in a wellbore A protection system for an artificial lift device including but not limited to electrical submersible pump (ESP) and an electrical submersible progressing cavity pup (ESPCP). The artificial lift device is suspended on a tubing string into a wellbore where the artifi... | 10/07/2008 |
| 7428929 | Method and apparatus for lifting liquids from gas wells A downhole apparatus and method for maintaining or reducing the level of liquids at the bottom of a gas producing well is described including a constriction or throat section, such as a Venturi, in which a production gas flow from the well is used to generate a low ... | 09/30/2008 |
| 7419007 | Retrievable downhole pumping system A pumping system 10 is provided for pumping fluid from a downhole well to the surface through a production tubing string well. A rotatable drive rod 18 extends from the surface to power the downhole pump, and includes a plurality of rod couplings. The ... | 09/02/2008 |
| 7413009 | System and method for pumping fluids The system and method of the present invention includes an electrical to mechanical converter (EMC), such as a motor, and a hydraulic pump-and-cylinder arrangement that is connected to the electrical to mechanical converter for input, and to a sucker rod pump for ou... | 08/19/2008 |
| 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 |
| 7401645 | Downhole fluid disposal apparatus and methods A seal cartridge and barrel manifold seal are provided for use in a subterranean well and in a method to inject fluid, that is initially produced into the well from a subterranean formation or zone, into another subterranean formation or zone. The seal cartridge has... | 07/22/2008 |
| 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 |
| 7370701 | Wellbore completion design to naturally separate water and solids from oil and gas A wellbore completion design is provided, which creates a convective flow action that separates water and sand from hydrocarbons during production of the hydrocarbons from a subterranean formation. A deviated section of the wellbore creates the desired effect. The w... | 05/13/2008 |
| 7370697 | Thrust section wear preventor A thrust section for use above a motor preferably includes a housing, a thrust shaft, a thrust runner connected to the thrust shaft, a thrust bearing connected to the housing, and a motor lead guard. The motor is preferably positioned above a pump assembly. The thru... | 05/13/2008 |
| 7363983 | ESP/gas lift back-up A well production system has a string of production tubing with a junction having two legs. A first leg is sealed to the casing by a packer located above well perforations. A submersible pump assembly is secured to a second leg, the pump having an intake in the tubi... | 04/29/2008 |
| 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 |
| 7337764 | Pressure balanced bearing A method of pressure balancing across a bearing adjacent to a pressure differential is described. The method primarily includes providing a bypass port around the bearing for allowing a fluid flow from a first pressure side to a second pressure side. A throttle body... | 03/04/2008 |
