With Eduction Pump Or Plunger In Well Patents (Class 166/62)
  • Patent number: 9416598
    Abstract: To protect a hydraulic, electric and/or other conduit in an annular space around a well casing against damage from perforating and other well operations the conduit is arranged in a groove in a U- or V-shaped protective gutter, which is secured to the outer surface of the well casing and which is capable of deflecting a shaped charge.
    Type: Grant
    Filed: May 16, 2012
    Date of Patent: August 16, 2016
    Assignee: Shell Oil Company
    Inventor: William Birch
  • Patent number: 8960273
    Abstract: A method of pumping production fluid from a wellbore includes deploying a centrifugal pump into a production wellbore; and pumping hydrocarbons from the production wellbore by rotating an impeller of the centrifugal pump in the production wellbore from surface using a drive string, wherein the impeller is rotated at a speed less than or equal to seventeen hundred fifty revolutions per minute.
    Type: Grant
    Filed: September 25, 2012
    Date of Patent: February 24, 2015
    Assignee: Oilfield Equipment Development Center Limited
    Inventors: Clayton Bara, Phil Fouillard, Darren Part
  • Publication number: 20150041128
    Abstract: Systems and methods for enhanced delivery of thermal energy to vertical wellbores are disclosed. In one embodiment, a method comprises heating a heat transfer fluid; continuously circulating the heat transfer fluid into a vertical wellbore to a downhole heat exchanger; advancing hot feedwater into the vertical wellbore to the downhole heat exchanger, wherein the downhole heat exchanger is configured to transfer heat from the heat transfer fluid to the hot feedwater to generate high-quality steam; transmitting the steam from the downhole heat exchanger into a subterranean formation, whereby thermal energy from the steam causes a reduction in viscosity of hydrocarbons in the subterranean formation; injecting an acid scale wash to counter scale buildup from the hot feedwater on the downhole heat exchanger; and returning the heat transfer fluid from the downhole heat exchanger to the surface thermal fluid heater for reheating and recirculation into the vertical wellbore.
    Type: Application
    Filed: March 14, 2013
    Publication date: February 12, 2015
    Applicant: FUTURE ENERGY, LLC
    Inventor: Kent B. Hytken
  • Publication number: 20140246195
    Abstract: Method and systems relate to generating steam by transitioning water from supercritical conditions and injecting the steam that results into a formation to facilitate recovery of oil. Pressurizing and heating the water forms a supercritical fluid that may solvate impurities in the water and/or oxidize the impurities. Retaining the impurities in solution and/or oxidation of the impurities limits fouling problems associated with generating the steam from water recycled in thermal processes, such as steam assisted gravity drainage (SAGD), for recovering the oil.
    Type: Application
    Filed: February 11, 2014
    Publication date: September 4, 2014
    Applicant: CONOCOPHILLIPS COMPANY
    Inventors: Scott D. LOVE, Bruce W. GERHOLD, Edward G. LATIMER
  • Publication number: 20140166263
    Abstract: Systems and methods generate steam in hydrocarbon recovery operations and may further enable emulsion separation and product upgrading. The methods rely on indirect boiling of water by contact with a thermal transfer liquid heated to a temperature sufficient to vaporize the water. Examples of the liquid include oils, recovered hydrocarbons, liquid metals and brine. Heating of the liquid may utilize circulation of the liquid across or through a furnace, heat exchangers, or a gas-liquid contactor supplied with hot gas. Further, a solvent for bitumen introduced into the water may also vaporize upon contact with the thermal transfer liquid.
    Type: Application
    Filed: December 5, 2013
    Publication date: June 19, 2014
    Applicant: CONOCOPHILLIPS COMPANY
    Inventors: Peter N. SLATER, Christopher R. COPELAND
  • Patent number: 8740586
    Abstract: A heat exchanger to serve ESP equipment installed on the seabed located in either a caisson or skid. A hot oil line connects the base of the ESP motor with the externally located heat exchanger, allowing hot motor oil to be circulated through coils externally exposed to seawater. The heat from the oil is rejected to the seawater and the cooled oil is reintroduced to the motor via a cold oil line that communicates with the seal section. The heat exchanger arrangement reduces the temperature of an ESP motor, thus allowing the motor to operate longer and more reliably.
    Type: Grant
    Filed: June 28, 2010
    Date of Patent: June 3, 2014
    Assignee: Baker Hughes Incorporated
    Inventors: Ignacio Martinez, Dan A. Merrill
  • Patent number: 8696334
    Abstract: A submersible pumping system for downhole use in extracting fluids containing hydrocarbons from a well. In one embodiment, the pumping system comprises a rotary induction motor, a motor casing, one or more pump stages, and a cooling system. The rotary induction motor rotates a shaft about a longitudinal axis of rotation. The motor casing houses the rotary induction motor such that the rotary induction motor is held in fluid isolation from the fluid being extracted. The pump stages are attached to the shaft outside of the motor casing, and are configured to impart fluid being extracted from the well with an increased pressure. The cooling system is disposed at least partially within the motor casing, and transfers heat generated by operation of the rotary induction motor out of the motor casing.
    Type: Grant
    Filed: April 29, 2008
    Date of Patent: April 15, 2014
    Assignees: Chevron U.S.A. Inc., Los Alamos National Security, LLC
    Inventors: Daniel Francis Alan Hunt, F. Coyne Prenger, Dallas D. Hill, Todd Andrew Jankowski
  • Patent number: 8434554
    Abstract: Disclosed is an installation for using geothermal energy, comprising a main pipe (20) in a borehole (10) of a well. The main pipe (20) has several through-holes (23) to the surroundings and is subdivided into a top and a bottom section by means of a transverse closure (21) that has an opening in which a device or a part of a device (22) generating and/or promoting a flow is disposed. At least one heat-utilizing device (30) is arranged within the main pipe (20) which is surrounded at least in the region of the through-holes (23), preferably everywhere, by a porous bed (11) filing at least some of the remaining hollow space of the borehole (10) around the main pipe (20). The porous bed (11) is hydraulically interrupted within the main pipe (20) by a sealing material (12) at the level of the transverse closure (21). Said installation is used for delivering or dissipating heat, decontaminating especially groundwater, and/or generating power.
    Type: Grant
    Filed: September 22, 2008
    Date of Patent: May 7, 2013
    Assignee: Geon-En Energy Technologies GmbH
    Inventor: Michael Viernickel
  • Publication number: 20130068455
    Abstract: A downhole well pumping assembly has a shroud with an upper section and a lower section sealed from one another. A submersible pump and a gas separator are housed within the upper section of the shroud. The gas separator has a liquid outlet in fluid communication with an intake of the pump, and a gas outlet in fluid communication with the gas outlet in the shroud. A motor is housed within the lower section of the shroud, the motor being coupled to the gas separator for rotating the gas Separator and the pump. A well fluid lower inlet is in the shroud below the motor and a well fluid lower outlet is in the shroud above the motor.
    Type: Application
    Filed: September 14, 2012
    Publication date: March 21, 2013
    Applicant: Baker Hughes Incorporated
    Inventors: Donn J. Brown, Brown L. Wilson, Michael J. Fox
  • Publication number: 20130068454
    Abstract: A system is provided that is capable of providing heat across a produced interval during oil and gas production to minimize or reduce undesirable formation of gas hydrates in the wellbore. In one embodiment, the configuration provides a means to recycle heat generated by an electrical submersible pump. Heat from the pump may be applied downhole. One configuration is capable of providing for downhole separation of gas from produced fluids to reduce or eliminate gas transit through the pump. A heating element also may apply heat to produced fluids. In one embodiment, a system may provide for the safe containment and control of gas within the wellbore by the utilization of a safety valve.
    Type: Application
    Filed: August 14, 2012
    Publication date: March 21, 2013
    Applicant: Chevron, U.S.A. Inc.
    Inventor: George T. Armistead
  • Publication number: 20120298367
    Abstract: An earth loop heat transfer system which, in certain aspects, has a heat transfer loop for providing heat transfer fluid to facilitate production of hydrocarbons from an earth formation; in certain aspects, to facilitate the production of sluggish crude that remains in a formation following known production methods.
    Type: Application
    Filed: May 11, 2012
    Publication date: November 29, 2012
    Inventor: Guy Lamonte McClung, III
  • Patent number: 8079417
    Abstract: A non-rigid carrier conveys a pump and/or the steam generator through a bore of the production tubing string to support enhanced oil recovery operations. An annular space separates the production tubing string and a wall of a wellbore intersecting a hydrocarbon-bearing subterranean formation. Using the non-rigid carrier, the steam generator is conveyed into the wellbore and operated to inject hot gases into the formation through the perforations in the casing. Afterwards, the steam generator is conveyed out of the cased wellbore and the pump is conveyed into the cased wellbore and operated to pump hydrocarbons to the surface. For cyclic injection operations, the pump may be retrieved to the surface and the steam generator may be returned into the well. The production tubing string, such as a production tubing, remains in the well while the pump and/or the steam generator are conveyed up and down the cased well. A base installed in the cased well receives either the pump or the steam generator.
    Type: Grant
    Filed: August 13, 2008
    Date of Patent: December 20, 2011
    Assignee: ConocoPhillips Company
    Inventors: Dennis C. Wegener, Riley B. Needham, David R. Zornes, Partha S. Sarathi
  • Patent number: 8037936
    Abstract: A system and method is provided for heating fluid to be pumped by an electrical submersible pumping system. Heat for heating the fluid may be inductively generated by adjusting the power delivered to the motor of the pumping system. In one example, the power adjustment includes supplying the voltage applied to the pump motor to a value less than voltage applied during normal operations. While lowering the voltage the electrical frequency may be varied as well as the electrical waveform.
    Type: Grant
    Filed: January 16, 2009
    Date of Patent: October 18, 2011
    Assignee: Baker Hughes Incorporated
    Inventors: David H. Neuroth, Peter F. Lawson, Jim F. Evenson
  • Patent number: 7959814
    Abstract: The present invention provides a system and method for producing hot water without a flame. The system and method heats water to at least a specified temperature without a flame by providing a source of water and a prime mover, pumping water from the source of water into one or more heat exchangers, pre-heating the water using the one or more heat exchangers, heating the pre-heated water to at least the specified temperature without a flame using a dynamic heat generator driven by the prime mover, using the heated water in the one or more heat exchangers to pre-heat the water and providing the heated water to an output.
    Type: Grant
    Filed: October 13, 2010
    Date of Patent: June 14, 2011
    Assignee: OmniTherm, Inc.
    Inventors: W. James Masters, Douglas W. Fugate, Edwin W. Wilson, John T. Johnson, III, W. Jason Masters
  • Patent number: 7942197
    Abstract: A system that includes a plurality of heat sources configured to heat a portion of a formation is described. At least one production well is in the formation. A bottom portion of the production well is a sump in an underburden of the formation below the heated portion of the formation. Fluids from the heated portion of the formation are allowed to flow into the sump. A pump system has an inlet in the sump. A production conduit is coupled to the pump system. The production conduit is configured to transport fluids in the sump out of the formation.
    Type: Grant
    Filed: April 21, 2006
    Date of Patent: May 17, 2011
    Assignee: Shell Oil Company
    Inventors: Michael David Fairbanks, Thomas Joseph Keltner, Billy John McKinzie, II, Stephen Palmer Hirshblond
  • Patent number: 7870904
    Abstract: A method and apparatus for enhanced recovery of petroleum fluids from the subsurface by injection of a steam and hydrocarbon vaporized solvent in contact with the oil sand formation and the heavy oil and bitumen in situ. Multiple propped hydraulic fractures are constructed from the well bore into the oil sand formation and filled with a highly permeable proppant. Steam, a hydrocarbon solvent, and a non-condensing diluent gas are injected into the propped fractures, and flows upwards and outwards to contact and heat the in situ bitumen, which softens and flows by gravity to the well bore, and is pumped to the surface where the solvent can be recycled for further injection.
    Type: Grant
    Filed: February 12, 2009
    Date of Patent: January 18, 2011
    Assignee: GeoSierra LLC
    Inventor: Grant Hocking
  • Patent number: 7854260
    Abstract: A downhole arrangement including an outer housing, an inner housing disposed within the outer housing and defining with the outer housing a chamber, a turbine disposed within the chamber, and one or more nozzles disposed at the chamber capable of exhausting steam into the chamber. A method for moving a target fluid within a wellbore.
    Type: Grant
    Filed: July 21, 2008
    Date of Patent: December 21, 2010
    Assignee: Baker Hughes Incorporated
    Inventors: Sean L. Gaudette, Bennett M. Richard
  • Publication number: 20100276147
    Abstract: The present invention involves a method and apparatus for enhanced recovery of petroleum fluids from the subsurface by injection of a steam and hydrocarbon vaporized solvent in contact with the oil sand formation and the heavy oil and bitumen in situ. Multiple propped hydraulic fractures are constructed from the well bore into the oil sand formation and filled with a highly permeable proppant. Steam, a hydrocarbon solvent, and a non-condensing diluent gas are injected into the well bore and the propped fractures. The injected gas flows upwards and outwards in the propped fractures contacting the oil sands and in situ bitumen on the vertical faces of the propped fractures. The steam condenses on the cool bitumen and thus heats the bitumen by conduction, while the hydrocarbon solvent vapors diffuse into the bitumen from the vertical faces of the propped fractures.
    Type: Application
    Filed: February 12, 2009
    Publication date: November 4, 2010
    Inventor: Grant Hocking
  • Patent number: 7743826
    Abstract: A system and process is disclosed for retorting oil shale and extracting shale oil and other hydrocarbons therefrom, in which a cased heat delivery well is drilled generally vertically through an overburden and then through a body of oil shale to be retorted to the bottom thereof, generally horizontally under the body of oil shale to be retorted, and then back to the earth surface. Heat energy is transmitted conductively to the body of oil shale to be retorted from a closed loop heat delivery module in the well, the module comprising a fluid transmission pipe containing a heating fluid heated to at least a retorting temperature. Heat energy is also transmitted to the body of oil shale to be retorted above the fluid transmission pipe by vapor conduits that conduct retort vapors upward through the body of oil shale to be retorted; the ascending retort vapors condense and reflux, delivering their latent heat of vaporization to the body of oil shale to be retorted, and the condensed retort liquids descend.
    Type: Grant
    Filed: January 19, 2007
    Date of Patent: June 29, 2010
    Assignee: American Shale Oil, LLC
    Inventors: Harry Gordon Harris, Paul Lerwick, R. Glenn Vawter
  • Patent number: 7699097
    Abstract: A mover stabilizing and stator cooling arrangement includes an upper sleeve surrounding the mover of the linear motor, a lower sleeve, a thermoconducting sleeve surrounding the stator and axially connected between the upper sleeve and the lower sleeve. The arrangement further includes a thermal grease filled in the space defined between the upper sleeve and the mover, the space defined between the thermoconducting sleeve and the stator, and the space defined between the lower sleeve and the outer tube for quick dissipation of waste heat. A stabilizer ring is set between the upper sleeve and the mover to stabilize axial movement of the mover. A piston and multiple one-way valve sets are mounted in the space between the lower sleeve and the outer tube for allowing adjustment of the volume in the thermoconducting sleeve responsive to expansion/contraction of the thermal grease due to temperature changes.
    Type: Grant
    Filed: June 11, 2008
    Date of Patent: April 20, 2010
    Assignee: Digitek Technology Co., Ltd.
    Inventors: Kuei-Hsien Shen, Chinn-Chann Chiang
  • Publication number: 20090272533
    Abstract: A system for treating a subsurface hydrocarbon containing formation includes one or more shafts. A first substantially horizontal or inclined tunnel extends from one or more of the shafts. A second substantially horizontal or inclined tunnel extends from one or more of the shafts. Two or more heat source wellbores extend from the first tunnel to the second tunnel. The heat source wellbores are configured to allow heated fluid to flow through the wellbores from the first tunnel to the second tunnel.
    Type: Application
    Filed: April 10, 2009
    Publication date: November 5, 2009
    Inventors: David Booth Burns, Horng Jye (Jay) Hwang, Jochen Marwede, Duncan Charles MacDonald, Robert George Prince-Wright
  • Patent number: 7610964
    Abstract: A submersible pumping system for use downhole that includes a housing containing an expandable fluid, that when expanded pushes a piston that in turn pumps wellbore fluid to the surface. The expandable fluid can be a silicon based heat transfer fluid with a coefficient of thermal expansion of at least about 0.0005 in3/in3/° F. The expandable fluid is expanded upon exposure to heat. A heat source is selectively activated for expanding the fluid.
    Type: Grant
    Filed: January 18, 2008
    Date of Patent: November 3, 2009
    Assignee: Baker Hughes Incorporated
    Inventor: Don C. Cox
  • Publication number: 20090250204
    Abstract: Presented is a system for extracting subsurface oil using microwave or RF energy generated above the ground surface, and directed to an underground oil bearing location using a coaxial transmission line functioning as a wave guide.
    Type: Application
    Filed: April 3, 2009
    Publication date: October 8, 2009
    Inventor: GEORGE M. HARRIS
  • Patent number: 7597138
    Abstract: The present invention features ground water heat transfer systems utilizing polypipes. A typical system of the invention comprises (1) a water pump which is suspended or affixed in a deep well and connected to at least one inlet polypipe, where the inlet polypipe(s) is extended to the bottom of the well and comprises a bottom portion including one or more openings; (2) a heat exchange system connected to the water pump; and (3) a return pipe connected to the heat transfer system and having an outlet extending below the water level in the well. The opening(s) at or near the bottom of the inlet polypipe(s) allow water to enter the polypipe(s) and be pumped to the heat exchange system. After heat exchange, the water can be returned to the same well or different well(s) through the return pipe(s). In many cases, the systems of the invention are open-loop systems.
    Type: Grant
    Filed: January 25, 2007
    Date of Patent: October 6, 2009
    Assignee: American Refining Group, Inc.
    Inventor: Albert A. Koenig
  • Publication number: 20090178803
    Abstract: A system and method is provided for heating fluid to be pumped by an electrical submersible pumping system. Heat for heating the fluid may be inductively generated by adjusting the power delivered to the motor of the pumping system. In one example, the power adjustment includes supplying the voltage applied to the pump motor to a value less than voltage applied during normal operations. While lowering the voltage the electrical frequency may be varied as well as the electrical waveform.
    Type: Application
    Filed: January 16, 2009
    Publication date: July 16, 2009
    Applicant: BAKER HUGHES INCORPORATED
    Inventors: David H. Neuroth, Peter F. Lawson, Jim F. Evenson
  • Publication number: 20090145606
    Abstract: The present invention involves a method and apparatus for enhanced recovery of petroleum fluids from the subsurface by injection of a steam and hydrocarbon vaporized solvent in contact with the oil sand formation and the heavy oil and bitumen in situ. Multiple propped hydraulic fractures are constructed from the well bore into the oil sand formation and filled with a highly permeable proppant. Steam, a hydrocarbon solvent, and a non-condensing diluent gas are injected into the well bore and the propped fractures. The injected gas flows upwards and outwards in the propped fractures contacting the oil sands and in situ bitumen on the vertical faces of the propped fractures. The steam condenses on the cool bitumen and thus heats the bitumen by conduction, while the hydrocarbon solvent vapors diffuse into the bitumen from the vertical faces of the propped fractures.
    Type: Application
    Filed: February 12, 2009
    Publication date: June 11, 2009
    Inventor: Grant Hocking
  • Patent number: 7464755
    Abstract: Methods and systems and are described for isolating or manipulating a sample of a heavy oil composition from a hydrocarbon reservoir. One method embodiment of the invention comprises circulating a heated fluid in a first region of a reservoir where a heavy oil composition is present or believed present using a surface pump and a well completion comprising a downhole pump for a time and flow rate sufficient to produce flowable heavy oil composition, the well completion comprising a sampling tool; and sampling the flowable heavy oil composition using the sampling tool. This abstract complies with rules requiring an abstract. It should not be used to limit the scope or meaning of the claims. 37 CFR 1.72(b).
    Type: Grant
    Filed: December 12, 2006
    Date of Patent: December 16, 2008
    Assignee: Schlumberger Technology Corporation
    Inventor: John Edwards
  • Patent number: 7363979
    Abstract: A down hole heating system for use with oil and gas wells which exhibit less than optimally achievable flow rates because of high oil viscosity and/or blockage by paraffin (or similar meltable petroleum byproducts). The heating unit the present invention includes shielding to prevent physical damage and shortages to electrical connections within the heating unit while down hole (a previously unrecognized source of system failures in prior art systems). The over-all heating system also includes heat retaining components to focus and contain heat in the production zone to promote flow to, and not just within, the production tubing.
    Type: Grant
    Filed: January 24, 2005
    Date of Patent: April 29, 2008
    Inventor: William Hill
  • Patent number: 7320364
    Abstract: Certain embodiments provide a method for treating a subsurface formation. The method includes using heaters to form a heated portion of the subsurface formation. A production conduit is used to direct formation fluid in a vapor phase from the heated portion of the subsurface formation towards a surface of the subsurface formation. Condensate of the vapor phase formation fluid is formed in or near the production conduit. Condensate of the vapor phase formation fluid is diverted to a desired location.
    Type: Grant
    Filed: April 22, 2005
    Date of Patent: January 22, 2008
    Assignee: Shell Oil Company
    Inventor: Michael David Fairbanks
  • Patent number: 7299873
    Abstract: The production rate, useful life and operating efficiency of electric submergible pumping systems (ESP) is improved by operating the system so that the motor (220, 320) is cooled by two passes of production. Production fluids remove waste heat from the motor (220, 320) by passing the fluid in contact with the exterior of the motor (220, 320). The improved cooling permits the motor to be operated at a lower temperature improving life and efficiency, and/or to be operated at higher power at a similar temperature. Additionally, oversized and excess equipment is not required, further improving performance and economics for the user. In another aspect, the invention is a method of pumping fluids using a motor having vortex generators (366) on its exterior surfaces or on the interior surfaces of a surrounding shroud.
    Type: Grant
    Filed: March 11, 2002
    Date of Patent: November 27, 2007
    Assignee: Centriflow LLC
    Inventors: Elaine Hartman, legal representative, Eric M. Moe, Robert E. Breidenthal, Jesse Rehr, Michael G. Hartman, deceased
  • Patent number: 7246662
    Abstract: A device for determining a location of an interface between a first fluid and second fluid includes a non-mechanical sensor that measures a selected parameter of interest relating to the fluid surrounding the sensor (“the surrounding fluid”) and a processor for processing the sensor measurements. The non-mechanical sensor measures a parameter relating to the surround fluid without physically co-acting with the surrounding fluid. Exemplary parameters such as thermal properties, electrical properties, fluid properties, and magnetic properties can be measured. The processor is programmed to process the sensor measurements to identify one or more characteristics in the measurements that can indicate the nature of the fluid being measured and thereby determine the location of the interface. The determined location can be used to operate a downhole device such as a pump, to provide real-time monitoring of well conditions, to record data for long-term reservoir characterization, or to actuate an alarm.
    Type: Grant
    Filed: March 30, 2004
    Date of Patent: July 24, 2007
    Assignee: Core Laboratories Canada Ltd
    Inventors: Kirby Jabusch, Colin Bussiere
  • Patent number: 7037105
    Abstract: An apparatus for warming objects such as production conduits at a well site comprises an internal combustion engine driving a well pump. A heat exchanger shell is connected to an exhaust port of the engine, and has an output port. A circulating pump is driven by the engine, and a heating circuit is connected to the circulating pump such that liquid in the heating circuit is pumped from a pump output of the circulating pump through the heating circuit to a pump intake of the circulating pump. The heating circuit comprises a heat absorbing portion inside the heat exchanger shell arranged such that heat from the exhaust of the engine is transferred to the liquid therein, and a heating conduit arranged adjacent to a production conduit or other desired object such that heat from the liquid in the heating conduit is transferred to the object.
    Type: Grant
    Filed: April 13, 2005
    Date of Patent: May 2, 2006
    Inventor: Gerald Hayes
  • Publication number: 20040238174
    Abstract: The present invention is directed to an apparatus and a method for cleaning the open perforations in a well and for bailing a well. The apparatus has a tubular conduit with at least one seal attached to it that forms a seal between the well casing and the exterior of the conduit. The seal is held in place on the tubular conduit by two shoulders formed where the upper and lower sections of the conduit meet a middle section. The upper end of the conduit is adapted to releasably engage the lower end of a bailer. The upper end of the conduit releasably engages the middle section and can be removed to replace the seals when worn. The apparatus has a valve section designed to releasably engage the lower end of the tubular conduit or the lower end of a bailer.
    Type: Application
    Filed: May 30, 2003
    Publication date: December 2, 2004
    Inventor: Morley Sebree
  • Patent number: 6691782
    Abstract: A method and system for downhole treatment and pumping of well fluids enhances the pumping of viscous fluids to the surface. The first step is to separate the oil and water from the well fluid and then channel the oil to a chamber that encloses the motor. The heat from the motor will increase the heat of the crude oil flowing past the motor, thereby lowering the viscosity of the crude oil. The water flows separately past the motor in another passageway, and remixes with the oil. After the oil and water recombine, the treated well fluid has a lower viscosity, and the fluid is then pumped to the surface more efficiently than without treating the oil.
    Type: Grant
    Filed: January 28, 2002
    Date of Patent: February 17, 2004
    Assignee: Baker Hughes Incorporated
    Inventor: Joseph E. Vandevier
  • Patent number: 6598681
    Abstract: The present invention provides a electric submersible pump assembly for producing a fluid from a production zone to the surface and operated independently by one or more electric submersible motors using a dual or multiple gearbox, the electric submersible pump assembly including an inlet pump having a section head into which fluid enters from the production zone to the inlet pump, an outlet pump having an intake section communicating with the inlet pump so that fluid received therefrom is discharged through the outlet pump, an electric submersible motor, a first motor interface that connects the electric submersible motor to the inlet pump, and a second motor interface that connects the electric submersible motor to the outlet pump; each motor interface having a gearbox that connects to the electric submersible motor, a pump shaft connector that connects to the pump, and a seal section that joins the pump shaft connector to the gearbox.
    Type: Grant
    Filed: August 15, 2001
    Date of Patent: July 29, 2003
    Assignee: Wood Group ESP, Inc.
    Inventor: Michael R. Berry
  • Patent number: 6564874
    Abstract: A viscosity handling system for facilitating the movement of certain fluids. The system utilizes kinetic energy in the form of a rapidly and repetitively moving component that imparts energy in the form of heat to surrounding fluid. The system is particularly useful in applications, such as downhole pumping systems, used to produce hydrocarbon-based fluids from beneath the surface of the earth.
    Type: Grant
    Filed: July 11, 2001
    Date of Patent: May 20, 2003
    Assignee: Schlumberger Technology Corporation
    Inventor: Diego Narvaez
  • Publication number: 20020157832
    Abstract: An apparatus for reducing paraffin and asphaltene deposits in a pumping oil well including a polish rod having a portion extending outwardly of the earth and having a portion extending into an oil string tubing, a sucker rod string interconnected to the polish rod and extending through the oil string casing into the earth, and an insulating rod interconnected to a lower end of the polish rod and interconnected to an upper end of the sucker rod string. The insulating rod is formed of a material having a thermal conductivity of 0.0167 to 0.06 BTU/(sq.ft.)(hr)(deg.F)(ft). The insulating rod is formed of a body of fiberglass material, an upper connector affixed to the body and formed of a steel material, and a lower connector affixed to the body and formed of a steel material.
    Type: Application
    Filed: April 30, 2001
    Publication date: October 31, 2002
    Inventor: Raj K. Prasad
  • Publication number: 20020153141
    Abstract: The production rate, useful life and operating efficiency of electric submergible pumping systems (ESP) is improved by operating the system so that the motor is cooled by two passes of production. The two passes of production fluid are achieved by employing a shroud with the inlet at the opposite end of the production fluid intake or by installing the motor below the perforations that allow production fluids to enter a well. The motor is designed with an internal conduit through which the production fluids are pumped. Production fluids remove waste heat from the motor by passing in fluid contact with the exterior of the motor and again by passing through the internal conduit of the motor. The improved cooling permits the motor to be operated at a lower temperature improving life and efficiency, and/or to be operated at higher power at a similar temperature. Additionally, oversized and excess equipment is not required, further improving performance and economics for the user.
    Type: Application
    Filed: April 19, 2001
    Publication date: October 24, 2002
    Inventors: Michael G. Hartman, Eric M. Moe, Robert E. Breidenthal, Jesse S. Rehr
  • Patent number: 6343652
    Abstract: A method and apparatus for unplugging a well or pipe obstructed by a gas hydrates. According to the invention, a moving heating element is applied against one end of the hydrate plug, and is displaced axially in the tube or the pipe towards the other end, so as to cause the plug to melt progressively from one end to the other. Application to the oil industry, in particular in off-shore wells.
    Type: Grant
    Filed: March 6, 2000
    Date of Patent: February 5, 2002
    Assignee: Drillflex
    Inventors: Pierre-Yves Corre, James Leighton, Jean-Louis Saltel
  • Patent number: 6318467
    Abstract: A system for pumping and heating viscous fluids in a wellbore includes electrical power supplies, a switchboard, conductors, and a submergible pumping system having a pump and a submergible electric motor. The electrical power supplies are coupled to the submergible pumping system through a switchboard and conductors that supply electrical power to the motor. The electrical power supplies provide direct or alternating current and include protective circuitry. The submergible pumping system may be supplied with electrical power to motor stator windings to generate heat to raise the temperature and lower the viscosity of adjacent viscous fluids.
    Type: Grant
    Filed: December 1, 1999
    Date of Patent: November 20, 2001
    Assignee: Camco International, Inc.
    Inventors: Joseph C. Liu, Rick Bailey
  • Patent number: 6206093
    Abstract: A system allows the pumping of viscous fluids from a wellbore. The system includes a submergible pump and a pump intake through which a fluid may be drawn. A submergible electric motor powers the submergible pump, and a heater is connected in the pumping system to heat the wellbore fluid. Additionally, a combination of heaters may be employed to heat the desired production fluid both externally to the pumping system and internally to the pumping system.
    Type: Grant
    Filed: February 24, 1999
    Date of Patent: March 27, 2001
    Assignee: Camco International Inc.
    Inventors: Woon Yung Lee, Diego Narvaez, Ketankumar K. Sheth, William B. Newberry
  • Patent number: 6092598
    Abstract: A sensor assembly is used with a submergible pumping system within a wellbore. The sensor assembly is an integral part of the string of submergible components that form the submergible pumping system. One embodiment of the sensor assembly utilizes a sensor for detecting the axial downthrust load acting on the shaft of a submergible pump. The downthrust load can be used to determine, for instance, flow rate through the submergible pump.
    Type: Grant
    Filed: August 17, 1998
    Date of Patent: July 25, 2000
    Assignee: Camco International, Inc.
    Inventor: Stephen M. Breit
  • Patent number: 6039121
    Abstract: extending into a hot subterranean hydrocarbon-bearing formation containing water at greater than 100.degree. C. The wellbore is divided into three co-extensive passageways; an annulus, and first and second conduits. The annulus is formed within the wellbore between a block at its bottom above the completion intervals and an outlet at the wellhead. The first conduit extends from the formation, through the bottom of the annulus and to an outlet at an elevation intermediate up the annulus. The first conduit is insulated between the bottom of the annulus and its outlet. A second conduit extends between the bottom of the annulus and an outlet at the wellhead. In operation, by producing fluid from the annulus and the second conduit outlets at the wellhead, formation fluid is induced to rise up the first conduit. While the fluid rises, contained water flashes providing steam-enhanced lift.
    Type: Grant
    Filed: August 28, 1997
    Date of Patent: March 21, 2000
    Assignee: Rangewest Technologies Ltd.
    Inventor: Kenneth Edwin Kisman
  • Patent number: 6006837
    Abstract: A system for heating viscous fluids in a wellbore includes a submergible pumping system comprising a pump and submergible electric motor. A heating unit is coupled to the pumping system and is supplied with electrical energy through a cable used to supply electrical energy to the motor. The heating unit may include a direct or alternating current heater and protective circuitry. The heating unit may be supplied with electrical energy through the motor stator windings or via a jumper arranged in parallel with the stator windings. Switches may be included in the heating unit and in a motor base for energizing the motor and the heating unit based upon sensed temperatures of the viscous fluids surrounding the pumping system.
    Type: Grant
    Filed: November 17, 1997
    Date of Patent: December 28, 1999
    Assignee: Camco International Inc.
    Inventor: Stephen M. Breit
  • Patent number: 5620048
    Abstract: Oil-well installation extending from the surface (14) to an oil-bearing rock stratum (16) comprising a tubing (20), arranged in the well and forming a flow channel to the surface for hydrocarbons originating from the oil-bearing rock stratum, a casing (18) delimiting the wall of the well, and a seal (24) arranged at the well bottom between the tubing (20) and the casing (18) so as to form a chamber (26) isolated from the hydrocarbons, the installation furthermore comprising, in the well, a pump (30, 48) and an electric motor (34, 46) which is intended to actuate the pump. According to the invention, the stator (40, 52) of the electric motor (34, 46) is arranged outside the tubing (20) and isolated thereby from the hydrocarbons flowing inside the tubing.
    Type: Grant
    Filed: September 29, 1995
    Date of Patent: April 15, 1997
    Assignee: Elf Aquitaine Production
    Inventor: Jean-Louis Beauquin
  • Patent number: 5607018
    Abstract: A horizontal well completion apparatus and method for heavy, viscous oil in a producing zone (114) are disclosed using a single well. Hot injection fluid is injected into an injection string (120), and emitted through steam distribution holes (133) in the lower portion (120) of the injection string into the casing (116) near perforations (118). A packer (126) separates the upper well annulus (140) from the lower well annulus (142) Insulation (121) surrounds injection tubing string (120) between the packer (126) and the well head (111). Perforations (118) in the horizontal portion (112) of the well allow heated oil to flow into the lower annulus 42 in the horizontal portion (112) of the well where is picked up by the injected fluid and lifted to the surface of the well by a jet pump (128). Temperature and pressure in the lower well annulus (142) are controlled by the temperature and pressure of the injection fluid, and the pumping rate of the produced fluids.
    Type: Grant
    Filed: September 29, 1994
    Date of Patent: March 4, 1997
    Inventor: Frank J. Schuh
  • Patent number: 5553666
    Abstract: A standoff insulator and support for an elongated power cable disposed adjacent to a fluid conducting tubing string for a fluid production well utilizing an electric submersible pump connected to the tubing string. The pump power cable is held in a standoff, thermally insulated position from the tubing string by an elastomer insulator body having opposed concave surfaces engageable with the power cable and the tubing string and a flexible strap trained through a slot along one side of the insulator and through a channel on the opposite side of the insulator. The strap includes a buckle for receiving a distal end of the strap whereby the strap is tensioned and secured to clamp the insulator between the power cable and the tubing string using strap tensioning and crimping tools, respectively.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: September 10, 1996
    Assignee: Atlantic Richfield Company
    Inventor: Chris J. Hartman
  • Patent number: 5126037
    Abstract: A separate heat source, such an a skin effect heater, is added to a subterranean heat exchanger and oxygen combustion device for upgrading viscous crude oil feeds. An insulated wire is integrated with combustion oxygen supply piping to form the skin effect heater operating in conjunction with the heat exchanger. The separately controlled heater output allows a reduction of the heat from the combustion device reduced quantities of combustion products. The improvement down-sizes or eliminates excess combustion product removal facilitates and also preheats the oxygen supply. The skin-effect heater and heat exchanger combination adds heat gradually and increases feed residence time at the desired upgrading temperature and pressure conditions. Alternative embodiments can be used to treat heavy crudes within a producing well.
    Type: Grant
    Filed: May 4, 1990
    Date of Patent: June 30, 1992
    Assignee: Union Oil Company of California
    Inventor: William E. Showalter
  • Patent number: 5040605
    Abstract: A method and apparatus are provided for the recovery of a heavy oil, contained in an outcropping formation, without any significant adverse environmental impact. Broadly, the invention comprises indirectly heating an oil containing formation to reduce the viscosity of the oil therein and concurrently thermally insulating an upper portion of the well, extending into the formation, to eliminate any increased seepage of oil from the formation to the surface.
    Type: Grant
    Filed: June 29, 1990
    Date of Patent: August 20, 1991
    Assignee: Union Oil Company of California
    Inventor: William E. Showalter
  • Patent number: 5009264
    Abstract: A well production apparatus includes a tubular production conduit which extends from the top of the well to a production zone interior of casing. An electric submersible pump has a production fluid flow passageway which communicates between the exterior of the conduit and the interior of the casing. A packer is in communication with the production conduit below the pump and is movable into sealing engagement with the casing to isolate the production zone. A thermal absorber is carried on the production conduit between upper and lower production conduit members whereby subsequent to positioning of the packer assembly into set position, thermal expansion or contraction of the conduit above the set packer is absorbed by the thermal absorber without transmission of thermal expansion or contraction of the conduit to the pump.
    Type: Grant
    Filed: May 23, 1990
    Date of Patent: April 23, 1991
    Assignee: Baker Hughes Incorporated
    Inventors: Kris M. Sliger, Randolph C. Moeller, Scott E. Williamson