Dissolving Or Preventing Formation Of Solid Oil Deposit Patents (Class 166/304)
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Patent number: 7353873Abstract: An apparatus and method for controlling and/or minimizing the formation or accumulation of unwanted deposits on the inside of fluid flow paths by employing at various locations along the path an assembly of permanent magnets oriented such that the fluid flow is preferably from the North magnetic pole to the South magnetic pole.Type: GrantFiled: September 7, 2005Date of Patent: April 8, 2008Inventors: Terence Borst, Dudley J. Perio, Jr., Daniel Scott Alms
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Patent number: 7350572Abstract: A method of treatment of subterranean formations in which leakoff through natural fractures is controlled through the use of fibers. The method involves pumping a mixture of a formation treatment fluid and a fiber into the formation for matrix stimulation, fracture stimulation, diversion, and/or water control. In carbonate formations, the formation treatment fluid is preferably an in situ gelled acid. The method optionally also involves pumping the same or a different formation treatment fluid without fiber.Type: GrantFiled: August 18, 2005Date of Patent: April 1, 2008Assignee: Schlumberger Technology CorporationInventors: Christopher Fredd, Bernhard Lungwitz, Brad Holms, John Engels
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Patent number: 7343978Abstract: A scale dissolver fluid for dissolving scale in a subterranean hydrocarbon-bearing formation comprises an effective amount of a scale dissolver formulation and an effective amount of a surfactant for controlling the viscosity of the fluid. In use, formation hydrocarbons act on the surfactant to reduce the viscosity of the fluid so that the fluid selectively invades a hydrocarbon-bearing zone of the formation.Type: GrantFiled: November 9, 2006Date of Patent: March 18, 2008Assignee: Schlumberger Technology CorporationInventors: Timothy Gareth John Jones, Gary John Tustin, Philip Fletcher, Jesse Ching-Wang Lee
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Patent number: 7318476Abstract: 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 vessel and a well for selectively controlling the flow of the chemical from the pressure vessel to the well. A pressurized gas is disposed in the pressure vessel wherein the pressure exerted by the pressurized gas causes the chemical to flow from the pressure vessel to the well through the first valve when the first valve is opened. A second controllably operated valve is disposed in fluid communication between the well and an outlet of a fluid tank for selectively controlling flow of fluid in the tank to the well. The fluid tank is replenished by fluid produced from the well. The system includes a controller for selectively operating the first valve and the second valve.Type: GrantFiled: November 16, 2004Date of Patent: January 15, 2008Inventor: Robert M. Ayres
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Patent number: 7318477Abstract: The invention generally relates to a spacer system for cleaning a section of a subterranean well borehole and casing prior to cementing. The spacer system of the invention comprises a at least one alkyl ether citrate and, optionally, at least one alcohol ethoxylate.Type: GrantFiled: May 10, 2005Date of Patent: January 15, 2008Assignee: Akzo Nobel N.V.Inventor: Wangqi Hou
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Patent number: 7296627Abstract: A method for cleaning oil wells to increase the flow of oil thereof by use of a unique aqueous cleaning emulsion comprising of water, hydrocarbon solvent, detergent and mineral acid. This one step method provides for the simultaneously cleaning/removal of asphaltine and/or paraffin and scale. This method can be used alone or with the assistance of a wash tool which is a combination pressure and surge wash tool having a nipple assembly. A by-pass port is coupled to the nipple assembly and a diverter cup is coupled to the by-pass port. A plurality of pressure wash cups are positioned on the tool. A pressure wash port is located between the plurality of pressure wash cups and a pump shoe assembly is coupled to a bottom pressure wash cup.Type: GrantFiled: March 29, 2005Date of Patent: November 20, 2007Inventor: Richard J. Dyer
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Publication number: 20070251693Abstract: A composition is provided for delivering an organic solvent to a downhole portion of a wellbore for the production of hydrocarbon or to a portion of a pipeline for the transmission of hydrocarbon. The composition comprises: (A) water; (B) a weighting agent; (C) an organic solvent that is immiscible with water; and (D) a surfactant adapted for forming an oil-external emulsion of the organic solvent and the water, wherein the surfactant is unstable to hydrolysis. The composition is formed to be an oil-external emulsion. The density of the composition is formulated to be greater than that of pure water at standard temperature and pressure. A method is provided for delivering an organic solvent to a downhole portion of a wellbore for the production of hydrocarbon or to a portion of a pipeline for the transmission of hydrocarbon. The method comprises the steps of: (A) forming a composition according to the invention; and (B) introducing the composition into the wellbore or into the pipeline.Type: ApplicationFiled: April 18, 2007Publication date: November 1, 2007Inventors: Gary J. Cheramie, Richard W. Pauls
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Patent number: 7285762Abstract: Apparatus and method for melting material in the annulus of an oil or gas well and thereby sealing the annulus to prevent shallow gas leakage and the like. Conveniently, the material is positioned within the annulus between the production and surface casing of the well and above the well cement. A heating tool is lowered into position and provides the necessary heat to melt the material. The heating tool may be removed following the sealing of the annulus.Type: GrantFiled: February 27, 2002Date of Patent: October 23, 2007Inventor: Homer L. Spencer
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Patent number: 7278488Abstract: A method of foam emulsion well cleanout for gas well. An emulsifier apparatus is provided having a compressed air inlet, a foaming solution inlet and a foam outlet. The compressed air inlet is connected to a source of compressed air capable of supplying compressed air to the emulsifier apparatus within a range of selected pressures. The foaming solution is connected to a source of foaming solution capable of supplying foaming solution to the emulsifier apparatus within a range of selected pressures. The foam outlet is connected to a discharge conduit supplying foam to a gas well. The production of foam is initiated out of the foam outlet of the emulsifier apparatus by supplying compressed air to the emulsifier apparatus through the compressed air inlet at a rate of approximately 300 to 400 c.f.m. and at pressures within a range of 175 p.s.i and 375 p.s.i.Type: GrantFiled: March 7, 2007Date of Patent: October 9, 2007Inventor: Al Leduc
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Patent number: 7264056Abstract: A method for mitigating the deposition of wax on production tubing walls. The method comprises positioning at least one ultrasonic frequency generating device adjacent the production tubing walls and producing at least one ultrasonic frequency thereby disintegrating the wax and inhibiting the wax from attaching to the production tubing walls. A system for mitigating the deposition of wax on production tubing walls is also provided.Type: GrantFiled: September 12, 2003Date of Patent: September 4, 2007Assignee: University of WyomingInventor: Brian F. Towler
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Patent number: 7265079Abstract: A composition and method are given for self-destructive fluid loss additives and filter cakes in wellbores and subterranean formations. The fluid loss additives and filter cakes are formed from a mixture of particulate solid acid-precursors, such as a polylactic acid or a polyglycolic acid, and particulate solid acid-reactive materials, such as magnesium oxide or calcium carbonate. In the presence of water, the solid acid-precursors hydrolyze and dissolve, generating acids that then dissolve the solid acid-reactive materials. The composition is used in oilfield treatments such as drilling, completion and stimulation where it disappears when it is no longer needed without the use of mechanical means or injection of additional fluids.Type: GrantFiled: October 17, 2003Date of Patent: September 4, 2007Assignee: Schlumberger Technology CorporationInventors: Dean Willberg, Keith Dismuke
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Patent number: 7243726Abstract: A method that is usable with a well includes injecting a chemical through a chemical injection line into a flow that passes through a well pump. The method includes controlling the injection of the chemical to enhance the flow through the pump.Type: GrantFiled: November 9, 2004Date of Patent: July 17, 2007Assignee: Schlumberger Technology CorporationInventor: Herve Ohmer
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Patent number: 7234523Abstract: A method and apparatus for heating a portion of a subsea structure is provided. The method includes pumping a fluid through a length of tubing such that the temperature of the fluid increases. The temperature increase of the fluid is created by friction in the tubing, and may be also be created by at least one pressure reducing device such as an orifice, pressure reducing valve, or relief valve. A subsea structure may be heated by transferring heat from fluid circulating in a closed loop configuration or by direct application of fluid to the subsea structure using a nozzle. A remotely operated vehicle may be utilized to transport some or all of the equipment necessary, including pumps, tubing, heat exchangers, nozzles and tanks. The remotely operated vehicle provides power to the pumps used for circulating fluid through the tubing.Type: GrantFiled: December 5, 2005Date of Patent: June 26, 2007Assignee: Saipem America Inc.Inventor: B. J. Reid
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Patent number: 7234524Abstract: A system monitors and controls the injection of additives into formation fluids recovered through a subsea well. The system includes a chemical injection unit and a controller positioned at a remote subsea location. The injection unit uses a pump to supply one or more selected additives from a subsea and/or remote supply unit. The controller operates the pump to control the additive flow rate based on signals provided by sensors measuring a parameter of interest. A one mode system includes a surface facility for supporting the subsea chemical injection and monitoring activities. In one embodiment, the surface facility is an offshore rig that provides power and has a chemical supply that provides additives to one or more injection units. In another embodiment, the surface facility includes a relatively stationary buoy and a mobile service vessel. When needed, the service vessel transfers additives to the chemical injection units via the buoy.Type: GrantFiled: August 14, 2003Date of Patent: June 26, 2007Assignee: Baker Hughes IncorporatedInventors: Christopher Kempson Shaw, Cindy L. Crow, William Edward Aeschbacher, Jr., Sunder Ramachandran, Mitch C. Means, Paulo S. Tubel
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Patent number: 7231976Abstract: A method of treating a well consists of introducing into the wellbore a biodegradable fluid system containing a blend of lactic acid ester, such as ethyl lactate, and a fatty acid ester, such as methyl soyate. The fluid system may be further in the form of a microemulsion that is formed by combining a blend with one or more emulsifiers, an alcohol, and water. The fluid system may be used in displacement, well remediation and stimulation as well as additional, alternative applications such as the cleaning of surface and/or downhole equipment.Type: GrantFiled: November 10, 2004Date of Patent: June 19, 2007Assignee: BJ Services CompanyInventors: Sandra L. Berry, Kay E. Cawiezel
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Patent number: 7216712Abstract: Hydrocarbon solids are removed from an oil well by feeding into the oil well a composition comprising at least 40 vol. % dense phase carbon dioxide and at least 30 vol. % of a C1–C3 alkanol component and optionally one or more surfactants, under a pressure of 300 to 10,000 psia and a temperature of 90° F. to 120° F., holding the composition in the well to solubilize hydrocarbon solids, and then removing from the well a liquid composition comprising solubilized hydrocarbon solids and alkanol.Type: GrantFiled: December 10, 2003Date of Patent: May 15, 2007Assignee: Praxair Technology, Inc.Inventor: Dan Dalton
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Patent number: 7213650Abstract: A system and method for stimulating a formation surrounding a well and vibrating a device for supporting a gravel pack in the well, according to which a build up of scale on the device is sensed and a corresponding signal is output. A driver is provided for driving a transducer coupled to the device for vibrating the device and removing scale from the device.Type: GrantFiled: November 6, 2003Date of Patent: May 8, 2007Assignee: Halliburton Energy Services, Inc.Inventors: Lyle V. Lehman, James R. Birchak, James S. Venditto, Diederik van Batenburg, Sau-Wai Wong, Frederick van de Bas, Jeroen J. Groenenboom
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Patent number: 7195070Abstract: A fluid conditioning system designed to be installed between the well perforation and the intake of a pump used to effect artificial lift is used to filter and chemically treat production fluids. The fluid conditioning system is an apparatus that provides scale inhibitors and/or other chemical treatments into the production stream. In some embodiments, the fluid conditioning system may be a part of the production stream filter wherein the filtering material is comprised of a porous medium that contains and supports the treatment chemical. In other embodiments, the chemical treatment may be accomplished by the gradual dissolution of a solid phase chemical. The treating chemical may be recharged or replenished by various downhole reservoirs or feeding means. In yet other embodiments, the treating chemical may be replenished from the surface by means of a capillary tube.Type: GrantFiled: July 15, 2004Date of Patent: March 27, 2007Assignee: Weatherford/Lamb, Inc.Inventors: Richard J. Delaloye, Steven C. Kennedy, Jeffrey Bode, Jeffrey Lembcke, Kevin W. Smith, Benjamin R. Luscomb, III, Jack Curr
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Patent number: 7196040Abstract: A material and a device for releasing chemicals in a fluid environment is disclosed, and a method for releasing substances into downhole fluid environments. The invention also relates to materials for sand control and hydraulic fracturing. The substance release device typically comprises a polymeric material for releasing a substance into a downhole fluid environment in a well, and in preferred embodiments the material comprises a spherical, plastic chemical release capsule which is hard, permeable and may encapsulate a range of solids and/or liquids for subsequent release. These solids or liquids can include inhibitors such as scale inhibitors and other oilfield production chemicals for release into the wellbore of an oil or gas producing well or a water injection well.Type: GrantFiled: June 6, 2001Date of Patent: March 27, 2007Assignee: T R Oil Services LimitedInventors: Stephen Mark Heath, Hugh Malcolm Bourne
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Patent number: 7165621Abstract: A method and apparatus for producing gas from a hydrate formation includes the use of at least one wellbore which penetrates the hydrate formation and further extends into an aquifer below the hydrate formation. The aquifer provides relatively warm water which may be produced up and into the hydrate formation thereby causing the release of gas from the hydrate. Suitable flow control and monitoring equipment may be included to control the flow of water produced from the aquifer and gas produced from the hydrate formation.Type: GrantFiled: August 10, 2004Date of Patent: January 23, 2007Assignee: Schlumberger Technology Corp.Inventors: Joseph A. Ayoub, Stuart I. Jardine, Terizhandur S. Ramakrishnan
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Patent number: 7156177Abstract: A scale dissolver fluid for dissolving scale in a subterranean hydrocarbon-bearing formation comprises an effective amount of a scale dissolver formulation and an effective amount of a surfactant for controlling the viscosity of the fluid. In use, formation hydrocarbons act on the surfactant to reduce the viscosity of the fluid so that the fluid selectively invades a hydrocarbon-bearing zone of the formation.Type: GrantFiled: July 23, 2001Date of Patent: January 2, 2007Assignee: Schlumberger Technology CorporationInventors: Timothy Gareth John Jones, Gary John Tustin, Philip Fletcher, Jesse Ching-Wang Lee
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Patent number: 7134496Abstract: Single phase microemulsions improve the removal of filter cakes formed during drilling with invert emulsions. The single phase microemulsion removes oil and solids from the deposited filter cake. Optionally, an acid capable of solubilizing the filter cake bridging particles may also be used with the microemulsion. In one non-limiting embodiment the acid may be a polyamino carboxylic acid. Skin damage removal from internal and external filter cake deposition can be reduced.Type: GrantFiled: September 2, 2005Date of Patent: November 14, 2006Assignee: Baker Hughes IncorporatedInventors: Thomas A. Jones, David E. Clark, Lirio Quintero, Bruce Rae Ewen
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Patent number: 7081438Abstract: Fluids useful in oil well drilling operations are described. The fluids comprise standard viscosifying and fluid loss control additives along with phosphonates or phosphate esters of organic ligands. The addition of the phosphonates or phosphate esters at effective concentrations prevents the adherence of heavy oil and heavy oil laden drill cuttings to drill pipe strings and well bore casings.Type: GrantFiled: August 13, 2003Date of Patent: July 25, 2006Assignee: Brine -Add Fluids Ltd.Inventor: David P. Horton
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Patent number: 7059414Abstract: A method of stimulating subterranean formations in oil and gas wells using a high pH buffered acid system. The method may be used to treat sandstone formations wherein the pH buffered acid system is used as the preflush or overflush or both. The method consists of introducing into the well a hydrofluoric acid containing sandstone acidizing solution either prior to or subsequent to introduction of the pH buffered acid system. The pH buffered acid system may further be used in the treatment of carbonate reservoirs. The pH of the buffered acid solution is substantially equivalent to that of the pH of the acidizing solution. The buffered acid solution is void of either hydrofluoric acid or hydrofluoric acid precursors.Type: GrantFiled: July 22, 2003Date of Patent: June 13, 2006Assignee: BJ Services CompanyInventors: Philip James Rae, Gino Di Lullo Arias, Atikah Bte Ahmad, Leonard J. Kalfayan
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Patent number: 7036596Abstract: A method and apparatus for heating a portion of a subsea structure is provided. The method includes pumping a fluid through a length of tubing such that the temperature of the fluid increases. The temperature increase of the fluid is created by friction in the tubing, and may be also be created by at least one pressure reducing device such as an orifice, pressure reducing valve, or relief valve. A subsea structure may be heated by transferring heat from fluid circulating in a closed loop configuration or by direct application of fluid to the subsea structure using a nozzle. A remotely operated vehicle may be utilized to transport some or all of the equipment necessary, including pumps, tubing, heat exchangers, nozzles and tanks. The remotely operated vehicle provides power to the pumps used for circulating fluid through the tubing.Type: GrantFiled: September 22, 2004Date of Patent: May 2, 2006Assignee: Sonsub Inc.Inventor: Billy Joe Reid
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Patent number: 7004258Abstract: An apparatus for increasing oil and gas recovery includes a delivery mechanism for automatically introducing a flow enhancing substance into a plunger of an oil or gas well and method.Type: GrantFiled: January 8, 2004Date of Patent: February 28, 2006Inventor: Sam Farris
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Patent number: 6988552Abstract: A method to clean the wellbore and the near wellbore formation adjacent to the wellbore of the gas bearing formation adjacent to the production zone of the wellbore. The method includes the steps of injecting a treatment liquid containing from 84.5 to 100% of liquid carbon dioxide, 0 to 15% of an alcohol, and 0 to 0.5% of a surfactant into the well in a predetermined quantity and maintaining the pressure of the treatment liquid in the near wellbore formation of the gas bearing formation below the fracturing pressure of the formation, releasing the pressure on the wellbore and allowing the liquid CO2 to vaporize and other materials to blow out of the well.Type: GrantFiled: June 19, 2003Date of Patent: January 24, 2006Assignee: ConocoPhillips CompanyInventors: Dennis Ray Wilson, Thomas A. Bell, Jr.
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Patent number: 6978838Abstract: A method is given for completing an interval of an open-hole injection well penetrating a subterranean formation when the interface between the wellbore and the formation includes a zone invaded by a filter cake that includes bridging materials and other embedded solid materials. The method includes the steps of injecting a clean-up fluid and contacting it with the filtercake for a period of time sufficient to loosen some of the other solids embedded in the filter cake; removing the loosened solids by a high-rate displacement fluid containing suspending additives; and then injecting a dissolving fluid containing a diverter and an effective amount of a salt or acid capable of dissolving the bridging material.Type: GrantFiled: March 25, 2003Date of Patent: December 27, 2005Assignee: Schlumberger Technology CorporationInventors: Mehmet Parlar, Mark Brady, Liz Morris
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Patent number: 6978843Abstract: A well configuration and method of increasing production from a hydrocarbon well having pre-existing production tube. A composite velocity string having an outer diameter smaller than the inner diameter of the production tube is installed in the production tube so that an annular gap is formed between the outer surface of the velocity string and the inner surface of the production tube. Production from the well is increased because the coefficient of fluid flow friction through the composite velocity string, and the amount of heat loss through the composite velocity string, are reduced compared to a steel velocity string. Installation efficiency is also increased because the composite velocity string is much lighter than a steel velocity string.Type: GrantFiled: May 1, 2003Date of Patent: December 27, 2005Assignee: Polyflow, Inc.Inventors: Robert Alan Gleim, Changhui Zhu
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Patent number: 6913081Abstract: A combined scale inhibitor treatment and water control treatment requires fewer steps than the sum of each treatment procedure practiced separately. The control of water production simultaneously further reduces the amount of scale formed. Conventional water control chemicals and scale inhibitors of a wide variety of types can still be employed to advantage, and the same equipment may be used as employed for the treatments implemented separately.Type: GrantFiled: February 6, 2003Date of Patent: July 5, 2005Assignee: Baker Hughes IncorporatedInventors: Peter Powell, Michael A. Singleton, Kenneth S. Sorbie
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Patent number: 6886635Abstract: A method for removing filter cake from a subterranean borehole comprising drilling the borehole with a drilling fluid that includes additives to form a filter cake having an oxidation-degradable component, preferably a polysaccharide. The filter cake is contacted with a clear brine containing a mixture of a persulfate salt in a variable density brine to degrade the polymers within the filter cake. The persulfate mixture breaks down the filter cake in well bores having temperatures ranging from about 65° F. to 165° F. Concentration of the persulfate sets the pace of the reaction.Type: GrantFiled: August 28, 2002Date of Patent: May 3, 2005Assignee: Tetra Technologies, Inc.Inventors: Mohammad Hossaini, Joe Murphey, Tom S. Carter, Jeffrey S. McKennis
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Publication number: 20040256104Abstract: A method to clean the wellbore and the near wellbore formation adjacent to the wellbore of the gas bearing formation adjacent to the production zone of the wellbore. The method includes the steps of injecting a treatment liquid containing from 84.5 to 100% of liquid carbon dioxide, 0 to 15% of an alcohol, and 0 to 0.5% of a surfactant into the well in a predetermined quantity and maintaining the pressure of the treatment liquid in the near wellbore formation of the gas bearing formation below the fracturing pressure of the formation, releasing the pressure on the wellbore and allowing the liquid CO2 to vaporize and other materials to blow out of the well.Type: ApplicationFiled: June 19, 2003Publication date: December 23, 2004Applicant: CONOCOPHILLIPS COMPANYInventors: Dennis Ray Wilson, Thomas A. Bell
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Patent number: 6832655Abstract: A method for cleaning a plugged gravel pack in a subterranean wellbore is provided. The method comprises the steps of using a pressure pulsating jet and a tangential vortex to deliver a pressure pulsating treatment fluid into the gravel pack wherein soluble plugging materials in the gravel pack are dissolved by the treatment fluid and insoluble plugging materials are moved through the gravel pack and circulated out of the wellbore. The treatment fluid is driven into the gravel pack to dissolve soluble fines and displace insoluble fines from the interstitial pore spaces of the gravel pack.Type: GrantFiled: September 27, 2002Date of Patent: December 21, 2004Assignee: BJ Services CompanyInventors: John Ravensbergen, John Gordon Misselbrook, Lance Nigel Portman
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Patent number: 6828531Abstract: Method and apparatus for melting a material and squeezing the melted material through casing perforations into a fault within the cement or formation of an oil or gas well. A heating tool carries solid material which is melted at depth within the well and adjacent to the casing perforations. The liquefied material is forced through the perforations and into the formation or the well cement. When the material cools and solidifies, the faults become sealed.Type: GrantFiled: September 19, 2002Date of Patent: December 7, 2004Inventor: Homer L. Spencer
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Publication number: 20040226718Abstract: An oil well capsule to reduce the paraffin and asphaltene which accumulate on the walls of the pipes which are used to bring the oil up from underground deposits, and a method of using said oil well capsule. An oil well capsule having a shell encapsulating a chemically active mass wherein said chemically active mass consists essentially of alkaline or alkaline earth metal.Type: ApplicationFiled: January 26, 2004Publication date: November 18, 2004Inventors: Gennady V. Katzyn, Boris E. Kogal
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Patent number: 6805198Abstract: Dicarboxylic acids are useful in acidizing subterranean formations to improve their permeability, particularly at elevated temperature, e.g. between about 200° F. (92° C.) and about 400° F. (204° C.). Particularly suitable dicarboxylic acids include, but are not necessarily limited to, succinic acid, glutaric acid, adipic acid, and mixtures thereof.Type: GrantFiled: August 19, 2002Date of Patent: October 19, 2004Assignee: Baker Hughes IncorporatedInventors: Tianping Huang, Paul M. McElfresh, Allen D. Gabrysch
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Publication number: 20040194961Abstract: The present invention provides methods of stabilizing subterranean formations and methods of reducing the production of particulates from subterranean formations, which are useful in conjunction with subterranean formations surrounding wellbores and fractures. The methods comprise the steps of applying to a subterranean formation a combination aqueous liquid and surfactant preflush solution, an integrated consolidation fluid and an afterflush fluid and then waiting a chosen period of time.Type: ApplicationFiled: April 7, 2003Publication date: October 7, 2004Inventors: Philip D. Nguyen, Johnny A. Barton, O. Marlene Isenberg
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Publication number: 20040154799Abstract: A combined scale inhibitor treatment and water control treatment is described that requires fewer steps than the sum of each treatment procedure practiced separately. The control of water production simultaneously further reduces the amount of scale formed. Conventional water control chemicals and scale inhibitors of a wide variety of types can still be employed to advantage, and the same equipment may be used as employed for the treatments implemented separately.Type: ApplicationFiled: February 6, 2003Publication date: August 12, 2004Inventors: Peter Powell, Michael A. Singleton, Kenneth S. Sorbie
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Patent number: 6769488Abstract: A well treatment tool is installed along the sucker rod string of a well, within the surrounding production tube string. The tool provides for the distribution of a treatment fluid (solvent, etc.) within the fluid being pumped or flowing from the well. The tool receives treatment fluid through the hollow sucker rod string, and distributes the fluid through a valve which is set at a predetermined pressure. When the treatment fluid pumped down the sucker rod string from the surface exceeds the predetermined opening pressure of the valve, the treatment fluid is distributed into the production tube string through one or more passages in the tool. The present tool may be used simultaneously with well production, with fluid (oil, etc.) rising up the production tube string, carrying the treatment fluid therewith. The treatment fluid is thus distributed throughout the local fluid processing system, including pipelines from the well, any initial treatment operations, and any storage tanks.Type: GrantFiled: February 18, 2003Date of Patent: August 3, 2004Inventor: Roger Stone
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Patent number: 6733668Abstract: An apparatus for magnetically treating fluids produced from a hydrocarbon well includes a hydrocarbon section and a reactor section. The hydrocarbon section is designed to treat crude oil to inhibit the deposition of paraffins, asphaltines, and the like. The reactor section is designed to treat aqueous fluids to inhibit the deposition of mineral scale, and in particular the deposition of barium sulfate. The magnets in the two sections are arranged in a linear, co-axial relationship. Radial focusing magnets provided in the reactor section distort the magnetic field and inhibit dissolved minerals from forming scale on the production tubing. The apparatus is effective at preventing fouling by barium sulfate deposition.Type: GrantFiled: September 23, 2002Date of Patent: May 11, 2004Assignee: Omni-Tech 2000 Inc.Inventors: Dwight Pedersen, Clark Humphreys
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Publication number: 20040074646Abstract: Gelatin capsules containing oil field chemicals, preferably weighted with a heavy metal compound, are made more stable under certain conditions by the incorporation of a strong chelating agent. The microcapsules can provide an extended treatment period since many materials that would damage the microcapsules are controlled by the chelating agent.Type: ApplicationFiled: October 27, 2003Publication date: April 22, 2004Inventors: Hans Kristian Kotlar, Olav Martin Selle, Oddvar Arnfinn Aune, Lars Kilaas, Anne Dalager Dyrli
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Publication number: 20040060702Abstract: The invention provides a method for the treatment of a hydrocarbon well which method comprises administering down said well polymeric particles impregnated with a well treatment chemical or precursor or generator thereof (e.g. a scale inhibitor), said particles having a pore volume of at least 20%, and being prepared by a process which comprises preparing in a first step an aqueous dispersion of polymer particles containing from 0.Type: ApplicationFiled: October 27, 2003Publication date: April 1, 2004Inventors: Hans Kristian Kotlar, Olav Martin Selle, Oddvar Arnfinn Aune, Lars Kilaas, Anne Dalagaer Dyrli
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Patent number: 6705396Abstract: A method and apparatus for producing fluid cavitation is provided. For a given channel cross-section of a pressure line, the flow is accelerated so as to reach a speed at which Re>Recr, where Re is the Reynolds number and Recr is the critical Reynolds number; the flow is then interrupted for a time less than half of the phase of the hydraulic shock. The device for cavitation of fluid flow is mounted in the channel of a pressure line and includes a cavitator which has the form of a working body placed in the casing and can move radially inside the line and, to a limited extent, along the axis of the line. The maximum cross-section surface of the working body in a plane perpendicular co the axis of the line is more than 0.8 of the passage of the line but not equal to it.Type: GrantFiled: April 2, 2002Date of Patent: March 16, 2004Assignee: BIP Technology LtdInventors: Vladimir Ivanovich Ivannikov, Ivan Vladimirovich Ivannikov
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Patent number: 6706668Abstract: An acidizing composition and a method of acidizing a hydrocarbon bearing subterranean formation in the presence of ferric ions are provided. The acidizing composition includes a strong mineral acid solution, an electron donor agent, a primary electron transfer agent and a secondary electron transfer agent. The primary electron transfer agent is a source of rhenium ions. The secondary electron transfer agent is a source of iodide ion or iodine. The electron donor agent and primary and secondary electron transfer agents function together to reduce ferric ion present in the mineral acid solution to ferrous ion which in turn prevents ferric hydroxide and/or free sulfur from precipitating out of the solution and reduces the formation of sludge in crude oil in the formation. The particular electron transfer agents used in connection with the invention function with virtually all known electron donor agents.Type: GrantFiled: May 3, 2002Date of Patent: March 16, 2004Assignee: Halliburton Energy Services, Inc.Inventor: Michael M. Brezinski
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Patent number: 6702022Abstract: An oil well capsule to reduce the paraffin and asphaltene which accumulate on the walls of the pipes which are used to bring the oil up from underground deposits, and a method of using the oil well capsule. An oil well capsule having a shell encapsulating a chemically active mass wherein the chemically active mass consists essentially of alkaline or alkaline earth metal.Type: GrantFiled: June 20, 2001Date of Patent: March 9, 2004Inventors: Gennady V. Kattsyn, Boris E. Kogai
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Publication number: 20040011527Abstract: A scale dissolver fluid for dissolving scale in a subterranean hydrocarbon-bearing formation comprises an effective amount of a scale dissolver formulation and an effective amount of a surfactant for controlling the viscosity of the fluid. In use, formation hydrocarbons act on the surfactant to reduce the viscosity of the fluid so that the fluid selectively invades a hydrocarbon-bearing zone of the formation.Type: ApplicationFiled: July 31, 2003Publication date: January 22, 2004Inventors: Timothy Gareth John Jones, Gary John Tustin, Philip Fletcher, Jesse Ching-Wang Lee
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Patent number: 6664522Abstract: Apparatus and method for melting material in any one or a plurality of casings of an oil or gas well and thereby sealing the annulus to prevent gas leakage and the like. The material is positioned within any of the annuluses between the production and surface casing of the well and above the well cement between the casings of interest. A heating tool is lowered into position and provides the necessary heat to melt the material. The heating tool may be removed following the sealing of the annulus.Type: GrantFiled: June 20, 2002Date of Patent: December 16, 2003Inventor: Homer L. Spencer
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Publication number: 20030132224Abstract: Method and apparatus for melting a material and squeezing the melted material through casing perforations into a fault within the cement or formation of an oil or gas well. A heating tool carries solid material which is melted at depth within the well and adjacent to the casing perforations. The liquefied material is forced through the perforations and into the formation or the well cement. When the material cools and solidifies, the faults become sealed.Type: ApplicationFiled: September 19, 2002Publication date: July 17, 2003Applicant: CANITRON SYSTEMS, INC.Inventor: Homer L. Spencer
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Publication number: 20030127228Abstract: A well treatment tool is installed along the sucker rod string of a well, within the surrounding production tube string. The tool provides for the distribution of a treatment fluid (solvent, etc.) within the fluid being pumped or flowing from the well. The tool receives treatment fluid through the hollow sucker rod string, and distributes the fluid through a valve which is set at a predetermined pressure. When the treatment fluid pumped down the sucker rod string from the surface exceeds the predetermined opening pressure of the valve, the treatment fluid is distributed into the production tube string through one or more passages in the tool. The present tool may be used simultaneously with well production, with fluid (oil, etc.) rising up the production tube string, carrying the treatment fluid therewith. The treatment fluid is thus distributed throughout the local fluid processing system, including pipelines from the well, any initial treatment operations, and any storage tanks.Type: ApplicationFiled: February 18, 2003Publication date: July 10, 2003Inventor: Roger Stone
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Publication number: 20030106687Abstract: An electric submersible pump has one or more components coated with a biocide-incorporated coating for the purpose of controlling the activity of bacteria. The portions exposed to well fluid are coated for inhibiting bacteria from growing. Both centrifugal and progressing cavity pumps are applicable.Type: ApplicationFiled: December 10, 2001Publication date: June 12, 2003Inventor: Dan L. Adams