Polysaccharide Is Cellulose Or Derivative Thereof Patents (Class 507/214)
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Publication number: 20100197527Abstract: Treatments fluids relating to the hydrolysis of water-hydrolysable materials are provided. In one embodiment, provided is a treatment fluid that comprises an aqueous liquid, a water-miscible solvent, and a water-hydrolysable material. Also provided is a hydrolysis retarder composition that comprises an aqueous liquid and a water-miscible solvent.Type: ApplicationFiled: April 14, 2010Publication date: August 5, 2010Inventors: Bradley L. Todd, Karen Savery
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Publication number: 20100184630Abstract: Embodiments of this invention relate to compositions and methods of treating a subterranean formation penetrated by a well bore including introducing a Theological polymer into a subterranean formation, introducing a partitioning agent into a subterranean formation and forming a heterogeneous mixture comprising a dispersed Theological polymer-rich phase and a partitioning agent-rich phase, wherein the viscosity of the mixture is lower than the viscosity of the mixture when no partitioning agent is present.Type: ApplicationFiled: January 16, 2009Publication date: July 22, 2010Inventors: Philip F. Sullivan, Gary John Tustin, Mark Turner, Stephania Poulis Cruz
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Patent number: 7759292Abstract: The present invention relates to subterranean treatment fluids, and more particularly, the present invention relates to subterranean treatment fluids comprising relative permeability modifiers and methods for using such subterranean treatment fluids in subterranean operations to reduce the production of water from and stimulate hydrocarbon production in a subterranean formation. In certain embodiments, the methods of the present invention generally comprise the steps of providing a permeability-modifying aqueous treatment fluid comprising a relative permeability modifier and contacting a subterranean formation with the permeability-modifying aqueous treatment fluid. Optionally, the permeability-modifying aqueous treatment fluid may be injected in the subterranean formation at a pressure sufficient to create or enhance at least one fracture therein. In another embodiment, the methods of the present invention further comprise the step of injecting an acidizing treatment into the subterranean formation.Type: GrantFiled: January 20, 2004Date of Patent: July 20, 2010Assignee: Halliburton Energy Services, Inc.Inventors: Larry S. Eoff, Eldon D. Dalrymple, B. Raghava Reddy
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Publication number: 20100179076Abstract: Methods and apparatus for forming a fluid for use within in a subterranean formation comprising combining a partitioning agent, crosslinkable polymer, and crosslinker into a fluid, wherein more than 50 percent of the crosslinkable polymer crosslinks and less than 10 percent of the partitioning agent crosslinks, and introducing the fluid into the subterranean formation. Methods and apparatus of forming a fluid for use within in a subterranean formation comprising combining a partitioning agent, crosslinkable polymer, and crosslinker into a fluid, wherein a critical polymer concentration for crosslinking the crosslinkable polymer is lower than if the partitioning agent were not in the fluid, and introducing the fluid into the subterranean formation.Type: ApplicationFiled: January 15, 2009Publication date: July 15, 2010Inventors: Philip F. Sullivan, Gary John Tustin, Robert Seth Hartshorne, J. Ernest Brown
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Patent number: 7741247Abstract: A region of a borehole with one or more openings to be sealed off, such as one or more fractures, voids, and or pores, may or may not be sealed off around a tubular string with a borehole seal such as a packer or plug. A carrying fluid may be utilized to transport a filtration material into the opening to create a bridge, which at least partially seals the opening, but still provides a flow path that permits fluid flow therethrough. A solid material and/or settable material may then utilize the fluid flow subsequently or be simultaneously spotted with or behind the filtration material to thereby form compositions which effectively seals off the flow path into the one or more openings.Type: GrantFiled: February 7, 2007Date of Patent: June 22, 2010Inventor: Ling Wang
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Patent number: 7732382Abstract: A cross-linking composition comprises (a) an aqueous liquid, (b) a pH buffer, (c) a cross-linkable organic polymer, (d) a cross-linking agent which comprises an organic titanate, an organic zirconate, or combinations thereof, and (e) a delay agent which is a hydroxyalkylaminocarboxylic acid. The composition provides flexibility in rate of cross-linking and can be used over a wide range of pH. Further disclosed are methods to use the composition in oil field applications for hydraulic fracturing and plugging of permeable zones and leaks in subterranean formations.Type: GrantFiled: February 14, 2006Date of Patent: June 8, 2010Assignee: E.I. du Pont de Nemours and CompanyInventor: Donald Edward Putzig
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Patent number: 7732384Abstract: A process is provided to prepare solid borozirconate and solid borotitanate cross-linkers, which comprises contacting zirconium or titanium complex with alkanolamine at particular mole ratios of boron, zirconium or titanium and alkanolamine. Use of the cross-linkers in compositions for oil field applications such as hydraulic fracturing and plugging of permeable zones are also disclosed.Type: GrantFiled: December 21, 2007Date of Patent: June 8, 2010Assignee: E.I. du Pont de Nemours and CompanyInventors: Donald Edward Putzig, Peter Jernakoff
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Publication number: 20100113309Abstract: This invention relates to methods for reducing the viscosity of hydrocarbon liquids encountered in petroleum operations. The method includes forming a low viscosity emulsion by contacting hydrocarbon liquids with an effective amount of a water-soluble polymer having pendant methyl ether groups.Type: ApplicationFiled: November 6, 2008Publication date: May 6, 2010Inventor: Duy T. Nguyen
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Publication number: 20100081586Abstract: The disclosed compositions and methods utilize hydrophilic polymers modified by the incorporation of one or more hydrophilic side groups. The polymers may exhibit physical association in solution at a specific temperature so as to provide a significant increase in viscosity at the specific temperature. The viscosity of such systems is substantially increased by the further inclusion of one or more hydrophilic components that may exhibit physical association in solution at one or more temperature trigger points and also associate with the one or more hydrophilic polymers modified by the incorporation of one or more hydrophilic side groups.Type: ApplicationFiled: September 23, 2009Publication date: April 1, 2010Applicant: BP CORPORATION NORTH AMERICA INC.Inventors: Philip S. Smith, Dale L. Handlin, JR.
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Publication number: 20100075872Abstract: The present invention relates to methods and compositions for carrier fluids comprising water-absorbent fibers. One embodiment of the present invention provides a method of treating a portion of a subterranean formation, comprising providing a slurry wherein the slurry comprises a servicing fluid, particulates, and a degradable, water-absorbent material wherein the degradable, water-absorbent material acts to help keep the particulates from settling out of the slurry; and, introducing the slurry into the portion of the subterranean formation. Another embodiment of the present invention provides a slurry suitable for use in subterranean operations comprising a servicing fluid, particulates, and a degradable, water-absorbent material wherein the degradable, water-absorbent material acts to help keep the particulates from settling out of the slurry.Type: ApplicationFiled: November 30, 2009Publication date: March 25, 2010Inventor: Philip D. Nguyen
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Patent number: 7683011Abstract: A process to prepare a stable solution of a borozirconate complex is disclosed and use of the solution in oil field applications such as hydraulic fracturing and plugging of permeable zones. The process comprises contacting zirconium complex with a first alkanolamine, then glycerol and water, then with a solution of a boron compound and a second alkanolamine. The solution is particularly suitable for use in a cross-linking composition at temperatures of 275° F. (135° C.) and higher in the subterranean formation.Type: GrantFiled: December 12, 2007Date of Patent: March 23, 2010Inventor: Donald Edward Putzig
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Publication number: 20100056403Abstract: Methods of treating a subterranean formation are disclosed, using a fluid including an essentially metal-free organic crosslinker selected from amines, diamines, poly amines, polyamino polymers, alcohols, polyols, polyhydroxy polymers, hydroxyl amines, peptides and proteins, combined with a polysaccharide or cellulosic material having oxidized functional groups. The fluid is then introduced into a wellbore penetrating the formation to contact the formation. The polysaccharide or cellulosic material may have aldehyde groups as one example of an oxidized group, or any other suitable oxidized functional group. The polysaccharide or the cellulosic material may be oxidized using at least one of an enzymes, oxidizers, photooxidation, bacteria, catalyst, or other suitable technique. The fluid may also further include an inorganic crosslinker.Type: ApplicationFiled: August 11, 2009Publication date: March 4, 2010Inventors: Carlos Abad, Mathew M. Samuel, Kevin W. England
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Publication number: 20100048429Abstract: Treating fluid compositions for use in hydrocarbon recovery operations from subterranean formations are described, as well as methods for their preparation and use. In particular, treating fluid compositions are described which comprise a liquid, a crosslinkable organic polymer material that is at least partially soluble in the liquid, a crosslinking agent that is capable of increasing the viscosity of the treating fluid by crosslinking the organic polymer material in the liquid, and a crosslinking modifier additive which can delay or accelerate the crosslinking of the treating fluid composition. Such compositions may be used in a variety of hydrocarbon recovery operations including fracturing operations, drilling operations, gravel packing operations, water control operations, and the like.Type: ApplicationFiled: February 27, 2009Publication date: February 25, 2010Applicant: TEXAS UNITED CHEMICAL COMPANY, LLCInventors: James W. Dobson, JR., Shauna L. Hayden, Kimberly A. Pierce
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Publication number: 20100044049Abstract: The invention describes improved environmentally friendly, non-toxic, CBM friendly, green fracturing compositions, methods of preparing fracturing compositions and methods of use. Importantly, the subject invention overcomes problems in the use of water-based mists as an effective fracturing composition particularly having regard to the ability of a mist to transport an effective volume of proppant into a formation. As a result, the subject technologies provide an effective economic solution to using high ratio gas fracturing compositions that can be produced in a continuous (i.e. non-batch) process without the attendant capital and operating costs of current pure gas fracturing equipment.Type: ApplicationFiled: July 27, 2009Publication date: February 25, 2010Applicant: Century Oilfield Services Inc.Inventors: Timothy Tyler Leshchyshyn, Peter William Beaton, Thomas Michael Coolen
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Publication number: 20100044048Abstract: The invention describes improved environmentally friendly, non-toxic, green fracturing compositions, methods of preparing fracturing compositions and methods of use. Importantly, the subject invention overcomes problems in the use of water-based mists as an effective fracturing composition particularly having regard to the ability of a mist to transport an effective volume of proppant into a formation. As a result, the subject technologies provide an effective economic solution to using high ratio gas fracturing compositions that can be produced in a continuous (i.e. non-batch) process without the attendant capital and operating costs of current pure gas fracturing equipment.Type: ApplicationFiled: July 22, 2009Publication date: February 25, 2010Applicant: Century Oilfield Services Inc.Inventors: Timothy Tyler Leshchyshyn, Peter William Beaton, Thomas Michael Coolen
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Publication number: 20100016182Abstract: The present invention relates to the use of chalcogen heterocyclic electron donating compounds as thermal decomposition reduction additives for gels used in well treatment fluids such as drilling fluids, fracturing fluids, and well completion and workover fluids.Type: ApplicationFiled: July 20, 2009Publication date: January 21, 2010Inventors: D. V. Satyanarayana Gupta, Paul S. Carman
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Publication number: 20090291862Abstract: A drilling fluid includes a base fluid and a circulation loss reducing additive package having a polysaccharide, a cellulose derivative and a pH controlling component.Type: ApplicationFiled: August 5, 2009Publication date: November 26, 2009Applicant: INTEVEP, S.A.Inventors: Sarkis Kakadjian, Jacques Reinaldo Gabay, Gerardo Alonso Sanchez
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Patent number: 7622427Abstract: A completion and workover fluid composition comprising, water and at least one rheology modifier and/or fluid loss control agent, and at least one other ingredient selected from the group consisting of inorganic salts, shale inhibitors, corrosion inhibitor, biocide, defoamers and finely divided solids particles (e.g., bentonite, attapulgite, sepiolite, calcium carbonate, etc.), depending upon the desired attributes, wherein the rheology modifier and/or the fluid loss control agent is an ethoxylated raw cotton linters or a modified ethoxylated raw cotton linters. The ethoxylated raw cotton linters provides comparable or better rheology and viscosity properties compared to high molecular weight commercial HECs made from purified cotton linters. These ethoxylated raw cotton linters derivatives are suitable for applications in oil-well servicing fluids, particularly to enhance functional properties of completion and workover fluids used during oil-well drilling operations.Type: GrantFiled: February 21, 2007Date of Patent: November 24, 2009Assignee: Hercules IncorporatedInventors: Arjun C. Sau, Mohand Melbouci
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Patent number: 7612021Abstract: Disclosed embodiments relate to compositions and methods for using a composite particulate comprising a cellulosic fiber and a filler as a lost-circulation material. An example of a method of controlling lost circulation in a subterranean method, comprises contacting a subterranean formation with a fluid comprising a base fluid and a lost circulation material, wherein the lost circulation material comprises a composite particulate, and wherein the composite particulate comprises a cellulosic fiber and a filler. An example method of cementing comprises introducing a cement composition into a well bore penetrating a subterranean formation, wherein the cement compositions comprises a cement, water, and a lost-circulation material, and wherein the lost-circulation material comprises a lost-circulation material, and wherein the lost-circulation material comprises a cellulosic fiber and a filler. Example compositions include lost-circulation materials, treatment fluids and cement compositions.Type: GrantFiled: August 24, 2007Date of Patent: November 3, 2009Assignee: Halliburton Energy Services, Inc.Inventors: Jiten Chatterji, Bobby King, Darrell C. Brenneis
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Patent number: 7595283Abstract: The present invention relates to subterranean treatment fluids, and more particularly, the present invention relates to subterranean treatment fluids comprising relative permeability modifiers and methods for using such subterranean treatment fluids in subterranean operations to reduce the production of water from and stimulate hydrocarbon production in a subterranean formation. In certain embodiments, the methods of the present invention generally comprise the steps of providing a permeability-modifying aqueous treatment fluid comprising a relative permeability modifier and contacting a subterranean formation with the permeability-modifying aqueous treatment fluid. Optionally, the permeability-modifying aqueous treatment fluid may be injected in the subterranean formation at a pressure sufficient to create or enhance at least one fracture therein. In another embodiment, the relative permeability modifier may be provided by appropriate reaction in situ.Type: GrantFiled: June 20, 2006Date of Patent: September 29, 2009Assignee: Halliburton Energy Services, Inc.Inventors: Larry S. Eoff, Eldon D. Dalrymple, B. Raghava Reddy
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Patent number: 7589048Abstract: The present invention relates to subterranean treatment fluids, and more particularly, the present invention relates to subterranean treatment fluids comprising relative permeability modifiers and methods for using such subterranean treatment fluids in subterranean operations to reduce the production of water from and stimulate hydrocarbon production in a subterranean formation. In certain embodiments, the methods of the present invention generally comprise the steps of providing a permeability-modifying aqueous treatment fluid comprising a relative permeability modifier and contacting a subterranean formation with the permeability-modifying aqueous treatment fluid. Optionally, the permeability-modifying aqueous treatment fluid may be injected in the subterranean formation at a pressure sufficient to create or enhance at least one fracture therein. In another embodiment, the relative permeability modifier may be provided by appropriate reaction in situ.Type: GrantFiled: June 20, 2006Date of Patent: September 15, 2009Assignee: Halliburton Energy Services, Inc.Inventors: Larry S. Eoff, Eldon D. Dalrymple, B. Raghava Reddy
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Publication number: 20090221453Abstract: A treatment fluid composition for treating a subterranean formation is formed from an aqueous fluid, a hydratable polymer and a polymer breaking system. The polymer breaking system includes an oxidizing breaking agent and an activator capable of providing a bisulfite ion source. A method of treating a subterranean formation may also be performed by forming a treatment fluid comprising an aqueous hydrated polymer solution and a polymer breaking system. The polymer breaking system includes a breaking agent of an oxidizer and an activator capable of providing a bisulfite ion source. The treatment fluid is introduced into the formation.Type: ApplicationFiled: February 2, 2009Publication date: September 3, 2009Inventors: Sumitra Mukhopadhyay, Don Williamson, Richard D. Hutchins
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Publication number: 20090205824Abstract: Methods and apparatus for forming a fluid for use within in a subterranean formation including crosslinking a polymer along the surface of microspheres in a water-in-water emulsion and introducing the microspheres into the subterranean formation. Methods and apparatus for forming a fluid for use within in a subterranean formation including crosslinking a polymer along the surface of microspheres in a water in water emulsion, isolating the microspheres from the emulsion, and introducing the microspheres into the subterranean formation. Methods and apparatus for forming a fluid to treat a subterranean formation including introducing a crosslinkable polymer, partitioning agent, and crosslinker into a solvent, crosslinking the crosslinkable polymer, isolating beads of the crosslinkable polymer from the partitioning agent, introducing the beads into a fluid for treating a subterranean formation.Type: ApplicationFiled: January 14, 2009Publication date: August 20, 2009Inventors: Philip F. Sullivan, Gary John Tustin, Don Williamson, Hemant K. Ladva
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Publication number: 20090205818Abstract: A downwell packer assembly includes a tubular member and a packer element mounted on the tubular member. The packer element comprises a composition that includes a polymer. The packer element includes micropores (typically created via a blowing agent). When the packer element is exposed to a swelling fluid, such as water or hydrocarbon, the micropores can help to control and, in some instances, increase the rate of swelling. Such swelling enables the packer element to form a seal against the walls of the wellbore.Type: ApplicationFiled: February 6, 2009Publication date: August 20, 2009Inventors: Jurgen Klunge, Bernd Jansen, Andreas Lutz
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Publication number: 20090192056Abstract: Adding relatively low molecular weight water-soluble friction loss reduction polymers to an aqueous fluid gelled with a viscoelastic surfactant (VES) increases the critical generalized Reynold's number at which the Fanning friction factor increases and friction pressure starts to increase rapidly. The water-soluble polymeric friction loss reduction additives lower surface pumping pressure in VES-gelled fracturing fluids for a given pump rate, thus lowering hydraulic horsepower (HHP) requirements for pumping fluids downhole, e.g. for hydraulic fracturing or frac packing treatments of subterranean formations.Type: ApplicationFiled: April 6, 2009Publication date: July 30, 2009Applicant: Baker Hughes IncorporatedInventors: William Russell Wood, James B. Crews
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Patent number: 7563750Abstract: An exemplary method of the present invention for performing an injection operation includes providing a water-soluble relative permeability modifier, introducing the water-soluble relative permeability modifier into a subterranean formation; and injecting an aqueous injection fluid into the subterranean formation after introducing the water-soluble relative permeability modifier. An exemplary permeability-modifying injection fluid of the present invention contains water-soluble relative permeability modifier. The water-soluble relative permeability modifiers of the present invention include hydrophobically modified water-soluble polymers, hydrophilically modified water-soluble polymers, and water-soluble polymers without hydrophobic or hydrophilic modification.Type: GrantFiled: January 24, 2004Date of Patent: July 21, 2009Assignee: Halliburton Energy Services, Inc.Inventors: Larry S. Eoff, Eldon Dwyann Dalrymple, B. Raghava Reddy
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Publication number: 20090163387Abstract: This invention relates to compositions and methods of treating a subterranean formation penetrated by a well bore including providing a treatment composition comprising a rheological polymer, a partitioning agent, a charged polyelectrolyte, and a first liquid medium, forming a stabilized heterogeneous mixture comprising a dispersed rheological polymer-rich phase and a partitioning agent-rich phase, and injecting the treatment fluid into the well bore. The invention relates to methods and compositions for preparing a well treatment fluid, including mixing polyethylene glycol partitioning agent, a charged polyelectrolyte, a first aqueous medium, and one or more rheological polymers selected from the group consisting of guar, modified guar, cellulose, modified cellulose, heteropolysaccharide, heteropolysaccharide derivative, or polyacrylamide, to hydrate the one or more polymers and form a water-in-water emulsion, and mixing the water-in-water emulsion with a second aqueous medium to form a well treatment fluid.Type: ApplicationFiled: January 14, 2009Publication date: June 25, 2009Inventors: Philip F. Sullivan, Gary John Tustin, Christelle Vatry
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Publication number: 20090159280Abstract: A process is provided to prepare solid borozirconate and solid borotitanate cross-linkers, which comprises contacting zirconium or titanium complex with alkanolamine at particular mole ratios of boron, zirconium or titanium and alkanolamine. Use of the cross-linkers in compositions for oil field applications such as hydraulic fracturing and plugging of permeable zones are also disclosed.Type: ApplicationFiled: December 21, 2007Publication date: June 25, 2009Inventors: Donald Edward Putzig, Peter Jernakoff
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Patent number: 7541316Abstract: Aqueous wellbore treatment fluids having improved thermal stability are provided. The wellbore treatment fluids comprise at least one polysaccharide and an effective amount of at least one polyacrylamide to maintain its stability at a temperature greater than about 250° F. A formate compound is not required to achieve high-temperature stability in the fluid. Thus, the fluid is less expensive than conventional polymer-containing aqueous wellbore treatment fluids. The aqueous fluid may serve as, for example, a drilling fluid in the wellbore and thus may be circulated through the wellbore without being concerned that it could become unstable due to exposure to relatively high downhole temperatures.Type: GrantFiled: February 4, 2005Date of Patent: June 2, 2009Assignee: Halliburton Energy Services, Inc.Inventor: Jody L. Maresh
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Publication number: 20090133868Abstract: A low viscosity wellbore polymer fluid gelling system comprising an aqueous medium and a water-in-water emulsion comprising a plurality of polymers or oligomers, including at least one removable polymer or oligomer, and at least one gelling polymer or oligomer, wherein said fluid has a low viscosity when injected, and the gelling polymer forms a gel downhole which has a storage modulus of at least about 60 Pa after the removable polymer is removed from the fluid.Type: ApplicationFiled: November 26, 2007Publication date: May 28, 2009Inventors: Philip F. Sullivan, Gary John Tustin, Yenny Christanti, Gregory Kubala, Bruno Drochon, Trevor LLoyd Hughes
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Publication number: 20090111716Abstract: An aqueous fluid composition useful for the recovery of hydrocarbons from a subterranean formation, including a mixture of water, a water soluble polymer, an inorganic salt and at least one zwitterionic surfactant and methods of using same.Type: ApplicationFiled: October 17, 2008Publication date: April 30, 2009Applicant: Rhodia Inc.Inventors: Lawrence Alan HOUGH, Gilda Maria Lizarraga, Herve Adam, Jean-Christophe Castaing, Subramanian Kesavan
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Publication number: 20090067931Abstract: A gelled composition for pipeline, flowline, pipeline jumper or flowline jumper dewatering or preventing ingress of seawater into open pipeline systems or components during tie-in operations of jumpers or additional pipe, valving, manifolds, subsea pipeline architecture or flow conduits operations is disclosed, where the composition includes a concentrated metal formate solution and a hydratable polymer. The gelled formate compositions have improved dewatering properties with 100% or 360 pipe coverage. The gelled formate compositions have can also be reused by breaking and reformulation.Type: ApplicationFiled: July 3, 2008Publication date: March 12, 2009Applicant: WEATHERFORD/LAMB, INC.Inventors: Jack Curr, Brian Hallett, Alan Sweeney
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Publication number: 20090044942Abstract: Spherical porous and non-porous cellulose particulates for use in sand control as well as stimulation procedures, may be prepared by first dissolving cellulosic materials (such as fibrous cellulose, wood pulp linters, cotton balls and/or paper), in the substantial absence of water or a nitrogen-containing base, in an ionic liquid. The solution is then combined with a cellulose-insoluble liquid to render the spherical particulates. The surface of the cellulosic particulates may be treated with a coating or penetrating layer.Type: ApplicationFiled: August 13, 2008Publication date: February 19, 2009Inventor: D.V. Satyanarayana Gupta
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Publication number: 20090023614Abstract: This invention relates to compositions and methods for treating subterranean formations, in particular, oilfield stimulation compositions and methods using water-in-water polymer emulsions to uniformly dissolve a rheologically active polymer, such as a thickener or friction reducer, in the treatment fluid. The emulsions have a low viscosity and are easily pumped for mixing into a treatment fluid, where upon dilution with an aqueous medium, the polymer is easily hydrated without forming fish-eyes. The partitioning agent in the water-in-water emulsion does not generally affect the rheology of the treatment fluid. The invention also relates to further processing of the emulsion by wet grinding, high shear mixing and/or heating to enhance the hydration rate in the preparation of the well treatment fluid.Type: ApplicationFiled: July 2, 2008Publication date: January 22, 2009Inventors: Philip F. Sullivan, Gary John Tustin, Yenny Christanti, Gregory Kubala, Bruno Drochon, Yiyan Chen, Marie Noelle Dessinges, Paul R. Howard
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Publication number: 20080300149Abstract: A composition comprising a carboxylated, sulfonated polysaccharide and a wellbore servicing fluid. A wellbore servicing composition comprising a hydraulic cement and a carboxylated, sulfonated polysaccharide. A wellbore servicing composition comprising a polysaccharide having carboxylate and sulfonate groups.Type: ApplicationFiled: May 30, 2007Publication date: December 4, 2008Applicant: Halliburton Energy Services, Inc.Inventors: B. Raghava Reddy, Anindya Ghosh, Russell M. Fitzgerald
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Publication number: 20080281000Abstract: Novel cross-linked gels comprised of alkoxyetheramides grafted to polysaccharides that have superior viscosity properties have been made. By controlling the chain length of the alkoxyetheramides and the hydrophobic nature of the gel, these materials are ideal for many uses such as in hydraulic fracturing of oil-bearing geological formations, in the paint and dye industries, as dispersants, in personal care products and for carriers in controlled drug delivery.Type: ApplicationFiled: September 6, 2006Publication date: November 13, 2008Inventors: William H. Daly, Ahmad A. Bahamdan
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Patent number: 7449430Abstract: The present invention concerns a water-based drilling mud for utilization in the drilling of oil wells comprising an aqueous phase wherein the aqueous phase contains an oil soluble polymer in the form of a gel as a fluid loss reducer.Type: GrantFiled: June 23, 2006Date of Patent: November 11, 2008Assignee: Eliokem S.A.S.Inventors: Bertrand Guichard, Barry Wood, Patrick Vongphouthone
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Publication number: 20080167204Abstract: A method of enhancing hydration of a hydratable material is described, including providing an aqueous composition including a hydratable material, and supplying energy to the aqueous composition using a cavitation device.Type: ApplicationFiled: January 9, 2007Publication date: July 10, 2008Inventors: Billy Ray Slabaugh, Jimmy Weaver
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Publication number: 20080108522Abstract: A composition for treating wellbore formations is provided consisting of a hydratable polysaccharide, an anionic surfactant, and an aqueous solvent where the hydratable polysaccharide is soluble in the aqueous solvent. The concentration of the anionic surfactant is sufficient to scavenge greater than about 50%, and preferably greater than 90% of the cations contained in the aqueous solvent. The hydratable polysaccharide is preferably anionic and may be a guar, guar derivative, galactomannan, cellulose, or cellulose derivative. The composition may also be a slurry used for preparing aqueous well treatment fluid. A method is also provided for utilizing the composition for fracturing a formation by pumping the fluid into the formation.Type: ApplicationFiled: November 7, 2006Publication date: May 8, 2008Applicant: BJ Services CompanyInventor: Paul Scott Carman
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Patent number: 7345013Abstract: A composition useful for making gelled fluids by crosslinking hydratable polymers is an aqueous solution of zirconium complexed with carbonate and bicarbonate as the only multidentate ligands complexed with zirconium. The composition also provides pH modifying capability and the crosslinking is delayed, so that the single composition replaces several liquid additives previously necessary for generation of fluids used, for example, in hydraulic fracturing.Type: GrantFiled: February 23, 2005Date of Patent: March 18, 2008Assignee: Schlumberger Technology CorporationInventor: Greig Fraser
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Publication number: 20080026958Abstract: One example of the many methods provided includes a method comprising: providing a fluid loss control pill that comprises an aqueous base fluid, a cellulose derivative and a dual functional component, the fluid loss control pill having a first viscosity; allowing the dual functional component to interact with the cellulose derivative in the fluid loss control pill such that the viscosity of the fluid loss control pill increases to a second viscosity, the second viscosity being greater than the first viscosity; placing the fluid loss control pill in a subterranean formation; and allowing the dual functional component to interact with the cellulose derivative so as to reduce the second viscosity of the fluid loss control pill to a third viscosity, the third viscosity being less than the second viscosity.Type: ApplicationFiled: July 27, 2006Publication date: January 31, 2008Inventors: Bradley L. Todd, Karen Savery
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Patent number: 7304019Abstract: Suspensions are provided of water-soluble materials in non-aqueous carrier fluids using suspension agents that include organophilic clays. Methods of forming such suspensions are provided. Methods are also provided for using such suspensions to prepare aqueous solutions, in particular thickened aqueous solutions, in particular for use in oilfield treatments.Type: GrantFiled: May 31, 2006Date of Patent: December 4, 2007Assignee: Schlumberger Technology CorporationInventors: Lijun Lin, Alejandro Pena, Golchehreh Salamat, Michael D. Parris, Geoff Robinson
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Patent number: 7276466Abstract: The present invention relates to improved methods and compositions for reducing the viscosity of subterranean servicing fluids where the servicing fluid has been cross-linked to increase its viscosity and that crosslinking can be reversed using a delayed release acid produced to reduce the fluid's pH.Type: GrantFiled: August 26, 2003Date of Patent: October 2, 2007Assignee: Halliburton Energy Services, Inc.Inventors: Bradley L. Todd, Billy F. Slabaugh, Trinidad Munoz, Jr.
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Patent number: 7271133Abstract: Methods for treating subterranean formations and aqueous treating fluid compositions are provided. The aqueous treating fluid compositions comprise water, a water soluble hydrophobically modified gelling agent polymer produced by grafting a low concentration of hydrophobic monomers thereon, and a low concentration of an ionic surfactant the hydrophobic chain portion of which is associated with the hydrophobic monomers grafted onto the gelling agent polymer resulting in gelling agent polymer molecules having increased radiuses of gyration.Type: GrantFiled: September 24, 2003Date of Patent: September 18, 2007Assignee: Halliburton Energy Services, Inc.Inventors: Jimmie D. Weaver, Billy F. Slabaugn
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Patent number: 7261158Abstract: A method of fracturing a subterranean formation comprising the steps of: providing a coarse-foamed fracturing fluid comprising a liquid fracturing fluid component, a gas, proppant particulates, and a foaming agent; and placing the coarse-foamed fracturing fluid into a portion of a subterranean formation at a pressure sufficient to create or extend at least one fracture therein.Type: GrantFiled: August 18, 2006Date of Patent: August 28, 2007Assignee: Halliburton Energy Services, Inc.Inventors: Richard L. Middaugh, Phillip C. Harris, Stanley J. Heath, Robert S. Taylor, Ottmar F. Hoch, Max L. Phillippi, Billy F. Slabaugh, John M. Terracina
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Patent number: 7259192Abstract: A method of depolymerizing galactomannan-type polysaccharide polymers and xanthan, preferably galactomannans, to a pre-selected lower molecular weight by irradiation with high energy electron beams. The preferred galactomannans for treatment according to this method are guar gum, guar splits and hydroxypropyl guar. In a preferred embodiment the guar gum is depolymerized preferably to a molecular weight of about 150,000 Daltons to about 200,000 Daltons. The depolymerized guar has a polydispersity of less than about 3.0 and is useful in oil well fracturing to enhance oil production.Type: GrantFiled: June 24, 2003Date of Patent: August 21, 2007Assignee: Rhodia, Inc.Inventors: Leo Zhaoqing Liu, Christian Priou
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Patent number: 7201227Abstract: Disclosed herein is a method of treating a subterranean formation utilizing a fluid having a splittable foamer, i.e., a fluid that creates a stable foam when it contacts the formation but that loses its ability to foam as it remains in contact with the formation for extended time. The present method has the advantage that the fluid can be recovered from the well unhindered by the difficulties involved with recovering a foamed fluid from a well. The present method does not require the use of breakers, though the splitting of the foam can be accelerated by introducing an organic or inorganic acid into the well, if so desired.Type: GrantFiled: December 20, 2004Date of Patent: April 10, 2007Assignee: BJ Services CompanyInventors: D. V. Satyanarayana Gupta, Barry T. Hlidek
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Patent number: 7199084Abstract: Suspensions are provided of water-soluble materials in non-aqueous carrier fluids using suspension agents that include thixotropic agents and, optionally, organophilic clays. Methods of forming such suspensions are provided. Methods are also provided for using such suspensions to prepare aqueous solutions, in particular thickened aqueous solutions, in particular for use in oilfield treatments.Type: GrantFiled: March 21, 2002Date of Patent: April 3, 2007Assignee: Schlumberger Technology CorporationInventors: Michael Parris, Geoff Robinson
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Patent number: 7151076Abstract: A low residue well treatment fluid comprises: an aqueous solvent; a gelling agent comprising one or more modified polysaccharides, the modified polysaccharides having hydrophilic groups; and a crosslinking composition. The fluid may optionally further comprise a gel breaker, a buffer and/or a proppant. The fluids generate no or minimal residue upon being broken, and are particularly useful in well fracturing operations.Type: GrantFiled: October 8, 2004Date of Patent: December 19, 2006Assignee: BJ Services CompanyInventors: Qi Qu, Xiaolan Wang
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Patent number: 7144844Abstract: A process for enhancing the productivity of a formation consists of introducing into the formation a viscoelastic fluid which contains at least one surfactant, at least one quaternary amine polyelectrolyte, water, and a non-aqueous solvent. The surfactant forms aggregation structures or vesicles. The fluid, which significantly enhances fluid viscosity and thermal stability, is particularly effective as a diverting fluid to divert an acid treatment package from a high permeability or undamaged portion of a formation to a low permeability or damaged portion of a formation as well as a fracturing fluid. In addition, the fluid is useful for sand control completion.Type: GrantFiled: May 14, 2004Date of Patent: December 5, 2006Assignee: BJ Services CompanyInventors: Qi Qu, David Alleman