Organic Component Contains Carboxylic Acid, Ester, Or Salt Thereof Patents (Class 507/267)
  • Patent number: 7910524
    Abstract: Treatment fluids are provided that include a treatment fluid comprising a base fluid and a gelling agent that comprises clarified diutan. In some embodiments, the treatment fluid is a subterranean treatment fluid. In some embodiments, the treatment fluid is a subterranean treatment fluid comprising a base fluid, a gelling agent that comprises clarified diutan, and at least a plurality of particulates. Additional treatment fluids are also provided.
    Type: Grant
    Filed: February 8, 2007
    Date of Patent: March 22, 2011
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Thomas D. Welton, Richard W. Pauls, Lulu Song, Jason E. Bryant, Sean R. Beach, Ian D. Robb
  • Patent number: 7906461
    Abstract: A composition is comprised of a mixture of the reaction product of an amine and a poly-functional isocyanate, and the reaction product of (i) a carboxylic acid with at least two carboxylic moieties; (ii) a polyamine having an amine functionality of two or more; and a chemical selected from the group consisting of (i) alkoxylated alkyl amines, (ii) fatty acid amides and (iii) mixtures thereof, and it is used as a drilling fluid additive.
    Type: Grant
    Filed: October 22, 2007
    Date of Patent: March 15, 2011
    Assignee: Elementis Specialties, Inc.
    Inventors: David Dino, Jeffrey Thompson, Richard Geurtsen
  • Patent number: 7902123
    Abstract: A cleaning composition including which comprises a surfactant and a propionate as co-surfactant and/or co-solvent. The composition can be used, for example, to clean drilling mud containing oils.
    Type: Grant
    Filed: March 28, 2006
    Date of Patent: March 8, 2011
    Assignee: Surface Active Solutions (Holdings) Limited
    Inventors: John Harrison, Mark Zwinderman
  • Patent number: 7893009
    Abstract: The invention relates to polymers with a mean molecular weight of between 500 and 500,000 g/mol that can be produced as follows: A) reaction of a compound of formula 1, in which n stands for 0, 1 or 2 and A for an arbitrarily substituted C1-C40 group with a compound of the formula 2 B(OH)m in which m is from 2 to 10 and B is a represents an arbitrarily substituted C2-C40 group, B) subsequently reaction of the product thus obtained with a nitrogen-containing carboxylic acid which comprises from 1 to 20 carbon atoms, where the molar ratio between the number of free OH groups of the polyester obtained in step A and the nitrogen-containing carboxylic acid is between 1:0.1 and 1:1. The polymers are used to inhibit gas hydrate formation.
    Type: Grant
    Filed: February 1, 2006
    Date of Patent: February 22, 2011
    Assignee: Clariant Produkte (Deutschland) GmbH
    Inventors: Dirk Leinweber, Michael Feustel
  • Patent number: 7858562
    Abstract: A powder composition comprising viscoelastic surfactant forms, in aqueous solution, a viscoelastic wellbore treatment fluid.
    Type: Grant
    Filed: April 24, 2007
    Date of Patent: December 28, 2010
    Assignee: Schlumberger Technology Corporation
    Inventors: Timothy Gareth John Jones, Gary John Tustin
  • Patent number: 7858563
    Abstract: A treatment of a subterranean formation which contains a hydrocarbon-bearing zone, is carried out using a hydrocarbon-responsive fluid thickened with an oligomeric surfactant consisting of from 2 to 8_linked surfactant monomer subunits. The process of treatment comprises (i) mixing a thickening amount of oligomeric surfactant with an aqueous liquid to make a viscoelastic treatment fluid, (ii) pumping said viscoelastic treatment fluid through a wellbore and into the subterranean formation, where (iii) contact with hydrocarbons within the formation dissipates the viscosity of the treatment fluid.
    Type: Grant
    Filed: January 14, 2010
    Date of Patent: December 28, 2010
    Assignee: Schlumberger Technology Corporation
    Inventors: Trevor Hughes, Timothy Gareth John Jones, Gary John Tustin, Jian Zhou
  • Publication number: 20100323928
    Abstract: A method of creating a carbon dioxide hydrate is disclosed. The preferred steps include supplying liquid carbon dioxide and a dissociation agent to a hydrocarbon hydrate, decomposing the hydrocarbon hydrate by the dissociation agent into a hydrocarbon gas and liquid water, and forming the carbon dioxide hydrate from the liquid carbon dioxide and the liquid water. The dissociation agent preferably is at least one of an inorganic salt, a surface active agent, a hydrate inhibitor, and an absorption solution. Furthermore, a substance composition of liquid carbon dioxide and the dissociation agent is described, which is provided for depositing carbon dioxide hydrate in a subterranean geological formation. Furthermore, a deposition device is described, which is configured for depositing carbon dioxide hydrate in a subterranean geological formation.
    Type: Application
    Filed: June 19, 2009
    Publication date: December 23, 2010
    Applicant: Bergen Teknologioveforing AS
    Inventor: Bjorn Kvamme
  • Patent number: 7846879
    Abstract: The present invention relates to acidic treatment fluids that comprise an acid fluid and an ester-containing quaternary ammonium compound (“esterquat”) and methods of their use. One embodiment of the present invention provides a method of inhibiting metal corrosion during a subterranean treatment operation comprising using an acidic treatment fluid comprising an acidic fluid and an esterquat. Another embodiment of the present invention provides a method of reducing sludge formation during a subterranean treatment operation formation comprising the step of using an acidic treatment fluid comprising an acidic fluid and an esterquat. Another embodiment of the present invention provides a method of inhibiting the formation of emulsions during a subterranean treatment operation comprising using an acidic treatment fluid comprising an acidic fluid and an esterquat. Another embodiment of the present invention provides an acidic subterranean treatment fluid comprising an acidic fluid and an esterquat.
    Type: Grant
    Filed: May 11, 2006
    Date of Patent: December 7, 2010
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Juanita M. Cassidy, Jim L. Lane, Chad E. Kiser
  • Patent number: 7833949
    Abstract: A treatment fluid for treating a subterranean formation penetrated by a wellbore is formed from an aqueous medium, a diutan heteropolysaccharide having a tetrasaccharide repeating unit in the polymer backbone and a peroxide breaker. A method of treating a subterranean formation penetrated by a wellbore may be carried out by introducing the treatment fluid into the formation through the wellbore. Breaking aids or catalysts may also be used with the treatment fluid.
    Type: Grant
    Filed: July 25, 2008
    Date of Patent: November 16, 2010
    Assignee: Schlumberger Technology Corporation
    Inventors: Leiming Li, Curtis L. Boney, Cody Hanzik, Lijun Lin, Syed Ali, Oscar Bustos
  • Patent number: 7833944
    Abstract: Methods and compositions including a method comprising: providing a treatment fluid comprising a carrier fluid and a solid particle comprising a crosslinked aliphatic polyester; and placing the treatment fluid into a subterranean formation.
    Type: Grant
    Filed: June 18, 2009
    Date of Patent: November 16, 2010
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Trinidad Munoz, Larry S. Eoff, Rajesh K. Saini
  • Patent number: 7829510
    Abstract: A composition for treating solid materials is disclosed, where the treating compositions coats surfaces or portions of surfaces of the solid materials changing an aggregation or agglomeration propensity of the materials. Treated solid materials are also disclosed. The methods and treated materials are ideally suited for oil field applications.
    Type: Grant
    Filed: March 11, 2008
    Date of Patent: November 9, 2010
    Assignee: Clear Water International LLC
    Inventors: Larry W. Gatlin, Brian J. Hallett, Ryan L. Cook
  • Publication number: 20100252264
    Abstract: A method of treating a subterranean formation penetrated by a wellbore is accomplished by introducing a fluid into the wellbore containing a combined fluid loss additive and breaker. The combined fluid loss additive and breaker is formed from particles of an organic peroxide provided on a substrate. The particles are sized to facilitate fluid loss control. A treatment operation is carried out wherein a treatment fluid viscosified with a polymer is introduced into the formation through the wellbore.
    Type: Application
    Filed: March 24, 2010
    Publication date: October 7, 2010
    Inventors: Richard D. Hutchins, Joseph A. Ayoub, Andrey Mirakyan, Micheal D. Parris, Stephen D. Mason, Ann M.W. Hoefer
  • Publication number: 20100248997
    Abstract: The invention discloses method of treatment and reuse of oilfield produced water. The method comprises: providing an aqueous medium comprised at least in part of oilfield produced water; contacting the aqueous medium with a zirconium compound; whereby the fluid viscosity and/or fluid drag reduction ability of the combination of the aqueous medium and zirconium compound is improved compared to the aqueous medium alone; introducing the combination in to the well; and allowing the combination to contact the formation. In another embodiment, the aqueous medium is further contacted by a friction-reduction additive. Still in another embodiment, the aqueous medium is further contacted by a gelling additive. Still in another embodiment, the fluid is energized with a gas.
    Type: Application
    Filed: March 24, 2009
    Publication date: September 30, 2010
    Inventors: Leiming Li, Lijun Lin, Chucks I. Ezeokonkwo, Curtis L. Bonney, Paul R. Howard, Sudhir Shenoy, Baudel William Quintero, Ksenia Eliseeva
  • Patent number: 7795189
    Abstract: A process to prepare a solution of zirconium-hydroxyalkylated diamine-lactic acid 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 an alcohol solution of a zirconium complex with an hydroxyalkylated diamine, then with lactic acid to produce a solution of zirconium-hydroxyalkylated diamine-lactic acid complex. The solution is particularly suitable for use in a cross-linking composition in hydraulic fracturing and plugging of permeable zones of subterranean formations at pH of 10 or greater and at temperatures of 275° F. (135° C.) and higher in the formation.
    Type: Grant
    Filed: December 28, 2007
    Date of Patent: September 14, 2010
    Inventor: Donald Edward Putzig
  • Patent number: 7795184
    Abstract: A method of altering the properties of a drilling fluid includes adding effective amounts of crushed or whole oilseeds or mixtures of crushed or whole oilseeds to a drilling fluid. The crushed or whole oilseeds or mixture of crushed or whole oilseeds are selected to impart any one of or a combination of effects including but not limited to: an increase in drilling fluid emulsion stability in oil-based or invert emulsion fluids, decreased specific gravity of the drilling fluid, seepage loss control, filtration control, oil wetting and deflocculation/dispersion, of entrained solids and/or reduced torque and drag of the drilling string.
    Type: Grant
    Filed: June 1, 2009
    Date of Patent: September 14, 2010
    Assignee: Engineered Drilling Solutions, Inc.
    Inventor: Daniel Guy Pomerleau
  • Patent number: 7786051
    Abstract: A method of treating a formation penetrated by a wellbore to reduce fluid loss to the formation is carried out by providing a quantity of water-degradable particles formed from a solid polymeric acid precursor having a number average molecular weight (Mn) of greater than 4000. A slurry of the particles is formed with a carrier fluid, which may be an aqueous fluid. The slurry is introduced into the formation through the wellbore at a pressure below the fracture pressure of the treated formation. A treating fluid is subsequently introduced into the formation through the wellbore. The water-degradable particles degrade by contacting the particles with a free aqueous fluid introduced into the formation through the wellbore. The water-degradable particles may have a particle size of from about 0.25 mm or less. The slurry may contain from about 0.01 kg/L to about 0.15 kg/L of the water degradable particles.
    Type: Grant
    Filed: December 7, 2006
    Date of Patent: August 31, 2010
    Assignee: Schlumberger Technology Corporation
    Inventors: George Lange, Vibhas J. Pandey, Samih Alsyed, Timothy Lesko
  • Patent number: 7781380
    Abstract: Disclosed are methods of treating subterranean formations with rapidly hydratable treatment fluids based upon heteropolysaccharides. In particular, the invention relates to treatment methods with fluids containing a heteropolysaccharide, aqueous medium, and an electrolyte, wherein the fluids may further include a gas component, a surfactant and/or an organoamino compound. The fluids exhibit good rheological properties at elevated temperatures, and unusually rapid hydration rates which allows utilizing such fluids without the need of hydration tanks.
    Type: Grant
    Filed: January 25, 2006
    Date of Patent: August 24, 2010
    Assignee: Schlumberger Technology Corporation
    Inventors: Lijun Lin, Alejandro Pena, Golchehreh Salamat
  • Publication number: 20100210485
    Abstract: The present invention relates to the use of an oil formulation in the field of the oil industry, in particular for the prevention of water penetration. The formulation according to the invention is in particular intended to be injected into underground formations, such as injection wells or production wells.
    Type: Application
    Filed: June 20, 2008
    Publication date: August 19, 2010
    Applicant: RHODIA OPERATIONS
    Inventor: Arnaud Cadix
  • Patent number: 7776796
    Abstract: Methods for treating wellbores using fluids containing a sphingan heteropolysaccharide which contributes viscosity stability and a decrease in friction pressure. Some methods are clean-out operations using recyclable-viscosity fluids containing at least a sphingan heteropolysaccharide and an optional salt. Others include methods of pumping fluids incorporating sphingan heteropolysaccharides to reduce pumping frictional pressure.
    Type: Grant
    Filed: August 16, 2006
    Date of Patent: August 17, 2010
    Assignee: Schlumberger Technology Corporation
    Inventors: Alexander Shapovalov, Alejandro Pena, Bernhard Lungwitz, Rene Schuurman
  • Publication number: 20100204066
    Abstract: A method for removing water from a wellbore fluid is disclosed. The method may include the steps of contacting a wellbore fluid with a water absorbing polymer, where the wellbore fluid includes an aqueous fluid, allowing the water absorbing polymer to interact with the wellbore fluid for a sufficient period of time so that the water absorbing polymer absorbs at least a portion of water in the aqueous fluid, and separating the water absorbing polymer containing the absorbed water from the wellbore fluid.
    Type: Application
    Filed: January 9, 2007
    Publication date: August 12, 2010
    Applicant: M-I LLC
    Inventors: Catalin Ivan, Karen McCosh
  • Publication number: 20100197527
    Abstract: 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: Application
    Filed: April 14, 2010
    Publication date: August 5, 2010
    Inventors: Bradley L. Todd, Karen Savery
  • Publication number: 20100190664
    Abstract: A method of cleaning a wellbore prior to the production of oil or gas, wherein the wellbore has been drilled with an invert emulsion drilling mud that forms an invert emulsion filter cake is disclosed. The method may include circulating a breaker fluid into the wellbore, where the breaker fluid includes a non-oleaginous internal phase and an oleaginous external phase, where the non-oleaginous phase includes a water soluble polar organic solvent, a hydrolysable ester of a carboxylic acid, and a weighting agent, and the oleaginous external phase includes an oleaginous fluid and an emulsifier, and where the hydrolysable ester is selected so that upon hydrolysis an organic acid is released and the invert emulsion of the filter cake breaks.
    Type: Application
    Filed: March 31, 2010
    Publication date: July 29, 2010
    Applicant: M-I LLC
    Inventors: Charles Svoboda, Raymond D. Ravitz, Mark Luyster
  • Patent number: 7757766
    Abstract: Of the many compositions and methods provided herein, an example method includes a method of treating a subterranean formation that comprises combining components comprising water and a density-matched suspension to prepare a treatment fluid, wherein the density-matched suspension comprises a suspending liquid and a solid particle suspended in the suspending liquid, and introducing the treatment fluid into a well bore. An example composition includes a suspension that comprises a suspending liquid comprising a hydrophobic liquid, wherein the hydrophobic liquid hydrolyzes when placed in contact with an aqueous fluid to form hydrophilic products, and a solid particle suspended in the suspending liquid, wherein the suspension is a density-matched suspension.
    Type: Grant
    Filed: November 19, 2008
    Date of Patent: July 20, 2010
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Sam Lewis, Michael Szymanski, Christopher Gordon
  • Patent number: 7754660
    Abstract: A process to prepare a solution of zirconium-alkanolamine-hydroxycarboxylic acid 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 an alcohol solution of a zirconium complex with an alkanolamine, then with an ?-hydroxycarboxylic acid to produce a solution of zirconium-alkanolamine-hydroxycarboxylic acid complex. The solution is particularly suitable for use in a cross-linking composition in hydraulic fracturing and plugging of permeable zones of subterranean formations at temperatures of 275° F. (135° C.) and higher in the formation.
    Type: Grant
    Filed: December 18, 2007
    Date of Patent: July 13, 2010
    Assignee: E.I. du Pont de Nemours and Company
    Inventor: Donald Edward Putzig
  • Patent number: 7749944
    Abstract: Methods of improving shear recovery time of viscoelastic surfactant fluid systems are described, one method involving providing a viscoelastic surfactant fluid system comprising a major portion of a surfactant and a rheology enhancer in a concentration sufficient to shorten shear recovery time of the fluid system compared to shear recovery time of the fluid system absent the rheology enhancer, the rheology enhancer selected from aromatic sulfonates having a molecular weight of at least 500; and injecting the fluid system down a well. The rheology enhancer may be a lignosulfonate derived from wood pulping. Viscoelastic surfactant systems including the rheology enhancer are also described.
    Type: Grant
    Filed: February 10, 2009
    Date of Patent: July 6, 2010
    Assignee: Schlumberger Technology Corporation
    Inventors: Yiyan Chen, Jesse C. Lee, Eric Hanson
  • Publication number: 20100167967
    Abstract: A treatment of a subterranean formation which contains a hydrocarbon-bearing zone, is carried out using a hydrocarbon-responsive fluid thickened with an oligomeric surfactant consisting of from 2 to 8_linked surfactant monomer subunits. The process of treatment comprises (i) mixing a thickening amount of oligomeric surfactant with an aqueous liquid to make a viscoelastic treatment fluid, (ii) pumping said viscoelastic treatment fluid through a wellbore and into the subterranean formation, where (iii) contact with hydrocarbons within the formation dissipates the viscosity of the treatment fluid.
    Type: Application
    Filed: January 14, 2010
    Publication date: July 1, 2010
    Applicant: Schlumberger Technology Corporation
    Inventors: Trevor Hughes, Timothy Gareth John Jones, Gary John Tustin, Jian Zhou
  • Publication number: 20100167962
    Abstract: A treatment fluid and system are disclosed for cleaning borehole filtercake using the treatment fluid, wherein the filtercake contains reservoir drilling fluid (RDF) solids. The treatment fluid comprises a fluoride source providing a 1.2 to 5 molar fluoride concentration, and another acid or combination of acids to provide a pH between 1.8 and 5. The treatment fluid is balanced for a dissolving power high enough to have significant dissolution of the filtercake, but low enough for even propagation to avoid premature leak-off.
    Type: Application
    Filed: March 10, 2010
    Publication date: July 1, 2010
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Laurent Pirolli, Mehmet Parlar
  • Publication number: 20100167966
    Abstract: Provided is an anticorrosive composition for use in aqueous salt solutions. The composition contains an antimony compound and at least two other components selected from morpholine derivatives, acetylenic alcohols, ascorbic acid derivatives, and selenium compounds. The composition is particularly useful for inhibiting corrosion of metallic surfaces of drilling devices or refrigeration systems that are in contact with salt brines at elevated temperatures.
    Type: Application
    Filed: February 12, 2007
    Publication date: July 1, 2010
    Applicant: BROMINE COMPOUNDS LTD.
    Inventors: Serge Gutman, Sharon Krumbein, David Itzhak, Mira Bergstein Freiberg
  • Publication number: 20100160189
    Abstract: The current disclosure describes a multifunctional fluid that addresses a new concept in the removal of filter cake. A composition is disclosed comprising: a carrier fluid, a surfactant, a fluorine source and an organic stabilizer able to minimize precipitation of fluorine The associated method to remove the filter cake is also described.
    Type: Application
    Filed: December 19, 2008
    Publication date: June 24, 2010
    Inventors: Michael J. Fuller, Syed Ali, Laurent Pirolli, John W. Still
  • Patent number: 7741251
    Abstract: The present invention relates to well bore stabilization and, more particularly, to treatment fluids that may reduce the tendency of shales to swell and associated methods. In some embodiments, the present invention provides a method of stabilizing a subterranean formation that comprises a shale, the method comprising contacting the subterranean formation that comprises the shale with a treatment fluid, the treatment fluid comprising a base fluid, and a hydrophobically modified polymer. In other embodiments, the treatment fluids comprise a base fluid and a hydrophilically modified polymer. In yet other embodiments, the present invention provides shale-inhibiting components, treatment fluids, and methods of reducing the tendency of shale to swell when exposed to a treatment fluid.
    Type: Grant
    Filed: June 4, 2004
    Date of Patent: June 22, 2010
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Larry S. Eoff, B. Raghava Reddy, J. Michael Wilson
  • Patent number: 7741252
    Abstract: An oilfield treatment method is given that uses fluids that contain surfactants used as foamers and/or viscosifiers such that the fluids pass the Alberta Energy and Utilities Board Directive 27 requirements for low toxicity to certain bioluminescent bacteria. Such fluids may be used in oilfield treatments, for example drilling and stimulation, near fresh water aquifers. The surfactants are certain non-ionic surfactants that are not aromatic, or certain amphoteric surfactants (that can be neutral), or certain zwitterionic surfactants, (in which both positive and negative charges are present in a single molecule so that the whole molecule is neutral).
    Type: Grant
    Filed: December 11, 2006
    Date of Patent: June 22, 2010
    Assignee: Schlumberger Technology Corporation
    Inventors: Yiyan Chen, Richard Marcinew, Carlos Abad
  • Patent number: 7732382
    Abstract: 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: Grant
    Filed: February 14, 2006
    Date of Patent: June 8, 2010
    Assignee: E.I. du Pont de Nemours and Company
    Inventor: Donald Edward Putzig
  • Patent number: 7727935
    Abstract: Among many things, in some embodiments, dual-function additives that enhance fluid loss control and the stability of viscoelastic surfactant fluids, and their associated methods of use in subterranean formations, are provided. In one embodiment, the methods comprise: providing a viscoelastic surfactant fluid that comprises an aqueous base fluid, a viscoelastic surfactant, and a dual-function additive that comprises a soap component; and introducing the viscoelastic surfactant fluid into at least a portion of a subterranean formation.
    Type: Grant
    Filed: December 29, 2006
    Date of Patent: June 1, 2010
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Thomas D. Welton, David E. McMechan, Jason E. Bryant
  • Patent number: 7718584
    Abstract: Among many things, in some embodiments, dual-function additives that enhance fluid loss control and the stability of viscoelastic surfactant fluids, and their associated methods of use in subterranean formations, are provided. In one embodiment, the methods comprise: providing a viscoelastic surfactant fluid that comprises an aqueous base fluid, a viscoelastic surfactant, and a dual-function additive that comprises a soap component; and introducing the viscoelastic surfactant fluid into at least a portion of a subterranean formation.
    Type: Grant
    Filed: December 29, 2006
    Date of Patent: May 18, 2010
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Thomas D. Welton, David E. McMechan, Jason E. Bryant
  • Patent number: 7709421
    Abstract: Single phase microemulsions improve the removal of filter cakes formed during drilling with oil-based muds (OBMs). 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. In another optional embodiment, the single phase microemulsion may contain a filtration control additive for delaying the filter cake removal, destruction or conversion.
    Type: Grant
    Filed: October 17, 2007
    Date of Patent: May 4, 2010
    Assignee: Baker Hughes Incorporated
    Inventors: Thomas A. Jones, David E. Clark, Lirio Quintero
  • Patent number: 7704926
    Abstract: The present invention provides aqueous viscoelastic compositions comprising a cleavable surfactant and possibly also an electrolyte. The cleavable surfactants useful in the present invention comprise at least one weak chemical bond, which is capable of being broken under appropriate conditions, to produce oil soluble and water soluble products typically having no interfacial properties and surface activity compared with the original surfactant molecule. Further, the rheological properties of the aqueous viscolelastic composition are usually altered upon cleavage of the cleavable surfactant generally resulting in the elimination of the viscofying, viscoelastic and surfactant properties of the composition. Aqueous viscoelastic compositions in accordance with the present invention are suitable for use in oil-field applications, particularly for hydraulic fracturing of subterranean formations. Thus, the present invention also relates to a wellbore service fluid and a method of fracturing a subterranean formation.
    Type: Grant
    Filed: February 13, 2002
    Date of Patent: April 27, 2010
    Assignee: Schlumberger Technology Corporation
    Inventors: Jian Zhou, Trevor Hughes
  • Patent number: 7696135
    Abstract: Fluids viscosified with viscoelastic surfactants (VESs) may have their viscosities reduced (gels broken) by the direct or indirect action of an internal breaker composition that contains at least one mineral oil, at least one polyalphaolefin oil, at least one saturated fatty acid and/or at least one unsaturated fatty acid. The internal breaker may initially be dispersed oil droplets in an internal, discontinuous phase of the fluid. In one non-limiting embodiment, the internal breaker, e.g. mineral oil, is added to the fluid after it has been substantially gelled. An oil-soluble surfactant is present to enhance or accelerate the reduction of viscosity of the gelled aqueous fluid.
    Type: Grant
    Filed: September 4, 2007
    Date of Patent: April 13, 2010
    Assignee: Baker Hughes Incorporated
    Inventors: James B. Crews, Tianping Huang
  • Patent number: 7696132
    Abstract: Methods of stimulating biogenic production of a metabolic product with enhanced hydrogen content are described. The methods may include accessing a consortium of microorganisms in a geologic formation that includes a carbonaceous material. They may also include providing hydrogen and one or more phosphorous compounds to the microorganisms. The combination of the hydrogen and phosphorous compounds stimulates the consortium to metabolize the carbonaceous material into the metabolic product with enhanced hydrogen content. Also, methods of stimulating biogenic production of a metabolic product with enhanced hydrogen content by providing a carboxylate compound, such as acetate, to a consortium of microorganisms is described. The carboxylate compound stimulates the consortium to metabolize carbonaceous material in the formation into the metabolic product with enhanced hydrogen content.
    Type: Grant
    Filed: April 5, 2006
    Date of Patent: April 13, 2010
    Assignee: LUCA Technologies, Inc.
    Inventors: Robert S. Pfeiffer, Glenn A. Ulrich, Mark Finkelstein
  • Patent number: 7687439
    Abstract: 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: Grant
    Filed: October 2, 2006
    Date of Patent: March 30, 2010
    Assignee: Baker Hughes Incorporated
    Inventors: Thomas A. Jones, David E. Clark, Lirio Quintero, Bruce Rae Ewen
  • Patent number: 7674753
    Abstract: Presented herein are improved bridging agents comprising a degradable material, improved subterranean treatment fluids comprising such improved bridging agents, and methods of using such improved subterranean treatment fluids in subterranean formations. An example of a method presented is a method of drilling a well bore in a subterranean formation. Another example of a method presented is a method of forming a self-degrading filter cake in a subterranean formation. Another example of a method presented is a method of degrading a filter cake in a subterranean formation. An example of a composition of the present invention is a treatment fluid including a viscosifier, a fluid loss control additive, and a bridging agent comprising a degradable material. Another example of a composition presented is a bridging agent comprising a degradable material.
    Type: Grant
    Filed: December 5, 2006
    Date of Patent: March 9, 2010
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Trinidad Munoz, Jr., Larry S. Eoff
  • Publication number: 20100056402
    Abstract: Compositions and methods are given for delayed breaking of viscoelastic surfactant gels inside formation pores, particularly for use in hydraulic fracturing. Breaking inside formation pores is accomplished without mechanical intervention or use of a second fluid. Acidic internal breakers such as sulfuric acid and nitric acid are used. The break may be accelerated, for example with a free radical propagating species, or retarded, for example with an oxygen scavenger.
    Type: Application
    Filed: November 6, 2009
    Publication date: March 4, 2010
    Inventors: Leiming Li, Lijun Lin, Carlos Abad, Toan Bui
  • Patent number: 7670995
    Abstract: A viscoelastic wellbore treatment fluid comprises an effective amount of an oligomeric surfactant for controlling the viscoelasticity of the fluid.
    Type: Grant
    Filed: July 11, 2001
    Date of Patent: March 2, 2010
    Assignee: Schlumberger Technology Corporation
    Inventors: Trevor Hughes, Timothy Gareth John Jones, Gary John Tustin, Jian Zhou
  • Publication number: 20100044048
    Abstract: 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: Application
    Filed: July 22, 2009
    Publication date: February 25, 2010
    Applicant: Century Oilfield Services Inc.
    Inventors: Timothy Tyler Leshchyshyn, Peter William Beaton, Thomas Michael Coolen
  • Publication number: 20100048431
    Abstract: Methods and compositions useful in treating subterranean formations, and more particularly, breaker compositions that may be useful in treating subterranean formations wherein synthetic polymers are used, are provided. Of the many methods and compositions provided herein, one composition comprises a source of hydrogen peroxide and an activator. One method comprises providing a polymer breaker composition comprising a source of hydrogen peroxide and an activator; introducing the polymer breaker composition into a well bore which penetrates a subterranean formation; allowing the activator to activate the source of hydrogen peroxide to create an oxidizing species; and allowing the oxidizing species to break synthetic polymers present in the subterranean formation.
    Type: Application
    Filed: August 21, 2008
    Publication date: February 25, 2010
    Inventors: Rajesh K. Saini, Michael W. Sanders, Fong-Fong Foo, Jeff L. Mundy
  • Patent number: 7666821
    Abstract: Embodiments of the Present Invention relate to a reversibly thickenable non-polymeric fluid that has low viscosity in strong acid, gels when the acid concentration is reduced by only a small amount, and is subsequently decomposed by the acid. In particular it relates to an aqueous mixture of zwitterionic surfactants, inorganic acids, and organic acids Most particularly it relates to the use of this fluid as a diverting agent for easily-damaged sandstones, for example prior to matrix acidizing.
    Type: Grant
    Filed: February 20, 2003
    Date of Patent: February 23, 2010
    Assignee: Schlumberger Technology Corporation
    Inventor: Diankui Fu
  • Patent number: 7662755
    Abstract: Sealant compositions and methods of using the same to isolate a subterranean zone are provided. The compositions include partially polymerized furfuryl alcohol/aldehyde, a coupling agent, a diluent, a curing agent, a ductility imparting agent, and a filler for increasing the compressive strengths of the sealant compositions. Methods of isolating a subterranean zone include pumping the foregoing sealant composition into a well bore down through a conduit and up through an annulus disposed between the conduit and the walls of the well bore. The sealant composition exhibits a sufficiently long cure time such that it does not harden until it reaches the annulus. Thus, the sealant composition effectively attaches the conduit to the walls of the well bore. The sealant composition is substantially resistant to degradation by waste chemicals disposed of in the well bore.
    Type: Grant
    Filed: January 13, 2005
    Date of Patent: February 16, 2010
    Assignee: Halliburton Energy Services, Inc.
    Inventors: B. Raghava Reddy, Philip D. Nguyen
  • Patent number: 7662756
    Abstract: A fluid for use in a subterranean formation penetrated by a wellbore, the fluid comprising: (a) water; (b) an orthoester; and (c) a surfactant comprising a tertiary alkyl amine ethoxylate generally represented by the following formula: (CH2—CH2—O)XH R—N< (CH2—CH2—O)YH wherein R is an alkyl group or aryl group, and wherein X and Y are each independently at least one. A method of fracturing a subterranean formation, comprising the step of forming a foamed fracturing fluid comprising water; an orthoester; a surfactant comprising a tertiary alkyl amine ethoxylate generally represented by the formula above; and a gas. The method also provides the step of introducing the foamed fracturing fluid into a subterranean formation at a pressure sufficient to create a fracture in the subterranean formation.
    Type: Grant
    Filed: October 12, 2007
    Date of Patent: February 16, 2010
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Thomas D. Welton, Bradley L. Todd, David McMechan
  • Patent number: 7655604
    Abstract: Hydraulic fracturing of a subterranean hydrocarbon reservoir is carried out using an aqueous wellbore fluid which is an aqueous solution of a surfactant which has the formula (R1—X)nZ, where R1 is an aliphatic group comprising a C10-C25 principal straight chain bonded at a terminal carbon atom thereof to X, and comprising at least one C1-C6 side chain. X is a charged head group, Z is a counterion, and n is an integer which ensures that the surfactant is charge neutral. The surfactant reversibly thickens the aqueous solution such that the wellbore fluid is a viscoelastic gel. The viscoelastic gel breaks and undergoes a reduction in viscosity within the reservoir and surfactant from the broken gel mixes with hydrocarbon in the reservoir.
    Type: Grant
    Filed: July 7, 2009
    Date of Patent: February 2, 2010
    Assignee: Schlumberger Technology Corporation
    Inventors: Timothy Gareth John Jones, Gary J Tustin
  • Patent number: 7652074
    Abstract: An oil-in-water-in-oil emulsion (O/W/O) comprising a first oil-in-water emulsion dispersed in a second oil, and a method of preparing the same. The O/W/O emulsion can be used as a drive fluid in an enhanced oil recovery process. The O/W/O emulsion of this invention may also be used as a lubricant, and has the beneficial property of being resistant to shear forces.
    Type: Grant
    Filed: December 19, 2007
    Date of Patent: January 26, 2010
    Assignee: ExxonMobil Upstream Research Company
    Inventor: Ramesh Varadaraj
  • Patent number: 7635028
    Abstract: Compositions and methods are given for delayed breaking of viscoelastic surfactant gels inside formation pores, particularly for use in hydraulic fracturing. Breaking inside formation pores is accomplished without mechanical intervention or use of a second fluid. Acidic internal breakers such as sulfuric acid and nitric acid are used. The break may be accelerated, for example with a free radical propagating species, or retarded, for example with an oxygen scavenger.
    Type: Grant
    Filed: June 28, 2007
    Date of Patent: December 22, 2009
    Assignee: Schlumberger Technology Corporation
    Inventors: Leiming Li, Lijun Lin, Carlos Abad, Toan Bui