Polymer Contains Vinyl Alcohol Unit Patents (Class 507/124)
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Patent number: 11639459Abstract: A fluid is provided. The fluid includes a base fluid and an additive. The additive has a marker functional group that absorbs infrared radiation having a wavelength in a predetermined range between about 2100 cm?1 and about 2300 cm?1.Type: GrantFiled: June 21, 2022Date of Patent: May 2, 2023Assignee: Halliburton Energy Services, Inc.Inventors: Jay Paul Deville, Preston Andrew May, Michele Suzanne Brown
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Patent number: 10800892Abstract: A nano-emulsion composition having a small particle size and ultra-low concentration and a preparation method thereof is disclosed. The raw materials of the composition comprise, in terms of percentage by weight, 0.002% to 0.2% of a polymer-containing homogeneous microemulsion, water, and 99.998% to 99.8% of an organic salt solution or inorganic salt solution. The composition is prepared by diluting a polymer-containing homogeneous microemulsion with water or a salt solution. The polymer-containing homogeneous microemulsion is formed by mixing the following raw materials, in terms of percentage by weight: 8% to 40% of a surfactant, 0.5% to 10% of a polymer, 10% to 30% of an alcohol, 3% to 30% of an oil, 0% to 20% of a salt, and balance of water. The composition of the invention is low in concentration, low in cost, narrow in particle size distribution, good in stability, simple in preparation, and convenient for storage and use.Type: GrantFiled: December 13, 2018Date of Patent: October 13, 2020Assignees: China University of Petroleum-Beijing, KMS OIL FIELD CHEMICALS & TECHNICAL SERVICES LTD., Zhong Shi Da Engineering Research Center Co. Ltd., PetroChina Company LimitedInventors: Fujian Zhou, Erdong Yao, Jiangwen Xu, Zhao Luo, Yuan Li, Xiuhui Li, Jiaxin Sun, Xiongfei Liu, Jie Zuo, Xugang Wang, Cuihong Zhou
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Patent number: 10118978Abstract: Provided by the present invention is a vinyl alcohol polymer crosslinked by a structure represented by the following formula (1) and/or a disulfide structure, in which the vinyl alcohol polymer is not completely dissolved in a mixture prepared by: adding the vinyl alcohol polymer to water so as to give a concentration of 4% by mass; and stirring at 95° C. for 3 hrs. in the formula (1), R1, R2 and R3 each independently represent a hydrogen atom or a substituted or unsubstituted hydrocarbon group having 8 or less carbon atoms. Also provided include an additive for a drilling mud containing the vinyl alcohol polymer, a drilling mud containing the vinyl alcohol polymer as an additive, an additive for a drilling cement slurry containing the vinyl alcohol polymer, and a drilling cement slurry containing the vinyl alcohol polymer as an additive.Type: GrantFiled: September 11, 2014Date of Patent: November 6, 2018Assignee: KURARAY CO., LTD.Inventors: Yosuke Kumaki, Yasutomo Saito
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Publication number: 20150133346Abstract: The present invention relates to a process for preparing control agents for applications in the petroleum field, where a polymer bearing —OH, amine and/or amide functions, which is in the form of a divided solid, is reacted with at least one crosslinking agent bearing at least two —R groups capable of reacting with the —OH, amine or amide groups, under conditions where said polymer remains in solid form and where said crosslinking agent is at least partly in vapour form, The invention also relates to the control agents obtained in solid form according to this process, and also to the mixtures of these solid agents with other additives, which can be used in particular for the preparation of cement grout for oil extraction.Type: ApplicationFiled: January 25, 2013Publication date: May 14, 2015Inventor: Arnaud Cadix
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Publication number: 20150027702Abstract: Methods of treating a subterranean formation are disclosed that include placing a treatment fluid into a subterranean formation, the treatment fluid containing a one or more polymers capable of consolidating to form a polymeric structure at a downhole location. Also disclosed are treatment fluids including a polymeric structure for treating a subterranean formation.Type: ApplicationFiled: July 23, 2014Publication date: January 29, 2015Inventors: Jazmin Godoy-Vargas, Sergey Makarychev-Mikhailov, Brent Busby, Philip Sullivan, Patrice Abivin, Marie Cambournac
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Patent number: 8822386Abstract: Nanomaterial compositions are useful for applications in drilling and completion fluids as enhancers of electrical and thermal conductivity, emulsion stabilizers, wellbore strength improvers, drag reduction agents, wettability changers, corrosion coating compositions and the like. These nanomaterials may be dispersed in the liquid phase in low volumetric fraction, particularly as compared to corresponding agents of larger size. Nanofluids (fluids containing nano-sized particles) may be used to drill at least part of the wellbore. Nanofluids for drilling and completion applications may be designed including nanoparticles such as carbon nanotubes. These fluids containing nanomaterials, such as carbon nanotubes, meet the required rheological and filtration properties for application in challenging HPHT drilling and completions operations.Type: GrantFiled: June 22, 2011Date of Patent: September 2, 2014Assignee: Baker Hughes IncorporatedInventors: Lirio Quintero, Antonio Enrique Cardenas, David E. Clark
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Publication number: 20140174724Abstract: The present invention relates to hollow hydrogel capsules. In various embodiments, the present invention provides a method of treating a subterranean formation with a hollow hydrogel capsule including a hydrogel shell including a hydrolyzed and crosslinked polymerized composition. The hollow hydrogel capsule also includes a hollow interior including at least one component of a downhole composition for subterranean petroleum or water well drilling, stimulation, clean-up, production, completion, abandonment, or a combination thereof. In various embodiments, the present invention provides compositions comprising the hollow hydrogel capsules and methods of making the hollow hydrogel capsules.Type: ApplicationFiled: December 21, 2012Publication date: June 26, 2014Applicant: Halliburton Energy Services, Inc.Inventors: Philip Wayne Livanec, Scott Anthony Klasner
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Publication number: 20140135237Abstract: A variety of methods and compositions are disclosed, including, in one embodiment, a method of treating a subterranean formation comprising: providing coated particles, wherein the coated particles comprise solid particles coated with an expandable coating; and introducing the coated particles into a permeable zone of the subterranean formation such that the coated particles form a barrier to fluid flow in the permeable zone. In another embodiment, a method of drilling a well bore may be provided, the method comprising: including coated particles in a drilling fluid, the coated particles comprising solid particles coated with an expandable coating; using a drill bit to enlarge the well bore; and circulating the drilling fluid past the drill bit.Type: ApplicationFiled: November 15, 2012Publication date: May 15, 2014Applicant: HALLIBURTON ENERGY SERVICES, INC.Inventors: Alfredo Villarreal, JR., William Walter Shumway
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Publication number: 20130296199Abstract: An engineered composition for reducing lost circulation in a well includes a mixture of coarse, medium and optional fine particles, and a blend of long fibers and short fibers. The long fibers are rigid and the short fibers are flexible. The long fibers form a tridimensional mat or net in the lost-circulation pathway that traps the mixture of particles and short flexible fibers to form a mud cake. The mixture of particles and blend of fibers may be added to water based and oil-based drilling fluids. The composition, size, and concentration of each component of the mixture of particles and blend of fibers may be fine-tuned for each application.Type: ApplicationFiled: July 2, 2013Publication date: November 7, 2013Applicant: Schlumberger Technology CorporationInventor: Jaleh Ghassemzadeh
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Publication number: 20130264121Abstract: Methods and compositions for use in drilling a wellbore into an earthen formation that includes the use of a graphene-based material, where the graphene-based material may be at least one of graphene, graphene oxide, chemically converted graphene, and derivatized graphite oxide are shown and described. In certain examples, the methods and compositions reduce permeability damage and/or stabilize shales.Type: ApplicationFiled: October 6, 2011Publication date: October 10, 2013Applicants: WILLIAM MARSH RICE UNIVERSITY, M-I L.L.C.Inventors: Steve Young, James Friedheim, Arvind D. Patel, James Tour, Dmitry Kosynkin
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Patent number: 8541346Abstract: The present invention relates to bridging agents for use in subterranean formations, to well drill-in and servicing fluids comprising such bridging agents, and to methods of using such bridging agents and well drill-in and servicing fluids in subterranean drilling operations. An example of a well drill-in and servicing fluid of the present invention comprises a viscosified fluid, a fluid loss control additive, and a bridging agent comprising a degradable material.Type: GrantFiled: May 25, 2010Date of Patent: September 24, 2013Assignee: Halliburton Energy Services, Inc.Inventors: Bradley L. Todd, Trinidad Munoz, Jr.
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Patent number: 8479817Abstract: A system for curing lost circulation is made of fibers and a material able to stick fibers in a network when activated. Such activation can be temperature or pH change or both. The fibers can be metallic amorphous fibers, metallic non-amorphous fibers, glass fibers, carbon fibers, polymeric fibers and combinations thereof. The material can be a fiber coating or an additional material, for example polyvinyl alcohol, polyurethane and heat activated epoxy resin.Type: GrantFiled: December 23, 2008Date of Patent: July 9, 2013Assignee: Schlumberger Technology CorporationInventors: Nikhil Shindgikar, Jesse Lee
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Patent number: 8404622Abstract: A composition for reducing lost circulation in a well, while drilling the well with a drilling mud, which is composed of a base fluid, a mixture of particles, and a blend of fibers. The composition is used by stopping drilling with the mud, injecting a spacer, injecting the water-based composition, injecting a spacer, and resuming drilling with the oil-based mud.Type: GrantFiled: April 7, 2011Date of Patent: March 26, 2013Assignee: Schlumberger Technology CorporationInventor: Jaleh Ghassemzadeh
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Publication number: 20130065765Abstract: The present disclosure relates to degradable superabsorbent materials based on acetals of glyoxylic acid and derivatives thereof with polyvinyl alcohol, and methods of making the polymers. The polymers are used to make superabsorbent particles, coatings, sheets, and fibers. Formulations and articles including the superabsorbent polymers, particles, coatings, sheets, and fibers are also disclosed.Type: ApplicationFiled: July 5, 2011Publication date: March 14, 2013Inventors: Sergey Selifonov, Marc Scholten, Ning Zhou
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Patent number: 8371381Abstract: Mixtures of fibers and solid particles are effective for curing fluid losses and lost circulation in a subterranean well. Stiff fibers are more effective than flexible ones; however, mixtures of stiff and flexible fibers have a synergistic effect. The quantity and particle-size distribution of the solids are optimized according to the stiffness, dimensions and concentrations of fibers.Type: GrantFiled: May 19, 2010Date of Patent: February 12, 2013Assignee: Schlumberger Technology CorporationInventors: Nikhil Shindgikar, Jesse Lee, Slaheddine Kefi, Chrystel Cambus-Brunet, Michel Ermel
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Publication number: 20120285745Abstract: An additive for a water-based mud drilling fluid or for drill-in fluids comprises a 0.5 wt % solution of 87-89 mole % hydrolysed polyvinylalcohol, having a weight average molecular weight of about 20,000. Use of the additive may reduce susceptibility of a wellbore to blockages, reduce accumulation of accretions between a drill string and wellbore casing, reduce bit-balling and facilitate separation of undesirable insoluble solids from a drilling fluid returned to the surface.Type: ApplicationFiled: January 25, 2011Publication date: November 15, 2012Applicant: OILFLOW SOLUTIONS HOLDINGS LIMITEDInventors: Philip Fletcher, Michael John Crabtree, Jeffrey Forsyth
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Publication number: 20120264655Abstract: Polymers and hydrogels that are provided that are thermo-responsive, such as thermo-thickening polymers and hydrogels, as well as aqueous solutions whose rheological properties may be modified by including the polymers, hydrogels, or combinations thereof. Such thermo-responsive polymers or hydrogels, or aqueous solutions including the polymers or hydrogels, may be used as additives to reservoir drilling fluids (RDF's), fluid loss control (FLC) pills, hydraulic fracturing fluids (frac fluids), and lost circulation (LC) pills. The polymers or hydrogels may impart a rheological profile that is generally flat with respect to variations in the shear-rate and temperature environment in which drilling fluids, RDF's, FLC pills, frac fluids, and LC pills are deployed. Embodiments include the process of producing a high performance filtercake through the application of thermo-responsive hydrogels and/or thermo-responsive polymer solutions.Type: ApplicationFiled: April 12, 2012Publication date: October 18, 2012Applicant: CORSICANA TECHNOLOGIES, INC.Inventors: Shawn Fitch, Robert L. Horton, Brian L. Mueller
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Publication number: 20120190593Abstract: Disclosed is a two-component fluid loss control system comprising a core substrate and a polymeric shell cooperating with each other to form a microcomposite, wherein the core substrate and the polymeric shell are formed from different materials. The system can demonstrate switchable behavior. The core substrate and the polymeric shell can be further modified, where modifications cooperate with each other to form the microcomposite. Also disclosed are formulations for fluid loss control and methods for controlling fluid loss in a well.Type: ApplicationFiled: January 26, 2012Publication date: July 26, 2012Inventors: David S. Soane, Robert P. Mahoney, Rosa Casado Portilla, Philip Wuthrich
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Publication number: 20120015852Abstract: Nanomaterial compositions are useful for applications in drilling and completion fluids as enhancers of electrical and thermal conductivity, emulsion stabilizers, wellbore strength improvers, drag reduction agents, wettability changers, corrosion coating compositions and the like. These nanomaterials may be dispersed in the liquid phase in low volumetric fraction, particularly as compared to corresponding agents of larger size. Nanofluids (fluids containing nano-sized particles) may be used to drill at least part of the wellbore. Nanofluids for drilling and completion applications may be designed including nanoparticles such as carbon nanotubes. These fluids containing nanomaterials, such as carbon nanotubes, meet the required rheological and filtration properties for application in challenging HPHT drilling and completions operations.Type: ApplicationFiled: June 22, 2011Publication date: January 19, 2012Applicant: Baker Hughes IncorporatedInventors: Lirio Quintero, Antonio Enrique Cardenas, David E. Clark
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Publication number: 20110294704Abstract: Methods of reducing the permeability of a subterranean formation to aqueous-based fluids using a water-soluble relative permeability modifier that comprises a hydrophobically modified polymer, wherein the hydrophobically modified polymer is a reaction product of: a hydrophilic polymer that comprises a polymer selected from the group consisting of a polyvinylamine, a poly(vinylamine/vinyl alcohol), and an alkyl acrylate polymer; and, a hydrophobic compound comprising at least one alkyl chain having a carbon chain length between about 4 and about 22 carbons. The water-soluble relative permeability modifier may be placed within a subterranean drilling operation such that the water-soluble relative permeability modifier attaches onto surfaces within the subterranean formation to effect permeability of aqueous fluids.Type: ApplicationFiled: August 10, 2011Publication date: December 1, 2011Inventors: Larry S. Eoff, Eldon D. Dalrymple, B. Raghava Reddy
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Publication number: 20110183874Abstract: A composition for reducing lost circulation in a well, while drilling the well with a drilling mud, which is composed of a base fluid, a mixture of particles, and a blend of fibers. The composition is used by stopping drilling with the mud, injecting a spacer, injecting the water-based composition, injecting a spacer, and resuming drilling with the oil-based mud.Type: ApplicationFiled: April 7, 2011Publication date: July 28, 2011Applicant: Schlumberger Technology CorporationInventor: Jaleh Ghassemzadeh
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Compositions having pH-dependent viscosity, thickener systems containing the same, and uses therefor
Patent number: 7956013Abstract: Compositions comprising: (A) at least one surfactant of the general formula (I) (R1—[(O—(CH2)2)x1(O—CH(CH3)CH2)x2]O)kP(?O)(OH)3-k??(I) wherein the sequence of the alkyleneoxy units is arbitrary, each R1 independently represents a moiety selected from the group consisting of linear and branched C12-C22-alkyl, C12-C22-alkenyl, C12-C22-alkynyl, (C11-C21-alkyl)carbonyl, (C11-C21-alkenyl)carbonyl and (C11-C21-alkynyl)carbonyl, k represents 1 or 2 and x1 and x2 each independently represent an integer of 0 to 20, the sum of x1 and x2 being a number of 1 to 20; and (B) at least one thickener comprising at least two hydrophobic groups R2 which are linked to one another via a bridging hydrophilic group (?), wherein each R2, independently represents a moiety selected from the group consisting of C8-C32-alkyl, C8-C32-alkenyl, C8-C32-alkynyl, cycloalkyl, aryl, and aryl-C1-C32-alkyl, which in each case may have up to 3 hydroxyl substituents; wherein the composition has a pH which is viscosity-dependent.Type: GrantFiled: November 29, 2007Date of Patent: June 7, 2011Assignee: BASF SEInventors: Ulrich Steinbrenner, Günter Oetter, Uwe Ossmer, Marcus Guzmann -
Patent number: 7923413Abstract: A composition for reducing lost circulation in a well, while drilling the well with a drilling mud, which is composed of a base fluid, a mixture of particles, and a blend of fibers. The composition is used by stopping drilling with the mud, injecting a spacer, injecting the water-based composition, injecting a spacer, and resuming drilling with the oil-based mud.Type: GrantFiled: May 19, 2009Date of Patent: April 12, 2011Assignee: Schlumberger Technology CorporationInventor: Jaleh Ghassemzadeh
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Publication number: 20100298175Abstract: A composition for reducing lost circulation in a well, while drilling the well with a drilling mud, which is composed of a base fluid, a mixture of particles, and a blend of fibers. The composition is used by stopping drilling with the mud, injecting a spacer, injecting the water-based composition, injecting a spacer, and resuming drilling with the oil-based mud.Type: ApplicationFiled: May 19, 2009Publication date: November 25, 2010Inventor: Jaleh Ghassemzadeh
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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: 20100152070Abstract: An engineered composition for reducing lost circulation in a well includes a mixture of coarse, medium and optional fine particles, and a blend of long fibers and short fibers. The long fibers are rigid and the short fibers are flexible. The long fibers form a tridimensional mat or net in the lost-circulation pathway that traps the mixture of particles and short flexible fibers to form a mudcake. The mixture of particles and blend of fibers may be added to water-based and oil-based drilling fluids. The composition, size, and concentration of each component of the mixture of particles and blend of fibers may be fine-tuned for each application.Type: ApplicationFiled: December 7, 2009Publication date: June 17, 2010Inventor: Jaleh Ghassemzadeh
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Publication number: 20100137168Abstract: Nanoemulsions have been discovered to be useful to the oil field. More particularly water-in-oil (W/O), oil-in-water (O/W) and other classes of nanoemulsions have found beneficial application in drilling, completion, well remediation and other oil and gas industry related operations. Additionally, nanoemulsions may reduce friction pressure losses, as well as reduce subsidence of solid weight material during oil and gas operations. New preparation methods for nanoemulsions have also been discovered.Type: ApplicationFiled: November 25, 2009Publication date: June 3, 2010Applicant: Baker Hughes IncorporatedInventors: Lirio Quintero, David E. Clark, Alexander John McKellar
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Publication number: 20100069268Abstract: Compositions comprising: (A) at least one surfactant of the general formula (I) (R1—[(O—(CH2)2)x1(O—CH(CH3)CH2)x2]O)kP(?O)(OH)3-k??(I) wherein the sequence of the alkyleneoxy units is arbitrary, each R1 independently represents a moiety selected from the group consisting of linear and branched C12-C22-alkyl, C12-C22-alkenyl, C12-C22-alkynyl, (C11-C21-alkyl)carbonyl, (C11-C21-alkenyl)carbonyl and (C11-C21-alkynyl)carbonyl, k represents 1 or 2 and x1 and x2 each independently represent an integer of 0 to 20, the sum of x1 and x2 being a number of 1 to 20; and (B) at least one thickener comprising at least two hydrophobic groups R2 which are linked to one another via a bridging hydrophilic group (?), wherein each R2, independently represents a moiety selected from the group consisting of C8-C32-alkyl, C8-C32-alkenyl, C8-C32-alkynyl, cycloalkyl, aryl, and aryl-C1-C32-alkyl, which in each case may have up to 3 hydroxyl substituents; wherein the composition has a pH which is viscosity-dependent.Type: ApplicationFiled: November 29, 2007Publication date: March 18, 2010Applicant: BASF SEInventors: Ulrich Steinbrenner, Günter Oetter, Uwe Ossmer, Marcus Guzmann
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Patent number: 7470419Abstract: The present application relates to granules of powdery mineral particles produced by spray granulation of a liquid slurry comprising powdery minerals particles having particle size below 10 m, at least one water-reducing agent and/or at least one binder agent and/or at least one dispersing agent. The application further relates to a method for producing such granules.Type: GrantFiled: June 16, 2005Date of Patent: December 30, 2008Assignee: Elkem ASInventor: Tor Soyland Hansen
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Patent number: 7398826Abstract: Well treatment is disclosed that includes injecting a well treatment fluid with insoluble polyol polymer such as polyvinyl alcohol (PVOH) dispersed therein, depositing the insoluble polymer in the wellbore or an adjacent formation, and thereafter dissolving the polymer by reducing salinity and/or increasing temperature conditions in the environment of the polymer deposit. The method is disclosed for filter cake formation, fluid loss control, drilling, hydraulic fracturing and fiber assisted transport, where removal of the polyol at the end of treatment or after treatment is desired. The method is also disclosed for providing dissolved polyol as a delayed breaker in crosslinked polymer viscosified systems and viscoelastic surfactant systems. Also disclosed are well treatment fluids containing insoluble amorphous or at least partially crystalline polyol, and a PVOH fiber composition wherein the fibers are stabilized from dissolution by salinity.Type: GrantFiled: December 21, 2005Date of Patent: July 15, 2008Assignee: Schlumberger Technology CorporationInventors: Ann M. W. Hoefer, Philip F. Sullivan, Golchehreh Salamat, Curtis L. Boney, Jesse C. Lee, Yiyan Chen, Dean M. Willberg, Marina Bulova, Christopher N. Fredd, Belgin Baser, Timothy L. Pope
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Patent number: 7256159Abstract: 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. The subject invention further reveals a method of lubricating a drilling bit during the drilling of a well which comprises circulating a water-based drilling mud in the vicinity of the drilling bit wherein the water-based drilling mud is comprised of an aqueous phase, and wherein the aqueous phase contains an oil soluble polymer in the form of a gel as a fluid loss reducer.Type: GrantFiled: August 23, 2006Date of Patent: August 14, 2007Assignee: Eliokem S.A.S.Inventors: Bertrand Guichard, Barry Wood, Patrick Vongphouthone
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Patent number: 7101829Abstract: 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 fluid loss reducer. The subject invention further reveals a process for preparing an oil soluble polymer fluid loss control agent comprising the steps of dissolving at least one polymer in a hydrocarbon oil to form a clear solution or a gel, adding an emulsifier to the solution or the gel, and keeping the mixture under conditions of agitation until a clear creamy mixture is obtained.Type: GrantFiled: December 17, 2003Date of Patent: September 5, 2006Assignee: Eliokem S.A.S.Inventors: Bertrand Guichard, Barry Wood, Patrick Vongphouthone
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Patent number: 7049272Abstract: The invention provides a method of treating of a well, a formation, or both, with the solids, liquids, or apparatuses, by 1) encasing said solids, liquids, or apparatuses in a water-soluble shell, 2) conveying said encased solids, liquids, or apparatuses to a predetermined location in the well, and then 3) allowing the water-soluble shell to dissolve in the aqueous phase in the wellbore. The shell is preferably made of water-soluble polyvinyl alcohol copolymers and a waterproofing agent. The shell encases a variety of solids, liquids, or combinations thereof, where said solids or liquids are useful in the treatment of the well or of the producing formation. Illustrative encased material includes soap, acid, corrosion inhibitors, chelating agents, scale inhibitors, mutual solvents, paraffin inhibitors, paraffin dissolvers, clay stabilizers, and tracer materials. The encased materials may also be apparatuses, such as a prefabricated screen completion or a prefabricated sand-pack.Type: GrantFiled: July 16, 2002Date of Patent: May 23, 2006Assignee: Santrol, Inc.Inventors: A. Richard Sinclair, S. Byron Smith
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Patent number: 7037881Abstract: The present invention generally relates to improved compositions comprising stabilized colloidal or colloidal-like phases (e.g., emulsions, aphrons) and methods of using those compositions. The compositions generally comprise an aqueous continuous phase, one or more viscosifiers, one or more surfactants, aphrons and one or more Aphron Stabilizers. The compositions of the present invention possess aphrons with significantly increased half-life and enhanced ability to seal permeable formations, and are capable of being used in high pressure applications.Type: GrantFiled: February 3, 2004Date of Patent: May 2, 2006Inventors: Frederick B. Growcock, Gerard A. Simon
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Patent number: 6855671Abstract: A drilling system fluid and method of using same. The drilling system fluid comprises water as a continuous phase, an amount of a multivalent metal, and a quantity of a water soluble polyacrylamide copolymer having a charge density of at least about 1%. In a preferred embodiment, the fluid also comprises a second amount of a monovalent salt effective to increase gas hydrate suppression and decrease density when compared to a fluid consisting essentially of only a divalent salt in the absence of the monovalent salt.Type: GrantFiled: March 11, 2002Date of Patent: February 15, 2005Assignee: Baker Hughes IncorporatedInventors: James E. Norfleet, Michael A. Jarrett, Patricia A. Potts, Tao Xiang, Frank E. Evans
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Patent number: 6818597Abstract: Liquid water soluble polymer suspensions in non-aqueous solvents are extremely stable over long periods of time with minimum separation of the solvent and no hard packing of the dispersed water soluble polymer. The suspensions enable a user to rapidly add the suspension to water, being mixed at low speeds, without the formation of lumps or fisheyes and without generating fugitive dust in the process. The suspensions are environmentally safe and biodegradable. Unlike many other liquid polymer suspensions, the suspensions exhibit minimal oil or grease upon dilution. They contain no surfactants that can add to the oil and grease determination. The suspensions and the fluids produced by diluting the fluids to a working concentration of the water soluble polymer exhibit low toxicity to marine organisms and to humans. The suspensions can be manufactured from ingredients suitable for use in personal care applications such as cosmetics, shampoos and the like.Type: GrantFiled: January 26, 2001Date of Patent: November 16, 2004Assignee: Benchmark Research & Technology, Inc.Inventor: William Franklin Harris
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Patent number: 6710019Abstract: The present invention relates to a wellbore fluid comprising a particulate material composed of the reaction product of A) one or more water soluble organic compound having possessing a molecular weight of less than 30,000 and possessing at least two hydroxyl groups and B) any other organic compound(s) capable of forming acetal or hemiacetal cross-links with the hydroxyl groups of compound A. The invention relates also to the specific particulate material itself and to applications of the wellbore fluid of the invention for well processes such as drilling, under-reaming, completing, working over, sealing loss zones, sealing fractures, sealing cavities or other very high permeability conduits in a rock formation, or hydraulic fracturing to stimulate a hydrocarbon-producing zone.Type: GrantFiled: June 1, 2001Date of Patent: March 23, 2004Inventors: Christopher Alan Sawdon, David Antony Ballard
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Patent number: 6702044Abstract: Methods of consolidating formations or forming chemical casing or both while drilling are provided. One method of the invention comprises drilling a well bore with a drilling fluid comprised of water, a polymeric cationic catalyst which is adsorbed on weak zones or formations formed of unconsolidated clays, shale, sand stone and the like, a water soluble or dispersible polymer which is cross-linked by a thermoset resin and causes the resin to be hard and tough when cured, a particulate curable solid thermoset resin, a water soluble thermoset resin, and a delayed dispersible acid catalyst for curing the solid and water soluble resins. The drilling fluid forms a filter cake on the walls of the well bore that cures and consolidates the unconsolidated weak zones and formations penetrated by the well bore so that sloughing is prevented and forms a hard and tough cross-linked chemical casing on the walls of the well bore.Type: GrantFiled: June 13, 2002Date of Patent: March 9, 2004Assignee: Halliburton Energy Services, Inc.Inventors: B. Raghava Reddy, Larry S. Eoff, Donald L. Whitfill, J. Michael Wilson, Denise Berryhill, Russel M. Fitzgerald, Thomas E. Becker, Jimmie D. Weaver
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Publication number: 20030230431Abstract: Methods of consolidating formations or forming chemical casing or both while drilling are provided. One method of the invention comprises drilling a well bore with a drilling fluid comprised of water, a polymeric cationic catalyst which is adsorbed on weak zones or formations formed of unconsolidated clays, shale, sand stone and the like, a water soluble or dispersible polymer which is cross-linked by a thermoset resin and causes the resin to be hard and tough when cured, a particulate curable solid thermoset resin, a water soluble thermoset resin, and a delayed dispersible acid catalyst for curing the solid and water soluble resins. The drilling fluid forms a filter cake on the walls of the well bore that cures and consolidates the unconsolidated weak zones and formations penetrated by the well bore so that sloughing is prevented and forms a hard and tough cross-linked chemical casing on the walls of the well bore.Type: ApplicationFiled: June 13, 2002Publication date: December 18, 2003Inventors: B. Raghava Reddy, Larry S. Eoff, Donald L. Whitfill, J. Michael Wilson, Denise Berryhill, Russel M. Fitzgerald, Thomas E. Becker, Jimmie D. Weaver
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Patent number: 6492305Abstract: Selectively cross-linked starches are disclosed that are useful as fluid loss control additives in subterranean treatment fluids comprising starches that cross-linked to a Brabender peak viscosity of about 800 to about 1250 Brabender units after about 40 to about 70 minutes at about 92° C. and provide good fluid loss control over a temperature range of from about 20° C. to about 160° C. (68° F. to 320° F.).Type: GrantFiled: January 24, 2001Date of Patent: December 10, 2002Assignees: CP Kelco U.S., Inc., National Starch and Chemical Investment Holding CorporationInventors: Thomas R. Sifferman, John M. Swazey, C. Bryan Skaggs, Nina Nguyen, Daniel B. Solarek
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Patent number: 6309455Abstract: The present invention comprises a stable hydrocolloid composition in which preferably welan gum is uniformly dispersed in a superplasticizer solution such as sulfonated naphthalene, sulfonated melamine, modified lignosulfate, their derivatives and mixtures thereof. The solution is wet milled to form an extremely fine particle size distribution of the gum. The composition is rapidly hydratable and useful as a stabilizing additive in many cement and drilling fluid applications.Type: GrantFiled: August 21, 2000Date of Patent: October 30, 2001Assignee: CP Kelco U.S., Inc.Inventors: Bryan Skaggs, Harold Dial, Walter Rakitsky
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Publication number: 20010005709Abstract: Selectively cross-linked starches are disclosed that are useful as fluid loss control additives in subterranean treatment fluids comprising starches that are cross-linked to a Brabender peak viscosity of about 800 to about 1250 Brabender units after about 40 to about 70 minutes at about 92° C. and provide good fluid loss control over a temperature range of from about 20° C. to about 160° C. (68° F. to 320° F.).Type: ApplicationFiled: January 24, 2001Publication date: June 28, 2001Inventors: Thomas R. Sifferman, John M. Swazey, C. Bryan Skaggs, Nina Nguyen, Daniel B. Solarek
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Patent number: 6180571Abstract: Selectively cross-linked starches are disclosed that are useful as fluid loss control additives in subterranean treatment fluids comprising starches that are cross-linked to a Brabender peak viscosity of about 800 to about 1250 Brabender units after about 40 to about 70 minutes at about 92° C. and provide good fluid loss control over a temperature range of from about 20° C. to about 160° C. (68° F. to 320° F.).Type: GrantFiled: July 28, 1997Date of Patent: January 30, 2001Assignees: Monsanto Company, National Starch and Chemical Investment Holding CorporationInventors: Thomas R. Sifferman, John M. Swazey, C. Bryan Skaggs, Nina Nguyen, Daniel B. Solarek
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Patent number: 6106603Abstract: The present invention comprises a stable hydrocolloid composition in which preferably welan gum is uniformly dispersed in a superplasticizer solution such as sulfonated naphthalene, sulfonated melamine, modified lignosulfate, their derivatives and solution thereof. The mixture is wet milled to form an extremely fine particle size, from about 3 microns to about 500 microns distribution of the gum. The composition is rapidly hydratable and useful as a stabilizing additive in many cement and drilling fluid applications.Type: GrantFiled: April 16, 1998Date of Patent: August 22, 2000Assignee: Pharmacia CorporationInventors: Bryan Skaggs, Harold Dial, Walter Rakitsky
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Patent number: 5858928Abstract: The invention relates to a gel made of apolar medium including:an apolar medium,a "multichain" liquid surface-active agent in acidic form, soluble or dispersible in the said apolar medium,an agent for neutralizing the said "multichain" surface-active agent,from 0.2 to 5 molecules of water per molecule of "multichain" surface-active agent,optionally at least one emulsifying agent and/or a solid filler which is soluble or insoluble in the apolar medium.This gel may be employed for the formulation of water-based drilling fluids.Type: GrantFiled: November 22, 1995Date of Patent: January 12, 1999Assignee: Rhone-Poulenc ChimieInventors: Daniel Aubert, Laurent Frouin, Mikel Morvan, Marie-Madeleine Vincent
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Patent number: 5654261Abstract: A method and use for a dry composition comprising a mixture of water-soluble polymer and an aluminum citrate preparation is disclosed. The polymer is capable of cross-linking in the presence of water and aluminum ions. Any water-soluble polymer known to the art is suitable. Cross-linked polymer forms a gel in highly permeable, watered-out regions of oil-containing rock, allowing for increased oil recovery and decreased water use and recycling.Type: GrantFiled: July 26, 1996Date of Patent: August 5, 1997Assignee: Tiorco, Inc.Inventor: Julie E. Smith
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Patent number: 5629270Abstract: Oil-base drilling fluids containing a non-sulfonated polymer and/or a non-organophilic clay maintain desirable rheological properties at elevated temperatures.Type: GrantFiled: June 30, 1994Date of Patent: May 13, 1997Assignee: Union Oil Company of CaliforniaInventor: Donald C. Van Slyke
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Patent number: 5360787Abstract: A dispersant for drilling fluids, spacer fluids, cement slurries, completion fluids and mixtures of drilling fluids and cement slurries used for drilling and cementing subterranean wells.Type: GrantFiled: January 28, 1992Date of Patent: November 1, 1994Assignee: Atlantic Richfield CompanyInventors: James B. Bloys, William N. Wilson, Edward Malachosky, Roger D. Bradshaw, Roger A. Grey
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Patent number: 5211250Abstract: A method of stabilizing a wellbore being drilled through both shale and sandstone zones. A shale stabilizing agent and finely divided particulate material are combined in a water based drilling fluid to provide the stabilization.Type: GrantFiled: January 21, 1992Date of Patent: May 18, 1993Assignee: Conoco Inc.Inventors: Edwin Kubena, Jr., Lee E. Whitebay, James A. Wingrave