Carbohydrate Is Cellulose Or Derivative Thereof Patents (Class 507/112)
  • Publication number: 20100093564
    Abstract: Aqueous fluids comprising polysaccharide, dissolved salt, and borate anions. The fluids are useful, for example, as a drilling fluid.
    Type: Application
    Filed: December 21, 2007
    Publication date: April 15, 2010
    Inventors: Robert W. Hunter, Jean-Marie Ruckebusch, Adriana Paiva
  • Patent number: 7648946
    Abstract: Methods of degrading filter cakes in subterranean formations are provided. An example of a method is a method of drilling a well bore in a subterranean formation. Another example of a method is a method of degrading a filter cake in a subterranean formation, the filter cake comprising an inorganic portion and an organic portion, and having been established in the formation by a well drill-in and servicing fluid that comprises a delayed-release acid component. An example of a composition is a well drill-in and servicing fluid.
    Type: Grant
    Filed: November 17, 2004
    Date of Patent: January 19, 2010
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Trinidad Munoz, Jr.
  • Publication number: 20090291862
    Abstract: 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: Application
    Filed: August 5, 2009
    Publication date: November 26, 2009
    Applicant: INTEVEP, S.A.
    Inventors: Sarkis Kakadjian, Jacques Reinaldo Gabay, Gerardo Alonso Sanchez
  • Patent number: 7622427
    Abstract: 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: Grant
    Filed: February 21, 2007
    Date of Patent: November 24, 2009
    Assignee: Hercules Incorporated
    Inventors: Arjun C. Sau, Mohand Melbouci
  • Patent number: 7612021
    Abstract: 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: Grant
    Filed: August 24, 2007
    Date of Patent: November 3, 2009
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Jiten Chatterji, Bobby King, Darrell C. Brenneis
  • Publication number: 20090170730
    Abstract: The present disclosure relates to the compositions of a water-based silicate drilling fluid comprising: (1) alkali metal silicates; (2) cationic polyacrylamide; (3) a lubricant composition; and (4) other conventional drilling fluid additives. The lubricant composition comprises a lubricating effective amount of a carrier oil and one or more lubricants selected from lecithins, sulfurized vegetable and/or lard oils or modified castor oil.
    Type: Application
    Filed: December 8, 2008
    Publication date: July 2, 2009
    Inventors: Anming Wu, Xing Yan
  • Patent number: 7553800
    Abstract: Improved in-situ filter cake degradation compositions for use in subterranean formations, well drill-in and servicing fluids including such in-situ filter cake degradation compositions, and methods of using such in-situ filter cake degradation compositions and well drill-in and servicing fluids in subterranean operations are provided. An example of a method is a method for forming a self-degrading filter cake in a subterranean formation. Another example of a method is a method of drilling a well bore in a subterranean formation. Another example of a method is a method of degrading a filter cake in a subterranean formation. An example of a composition is a well drill-in and servicing fluid. Another example of a composition is an in-situ filter cake degradation composition.
    Type: Grant
    Filed: November 17, 2004
    Date of Patent: June 30, 2009
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Trinidad Munoz, Jr.
  • Patent number: 7541316
    Abstract: 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: Grant
    Filed: February 4, 2005
    Date of Patent: June 2, 2009
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Jody L. Maresh
  • Patent number: 7528095
    Abstract: Methods of improving the thermal stability of an aqueous wellbore treatment fluid are provided. The wellbore treatment fluid comprises 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. It may be circulated through the wellbore without being concerned that it could become unstable due to exposure to relatively high downhole temperatures.
    Type: Grant
    Filed: February 4, 2005
    Date of Patent: May 5, 2009
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Jody L. Maresh
  • Publication number: 20090054270
    Abstract: Hydrocolloid gum compositions, methods of forming the same, and products formed therefrom. The composition may comprise a hydrocolloid gum, such as xanthan gum, a cellulose thickener, and a solvent component. The solvent component may comprise a lactate ester and, optionally, an alkylene glycol alkyl ether.
    Type: Application
    Filed: August 20, 2008
    Publication date: February 26, 2009
    Applicant: Archer-Daniels-Midalnd Company
    Inventors: Denise L. Williams, Michael L. Rambo, Peter J. Olney, Neil W. Camp, Bruce R. Sebree
  • Publication number: 20080300150
    Abstract: A method of servicing a wellbore comprising introducing to the wellbore a wellbore servicing fluid comprising an additive composition comprising a polysaccharide having carboxylate and sulfonate groups. A method of servicing a wellbore comprising preparing at the well site an additive composition comprising a polysaccharide having carboxylate and sulfonate groups,introducing the additive composition into a wellbore servicing fluid, and placing the wellbore servicing fluid into a subterranean formation. A method of preparing a wellbore servicing fluid comprising contacting a polysaccharide composition with an oxidizing agent to form an oxidized polysaccharide, and contacting the oxidized polysaccharide with a sulfonating agent to form a carboxylated sulfonated polysaccharide, and contacting the carboxylated sulfonated polysaccharide with a wellbore servicing fluid.
    Type: Application
    Filed: May 30, 2007
    Publication date: December 4, 2008
    Applicant: Halliburton Energy Services, Inc.
    Inventors: B. Raghava Reddy, Anindya Ghosh, Russell M. Fitzgerald
  • Patent number: 7449430
    Abstract: 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: Grant
    Filed: June 23, 2006
    Date of Patent: November 11, 2008
    Assignee: Eliokem S.A.S.
    Inventors: Bertrand Guichard, Barry Wood, Patrick Vongphouthone
  • Patent number: 7427582
    Abstract: A wellbore fluid including a peroxide degradable polymer and an encapsulated peroxide source. The peroxide degradable polymer may be a polysaccharide. The peroxide source may include an inorganic peroxide, including zinc and alkaline earth metal peroxides, such as magnesium peroxide. The encapsulating material may be a polymer, including enteric polymers. The release of peroxide, from peroxide sources generally, can be controlled by means of pH such that peroxide source can be activated, and peroxide released, by a change in pH. In a wellbore, this pH change can be effected by using produced fluids to lower the pH of a more basic wellbore fluid.
    Type: Grant
    Filed: November 17, 2004
    Date of Patent: September 23, 2008
    Assignee: M-I L.L.C.
    Inventors: David A Ballard, Christopher A Sawdon, Trevor G Jappy
  • Patent number: 7393407
    Abstract: The present invention relates to a slurry containing water, amorphous silica panicles having a particle size less than 1 micron and silica flour with a particle size between 2-200 microns. In order to stablize the slurry, the slurry contains a polysaccharide. The invention further relates to a method for the production of a slurry containing water, amorphous silica having a particle size below 1 micron, and silica flour with a particle size between 2-200 microns, where a polysaccharide is added to a slurry of water and amorphous silica, whereafter the silica flour is mixed into the slurry of amorphous silica.
    Type: Grant
    Filed: April 24, 2003
    Date of Patent: July 1, 2008
    Assignee: Elkem ASA
    Inventors: Eldar O Dingsoyr, Magne Dastol, Cor Oldenziel, Bjorn Vassoy
  • Patent number: 7384892
    Abstract: A water-based drilling fluid composition includes water and at least one rheology modifier and/or fluid loss control agent, and at least one other ingredient of polymeric additive, inorganic salts, dispersants, shale stabilizers, weighting agents, or finely divided clay particles, depending upon the desired attributes, wherein the rheology modifier and/or the fluid loss control agent comprises carboxymethylated raw cotton linters (CM-RCL) made from the baled raw cotton linters or comminuted raw cotton linters with increased bulk density.
    Type: Grant
    Filed: July 22, 2004
    Date of Patent: June 10, 2008
    Assignee: Hercules Incorporated
    Inventors: Mohand Melbouci, Arjun C. Sau
  • Patent number: 7323434
    Abstract: An electropositive and water-based production well treating fluid system exhibits electropositivity by using a cationic viscosifier meanwhile matched with a cationic fluid loss additive and, optionally, contains a mud-building agent, an electrical stabilizing agent, a colloid-stabilizing agent, lubricant, an oil layer protective agent and/or a weighting agent. The electropositive production well treating fluid can beffer solve the contradiction of technical requirements between “treating fluid stability” and “bore hole stability”, and features a strong ability to inhibit the dispersion of clay, a good effect of protecting oil-gas reservoirs, fast drilling speeds, regular shape of bore holes and good resistance to salt.
    Type: Grant
    Filed: November 21, 2003
    Date of Patent: January 29, 2008
    Assignees: China Petroleum & Chemical Corporation, Exploration & Production Research Insitute, SINOPEC, China Petro-Chemical Corporation Shengli Petroleum Administrative Bureau
    Inventors: Changming Su, Rushan Liu, Weiping Xu, Zengchen Guan, Peizhi Yu, Xiushan Liu, Jiafen Li, Baoyu Guo, Yingchun Cui, Caixuan Guo, Jing Li
  • Patent number: 7304019
    Abstract: 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: Grant
    Filed: May 31, 2006
    Date of Patent: December 4, 2007
    Assignee: Schlumberger Technology Corporation
    Inventors: Lijun Lin, Alejandro Pena, Golchehreh Salamat, Michael D. Parris, Geoff Robinson
  • Patent number: 7214647
    Abstract: The invention provides well drilling and servicing fluids, and methods of drilling, completing, or working over a well therewith, preferred fluids comprise an aqueous liquid, a water soluble polymer viscosifier (preferably xanthan gum), a polymeric fluid loss control additive (preferably a partially depolymerized partially crosslinked hydroxyalkyl ether derivative of starch or a hydroxyalkyl ether derivative of a partially crosslinked and partially depolymerized starch), a bridging agent comprising a particulate calcined magnesia that has an Activity Index greater than about 800 seconds, and an additive selected from the group consisting of citric acid, alkali metal salts of citric acid, ammonium citrate, and mixtures thereof in an amount sufficient to increase the low shear rate viscosity of the fluids, preferably from about 0.05–5 ppb, most preferably from about 0.15–3 ppb.
    Type: Grant
    Filed: December 14, 2004
    Date of Patent: May 8, 2007
    Assignee: Texas United Chemical Company, LLC.
    Inventors: James W. Dobson, Jr., Kim O. Tresco, Jorge M. Fernandez
  • Patent number: 7211546
    Abstract: The invention provides well drilling and servicing fluids, and methods of drilling, completing, or working over a well therewith, preferred fluids comprise an aqueous liquid, a water soluble polymer viscosifier (preferably xanthan gum), a polymeric fluid loss control additive (preferably a partially depolymerized partially crosslinked hydroxyalkyl ether derivative of starch or a hydroxyalkyl ether derivative of a partially crosslinked and partially depolymerized starch), a bridging agent comprising a particulate calcined magnesia that has an Activity Index greater than about 800 seconds, and citric acid in an amount sufficient to increase the low shear rate viscosity of the fluids. The invention further provides a method of increasing the low shear rate viscosity of fluids which contain a water soluble polymer and a calcined magnesia bridging agent which has an Activity Index greater than about 800 seconds.
    Type: Grant
    Filed: July 29, 2004
    Date of Patent: May 1, 2007
    Assignee: Texas United Chemical Company, LLC.
    Inventors: James W. Dobson, Jr., Kim O. Tresco, Jorge M. Fernandez
  • Patent number: 7199084
    Abstract: 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: Grant
    Filed: March 21, 2002
    Date of Patent: April 3, 2007
    Assignee: Schlumberger Technology Corporation
    Inventors: Michael Parris, Geoff Robinson
  • Patent number: 7199083
    Abstract: Self-generating foamed fluids for circulation through a well during drilling operations and methods for circulating such self-generating foamed drilling fluids are provided for. The drilling fluid comprises an aqueous solvent, a polymer, a surfactant, a first foam generating agent, and a second foam generating agent. The first and second foam generating agents react to generate a gas within the drilling fluid and thereby to foam the drilling fluid. Preferably, the foam generating agents are selected such that they react to generate carbon dioxide. Preferably a base fluid comprising excess amounts of only one of the foam generating agents is pumped into the drill string using a hydraulic pump. The other foam generating agent then is injected in a controlled manner downstream of the circulation pump such that the drilling fluid is foamed after being pumped for circulation through the well. The novel drilling fluids preferably have a density of from about 5.8 lb/gal to about 0.
    Type: Grant
    Filed: December 6, 2002
    Date of Patent: April 3, 2007
    Assignee: Self Generating Foam Incoporated
    Inventor: Manuel Legendre Zevallos
  • Patent number: 7131492
    Abstract: This invention relates to divinyl sulfone crosslinking agents, viscosified treatment fluids, and methods of using these compositions in applications wherein viscosified treatment fluids may be used. In one embodiment, this invention provides a method of treating a portion of a subterranean formation comprising: providing a viscosified treatment fluid that comprises an aqueous base fluid and a crosslinked gelling agent, the crosslinked gelling agent comprising at least one alkyl sulfone bridge, and treating the portion of the subterranean formation.
    Type: Grant
    Filed: October 20, 2004
    Date of Patent: November 7, 2006
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Robert M. Kriegel
  • Patent number: 7067461
    Abstract: A drilling fluid additive is provided wherein the additive is manufactured by a method comprised of admixing graphite with at least one carrier such as a polypropylene glycol or oil to create a suspended mixture, and allowing the surface of the graphite to be pre-wet with the carrier prior to adding the mixture to a drilling fluid.
    Type: Grant
    Filed: September 23, 2003
    Date of Patent: June 27, 2006
    Assignee: Alpine Mud Products Corp.
    Inventor: Jerry Rayborn
  • Patent number: 7060660
    Abstract: A drilling fluid additive system is provided wherein the system comprises: a drilling fluid additive comprising talc, graphite and at least one carrier such as a glycol; and hydrophilic clay, a pH controller, a fluid loss controller, and at least one dispersant.
    Type: Grant
    Filed: September 23, 2003
    Date of Patent: June 13, 2006
    Assignee: Alpine Mud Products Corp
    Inventor: Jerry Rayborn
  • Patent number: 7050166
    Abstract: The invention concerns a method for determining the particle size distribution (PSD) of bridging agents in fluids, particularly aqueous fluids used in hydrocarbon recovery such as drilling fluids, drill-in fluids, completion fluids, and the like. It was discovered that the PSD could be selectively determined for calcium carbonate as a bridging agent because it auto-fluoresces. The method is reproducible and is not bothered by the presence of other particles such as drill solids which interferes with conventional methods, for instance, light-scattering techniques. The light used to fluoresce the bridging agent may be filtered to a particular frequency if there are other components present that fluoresce. Flow cytometry is another technique that could be used to implement the invention.
    Type: Grant
    Filed: October 30, 2002
    Date of Patent: May 23, 2006
    Assignee: Baker Hughes Incorporated
    Inventors: Ronald G. Bland, Tom A. Jones
  • Patent number: 7018955
    Abstract: Disclosed are drilling fluids that include carboxyalkylated corn hulls in an amount effective to inhibit fluid loss from a wellbore formation. The carboxyalkylated corn hulls are heat stable and surprisingly effective at inhibiting fluid loss. Also disclosed are a drilling apparatus and a drilling process.
    Type: Grant
    Filed: January 15, 2003
    Date of Patent: March 28, 2006
    Assignee: Grain Processing Corporation
    Inventors: Kevin H. Schilling, Michael Riley, Roger E. McPherson
  • Patent number: 6908886
    Abstract: An annular fluid or packer fluid, and methods of making the same, that includes a water-miscible solvent, a viscosifying additive, a crosslinking agent, a crosslinking inhibitor having the facility to inhibit crosslinking between the viscosifying additive and the crosslinking agent, and an initiating agent having the facility to overcome an action of the crosslinking inhibitor and to initiate crosslinking between the viscosifying additive and the crosslinking agent, is shown and described. The fluid has a thermal conductivity of no more than about 0.25 btu/(hr·ft·° F.) and a potential to substantially increase its viscosity upon sitting for a selected period of time.
    Type: Grant
    Filed: January 9, 2003
    Date of Patent: June 21, 2005
    Assignee: M-I L.L.C.
    Inventors: Andrew G. K. Jones, Bethicia B. Prasek, Robert L. Horton
  • Patent number: 6884760
    Abstract: The invention relates to water based wellbore fluids used during a hydrocarbon recovery process, such as drilling, fracturing, gravel packing and wellbore workover. According to the present invention, said wellbore fluid comprises a fluid loss additive and a bridging material that are hydrophobic in nature, hydrophobically modified or oil wettable. The wellbore fluid generates an active filter cake that once formed, is impermeable to an aqueous phase, thus reducing fluid loss and ensuring reduced damage to the formation, yet simultaneously is permeable to the back flow of hydrocarbons during a hydrocarbon recovery process.
    Type: Grant
    Filed: June 13, 2000
    Date of Patent: April 26, 2005
    Assignee: M-I, L.L.C.
    Inventors: Fabien J. Brand, Andrew Bradbury
  • Patent number: 6861392
    Abstract: A method and composition is provided for sealing a subterranean zone penetrated by a well bore to restore lost circulation. In one embodiment, the composition comprises a pellet comprising a mixture of lost circulation materials (LCMs).
    Type: Grant
    Filed: March 26, 2002
    Date of Patent: March 1, 2005
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Mano Shaarpour
  • Patent number: 6835697
    Abstract: A method to significantly reduce mounding on the seafloor near oil drilling operations comprising the steps of: mixing drilling fluids with organic contaminates in a high shear mixer; adding a solidification agent which expands when hydrated and electrolytically attracts said organic contaminates to its surface; adding a cellulosic additive in an amount between 1 and 50 wt % based on the amount of said organic contaminate in the drilling fluid forming a mixture; adding a cell transport agent in an amount between 0.5 wt % and 10 wt % based on the amount of said organic contaminate in the drilling fluid, wherein said cell transport agent is capable of transporting large organic molecules through cell walls and neutralizing said mixture to a pH of between 7 and 8 to said mixture; and mixing at a high shear rate until said mixture forms a fine powder, dispersing said fine powder into the sea.
    Type: Grant
    Filed: May 3, 2002
    Date of Patent: December 28, 2004
    Inventor: James Richard Von Krosigk
  • Patent number: 6825152
    Abstract: A dense drilling fluid additive used to control lost circulation, fluid loss and/or seepage loss of drilling fluid during drilling operations is disclosed. Such additive is formed from ground base materials, such as inorganic matter, and may be used to manage the rheological properties of drilling fluid.
    Type: Grant
    Filed: March 13, 2001
    Date of Patent: November 30, 2004
    Assignee: Grinding & Sizing Co., Inc.
    Inventor: Ban D. Green
  • Patent number: 6818597
    Abstract: 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: Grant
    Filed: January 26, 2001
    Date of Patent: November 16, 2004
    Assignee: Benchmark Research & Technology, Inc.
    Inventor: William Franklin Harris
  • Patent number: 6806231
    Abstract: Disclosed are drilling fluids suitable for use in connection with oil well drilling. The drilling fluids of the invention include in one embodiment a liquid base, an alkyl glucoside, such as methyl glucoside, and a borehole stability agent that includes a maltodextrin, a carboxyalkyl starch, a hemicellulose-containing material, or a mixture of the foregoing. In another embodiment, the drilling fluid includes a liquid base and desugared molasses solids, preferably in combination with an alkyl glucoside and more preferably in further combination with one of the aforementioned borehole stability agents. The drilling fluids of the invention surprisingly have a reduced tendency to swell shale as compared with known drilling fluids. Also disclosed are a drilling apparatus and process. The drilling apparatus includes a drill string, which may be conventional, that is fluidically coupled to a source of drilling fluid, the source of drilling fluid including the drilling fluid of the invention.
    Type: Grant
    Filed: January 3, 2003
    Date of Patent: October 19, 2004
    Assignee: Grain Processing Corporation
    Inventors: Kevin H. Schilling, Michael Riley, David F. Cali
  • Patent number: 6800593
    Abstract: Disclosed is a hydrophilic, water soluble polymer concentrate for addition to aqueous liquids to enhance the properties thereof, particularly to increase the viscosity or decrease the fluid loss of well drilling and servicing fluids, the concentrate comprising a hydrophobic, water insoluble liquid, an organophilic clay suspension agent, the water soluble polymer, and a stabilizing agent comprising one or more acids in an amount from about 0.001% to about 1.5%, one or more anionic surfactants in an amount from about 0.001% to about 1.0%, one or more nonionic surfactants in an amount from 0.001% to about 0.625% and, from about 0% to about 0.75% of one or more water soluble organic liquids, wherein the total concentration of the stabilizing agent is from about 0.1% to about 2.5%, these percentages being based on the weight of the concentrate.
    Type: Grant
    Filed: June 19, 2002
    Date of Patent: October 5, 2004
    Assignee: Texas United Chemical Company, LLC.
    Inventors: James W. Dobson, Jr., Shauna Leigh Hayden, Carolina Trejo Rangel
  • Patent number: 6794340
    Abstract: A method is disclosed for drilling a wellbore employing a drilling fluid providing the advantages of easy pumpability of a low viscosity fluid with the drill cuttings suspension capability of a highly viscous fluid. The viscosity of the fluid is also easily and quickly adjustable so that the fluid rheology may be adapted during drilling as the subterranean conditions change. These advantages are obtained by including in said fluid a reversibly crosslinkable polymer and an encapsulated crosslink activator. The crosslink activator causes crosslinking after the fluid is in the wellbore. The crosslinking is reversed at the well surface to reduce the viscosity of the fluid to enable the drill cuttings to be easily removed. Crosslink activator is added back to the fluid and the fluid is returned to the borehole. The amount of crosslink activator and/or crosslinkable polymer may be adjusted in the fluid to change the fluid rheology to conform the fluid to changes in the well conditions as monitored real time.
    Type: Grant
    Filed: June 25, 2002
    Date of Patent: September 21, 2004
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Philip D. Nguyen, Phillip C. Harris, Thomas E. Becker
  • Publication number: 20040168802
    Abstract: Methods of cementing in subterranean formations, cement compositions, and methods for making the compositions are provided. A cement slurry is passed into a subterranean formation, and a swelling agent is passed into the subterranean formation to reduce an amount of water flowing into the cement slurry. The swelling agent may be combined with a carrier fluid before being displaced into the subterranean formation. Alternatively, the swelling agent may be pre-mixed with the cement slurry to form a new cement composition, followed by displacing the cement composition into the subterranean formation. The swelling agent is present in an amount effective to, upon absorption of water and swelling to form a gel mass, substantially block the flow path of the water into the cement composition or reduce losses to low pore pressure intervals, thereby preventing the integrity of the cement composition from being compromised or lost to voidage, fractures, fissures, etc.
    Type: Application
    Filed: February 27, 2003
    Publication date: September 2, 2004
    Inventors: Prentice G. Creel, Charles L. Boatman, Richard H. Tate, Eldon Dwyann Dalrymple, Stephen P. Luscombe, John L. Eubank
  • Patent number: 6784140
    Abstract: A method of treating a well including injecting a thermally stable, substantially water-free well-treating fluid into the well, wherein the well-treating fluid comprises a polymer, a glycol compound, and a salt is disclosed. In another embodiment, a thermally stable, substantially water-free well fluid including a polymer, a diol compound, and a salt is disclosed.
    Type: Grant
    Filed: August 15, 2001
    Date of Patent: August 31, 2004
    Assignee: M-I L.L.C.
    Inventors: David P. Kippie, William E. Foxenberg
  • Patent number: 6774089
    Abstract: A drilling fluid additive is provided wherein the additive is manufactured by a method comprised of admixing colloidal solids such as talc with a combination of oil and glycol or cellulose to create a suspended mixture to thereby allow the colloidal solids to be pre-wet, treated or coated with the oil/glycol combination or the cellulose; and then admixing copolymer beads to the suspended mixture.
    Type: Grant
    Filed: July 17, 2002
    Date of Patent: August 10, 2004
    Assignee: Alpine Mud Products Corporation
    Inventor: Jerry Rayborn
  • Publication number: 20040138070
    Abstract: An annular fluid or packer fluid, and methods of making the same, that includes a water-miscible solvent, a viscosifying additive, a crosslinking agent, a crosslinking inhibitor having the facility to inhibit crosslinking between the viscosifying additive and the crosslinking agent, and an initiating agent having the facility to overcome an action of the crosslinking inhibitor and to initiate crosslinking between the viscosifying additive and the crosslinking agent, is shown and described. The fluid has a thermal conductivity of no more than about 0.25 btu/(hr·ft·° F.) and a potential to substantially increase its viscosity upon sitting for a selected period of time.
    Type: Application
    Filed: January 9, 2003
    Publication date: July 15, 2004
    Inventors: Andrew G.K. Jones, Bethicia B. Prasek, Robert L. Horton
  • Patent number: 6737384
    Abstract: A drilling fluid additive system is provided wherein the system is manufactured by a method comprised of admixing colloidal solids such as talc with a carrier such as oils and glycols or talc with cellulose to create a suspended mixture to thereby allow the colloidal solids to be pre-wet or coated with the carrier; and then admixing copolymer beads to the suspended mixture to allow the beads to be pre-wet or coated with the carrier; and then adding the suspended mixture with a mixture comprised of hydrophilic clay, a pH controller, a fluid loss controller, and a dispersant.
    Type: Grant
    Filed: July 17, 2002
    Date of Patent: May 18, 2004
    Assignee: Alpine Mud Products Corporation
    Inventor: Jerry Rayborn
  • Patent number: 6620769
    Abstract: This invention provides a water-free oil based fluid polymer suspension composition for use as a rheology modifier and fluid loss reducer in oil or gas well servicing fluids. It has been found that by using white medicinal oil as a carrier, high solids content and environmental friendly anhydrous fluidized polymer suspensions of xanthan gum, cellulose ethers, guar gum and derivatives thereof can be prepared. More specifically, in one aspect, an oil-based fluid polymer suspension (FPS) composition for use in oil or gas well servicing fluids is preferred containing: a) a hydrophilic polymer, b) an organophilic clay, c) a stabilizer, and d) a white medicinal oil having selected properties.
    Type: Grant
    Filed: November 21, 2000
    Date of Patent: September 16, 2003
    Assignee: Hercules Incorporated
    Inventors: Herbert L. Juppe, Robert P. Marchant, Mohand Melbouci
  • Patent number: 6586587
    Abstract: The invention relates to a ligand-modified cellulose product comprising cellulose ether, calcium salt and at least one ligand as a chelating agent. The product can be used e.g. in drilling fluids.
    Type: Grant
    Filed: March 4, 2002
    Date of Patent: July 1, 2003
    Assignee: Noviant Oy
    Inventors: Antonius F. Maas, Ulla Urpilainen, Oliver Ruppert
  • Patent number: 6518223
    Abstract: Disclosed are drilling fluids suitable for use in connection with oil well drilling. The drilling fluids of the invention include in one embodiment a liquid base, an alkyl glucoside, such as methyl glucoside, and a borehole stability agent that includes a maltodextrin, a carboxyalkyl starch, a hemicellulose-containing material, or a mixture of the foregoing. In another embodiment, the drilling fluid includes a liquid base and desugared molasses solids, preferably in combination with an alkyl glucoside and more preferably in further combination with one of the aforementioned borehole stability agents. The drilling fluids of the invention surprisingly have a reduced tendency to swell shale as compared with known drilling fluids. Also disclosed are a drilling apparatus and process. The drilling apparatus includes a drill string, which may be conventional, that is fluidically coupled to a source of drilling fluid, the source of drilling fluid including the drilling fluid of the invention.
    Type: Grant
    Filed: August 28, 2001
    Date of Patent: February 11, 2003
    Assignee: Grain Processing Corporation
    Inventors: Kevin H. Schilling, Michael Riley, David F. Cali
  • Patent number: 6495493
    Abstract: Water-based drilling fluid comprising: (a) water, (b) at least one biopolymer of the polysaccharide type, (c) at least one filtrate reducer selected from starches with different cross-linking degrees in presence of cellulose microfibers, (d) optionally a hydrosoluble polymeric surface-active agent having an HLB from 10 to 16, preferably from 11 to 14.
    Type: Grant
    Filed: November 27, 2000
    Date of Patent: December 17, 2002
    Assignees: ENI S.p.A., Enitechnologie S.p.A.
    Inventors: Sandra Cobianco, Martin Bartosek, Alberto Guarneri
  • Patent number: 6451743
    Abstract: A new stable liquid suspension containing non-soluble particles dispersed in a non-aqueous liquid medium having a concentration of a suspension aid and a method of making and use thereof.
    Type: Grant
    Filed: November 14, 2000
    Date of Patent: September 17, 2002
    Assignee: Chevron Phillips Chemical Company LP
    Inventor: Kelly B. Fox
  • Patent number: 6348436
    Abstract: The present invention relates to a drilling fluid comprising cellulose nanofibrils comprising at least 80% of cells with primary walls and charged with carboxylic acids and with acidic polysaccharides, alone or as a mixture. This additive, alone, gives the drilling fluid shear-thinning properties and is stable up to temperatures of about 180° C.
    Type: Grant
    Filed: May 14, 1999
    Date of Patent: February 19, 2002
    Assignee: Rhodia Chimie
    Inventors: Bruno Langlois, Joël Benchimol, Gilles Guerin, Isabelle Vincent, Alain Senechal, Robert Cantiani
  • Patent number: 6342467
    Abstract: A chemical system and method to stop or minimize fluid loss during completion of wells penetrating hydrocarbon formations are provided. The inventions relates to formulating a highly stable crosslinked hydroxyethyl cellulose (HEC), control released viscosity reduction additives, and user friendly packaging. The chemical system contains a linear HEC polymer solution, a low solubility compound which slowly raises the fluid pH, a chelating agent which further increases the pH level beyond the equilibrium achievable by the low solubility compound, a metal crosslinker which crosslinks HEC at elevated pH, a crosslink delaying agent which allows fluid viscosity to remain low until the fluid reaches the subterranean formation, and optionally an internal breaker. The chemical additives are packaged as an integrated pallet and transported to a field location which allows operators to conveniently mix them before pumping.
    Type: Grant
    Filed: November 2, 2000
    Date of Patent: January 29, 2002
    Assignee: Schlumberger Technology Corporation
    Inventors: Frank F. Chang, Mehmet Parlar
  • Patent number: 6303544
    Abstract: A modified cellulose product comprising cellulose ether, such as carboxymethyl cellulose, hydroxyethyl cellullose, carboxymethyl hydroxyethyl cellulose, methyl cellulose, hydroxyethyl methyl cellulose or ethyl hydroxyethyl cellulose, or xanthan gum product, characterized in that it further comprises salts of aluminium-, ferro-, ferri-, zinc-, nickel-, tin(2)- or tin(4)-cations, and nitrilo-tri-acetic acid, 1,2-cyclo-hexan-di-amin-N,N,N′,N′-tetra-acetic acid, di-ethylen-tri-amine-penta-acetic acid, ethylen-di-oxy-bis(ethylen-nitrilo)-tetra-acetic acid, (N-(2-hydroxy-ethyl)-ethylen-diamin-N, N′,N′,tri-acetic acid, tri-ethylen-tetra-amine-hexa-acetic acid or N-(hydroxyethyl) ethylene-di-amine-tri-acetic acid as a ligand. The product can be used especially as a drilling mud additive.
    Type: Grant
    Filed: September 13, 1999
    Date of Patent: October 16, 2001
    Assignee: Metsa Specialty Chemicals OY
    Inventors: Antonius Franciscus Maas, Goeran Einar Kloow, Oliver Ruppert
  • Patent number: 6281172
    Abstract: Water based drilling fluid compositions which contain at least one viscosity builder and at least one rheological control agent wherein the rheological control agent is an amphoteric polymer, the cationic groups of the amphoteric polymer being quaternary ammonium groups.
    Type: Grant
    Filed: April 7, 1999
    Date of Patent: August 28, 2001
    Assignee: Akzo Nobel NV
    Inventors: Brent Warren, Peter M. van der Horst, Theodorus A. van't Zelfde
  • Patent number: 6258756
    Abstract: A salt water drilling mud comprising a mixture salt water, a solid phase such as pre-hydrated bentonite, attapulgite, sepiolite, and extended bentonite, among others and optionally a synthetic oil, which is mixed with at least one of five different modules. A first module contains caustic, a natural wax and a natural thinner. A second module contains components of the first module and an alkali metal aluminate prepared by reacting the first module with aluminum metal. A third module contains the components of the first module and an alkali metal phosphate and/or alkali metal silicate. A fourth module contains the components of the first module, a saturated or unsaturated carboxylic acid source, a surfactant, and a preservative. The fifth module contains a combination of the first, third and fourth modules.
    Type: Grant
    Filed: January 26, 1999
    Date of Patent: July 10, 2001
    Assignee: Spectral, Inc.
    Inventor: Asadollah Hayatdavoudi