Patents Represented by Attorney Clark Dougherty, Jr.

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  • Encapsulated chemicals for use in controlled time release applications and methods
    Patent number: 6444316
    Abstract: Encapsulated water soluble chemicals for use in controlled time release applications, methods of encapsulating the chemicals and methods of using the encapsulated chemicals are provided. The methods of encapsulating the chemicals are basically comprised of forming a first coating of a dry hydrophobic film forming material or a sparingly soluble material which provides a dry shield on the chemical and then forming a second coating of a porous cross-linked hydrophilic polymer on the first coating which prevents the substantial dissolution of the resulting encapsulated chemical for a selected period of time.
    Type: Grant
    Filed: May 5, 2000
    Date of Patent: September 3, 2002
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Baireddy R. Reddy, Ronald J. Crook, Dennis W. Gray, Russell M. Fitzgerald, Bradley L. Todd, Steven B. Laramay
  • Well drilling and servicing fluids and methods of removing filter cake deposited thereby
    Patent number: 6422314
    Abstract: Well drilling and servicing fluids for use in producing formations and methods of removing filter cake therefrom are provided. The methods basically comprise using a drilling or servicing fluid comprised of water, a density increasing water soluble salt, a fluid loss control agent, a hydratable polymer solid suspending agent and a particulate solid bridging agent which is soluble in an aqueous ammonium salt solution. Thereafter, the filter cake deposited by the drilling or servicing fluid is contacted with a clean-up solution comprised of water and an ammonium salt for a period of time such that the bridging agent is dissolved thereby.
    Type: Grant
    Filed: August 1, 2000
    Date of Patent: July 23, 2002
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Bradley L. Todd, B. Raghava Reddy, James V. Fisk, Jr., James D. Kercheville
  • Low NOx apparatus and methods for burning liquid and gaseous fuels
    Patent number: 6422858
    Abstract: Low NOx apparatus and methods for burning liquid and gaseous fuels are provided by the present invention. The apparatus of the invention is basically comprised of a housing having an open discharge end attached to a furnace space, means for introducing a controlled quantity of air into the housing and into the furnace space, a combustion compartment disposed within the housing for providing a primary combustion zone therein having an open inlet end for receiving a portion of the air introduced into the housing and an open discharge end, a liquid fuel nozzle attached to the housing for discharging liquid fuel into the primary combustion zone, at least one primary gaseous fuel nozzle for discharging primary gaseous fuel into the primary combustion zone and at least one secondary gaseous fuel nozzle for discharging secondary gaseous fuel into the furnace space.
    Type: Grant
    Filed: September 11, 2000
    Date of Patent: July 23, 2002
    Assignee: John Zink Company, LLC
    Inventors: I-Ping Chung, Joseph Colannino, Christoph Strupp
  • Methods of cementing in subterranean zones
    Patent number: 6419016
    Abstract: Improved methods of cementing in subterranean zones penetrated by well bores are provided. The methods are basically comprised of the steps of preparing a cement composition comprised of a hydraulic cement, a biodegradable, substantially non-dispersing set retarder of low anionic character comprised of polysuccinimide and sufficient water to form a slurry, placing said cement composition in said subterranean zone and allowing said cement composition to set into a solid mass therein.
    Type: Grant
    Filed: September 29, 2000
    Date of Patent: July 16, 2002
    Assignee: Halliburton Energy Services, Inc.
    Inventor: B. Raghava Reddy
  • Process for producing and cooling titanium dioxide
    Patent number: 6419893
    Abstract: An improved process for producing titanium dioxide wherein gaseous titanium tetrachloride and oxygen are reacted at a high temperature to produce particulate solid titanium dioxide and gaseous reaction products is provided. The titanium dioxide and gaseous reaction products are cooled by passing them through a tubular heat exchanger along with a scouring medium for removing deposits from the inside surfaces of the tubular heat exchanger. By this invention, the particulate scouring medium, the particulate titanium dioxide and the gaseous reaction products are caused to follow a spiral path as they flow through the tubular heat exchanger whereby the scouring medium more thoroughly removes the deposits and the titanium dioxide and gaseous reaction products are cooled more efficiently.
    Type: Grant
    Filed: September 18, 2000
    Date of Patent: July 16, 2002
    Assignee: Kerr-McGee Chemical LLC
    Inventors: William A. Yuill, Charles A. Natalie, Harry E. Flynn, Bita Fillipi
  • Process for removing dissolved uranium from water
    Patent number: 6419832
    Abstract: A process for removing dissolved uranium from water is provided. The process basically comprises (a) mixing phosphoric acid or particulate bone ash with the water, (b) mixing calcium hydroxide with the mixture produced in step (a) to thereby form calcium hydroxy phosphate or calcium hydroxy apatite which reacts with and complexes at least a portion of the uranium in the water to form a precipitate thereof, and (c) separating the precipitate from the water.
    Type: Grant
    Filed: March 6, 2000
    Date of Patent: July 16, 2002
    Assignee: Kerr-McGee Chemical LLC
    Inventors: Garet Edward Van De Steeg, Anand S. Paranjape
  • Defoaming methods and compositions
    Patent number: 6417142
    Abstract: The present invention provides methods and defoaming compositions for preventing the formation of foam or the entrainment of gas in a liquid fluid or for breaking a previously formed liquid fluid foam.
    Type: Grant
    Filed: October 2, 2001
    Date of Patent: July 9, 2002
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Jiten Chatterji, Roger S. Cromwell, Bobby J. King, Frank Zamora
  • Sealing subterranean zones
    Patent number: 6401817
    Abstract: The present invention provides improved compositions and methods of using the compositions for sealing subterranean zones. One composition of the invention is comprised of water, an aqueous rubber latex, an organophilic clay, sodium carbonate, an epoxy resin and a hardening agent for said epoxy resin.
    Type: Grant
    Filed: August 30, 2001
    Date of Patent: June 11, 2002
    Assignee: Halliburton Energy Services, Inc.
    Inventors: James E. Griffith, Ricky A. Cox, Jiten Chatterji, Bobby J. King, Roger S. Cromwell, John L. Dennis, Jr.
  • Methods and compositions for forming permeable cement sand screens in well bores
    Patent number: 6390195
    Abstract: Methods and compositions for forming permeable cement sand screens in well bores are provided. The compositions are basically comprised of a hydraulic cement, a particulate cross-linked gel containing an internal breaker which after time causes the gel to break into a liquid and water present in an amount sufficient to form a slurry.
    Type: Grant
    Filed: October 27, 2000
    Date of Patent: May 21, 2002
    Assignee: Halliburton Energy Service,s Inc.
    Inventors: Philip D. Nguyen, Ronald J. Crook, Johnny A. Barton, David L. Brown
  • Fuel dilution methods and apparatus for NOx reduction
    Patent number: 6383462
    Abstract: Methods and apparatus for reducing the content of nitrogen oxides in the flue gases produced by the combustion of fuel gas and combustion air introduced into a burner connected to a furnace are provided. The methods basically comprise the steps of conducting the combustion air to the burner, providing a chamber outside of the burner and furnace for mixing flue gases from the furnace with the fuel gas, discharging the fuel gas in the form of a fuel jet into the mixing chamber so that flue gases from the furnace are drawn into the chamber and mixed with and dilute the fuel gas therein and conducting the resulting mixture of flue gases and fuel gas to the burner wherein the mixture is combined with the combustion air and burned in the furnace.
    Type: Grant
    Filed: June 20, 2000
    Date of Patent: May 7, 2002
    Assignee: John Zink Company, LLC
    Inventor: Jerry M. Lang
  • Fuel dilution methods and apparatus for NOx reduction
    Patent number: 6383461
    Abstract: Methods and apparatus for reducing the content of nitrogen oxides in the flue gases produced by the combustion of fuel gas and combustion air introduced into a burner connected to a furnace are provided. The methods basically comprise the steps of conducting the combustion air to the burner, providing a chamber outside of the burner and furnace for mixing flue gases from the furnace with the fuel gas, discharging the fuel gas in the form of a fuel jet into the mixing chamber so that flue gases from the furnace are drawn into the chamber and mixed with and dilute the fuel gas therein and conducting the resulting mixture of flue gases and fuel gas to the burner wherein the mixture is combined with the combustion air and burned in the furnace.
    Type: Grant
    Filed: April 12, 2000
    Date of Patent: May 7, 2002
    Assignee: John Zink Company, LLC
    Inventor: Jerry M. Lang
  • Flow properties of dry cementitious and non-cementitious materials
    Patent number: 6379456
    Abstract: Methods of improving the flow properties of at least one dry particulate cementitious or non-cementitious material are provided. The methods are basically comprised of dry-blending a particulate flow enhancing additive comprised of a particulate solid absorbent material having a flow inducing polar molecule producing chemical absorbed thereon with said cementitious or non-cementitious material.
    Type: Grant
    Filed: April 11, 2000
    Date of Patent: April 30, 2002
    Assignee: Halliburton Energy Services, Inc.
    Inventors: James F. Heathman, Baireddy R. Reddy, Ronald E. Sweatman, Sears T. Dealy
  • Methods and ultra-low density sealing compositions for sealing pipe in well bores
    Patent number: 6367549
    Abstract: The present invention provides methods and ultra-low density sealing compositions for sealing pipe in well bores penetrating formations which readily fracture at low hydrostatic pressures. A method of the invention basically comprises the steps of providing a hardenable ultra-low density sealing composition comprised of an epoxide containing liquid, a hardening agent, a hardening accelerating agent, a light weight filler and hollow glass michrospheres having a density in the range of from about 5 to 8.5 pounds per gallon, placing the sealing composition in the annulus between the pipe to be sealed and the walls of the well bore and allowing the sealing composition to harden therein.
    Type: Grant
    Filed: September 21, 2001
    Date of Patent: April 9, 2002
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Jiten Chatterji, Roger S. Cromwell, Bobby J. King, Dennis W. Gray, Ronald J. Crook, Frank Zamora
  • Foamed well cement slurries, additives and methods
    Patent number: 6367550
    Abstract: The present invention provides improved foamed well cement slurries, additives and methods. The foamed well cement slurries are basically comprised of a hydraulic cement, sufficient water to form a pumpable slurry, sufficient gas to form a foam and an effective amount of an additive for foaming the slurry comprised of hydrolyzed keratin.
    Type: Grant
    Filed: October 25, 2000
    Date of Patent: April 9, 2002
    Assignee: Halliburton Energy Service, Inc.
    Inventors: Jiten Chatterji, Roger S. Cromwell, Chad R. Brenneis, Bobby J. King, Dennis W. Gray, Frank Zamora
  • Methods of reducing the water permeability of subterranean formations
    Patent number: 6364016
    Abstract: Improved methods of treating water and hydrocarbons producing subterranean formations to reduce the water permeabilities of the formations without substantially reducing the hydrocarbons permeabilities thereof are provided. The methods basically comprise introducing into the formation a chemical which does not resist water flow and attaches to adsorption sites on surfaces within the porosity of the formation but slowly washes off the sites as another fluid flows through the treated formation. Thereafter, a water flow resisting polymer is introduced into the formation so that it flows deeply into the porosity of the formation before the previously introduced chemical washes off and attaches to the adsorption sites as the chemical washes off.
    Type: Grant
    Filed: October 26, 2000
    Date of Patent: April 2, 2002
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Eldon D. Dalrymple, Larry S. Eoff, Baireddy R. Reddy, David L. Brown, Paul S. Brown
  • Methods and compositions for cementing pipe strings in well bores
    Patent number: 6350309
    Abstract: The present invention provides improved methods and compositions for cementing pipe strings in well bores. The methods of the invention are basically comprised of preparing a cement composition comprised of a hydraulic cement, an epoxy resin, a hardening agent for the epoxy resin and sufficient water to form a pumpable slurry. Thereafter, the cement composition is introduced into the annulus between a pipe string and a well bore and the cement composition is allowed to set into a resilient impermeable solid mass.
    Type: Grant
    Filed: February 13, 2001
    Date of Patent: February 26, 2002
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Jiten Chatterji, Roger S. Cromwell, Robert D. Kuhlman, Bobby J. King
  • Cement compositions and methods for high temperature wells containing carbon dioxide
    Patent number: 6332921
    Abstract: The present invention provides light weight high temperature well cement compositions and methods. The compositions are basically comprised of calcium aluminate, ASTM class F fly ash and water.
    Type: Grant
    Filed: August 9, 2000
    Date of Patent: December 25, 2001
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Lance E. Brothers, Susan M. Turkett, Barry B. Ekstrand, D. Chad Brenneis, Jerry D. Childs
  • Resilient well cement compositions and methods
    Patent number: 6330917
    Abstract: The present invention provides improved compositions and methods for sealing pipe in a well bore. The compositions which harden into highly resilient solid masses having high strengths are basically comprised of a hydraulic cement, an aqueous rubber latex, an aqueous rubber latex stabilizing surfactant, an epoxy resin, an epoxy resin hardening agent and porous precipitated silica hydrophobicized with silicone oil.
    Type: Grant
    Filed: January 23, 2001
    Date of Patent: December 18, 2001
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Jiten Chatterji, Roger S. Cromwell, Baireddy R. Reddy, Bobby J. King
  • Sealing subterranean zones
    Patent number: 6328106
    Abstract: The present invention provides improved compositions and methods of using the compositions for sealing subterranean zones. One composition of the invention is comprised of water, an aqueous rubber latex, an organophilic clay, sodium carbonate, an epoxy resin and a hardening agent for said epoxy resin.
    Type: Grant
    Filed: November 2, 2000
    Date of Patent: December 11, 2001
    Assignee: Halliburton Energy Services, Inc.
    Inventors: James E. Griffith, Ricky A. Cox, Jiten Chatterji, Bobby J. King, Roger S. Cromwell, John L. Dennis, Jr.
  • Methods of sealing pipe strings in disposal wells
    Patent number: 6321841
    Abstract: Improved methods of completing wells penetrating subterranean corrosive fluid disposal zones are provided. The methods basically comprise the steps of preparing a pumpable, water compatible, corrosion resistant, hardenable epoxy sealing composition comprised of a hardenable epoxide containing liquid and a hardening agent, placing the epoxy sealing composition in the annulus between a string of pipe and a well bore penetrating a disposal zone and allowing the epoxy sealing composition to harden.
    Type: Grant
    Filed: February 21, 2001
    Date of Patent: November 27, 2001
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Larry S. Eoff, Jiten Chatterji, Roger S. Cromwell, Bobby J. King