Patents by Inventor Keith D Pewitt

Keith D Pewitt has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 9594009
    Abstract: Devices and methods for testing cement include: a pressure vessel with a sample container inside an interior working volume of the pressure vessel, the pressure vessel configured to supply a first pressurized fluid to control a pore pressure of a cement sample and to supply a second pressurized fluid to lateral exterior surfaces of the sample container to provide a confining pressure that can be different than the pore pressure.
    Type: Grant
    Filed: January 28, 2014
    Date of Patent: March 14, 2017
    Assignee: Halliburton Energy Services, Inc.
    Inventors: David L. Meadows, Robert P. Darbe, Keith D. Pewitt
  • Patent number: 8783091
    Abstract: Devices and methods for testing cement include: a pressure vessel with a sample container inside an interior working volume of the pressure vessel, the pressure vessel configured to supply a first pressurized fluid to control a pore pressure of a cement sample and to supply a second pressurized fluid to lateral exterior surfaces of the sample container to provide a confining pressure that can be different than the pore pressure.
    Type: Grant
    Filed: October 28, 2009
    Date of Patent: July 22, 2014
    Assignee: Halliburton Energy Services, Inc.
    Inventors: David L. Meadows, Robert P. Darbe, Keith D. Pewitt
  • Publication number: 20140137660
    Abstract: Devices and methods for testing cement include: a pressure vessel with a sample container inside an interior working volume of the pressure vessel, the pressure vessel configured to supply a first pressurized fluid to control a pore pressure of a cement sample and to supply a second pressurized fluid to lateral exterior surfaces of the sample container to provide a confining pressure that can be different than the pore pressure.
    Type: Application
    Filed: January 28, 2014
    Publication date: May 22, 2014
    Applicant: HALLIBURTON ENERGY SERVICES, INC.
    Inventors: David L. Meadows, Robert P. Darbe, Keith D. Pewitt
  • Publication number: 20130319673
    Abstract: A variety of methods and compositions are disclosed, including, in one embodiment, a method of cementing in a subterranean formation, comprising: introducing a cement composition into a subterranean formation, wherein the cement composition comprises cement, water, and a saponin; and allowing the cement composition to set in the subterranean formation.
    Type: Application
    Filed: May 31, 2012
    Publication date: December 5, 2013
    Applicant: HALLIBURTON ENERGY SERVICES, INC.
    Inventors: Keith D. Pewitt, D. Chad Brenneis, Jeffery D. Karcher
  • Publication number: 20110275736
    Abstract: A method of servicing a wellbore comprising contacting a wellbore servicing composition with a rheology modifying additive wherein the rheology modifying additive comprises a gum and a polymeric material. A method of cementing in a subterranean formation comprising providing a sealant composition comprising cement, water, and a rheology modifying additive wherein the rheology modifying additive comprises a gum and an anionic polymer, placing the composition in the subterranean formation, and allowing the cement composition to set therein.
    Type: Application
    Filed: May 5, 2010
    Publication date: November 10, 2011
    Applicant: HALLIBURTON ENERGY SERVICES, INC.
    Inventors: Benjamin J. Iverson, Narongsak Tonmukayakul, Ian Robb, Keith D. Pewitt
  • Publication number: 20110094295
    Abstract: Devices and methods for testing cement include: a pressure vessel with a sample container inside an interior working volume of the pressure vessel, the pressure vessel configured to supply a first pressurized fluid to control a pore pressure of a cement sample and to supply a second pressurized fluid to lateral exterior surfaces of the sample container to provide a confining pressure that can be different than the pore pressure.
    Type: Application
    Filed: October 28, 2009
    Publication date: April 28, 2011
    Applicant: HALLIBURTON ENERGY SERVICES, INC.
    Inventors: David L. Meadows, Robert P. Darbe, Keith D. Pewitt
  • Patent number: 7654326
    Abstract: A method of servicing a wellbore comprising contacting a metal oxide, a soluble chloride or phosphate salt, water, and a liquid retarder to form a cement composition via a continuous process, wherein the liquid retarder is an aqueous solution having a concentration of less than about 25 w/v %, placing the cement composition into the wellbore, and allowing the cement composition to set. A method of servicing a wellbore comprising (a) contacting an aqueous solution with a soluble salt to form a salt solution, (b) contacting an aqueous solution with a solid retarder to form a liquid retarder wherein the liquid retarder has concentration of less than about 25 w/v %, (c) contacting water, the salt solution, and the liquid retarder to form a mixture, (d) contacting the mixture with a metal oxide to form a cement slurry, wherein the cement slurry is produced with an output rate of from about 0.
    Type: Grant
    Filed: July 10, 2008
    Date of Patent: February 2, 2010
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Ashok Santra, Christopher L. Gordon, Daniel L. Bour, Keith D Pewitt, Dwain King
  • Publication number: 20100006288
    Abstract: A method of servicing a wellbore comprising contacting a metal oxide, a soluble chloride or phosphate salt, water, and a liquid retarder to form a cement composition via a continuous process, wherein the liquid retarder is an aqueous solution having a concentration of less than about 25 w/v %, placing the cement composition into the wellbore, and allowing the cement composition to set. A method of servicing a wellbore comprising (a) contacting an aqueous solution with a soluble salt to form a salt solution, (b) contacting an aqueous solution with a solid retarder to form a liquid retarder wherein the liquid retarder has concentration of less than about 25 w/v %, (c) contacting water, the salt solution, and the liquid retarder to form a mixture, (d) contacting the mixture with a metal oxide to form a cement slurry, wherein the cement slurry is produced with an output rate of from about 0.
    Type: Application
    Filed: July 10, 2008
    Publication date: January 14, 2010
    Inventors: Ashok Santra, Christopher L. Gordon, Daniel L. Bour, Keith D. Pewitt, Dwain King