Patents by Inventor Michael Jarrett

Michael Jarrett 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).

  • Method for determination of amine-based additives in drilling fluid filtrates
    Patent number: 6194216
    Abstract: The invention concerns a method for determining the presence and quantity of an amine-based additive 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, after isolating the amine-based additive, the amount of clay stabilizer is linearly dependent upon the spectrometric count of its peak fluorescent spectrum. The method is reproducible and is not bothered by the presence of lignosulfonate and/or lignite which interferes with conventional methods.
    Type: Grant
    Filed: February 16, 2000
    Date of Patent: February 27, 2001
    Assignee: Baker Hughes Incorporated
    Inventors: Nyal S. Walker, Michael A. Jarrett, Dennis K. Clapper
  • Use of alkoxylated surfactants and aluminum chlorohydrate to improve brine-based drilling fluids
    Patent number: 6194355
    Abstract: A drilling fluid having a brine base fluid, aluminum chlorohydrate as a viscosifying agent, an alkoxylated surfactant, and an amphoteric polymer encapsulant has been found to have excellent viscoelasticity and suspension characteristics. Surprisingly, it has been discovered that a synergistic effect is present between the aluminum chlorohydrate and the surfactant such that less of each component is required when both are used together to suspend the same amount of solids, than if one or the other is used separately.
    Type: Grant
    Filed: February 9, 1999
    Date of Patent: February 27, 2001
    Assignee: Baker Hughes Incorporated
    Inventors: Michael A. Jarrett, Harold R. Krause, John C. Welch, Allen Gabrysch, Patricia Potts
  • Fluids for use in drilling and completion operations comprising water insoluble colloidal complexes for improved rheology and filtration control
    Patent number: 5919738
    Abstract: The present invention provides a method of preparing a fluid for use in drilling and completion operations comprising mixing a fluid comprising a salt of an alkaline earth metal with a nonionic colloid-forming material in an amount and under conditions sufficient to convert a majority of said nonionic colloid-forming material into water insoluble hydrated colloidal complexes comprising hydrated ions of said alkaline earth metal complexed with said nonionic colloid-forming material, said complexes being effective to improve a property of said fluid selected from the group consisting of rheology, fluid loss control, and a combination thereof.
    Type: Grant
    Filed: March 25, 1997
    Date of Patent: July 6, 1999
    Assignee: Baker Hughes Incorporated
    Inventors: James E. Norfleet, Michael A. Jarrett, William M. Dye, Dennis K. Clapper, Geoffrey Robinson, Ronald G. Bland, John B. Weirich, Billy G. Chesser
  • Nonionic alkanolamides as shale stabilizing surfactants for aqueous well fluids
    Patent number: 5607904
    Abstract: The present invention provides nonionic alkanolamides which may be added to drilling fluids in order to minimize hydration and prevent erosion loss of water-sensitive shale substrates. Preferred alkanolamides are acetamide mono- and diethanolamines.
    Type: Grant
    Filed: April 13, 1995
    Date of Patent: March 4, 1997
    Assignee: Baker Hughes Incorporated
    Inventor: Michael Jarrett
  • Amphoteric acetates and glycinates as shale stabilizing surfactants for aqueous well fluids
    Patent number: 5593952
    Abstract: The present invention provides amphoteric acetates, diacetates, and glycinates which may be added to drilling fluids in order to minimize hydration and prevent erosion loss of water-sensitive shale substrates.
    Type: Grant
    Filed: April 12, 1995
    Date of Patent: January 14, 1997
    Assignee: Baker Hughes Incorporated
    Inventor: Michael Jarrett