Patents by Inventor Kenneth M. Cowan

Kenneth M. Cowan 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).

  • Wellbore sealing with two-component ionomeric system
    Patent number: 5307877
    Abstract: A drilling and cementing process wherein a drilling fluid containing a metal compound which is a proton acceptor component is utilized and thereafter combined with a water-soluble or water-dispersable polymer of the formula ##STR1## wherein A is ##STR2## or a mixture of ##STR3## and, wherein R is hydrogen or 1-10 carbon atom alkyl radical, to give a cementitious slurry which is thereafter used in a cementing operation.
    Type: Grant
    Filed: October 22, 1992
    Date of Patent: May 3, 1994
    Assignee: Shell Oil Company
    Inventors: Kenneth M. Cowan, Arthur H. Hale
  • Wellbore cementing with ionomer-blast furnace slag system
    Patent number: 5301754
    Abstract: A drilling and cementing process wherein a drilling fluid containing blast furnace slag which serves as a a metal compound which is a proton acceptor component is utilized and thereafter combined with a water-soluble or water-dispersable polymer of the formula ##STR1## wherein A is ##STR2## or a mixture of ##STR3## and, wherein R is hydrogen or 1-10 carbon atom alkyl radical, to give a cementitious slurry which is thereafter used in a cementing operation. The metal oxide source and/or the cementitious component of the cement can be blast furnace slag.
    Type: Grant
    Filed: October 22, 1992
    Date of Patent: April 12, 1994
    Assignee: Shell Oil Company
    Inventors: Kenneth M. Cowan, Arthur H. Hale
  • Drilling and cementing with phosphate-blast furnace slag
    Patent number: 5301752
    Abstract: A drilling and cementing process wherein a drilling fluid containing a metal compound component is utilized and thereafter combined with a phosphorus acid to give a cementitious slurry which is thereafter used in a cementing operation. Blast furnace slag can be the source of the metal compound.
    Type: Grant
    Filed: October 22, 1992
    Date of Patent: April 12, 1994
    Assignee: Shell Oil Company
    Inventors: Kenneth M. Cowan, Arthur H. Hale
  • Cement fluid loss reduction
    Patent number: 5298070
    Abstract: A surfactant is added to a cement containing a polymer fluid loss additive, to synergistically reduce fluid loss from the cement before it hardens.
    Type: Grant
    Filed: December 18, 1992
    Date of Patent: March 29, 1994
    Assignee: Shell Oil Company
    Inventor: Kenneth M. Cowan
  • Cement slurry and cement compositions
    Patent number: 5284513
    Abstract: A cement slurry composition is provided comprising blast furnace slag, water and salt, and a hydraulic material comprising blast furnace slag and salt, and a cured cement therefrom. These compositions are particularly useful in cementing wellbores within salt formations because salt saturated cement slurries can be prepared without the need for expensive additives.
    Type: Grant
    Filed: October 22, 1992
    Date of Patent: February 8, 1994
    Inventors: Kenneth M. Cowan, Arthur H. Hale
  • Method for installation of piles in offshore locations
    Patent number: 5275511
    Abstract: A method for installing piles in offshore waters using a drill and grout technique. The method utilizes a drilling fluid for drilling the borehole for the pile that forms a cementitious filter cake on the borehole wall and a cement for grouting the pile that is compatible with both the filter cake and salt water.
    Type: Grant
    Filed: October 22, 1992
    Date of Patent: January 4, 1994
    Assignee: Shell Oil Company
    Inventors: John H. Pelletier, Kris A. Digre, Earl H. Doyle, Jr., Kenneth M. Cowan, Arthur H. Hale, James J. W. Nahm
  • Cement sealing
    Patent number: 5275654
    Abstract: Cement-to-casing sealing in a wellbore is improved through addition of surfactant to the cement.
    Type: Grant
    Filed: April 13, 1992
    Date of Patent: January 4, 1994
    Assignee: Shell Oil Corporation
    Inventor: Kenneth M. Cowan
  • Method for strengthening the structural base of offshore structures
    Patent number: 5269632
    Abstract: A method for strengthening the soil and rock formations forming the structural base of a structure wherein a cement slurry is injected into the soil and rock formations. The method is particularly useful in strengthening the foundations of offshore structures.
    Type: Grant
    Filed: October 22, 1992
    Date of Patent: December 14, 1993
    Assignee: Shell Oil Company
    Inventors: John H. Pelletier, Kenneth M. Cowan, Arthur H. Hale
  • Cement fluid loss reduction
    Patent number: 5207831
    Abstract: A surfactant is added to a cement containing a polymer fluid loss additive, to synergistically reduce fluid loss from the cement before it hardens.
    Type: Grant
    Filed: January 27, 1992
    Date of Patent: May 4, 1993
    Assignee: Shell Oil Company
    Inventor: Kenneth M. Cowan
  • Solidification of water based muds
    Patent number: 5058679
    Abstract: A drilling mud is converted in-situ to a cement by addition of blast furnace slag.
    Type: Grant
    Filed: March 19, 1991
    Date of Patent: October 22, 1991
    Assignee: Shell Oil Company
    Inventors: Arthur H. Hale, Kenneth M. Cowan
  • Process for cementing a well
    Patent number: 5020598
    Abstract: Cement-to-casing sealing in a wellbore is improved through addition of a polyalcohol to the cement.
    Type: Grant
    Filed: June 8, 1989
    Date of Patent: June 4, 1991
    Assignee: Shell Oil Company
    Inventors: Kenneth M. Cowan, Arthur H. Hale
  • Cement sealing
    Patent number: 5016711
    Abstract: Cement-to-casing sealing in a wellbore is improved through addition of surfactant to the cement.
    Type: Grant
    Filed: February 24, 1989
    Date of Patent: May 21, 1991
    Assignee: Shell Oil Company
    Inventor: Kenneth M. Cowan