Patents by Inventor Chester C. Johnston

Chester C. Johnston 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).

  • Treatment of subsurface gas-bearing formations to reduce water production therefrom
    Patent number: 4276935
    Abstract: Excessive water production from a producing gas well is substantially reduced by the injection of a hydrocarbon-diluted water-in-oil emulsion comprising a viscosifying polymer such as polyacrylamide, the injected emulsified polymer swelling on contact with connate water in the subsurface gas producing formation to restrict transfer of water therethrough toward the producing gas well.
    Type: Grant
    Filed: October 30, 1979
    Date of Patent: July 7, 1981
    Assignee: Phillips Petroleum Company
    Inventors: James E. Hessert, Chester C. Johnston, Jr.
  • Composition for acidizing subterranean formations
    Patent number: 4169797
    Abstract: Gelled acidic compositions suitable for either matrix-acidizing or fracture-acidizing of subterranean formations, and methods of using said compositions in acidizing operation, are provided. Said compositions comprise water, a water-soluble cellulose ether, an acid, a water-soluble compound of a polyvalent metal wherein the metal can be reduced to a lower polyvalent valence state and cause gelation of the water containing said cellulose ether and said acid, and a reducing agent capable of reducing said metal and causing said gelation.
    Type: Grant
    Filed: October 27, 1977
    Date of Patent: October 2, 1979
    Assignee: Phillips Petroleum Company
    Inventors: Chester C. Johnston, Jr., Brent J. Bertus, James E. Hessert
  • Aqueous gelable compositions having extended gelation time and methods of preparing same
    Patent number: 4110230
    Abstract: Aqueous gelable compositions comprising water, a polymer, a polyvalent metal compound wherein the metal can be reduced to a lower polyvalent valence state, a reducing agent, and a complexing agent for complexing with newly reduced ions of said metal and increasing the gelation time of said compositions; and methods of preparing said compositions.
    Type: Grant
    Filed: October 6, 1975
    Date of Patent: August 29, 1978
    Assignee: Phillips Petroleum Company
    Inventors: James E. Hessert, Chester C. Johnston, Jr.
  • Method for acidizing subterranean formations
    Patent number: 4068720
    Abstract: Gelled acidic compositions suitable for either matrix acidizing or fracture-acidizing of subterranean formations, and methods of using said compositions in acidizing operations, are provided. Said compositions comprise water, a water-soluble cellulose ether, an acid, a water soluble compound of a polyvalent metal wherein the metal can be reduced to a lower polyvalent valence state and cause gelation of the water containing said cellulose ether and said acid, and a reducing agent capable of reducing said metal and causing said gelation.
    Type: Grant
    Filed: December 24, 1975
    Date of Patent: January 17, 1978
    Assignee: Phillips Petroleum Company
    Inventors: James E. Hessert, Brent J. Bertus, Chester C. Johnston, Jr.
  • Method for altering the permeability of a subterranean formation
    Patent number: 3958638
    Abstract: A method for altering the permeability of a subterranean formation in which aqueous polymer solution and encapsulated reacting agent is passed into the formation with subsequent release of reacting agent in response to formation conditions causing a reaction that thickens the polymer solution.
    Type: Grant
    Filed: June 16, 1975
    Date of Patent: May 25, 1976
    Assignee: Phillips Petroleum Company
    Inventor: Chester C. Johnston