Patents by Inventor Norman G. Hortman

Norman G. Hortman 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).

  • Weight and pressure operated well testing apparatus and its method of operation
    Patent number: 4076077
    Abstract: A method and apparatus are presented which are particularly useful in testing the production capabilities of offshore oil wells. The apparatus includes a normally closed, weight operated valve which opens a preset delay after the weight operated valve is subjected to sufficient weight such as when a test string is set down upon, and supported by, a packer isolating an underground formation; and a normally open, weight and pressure operated valve which closes immediately when the test string is set down upon the packer. The weight and pressure operated valve expands a sealed chamber when subjected to sufficient weight to close its associated valve. The weight and pressure operated valve also includes a pressure responsive piston which opens and closes the valve, and which is responsive to the pressure in the sealed chamber, and to fluid pressure in the well annulus.
    Type: Grant
    Filed: December 2, 1976
    Date of Patent: February 28, 1978
    Assignee: Halliburton Company
    Inventors: George J. Nix, Burchus Q. Barrington, David L. Farley, Norman G. Hortman
  • Weight and pressure operated well testing apparatus and its method of operation
    Patent number: 4059153
    Abstract: A method and apparatus are presented which are particularly useful in testing the production capabilities of offshore oil wells. The apparatus includes a normally closed, weight operated valve which opens a preset delay after the weight operated valve is subjected to sufficient weight such as when a test string is set down upon, and supported by, a packer isolating an underground formation; and a normally open, weight and pressure operated valve which closes immediately when the test string is set down upon the packer. The weight and pressure operated valve expands a sealed chamber when subjected to sufficient weight to close its associated valve. The weight and pressure operated valve also includes a pressure responsive piston which opens and closes the valve, and which is responsive to the pressure in the sealed chamber, and to fluid pressure in the well annulus.
    Type: Grant
    Filed: December 2, 1976
    Date of Patent: November 22, 1977
    Assignee: Halliburton Company
    Inventors: George J. Nix, Burchus Q. Barrington, David L. Farley, Norman G. Hortman
  • Weight and pressure operated well testing apparatus and its method of operation
    Patent number: 4047564
    Abstract: A method and apparatus are presented which are particularly useful in testing the production capabilities of offshore oil wells. The apparatus includes a normally closed, weight operated valve which opens a preset delay after the weight operated valve is subjected to sufficient weight such as when a test string is set down upon, and supported by, a packer isolating an underground formation; and a normally open, weight and pressure operated valve which closes immediately when the test string is set down upon the packer. The weight and pressure operated valve expands a sealed chamber when subjected to sufficient weight to close its associated valve. The weight and pressure operated valve also includes a pressure responsive piston which opens and closes the valve, and which is responsive to the pressure in the sealed chamber, and to fluid pressure in the well annulus.
    Type: Grant
    Filed: July 14, 1975
    Date of Patent: September 13, 1977
    Assignee: Halliburton Company
    Inventors: George J. Nix, Burchus Q. Barrington, David L. Farley, Norman G. Hortman