Patents by Inventor Harvey E. Mallory

Harvey E. Mallory 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).

  • Device for reduction of oxygen content in drilling fluid
    Patent number: 4350505
    Abstract: A method and means for using nitrogen exhaust gases or gaseous mixtures of combustible products for reduction of oxygen in drilling fluids during the drilling of well bores and which comprises utilizing nitrogen from normally waste exhaust gases or the like, injecting the nitrogen and other gases present into the usual drilling muds for replacing the oxygen contents of the drilling muds with the nitrogen gas, whereby corrosive action of the drilling muds is greatly reduced or substantially eliminated.
    Type: Grant
    Filed: August 28, 1978
    Date of Patent: September 21, 1982
    Assignee: Loffland Brothers Company
    Inventors: Harvey E. Mallory, James W. Ward
  • Method and means for reduction of oxygen content in drilling fluid
    Patent number: 4136747
    Abstract: A method and means for using nitrogen exhaust gases or gaseous mixtures of combustible products for reduction of oxygen in drilling fluids during the drilling of well bores and which comprises utilizing nitrogen from normally waste exhaust gases or the like, injecting the nitrogen and other gases present into the usual drilling muds for replacing the oxygen contents of the drilling muds with the nitrogen gas, whereby corrosive action of the drilling muds is greatly reduced or substantially eliminated.
    Type: Grant
    Filed: December 17, 1976
    Date of Patent: January 30, 1979
    Assignee: Loffland Brothers Company
    Inventors: Harvey E. Mallory, James W. Ward