Patents by Inventor Robert P. Hendrick

Robert P. Hendrick 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).

  • Recovery of hydrocarbons by in situ thermal extraction
    Patent number: 3954140
    Abstract: Hydrocarbons are recovered from a subterranean formation by providing a plurality of generally horizontal boreholes in the formation. The boreholes are vertically spaced across the thickness of the formation and extend from the top to the bottom thereof. Selected boreholes are heated by means of an external source to drive off hot hydrocarbon gases. The hot gases are fed to selected, unheated boreholes to effect a preheating of the selected boreholes and to cool the hot gases prior to their recovery from the formation.
    Type: Grant
    Filed: August 13, 1975
    Date of Patent: May 4, 1976
    Inventor: Robert P. Hendrick