Patents by Inventor Raymond Tsuen

Raymond Tsuen 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).

  • Process for chemically treating reservoir pyrobitumen to improve permeability
    Patent number: 5513707
    Abstract: The process involves a well stimulation treatment of a hydrocarbon reservoir containing solid pyrobitumen. A strong oxidant, preferably sodium hypochlorite, is injected into the reservoir as an aqueous solution containing 5 wt. % or higher concentration of the oxidant. The oxidant is retained in contact with the formation for a predetermined retention period and the well is then backflowed or pumped to remove oxidation products. The permeability of the reservoir is improved, apparently by conversion of the solid pyrobitumen to removable gaseous and liquid products.
    Type: Grant
    Filed: September 23, 1994
    Date of Patent: May 7, 1996
    Assignee: Petroleum Recovery Institute
    Inventors: Jerry C. Shaw, Raymond Tsuen, Conrad Ayasse