Patents by Inventor Jan Offeringa

Jan Offeringa 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).

  • Carbon-dioxide-assisted production from extensively fractured reservoirs
    Patent number: 4042029
    Abstract: In an oil reservoir which is extensively fractured, the amount of oil recovered is increased by forming gaseous and liquid layers within the fracture network, flowing gaseous CO.sub.2 into the gaseous layer, and producing liquid which contains oil from the liquid layer. The rates and locations of those injections and productions are correlated to keep the interface between the gaseous and liquid layers at selected depths.
    Type: Grant
    Filed: January 9, 1976
    Date of Patent: August 16, 1977
    Assignee: Shell Oil Company
    Inventor: Jan Offeringa
  • Recovery of oil by circulating hot fluid through a gas-filled portion of a network interconnected fractures
    Patent number: 4040483
    Abstract: The recovery of oil from an oil-bearing formation which contains a network of interconnected fractures is improved by circulating a hot heat-exchanging fluid through gas-containing portions of the fractures while producing oil from liquid-containing portions of the fractures.
    Type: Grant
    Filed: January 9, 1976
    Date of Patent: August 9, 1977
    Assignee: Shell Oil Company
    Inventor: Jan Offeringa