Patents Assigned to Den-con Tool Company
  • Patent number: 7062413
    Abstract: An oilfield equipment identifying apparatus comprising a computer loaded with an oilfield equipment database. A unique identification code is input into the computer for each piece of oilfield equipment in the drill string to form a reference in the oilfield equipment database to each piece of oilfield equipment in the drill string. A drilling monitoring device receives input signals indicative of at least one of rotating and non-rotating usage of the drill string and output signals to the computer wherein the computer continuously and automatically monitors the cumulative rotating usage and non-rotating usage of each piece of oilfield equipment identified in the drill string.
    Type: Grant
    Filed: November 8, 2005
    Date of Patent: June 13, 2006
    Assignee: Den-Con Tool Company
    Inventors: Lawrence A. Denny, Edward E. Patterson
  • Patent number: 6973416
    Abstract: An oilfield equipment identifying apparatus comprising a computer loaded with an oilfield equipment database. A unique identification code is input into the computer for each piece of oilfield equipment in the drill string to form a reference in the oilfield equipment database to each piece of oilfield equipment in the drill string. A drilling monitoring device receives input signals indicative of at least one of rotating and non-rotating usage of the drill string and output signals to the computer wherein the computer continuously and automatically monitors the cumulative rotating usage and non-rotating usage of each piece of oilfield equipment identified in the drill string.
    Type: Grant
    Filed: August 4, 2003
    Date of Patent: December 6, 2005
    Assignee: Den-con Tool Company
    Inventors: Lawrence A. Denny, Edward E. Patterson
  • Patent number: 4235469
    Abstract: An apparatus for insertion into the interior of large diameter pipe or tubing which engages inner portions of the pipe so that the pipe may be lifted and moved. Slip assemblies are wedged into engagement with inner portions of the pipe. The amount of wedging may be varied with a hydraulic cylinder or other suitable power source. Pipe guide members are provided to insure centering of the apparatus within the pipe.
    Type: Grant
    Filed: May 11, 1979
    Date of Patent: November 25, 1980
    Assignee: Den-Con Tool Company
    Inventors: Lawrence A. Denny, James E. Aswell