Patents by Inventor Raymond W. DerMott

Raymond W. DerMott 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).

  • Through the tubing perforating gun assembly
    Patent number: 4496009
    Abstract: A through the tubing perforating gun assembly having means for separating the upper head from the gun carrier upon firing. This allows the gun carrier to fall to the bottom of the well and eliminates the need to retrieve the carrier. Special charges are used to separate the carrier from the head with the charges being fired simultaneously with the gun charges.
    Type: Grant
    Filed: September 20, 1983
    Date of Patent: January 29, 1985
    Assignees: Shell Oil Company, Schlumberger Technology Corp.
    Inventors: Raymond W. DerMott, Kenneth J. Hartwein
  • Explosive safe-arming system for perforating guns
    Patent number: 4319526
    Abstract: An explosive safe-arming system for use in a perforating gun for oil and gas well wireline operation is disclosed, wherein a donor detonating explosive is used which includes two encased elements. The first element is fixedly secured within the perforating gun, and the second element is removably mounted within the perforating gun.
    Type: Grant
    Filed: December 17, 1979
    Date of Patent: March 16, 1982
    Assignee: Schlumberger Technology Corp.
    Inventor: Raymond W. DerMott