Patents by Inventor Arilo A. Andresen

Arilo A. Andresen 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).

  • Patent number: 4518051
    Abstract: The present invention provides a percussion actuated wire line sampler for use in a drill string. The sampler includes a core barrel adapted to be inserted into the drill string and to be freely movable therein. A hydraulic percussion device (16) also insertable and freely movable in the drill string is connected to the core barrel. A downhole mud turbine (20) is provided and is responsive to drilling mud pressure to actuate the percussion device to drive the core barrel out of the end of the drill string into the material to be sampled.
    Type: Grant
    Filed: June 30, 1983
    Date of Patent: May 21, 1985
    Assignee: Chevron Research Company
    Inventors: Steinar Sollie, Arilo A. Andresen