Patents by Inventor Johnie L. Landreth

Johnie L. Landreth 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).

  • Method of loggging an inclined wellbore
    Patent number: 4807717
    Abstract: A method is disclosed for logging a formation penetrated by an inclined or horizontal wellbore utilizing a conventioanl logging tool. A collar catcher assembly is attached to a lower portion of a drillstring and a collar is attached to an upper portion of a logging tool. The drillstring is lowered within the wellbore to a position adjacent the formation to be logged. The logging tool is transported through the drillstring until the collar thereon engages and is restrained by the catcher assembly. Then the formation is logged while the drillstring is withdrawn through the wellbore.
    Type: Grant
    Filed: October 30, 1987
    Date of Patent: February 28, 1989
    Assignee: Amoco Corporation
    Inventors: Warren J. Winters, Johnie L. Landreth