Patents by Inventor Leo I. Phelps

Leo I. Phelps 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).

  • Supplementary borehole drilling
    Patent number: 6182760
    Abstract: A duct assembly for drilling supplementary boreholes comprises a plurality of duct body sections, whipstocks, and separators forming multiple channel segments within the duct body sections. In one embodiment, the separators are plates that substantially divide each duct body section into two semicircular channel setments and align adjoining duct body sections, allowing the drilling of supplementary boreholes to be reliably directed without whipstock repositioning.
    Type: Grant
    Filed: July 20, 1998
    Date of Patent: February 6, 2001
    Assignee: Union Oil Company of California
    Inventor: Leo I. Phelps