Patents by Inventor L. Allen Sinor

L. Allen Sinor 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: 5111892
    Abstract: A subterranean drill bit is provided that comprises a drill bit body having a base portion disposed about a longitudinal bit axis, a gauge portion disposed about the bit axis and extending from the base portion, and a face portion disposed about the bit axis extending from the gauge portion. The drill bit further includes a plurality of cutting elements fixedly disposed on and projecting from the face portion and spaced from one another. A hydrostatic bearing is disposed in the gauge portion to create a hydrostatically lubricated low friction zone that facilitates rotation of the drill bit without gripping of rotation of the drill bit is thereby maintained substantially at one location on the drill bit, which avoids backwards whirling and provides stable bit rotation.
    Type: Grant
    Filed: October 3, 1990
    Date of Patent: May 12, 1992
    Inventors: L. Allen Sinor, Tommy M. Warren