Patents by Inventor Benjamin E. Foster

Benjamin E. Foster 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).

  • Hydraulic stabilizer for bore hole tool
    Patent number: 4776394
    Abstract: A stabilizer (36) mounted on a mandrel (14) of a workstring (12) within a casing (10) of a well bore hole. The stabilizer (36) has an upper carrier (38) fixed to the mandrel (14) and a lower carrier (40) mounted on the mandrel (14) for relative sliding movement. Shoes (70) are mounted by links or arms (64, 74) to bearing housing (50, 80) on the carriers (38, 40). The bearing housings (50, 80) are mounted for relative rotation on the carriers (38, 40) and permit the mandrel (14) and workstring (12) to rotate relative to the shoes (70) upon fluid actuation of lower carrier (40) and engagement of the casing (10) by the shoes (70).
    Type: Grant
    Filed: February 13, 1987
    Date of Patent: October 11, 1988
    Assignee: Tri-State Oil Tool Industries, Inc.
    Inventors: Gerald D. Lynde, Benjamin E. Foster