Patents Assigned to Antelope Oil Tool & Manufacturing Company
  • Expandable centralizer
    Patent number: 6457519
    Abstract: A centralizer for laterally positioning an instrument in an opening larger in diameter than the diameter of an opening through which the centralizer can freely pass. The centralizer includes spring blades affixed at one end to an outer surface of the instrument and extending axially to a stop collar rotatably positioned on the outer surface of the instrument. A latch is operatively coupled to the stop collar and is adapted to enable rotation of the stop collar about the instrument upon release of the latch.
    Type: Grant
    Filed: February 20, 2001
    Date of Patent: October 1, 2002
    Assignee: Antelope Oil Tool and Manufacturing Company, Inc.
    Inventor: Jean P. Buytaert
  • Centralizer band-collar connection
    Patent number: 4545436
    Abstract: Improvements in well bore centralizers; improvements in centralizers which may be shipped by the manufacturer unassembled, occupying a small volume of space, and later assembled; a field-assemblable casing centralizer consisting of a pair of collars and connecting outwardly bowed leaf springs secured to the collars by a cooperating leaf spring end and collar structure and relief thereof permitting both rivet and weld attachments.
    Type: Grant
    Filed: January 20, 1984
    Date of Patent: October 8, 1985
    Assignee: Antelope Oil Tool & Manufacturing Company
    Inventor: James E. Harrison