Patents Represented by Attorney James Duzan

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  • Capsule charge perforating system
    Patent number: 4739839
    Abstract: A perforating gun apparatus includes an elongated radially resilient carrier with a plurality of capsule type shaped charges attached to the carrier in a circumferentially phased pattern. The carrier is capable of passing downward through restricted diameter openings and subsequently expanding so as to hold the shaped charges with a near zero standoff from the well bore which is to be perforated.
    Type: Grant
    Filed: December 19, 1986
    Date of Patent: April 26, 1988
    Assignee: Jet Research Center, Inc.
    Inventors: John A. Regalbuto, Jerry L. Walker