Patents Assigned to EVANS ENGINEERING & MANUFACTURING, INC.
  • Predetermined Load Release Device for a Jar
    Publication number: 20210230958
    Abstract: A release device for a jarring tool includes a collet positioned between the mandrel of the jarring tool and a trigger sleeve. At least one end of the collet is in contact with a precompressed spring via a bushing. In order for the jarring tool to operate, a force greater than the precompressed force of the spring must be applied to the mandrel so that the collet can move in axial direction against the spring thereby releasing the mandrel.
    Type: Application
    Filed: April 13, 2021
    Publication date: July 29, 2021
    Applicant: Evans Engineering & Manufacturing, Inc.
    Inventor: Robert W. Evans
  • Predetermined load release device for a jar
    Patent number: 10975649
    Abstract: A release device for a jarring tool includes a collet positioned between the mandrel of the jarring tool and a trigger sleeve. At least one end of the collet is in contact with a precompressed spring via a bushing. In order for the jarring tool to operate, a force greater than the precompressed force of the spring must be applied to the mandrel so that the collet can move in axial direction against the spring thereby releasing the mandrel.
    Type: Grant
    Filed: January 23, 2019
    Date of Patent: April 13, 2021
    Assignee: Evans Engineering & Manufacturing, Inc.
    Inventor: Robert W. Evans
  • Predetermined load release device for a jar
    Patent number: 10208554
    Abstract: A release device for a jarring tool includes a collet positioned between the mandrel of the jarring tool and a trigger sleeve. At least one end of the collet is in contact with a precompressed spring via a bushing. In order for the jarring tool to operate, a force greater than the precompressed force of the spring must be applied to the mandrel so that the collet can move in axial direction against the spring thereby releasing the mandrel.
    Type: Grant
    Filed: February 10, 2015
    Date of Patent: February 19, 2019
    Assignee: EVANS ENGINEERING & MANUFACTURING, INC.
    Inventor: Robert W. Evans