Patents by Inventor Joe E. Coleman

Joe E. Coleman 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).

  • Method and apparatus for annulus pressure responsive circulation and tester valve manipulation
    Patent number: 4044829
    Abstract: A releasably locked closed circulation valve is introduced into a well bore as part of a drill string. The annulus between the drill string and the well bore, or casing affixed to the well bore, is sealed. Pressure is applied to the annulus and the valve unlocks and opens once the annulus pressure reaches a certain level to allow circulation between the annulus and the interior of the drill string. An optional locking device preferably locks the opened valve in the open position. A second embodiment includes a tester valve simultaneously operable with the circulation valve.
    Type: Grant
    Filed: July 19, 1976
    Date of Patent: August 30, 1977
    Assignee: Halliburton Company
    Inventors: Robert L. Jessup, Joe E. Coleman
  • Method and apparatus for annulus pressure responsive circulation and tester valve manipulation
    Patent number: 3970147
    Abstract: A releasably locked closed circulation valve is introduced into a well bore as part of a drill string. The annulus between the drill string and the well bore, or casing affixed to the well bore, is sealed. Pressure is applied to the annulus and the valve unlocks and opens once the annulus pressure reaches a certain level to allow circulation between the annulus and the interior of the drill string. An optional locking device preferably locks the opened valve in the open position. A second embodiment includes a tester valve simultaneously operable with the circulation valve.
    Type: Grant
    Filed: January 13, 1975
    Date of Patent: July 20, 1976
    Assignee: Halliburton Company
    Inventors: Robert L. Jessup, Joe E. Coleman