Patents by Inventor David Moore Tumlin

David Moore Tumlin 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 plugging a wellbore
    Patent number: 6595289
    Abstract: The present invention provides a method and apparatus for plugging a wellbore in a trip saving manner. In one aspect, the invention includes a cement retainer disposed on a run-in string and a radially expanded perforating assembly disposed below the cement retainer. In a single run, the apparatus provides for perforating a wellbore and squeezing cement through the perforations and into the formation therearound. In another aspect, a method of plugging the wellbore includes running a cement retainer and a radially expanded perforating assembly into a wellbore on a run-in string. After the cement retainer is set, a firing head is actuated to cause the perforating gun to discharge. After perforations are formed, cement is introduced from the cement retainer into the isolated area and squeezed through the perforations. Thereafter, the run-in string disengages from the cement retainer leaving behind the plug formed.
    Type: Grant
    Filed: May 4, 2001
    Date of Patent: July 22, 2003
    Assignee: Weatherford/Lamb, Inc.
    Inventors: David Moore Tumlin, Gene K. Fugatt, Sr., David Hosie, Mike Luke
  • Method and apparatus for plugging a wellbore
    Publication number: 20030056953
    Abstract: The present invention provides a method and apparatus for plugging a wellbore in a trip saving manner. In one aspect, the invention includes a cement retainer disposed on a run-in string and a radially expanded perforating assembly disposed below the cement retainer. In a single run, the apparatus provides for perforating a wellbore and squeezing cement through the perforations and into the formation therearound. In another aspect, a method of plugging the wellbore includes running a cement retainer and a radially expanded perforating assembly into a wellbore on a run-in string. After the cement retainer is set, a firing head is actuated to cause the perforating gun to discharge. After perforations are formed, cement is introduced from the cement retainer into the isolated area and squeezed through the perforations. Thereafter, the run-in string disengages from the cement retainer leaving behind the plug formed.
    Type: Application
    Filed: November 7, 2002
    Publication date: March 27, 2003
    Applicant: Weatherford/Lamb, Inc.
    Inventors: David Moore Tumlin, Gene K. Fugatt, David Hosie, Mike Luke
  • Method and apparatus for plugging a wellbore
    Publication number: 20020162657
    Abstract: The present invention provides a method and apparatus for plugging a wellbore in a trip saving manner. In one aspect, the invention includes a cement retainer disposed on a run-in string and a radially expanded perforating assembly disposed below the cement retainer. In a single run, the apparatus provides for perforating a wellbore and squeezing cement through the perforations and into the formation therearound. In another aspect, a method of plugging the wellbore includes running a cement retainer and a radially expanded perforating assembly into a wellbore on a run-in string. After the cement retainer is set, a firing head is actuated to cause the perforating gun to discharge. After perforations are formed, cement is introduced from the cement retainer into the isolated area and squeezed through the perforations. Thereafter, the run-in string disengages from the cement retainer leaving behind the plug formed.
    Type: Application
    Filed: May 4, 2001
    Publication date: November 7, 2002
    Applicant: WEATHERFORD/LAMB
    Inventors: David Moore Tumlin, Gene K. Fugatt, David Hosie, MIke Luke