Patents by Inventor Stewart R. Hollett

Stewart R. Hollett 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 sealing an annulus of a wellbore
    Patent number: 9127522
    Abstract: A well system (100) includes a production string (130) adapted to extend from a wellhead (120) to a subterranean zone (110). The production string (130) includes one or more joints of tubing comprising a bore; a seal (150) actuable by a specified pressure in the bore to substantially prevent fluid communication in an annulus (140) between a first portion of a wellbore (115) and a second portion of the wellbore (115), and an intervention sub (200) comprising a body (210) and a plurality of ports (228, 230) adapted to allow fluid communication between the bore and the annulus (140). The annulus is disposed between an exterior surface of the production string (130) and the wellbore (115). The intervention sub (200) further includes a seat (226) adapted to receive a plug (224) from the terranean surface (105) and seal the bore to substantially prevent fluid communication through the ports (228, 230).
    Type: Grant
    Filed: February 1, 2010
    Date of Patent: September 8, 2015
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Ian K. Kent, Stewart R. Hollett
  • METHOD AND APPARATUS FOR SEALING AN ANNULUS OF A WELLBORE
    Publication number: 20110259603
    Abstract: A well system (100) includes a production string (130) adapted to extend from a wellhead (120) to a subterranean zone (110). The production string (130) includes one or more joints of tubing comprising a bore; a seal (150) actuable by a specified pressure in the bore to substantially prevent fluid communication in an annulus (140) between a first portion of a wellbore (115) and a second portion of the wellbore (115), and an intervention sub (200) comprising a body (210) and a plurality of ports (228, 230) adapted to allow fluid communication between the bore and the annulus (140). The annulus is disposed between an exterior surface of the production string (130) and the wellbore (115). The intervention sub (200) further includes a seat (226) adapted to receive a plug (224) from the terranean surface (105) and seal the bore to substantially prevent fluid communication through the ports (228, 230).
    Type: Application
    Filed: February 1, 2010
    Publication date: October 27, 2011
    Inventors: Ian K. Kent, Stewart R. Hollett