Patents by Inventor Walt R. Chapman

Walt R. Chapman 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).

  • Inserts with Swellable Elastomer Seals for Side Pocket Mandrels
    Publication number: 20100122819
    Abstract: Improved inserts for use in side pocket mandrels which include one or more annular sealing elements that are formed of an elastomeric material that swell in response to heat or fluid saturation. When the insert is emplaced within a side pocket mandrel, the swellable elastomer can then be swelled, using either heat or fluid saturation, to cause the sealing element(s) to expand and seal against the seal bore of the side pocket mandrel.
    Type: Application
    Filed: November 17, 2008
    Publication date: May 20, 2010
    Applicant: Baker Hughes Incorporated
    Inventors: Samuel L. Wildman, James H. Kritzler, Walt R. Chapman, Paul W. Atkins
  • Barrier orifice valve for gas lift
    Patent number: 7360602
    Abstract: Gas lift valve designs and gas lift systems are described that feature a positive closure mechanism that is highly resistant to significant wear or damage that would result in fluid leakage. A pivotable flapper member is incorporated into a gas lift valve and used as a flow control mechanism. The flapper member provides a positive barrier to fluid flow from the production tubing to the annulus, even after substantial wear or damage.
    Type: Grant
    Filed: February 3, 2006
    Date of Patent: April 22, 2008
    Assignee: Baker Hughes Incorporated
    Inventors: James H. Kritzler, James H. Holt, Vic Randazzo, Walt R. Chapman