Patents by Inventor Alistair Tennant

Alistair Tennant 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).

  • LANDING STRING
    Publication number: 20140190703
    Abstract: A landing string for use in deploying equipment between a surface vessel and a subsea well comprises a separation assembly configured to permit relative movement of upper and lower regions of the landing string upon exposure to a predetermined load.
    Type: Application
    Filed: July 24, 2012
    Publication date: July 10, 2014
    Applicant: Expro North Sea Limited
    Inventors: Alistair Tennant, Paul Deacon
  • BALL VALVE
    Publication number: 20140175317
    Abstract: A ball valve comprises a housing, a ball seat arranged in the housing and a ball member mounted within the housing and being rotatable relative to the ball seat between open and closed positions. The ball seat and ball member define respective through bores each having a bore edge, wherein the bore edge of at least one of the valve seat and ball member defines a recessed cutting region for cutting a body extending at least partially through the valve upon closure of the ball member.
    Type: Application
    Filed: July 24, 2012
    Publication date: June 26, 2014
    Applicant: Expro North Sea Limted
    Inventor: Alistair Tennant
  • VALVE
    Publication number: 20140174755
    Abstract: A valve comprises a valve mechanism located within a housing arrangement, wherein the housing arrangement comprises an outer housing configured to be mechanically secured with a fluid conduit system, and an inner housing located within the outer housing and configured to contain pressure.
    Type: Application
    Filed: July 24, 2012
    Publication date: June 26, 2014
    Inventors: Craig Mitchell, Keith Taylor, Alistair Tennant