Patents Represented by Attorney Bracewell & Giulieni LLP
  • Patent number: 7921908
    Abstract: A downhole pumping system includes a submersible pump assembly having a pump and a motor, and an inlet apparatus operably coupled to the submersible pump assembly. The inlet apparatus includes a tubular housing for connection to an intake of the pump, the housing having an axis and defining a plurality of circumferentially spaced apart apertures, a plurality of valve members, each valve member positioned within a corresponding aperture, and a plurality of spring members coupled to the housing, each spring member coupled to a corresponding valve member. At least a portion of one or more of the spring members and the valve members extend above the outer surfaces of the housing.
    Type: Grant
    Filed: September 18, 2008
    Date of Patent: April 12, 2011
    Assignee: Baker Hughes Incorporated
    Inventors: Steven K. Tetzlaff, Lance T. Robinson
  • Patent number: 7866721
    Abstract: An oilfield elevator including a locking mechanism operable by axial movement of the elevator's first body segment relative to its second body segment to control pivotal rotation about a hinge between the body segments; and an actuation lever positioned between the first body segment and the second body segment, the actuation lever including a protrusion thereon and being moveable to drive the protrusion against the first body segment to drive the first body segment axially relative to the second body segment.
    Type: Grant
    Filed: December 5, 2007
    Date of Patent: January 11, 2011
    Assignee: Tesco Corporation
    Inventor: Michael Andrew Hollin