Resources Contact Us Home
Bi-directional fluid loss device and method

Image Number 2 for United States Patent #7252153.

A fluid loss device including a flapper and seat assembly that provide a seal on a lower flapper surface when the flapper is closed and resists pressure in either direction. The flapper and seat assembly is spring biased to contact a flapper support above the flapper to resist deformation of the flapper due to a pressure differential from below the flapper. The flapper and seat assembly may be moved by tubing pressure to release an opening prop that opens the flapper. The valve seat may include an elastomeric seal element to improve the fluid flow restriction. The flapper and seat assembly is also biased upward by a pressure differential from below to above the flapper, to thereby increase the flapper to valve seat pressure as the fluid pressure differential increases.

  Recently Added Patents
System for highlighting targets on head up displays with near focus plane
Method and apparatus for controlling power supply
Electrode structure and its manufacturing method, and semiconductor module
Remote ignition system for a vehicle and method for securing a remote ignition function
Change management automation tool
Kit and method for the capture of tumor cells
Reaction medium for detecting and/or identifying bacteria of the Legionella genus
  Randomly Featured Patents
Device for improving drainage of the aqueous humor within the eye of a living being
Skateboard tool
Plants and seeds of corn variety I059952
Method for detecting motion vectors for use in a segmentation-based coding system
Debris resistant internal tubular testing system
Juice extractors with splash prevention
Micro-pulsed plasma thruster having coaxial cable segment propellant modules
MOS semiconductor device and method of manufacturing the same
Semiconductor device with a solder creep-up prevention zone
Remote procedure callback system and method