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

Image Number 10 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
Protective vest
Hand sign
Vacuum cleaner filter adapter ring
Validating the configuration of distributed systems
Distortion compensation device, distortion compensation method, and radio transmitter
Electrophoresis display having touch screen and method for driving the touch screen
Method for fabricating solar cell
  Randomly Featured Patents
Dermal uses of trans-retinoids for the treatment of cancer
Radioactive-ray image tube having input member formed of a clad material
Magnetic tape rotary headwheel assembly with venting means
Controlled auto-ignition lean burn stratified engine by intelligent injection
Preparation of light stable hops
Sodium cooled fast reactor
Polyfunctional urethane- or urea-containing oligomers and polymers prepared therefrom
Method for positioning optical subassembly for testing
Design and assisting system and method using electromagnetic position
High power factor, voltage-doubler rectifier