Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Bi-directional fluid loss device and method










Image Number 6 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
Method of fabricating a solar cell with a tunnel dielectric layer
Buckle
Inhibitors of bacterial nitric oxide synthase, and related screening methods
Conductor-mixed active electrode material, electrode structure, rechargeable battery, and manufacturing method of conductor-mixed active electrode material
Clothes hanger
Analyte assaying by means of immunochromatography with lateral migration
Trimming circuit and semiconductor device
  Randomly Featured Patents
Thermoplastic seal and wrapping film
Error rate monitor
Biventricular pulsatile cardiac support system having a mechanically balanced stroke volume
Elevated frog and rail crossing track assembly
Compact pouch container and organizer for pastels
Heat exchanger with U-tubes
Preparation of transition metal catalysts from phosphonium salts
Fastener retention system
Ammoxidation of paraffins and catalysts therefor
Liquid-droplet jetting apparatus and liquid transporting apparatus