Resources Contact Us Home
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
Making transparent capacitor with multi-layer grid
Light fixture
Illuminating device
Document-related representative information
Semiconductor fin device and method for forming the same using high tilt angle implant
Compositions substantially free of sodium chloride and methods for the storage of red blood cells
Contact detection between a disk and magnetic head
  Randomly Featured Patents
Bath accessory base
Process for the purification of sugarbeet juice and increasing the extraction of sugar therefrom
1H-indazoles, benzothiazoles, 1,2-benzoisoxazoles, 1,2-benzoisothiazoles, and chromones and preparation and uses thereof
Multicolor organic EL element having plurality of organic dyes, method of manufacturing the same, and display using the same
Hair clip
Epoxy compound and method for manufacturing the same
Method of creating a weld in a wellbore
Heat-sensitive recording material
Circulating shift register time-keeping circuit
Control system for automatic transmission