Resources Contact Us Home
Variable choke valve

Image Number 7 for United States Patent #7377327.

Embodiments of the present invention generally provide a more reliable variable choke flow control valve. In one embodiment, a variable choke valve for use in a wellbore is provided. The valve includes a tubular housing having an axial bore therethrough and a port through a wall thereof. The valve further includes a tubular sleeve having an axial bore therethrough and first and second holes through a wall thereof and disposed within the housing. The first hole is larger than the second hole, and the sleeve is actuatable among three positions: a first position where the first hole is aligned with the port, a second position where the second hole is aligned with the port, and a third position where the sleeve wall is aligned with the port.

  Recently Added Patents
Reflective mask blank and method of manufacturing a reflective mask
Methods and systems for identifying and changing resolutions to cause an aspect ratio of a printed image to match an aspect ratio of image data
Interconnecting virtual domains
Anti-infective agents and uses thereof
Reading apparatus and reading method
Method and system for acquiring support capability of mobile terminal by base station side system
Power supply system for motor vehicle
  Randomly Featured Patents
Method of production of steel product with nanocrystallized surface layer
Fire/smoke protection structure for a plastic pipe or cable channel portion in a floor or wall
Airbag apparatus, folding method for airbag, and folding apparatus for airbag
Cathode ray tube coma correction device
Faucet assembly
Valve structure
Method and apparatus for user-defined managed objects
Cryptogram lock system with automatically variable true random code tonglingge
Hearing aid permitting simultaneous programming and adjustment with a single plug
Through-hole socket