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
Early kill removal graphics processing system and method
Pre and post-paid real time billing convergence system
Selection of hash lookup keys for efficient retrieval
Hair care composition
Lens module and method for manufacturing thereof
Autonomous primary-mirror synchronized reset
Dual-leadframe multi-chip package and method of manufacture
  Randomly Featured Patents
Linear amplifier arrangement
Transverse field annealing process to form E.A.S. marker having a step change in magnetic flux
Printing apparatus and ink cartridge therefor
Hydrofoil sailing craft
Noise figure measurement of optical amplifiers by power substitution
Composition obtained from rice bran and use thereof
Hand held laser bar code reader with safety shutoff responsive to housing motion detector
Adjustable louver system for radiant heat transfer control in a direct-fired heater
Semiconductor device including a guard ring surrounding an inductor
Vital product data concentrator and protocol converter