Resources Contact Us Home
Variable choke valve

Image Number 11 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
System and method for providing security in browser-based access to smart cards
Information processing apparatus and method
Fabrication of high gradient insulators by stack compression
Traffic flow analysis mitigation using a cover signal
Vehicle detection apparatus and method using magnetic sensor
Image forming device
Apparatus for providing location information of hand-held device and method thereof
  Randomly Featured Patents
Chrysanthemum plant named `Yogigi Gold`
Restriction endonuclease Dra II
Method of production of non-aqueous electrolyte battery and seal plate thereof
Method and apparatus for loading syringes without the need for hypodermic needles
Dot matrix line printer
Method for forming a hydraulic cylinder assembly
Pick and place machine having improved centering jaws
Method and equipment for attenuation of oscillation in a paper machine or in a paper finishing device
Apparatus for hydroplastic processing of tubular products
Induction charger