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
Headset electronics
Coordinated garbage collection for raid array of solid state disks
Cognitive radio cooperative spectrum sensing method and fusion center performing cognitive radio cooperative spectrum sensing
Method and apparatus for sensing an input object relative to a sensing region of an ultrasound sensor device
Soft co-processors to provide a software service function off-load architecture in a multi-core processing environment
Method and system for electronic assistance in dispensing pharmaceuticals
Probe for ultrasound diagnostic apparatus
  Randomly Featured Patents
Surface emitting laser, manufacturing method of surface emitting laser, surface emitting laser array, manufacturing method of surface emitting laser array, and optical apparatus including surf
Waveform analyzer
Triazolyl thioamide derivates
Door lock for swinging door
Interior suspension lamp
Interchangeable lens for radiotelephones and similar articles
Unwinding apparatus for paper or board web rolls
Planar loop antenna
Two tier rectangular tissue box holder
Dual configuration speaker