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
System and method for confirming delivery of an electronic message
Monitoring apparatus for monitoring communication configurations of client devices
Switchable memory diodes based on ferroelectric/conjugated polymer heterostructures and/or their composites
System and method for video encoding
Non-volatile memory and method having efficient on-chip block-copying with controlled error rate
Rule-based stimulation program search
  Randomly Featured Patents
Bi-directional trimmer head spool with curved trimmer line guide
Combined electric drill and screwdriver
Strain Ophiobolus vermisporus FERM BP-1636
Magnetic toner
Display apparatus and method of manufacturing the same
Bag lamp frame kit
System for dynamic process assignment in a local area network and method therefor
Fixture for holding a hole-cutting tool having cutting edges to be ground
Friction type torque-limiting clutch brake which splits into halves for easy replacement
MRAM cell with reduced write current