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
Inter vehicle communication system
Denial of service (DoS) attack prevention through random access channel resource reallocation
Computer product, information retrieval method, and information retrieval apparatus
Image forming apparatus having a primary transfer unit, a secondary transfer unit, and a direct transfer unit
Method for producing a flexible composite elastomeric polyurethane skin
Transmission terminal, transmission system, transmission method, and recording medium storing transmission control program
Coated article and method for making the same
  Randomly Featured Patents
Film formation apparatus and method of using the same
Aerial work platform assembly using composite materials
Gear drive for shuttleless looms
Method of manufacturing a semiconductor device
Thermal printer with means for reducing color shifts
Automatic clear circuit
Magnetic field generation
Plate mounting system, especially for signposting purposes, and connecting element therefor
Cleaning solvent and cleaning method for metallic compound
Electrochemical grinding with a conductivity-controlled wheel electrode