Solids strainer system for a hydraulic choke
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United States of America Patent
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Oct 2, 2007
Grant Date -
Sep 20, 2007
app pub date -
May 4, 2007
filing date -
Jul 7, 2003
priority date (Note) -
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status (Latency Note)
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Abstract
The invention contemplates a strainer based upon a four-way, two-position rotary cylindrical plug valve having a hollow plug. The normal entry port for the sealing plug of the plug valve is a circular radial hole passing from the exterior of the plug into the interior cavity of the plug. The normal exit port for the sealing plug is a regular array of small holes across from and coaxial with the normal entry hole. The ports for the valve body are in two pairs positioned at 90.degree. from each other, with the axes of the ports lying in the same transverse plane as the ports of the valve plug.
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