Multi-pressure regulating valve system for expander
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United States of America Patent
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N/A
Issued Date -
Jul 8, 2004
app pub date -
Jan 2, 2003
filing date -
Jan 2, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present invention provides a method and apparatus for regulating pressure within a closed expansion system. In one aspect of the invention, the apparatus comprises an expander tool comprising a first pressure regulation system disposed within an expansion chamber. The first pressure regulation system comprises two valves which regulate pressure within the expansion system during run-in. In another aspect of the invention, the apparatus comprises an expander tool comprising an expansion chamber in fluid communication with a second pressure regulation system. The second pressure regulation system regulates pressure during the expansion of a tubular. The second pressure regulation system comprises a frangible member and a valve in series, and optionally a pressure regulator downstream of the frangible member and valve in series. In another aspect of the invention, a method is provided for regulating pressure during the expansion process using the first and/or second pressure regulation system.
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