Hybrid wellhead system and method of use
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United States of America Patent
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-
Jan 9, 2007
Issued Date -
N/A
app pub date -
Mar 17, 2004
filing date -
Oct 21, 2003
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A hybrid wellhead system is assembled using a plurality of threaded unions, such as spanner nuts or hammer unions, for securing respective tubular heads and a flanged connection for securing a flow control stack to a top of a tubing head spool. The tubing head spool is secured by a threaded union to an intermediate head spool. The intermediate head spool is secured by another threaded union to a wellhead. Each tubular head secures and suspends a tubular string in the well bore. The hybrid wellhead system is capable of withstanding higher fluid pressures than a conventional independent screwed wellhead, while providing a more economical alternative to a flanged, or ranged, wellhead system because it is less expensive to construct and faster to assemble.
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