Slotting geometry for metal pipe and method of use of the same
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United States of America Patent
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-
Jun 14, 2005
Grant Date -
Apr 3, 2003
app pub date -
Sep 27, 2002
filing date -
Sep 28, 2001
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A slotting geometry for a metal pipe for use in fabricating slotted liners. The slotting geometry includes one or more integral substantially continuous unslotted helical coils extending around a peripheral sidewall for sustantially the entire length of a tubular body. There are helical regions between the coils containing slots arranged to create generally trapezoidally shaped elongated struts joining the edges of adjacent coils. Ends of the tubular body have unslotted connecting portions, thereby facilitating connection with the tubular body. Slotted liners fabricated using this slotting geometry have the capability of having their outer diameter expanded or contracted. This has utility when inserting or removing the slotted liners iinto a well bore. By expanding or contracting the outer diameter, the slots can be made to be sider or narrower, this has utility in controlling slot width.
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