Slotting geometry for metal pipe and method of use of the same

Details Slotting geometry for metal pipe and method of use of the same Slotting geometry for metal pipe and method of use of the same

2005-06-14

2005-06-14

Bagnell, David (Department: 3672)

Wells

Processes

Placing or shifting well part

C166S233000, C166S207000

Reexamination Certificate

active

06904974

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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patent: 5366012 (1994-11-01), Lohbeck
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patent: 6382318 (2002-05-01), Whitlock
patent: 6523611 (2003-02-01), Bakker et al.
patent: 2003/0079886 (2003-05-01), Schetky et al.

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