Gripping assembly for expandable tubulars

Details Gripping assembly for expandable tubulars Gripping assembly for expandable tubulars

2007-12-11

2007-12-11

Bagnell, David (Department: 3672)

Wells

Expansible anchor or casing

C166S387000, C277S334000

Reexamination Certificate

active

11206692

ABSTRACT:
Grip between a tubular being expanded and the surrounding tubular is enhanced by disposing a wire in a groove. The wire is preferably harder than the surrounding tubular so that it can dig in upon expansion. The wire is mounted in the groove so that it is not stretched due to the expansion and for that reason doesn't increase the effort required for the expansion. The wire can take the shape of the groove that it is in or it can have some other shape. The wire can be solid or hollow and can be in segments such as rings or can be a longer continuously extending wire in a groove that, for example, can be helically disposed on the tubular being expanded or even on a sleeve surrounding it.

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