Expander for expanding a tubular element

Details Expander for expanding a tubular element Expander for expanding a tubular element

2006-11-28

2006-11-28

Bagnell, David (Department: 3672)

Wells

Means for perforating, weakening, bending or separating pipe...

C166S216000, C166S381000, C072S370080

Reexamination Certificate

active

07140428

ABSTRACT:
A duplex expansion apparatus for expanding a wellbore tubular to two different diameters from an initial diameter is provided. The duplex expansion apparatus includes: a first diameter expansion cone that is, in a relaxed state, of a diameter less than the internal diameter and in an expanded state of a diameter greater than the internal diameter; a second diameter expansion cone that is, in a relaxed state, of a diameter less than the internal diameter and in an expanded state of a diameter greater than the diameter of the first diameter expansion cone in the expanded state; and an assembly mandrel that is capable of transferring both the first diameter expansion cone and the second diameter expansion cone into their expanded states.

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