Expandable wellbore stabiliser

Details Expandable wellbore stabiliser Expandable wellbore stabiliser

2006-12-05

2006-12-05

Bagnell, David (Department: 3672)

Wells

Guide for device or conduit

Surrounding existing device or tubing

C166S207000, C175S325500

Reexamination Certificate

active

07143825

ABSTRACT:
A stabiliser is disclosed for stabilising a radially expandable tubular element extending in a wellbore drilled into an earth formation. The stabiliser comprises a radially expandable tubular member selected from a section of the tubular element and a sleeve surrounding the tubular element, and at least one stabiliser arm connected to the tubular member, each arm being movable from a radially retracted position to a radially extended position by the action of a spring force. The stabiliser further comprises locking means arranged to lock each arm in the retracted position when the tubular element is in the unexpanded form and to unlock the arm upon radial expansion of the tubular member so as to allow the arm to move to the extended position thereof.

REFERENCES:
patent: 1997880 (1935-04-01), Watry
patent: 2035637 (1936-03-01), Crickmer
patent: 2004/0182571 (2004-09-01), Betts
patent: 99/18328 (1999-04-01), None
International Search Report dated Oct. 23, 2002.

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