Wells – Conduit wall or specific conduit end structure – Downhole coupling or connector
Patent
1993-04-20
1995-01-10
Dang, Hoang C.
Wells
Conduit wall or specific conduit end structure
Downhole coupling or connector
166212, 1662411, E21B 1710
Patent
active
053798384
ABSTRACT:
A system for centralizing casing pipe in a wellbore includes lateral pistons in the side wall of the casing string which are movable by force applied to their inner end, from a retracted position within the maximum exterior profile of the casing pipe string to a predetermined extended position which will move the casing pipe string toward a central position in the borehole. Various well operations can be performed using the pistons in addition to the centralizing function. When a predetermined deploying force is applied to the pistons, they are released from their retracted position for movement to a fixed extended position. The deploying force is accurately determined by a simple retaining mechanism involving a snap ring and groove on the pistons.
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Moran Larry K.
Moyer Wilber R.
Wilson Dennis R.
Conoco Inc.
Dang Hoang C.
Holder John E.
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