Mechanism for activating a plurality of downhole devices
AssigneeSchlumberger Technology Corporation
InventorsKuo-Chiang Chen, Hitoshi Tashiro, Iain Cooper, Jahir Pabon, Murat Ocalan
Life of this patent
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Abstract
A mechanism for selectively activating a plurality of downhole pathways including a) a valve having: i) a sleeve coupled for movement between an open and normally closed position; and ii) a valve magnet set mounted to the sleeve; and b) a dart for pumping in hole including a dart magnet set matched to the valve magnet set such that the dart couples to the valve when in close proximity and, in turn, the sleeve moves from the closed position to the open position.
Claims20
A mechanism for selectively activating a plurality of downhole pathways comprising:
- a) a valve including:
- i) a sleeve coupled for movement between an open and normally closed position;
- and ii) a valve magnet set mounted to the sleeve;
- and
- b) a dart for pumping in hole including a dart magnet set matched to the valve magnet set such that the dart couples to the valve when in close proximity and, in turn, the sleeve moves from the closed position to the open position.
A mechanism for selectively activating a plurality of downhole devices comprising:
- first means for triggering a device by moving from an off position to an on position;
- and
- second means for moving the first means from the off position to the on position wherein the device is a valve, the first means is a sliding valve sleeve having a coded valve magnet set, and the second means is a dart having a coded dart magnet set such that the coded valve and dart magnet sets are uniquely matched to create an attractive force when in close proximity.
A method for selectively activating a triggering mechanism on a plurality of downhole valves comprising the steps of:
- pre-determining combinations of coded magnets such that each valve sleeve of the downhole valve includes a valve magnet set that is only attracted to unique dart magnet set mounted on an activation dart;
- and
- opening the downhole valves in a sequence by selecting a sequence of unique darts to be pumped in hole.
Dependencies are inferred from the claim text.