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US 2009/0151924 A1Published application
Downhole tool with shape memory alloy actuator
AssigneeBaker Hughes Incorporated
InventorGary B. Lake
Life of this patent
Estimating the term…
Abstract
A downhole tool actuator includes a shape memory material; a pulley system engaged with the shape memory material and fixed in position; and a downhole tool component operatively connected to the shape memory material and moveable in response to a phase change of the shape memory material from a martensitic phase to an austenitic phase and method.
Claims15
A downhole tool actuator comprising:
- a shape memory material;
- a pulley system engaged with the shape memory material and fixed in position;
- and
- a downhole tool component operatively connected to the shape memory material and moveable in response to a phase change of the shape memory material from a martensitic phase to an austenitic phase.
1 more element
A subsurface safety valve comprising:
- a housing;
- a flapper pivotally mounted at the housing;
- and
- a shape memory material wire fixedly attached to the flapper and fixedly attached to the housing, the wire having a first length allowing the flapper to be in a closed position and a second length causing the flapper to open.
1 more element
A safety valve comprising:
- a housing;
- a flow tube disposed at the housing;
- and
- a shape memory material actuator fixed to the housing at one end thereof and to the flow tube at the other end thereof, the actuator urging the flow tube into a position associated with a valve open condition when the actuator is transitioned to an austenitic phase.
1 more element
A method for actuating a safety valve comprising:
- affixing one end of a shape memory material in a martensitic phase to a housing of the valve;
- affixing the other end of the material to a movable valve component;
- and
- heating the material to a temperature associated with phase transition to an austenitic phase.
1 more element
Dependencies are inferred from the claim text.