DOWNHOLE TOOL CONTROL

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United States of America Patent

APP PUB NO 20140231096A1
SERIAL NO

14182132

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A method of operating a downhole tool in a no-flow configuration in which a piston and a flow-restriction cooperate to occlude a tool throughbore. The tool is reconfigured to an intermediate configuration by flowing fluid through the tool at an intermediate flow-rate lower than an operating flow-rate and axially translating the piston to an intermediate position in which the piston and flow-restriction cooperate to define an intermediate flow area. Axial translation of the piston between a no-flow position and the intermediate position includes an occlusional stage of a first axial extent during which the piston and the flow-restriction occlude the tool throughbore, and a transitional stage of a second axial extent during which the piston and the flow-restriction cooperate to provide a step-change in flow area. The tool is reconfigured to an operating configuration by flowing fluid through the tool at the operating flow-rate and axially translating the piston.

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Patent Owner(s)

Patent OwnerAddress
NOV DOWNHOLE EURASIA LIMITEDGLOUCESTERSHIRE GL10 3RQ

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Eddison, Alan Martyn York, GB 31 958

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