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US09441454B2 Gravel pack apparatus having actuated valves 有权
具有致动阀的砾石充填装置

Gravel pack apparatus having actuated valves
Abstract:
A device and method allows a bore valve in the washpipe and in certain instances a port valve or sliding sleeve to open or close upon command from the surface so that gravel slurry may be placed in a wellbore.
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