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Single cycle dart operated circulation sub

Wells – Valves – closures or changeable restrictors – Operated by dropped element
Reexamination Certificate

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Sliding sleeve devices and methods using O-ring seals as...

Wells – Valves – closures or changeable restrictors – Operated by dropped element
Reexamination Certificate

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System for running tubular members

Wells – Valves – closures or changeable restrictors – Operated by dropped element
Reexamination Certificate

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