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US Patent 8931565 Delayed opening wellbore tubular port closure

Patent 8931565 was granted and assigned to Packers Plus Energy Services Inc. on January, 2015 by the United States Patent and Trademark Office.

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Patent abstract

A wellbore tubular port closure system includes a mechanism to delay the opening of the port the port closure has been actuated to open. A port opening delay mechanism configured to act after actuation of the pressure responsive mechanism to delay full movement of the port-closure to the port-open position until after a selected time has lapsed.

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