Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Vincenzo Barbato0
Date of Patent
April 10, 2018
0Patent Application Number
147940660
Date Filed
July 8, 2015
0Patent Citations Received
Patent Primary Examiner
Patent abstract
A wellbore dart or pill is provided with a lock such that upon reaching a corresponding key, dogs are extended radially outward to engage with a tool within the wellbore. Typically the dart will include a lock section having a number of pins wherein each pin must be depressed a proper amount where the amount includes not being depressed to allow a tumbler within the dart to move either rotationally or axially walking a dog in an outward condition.
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