Patent ID: 8905129
Filing Date: 2014-12-09
Classification: E21B

Abstract:
1. A tubular closure assembly responsive to speed or velocity of an object, the tubular closure assembly comprising: at least one sensor in operable communication with a passageway in an interior of a tubular, the at least one sensor sensing an object passing a first point and then a second point within the passageway of the tubular; a processor receiving an output from the at least one sensor and calculating speed of the object from the first point to the second point; a control panel receiving information from the processor; and, a closure system movable between an open condition allowing passage of the object through the passageway and past the closure system and a closed condition configured to block the passageway of the tubular and prevent further progress of the object through the passageway, the closure system activatable to the closed condition by the control panel in response to the object moving from the first point to the second point at speed faster than a preset value or at a velocity outside a preset range.