Patent ID: 8505623
Filing Date: 2013-08-13
Classification: E21B

Abstract:
1. A bridge plug, comprising: a tailpiece defining at least one port; a mandrel connected to the tailpiece and being movable from a first position to a second position relative to the tailpiece, the mandrel defining an internal passage communicable with the at least one port; an engagement assembly disposed on the mandrel and being engageable with a surrounding wall; and a valve disposed in the internal passage of the mandrel, the valve comprising a releasing sleeve defining an internal bore at least partially disposed on a portion of the tailpiece, the releasing sleeve being movable on the tailpiece relative to the at least one port from a first condition to a second condition, the valve in the first condition preventing fluid flow between the internal passage and the at least one port, the valve in the second condition moving the mandrel from the first position to the second position relative to the tailpiece and allowing fluid communication between the valve and the at least one port, wherein the mandrel in the second position allows the engagement assembly to disengage from the surrounding wall.