Patent ID: 7762336
Filing Date: 2010-07-27
Classification: E21B,Y10T

Abstract:
1. An apparatus for isolating a zone in a wellbore, the apparatus comprising: a body having a bore; a first flapper member and a second flapper member disposed in the bore, each flapper member selectively rotatable between an open position and a closed position multiple times, wherein the first flapper member is rotated from the open position to the closed position in a first direction and the second flapper member is rotated from the open position to the closed position in a second direction, wherein the first flapper member is operable to move to the open position after the second flapper member is in the open position; and a flapper latch assembly disposed in the bore, the flapper latch assembly movable between an unlocked position and a locked position, wherein the flapper latch assembly is configured to hold the first flapper member in the closed position when the flapper latch assembly is in the locked position.