| 摘要 |
A wellbore tool 100 for selectively isolating a wellbore zone. The tool 100 has a bore with a first flapper 125 member and a second flapper member 150 disposed therein. Each flapper member is initially in an open position. The first flapper member 125 is moved to a closed position by rotating it in one direction and the second flapper member 150 is moved to a closed position by rotating it in an opposite. The first flapper member may be rotated towards an upper end of the tool to close the first flapper member and the second flapper member may be rotated toward a lower end of the tool to close the lower flapper member. Each flapper member is movable between the open position and the closed position multiple times. |
