According to one embodiment, a rotationally activated downhole well valve for connection in a tubing string is disclosed that can be repeatedly opened and closed selectively to place the tubing string in communication with the annulus. The valve is moved between the closed position and the open position by rotating the string in the first direction.
申请公布号
SG191200(A1)
申请公布日期
2013.07.31
申请号
SG20130046487
申请日期
2012.01.13
申请人
HALLIBURTON ENERGY SERVICES, INC.
发明人
RINGGENBERG, PAUL, DAVID;CARDER, CHARLES, FREDERICK