PNEUMATIC ROTATING CONTROL DEVICE LATCH

摘要

A rotating control device can include an engagement member that secures relative to an outer housing an annular seal and/or a bearing, the member displacing in response to a pneumatic pressure differential. A method can include applying a pneumatic pressure differential, thereby displacing an engagement member that secures an annular seal relative to an outer housing, with rotation of the seal relative to the housing being permitted when the member is displaced to a position in which removal of the seal from the housing is prevented. A rotating control device can include a piston and an engagement member which secures an annular seal relative to an outer housing, the piston having piston areas exposable to a pneumatic pressure differential, and with increased pressure applied to another piston area of the piston displacing the piston to a position in which the member does not secure the seal relative to the housing.