FIELD: drilling.
SUBSTANCE: invention relates to operations in a multilateral well and, in particular, to a drive for moving an isolating sleeve for operations in a multilateral well. The access system to the lateral wellbore for moving the isolating sleeve relative to the completion sleeve window for controlling access through the window includes a drive having a sleeve engaging mechanism and a drive mechanism. The insulating sleeve engaging mechanism is configured to engage with the insulating sleeve. The drive mechanism is made with the possibility of reciprocating movement in the longitudinal direction of the isolation sleeve relative to the mechanism of engagement of the isolation sleeve inside the bore of the completion collar to move in the longitudinal direction of the isolation sleeve within the channel relative to the completion collar window to adjust the position of the isolator relative to the completion collar window to provide or block access through the window into the channel. The well system includes a primary wellbore cased with a casing defining a casing outlet, a secondary wellbore extending from the casing outlet, and an isolation window assembly located within the primary wellbore. The isolation window includes a completion collar having a longitudinal axis, a conduit and a window extending at least partially along the longitudinal axis to provide access to the conduit, an isolation collar, and an actuator operatively connected to the isolation collar. The drive has a movement element movably connecting the first engaging sleeve and the second engaging sleeve, while the isolating sleeve passes through the first engaging sleeve and the second engaging sleeve to move in the longitudinal direction of the isolating sleeve inside the channel. To use the method for controlling access to the side bore, a reciprocating movement of the actuator is performed relative to the isolating sleeve for axial movement of the isolating sleeve.
EFFECT: improving the efficiency and accuracy of regulating access to the sidetrack of the well by eliminating the need to use tools from the surface.
15 cl, 7 dwg
