Abstract: A plugging device, apparatus, and method. The plugging device includes an expandable member configured to move from a first, retracted position to a second, expanded position, a counter configured to count a number of restrictions in a conduit that the plugging device passes through, and an actuator configured to move the expandable member from the first position to the second position in response to the counter counting a predetermined number of restrictions. The expandable member in the expanded position prevents the plugging device from passing through a target restriction.

Abstract: A packer assembly which incorporates a swellable elastomeric packer element and one or more swellable thermoplastic components. The swellable thermoplastic components are support rings that are located at each axial end of the elastomeric element and provide positive mechanical backups for the elastomeric element to limit extrusion of the packer element.

Abstract: The invention refers to a device for sealing an annular space formed between an outer cylindrical element (4) having an end closure (16) and an inner pipe (1) extending within the outer element and having a free end. The invention incorporates a packer element (2) being slidably disposed around said pipe (1), an actuation element (6) adapted for telescopic assembly around the outer surface of the pipe (1) and slidable from a first position to a second position, a conical ring (12) adapted for installation on the pipe (1), where the actuation element (6) comprises an abutment element (10) designed for abutment against said packer (2), and an actuation pipe (8) extending beyond the pipe (1) first end when the actuation element (6) is in said first position. The invention also refers to a method for sealing the annular space.