Abstract: A vehicle (10) for performing operations on a subsea pipeline, such as a riser (2), carries one or more interchangeable modules (18) and is configured to translate along the riser (2). The vehicle (10) comprises an elongate support structure (12) for carrying the modules (18). Gripper arms (14, 16) hold the support structure (12) a predetermined distance away from the elongate body and cause translation of the vehicle (10) along the riser (2) using a hand-over-hand action, so as to allow the vehicle (10) to pass protuberances or obstacles, such as a clamp (8), on the riser (2).

Abstract: A system (10) is provided for performing an operation on a subsea body (100), the system (10) comprises: a housing (20) configured to establish a sealed chamber around a section of the body (100); an environmental system configured to monitor and/or control an environment within the sealed chamber; and an operational tool (40) mounted to a positioning system (30) within the housing (20), wherein the operational tool (40) is configured to perform an additive manufacture operation on the body (100) within the sealed chamber. Also provided is a system (201) for performing an operation on an interior surface of a tubular body (200).

Abstract: A vehicle (10) for performing operations on a subsea pipeline, such as a riser (2), carries one or more interchangeable modules (18) and is configured to translate along the riser (2). The vehicle (10) comprises an elongate support structure (12) for carrying the modules (18). Gripper arms (14, 16) hold the support structure (12) a predetermined distance away from the elongate body and cause translation of the vehicle (10) along the riser (2) using a hand-over-hand action, so as to allow the vehicle (10) to pass protuberances or obstacles, such as a clamp (8), on the riser (2).