Abstract: A subsea trencher for arranging at least partly into the seabed a subsea pipeline, includes at least one cart that separately carries at least one trench tool and is configured to run along the subsea pipeline. trench tool is configured to work the seabed underneath the subsea pipeline. A subsea support frame carries heavy subsea equipment connected to the trench tool for operating the trench too. When the subsea support frame is fixed to the cart, the subsea trencher is configured to load the assembled weight of the cart and subsea support frame onto the subsea pipeline as the subsea trencher runs on the subsea pipeline. When the subsea support frame is separate from the cart, the subsea support frame is configured to be suspended above the seabed or arranged beside the subsea pipeline at a distance from the subsea pipeline as the cart runs along the subsea pipeline.

Abstract: A subsea trencher for arranging at least partly into the seabed a subsea pipeline, includes at least one cart that separately carries at least one trench tool and is configured to run along the subsea pipeline. The trench tool is configured to work the seabed underneath the subsea pipeline. A subsea support frame carries heavy subsea equipment connected to the trench tool for operating the trench too. When the subsea support frame is fixed to the cart, the subsea trencher is configured to load the assembled weight of the cart and subsea support frame onto the subsea pipeline as the subsea trencher runs on the subsea pipeline. When the subsea support frame is separate from the cart, the subsea support frame is configured to be suspended above the seabed or arranged beside the subsea pipeline at a distance from the subsea pipeline as the cart runs along the subsea pipeline.

Abstract: An abandonment and recovery system for a subsea pipeline. The system according includes a pipeline attachment assembly configured to be attached to a pipeline end; and a cable attachment assembly configured to be attached to at least one abandonment and recovery cable. The bendable connection has, over the distance thereof, an essentially constant circumferential shape and an essentially constant size.

Abstract: Vortex Induced Vibration (VIV) suppression strakes, in particular VIV suppression strakes are arranged on subsea pipelines. A VIV suppression strake assembly includes a strake fin support shell that is configured to be arranged against the outer surface of a section of pipe and at least one strake fin having a fin tip and a fin base. The strake fin support shell includes an aperture that is configured for inserting the fin therein, and the fin is provided at the fin base with an anchor, which anchor is configured for engaging the fin support shell on the pipe side of the aperture. The aperture is a slot dimensioned to allow the fin to be inserted in the slot from the pipe side of the slot with the fin tip leading until the fin base engages the shell.

Abstract: Vortex Induced Vibration (VIV) suppression strakes, in particular VIV suppression strakes are arranged on subsea pipelines. A VIV suppression strake assembly includes a strake fin support shell that is configured to be arranged against the outer surface of a section of pipe and at least one strake fin having a fin tip and a fin base. The strake fin support shell includes an aperture that is configured for inserting the fin therein, and the fin is provided at the fin base with an anchor, which anchor is configured for engaging the fin support shell on the pipe side of the aperture. The aperture is a slot dimensioned to allow the fin to be inserted in the slot from the pipe side of the slot with the fin tip leading until the fin base engages the shell.

Abstract: An abandonment and recovery system for a subsea pipeline. The system according includes a pipeline attachment assembly configured to be attached to a pipeline end; and a cable attachment assembly configured to be attached to at least one abandonment and recovery cable. The bendable connection has, over the distance thereof, an essentially constant circumferential shape and an essentially constant size.

Abstract: The present invention relates to a method for lowering a subsea structure to be installed on the seabed into the water through the splash zone, said subsea structure comprising subsea equipment arranged on a substantially flat support base for preventing the subsea equipment to sink into the seabed. The method according to the invention comprises: lifting the subsea structure into the air in a horizontal position in which the flat support base extends substantially parallel to the horizontal plane; tilting the subsea structure while suspended in the air from the horizontal position into a tilted position in which the flat support base is angled with respect to the horizontal plane; lowering the subsea structure into the water through the splash zone in the tilted position; and tilting the subsea structure while suspended in the water below the splash zone back into the horizontal position.

Abstract: The present invention is for coating a surface area of a gap in the coating of a pipeline, said surface area having a length along the central longitudinal axis of the pipeline and a width of at least part of the circumference of the pipeline. The device according to the invention comprises: a frame; a spray nozzle support element supporting a number of spray nozzles; a linear motion mechanism configured for translating the spray nozzle support element relative to the frame and parallel to a longitudinal axis of the frame; and support members configured for arranging the frame stationary relative to the pipeline with said longitudinal axis of said frame coinciding with the central longitudinal axis of the pipeline.

Abstract: The present invention relates to a method for filling a gap (13) in the coating (5) of a pipeline coated with a coating, in particular a thermo-insulating coating. The method according to the invention comprises the steps of placing in the gap (13) a mixture of solid elements and a thermoplastic polymeric material in fluid state, and letting the thermoplastic polymeric material in fluid state solidify.