De-trenching apparatus (100) for extracting a buried line, such as a cable or pipeline, is disclosed. The de-trenching apparatus comprises a channel (112) configured to receive a buried line to be extracted, the channel comprising a first flared opening (114) at a front end of the de-trenching apparatus and a second flared opening (115) at the rear end of the de-trenching apparatus, the first and second flared openings each having a curved surface (111) configured to support the line during extraction, and material removal means for removing material from around the buried line ahead of the de-trenching apparatus.

A method of emptying an undersea fluid transport pipe (2) that is submerged and full of water, by pumping out at least a portion of the water present inside the submerged pipe using a submersible pump unit (6) connected to a point of the pipe, the volume of water pumped out from the inside of the pipe being compensated by a gas injected under pressure into the submerged pipe from a point (18) thereof that is situated higher than the connection point (12; 14) to the submersible pump unit. The invention also provides an installation for performing such a method.

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.

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.

Pipe handling apparatus with an insert (4) configured to be inserted into a pipe to be handled (23). One or more clamping members (19) are moveably mounted relative to the insert. One or more actuators (17) are operable to urge the clamping members (19) towards the insert (4) thereby to grip the wall of the pipe to be handled (23). The insert (4) may be cylindrical. Multiple clamping members (19) may be spaced around the insert (4). The clamping members (19) may extend axially along the insert (4). The apparatus is suitable for handling flexible pipes (23) formed from multiple layers of helically wound metal strands.

The present invention addresses to equipment for collecting flexible pipes without the use of special vessels, using less costly resources and which are not committed to not damaging such equipment during handling, since it is applied to pipes at the end of their useful life or that are already damaged. These types of pipes represent a major liability for some oil industry operators. The technology to be used, in phases of demobilization of fields or even for collecting pipes with no prospect of use, uses vessels with minimal adaptations that rely on the presence of collecting/launching wheels with a much smaller diameter when compared to the wheels used in conventional vessels or, alternatively, the launch of a special collection coil with its own traction means to make it possible to wind the abandoned pipes, in the same place where they are launched, with subsequent collection of the set and transshipment to the vessel itself.

The invention relates to a device for landing or retrieving a pipeline end on the seabed, the device comprising an outboard connecting part (2) being adapted to connect with the pipeline end and lowered from the surface towards a landing structure (3) on the seabed or alternatively lifted from the landing structure (3) on the seabed towards the sea surface. The invention is distinctive in that the outboard connecting part (2) comprising a pair of guide funnels (5a, 5b) adapted to engage with a pair of corresponding guideposts (4a, 4b) arranged on the landing structure (3), at least one fin (8) is attached to the outboard connecting part (2) and is adapted to bear against the landing structure (3), said pair of guide funnels (5a, 5b) are adapted to be in contact with the corresponding pair of guideposts (4a, 4b) when the outboard connecting part (2) is resting on the landing structure (3).

The invention provides a method of emptying an undersea fluid transport pipe (2) that is submerged and full of water, the method comprising pumping out at least a portion of the water present inside the submerged pipe by means of a submersible pump unit (6) connected to a point of the pipe, the volume of water pumped out from the inside of the pipe being compensated by a gas injected under pressure into the submerged pipe from a point (18) thereof that is situated higher than the connection point (12; 14) to the submersible pump unit. The invention also provides an installation for performing such a method.

A vehicle and method of use in subsea operations related to crushing concrete mattresses including at least one lift assembly, at least one crushing roller, at least one blow out pipe cable of blowing crushed concrete mattress fragments into a rubble container. In a preferred embodiment, the vehicle has at least one fork lift connected to the lift assembly, a digger chain assembly arrangement, treads, an interface connected to the vehicle and capable of engaging the rubble container, and each rubble container is detachable from the interface.

Pipe handling apparatus with an insert (4) configured to be inserted into a pipe to be handled (23). One or more clamping members (19) are moveably mounted relative to the insert. One or more actuators (17) are operable to urge the clamping members (19) towards the insert (4) thereby to grip the wall of the pipe to be handled (23). The insert (4) may be cylindrical. Multiple clamping members (19) may be spaced around the insert (4). The clamping members (19) may extend axially along the insert (4). The apparatus is suitable for handling flexible pipes (23) formed from multiple layers of helically wound metal strands.