A supporting device configured to support a pipeline on the bed of a body of water having a frame connectable in a sliding manner to a pipeline extending along a longitudinal axis between a laying vessel and the bed of a body of water; at least one floating body connected to the frame; and at least one connecting mechanism connecting the frame to the floating body and configured to define a distance between the axis of the pipeline and the floating body, so as to apply a torque to the portion of pipeline at the frame.

A supporting device configured to support a pipeline on the bed of a body of water having a frame connectable in a sliding manner to a pipeline extending along a longitudinal axis between a laying vessel and the bed of a body of water; at least one floating body connected to the frame; and at least one connecting mechanism connecting the frame to the floating body and configured to define a distance between the axis of the pipeline and the floating body, so as to apply a torque to the portion of pipeline at the frame.

A connecting device for supporting an apparatus configured to couple to a pipeline and having a coupling mechanism, which has a first portion configured to couple integrally to the apparatus, and a second portion, configured to be connected to a hoisting device, and selectively releasable from the first portion in a designated or given direction as a function of the relative position of, and the force exchanged between, the apparatus and the hoisting device.

A connecting device for supporting an apparatus configured to couple to a pipeline and having a coupling mechanism, which has a first portion configured to couple integrally to the apparatus, and a second portion, configured to be connected to a hoisting device, and selectively releasable from the first portion in a designated or given direction as a function of the relative position of, and the force exchanged between, the apparatus and the hoisting device.

A method has the following steps: a) providing an undersea foundation arranged on the bed of a body of water; b) laying a section of pipe and of an in-line structure on the foundation and allowing the section of pipe to freely self-orient on the foundation; c) placing at least one guide on the foundation on both sides of the section of pipe; d) blocking the guide on the foundation to laterally clamp the section of pipe with respect to the foundation, while authorizing a longitudinal movement of the section of pipe with respect to the guide.

A marine pipeline installation system for laying an offshore pipeline and/or installing a subsea riser includes a pipeline launch tower, a pipeline guide provided at an elevated position for guiding said pipeline to the pipeline launch trajectory along said tower, one or more tensioners, an abandonment and recovery (A&R) system including at least one A&R cable and associated A&R winch and a sheave arrangement with one or more sheaves supported by the pipeline launch tower at an upper position thereof. An auxiliary trolley is provided which is adapted to support the weight of the launched pipeline and which is movable along a rail in the pipeline launch trajectory when the one or more tensioner frames are in the retracted non-operable position, from a position above the uppermost tensioner to a position below the lowermost tensioner, the rail being supported by the pipeline launch tower.

A marine pipeline installation system for laying an offshore pipeline and/or installing a subsea riser includes a pipeline launch tower, a pipeline guide provided at an elevated position for guiding said pipeline to the pipeline launch trajectory along said tower, one or more tensioners, an abandonment and recovery (A&R) system including at least one A&R cable and associated A&R winch and a sheave arrangement with one or more sheaves supported by the pipeline launch tower at an upper position thereof. An auxiliary trolley is provided which is adapted to support the weight of the launched pipeline and which is movable along a rail in the pipeline launch trajectory when the one or more tensioner frames are in the retracted non-operable position, from a position above the uppermost tensioner to a position below the lowermost tensioner, the rail being supported by the pipeline launch tower.

The invention relates to a vessel comprising a moonpool, a firing line hoist system, a stationary main deck for storing equipment and/or tubulars, and a mobile working deck having a front deck section and a rear deck section. The working deck can be moved between a working position and a transporting position. A rear deck lift system is provided for lifting and lowering a rear deck section between the working position and the transporting position. A front deck guide system is provided for guiding a front deck section in a substantially horizontal direction between the working position and the transporting position.

The invention relates to a vessel comprising a moonpool, a firing line hoist system, a stationary main deck for storing equipment and/or tubulars, and a mobile working deck having a front deck section and a rear deck section. The working deck can be moved between a working position and a transporting position. A rear deck lift system is provided for lifting and lowering a rear deck section between the working position and the transporting position. A front deck guide system is provided for guiding a front deck section in a substantially horizontal direction between the working position and the transporting position.

Conductor identification may be provided. A first sleeve may be placed around a first conductor and a second sleeve around a second conductor. Next, a first tag may be placed on the first conductor and a second tag on the second conductor. Then, the first conductor and the second conductor may be pulled together through a conduit. The first conductor may slideably move through the first sleeve and the second conductor may slideably move through the second sleeve as the first conductor and the second conductor are pulled together through the conduit.