Abstract: An abandonment and recovery head apparatus comprising a head member, a lift member moveably coupled to the head member, and a retaining device operable to hold the lift member in an accessible position.

Abstract: A field coating system comprises a chassis and a plurality of modules coupled to the chassis.

Abstract: The present invention relates to an anchoring method and device, for anchoring a pipeline to a seabed. The pipeline may extend from a well which is located on a seabed to a floating platform. Tension forces which are exerted on the pipeline by the platform are diverted into the seabed by the anchoring device.

Abstract: A method and apparatus for near vertical laying of a pipeline offshore by a pipe laying vessel includes a tower to which is attached a strongback that load pipe sections from a supply point on the vessel into the tower where the lower end of the pipe section is welded onto the upper end of a pipe line that extends into the sea while the strongback returns to the supply point for a second pipe joint. Where the pipe section includes a bulky item such as a valve assembly box, after the pipe section has been welded to the pipeline the pipe section is moved generally horizontally out of the tower and a hoisting cable lowers the pipe section to a predetermined depth below the tower. The hoisting cable then returns the pipe section and attached pipeline to their original position.

Abstract: A method of fitting a lining in a pipeline is disclosed comprising the steps of providing a flexible tubular liner having a cross section sized to fit the pipeline, attaching a pig which is a close fit in the pipeline to an end of the liner and locating the pig in the pipeline. The liner is compacted to a reduced cross-section on or prior to entry to the pipeline to facilitate passage of the liner along the pipeline, and a fluid pressure is applied to the pig to cause the pig to pass along the pipeline and, to draw the liner into the pipeline.

Abstract: The method for removing or positioning a structure (103) which is erected on either an underwater bed or anchored to the underwater bed entails the use of a hoisting mechanism. When the structure (103) is being removed, it is detached from the underwater bed. Then, the structure (103) is connected to a hoisting mechanism which is arranged on a separate hoisting vessel (100). The structure is hoisted up by the hoisting mechanism and is attached to a transport vessel (1) in such a manner that it can tilt about a horizontal axis. Then, the structure is tilted into a substantially horizontal position. The structure is positioned in the reverse order.

Abstract: A method and apparatus for near vertical laying of a pipeline offshore by a pipe laying vessel includes a tower to which is attached a strongback that load pipe sections from a supply point on the vessel into the tower where the lower end of the pipe section is welded onto the upper end of a pipe line that extends into the sea while the strongback returns to the supply point for a second pipe joint. Where the pipe section includes a bulky item such as a valve assembly box, after the pipe section has been welded to the pipeline the pipe section is moved generally horizontally out of the tower and a hoisting cable lowers the pipe section to a predetermined depth below the tower. The hoisting cable then returns the pipe section and attached pipeline to their original position.

Abstract: A line up and connection installation comprises an elongated pipe receiving structure, a line up device for lining up double-walled pipes or pipe components and a connection station for connecting the lined up pipes or pipe components. The line up device has at least two gripper means. The gripper means are each movable in translation in a plane which lies substantially perpendicular to the axial direction of the pipe receiving structure. At least one of the gripper means is movable in the axial direction of the pipe receiving structure. The line up device positions a first pipe or component in such a manner with respect to a second pipe or component that they can be connected to one another at their ends in a connection station.

Abstract: A line up and connection installation comrises an elongated pipe receiving structure, a line up device for ligning up double-walled pipes or pipe components and a connection station for connecting the lined up pipes or pipe components. The line up device has at least two gripper means. The gripper means are each movable in translation in a plane which lies substantially perpendicular to the axial direction of the pipe receiving structure. At least one of the gripper means is movable in the axial direction of the pipe receiving structure. The line up device positions a first pipe or component in such a manner with respect to a second pipe or component that they can be connected to one another at their ends in a connection station.

Abstract: The invention relates to a method for removing or positioning a structure (103) or a part (107) of a structure which is erected on an underwater bed or anchored to the underwater bed. When the structure (103) is being removed, it is detached from the underwater bed. Then, the structure (103) is connected to a hoisting mechanism which is arranged on a separate hoisting vessel (100). The structure is hoisted up by the hoisting mechanism and is attached to a transport vessel (1) in such a manner that it can tilt about a horizontal axis. Then, the structure is tilted into a substantially horizontal position. The structure is positioned in the reverse order.

Abstract: The disclosure relates to a method of laying a seabed pipeline from a surface vessel (10, 11) in which the vertically oriented lengths of pipe are assembled to form pipe strings suspended vertically from the vessel extending towards the seabed. An end (30) of a previously laid length of pipeline(29) is supported above the seabed by a tether (28) extending to the surface vessel to locate an upwardly facing end of the pipeline at a predetermined level below the vessel corresponding generally to the length of the pre-assembled pipe strings. A further pipe string (31) is then maneuvered from the vessel until the lower end of the string is aligned with the end of the pipeline, after which the pipe string is lowered to engage its lower end with the upwardly facing end of the pipeline.

Abstract: The disclosure relates to a method of laying a seabed pipeline from a surface vessel. Pipe strings are assembled from their upper ends from the vessel for attachment in a pipeline extending from the vessel to the seabed. An upper end of a pipe string is attached to a trailing end of a pipeline, the pipeline is guided through a generally semi-circular curved path having an upwardly directed entry and a downwardly directed exit from where the pipeline extends to the seabed. The vessel is moved forwardly while guiding the pipeline around said curved path so that the pipe string passes around the path and is then released in a downwards direction towards the seabed until the trailing end of the pipe string is above sea level.