A method for deployment of discrete lengths of flexible jumper pipes for installation subsea is provided, comprising coupling the jumper pipes together end-to-end thus forming a flexible train of jumper pipes, and winding the train of jumper pipes on a drum suitable for transport to a deployment site by a pipe-laying vessel. On site, the train of jumper pipes is unreeled from the drum until the first jumper pipe is lowered into the sea, then the drum is halted and the trailing end of the first jumper pipe is detached from the leading end of the second jumper pipe in the train of jumper pipes. The trailing end of the first jumper pipe is shifted to a lowering wire, and the first jumper pipe is lowered to the sea bottom. The process is repeated until the discrete lengths of flexible jumper pipes are individually lowered into the sea.

A coiled tubing deployment system includes an offshore rig having a reel positioned thereon and coiled tubing wound on the reel. A tubing guide is operatively coupled to receive the coiled tubing and to direct the coiled tubing into the water, with a weight sensor positioned to measure the weight of the portion of coiled tubing deployed into the water. A first set of bend sensors are positioned at a first location on the tubing guide to measure a real-time strain assumed by the tubing guide at the first location. A data acquisition system is communicably coupled to the weight sensor and the first set of bend sensors, and receives and processes weight measurement signals and bend sensor signals in order to provide an output signal indicative of a real-time bending fatigue of the tubing guide.

A marine pipeline installation vessel and a method are provided for laying an offshore rigid pipeline in the sea, the vessel at least being adapted to carry out the rigid reel lay method. The vessel includes at least one vertical storage reel for the storage of a spooled rigid pipeline. A left and right reel support structure are provided to support the weight of the at least one storage reel. The left and right support structures are embodied to form a pivoting structure allowing an angular adjustment of the horizontal reel axis about a vertical axis to alter the angular position of the at least one storage reel.

A buoyant conduit storage system comprising a reel for storing conduit and a drive arrangement for rotating the reel. The reel is rotatable about a substantially vertical axis of rotation to reel and/or unreel the conduit. The drive arrangement drives the reel at the axis of rotation. The buoyant storage system may provide for the storage and/or transportation and/or deployment of reelable conduit.

A system configured to handle reels for laying elongated members on the bed of a body of water, and in particular for transferring reels between an auxiliary structure and a laying vessel, has a bridge configured to connect the auxiliary structure and the laying vessel; and actuators configured to move a reel along and resting on the bridge.

A vessel is adapted to perform subsea wellbore related operations including module handling and laying flexible pipeline, e.g. wellbore intervention. The vessel includes a hull with a moonpool and a stationary drilling mast adjacent said moonpool. The front side of the drilling mast is provided with vertical trolley rails along whichduring module handlinga module handling trolley is movable. Further one or more tensioners are provided to engage a flexible pipeline, also being supported by the by the drilling mast. The tensioner frame of a tensioner is mounted pivotably about a vertical pivot axis to the drilling mast, such that the tensioner frame is pivotable between the pipeline laying configuration wherein the lower tensioner is provided in the module handling area and an open configuration wherein a vertical trolley path is unobstructed to allow module handling.

An improved system and method for laying on the seabed a pipeline and/or installing a subsea riser including one or more accessories are disclosed. In the system, a trolley rail for an auxiliary trolley is provided which includes a retractable trolley rail part supported by the tower via an associated mobile rail support assembly. Displacement of the retractable trolley rail part together with the auxiliary trolley when arranged on said retractable trolley rail part with respect to the tower is allowed, between an active position, wherein the auxiliary trolley is positioned to engage on an accessory in the firing line, and a retracted and non-operable position wherein a clear envelope about the firing line is created.

A pipe testing apparatus is described. The apparatus comprises two pipe end holders, respectively to hold a first and a second end of a pipe section under test; a reeling former; a straightening former; and a translator to effect relative translational movement of the pipe and the reeling former and of the pipe and the straightening former to cause the pipe to move selectively into and out of contact with and to apply a contact force against one or other of the reeling former and the straightening former. Each pipe end holder comprises a pipe end connector and an extending arm extending beyond the pipe end connector in a pipe longitudinal direction; and a lateral actuator is provided in association with each extending arm to apply a transverse load to the arm at a point distal from the pipe end connector. A pipe testing method is also described.

A marine pipeline installation system and marine pipeline installation method are disclosed. The marine pipeline installation system includes a pipeline launch tower for launching the pipeline in a firing line along the pipeline launch tower into the sea, and one or more tensioners supported by the pipeline launch tower. The system further includes a pipeline guide supported in a pipeline launch trajectory between a pipeline storage and the firing line above the one or more tensioners, wherein the pipeline guide is provided opposite the firing line relative to the pipeline launch tower. A guide support structure is provided, which is embodied as a single-sided guide support arm arranged on one side of the pipeline guide only.

A reelable mechanically lined pipe (MLP) (30) having at least a liner (32) and an outer pipe (34), the outer pipe having an outer diameter, DH, with the MLP formed from a plurality of pipe joints having conjoining girth welds (36), wherein the ends of each pipe joint terminate with clad overlay welds (40) having a length in the range L.sub.min=100 mm and L.sub.max=4D.sub.H, and wherein the liner thickness, t, is equal to or less than a value calculated by formula I as defined.