Abstract: A device for transporting and placing a bridge (1) of an offshore oil rig onto a floating or stationary mounting structure (3). The device has two parallel floating barges (10) for mounting the bridge (1). Each barge has a set of vertical movement rams (11) that move the bridge between a position of bearing on the barges (10) and a position of bearing on the structure (3). Each barge (10) has at least one assembly (15) for controlling the roll of each barge (10) in relation to the bridge (1) during the placement of the bridge onto the mounting structure (3). The assembly includes at least two rams (16) that are carried by the barge (10) and are located on both sides of the longitudinal axis of the barge (10). Each ram (16) is connected to the bridge (1) by a connecting member (17) that has rigid pull and flexible compression.

Abstract: This method comprises cooling the feed natural gas in a first heat exchanger and introducing the cooled, feed natural gas into a first separation flask. It comprises the dynamic expansion of a turbine supply flow in a first expansion turbine and introducing the expanded flow into a separation column. This method comprises removing, at the head of the separation column, a head flow rich in methane and removing a first recirculation flow from the compressed head flow rich in methane. The method comprises forming at least a second recirculation flow obtained from the head flow rich in methane downstream of the separation column and forming a dynamic expansion flow from the second recirculation flow.

Abstract: The disclosure relates to a flexible underwater pipe intended for transporting fluids, notably hydrocarbons, comprising at least one layer comprising a polymeric resin comprising at least one polyhedral oligomeric silsesquioxane chemically bound to the polymer.

Abstract: This method comprises connecting a downstream point (40) of a pipe (24) to a buoy (26) and completely submerging the buoy (26). It comprises deploying in the body of water (12) an intermediate section (30) of the pipe (24) from the downstream point (40) to at least as far as an upstream point (38), anchoring the upstream point (38), and tensioning the intermediate section (30) to keep it vertical. The height of the buoy (26) is less than 1.5 times its greatest transverse dimension. The method comprises moving the buoy (26) between a remote position and an installed position in line with an anchoring region, keeping the buoy (26) partly submerged on the surface (16) of the body of water.

Abstract: The invention relates to a riser pipe installation that comprises a flexible duct of the non-bound type, the duct being vertically arranged between a mechanical connection with a submerged buoy at the stub on the one hand, and a mechanical connection with the seabed at the bottom on the other hand, wherein fluid connections are provided at the stub and at the bottom for connecting the riser pipe with surface equipment on the one hand and bottom equipment on the other hand; the bottom of the pipe is located at a depth of at least 1000 m where it is submitted to a computable maximum reverse bottom effect F, while the buoy is oversized in order to generate at the bottom of the riser pipe a reaction tension T higher than at least 50% or even 100% of the computable maximum reverse bottom effect F applied at the bottom of the pipe.

Abstract: A structure for transport and offshore installation of at least one wind turbine or underwater generator includes a U-shaped floating hull having lateral arms. Each lateral arm has at least one leg vertically movable by the hull in flotation, and at least one assembly for supporting a wind turbine or underwater generator. The assembly includes two shuttles opposite each other and each combined with a leg and each having higher and lower pairs of arms which are pivotably movable between a retracted position and an active position tilted against a mast of the wind turbine or underwater generator.

Abstract: The present invention provides a system and method that keeps a barge and grillage system on the barge in compression with a topsides supported by the grillage system during the transport, while providing a quick release system between the barge, grillage system, and topsides during an installation procedure that transfers the topsides to an offshore platform. The quick release system can be in tension to apply a compressive force between the grillage system and the topsides until the quick release system is released.

Abstract: The structure (10) for transporting and installing or retrieving underwater equipment comprises a floating hull (11) equipped with legs (20) that can be moved vertically relative to the floating hull (11), a platform (60) carried by shuttles (30) each associated with a leg (20) and able to be moved vertically relative to the hull (11) by said legs (20), means of temporarily anchoring the equipment to the underside of the platform (60) and means (65, 66) of moving said equipment in the water between a first position pressed against the anchoring means and a second position away from said means.

Abstract: The disclosure provides a method and system of installing subsea well trees, comprising: creating a glory hole having a depth below a seabed at a well location of a hydrocarbon reservoir; moving a floating offshore platform coupled with a foundation, the platform having a topsides and a caisson with downwardly extending walls defining an inner volume between the walls, the foundation coupled to the caisson walls, and the caisson walls having adjustable buoyancy; lowering the offshore platform with the foundation into the glory hole; drilling from the topsides into the hydrocarbon reservoir below the foundation to create a well; installing a well tree on the well, the well tree being disposed in the glory hole below the height of the seabed; coupling the well tree to a flow line; releasing the offshore platform from the foundation; and reusing the offshore platform to install other foundations at other predetermined well locations.

Abstract: The disclosure provides an installation method to deploy the flexible pipe below the water, utilizing supporting equipment between a flexible pipe and intended connections. In addition, the method of connection and pull down can maintain control of the flexible pipe subsea throughout the method with limited or no surface intervention. This installation method provides a redundancy as the connector approaches in a subsea connection in at least one embodiment. The method utilizes combinations of buoyancy elements, hand-off sequences, and pull down equipment, such as subsea winches and wire rope, to accomplish such connections with limited or no surface intervention.

Abstract: The present disclosure provides an improved design for a multi-sectional truss spar hull platform having a truss and a spar hull. One or more sections can be transported to a designated location and off-loaded into water from an available transport vessel. The truss includes a skirt tank at the upper end of truss that can be coupled to the lower end of the hull. The skirt tank can provide buoyancy during float-off and mating operations to the hull. The skirt tank is designed to allow the portion above the water to be coupled to the hull in a first orientation, the truss with the skirt tank rotated with the hull in the water to a second orientation to expose the previously underwater portion, and then the previously underwater portion can be coupled together above the water. The integral skirt tank will be flooded after the spar hull is up-ended.

Abstract: Burner for a furnace comprising at least one supply channel for supplying an oxidizing medium and a plurality of peripheral fuel supply channels, wherein the channels have exit openings arranged adjacent each other at a burner end surface for forming during use upon reaction of supplied fuel with supplied oxidizing medium a flame front, wherein the exit openings are asymmetrically arranged with respect to any plane arranged transverse to the end surface of the burner and extending through a burner central axis whereby the distribution of the fuel exit openings and/or the dimension of the fuel exit openings and/or the exit angle of the fuel exit openings and/or the shape of the fuel exit openings are arranged asymmetrically to said any plane, such that during use a flame front is created that is asymmetrical with respect to said any plane.

Abstract: An undersea flexible pipe for conveying hydrocarbons, the pipe including from the inside to the outside an inner sealing sheath, at least one ply of traction armors wound about the inner sealing sheath, a deformable holding layer including at least one flexible ribbon or holding band wound about the traction armor ply, and at least one tubular structure surrounding the holding layer, wherein the ribbon includes fiber strands oriented substantially in the longitudinal direction of the ribbon. The ribbon is covered by a reinforcing layer of a polymer material for the deformation resistance of the holding layer.

Abstract: The invention relates to a method for evaluating the fatigue life of a polymer composition, including the following steps: i) providing a polymer composition; ii) manufacturing a plurality of axisymmetric test tubes cut from said composition; iii) subjecting said test tubes to a uniaxial traction fatigue test including a plurality of loading and unloading cycles for the test tube, the geometry of the test tube making it possible to subject the material to triaxial stresses, in the area of the test tube cut, simulating the stress conditions for the pressure sheath of a flexible pipe, particularly for off-shore use; and iv) predetermining the number of cycles until the rupture of said polymer composition. The invention is related to the use of said polymer composition selected through the predetermining method for manufacturing pipes or conduits to convey a pressurized and/or corrosive fluid.

Abstract: The disclosure reduces vertical movement of a floating offshore platform by including a centralized open keel plate coupled to the hull that allows water below and above the keel plate. As the floating platform moves vertically, the keel plate separates the water and causes drag on the platform. The water moving vertically with the plate also increases the dynamic mass. The drag results in less vertical movement of the offshore platform without the need to extend legs of the platform to gain an equivalent reduction in vertical movement. The added dynamic mass increases the natural period of the vertical motion away from the wave excitation period to minimize the wave driven motion. The keel plate generally is above or at the same level of the keel, and therefore would not reduce the clearance between the seabed and the keel of the hull at the quayside.

Abstract: The method according to the invention comprises the separation of a feed stream (16) into a first fraction (60) and a second fraction (62) and the injection of at least part of the second fraction (62) into a second dynamic expansion turbine (46) to form a second expanded fraction (80). It comprises the cooling of the second expanded fraction (80) through heat exchange with at least part of the first headstream (84) coming from a first column (28) and the formation of a second feed stream (82) of the first column (28) from the second cooled expanded fraction.

Abstract: A device includes a hollow rigid member (40) and a curvature limiter (42) movable relative to the hollow rigid member (40). A releasable device (46) for axial immobilization of the curvature limiter (42) on the flexible line (18) in at least one first direction along a travel axis (X-X?). The axial immobilization device (46) includes a locking member (90) axially secured to the flexible line (18), and a member (92) for fitting the locking member (90), axially secured to the curvature limiter (42). Those members (90, 92) are movable relative to each other around the travel axis (X-X?) between a configuration for axial immobilization of the flexible line (18) on the curvature limiter (42), and a configuration for axial travel of the flexible line (18) across the curvature limiter (42).

Abstract: The present disclosure provides a disk for reducing scour around a pile, such as a monopole, installed in the seabed. The disk has a pile opening through which the pile protrudes. The disk includes a peripheral skirt for embedding into the seabed below the portion of the disk installed above the seabed. The disk can include partitions for segmenting chambers of the disk. The disk can include mesh on the top, bottom, or both surfaces with one or more fill bags installed in the chambers. The disk can include chambers that can be filled with fluidized fill material, such as grout or concrete. The fill material can be inserted into the fill bags through conduits with valves that can be remotely operated with an ROV. The fill material can also be injected below the disk using the conduits for support on the seabed.

Abstract: This installation comprises a transport conduit which is at least partially submerged in a body of water, a device for conveying fluid between the vessel and the conduit, and a floating platform for securing the vessel. The platform comprises a carrier structure which is partially submerged in the body of water. The carrier structure comprises an open-work trellis which delimits internal spaces which are for circulation of water and which open in the body of water. The floating platform further comprises flexible lines for anchoring the carrier structure to the bottom of the body of water. The ratio of the volume of the internal spaces to the total of the volume of the open-work trellis and the volume of the internal spaces is greater than 0.9.

Abstract: A pipe stalk for a pipe-in-pipe pipeline, the pipe stalk including an outer pipe and at least one inner pipe located within the outer pipe, and having a retaining assembly moveable between a first configuration for preventing axial movement of the inner pipe with respect to the outer pipe in a downwards direction and a second configuration for allowing axial movement of the outer pipe with respect to the inner pipe, whereby axial movement of the inner pipe with respect to the outer pipe can be prevented when the outer pipe is held during welding to an adjacent pipe stalk.