Abstract: A heated subsea pipe and process for transporting fluids, includes a plurality of pipe sections each having a transport tube for receiving the fluids, an electrically insulating inner layer arranged around the transport tube, a sealing tube made of electrically conductive material arranged around the electrically insulating inner layer, a thermally insulating outer layer arranged around the sealing tube. The transport tube is electrically connected to the sealing tube at each of the two ends of the pipe. The pipe includes two electrical cables connected to an electric generator and, to the transport tube and to the sealing tube of the pipe at a point situated between the two ends of the pipe to produce two parallel electrical circuits each traversed by an electric current for heating the transport tube of the pipe by Joule effect.

Abstract: A method and system for tensioning a hyperstatic system involves two structures connected to each other, including: a) connecting, by at least one non-adjustable tendon and at least one adjustable tendon which is formed by a tendon coupled to a cylinder in an initially retracted position, an upper structure to a lower structure which is positioned below the upper structure while maintaining zero tension in the tendons; step b) applying a force to the upper structure and/or the lower structure in order to tension each adjustable tendon and to deploy the respective cylinder thereof, the tension of each non-adjustable tendon remaining at zero; and step c) progressively increasing the force until the tension of each non-adjustable tendon reaches a threshold value which brings about a load transfer from the lower structure to the upper structure to allow the lower structure to be supported by the upper structure.

Abstract: A method and a system for the time determination of a phase interface level of a multiphase fluid present in a vertical pipe, include placing a distributed optical fiber sensor comprising an optical fiber cable wound in spiral around the pipe and optically coupled to a DAS interrogator, determining, from the data acquired by the DAS interrogator, the power spectral density over a predetermined duration and for each point of a discretized length of the optical fiber cable, integrating the power spectral density over a predefined frequency band for each point of the discretized length of the optical fiber cable, and setting in matrix form the results of the integration of the power spectral density in order to determine at least one interface level of the multiphase fluid.

Abstract: A method for determining the linear electrical resistance in AC mode of a steel pipeline, including the steps of generating in a portion of the pipeline an induced current by means of an induction coil centered on a longitudinal axis of the pipeline and traversed by an AC current. The coil is housed in a yoke made of ferromagnetic material in order to confine the magnetic field to a predefined surface of the pipeline portion, measuring the active power dissipated by the pipeline portion subjected to the magnetic field, measuring the amplitude of the produced magnetic field, and determining the linear electrical resistance in AC mode of the pipeline portion from the measurements of the dissipated active power and the amplitude of the induced magnetic field. A device is provided for implementing such a method.

Abstract: A method and system for Direct Electrical Heating of a Pipe-In-Pipe pipeline for transporting fluids includes mechanically connecting the steel inner shell to the steel outer shell at different intervals of the pipeline, establishing an electrical and thermal insulation between the inner shell and the outer shell, applying an alternating electric current between an outer surface of the inner shell and an inner surface of the outer shell over the entire length of the pipeline so as to heat the inner shell of the pipeline by Joule effect, and placing on the outer surface of the inner shell at least one layer made of resistive and ferromagnetic material so as to increase the ratio of electric power transmitted to the inner shell.

Abstract: A facility and a method for processing gas from a subsea gas production field, includes a cooling module supplied with a gas/liquid mixture coming directly from at least one subsea gas field, and a gas/liquid separation module which delivers processed gas to a gas export pipeline and liquid to a liquid export pipeline. The gas/liquid separation module includes a gas/liquid separator and a coalescing filter separator which are connected in series. The gas/liquid separator has a gas outlet connected to an inlet of the coalescing filter separator and a liquid outlet connected to the liquid export pipeline. The coalescing filter separator having a gas outlet connected to the gas export pipeline and a liquid outlet connected to the liquid export pipeline.

Abstract: A device for jointing elements of a pipeline for the transport of fluids includes a support structure on which a pipeline section to be jointed is intended to be mounted, two parallel fixed rails, four plates each comprising a first element capable of cooperating with a rail and a second element fixed on the support structure. The first and the second elements of each plate is linked by a first cylinder aligned along a first adjustment axis and a second cylinder aligned along a second adjustment axis, and a system for controlling the cylinders of the plates to achieve movements along the first and second adjustment axes and capable of cooperating with a system for guiding in translation the support structure along the longitudinal axis of the pipeline section to allow jointing of the pipeline section and the pipeline element.

Abstract: A device for jointing elements of a pipeline for the transport of fluids includes a support structure on which a pipeline section to be jointed is intended to be mounted, two parallel fixed rails, four plates each comprising a first element capable of cooperating with a rail and a second element fixed on the support structure. The first and the second elements of each plate is linked by a first cylinder aligned along a first adjustment axis and a second cylinder aligned along a second adjustment axis, and a system for controlling the cylinders of the plates to achieve movements along the first and second adjustment axes and capable of cooperating with a system for guiding in translation the support structure along the longitudinal axis of the pipeline section to allow jointing of the pipeline section and the pipeline element.

Abstract: A method for producing a steel underwater pipe for carrying a corrosive fluid, includes the successive steps: applying a layer of corrosion-resistant steel alloy on a terminal part of the internal wall of each pipe element from its end to be welded; the application of a plastic coating, on the internal wall of each pipe element; covering only a first part of the layer of metal alloy, a terminal part of the layer of metal ally on the side of the end to be welded of each pipe element not being covered by the plastic coating; the coaxial insertion and the crimping of a compression ring against the terminal part of the plastic coating; and the assembly by welding directly together the ends of two pipe elements by a corrosion-resistant steel alloy weld.

Abstract: A device for jointing elements of a pipeline for the transport of fluids includes a support structure on which a pipeline section to be jointed is intended to be mounted, two parallel fixed rails, four plates each comprising a first element capable of cooperating with a rail and a second element fixed on the support structure. The first and the second elements of each plate is linked by a first cylinder aligned along a first adjustment axis and a second cylinder aligned along a second adjustment axis, and a system for controlling the cylinders of the plates to achieve movements along the first and second adjustment axes and capable of cooperating with a system for guiding in translation the support structure along the longitudinal axis of the pipeline section to allow jointing of the pipeline section and the pipeline element.

Abstract: A method for producing a steel underwater pipe for carrying a corrosive fluid, includes the successive steps: applying a layer of corrosion-resistant steel alloy on a terminal part of the internal wall of each pipe element from its end to be welded; the application of a plastic coating, on the internal wall of each pipe element; covering only a first part of the layer of metal alloy, a terminal part of the layer of metal ally on the side of the end to be welded of each pipe element not being covered by the plastic coating; the coaxial insertion and the crimping of a compression ring against the terminal part of the plastic coating; and the assembly by welding directly together the ends of two pipe elements by a corrosion-resistant steel alloy weld.

Abstract: A subsea installation for heating a two-phase liquid/gas effluent circulating within a subsea casing, includes a plurality of heated pipe sections which are successively connected to one another by curved pipe sections to form a heating coil, each heated pipe section being inclined with respect to the horizontal at an angle comprised between 2 and 10° in order to promote a distributed flow regime of the two-phase effluent and being provided with an induction heating system.

Abstract: A process and a device for determining the volume of liquid remaining inside a flexible pouch provided with means for dispensing the liquid to be consumed comprises placing the pouch inside a rigid envelope filled with a known volume V1 of a first measuring liquid having an electrical conductivity C1, during the dispensing of a volume VA of liquid to be consumed, admitting inside the rigid envelope the same volume of a second measuring liquid present outside the rigid envelope and having an electrical conductivity C2 different from the electrical conductivity C1, measuring the electrical conductivity CM of the mixture of the measuring liquids present inside the rigid envelope, determining the volume VA of liquid to be consumed which has been dispensed from the measurement of the electrical conductivity C3, and calculating the volume Vr of liquid to be consumed remaining inside the pouch from the volumes Vi and VA.

Abstract: A facility for the subsea disposal of the water produced during deepwater hydrocarbon production, includes a subsea oil/water separation station fed with fluids coming directly from at least one hydrocarbon production well, operating at a pressure independent of and lower than the ambient pressure, and comprising an oil outlet for connecting to a production unit and a water outlet, a flat gravity oil/water separation tank resting on the seabed, continuously fed with water leaving the oil/water separation station, operating at a pressure substantially equal to the ambient pressure, and comprising an oil outlet for connecting to the production unit and a water outlet, and a subsea high-pressure pump connected to the water outlet of the oil/water separation station and to a water inlet of the tank to raise the pressure of the water leaving the oil/water separation station to the ambient pressure before it is admitted into the tank.

Abstract: Installation for producing fluid such as crude oil having a floating support having at least two tanks, an undersea bottom-to-surface connection pipe having a first pipe portion on the sea bottom from a well head to the bottom end of a second pipe portion at the floating support, a first auxiliary pipe for transporting gas extending from the floating support to the bottom end of the second pipe, and a plurality of valves for isolating or putting into communication the first auxiliary pipe, for isolating or putting into communication the first production pipe portion and the second production pipe portion, end to end, and suitable for isolating or putting into communication the proximal end of the first production pipe portion and the bottom end either of a fourth auxiliary pipe rising directly to the surface, or a bottom portion of the first auxiliary pipe.

Abstract: The invention concerns a method for installing a tubular metal pile (28) in a rocky ground, successively comprising drilling the rocky ground (6) in order to form a cavity (14) of predetermined diameter and depth, filling the cavity with a granular material (18), arranging the granular material present in the cavity by vibration, and installing the pile in the cavity.

Abstract: A system for collecting solid particles accumulating at the bottom of a subsea oil/water separation station of an installation for the subsea disposal of water produced during the deepwater subsea production of hydrocarbons, comprises at least one vertical drainage channel intended to open into a lower part of a horizontal body (of the oil/water separation station, a discharge pipe to be positioned horizontally under the horizontal body of the oil/water separation station and into which the drainage channel opens, and a high-pressure slurry ejector having a suction port connected to the discharge pipe via a supply valve.

Abstract: A method of connecting together two unit elements (4, 4?) of a fluid transport pipe, each unit pipe element being covered in an outer insulating coating (6, 6?) made of a thermoplastic material, with the exception of an end portion that does not have an outer insulating coating. The method includes: a step of welding together two abutting unit pipe elements; a step of positioning an annular sleeve (14) around a cut-back and in part around the outer insulating coatings of the two unit pipe elements, the sleeve being made of a thermoplastic material; a step of fastening the sleeve in sealed manner by weld bonding on the outer insulating coatings; and a step of applying an external pressure on the sleeve to enable it to be deformed elastically and match the shape of the respective end portions of the two unit pipe elements.

Abstract: The invention concerns an underwater water treatment unit which has specific cleaning means which are suitable for cleaning filtration membranes in the unconventional conditions associated with use at great or very great depths, as well as a method for cleaning the membrane of the underwater water treatment unit.

Abstract: A method of heating an inner pipe of a set of coaxial pipes, wherein the inner pipe is heated by induction using an electromagnetic induction coil (5) surrounding the outer pipe coaxially, the coil passing electrical power at a frequency lower than 100 Hz optimized for maximum energy efficiency of Joule effect heating of the inner pipe. A device (8) is also provided for induction heating an inner pipe of coaxial pipes, the device has a) an induction heater having at least one electromagnetic induction coil (5) coaxially surrounding the outer pipe of the coaxial pipes, and b) a raising device (9) for raising a portion (1-2) of coaxial pipes (1) above the sea bed (13) together with the induction coil(s) (5) surrounding it.