Abstract: The present invention relates to a wave power device for extracting energy from water waves. The waver power device comprise a reference structure and effectors moving relative to the reference structure. The effectors are connected to two hydraulic rams, symmetrically positioned around each effector. The hydraulic rams have an effective hydraulic area which is stepwise increased as the length of the hydraulic rams are compressed and stepwise increased as the length of the hydraulic rams are increased.

Abstract: The present invention relates to an assembly including an end-fitting for terminating an unbonded flexible pipe and an unbonded flexible pipe. The unbonded flexible pipe includes a first and a second armour layer co-axially arranged, and an electric heating system. The end-fitting includes means for mechanically anchoring the first armour layer to the end-fitting and includes electrical connections for connecting the first armour layer to a power-source. The end-fitting also includes means for mechanically anchoring the second armour layer to the end-fitting. The first and the second armour layers are electrically insulated from each other by at least one electrically insulating layer in the end-fitting and the end-fitting includes a local volume in the end-fitting adjacent to the electrically insulating layer adapted for injection of a functional fluid.

Abstract: A method for producing a flexible pipe for offshore transport of fluids such as oil and gas, the method includes: extruding the internal pressure sheath of polymer material; winding one or more armor layers around the extruded internal pressure sheath; extruding the outer sheath of polymer material; at least one of the extruded sheaths of polymer material is extruded continuously along the length of the pipe wherein at least one zone A and at least one zone B are extruded along the length of the pipe and zone A is extruded from a polymer including polypropylene, and the extruded sheath in zone A has an Youngs-modulus EA zone B is extruded from a thermoplastic vulcanizate polymer, and the extruded sheath in zone B has an Youngs-modulus EB, where EB<0.9×EA and the polymers forming zone A and B are switched during extrusion to provide a continuous sheath.

Abstract: The present invention relates to a method of testing an unbonded flexible pipe. The unbonded flexible pipe has a length and a longitudinal axis and comprises, from the inside and out, an internal armour layer, an internal pressure sheath, at least one external amour layer and an outer sheath. At least one of the layers comprises an optical sensor connected to an optical monitoring system and at least one of the armour layers is a metallic and electrically conductive amour layer. The method makes it possible to test an electrical heating system and an optical sensor substantially simultaneously.

Abstract: The present invention relates to a method and a system comprising a floating unit for processing, handling or storing a fluid and at least one unbonded flexible pipe for transporting said fluid to the floating unit. The unbonded flexible pipe comprises an electric heating system, and the temperature of the fluid in the unbonded flexible pipe is measured and the measured temperature is used to control the electrical input to the electric heating system in the unbonded flexible pipe.

Abstract: The present invention relates to a wave power device for extracting energy from water waves. The waver power device comprise a reference structure and effectors moving relative to the reference structure. The effectors are connected 5 to two hydraulic rams, symmetrically positioned around each effector. The hydraulic rams have an effective hydraulic area which is stepwise increased as the length of the hydraulic rams are compressed and stepwise increased as the length of the hydraulic rams are increased.

Abstract: The invention concerns a flexible pipe for offshore applications, such as for use as a riser in oil production. The flexible pipe has a longitudinal axis and contains a pressure resilient core pipe structure with an inner surface defining a bore, and at least a pair of cross wound and non-bonded tensile armor layers surrounding said core pipe structure. The pressure resilient core pipe structure contains an embedded pressure armor structure, wherein the embedded pressure armor structure contains a plurality of layers of helically wound continuous fibers, wound with a winding angle of about 60 degrees or more relative to the longitudinal axis of the pipe and embedded in a cured polymer matrix. The fibers are individually bonded to the cured polymer matrix. Preferably each of said layers of helically wound continuous fibers have a fiber density of at least about 40%.

Abstract: The present invention relates to an assembly including an end-fitting for terminating an unbonded flexible pipe and an unbonded flexible pipe. The unbonded flexible pipe includes a first and a second armour layer co-axially arranged, and an electric heating system. The end-fitting includes means for mechanically anchoring the first armour layer to the end-fitting and includes electrical connections for connecting the first armour layer to a power-source. The end-fitting also includes means for mechanically anchoring the second armour layer to the end-fitting. The first and the second armour layers are electrically insulated from each other by at least one electrically insulating layer in the end-fitting and the end-fitting includes a local volume in the end-fitting adjacent to the electrically insulating layer adapted for injection of a functional fluid.

Abstract: The invention relates to an elongate reinforcement element for reinforcing an unbonded flexible pipe, a method of producing the elongate reinforcement element and an unbonded flexible pipe comprising the elongate reinforcement element. The reinforcement element comprises a plurality of elongate armor strips and an elongate support element comprising a channel, wherein the plurality of elongate armor strips are arranged in the channel of the elongate support element. Preferably the elongate armor strips are arranged to be superimposed in the channel and the plurality of superimposed elongate armor strips are displaceable in relation to each other upon bending of the elongate reinforcement element.

Abstract: The present invention relates to a method and a system comprising a floating unit for processing, handling or storing a fluid and at least one unbonded flexible pipe for transporting said fluid to the floating unit. The unbonded flexible pipe comprises an electric heating system, and the temperature of the fluid in the unbonded flexible pipe is measured and the measured temperature is used to control the electrical input to the electric heating system in the unbonded flexible pipe.

Abstract: The present invention relates to an unbonded flexible pipe having a length and a longitudinal axis and comprising, from the inside and out, a carcass, an internal pressure sheath, at least one external amour layer, and an outer sheath, the carcass comprises at least one elongate armour element helically wound to surround the center axis with a winding degree to the longitudinal axis. The elongate armour element is electrically conductive and comprises at least a first section and a second section along the length of the pipe where the electrical resistance of the first section is different from the electrical resistance of the second section.

Abstract: The present invention relates to a method of testing an unbonded flexible pipe. The unbonded flexible pipe has a length and a longitudinal axis and comprises, from the inside and out, an internal armour layer, an internal pressure sheath, at least one external amour layer and an outer sheath. At least one of the layers comprises an optical sensor connected to an optical monitoring system and at least one of the armour layers is a metallic and electrically conductive amour layer. The method makes it possible to test an electrical heating system and an optical sensor substantially simultaneously.

Abstract: An unbonded flexible pipe for offshore transportation of fluids from a subsea facility. The unbonded flexible pipe has a length along a longitudinal center axis, and a first and a second end, and a first end fitting connected to the first end. The unbonded flexible pipe comprises from inside and out an electrically conductive carcass, an electrically insulating innermost sealing sheath, at least one electrically conductive armor layer comprising at least one helically wound electrically conductive wire and an electrically insulating outer sealing sheath. At least the electrically conductive layers are mechanically terminated in the first end fitting and the pipe comprises electrical connections arranged to apply a voltage over the electrically conductive layers which electrically conductive layers are electrically connected at a distance along the length of the unbonded flexible pipe from the first end fitting of the unbonded flexible pipe to provide an electric circuit.

Abstract: The invention relates to a method of producing an unbonded flexible pipe and an unbonded flexible pipe. The method comprises providing an innermost sealing sheath defining a bore and a longitudinal axis, and a pressure armor layer surrounding the innermost sealing sheath. The pressure armor layer comprises at least one helically wound elongate armor element with at least one helical armor element gap between windings thereof, and the method comprises providing a foundation layer for the pressure armor layer. The foundation layer is provided with at least one helically shaped groove, and the elongate armor element is applied in the helically shaped groove, preferably such that the foundation layer at least partly fills the helical armor element gap, the foundation layer is preferably a fluid permeable foundation layer.

Abstract: The present invention relates to an unbonded flexible pipe including a bore for transport of a fluid wherein the unbonded flexible pipe includes an internal pressure structure including a fluid-tight polymer sheath and a barrier layer on the inside of the fluid-tight polymer sheath and bonded thereto, wherein the internal pressure sheath further includes a permeable protection sheath inside the fluid-tight polymer sheath and, wherein the barrier layer is located between the fluid-tight polymer sheath and the permeable protection sheath.

Abstract: The present invention relates to an offshore pipe system comprising a first unbonded flexible pipe and a second unbonded flexible pipe for transportation of fluids such as oil or gas. Each of the unbonded flexible pipes comprises a sealing sheath and an electrically conductive armor layer, and, moreover, the system comprises a first end fitting connected to the first end of the first unbonded flexible pipe and a second end fitting connected to the first end of the second unbonded flexible pipe. In the offshore pipe system the electrically conductive armor layer of the first unbonded flexible pipe is electrically connected with the electrically conductive armor layer of the second unbonded flexible pipe via a first electrical connection and a second electrical connection. To obtain an electrical circuit the first and second electrical connections are applied with a distance along the length of the first unbonded flexible pipe and the second unbonded flexible pipe, respectively.

Abstract: The invention concerns a flexible pipe for offshore applications, such as for use as a riser in oil production. The flexible pipe has a longitudinal axis and contains a pressure resilient core pipe structure with an inner surface defining a bore, and at least a pair of cross wound and non-bonded tensile armor layers surrounding said core pipe structure. The pressure resilient core pipe structure contains an embedded pressure armor structure, wherein the embedded pressure armor structure contains a plurality of layers of helically wound continuous fibers, wound with a winding angle of about 60 degrees or more relative to the longitudinal axis of the pipe and embedded in a cured polymer matrix. The fibers are individually bonded to the cured polymer matrix. Preferably each of said layers of helically wound continuous fibers have a fiber density of at least about 40%.

Abstract: A unbonded flexible pipe with a length and a longitudinal axis is described. The pipe comprises an innermost sealing sheath defining a bore, at least one armor layer surrounding the inner sealing sheath and at least one optical fiber containing layer, wherein the optical fiber containing layer comprises at least one tape and at least one optical fiber arranged with a length of at least about 3 times the length of the flexible pipe. In an embodiment the optical fiber is incorporated into the at least one tape of said optical fiber containing layer to provide an integrated fiber tape where advantageously the optical fiber is arranged with S-shaped folds.

Abstract: The invention relates to a flexible pipe comprising an axis and a tubular innermost sealing sheath surrounding said axis, said innermost sealing sheath being surrounded by at least one outer armoring layer. The innermost sealing sheath has an inner side which is the side of the innermost sealing sheath comprising said axis. On the inner side of said innermost sealing sheath the flexible pipe comprises at least one carcass comprising a plurality of annular armoring members.

Abstract: The invention relates to an unbonded flexible pipe for subsea transportation of fluids. The pipe has a length and comprises a tubular inner sealing sheath defining a bore and an axis of the pipe. In a pipe length section it comprises a second sealing sheath surrounding the inner sealing sheath and forming an annulus between the inner sealing sheath and the second sealing sheath. The annulus provides a primary maintaining passage along the length of the pipe length section with a first and a second end. The pipe comprises at least one secondary maintaining passage along the length of the pipe with a first and a second end. The secondary maintaining passage is arranged with an axial distance which is larger than the axial distance of the inner sealing sheath.