Abstract: A flexible pipe system includes an unbonded flexible pipe connected to a floating vessel and a sensor system with an optical fibre integrated in the unbonded flexible pipe. Interrogating equipment transmits optical signals into the fibre, receives optical signals reflected from the fibre and detects a parameter of the unbonded flexible pipe. A turret connects the flexible pipe rotationally to the floating vessel via a swivel device that provides a fluid transfer passage between the turret and the vessel. The interrogating equipment is arranged on the turret and is further configured to transfer signals indicative of the detected parameter to receiving equipment on the floating vessel. In this way, optical signals reflected from the fibre can reach the interrogating equipment without distortion in the swivel, so that parameters can be detected with sufficient quality also for floating vessels equipped with a turret mooring system.

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: A flexible pipe system includes an unbonded flexible pipe connected to a floating vessel and a sensor system with an optical fibre integrated in the unbonded flexible pipe. Interrogating equipment transmits optical signals into the fibre, receives optical signals reflected from the fibre and detects a parameter of the unbonded flexible pipe. A turret connects the flexible pipe rotationally to the floating vessel via a swivel device that provides a fluid transfer passage between the turret and the vessel. The interrogating equipment is arranged on the turret and is further configured to transfer signals indicative of the detected parameter to receiving equipment on the floating vessel. In this way, optical signals reflected from the fibre can reach the interrogating equipment without distortion in the swivel, so that parameters can be detected with sufficient quality also for floating vessels equipped with a turret mooring system.

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: 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 an unbonded flexible pipe comprising an internal sheath, at least one armor layer surrounding said internal sheath and a bore defined by said internal sheath, the flexible pipe further comprising a fiber sensor arranged in said bore. By arranging the fiber in the bore of the unbounded flexible pipe, new opportunities for sensing desired properties of the unbounded flexible pipe is provided. The fiber sensor may preferably be a pressure fiber sensor. The unbonded flexible pipe may preferably be an offshore pipe, such as a riser for transportation of hydrocarbons.

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 system comprising an unbonded flexible pipe having a center axis and a sensor system at least partly integrated in the unbonded flexible pipe. The unbonded flexible pipe has a length and a longitudinal direction along the length and comprises an inner sealing sheath and at least a first sensor containing armoring layer. The first sensor containing armoring layer comprises a plurality of elongated armoring elements arranged around the internal sealing sheath. The sensor system comprises: a plurality of optical fiber sensor units, at least one light pump for the optical fiber sensor units, a data collecting unit, and a computing unit. The optical fiber sensor units are optically connected to the data collecting unit, and the data collecting unit is in data communication with the computing unit. At least one of the elongated armoring elements of the first sensor containing armoring layer is a sensor containing element.

Abstract: The invention relates to an armouring element for an unbonded flexible pipe. The armouring element has a longitudinal axis and an elongated outer shape along said axis. The armouring element further has a longitudinal recess configured for fully or partly taking up a sensor element. The recess has a recess surface area and at least a surface area fixing part of the recess surface area has a surface finish comprising a surface roughness Ra. The invention further relates to an armouring element assembly and an unbonded flexible pipe comprising the armouring element, and a method of producing an armouring element assembly.

Abstract: The invention relates to a pipe system comprising a pipe, a gas sensing station and a remote output system. The pipe comprises a pipe gas cavity, such as an annulus, extending lengthwise in part or all of the length of the pipe; the gas sensing station comprises a sensing gas cavity which is in gas communication with the pipe gas cavity: The sensing gas cavity comprises a photoacoustic spectroscope. The pipe system comprises at least one optical feeding fiber for feeding light to the photoacoustic spectroscope and a transmission path for transferring a signal from the photoacoustic spectroscope to the remote output system, the transmission path from the gas sensing station to the remote output system is an optical transmission path. The pipe may for example be a flexible pipe e.g. an umbilical or a pipe for the transportation of crude oil from a well to an off shore or on shore station, for example a ship or a platform. The gas sensing station may be integrated in the pipe, e.g.

Abstract: The invention relates to a pipe system comprising a) a pipe, b) a fluid sensing station and c) a remote light detector system. The pipe comprises a flow channel and an annular fluid cavity surrounding the flow channel. The fluid sensing station comprises a sensing fluid cavity which is in fluid communication with the annular fluid cavity, and the sensing fluid cavity comprises a light emitter and a light receiver placed at a distance from each other. The light emitter and the light receiver are optically connected to each other and optically connected to the remote light detector system. The invention also relates to a fluid sensing system for sensing a fluid in an annulus cavity of a pipe, said fluid sensing system comprises a fluid sensing station and a remote light detector system. The fluid sensing station comprises a sensing fluid cavity comprising a light emitter and a light receiver placed at a distance from each other and optically connected to each other.

Abstract: The invention relates to a flexible pipe system comprising an unbonded flexible pipe having a centre axis and a sensor system at least partly integrated in the unbonded flexible pipe. The unbonded flexible pipe has a length and a longitudinal direction along the length and comprises an inner sealing sheath and at least a first sensor containing armoring layer. The first sensor containing armoring layer comprises a plurality of elongated armoring elements arranged around the internal sealing sheath. The sensor system comprises: a plurality of optical fiber sensor units, at least one light pump for the optical fiber sensor units, a data collecting unit, and a computing unit. The optical fiber sensor units are optically connected to the data collecting unit, and the data collecting unit is in data communication with the computing unit. At least one of the elongated armoring elements of the first sensor containing armoring layer is a sensor containing element.

Abstract: The invention relates to an unbonded flexible pipe comprising an internal sheath, at least one armor layer surrounding said internal sheath and a bore defined by said internal sheath, the flexible pipe further comprising a fiber sensor arranged in said bore. By arranging the fiber in the bore of the unbounded flexible pipe, new opportunities for sensing desired properties of the unbounded flexible pipe is provided. The fiber sensor may preferably be a pressure fiber sensor. The unbonded flexible pipe may preferably be an offshore pipe, such as a riser for transportation of hydrocarbons.

Abstract: The invention relates to a pipe system comprising a pipe, a gas sensing station and a remote output system. The pipe comprises a pipe gas cavity, such as an annulus, extending lengthwise in part or all of the length of the pipe; the gas sensing station comprises a sensing gas cavity which is in gas communication with the pipe gas cavity: The sensing gas cavity comprises a photoacoustic spectroscope. The pipe system comprises at least one optical feeding fiber for feeding light to the photoacoustic spectroscope and a transmission path for transferring a signal from the photoacoustic spectroscope to the remote output system, the transmission path from the gas sensing station to the remote output system is an optical transmission path. The pipe may for example be a flexible pipe e.g. an umbilical or a pipe for the transportation of crude oil from a well to an off shore or on shore station, for example a ship or a platform. The gas sensing station may be integrated in the pipe, e.g.

Abstract: The invention relates to a pipe system comprising a) a pipe, b) a fluid sensing station and c) a remote light detector system. The pipe comprises a flow channel and an annular fluid cavity surrounding the flow channel. The fluid sensing station comprises a sensing fluid cavity which is in fluid communication with the annular fluid cavity, and the sensing fluid cavity comprises a light emitter and a light receiver placed at a distance from each other. The light emitter and the light receiver are optically connected to each other and optically connected to the remote light detector system. The invention also relates to a fluid sensing system for sensing a fluid in an annulus cavity of a pipe, said fluid sensing system comprises a fluid sensing station and a remote light detector system. The fluid sensing station comprises a sensing fluid cavity comprising a light emitter and a light receiver placed at a distance from each other and optically connected to each other.

Abstract: An object comprising a body part having an electrically insulating outer surface part, and a first layer arranged on the outer surface part. The first layer is formed by one or more electrically conducting materials and defines one or more conducting paths between a first area of the outer surface part and a second area of the outer surface part. Thereby electrical signals may be transferred between the first and second area parts. The layer further defines a sensing device, which is thereby embedded into the object. The object is provided with a threaded portion defining an outer thread. Thereby the object may easily be fitted into an opening having a mating inner thread. The object may be in the form of an ordinary bolt with a sensing device embedded in a surface part thereof.

Abstract: An object comprising a body part having an electrically insulating outer surface part, and a first layer arranged on the outer surface part. The first layer is formed by one or more electrically conducting materials and defines one or more conducting paths between a first area of the outer surface part and a second area of the outer surface part. Thereby electrical signals may be transferred between the first and second area parts. The layer further defines a sensing device, which is thereby embedded into the object. The object is provided with a threaded portion defining an outer thread. Thereby the object may easily be fitted into an opening having a mating inner thread. The object may be in the form of an ordinary bolt with a sensing device embedded in a surface part thereof.