Abstract: A method for forming a composite fluid conduit includes providing an inner pipe having a variation in cross-section between at least two different longitudinal sections thereof and applying a fiber reinforced composite material to the inner pipe. In some disclosed examples the variation in cross section may be provided intermediate opposing ends of the inner pipe. In other disclosed examples the variation in cross section may be provided at an end region of the inner pipe.

Abstract: A method for joining primary and secondary members includes providing a primary member, a secondary member and a heating element which is joined to one of the primary and secondary members. The heating element includes an electrically insulating matrix material and an electrically conductive reinforcing element extending through the matrix material. The method further includes bringing the other of the primary and secondary members and the heating element into engagement and controlling a flow of electrical current in the reinforcing element so as to resistively heat and fuse at least some of the matrix material of the heating element with a matrix material of the other of the primary and secondary members. The method may be used to join a primary member such as a composite tubular and a secondary member such as a component for terminating the composite tubular.

Abstract: A composite fluid conduit assembly with a fluid conduit having a wall defining a fluid flow path is disclosed. The wall has an inner region and an outer region. The outer region includes a composite material having reinforcing elements within a matrix material and the inner region having a material which is substantially devoid of reinforcing elements. The inner region of the wall defines a first sealing surface around the fluid flow path at one end of the fluid conduit. The composite fluid conduit assembly has an interface member substantially devoid of reinforcing elements and located at the end of the fluid conduit. The interface member defines an aperture in fluid flow communication with the fluid flow path and a second sealing surface. A compression arrangement forces the interface member and the fluid conduit together forming a seal around the fluid flow path between the first and second sealing surfaces.

Abstract: A composite fluid conduit assembly with a fluid conduit having a wall defining a fluid flow path is disclosed. The wall has an inner region and an outer region. The outer region includes a composite material having reinforcing elements within a matrix material and the inner region having a material which is substantially devoid of reinforcing elements. The inner region of the wall defines a first sealing surface around the fluid flow path at one end of the fluid conduit. The composite fluid conduit assembly has an interface member substantially devoid of reinforcing elements and located at the end of the fluid conduit. The interface member defines an aperture in fluid flow communication with the fluid flow path and a second sealing surface. A compression arrangement forces the interface member and the fluid conduit together forming a seal around the fluid flow path between the first and second sealing surfaces.

Abstract: A method for joining primary and secondary members includes providing a primary member, a secondary member and a heating element which is joined to one of the primary and secondary members. The heating element includes an electrically insulating matrix material and an electrically conductive reinforcing clement extending through the matrix material. The method further includes bringing the other of the primary and secondary members and the heating element into engagement and controlling a flow of electrical current in the reinforcing element so as to resistively heat and fuse at least some of the matrix material of the heating element with a matrix material of the other of the primary and secondary members. The method may be used to join a primary member such as a composite tubular and a secondary member such as a component for terminating the composite tubular.

Abstract: A method for forming a composite fluid conduit includes providing an inner pipe having a variation in cross-section between at least two different longitudinal sections thereof and applying a fiber reinforced composite material to the inner pipe. In some disclosed examples the variation in cross section may be provided intermediate opposing ends of the inner pipe. In other disclosed examples the variation in cross section may be provided at an end region of the inner pipe.

Abstract: A fluid conduit comprises a wall defining a fluid flow path and a confinement feature within the wall and being configured to confine energy within a cavity, wherein at least a portion of the fluid flow path extends through the cavity. The confinement feature may be configured to confine electromagnetic energy. The fluid conduit may comprise an oscillator defined by the cavity and a positive feedback arrangement. The fluid conduit may be configured for sensing a property of a fluid present in or flowing through the fluid conduit or for use in sensing a property of a fluid present in or flowing through the fluid conduit.

Abstract: A pipe comprises a pipe wall formed of a composite material of a matrix and a plurality of reinforcing fibres embedded within the matrix, wherein the composite material in at least one region of the pipe wall is pre-stressed. The composite material in at least one region of the pipe wall comprises or defines at least one of a level of pre-tension and pre-compression.

Abstract: A riser system (202) comprises a riser (204) to be secured between a floating body (206) and a subsea location (209). The riser comprises a composite material formed of at least a matrix and one or more reinforcing elements embedded within the matrix. In use, the riser (204) comprises an upper portion (214) extending from the floating body (206) and having a region arranged to be in tension, a lower portion (216) extending from the subsea location (209) and having a region arranged to be in tension, and an intermediate portion (218) located between the upper and lower portions (214, 216) and having a region arranged to be in compression. A flow-line jumper (302, 402) configured to be secured between two subsea locations, a flow-line jumper arrangement comprising a flow-line jumper (302, 402) and a method of forming a flow-line jumper 302, 402 are also disclosed.

Abstract: A fluid conduit (2) comprises a wall (4) defining a fluid flow path (6) and a confinement feature (24) within the wall (4) and being configured to confine energy within a cavity (26), wherein at least a portion of the fluid flow path (6) extends through the cavity (26). The confinement feature (24) may be configured to confine electromagnetic energy. The fluid conduit (2) may comprise an oscillator defined by the cavity (26) and a positive feedback arrangement (34). The fluid conduit (2) may be configured for sensing a property of a fluid present in or flowing through the fluid conduit (2) or for use in sensing a property of a fluid present in or flowing through the fluid conduit (2). More specifically, the present invention deals with a microwave cavity sensor wherein the cavity member (24) is embedded in the wall (4) of the fluid conduit (2), the wall (4) including a composite region (20).

Abstract: A riser system configured to be secured between a surface vessel and a subsea location comprises a primary conduit and an auxiliary conduit extending adjacent the primary conduit, wherein the primary and auxiliary conduits are connected together at an axial location along the riser system via a connecting portion. The auxiliary conduit comprises a composite material formed of at least a matrix and one or more reinforcing elements embedded within the matrix.

Abstract: A pipe comprises a pipe wall formed of a composite material of a matrix and a plurality of reinforcing fibers embedded within the matrix. At least one longitudinal portion of the pipe wall comprises or defines a local variation in construction to provide a variation in a property of the pipe.

Abstract: A pipe comprises a pipe wall formed of a composite material of at a matrix and a plurality of reinforcing fibers embedded within the matrix, wherein at least one circumferential segment of the pipe wall comprises or defines a local variation in construction to provide a local variation in a property of the pipe.

Abstract: A fluid conduit comprises a wall defining a fluid flow path and a confinement feature within the wall and being configured to confine energy within a cavity, wherein at least a portion of the fluid flow path extends through the cavity. The confinement feature may be configured to confine electromagnetic energy. The fluid conduit may comprise an oscillator defined by the cavity and a positive feedback arrangement. The fluid conduit may be configured for sensing a property of a fluid present in or flowing through the fluid conduit or for use in sensing a property of a fluid present in or flowing through the fluid conduit.

Abstract: A riser system configured to be secured between a surface vessel and a subsea location comprises a primary conduit and an auxiliary conduit extending adjacent the primary conduit, wherein the primary and auxiliary conduits are connected together at an axial location along the riser system via a connecting portion. The auxiliary conduit comprises a composite material formed of at least a matrix and one or more reinforcing elements embedded within the matrix.

Abstract: A fluid conduit (2) comprises a wall (4) defining a fluid flow path (6) and a confinement feature (24) within the wall (4) and being configured to confine energy within a cavity (26), wherein at least a portion of the fluid flow path (6) extends through the cavity (26). The confinement feature (24) may be configured to confine electromagnetic energy. The fluid conduit (2) may comprise an oscillator defined by the cavity (26) and a positive feedback arrangement (34). The fluid conduit (2) may be configured for sensing a property of a fluid present in or flowing through the fluid conduit (2) or for use in sensing a property of a fluid present in or flowing through the fluid conduit (2). More specifically, the present invention deals with a microwave cavity sensor wherein the cavity member (24) is embedded in the wall (4) of the fluid conduit (2), the wall (4) including a composite region (20).

Abstract: A riser system (202) comprises a riser (204) to be secured between a floating body (206) and a subsea location (209). The riser comprises a composite material formed of at least a matrix and one or more reinforcing elements embedded within the matrix. In use, the riser (204) comprises an upper portion (214) extending from the floating body (206) and having a region arranged to be in tension, a lower portion (216) extending from the subsea location (209) and having a region arranged to be in tension, and an intermediate portion (218) located between the upper and lower portions (214, 216) and having a region arranged to be in compression. A flow-line jumper (302, 402) configured to be secured between two subsea locations, a flow-line jumper arrangement comprising a flow-line jumper (302, 402) and a method of forming a flow-line jumper 302, 402 are also disclosed.

Abstract: A pipe system comprises a metallic pipe section having a wall comprising a metal material, and a deformation absorber coupled to the first pipe section in end-to-end relation. The deformation absorber comprises a composite pipe section having a wall comprising a composite material formed of at least a matrix and a plurality of reinforcing fibres embedded within the matrix. The composite pipe section is configured to sustain a greater level of strain than the metallic pipe section when the pipe system is subject to deformation by a load event.

Abstract: A pipe connection apparatus or assembly 10 for use in applications in, e.g., the oil and gas industry, comprises an engagement member 20 adapted to engage an end region 41 of a pipe 40 when said pipe 40 is connected to a structure, wherein the engagement member 20 comprises a composite material 60 formed of at least a matrix 61 and one or more reinforcing fibres 62 embedded within the matrix 61, and the construction of the composite material 60 of the engagement member 20 is configured to accommodate the end region 41 of the pipe 40.

Abstract: A vibration detector (1) comprising at least one fiber optic sensor (2) mechanically coupled to a flexible support member (3). The vibration detector (1) is mounted on the outside of the pipeline and a signal from the fiber optic sensor is measured. This signal is indicative of whether the vibration detector is experiencing vibrations due to collisions of contaminant particles with each other and/or with the walls of the pipeline. A method for detecting particulate contaminants in a fluid flowing in a pipeline is also provided.