An apparatus for securing to an outer surface of a segment of flexible pipe body, comprising an outer clamp portion around a region of flexible pipe body and comprising a plurality of outer body members each having an inner surface; and an inner clamp portion in an abutting relationship between the outer clamp portion and said flexible pipe body, comprising a plurality of inner body members each having an outer surface that comprises a mating region that has a shape that mates with a shape of a corresponding mating region of the inner surface of the outer clamp portion. Each mating region comprises at least one clamping surface region that in an imaginary plane that extends through and includes a primary axis of the pipe body, arranged oblique to the primary axis when the inner clamp portion is between the outer clamp portion and the pipe body.

An apparatus for securing to an outer surface of a segment of flexible pipe body, comprising an outer clamp portion around a region of flexible pipe body and comprising a plurality of outer body members each having an inner surface; and an inner clamp portion in an abutting relationship between the outer clamp portion and said flexible pipe body, comprising a plurality of inner body members each having an outer surface that comprises a mating region that has a shape that mates with a shape of a corresponding mating region of the inner surface of the outer clamp portion. Each mating region comprises at least one clamping surface region that in an imaginary plane that extends through and includes a primary axis of the pipe body, arranged oblique to the primary axis when the inner clamp portion is between the outer clamp portion and the pipe body.

Methods for real-time coiled tubing fatigue monitoring can establish a remaining operational life of a coiled tubing strand. Standard or low-cycle plastic fatigue in bending is measured each time the coiled tubing strand is deployed through a guide arch. Also, smaller, but higher frequency loads, e.g., high cycle loads imparted to the coiled tubing strand due to interaction with an oceanic environment, are also measured. A plurality of weight detectors may be coupled to a support frame below the guide for monitoring the high-cycle loads. The remaining operational life of the coiled tubing strand may be calculated based on both the plastic strains using a low-cycle fatigue analysis and the elastic strains using a high-cycle fatigue analysis. An operator may retire a coiled tubing strand prior to failure based on the calculated remaining operational life.

A method for laying a pipeline on the bed of a body of water comprises assembling a pipeline on a laying vessel; launching the pipeline from the laying vessel; identifying a zone of the bed of the body of water that causes stresses greater than a threshold value determined for the pipeline; progressively laying the pipeline on the bed of the body of water by advancing the laying vessel; and making, through controlled plastic deformation, at least one curved section along the pipeline with a curvature concordant with the curvature assumed by the pipeline in proximity to said zone, when the pipeline is at least partly laid on the bed of the body of water and partly suspended with respect to the bed of the body of water in proximity to said zone.

A system and method for detecting passage of a pipeline pig, the system and method including a passive impulse detector [10] having a housing [13]; a non-intrusive connection [15] of the housing to an exterior wall [17] of a pipeline [P], at least one vibration sensor [11] housed by the housing; and signal processing [23] including at least one band pass filter [27] configured to receive data collected by the vibration sensor, the vibration sensor and band pass filter configured to monitor frequencies in a predetermined range indicating the impulse. The selected frequencies should be those more easily detectable above the baseline (signature or natural resonance) frequency of the section of pipeline being monitored. In some embodiments, the selected frequencies are lower frequencies. No portion of the passive pipeline pig signal intrudes into an interior of the pipeline.

A system and method for detecting passage of a pipeline pig, the system and method including a passive impulse detector [10] having a housing [13]; a non-intrusive connection [15] of the housing to an exterior wall [17] of a pipeline [P], at least one vibration sensor [11] housed by the housing; and signal processing [23] including at least one band pass filter [27] configured to receive data collected by the vibration sensor, the vibration sensor and band pass filter configured to monitor frequencies in a predetermined range indicating the impulse. The selected frequencies should be those more easily detectable above the baseline (signature or natural resonance) frequency of the section of pipeline being monitored. In some embodiments, the selected frequencies are lower frequencies. No portion of the passive pipeline pig signal intrudes into an interior of the pipeline.

Deployment of coiled tubing may be assisted using an apparatus comprising a source of coiled tubing, a coiled tubing distributor that comprises a passageway adapted to allow engaging the coiled tubing from the source of coiled tubing where the passageway comprises a coiled tubing receiver comprising a predetermined radius and a support frame, connected to the passageway, that is adapted to accept a portion of the coiled tubing therethrough, and a slip disposed intermediate the passageway and the support frame where the slip is adapted to accept a portion of the coiled tubing therethrough. The apparatus may be mounted to a structure and a portion of the coiled tubing deployed from the source of coiled tubing about the coiled tubing receiver through the slip. The apparatus is allowed to compensate for motion of the structure while the portion of the coiled tubing is deployed about the coiled tubing receiver through the slip.

A method of fixing a clamp around a pipe comprises supporting the pipe between curved clamp parts, namely a cradle and shells, that are assembled in mutual opposition about the pipe while fabricating the clamp. By placing the pipe into the cradle and then bringing the shells into contact with the pipe, those opposed clamp parts are simultaneously in contact with the pipe. Initially, a gap is maintained at an interface between the clamp parts. A full penetration weld is then formed in the gap. As the weld cools and shrinks, the clamp parts are drawn together, to a mutual spacing narrower than the original gap, to compress the pipe between them. The clamp is suitable for attaching the pipe to a structure such as the frame of a subsea pipeline accessory, for example a valve in fluid communication with the pipe.

A method of fixing a clamp around a pipe comprises supporting the pipe between curved clamp parts, namely a cradle and shells, that are assembled in mutual opposition about the pipe while fabricating the clamp. By placing the pipe into the cradle and then bringing the shells into contact with the pipe, those opposed clamp parts are simultaneously in contact with the pipe. Initially, a gap is maintained at an interface between the clamp parts. A full penetration weld is then formed in the gap. As the weld cools and shrinks, the clamp parts are drawn together, to a mutual spacing narrower than the original gap, to compress the pipe between them. The clamp is suitable for attaching the pipe to a structure such as the frame of a subsea pipeline accessory, for example a valve in fluid communication with the pipe.

A method and apparatus for selective connection of a first fluid communication region to a further fluid communication region at a subsea location and a flexible pipe are disclosed. The apparatus comprises a valve body that includes a primary passageway extending from a first port of the valve body, and connectable to a first fluid communication region, to a further port of the valve body, connectable to a further fluid communication region, the valve body comprising a channel intersecting the primary passageway and extending between an open channel end and a closed channel end; at least one slidable member comprising a slidable body locatable in the channel and comprising a slidable member fluid passage extending through or around the slidable body; and at least one biasing element locatable proximate to at least one of the open channel end or closed channel end, for biasing the slidable body towards the open channel end; wherein the slidable member is slidable along a longitudinal axis of the channel responsive to a local environmental pressure provided at the open channel end.