RADIUS CONTROL

摘要

A method and apparatus for providing an outer collar member of an end fitting for a flexible pipe. The apparatus comprises an outer collar body portion and an outer collar neck portion extending away from the outer collar body portion. The neck portion is arranged to be secured to a portion of flexible pipe body in a slotted position between layers of the flexible pipe body. The position is located between an outer sheath of the flexible pipe body and at least one armour layer of the flexible pipe body wherein the outer collar body portion comprises a curved inner surface region for determining a radius of curvature of wires of the armour layer bent away from an axis of the flexible pipe bodies and supported by the curved inner surface when the pipe body is mounted in the end fitting.

主权项

1. Apparatus for securing wires of an armour layer in an end fitting of a flexible pipe, comprising:
an end fitting comprising an inner collar member and an outer collar member; and a flexible pipe body mounted in the end fitting, the flexible pipe body comprising an internal pressure sheath, at least one armour layer and an outer sheath; the inner collar member comprising: an inner collar body portion; and an inner collar neck portion extending away from the inner collar body portion; wherein an end region of said neck portion comprises an outer surface region flared outwardly towards a mouth at an end region of the inner collar member, and located at a selected region where wires of the armour wire layer are bent outwardly against the outer surface region, thereby determining a radius of curvature of the wires bent outwardly away from an axis of the flexible pipe body and supported by the outer surface region; the outer collar member comprising: an outer collar body portion; and an outer collar neck portion extending away from the outer collar body portion, the outer collar neck portion being secured to a portion of the flexible pipe body in a slotted position between layers of the flexible pipe body, said position being located between the outer sheath of the flexible pipe body and the at least one armour layer of the flexible pipe body; wherein said outer collar body portion comprises an inner surface region flared outwardly towards a mouth at an end region of the outer collar member, and located at a selected region where wires of the armour wire layer and bent outwardly against the inner surface region, thereby determining a radius of curvature of wires of the armour layer bent outwardly away from an axis of the flexible pipe body and supported by the inner surface region; wherein each of the inner collar member and outer collar member include wire supporting surfaces comprising said outer surface region and said inner surface region respectively thereby determining a radius of curvature of wires of the armour layer of the flexible pipe body when the wires are bent away from an axis of the flexible pipe body and supported by the wire supporting surfaces when the flexible pipe body is mounted in the end fitting.