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UMBILICAL WITH FATIGUE RESISTANT FIBRES

  • US 20140202574A1
  • Filed: 06/13/2012
  • Published: 07/24/2014
  • Est. Priority Date: 06/13/2011
  • Status: Abandoned Application
First Claim
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1. An umbilical casing for an umbilical for use in underwater drilling operations, the umbilical casing comprising:

  • an inner thermoplastic polymer layer;

    an outer thermoplastic polymer layer; and

    at least two fibre reinforcement layers between the inner and outer thermoplastic layers;

    wherein the fibre reinforcement layers are contra helical with each comprising at least one group of fibre yarns laid helically along the outside of the inner thermoplastic layer; and

    wherein each group of fibre yarns comprises a plurality of fibre yarns laid to run in side by side fashion along the outside of the inner thermoplastic layer.

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