Bending Restrictor Sleeve - BRS
BRS are included in the pipeline assembly when
the reeling installation method is used. The design of a pipeline installed
by reeling includes considerations for ovality resulting from bending. Hence
a BRS only controls the strain level consistent with the bending radius.
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Collars transfer tension forces by closing of slots A.
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Collars transfer compression forces by closing of adjoining gaps C.
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Collar B includes an inflatable packer or friction
connection for conveyance to the seabed.
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Annulus between collars and the pipeline accommodates passage of
insulation and anodes.
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Component shown in green represents the pipeline and red of high strength
material.
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All components corrosion coated with thermal spray aluminum (TSA).
Design Considerations
The BRS is designed for the moment
experienced when providing the support and limitation of strain for the pipeline
when crossing an obstruction.
Installation
- Determining the location of BRPJ in
the pipeline using a long baseline acoustic array is identical to terminating pipelines.
- BRS is suspended at the pipe departure location with the pipeline fed
through when unreeling.
- Inflatable packer or spring-loaded friction connection engaged at the
required location for conveyance to the seabed.
- Series of assemblies can be interconnected and spaced to fit the profile
to be crossed.
