SUBSEA PIPE CROSSING installed when the pipelines are installed.

Subsea Pipe Crossing

Subsea Pipe Crossings match any pipe size, bare and coated. A common central Pivot Pin provides a common interface between all sizes, bare or coated. Additionally the Pivot Pin allows the unit to swivel to match the angle of the pipelines. Thus the operator can mix and match the two halves of the Pipe Crossing to match any pipeline combination. A size is set to handle coating thickness up to 2% of the diameter of the pipe. Thus for thicker coatings, use the next larger size adjusted to fit by thicker rollers

PIPE CROSS LANDING

SUBSEA PIPE CROSSING

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PIPE CROSS LANDED

SUBSEA PIPE CROSSING PROVIDES PERMANENT SEPARATION FOR SUBSEA PIPELINES

LOCKS ONTO 2 CROSSING PIPELINES

PROVIDES ROLLERS FOR FREE MOVEMENT OF PIPELINES

INSULATES BETWEEN PIPELINES

PROVIDES DESIGNATED SHEARING FORCE

ELIMINATES REPETITIVE SANDBAGGING

CAN MIX AND MATCH SIZES (I.E. 10” X 6”)

SUBSEA PIPE CROSSING LANDING SEQUENCE – NEW PIPELINE
The upper left graphic shows the Pipe Crossing as it is landing with a new pipeline.  Welders position the buckle arrestor collar to land near the lower pipeline.  Then the operator clips it to the pipeline at the surface near a buckle arrestor collar.  The regular ROV moves the Pipe Cross up into alignment with the lower pipeline.  Then it lands and locks in place.
This sequence requires no extra vessels or ROVs.

LANDING SEQUENCE – EXISTING PIPELINE
When replacing a conventional crossing, it requires extra steps.  First, lifting the upper pipeline.  Then lowering and landing the Pipe Cross on the upper pipeline.  The flipping the Pipe Cross and aligning with the lower pipeline.  Finally lowering the upper pipeline and Pipe Crossing onto the lower pipeline.
SEAFLOOR MOVEMENT
When the seabed moves, it moves the pipelines with it. Thus  pipelines move off conventional pipe crossings.  The Beta Subsea Pipe Crossing engages both pipelines with rollers.  So it  moves with the pipelines as the pipelines move.

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