Underwater trenching apparatus

Details Underwater trenching apparatus Underwater trenching apparatus

2008-04-30

2009-12-29

Lagman, Frederick L (Department: 3672)

Hydraulic and earth engineering

Subterranean or submarine pipe or cable laying, retrieving,...

Submerging, raising, or manipulating line of pipe or cable...

C405S159000, C037S317000, C037S321000, C037S323000

Reexamination Certificate

active

07637696

ABSTRACT:
An underwater trenching system is mountable on a side of a barge to be propelled by the barge along a waterway, the bed of which contains a trench with a laid pipeline. To remove the excess sediment from the trench the trenching unit delivers pressurized water and air to the trench. A sparge assembly with jet nozzles directs jets of water, breaking up the formation that has built up around the pipeline. The airlift assembly creates a turbulent flow to lift the disturbed sediment and remove it from the created trench.

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