Subsea mooring

Details Subsea mooring Subsea mooring

1997-02-21

1999-06-29

Swinehart, Ed L.

Ships

Anchor

B63B 2124

Patent

active

059153261

ABSTRACT:
A suction anchor for mooring systems, especially from floating installations for offshore production of oil and gas. The anchor is made in the form of a hollow cylindrical body (2) that is open at both ends and is completely embedded in the seabed (1), i.e. it is surrounded by seabed mass on all sides. Such a deep siting of the anchor (2) results in several advantages. For instance, the anchor (2) will penetrate to a depth with presumably firmer masses. The danger of a split on the back of the anchor is also avoided. The anchor can be left behind after use, because it lies at an approved depth. The anchor is mounted by means of a top piece designed as an inverted beaker-shaped part provided with a vent hole so that the anchor can be suction penetrated. The top piece is recovered and used again for lowering other similar anchors. Advantageous embodiments/sitings of the anchor cable (5,7) connected to the anchor are also described.

REFERENCES:
patent: 2556279 (1951-06-01), Johnson
patent: 3180304 (1965-04-01), Brady
patent: 3496900 (1970-02-01), Mott et al.
patent: 3516379 (1970-06-01), Skoog
patent: 4036161 (1977-07-01), Nixon
patent: 4710061 (1987-12-01), Blair et al.
patent: 4733993 (1988-03-01), Andreasson

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