Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,... – Submerging – raising – or manipulating line of pipe or cable...
Patent
1994-05-24
1996-11-12
Taylor, Dennis L.
Hydraulic and earth engineering
Subterranean or submarine pipe or cable laying, retrieving,...
Submerging, raising, or manipulating line of pipe or cable...
4051681, 4051684, F16L 118
Patent
active
055733530
ABSTRACT:
A vertical reel pipelaying vessel having a vertical pipe storage reel rotatably positioned aft of midship and a vertical aligner wheel positioned forward of the reel. A guide means includes supports for the aligner wheel on the vessel to permit rotational movement about the axle of the aligner wheel. A moon pool is positioned forward of the reel. A direction means is provided for pivoting the aligner wheel over the moon pool to allow pipe takeoff forward of the axis of the aligner wheel and into the moon pool. The aligner wheel is provided with strain gauges along the axle to measure directly the tension of the pipeline being unspooled and passing into the water through the moon pool. A pipe straightener to apply independent transverse forces to the pipe remote from the aligner includes an endless track with rollers and sprockets in order to apply a first force at the pipeline and aligner wheel contact and a second force to the pipeline after the pipe takeoff from the aligner to bend the deformed pipeline to become straight. A transverse shifting assembly shifts the vertical aligner wheel, the supporting structure for the aligner wheel as well as the direction means for pivoting the aligner wheel. The transverse shifting assembly operates athwartship. A pipeline A&R clamp with engagement latch, shells and slips is provided to hold the pipeline after it leaves the aligner wheel and before it enters the water.
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Edwards R. J.
J. Ray McDermott S.A.
Keegan Francis A.
LaHaye D. Neil
Taylor Dennis L.
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