Buoyancy adjustment
AssigneePetroleum Geo-Services AS
InventorsEinar Nielsen, Thomas Clive Snook
Life of this patent
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Abstract
Device for the adjustment of buoyancy of a seismic cable comprising a main part (1) adapted to firm, integrated mounting into a chosen point in the length of the cable, the main part (1) comprising fastening means (3,4) for one or more weight or buoyancy elements (2) and one or more exchangeable weight or buoyancy elements (2) adapted to being mounted into the main part (1).
Claims51
A buoyancy adjustment device for the adjustment of buoyancy in a seismic cable, said device comprising:
- a main part;
- at least one fastening means;
- wherein said fastening means is adapted and arranged for integral mounting of said main part to a cable;
- and
- at least one buoyancy element adapted and arranged for removable mounting to said main part.
A device for the adjustment of buoyancy of a seismic cable, said device comprising:
- a means for mounting a removable buoyancy element to a main part which is integrally fastened to a cable;
- a means for testing the buoyancy of the seismic cable;
- and
- a means for adjusting the buoyancy, dependent upon the means for testing.
The device for the adjustment of buoyancy of a seismic cable in a liquid, said device comprising:
- a means for allowing fluid to pass through said device which is attached to the seismic cable;
- a means for testing the buoyancy of the seismic cable;
- and
- a means for adjusting the buoyancy, dependant upon the means for testing, wherein said means for adjusting adjusts the amount of fluid allowed to pass through said device.
A device for the adjustment of buoyancy of a seismic cable, said device comprising:
- an approximately cylindrical main part further comprising:
- a hollowed section;
- a channel;
- and
- a passage;
- wherein said channel spans at least a portion of said main part;
- wherein said passage spans at least a portion of said main part;
- a fastener located near at least one end of said approximately cylindrical main part;
- and
- a buoyancy element located within said hollowed section;
- wherein the shape of said buoyancy element substantially corresponds to the shape of said hollowed section.
The device of claimed 44 wherein said cover comprises an approximately cylindrical enclosure.
Dependencies are inferred from the claim text.