Hydraulic and earth engineering – Marine structure or fabrication thereof – Structure protection
Patent
1978-06-28
1980-02-19
Taylor, Dennis L.
Hydraulic and earth engineering
Marine structure or fabrication thereof
Structure protection
405195, 405226, E02D 560
Patent
active
041892550
ABSTRACT:
An implantable sea-floor shoring cellar is provided for housing drilling equipment such as a blowout preventer stack at least partly below the sea floor in order to allow oil well drilling by drill ships in shallow water areas where the distance between the sea floor and the drill ship is not sufficient to allow for normal positioning of the blowout preventer stack above the sea floor. The implantable sea-floor shoring cellar includes a substantially cylindrical retainer wall assembly with an annular air ejector assembly including ejector nozzles mounted within the retainer wall assembly adjacent to a lower opening; and a plurality of discharge tubes are mounted over the ejector nozzles for removing earth loosened from the sea floor during cutting of an opening below the retainer wall assembly so that the retainer wall assembly may be lowered without interference into place at least partly below the sea floor.
REFERENCES:
patent: 428021 (1890-05-01), Rothwell
patent: 1905643 (1933-04-01), Johnson
patent: 3344612 (1967-10-01), Rininger
patent: 3926003 (1975-12-01), Norman
patent: 3965687 (1976-06-01), Shaw
Macan John J.
Magill James M.
Atwood Oceanics, Inc.
Taylor Dennis L.
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