Hydraulic and earth engineering – Marine structure or fabrication thereof – Structure protection
Patent
1982-08-19
1984-12-11
Husar, Cornelius J.
Hydraulic and earth engineering
Marine structure or fabrication thereof
Structure protection
405217, 285 3, 166368, 166377, E02D 3100, E02D 3114, E21B 3303, F16L 3700
Patent
active
044875274
ABSTRACT:
A subsea wellhead assembly for areas subject to iceberg scouring including an upper conductor in a well bore and a lower conductor in the well bore with the upper end of the lower conductor being within the lower end of the upper conductor and connected thereto by a weak connection and the upper end of the lower conductor being below the maximum iceberg scour depth and means for connecting said conductors, said connecting means having sufficient strength to withstand bending loads during drilling and being removable for installation of production equipment. Additionally production equipment in the well bore includes a block valve supported within the second conductor and a production string extending upward from the block valve and having a weak point within the upper end of the second conductor whereby the well control is not lost by deep iceberg scouring since the production control equipment is within the second conductor which is not damaged by the scouring and the production equipment extending thereabove fails without damage to the lower control equipment or loss of the well.
REFERENCES:
patent: 2562298 (1951-07-01), Creighton
patent: 2800185 (1957-07-01), Teplitz
patent: 3155175 (1964-11-01), Johnson
patent: 3662822 (1972-05-01), Wakefield
patent: 3971576 (1976-07-01), Herd
patent: 4080797 (1978-03-01), Thompson
patent: 4183404 (1980-01-01), James et al.
patent: 4289205 (1981-09-01), Mott
patent: 4290483 (1981-09-01), Lawson
Cameron Iron Works, Inc.
Husar Cornelius J.
Stodola Nancy J.
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