Boring or penetrating the earth – Boring a submerged formation – Boring from nonbuoyant support
Patent
1980-07-10
1982-07-13
Leppink, James A.
Boring or penetrating the earth
Boring a submerged formation
Boring from nonbuoyant support
175 61, 175 75, E21B 708
Patent
active
043390056
ABSTRACT:
A method and apparatus for installing a curved well conductor (22) from an offshore marine structure (10) utilizes a leading section of precurved pipe (26) along with a plurality of trailing sections of initially straight pipe (24). The precurved pipe (26) is releasably straightened as the conductor (22) is lowered from the marine structure (10). Upon engagement with the sea floor, the precurved pipe (26) is released to resume its original curvature. The trailing initially straight sections of pipe (24) are then forced to follow a curved path defined by the leading section as the well conductor (22) is driven into the sea floor.
REFERENCES:
patent: Re28860 (1976-06-01), Marshall et al.
patent: Re29929 (1979-03-01), Horuath
patent: 2336334 (1943-12-01), Zublin
patent: 2344277 (1944-03-01), Zublin
patent: 2382933 (1945-08-01), Zublin
patent: 3451493 (1969-06-01), Storm
patent: 3687204 (1972-08-01), Marshall et al.
patent: 4249619 (1981-02-01), Burns
Atlantic Richfield Company
Leppink James A.
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