Method for drilling deviated wells into an offshore substrate

Details Method for drilling deviated wells into an offshore substrate Method for drilling deviated wells into an offshore substrate

1980-04-25

1982-04-27

Leppink, James A.

Boring or penetrating the earth

Boring a submerged formation

Boring from nonbuoyant support

405195, E21B 712, E21B 704

Patent

active

043265952

ABSTRACT:
Method for drilling well bores into an offshore substrate from a marine platform which is fixed to the ocean floor. The latter is provided with a cage which is removably positioned in a platform leg. A drill conductor carried in the cage guides a lowering drill string into a desired direction away from the platform. The cage is periodically raised and rotated, or provided with a different conductor orientation to permit a variation in the drilling direction.

REFERENCES:
patent: 1900163 (1933-03-01), Dana et al.
patent: 2503516 (1950-04-01), Shrewsbury
patent: 4030310 (1977-06-01), Schirtzinger
patent: 4068729 (1978-01-01), Peevey
patent: 4136996 (1979-01-01), Burns

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