Submudline drivepipe whipstock method and apparatus

Details Submudline drivepipe whipstock method and apparatus Submudline drivepipe whipstock method and apparatus

1987-07-13

1988-03-29

Leppink, James A.

Boring or penetrating the earth

Boring a submerged formation

Boring from nonbuoyant support

166277, 175 61, 175 80, 175 82, E21B 7136, E21B 706, E21B 720

Patent

active

047337320

ABSTRACT:
In order to salvage a slot path on an offshore platform wherein the original conductor pipe has become clogged or otherwise rendered unusable, the original conductor is cut off below mudline, thereby leaving a stub forming a base upon which a suitably oriented deflector trough is attached. A new or replacement conductor is installed along the same slot path until the deflector trough causes the new conductor to follow a deviated path so as to avoid the original conductor. The direction of the deflector trough is selected to avoid existing wells already driven from such structure.

REFERENCES:
patent: Re29929 (1979-03-01), Horvath
patent: 2145422 (1939-01-01), Kinzbach
patent: 3095039 (1963-06-01), Kinzbach
patent: 4068729 (1978-01-01), Peevey

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