Boring or penetrating the earth – Boring a submerged formation
Patent
1991-05-03
1993-02-09
Neuder, William P.
Boring or penetrating the earth
Boring a submerged formation
166367, 166358, 166359, E21B 712, E21B 1909, E21B 43013
Patent
active
051846861
ABSTRACT:
A method for drilling offshore wells in deep water with greater safety and with fewer casing strings, maintaining a maximum diameter wellbore in the early stages of drilling to facilitate casing operations in and beyond deviated sections, and providing full well control while setting surface casing. This method utilizes a two-riser system for drilling in which the surface casing interval is run and set within a large diameter, light duty riser. Thereafter, drilling proceeds with a heavy duty riser.
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Neuder William P.
Shell Offshore Inc.
Smith Mark A.
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