Boring or penetrating the earth – Boring a submerged formation – Boring with underwater tool drive prime mover
Reexamination Certificate
2006-06-06
2006-06-06
Beach, Thomas A (Department: 3671)
Boring or penetrating the earth
Boring a submerged formation
Boring with underwater tool drive prime mover
C175S005000, C166S358000
Reexamination Certificate
active
07055623
ABSTRACT:
Improved method for the drilling of the initial phase of deep water oil wells with an underwater well head consisting in the positioning and cementation of the conductor pipe and anchorage casing by means of a single drilling phase. A tapered hole (with a double diameter) is drilled using a drill string consisting of a motor driven pilot bit and a reaming bit.
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Brusco Guido
Calderoni Angelo
Molaschi Claudio Maria
Beach Thomas A
ENI S.p.A.
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