The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 06, 2006
Filed:
Nov. 12, 2001
Applicants:
Angelo Calderoni, San Donato Milanese-Milan, IT;
Claudio Maria Molaschi, Crema-Cremona, IT;
Guido Brusco, San Donato Milanese-Milan, IT;
Inventors:
Angelo Calderoni, San Donato Milanese-Milan, IT;
Claudio Maria Molaschi, Crema-Cremona, IT;
Guido Brusco, San Donato Milanese-Milan, IT;
Assignee:
ENI S.p.A., Rome, IT;
Primary Examiner:
Int. Cl.
CPC ...
E21B 7/12 (2006.01); E21B 29/12 (2006.01);
U.S. Cl.
CPC ...
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.