Appeal No. 2006-3061
Application No. 10/405,405
THE INVENTION
The invention relates to a method of well drilling which allows the
drilling and cementing of the casing in a single trip. See page 2 of appellants’
specification. Claim 1 is representative of the invention and is reproduced
below:
1. A one trip drilling and casing cementing method, comprising:
providing a drilling assembly on a drill string;
supporting casing, defining a casing wall, from the drill string so
that said drilling assembly extends below the lower end of the casing;
lowering the drilling assembly and casing in one trip on said drill
string;
drilling the well while advancing the casing;
delivering cement through at least one first opening in said casing
wall; and
forcing the cement into the annular space between the casing and
the wellbore.
THE REFERENCES
The references relied upon by the examiner are:
Bailey 4,759,413 Jul. 26, 1988
Wardley 6,412,574 Jul. 2, 2002
(Filed May 5, 2000)
2
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