Boring or penetrating the earth – Processes – Boring curved or redirected bores
Reexamination Certificate
2005-08-02
2005-08-02
Bagnell, David (Department: 3672)
Boring or penetrating the earth
Processes
Boring curved or redirected bores
C166S050000, C166S117600, C166S242500, C166S313000
Reexamination Certificate
active
06923274
ABSTRACT:
An apparatus for drilling one or more holes at an angle to a wellbore. The apparatus includes a tubular housing defining one or more openings. Each opening is configured to provide an exit through which a drilling assembly drills to form a hole at an angle to the wellbore. The apparatus further includes one or more deflectors. Each deflector defines a surface for guiding the drilling assembly through an opening, and each deflector is positioned inside the tubular housing such that the surface is facing the opening. The apparatus further includes an anchor having a bottom portion attached to a top portion of the tubular housing and having a top portion configured to be removably fixed to a conveyance tubular.
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U.K. Search Report, Application No. GB 0330240.3, dated Mar. 17, 2004.
Delgado Steve R.
Durst Doug
Glaser Mark C.
Johnson Mike
Rodgers Ken Dale
Bagnell David
Gay Jennifer H
Moser, Patterson & Sheridan L.L.P.
Weatherford / Lamb, Inc.
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