Borehole stabilization while drilling

Boring or penetrating the earth – Processes

Reexamination Certificate

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Details

C175S325200

Reexamination Certificate

active

07013992

ABSTRACT:
A method for drilling in unconsolidated formation is taught. In particular, a method for borehole stabilization in an unconsolidated formation includes providing a drill string; rotating the drill string to drive a drill bit to drill a borehole having a borehole wall; driving the drill string against the borehole wall while rotating the drill string to plaster the surface of the borehole wall.

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patent: 2003/0079913 (2003-05-01), Eppink et al.
patent: 0 816 628 (1998-07-01), None
patent: WO 99/25949 (1999-05-01), None

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