Method of directional drilling with steerable drilling motor

Details Method of directional drilling with steerable drilling motor Method of directional drilling with steerable drilling motor

2006-09-20

2010-10-12

Bagnell, David J (Department: 3672)

Boring or penetrating the earth

Processes

Boring curved or redirected bores

C175S092000, C175S170000, C175S027000

Reexamination Certificate

active

07810584

ABSTRACT:
Drilling a bore hole comprises rotary drilling at a first rotation rate until a first target value is substantially met, changing the first rotation rate to a second rotation rate when a trigger is substantially met, and then drilling at the second rotation rate until a second target value is substantially met. Preferably, the second rotation rate is substantially zero, so the drilling at the second rotation rate is slide drilling. Finally, the steps of rotary drilling at a first rotation rate, changing the rotation rate to a second rotation rate, and drilling at the second rotation rate are repeated.

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