Self-controlled directional drilling systems and methods

Details Self-controlled directional drilling systems and methods Self-controlled directional drilling systems and methods

2004-01-15

2008-08-19

Bomar, Shane (Department: 3676)

Boring or penetrating the earth

Processes

Boring curved or redirected bores

C175S026000, C175S045000, C175S076000, C166S255200

Reexamination Certificate

active

07413032

ABSTRACT:
System and method of controlling a trajectory of a wellbore comprises conveying a drilling assembly in the wellbore by a rotatable tubular member. The drilling assembly includes a drill bit at an end thereof that is rotatable by a drilling motor carried by the drilling assembly. The drilling assembly has a first adjustable stabilizer and an second stabilizer spaced apart from the first adjustable stabilizer. The first adjustable stabilizer having set of ribs spaced around the stabilizer, with each rib being independently radially extendable. The position of a first center of the first adjustable stabilizer is adjusted in the wellbore relative to a second center of the second stabilizer in the wellbore for controlling the trajectory of the wellbore.

REFERENCES:
patent: 5168941 (1992-12-01), Krueger et al.
patent: 5220963 (1993-06-01), Patton
patent: 5332048 (1994-07-01), Underwood et al.
patent: 5341886 (1994-08-01), Patton
patent: 5603386 (1997-02-01), Webster
patent: 6092610 (2000-07-01), Kosmala et al.
patent: 6213226 (2001-04-01), Eppink et al.
patent: WO 98/17894 (1998-04-01), None
Patton, “Automatic Directional Drilling Shows Promise”, Petroleum Engineer International, 64, Apr. 1992, pp. 44-48.

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