Method and control system for directional drilling

Details Method and control system for directional drilling Method and control system for directional drilling

2006-12-26

2006-12-26

Dang, Hoang (Department: 3672)

Boring or penetrating the earth

Processes

Boring curved or redirected bores

C175S040000, C175S073000

Reexamination Certificate

active

07152696

ABSTRACT:
A method and control system for directional drilling are described. A drill string motor is commanded to rotate at a constant speed in a forward direction and the constant speed in a reverse direction for a first duration and a second duration, respectively, for at least one oscillation cycle. The difference between an averaged absolute angle of the drill string and a target rotation angle for the drill string is maintained near zero by adjusting the length of the durations as necessary. The target rotation angle can be changed based on measurement while drilling data obtained during drilling operations. Advantageously, friction between the drill string and bore hole is reduced, leading to an increase in the drilling penetration rate.

REFERENCES:
patent: 5465799 (1995-11-01), Ho
patent: 6050348 (2000-04-01), Richardson et al.
patent: 6719069 (2004-04-01), Alft et al.
patent: 6802378 (2004-10-01), Haci et al.
patent: 6918453 (2005-07-01), Haci et al.
patent: 2002/0104685 (2002-08-01), Pinckard et al.
patent: 2004/0118612 (2004-06-01), Haci et al.

Affiliated with

Also associated with

Rating

Method and control system for directional drilling does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and control system for directional drilling, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and control system for directional drilling will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3709991