Directional drilling of a drill string

Details Directional drilling of a drill string Directional drilling of a drill string

E - Fixed Constructions

21

B

255/6

E21B 7/08 (2006.01) E21B 7/06 (2006.01) E21B 17/10 (2006.01)

Patent

CA 1265782

ABSTRACT "IMPROVEMENTS IN DIRECTIONAL DRILLING OF A DRILL STRING" A method of controlling the direction of a drill bit (3) at the downhole end of a drill string (2) drilling from a surface comprises providing two steer- able stabilisers (4,5) at the downhole end of the drill string (2) at locations spaced apart in the drilling direction, and adjusting the orientation of the stabilisers to create reactive forces from the bore hole (6) to deflect the course of the bit (3) in a desired direction. The stabilisers (4,5) are suitably arranged eccentrically and circumfertially offset by 180° ? 60°. In normal drilling the drill string (2) is rotated such that the stabilisers (4,5) engage the bore hole (6) to support a downhole motor (1) against tilting When off course drilling is sensed the stabilisers are rotated to a position and stopped from rotation such that drilling forces generate reaction forces to cause a desired change of direction.

524251

Affiliated with

Also associated with

Rating

Directional drilling of a drill string does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Directional drilling of a drill string, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Directional drilling of a drill string will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1270509