Method and apparatus for controlled directional drilling of...

Details Method and apparatus for controlled directional drilling of... Method and apparatus for controlled directional drilling of...

E - Fixed Constructions

21

B

73/86

E21B 7/04 (2006.01) E21B 47/00 (2006.01) E21B 47/022 (2006.01)

Patent

CA 1311372

ABSTRACT OF THE DISCLOSURE In the representative embodiments of the present invention described herein, new and improved methods and apparatus are disclosed for measuring various forces acting on an intermediate body between the lower end of a drill string (11) and the earth-boring apparatus (14) coupled thereto whereby the magnitudes and angular directions of bending moments and side forces acting on the earth-boring apparatus (14) can be readily determined so that predictions can be made of the future course of excavation of the apparatus.

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