Determining a borehole azimuth from tool face measurements

Details Determining a borehole azimuth from tool face measurements Determining a borehole azimuth from tool face measurements

E - Fixed Constructions

21

B

E21B 47/022 (2006.01) E21B 47/024 (2006.01)

Patent

CA 2509562

A method for surveying a subterranean borehole is provided. The method includes determining tool face angles at first and second longitudinal positions in the borehole. The method further includes processing the tool face angles to determine a change in borehole azimuth between the first and second positions. Exemplary embodiments of this invention provide a direct mathematical solution for the change in azimuth and therefore provide for improved accuracy and reliability of azimuth determination (as compared to the prior art) over nearly the entire range of possible borehole inclination, azimuth, tool face, and dogleg values.

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