E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
33/92
E21B 47/022 (2006.01)
Patent
CA 1074103
ABSTRACT OF THE DISCLOSURE An instrument for measuring the direction of a borehole in order to carry out a spatial survey thereof comprises a gyro-stabilised single-axis platform having its axis coincident with the axis of the borehole and three gravity sensors for measuring three components of gravity in the direction of the borehole axis and in two mutually perpendicular directions in a plane perpendicular to said axis. - 1 -
293025
Russell Anthony W.
Russell Michael K.
Na
Russell Attitude Systems Limited
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