Geometrical instruments – Indicator of direction of force traversing natural media – Borehole direction or inclination
Patent
1976-03-23
1978-02-07
Stephan, Steven L.
Geometrical instruments
Indicator of direction of force traversing natural media
Borehole direction or inclination
33313, 33318, G01C 906, G01C 1900
Patent
active
040719596
ABSTRACT:
An instrument for measuring the direction of a borehole in order to carry out a spatial survey thereof comprises a gyro-stabilized 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.
REFERENCES:
patent: 3771118 (1973-11-01), Lichte et al.
patent: 3808697 (1974-05-01), Hall
Pitman; George R., Inertial Guidance, Wiley, 1962, pp. 53-55.
Russell Anthony W.
Russell Michael K.
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