Geometrical instruments – Indicator of direction of force traversing natural media – Borehole direction or inclination
Patent
1996-08-22
1998-05-19
Fulton, Christopher W.
Geometrical instruments
Indicator of direction of force traversing natural media
Borehole direction or inclination
33308, 33391, 33399, E21B 47022
Patent
active
057523207
ABSTRACT:
A dip angle indicator for use in boreholes, and having, an elongated casing, having a diameter to fit down a desired borehole, a sensing chamber, located along the central axis of the casing and defining first and second ends, a linear variable displacement transducer, located along the central axis, and having an operating rod with a free end positioned in the sensing chamber, the rod free end defining a generally conical point, a swing arm located within the sensing chamber, along the central axis, and having a free end defining a generally conical recess, the conical recess receiving the conical point of the transducer rod, movable mounting means mounting the swing arm at one end of the sensing chamber, remote from the transducer, the swing arm extending through the moveable mounting means outside of the chamber, and, weight means mounted on the free end of the swing arm outside the chamber, the weight means being free to move within the casing, whereby to tilt the swing arm within the chamber, and thereby apply axial force to the transducer rod.
REFERENCES:
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patent: 4587871 (1986-05-01), Kathel
patent: 5634280 (1997-06-01), Hellier et al.
Otte Hubert Josef
Paulson John Emanuel
Roosman Lennart
Borehole Survey Systems Inc.
Fulton Christopher W.
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