Geometrical instruments – Indicator of direction of force traversing natural media – Borehole direction or inclination
Patent
1982-12-03
1984-12-04
Stearns, Richard R.
Geometrical instruments
Indicator of direction of force traversing natural media
Borehole direction or inclination
33313, 175 45, E21B 47022, G01D 942
Patent
active
044855630
ABSTRACT:
A borehole survey instrument is provided having a meniscus type floating compass member with indicia thereon for indicating azimuth and inclination. A light source is disposed below the indicia for illuminating the indicia upward through the liquid through which the meniscus type floating compass member floats. A lens system is provided for focusing the image of the illuminated compass member upon a film disposed below the compass member. This arrangement permits the centering post for the compass member to be of minimum diameter consistent with rigidity requirements and permits a high angle compass member to indicate angles of inclination approaching ninety degrees. A multiple light bulb light source is utilized and each light bulb is mounted in a manner which permits a single light bulb to illuminate the entire compass member. A hand-held programming and diagnostic unit is provided which may be momentarily electrically mated with the borehole survey tool to input a programmed timed delay and diagnostically test both the condition of the light bulbs utilized as the illumination source and the state of the batteries within the instrument. This hand-held programmable unit eliminates all the mechanical programming switches and permits the instrument to be completely sealed from the pressure, fluids and contaminants normally found in a well bore.
REFERENCES:
patent: 2120670 (1938-06-01), Hyer
patent: 2195224 (1940-03-01), Opocensky
patent: 2644242 (1953-07-01), Hewitt, Jr.
patent: 2756511 (1956-07-01), Young
patent: 3100350 (1963-08-01), Brown
patent: 4153120 (1979-05-01), Zuvela et al.
patent: 4171578 (1979-10-01), Meador
patent: 4393598 (1983-07-01), Powell et al.
Linn, III John W.
Macha Emil S.
Sharp Harper E.
Smither Miles A.
Stearns Richard R.
Wilson Industries, Inc.
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