Borehole survey instrument

Patent · Tue Dec 04 04:00:00 EST 1984

OSTI ID:5865107

Sharp, H E; Lin, III, J W; Macha, E S; Smither, M A

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.

• Assignee: Wilson Industries Inc.
• Patent Number(s): US 4485563
• OSTI ID: 5865107
• Country of Publication: United States
• Language: English

Related Subjects

440400* -- Well Logging Instrumentation
47 OTHER INSTRUMENTATION
DIRECTIONAL DRILLING
DRILLING
EQUIPMENT
FLOTATION
IMAGE PROCESSING
INCLINATION
INJECTION WELLS
LENSES
LIGHT BULBS
LIGHT SOURCES
ORIENTATION
PHOTOGRAPHY
PROCESSING
RADIATION SOURCES
SEPARATION PROCESSES
WELL LOGGING EQUIPMENT
WELLS