G - Physics – 01 – C
Patent
G - Physics
01
C
G01C 7/06 (2006.01) E21B 47/003 (2012.01) E21B 47/0228 (2012.01) E21B 47/085 (2012.01) E21B 47/02 (2006.01)
Patent
CA 2089105
17 Abstract of the Disclosure: A borehole laser cavity monitoring system comprises a probe adapted to be lowered by means of a cable extending into a borehole leading to an underground cavity and having a fixed portion attached at one end to the cable and a rotary head located at the other end. The probe contains a navigation module for providing a signal representing the orientation of the probe with respect to a reference position, a laser rangefinder mounted in the rotary head for generating data signals representing distance measurements permitting to obtain the shape and volume of the cavity, a micro-processor for controlling the operation of the rotary head and for collecting the data generated by the navigation module and the rangefinder, and a communication interface for transmitting the output signals collected by the micro- processor over the cable and for receiving control signals transmitted from the upper edge of the borehole over the cable for controlling the operation of the micro- processor. A control unit is located at the upper edge of the borehole and includes a host computer which generates such control signals and a second communication interface for linking the host computer to the probe. A depth counter is located at the upper edge of the borehole and connected to the host computer.
Chevrette Guy
Gorris Fried
Hilchey John
Hipp Johann
Jacob Denis
Inco Limited
Nadeau Francois
Noranda Inc.
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