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Patent
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G01V 1/28 (2006.01) E21B 47/00 (2006.01) G01S 15/89 (2006.01) H04N 5/30 (2006.01)
Patent
CA 1301304
ABSTRACT OF THE DISCLOSURE Apparatus for creating a video display from information generated by acoustically scanning a reflect- ing boundary circumferential of a borehole. A downhole tool generates a first signal each time a rotating trans- ducer therein passes through magnetic north. Acoustic pulses emitted from the transducer are radially transmit- ted toward a borehole reflecting boundary. At least a portion of each pulse is reflected back to the transducer where the same is detected and converted to an electrical pulse representative of the reflected acoustic pulse. The peak of each electrical pulse is detected and the value digitized. A series of different addresses is associated with each digital value from a single 360° borehole scan and the same are accumulated in a RAM with each digital value being stored therein at its associated address. A central processing unit selects a block of video memory locations in a video memory responsive to the magnetic north signal. The data stored in the RAM is transferred directly to the video memory by applying the RAM addresses, as the data is read out thereof, to the video memory thus transferring the data to the selected block of video memory locations. An address generator is provided for rapidly reading data from the video memory for gener- ating a video display therefrom. GMB:go 88068ART0221
561864
Morris Steven A.
Mount Houston B. II
Amoco Corporation
Gowling Lafleur Henderson Llp
LandOfFree
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