Methods and apparatus for recording well logging measurements

Communications: electrical – Selective – Having electron beam device

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Details

315378, 346 33WL, 346110R, G01V 140

Patent

active

040204510

ABSTRACT:
According to one embodiment, distinctive indicia having a "three-dimensional" appearance and representative of well logging data is produced by a CRT (Cathode-ray tube) recorder by modulating both the intensity and position of the sweeping electron beam in response to variations in the data. In another embodiment, distinctive indicia in the form of a vector or arrow representative of the data is produced by sweeping the CRT electron beam in such a way that it defines an increasing spiral pattern. The electron beam is then turned on for a short pulse at the same angular position of each cycle of the spiral. For purposes of synchronization, in each of the above embodiments the beam sweep is initiated by a recurring event, such as a pulse indicative of a given incremental change in the depth level from which the data was derived. In still another embodiment, one of the above techniques is combined with presently available techniques to produce a combination log having the distinctive indicia recorded on one portion of the CRT screen and regular traces recorded on another portion of the same screen. Yet in another embodiment, alternating sweeps of the CRT electron beam are switched between two recording areas or strips on the CRT screen. A different recording medium is located adjacent each of the two recording strips thereby allowing the generation of two separate recordings. The data recorded on each medium may be completely different, or the data may be the same but recorded with different scale factors.

REFERENCES:
patent: 2677785 (1954-05-01), Owen
patent: 2881356 (1959-04-01), Van Alstyne
patent: 3050990 (1962-08-01), Renaut

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