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FR1530433A
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equipment for recording exploration information from a borehole
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FR1416453A
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Acoustic logging installation
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US3334329A
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Method and apparatus for producing a plurality of curves for comparison in acoustic well logging
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FR1387080A
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Device for auxiliary services of a well
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FR1358477A
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Single-conductor acoustic survey recording system
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US3256479A
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Automatic programmed circuitry and instrumentation for well logging and servicing
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FR1306305A
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Method and apparatus for delayed recording of measurements
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FR1283788A
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Projection shaped charge perforator
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FR1271792A
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Method and apparatus for exploration of boreholes with an inclinograph
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FR1259600A
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Drill cannon for drilling
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FR1255163A
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exploration equipment for drilling
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FR1253526A
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Method and apparatus for exploration of boreholes and land by measuring radioactivity
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FR1253505A
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Electric drilling exploration
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FR1253506A
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Device for sampling and analysis of drilling fluids
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CA691842A
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Telemetering and remote control devices and systems
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CA626338A
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Neutronic well logging calibrating system and method therefor
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CA740554A
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Single conductor acoustic well logging system
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CA791275A
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Contact-type borehole logging apparatus
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CA632476A
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Firing system for jet type perforating gun
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CA727287A
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Acoustic velocity bore hole logging systems and apparatus
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