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Debris removal and gauge ring device and method
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Method and device for measuring gamma radiation
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Chemical cutting method and apparatus
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Method and apparatus for exploration of geological formations in boreholes
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Method and apparatus for reducing groeningen effect errors in resistivity measurements of an earth formation
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Cable elongation measurement apparatus
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Staged chemical pipe cutter
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Through tubing bridge plug
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Apparatus including a magnetometer having a pair of U-shaped cores for extended lateral range electrical conductivity logging
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Radioactivity well logging
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Early gas detection system for a drill stem test
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