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A kind of elastic orienting device being applicable to radial bore construction
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Micro-emulsion for water base drilling fluid for blocking micro-cracks in shale stratums
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Drilling fluid leakage determining instrument
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PDC (polycrystalline diamond compact) bit provided with retractable blades
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Deep sea heavy equipment installation method capable of gradually freely releasing buoyancy blocks
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Method for mounting deep sea underwater heavy facility by using buoyancy blocks and hoisting and guiding dual-use cable
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