Method and Principle of Prevention-of-Deviation-Drlling by Side-weighted Core Barrel

Method and Principle of Prevention-of-Deviation-Drlling by Side-weighted Core Barrel[J]. COAL GEOLOGY & EXPLORATION, 1984, 12(6): 65-68.

Citation:

Method and Principle of Prevention-of-Deviation-Drlling by Side-weighted Core Barrel[J]. COAL GEOLOGY & EXPLORATION, 1984, 12(6): 65-68.

Citation:

Method and Principle of Prevention-of-Deviation-Drlling by Side-weighted Core Barrel[J]. COAL GEOLOGY & EXPLORATION, 1984, 12(6): 65-68.

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