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Lifting Dog Tired? Pointy Issue Resolved with New Overshot

Boart Longyear’s New Overshot Resolving Pointy Issues Since Boart Longyear introduced the Q™ Wireline system in 1966, retrieving the inner tube from the core barrel has been handled the same way: an overshot with lifting dogs (spring loaded hooked “fingers”) is lowered or pumped into the hole until it snaps over a pivoting spearhead mechanism… MORE »

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