Patent ID: 8783745

Claim:
A device with an overshot device comprising: an elongated body adapted to be connected to a hoisting line in one end and with a tubular opening receiving a spearhead in the other end, said elongated body comprising a locking dog support structure; at least one lifting dog comprising first and second lifting lugs each arranged to pivot around a lifting dog pivot pin, said lifting lugs being configurable between a spearhead latched configuration and a spearhead unlatched configuration, each lifting lug comprising a spearhead capture member and a spearhead release member, the spearhead capture member being adapted to capture the spearhead; a lifting dog biasing element configured to connect the lifting lugs and urge the lifting lugs towards the spearhead latched configuration; at least one locking dog comprising first and second locking lugs each arranged to pivot around a locking dog pivot pin, said locking lugs being configurable between a lifting dog locked configuration and a lifting dog unlocked configuration, each locking lug comprising a lifting dog locking member, the lifting dog locking member being adapted to lock the lifting dogs in the spearhead latched configuration; a locking lug biasing element configured to connect the locking lugs and urge the locking lugs towards the lifting lug locked configuration; and an engagement member capable of movement with respect to the elongated body, the at least one lifting dog and the at least one locking dog; wherein movement of the locking lugs is arranged to force the at least one locking dog into the lifting dog unlocked configuration in which the lifting dog locking members releasably interlock with the locking dog support structure.