Overshot

摘要

An overshot (10, 100, 200) for handling equipment (12) defining a spearhead point (14). The overshot (10, 100, 200) includes: a substantially elongated overshot body (16); a pair of lifting dogs (18) pivotally mounted to the overshot body (16) so as to be movable between a dog closed configuration and a dog open configuration; and a dog control element (26) operatively coupled to the lifting dogs (18) for selectively controlling the movement of the lifting dogs (18) between the dog closed and open configurations, the dog control element (26) being operable between an armed configuration, a locked configuration and a released configuration. In the armed configuration, the lifting dogs (18) are movable between the dog closed and open configurations for allowing insertion of the spearhead point (14) therebetween; in the locked configuration, the lifting dogs (18) are locked in the dog closed configuration; and in the released configuration, the lifting dogs (18) are positioned in the dog open configuration.

主权项

1. An overshot for handling equipment defining a spearhead point, said overshot comprising:
a substantially elongated overshot body defining a body proximal end and a substantially longitudinally opposed body distal end; a pair of lifting dogs, said lifting dogs being substantially elongated and extending along said overshot body, said lifting dogs defining each a dog proximal section, a dog distal section substantially opposed thereto and a dog intermediate section extending therebetween, said lifting dogs being pivotally mounted to said overshot body in said dog intermediate section so as to be movable between a dog closed configuration and a dog open configuration, said dog distal sections being configured and sized for allowing latching of said spearhead point therebetween when said lifting dogs are in said dog closed configuration, said dog distal sections being spread apart from each other to a greater extent in said dog open configuration than in said dog closed configuration for allowing substantially free movements of said spearhead point therebetween; and a dog control element operatively coupled to said lifting dogs for selectively controlling the movement of said lifting dogs between said dog closed and open configurations, said dog control element being operable between an armed configuration, a locked configuration and a released configuration, wherein
in said armed configuration, said lifting dogs are movable between said dog closed and open configurations for allowing insertion of said spearhead point therebetween;in said locked configuration, said lifting dogs are locked in said dog closed configuration; andin said released configuration, said lifting dogs are positioned in said dog open configuration.