The releasing overshot engages, packs off, and retrieves tubular fish, and is especially suited to retrieve parted drillpipe and drill collars. The overshot features a large bore for use with wireline tools and is available in a range of strength categories for jarring and backoff operations.
The tool’s unique tapered helix internal construction provides 360° wall contact
while distributing loads evenly on the tool and fish. Spiral grapples or basket grapples are available. Spiral grapples are used when maximum catch size of the overshot is necessary, and expandable cylinder basket grapples are used when fish ODs are less than one-half inch of the tool’s maximum catch size.