Overshot Definition
A fishing tool that is attached to tubing or drill pipe and lowered over the outside wall of pipe or sucker rods lost or stuck in the wellbore. a friction device in the overshot, usually either a basket or as spiral grapple, firmly grips the pipe, allowing the fish to be pulled from the hole.
Related Oil & Gas Terms
Free-point indicator
A device run on wireline into the wellbore and inside the fishing string and fish to locate the area where a fish is stuck. when the drill string is pulled and turned, the electromagnetic fields of free pipe and stuck pipe differ. the free-point indicator is able to distinguish these differences, which are registered on...
Grapple
A mechanism that is fitted into an overshot to grasp and retrieve fish from the borehole. the interior of a grapple is wickered to engage the fish....
Spiral grapple
A helically shaped gripping mechanism that is fitted into an overshot to retrieve fish from the borehole. see grapple....
Basket grapple
An expandable, cylindrically shaped gripping mechanism that is fitted into an overshot to retrieve fish from the borehole. see grapple....
Wall hook
A device used in fishing for drill pipe. if the upper end of the lost pipe is leaning against the side of the wellbore, the wall hook centers it in the hole so that it may be recovered with an overshot, which is run on the fishing string and attached to the wall hook....
If you found this page useful, please consider bookmark it using social media or add a link to this page.
