HYDRAULIC OVERSHOT TOOL WITHOUT A NOZZLE, AND METHOD OF RETRIEVING A CYLINDER

摘要

The present invention provides an improved hydraulic overshot tool. The overshot tool mechanically engages a cylindrical body downhole attempting to be retrieved. In the event retrieval is unsuccessful, the overshot tool may be hydraulically released from the cylindrical body. The release function emplo ys a pressure differential within the overshot tool, but without necessity of a nozzle within the bore of the tool.