Flow Release Overshot


Flow Release Overshot

The WellEnTech Flow-Release Overshot is a device for locating, engaging and pulling slick tool OD’s and tubulars. The grapple can be functioned either mechanically or hydraulically in order to engage the fish and a strong spring ensures the grapple is fully supported when located on the fish. Flow through the tool and a pull load disengages the tool from the fish.


  • Flow activated
  • Enclosed spring design
  • Multi-function operation
  • Fully adjustable activation pressure
  • Easily redressed
  • Compact and rugged design
  • Interchangeable grapples
  • Standard fishing operations
  • Heavy duty fishing operations
  • Jetting and pick up operations

To mechanically function the tool, an axial downward load (in excess of the spring force) enables the grapple to automatically engage the fish. The spring then pushes the grapple back to the supported position, and an applied axial load causes the grapple to bite into the fish, this over pull will verify engagement with the fish.

To release, fluid flow through a nozzle fitted to the nose of the stem creates an internal pressure which pumps the grapple back to the de-supported position enabling the grapple to be pulled free from the fish. The pressure at which activation occurs is adjusted by simply changing out the nozzle orifice dia.


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