LT-T Type Releasing and Circulating Overshot is one of the most common external fishing tool for engage, pack off and retrieve tubular fish, especially for fishing drill collars and drillpipes.
There is a high pressure mud fluid circulating when overshot caught the drill collar or drill pipe with spiral grapple and mill control.
Basket grapple and mill shoe are used when catch the tubing, the mill shoe can be used to mill the fish top and sharp edge to make the fish run into the overshot.
The LT-T Type Releasing and Circulating Overshot has the advantage of simple structure, easily operation and high success fishing rate.
