RELEASING AND CIRCULATING OVERSHOT
Releasing and circulating overshot is one of the fishing tools which can externally engage the pipe, It can fish drill collar, drill pipe, tubing and other pipes. The tools have installed seal, it can circulate drilling fluids in the higher pump pressure after catching the fish. There is a guide shoe at the bottom of overshot which can centralize the fish. It can also work with jars to catch the stuck fish. If the caught fish cannot be release from sticking, it can release the overshot and trip out the drill string.
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