Wireline Fishing Guide In Oil And Gas Wells
In open hole well logging operations, well conditions are frequently such that the logging tools become stuck (pipe sticking guide), bridged over, or the line becomes keyseated (Drilling Keyseat) in the wall of the hole. When this happens, the wireline operator will feel anxious, and sometimes he may pull too much which will lead to parting the line and further wireline fishing operations.

Rather than parting the line, it will be a good practice is to perform a “cut and thread operation".
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