In oil-field operations, fishing is the technique of removing lost or stuck objects from the wellbore. The term fishing is taken from the early days of cable-tool drilling. At that time, when a wireline would break, a crew member put a hook on a line and attempted to catch the wireline to retrieve, or “fish for,” the tool. Necessity and ingenuity led these oil-field fishers to develop new “bait.” The trial-and-error methods of industry’s early days built the foundation for many of the catch tools used currently. Fishing jobs fall into three categories: open hole, when there is no casing in the area of the fish; cased hole, when the fish is inside casing; or thru-tubing, when it is necessary to fish ...
Get The Guide to Oilwell Fishing Operations, 2nd Edition now with O’Reilly online learning.
O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.