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A workover rig. The term workover is used to refer to any kind of oil well intervention involving invasive techniques, such as wireline, coiled tubing or snubbing.More specifically, a workover refers to the expensive process of pulling and replacing completion or production hardware in order to extend the life of the well.
As of 2012, 2.5 million "frac jobs" had been performed worldwide on oil and gas wells, over one million of those within the U.S. [7] [8] Such treatment is generally necessary to achieve adequate flow rates in shale gas, tight gas, tight oil, and coal seam gas wells. [9] Some hydraulic fractures can form naturally in certain veins or dikes. [10]
Snubbing is a type of heavy well intervention performed on oil and gas wells. It involves running the BHA on a pipe string using a hydraulic workover rig. Unlike wireline or coiled tubing , the pipe is not spooled off a drum but made up and broken up while running in and pulling out, much like conventional drill pipe .
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Well intervention vessel Skandi Constructor. A well intervention, or well work, is any operation carried out on an oil or gas well during, or at the end of, its productive life that alters the state of the well or well geometry, provides well diagnostics, or manages the production of the well.
Pumper: A worker whose job is to monitor and maintain active oil and gas wells. Rat hole: A hole on the drilling rig floor used to store the kelly and swivel. Roughneck: an honor reserved for the top tier members of a drilling crew. Sidetrack: A planned deviation from a previously drilled section of the wellbore.