Plug-Backs
Plug-back is used before abandoning a well or before sidetracking is done.
Plug-back is the process of placing a cement plug at one or more locations in a well to shut off flow from below the plug. Cement plugs are placed in the borehole to prevent migration of fluids between the different formations. This also prevents the migration of gas or fluids to the surface.
There are two methods for placing a cement plug in a well:
- plug-back using tubing
- plug-back using a dump bailer
Potential Hazard
- being struck by pressured lines when pumping cement
Possible Solution
- Instruct personnel to stand clear of pressurized lines.
Knowledge Check Choose the best answer for the question.
7-5. During the abandoned well plugging process, when is it possible to be struck by pressurized lines?
You forgot to answer the question!