Dump Bailer
Dump Bailer is a mechanical device used for spotting a cement plug above a permanent bridge plug. It is a vessel that is filled with measured quantity of cement slurry and is run in the well on wireline. As the Dump Bailer touches the permanent bridge plug, it is opened through a mechanical or electrical opening mechanism. As the vessel opens, the cement slurry is dumped on the plug by raising the bailer. Dump Bailer provides a quick and relatively inexpensive means of spotting cement plug. It is used quiet effectively at shallow depths. At deeper intervals, special cement slurry design is required to maintain desired slurry properties considering well temperature and static time for running the bailer in the well to spotting depth.