Wireline Shock-Depression Bailer (WSDB)

recovery stimulation of production wells and intake capacity increase of injection wells by implosive hydrodynamic effect on perforation zones
bottomhole cleaning from loose and viscous sludge

fluid and gas sampling at specified depth to determine physical and chemical properties and compositional analysis
hydrostatic pressure control along wellbore
tripping small metal objects out from bottomhole, including capsules with radioactive sources
bottomhole and sump cleaning from loose and viscous sludge
cleaning of perforation channels and near-wellbore zone from mechanical particles that reduce flow properties of perforation interval