| 摘要 |
In a method of eliminating or reducing the escape of oil from a damaged oil tank (1) of an oil tanker which has gone aground, there is first created an underpressure in the gas space of the damaged tank. While maintaining this underpressure there is then applied a liquid lock. This lock is created by means of a trunk (10), which may be portable and which is accommodated in a pressure vessel (9). Subsequent to evacuating the pressure vessel via a working hatch (8) the trunk is then lowered into the gas space of the tank. The trunk is lowered beneath the surface of the oil, whereafter the pressure vessel is removed, the liquid column in the tank forming a lock for the underpressure in the tank. There is then lowered into the tank a portable submersible pump - or a hose (17) which is caused to operate as an air-lift pump by feeding finely divided air to the bottom thereof. Above deck the air is passed to a deaerator (18), while the oil is passed to an empty or partially filled undamaged tank (2; 2') through a hose (7; 19). |
