问答题 翻译：The sampling device is designed to take samples from two or three different levels in the tank so that a composite sample can be collected that will be the representative of the whole tank.

问答题 翻译：In the conventional method the depth of oil received in the tank is measured and the measurement is converted to barrels.

问答题 翻译：Esaturated oil at and above the point in the flow string where its bubble point pressure is reached.