Method and apparatus for handling of covering gas

Details Method and apparatus for handling of covering gas Method and apparatus for handling of covering gas

2006-07-04

2006-07-04

Lee, Kevin (Department: 3753)

Fluid handling

Processes

Involving pressure control

C137S210000, C137S340000

Reexamination Certificate

active

07069942

ABSTRACT:
A method for the handling of covering gas or inert gas in connection with a tank that conveys crude oil, during successive discharging and loading operations of the tank, is disclosed. The method is characterized by the fact that covering gas/inert gas is re-circulated in an approximate closed circulation by the following steps: that during discharging of the tank, covering gas is produced in a recognized manner known per se from the cargo to fill the gradually increasing void space in the tank, and that when the tank is filled again with crude oil, the gas from the tank is extracted again, and it is compressed and absorbed into the stabilized crude oil. An apparatus is mentioned for accomplishing the method.

REFERENCES:
patent: 3197972 (1965-08-01), King
patent: 5165246 (1992-11-01), Cipolla et al.
patent: 5678423 (1997-10-01), Davies et al.
patent: 56-81391 (1981-07-01), None

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