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Poor boy degasser is also called liquid-mud separator, it Is a pressure vessel in a fixed vertical position, inside is a defensive pipe against sprinkler. When contaminated mud is routed into the separator, it flows to the sprinkler, then spread to the defensive guard pipe, during this process, the head of entrained gases “break out”. The released gas then carried by the vent lines to remote location where it can be safely flared. The flow of liquid from the vessel can be regulated by a liquid-level-control valve or a U-tube, ensuring adequate retention time in the separator for the gas to break out. 