Refer to oil and gas drilling history we found there are so many equipment to get rid of mixed gas in drilling mud. Presently, we call popular ones as vacuum degasser and poor boy degasser. Let’s find more interesting information on gas separation
Gas busters are a simple cylinder or baffle box at the flowline where mixed drilling fluid and gas are roughly separated while flowing. The drilling fluid goes to the shale shaker, and the gas is allowed to flow away or is sent to a flare line.
Separators are holding tanks where mixed water, oil, and gas are allowed to separate by gravity. They have evolved in the last 50 years from simple open tanks to complex closed and pressurized tanks Separators can be informally divided into two groups: (1) atmospheric or unpressurized, and (2) pressurized, or closed.
Degassers are somewhat different devices from the preceding two. The degasser is a tank in which a vacuum and/or spray removes entrained gas from the mud system. Degassers handle much smaller gas volumes than do gas busters or separators but do a more complete job of removing the gas.
The distinction between gas busters, separators, and degassers is not precise. There are unpressurized (atmospheric) degassers, and there are separators that use centrifugal force or an involute spiral to help bring gas out
