What’s a centrifugal degasser?

What’s a centrifugal degasser?

A drilling mud centrifugal degasser for use in degassing gas-cut drilling mud. In the case of oil field drilling mud, the mud often comes in contact with gases in the well which become dissolved due to the high operating pressures involved. If the gases are allowed to remain in the used mud, upon recycling there is accelerated infusion of gas leading to blowout conditions. Normally drilling mud centrifugal degasser is installed after shale shaker as 2nd purification equipment to process drilling fluids while drilling, and widely used in the various solids control system.

Centrifugal Degasser Working Principle

Via the rotating impeller, the degasser sucks the drilling fluid into the vessel. The fluids will stay at a level higher than the gas cut drilling fluid and then a cylindrical liquid layer with inverted cone shape space in the middle will be formed. Drilling fluid is discharged from discharge port along a tangent line. With the impeller rotating, bubble breaks, gas will be extracted from liquid, and finally accumulate in the cone shape space as the lower density. Pressurizing unit(similar to exhaust fan) will suck air through the narrow channel between the air distribution disk and air separation ring into the discharge cone, and then gas manifold, braided hose and pressurized device to pressuring unit, finally discharge the gas out through pressuring device with pressure.

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Centrifugal Degasser