MUD GAS SEPARATOR

Mud Gas Separator is commonly called a gas-buster or poor boy degasser. It captures and separates large volume of free gas within the drilling fluid. If there is a "KICK" situation, this vessel separates the mud and the gas by allowing it to flow over baffle plates. The gas then is forced to flow through a line and vent it to a flare. A "KICK" situation happens when the annular hydrostatic pressure in a drilling well temporarily (and usually relatively suddenly) falls below that of the formation, or pore, pressure in a permeable section downhole, and before control of the situation is lost.
It is always safe to design the mud/gas separator that will handle the maximum possible gas flow that can occur.

The principle of mud/gas separation for different types of vessels is the same.
• Closed bottom type
• Open bottom type
• Float type

The closed-bottom separator, as the name implies, is closed at the vessel bottom with the mud return line directed back to the mud tanks. Commonly called the poor boy, the open-bottom mud gas separator is typically mounted on a mud tank or trip tank with the bottom of the separator body submerged in the mud. Fluid level (mud leg) is maintained in a float-type mud gas separator by a float/valve configuration. The float opens and closes a valve on the mud return line to maintain the mud-leg level. According to pedestal or base type there are
• Fixed type
• Elevating type
Poor boy degasser in China is usually named according to vessel diameter.
Brightway have the below models for mud gas separator.
• ZYQ800
• ZYQ1000
• ZYQ1200