As an important device of oil & gas drilling fluids solids control system, vacuum degasser separates the gases that migrates into the drilling fluids by the function of vacuum pump and vacuum tubular tank. If the gases does not been separated from the drilling fluids, it may cause well kicked, and increase the total financial cost and timing cost of the drilling project. If there is no gas migrating into the drilling fluids, the vacuum degasser would work as a big mud agitator, to enhance the shearing rate of the drilling mud.
KOSUN Vacuum Degasser
How is a vacuum degasser designed?
Vacuum degasser is vacuum type. It applies the vacuum pump suction to form a negative pressure region in vacuum cylinder. The drilling fluid is forced to flow into the hollow shaft of the rotator through suction pipe under the atmosphere pressure. After that, the fluid sprays to cylinder walls out of hollow shaft windows.At this time,the drilliing fluid is separated to a thin layer under the collapse together with separating impeller and gas bubbles in the mud may break and are displaced to a safe place under the vaccum pump with gas-liquid separator through airdisplace pipelines of the separator while the mud is drained out by impeller. In addition, drilling mud enters the pump cylinder only through suction pipe and can’t be sucked in through discharge pipe because the main motor is started at the first place and the impeller connected to the motor will revolve at a high speed.
Vacuum degasser ranks as the second stage of solids control equipment. The drilling mud that are separated by the first stage device — shale shaker flows into the setting compartment of the mud tank. The drilled cuttings would settle into the setting pit, and the drilling fluids would flow over and into the second compartment. A sand pump would be used to pump the drilling mud from the second compartment up to the vacuum degasser, The drilling mud enters into the vacuum tank through the feeding pipe, and rotates by the rotor of the degasser, by the effect of centrifugal force, the drilling fluids would be threw to the inner wall of the vacuum tank, and the gases that migrate into the mud would be separated from the mud. Vacuum layer would be generated by the vacuum pump that are mounted on the skid of degasser, so the gases that are separated would be pumped out to the water-gas separator by the vacuum pump and be discharged through the relief linepipe and finally be flared by the electrical ignition device at a place that are 60 to 80 meters away from the drilling rig.
