In order to separate the gas effectively in the drilling, so an efficient degasser is essential to the safe and productive drilling operations. Since gas is practically insoluble in water, it is relatively easy to detect and remove. By comparison, gas is easily soluble in oilbase muds – its detection is more difficult as well as its removal. Regardless of the composition of the gas encountered, gas existing in the mud can decrease efficiencies in rig pumps, centrifugal pumps and associated operational solids control equipment. The goal is to “Keep the pumps Operating”.
Vacuum Degasser
What is the features of vacuum degasser among solids control equipments?
1. Self contained unit without need for centrifugal pump to feed drilling mud.
2. Eliminates corrosion and reduces maintenance costs.
3. Short footprint can be installed in smaller spaces.
4. Degasser can act as a big agitator for the drilling mud, which enhances the performance of desander and desilter.
Vacuum degasser ranks as the second stage of oil drilling mud solids control system. 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.
