In the drilling process, the gas carried by the drilling fluid from the well affects the performance of the mud and has safety risks, and also affects the service life of some solid control equipment, so it is necessary to install a vacuum degasser to remove the gas in the mud. In underbalanced drilling, sticking occurs frequently at well depth. Vacuum degasser can solve sticking caused by high drilling fluid density.

The role of vacuum degasser in underbalanced drilling technology:

Vacuum degasser

1. Conclusion The field test proves that the vacuum degasser is suitable for treating drilling fluid gas invasion of various gases in conventional oil drilling and underbalanced special drilling operations, separating free and non-free gases in drilling fluid, and restoring the relative density and viscosity of drilling fluid.

2, used to deal with drilling fluid gas invasion, degassing effect is significant, safe and reliable.

3. The vacuum degasser overcomes the disadvantage that the drilling fluid gas separator can only remove the free gas in the drilling fluid, and the non-free gas, that is, the gas in the drilling fluid system, cannot be removed. It has great field popularization and application value.

Technical requirements of vacuum degasser in underbalanced drilling:

1. During unbalanced drilling, the density of drilling fluid is required to be relatively stable. After gas invasion of drilling fluid occurs, timely treatment of gas invasion drilling fluid is required.

2. The special liquid gas separator for underbalanced drilling can do nothing to deal with the gas invaded micro-bubbles in high-density and high-viscosity drilling fluid, and only through the vacuum degasser. Therefore, it is necessary to use a vacuum degasser to treat the gas invading drilling fluid to maintain the drilling fluid density and achieve normal drilling.

3. It has been proved in the well that the treated drilling fluid is restored to the density before gas invasion, thus ensuring the normal drilling of the well. It can be seen from the test data that the density recovery effect of drilling fluid treated by vacuum degasser is good, and the density recovery rate meets the standard requirements.