How to use defoamer for oil& gas? Do you know why should use defoamer in oil&gas production?

In the petroleum industry, defoamer is necessary from the extraction and processing of crude oil. During the drilling process, a mud pump is used to hit the mud along the hollow of the drill pipe to the drill bit at the bottom of the drill pipe, and then The space between the drill pipe and the wall of the well is returned to the ground, and the cuttings that are drilled down are carried along with the return. After the cuttings have settled in the mud pool, they must be recycled for clean use.

There are several main ways of foam generation during drilling:

• When natural gas overflows in the formation, foam is generated in the mud, and the surfactant in the mud has the function of stabilizing the foam, so that the foam generated by the mud is too late to burst and circulate to In the well;
• Too much surfactant;
• Foam generated from the gas generated by decomposition or fermentation of the treatment agent at high temperature;
• Air entrained in the actual process due to stirring. At this time, it is necessary to add an oil extraction defoamer to eliminate foam. The process of adding defoamer is as follows: When preparing mud, first add defoamer to the soil particles, stone powder, etc., such as silicone defoamers, Aluminum stearate, fusel alcohols, castor oil, kerosene, pine oil, etc., and then add surfactants such as lignosulfonate to suspend the mud.

When the pressure of the oil-bearing layer is reduced too much,

water injection can be used to drive the oil. The seawater contains 2mg / L of organic matter, and has strong foaming properties. Therefore, seawater must be treated (chlorination, filtration, deaeration, and scale inhibitors). The degassing process uses a vacuum method. If the foam is stable, the gas is wrapped in a large number of bubbles, which is difficult to remove. At the same time, oxygen entering the vacuum tower will also multiply bacteria. Therefore, the oil extraction defoamer must be added before the vacuum tower enters the water. Crude oil is concentrated through the pipelines of each well, and after preliminary processing such as oil and gas separation, demulsification and dehydration, etc., it is then transported out, and many of them need to use defoamers. In oil and gas separation, due to the fast flow rate, if the foam in the crude oil is relatively stable, it is often too late to separate, reducing the capacity of the separator.

Coking is the simplest process in petroleum cracking. Residual oil,

wax-based oil and residual oil are processed through deep processing to improve the yield of light oil. The resulting distillates can be used as fuel oil after refining. A large amount of foam is generated in the coking process to reduce the utilization rate of the equipment and affect the progress of the process.
All the above processes have harmful foams, some are produced by low boiling materials, and some are produced by added additives. The production of foam has a great impact on oil quality, equipment operation efficiency, output, etc. Therefore, it is necessary to add an oil extraction defoamer.
https://www.linkedin.com/company/china-defoamer
https://www.ywlchemical.com/how-to-use-defoamer-for-oil-gas/
https://www.ywlchemical.com/