Defoamers for oilfields, easy to improve oil recovery efficiency
Petroleum coking is one of the processes of petroleum refining, which is the process of carbonizing and focusing organic substances. Under the conditions of petroleum heating and long reaction time, the residual oil undergoes a deep cracking reaction and is converted into gas, gasoline, diesel oil, heavy distillate oil and petroleum coke. The main uses of petroleum coke are the production of carbon enhancers, graphite, smelting industry, fuel, cement, etc. In the process of petroleum coking, the foam problem often occurs, and the generation of foam will affect the quality of petroleum coke, so it needs enough attention. Faced with these foams, oilfield cementing defoamer can be used to solve them.
The cause of coking foaming will be affected by various factors, and the foaming performance is related to the viscosity, density, carbon residue value, asphaltene and gum content of petroleum coking. The high density and viscosity of coking oil will make it easy to foam; the chemical additives added in the process of petroleum coking contain a large amount of surface active substances, which have foaming characteristics, which will lead to a large amount of foam; coking by high temperature and high pressure The impact of the environment is also one of the reasons for coking foaming.
Foam in coking needs to be eliminated in time, otherwise there will be some adverse effects. Too much foam is produced, and it is easy to carry a large amount of coke powder into the branch tower, causing coking in large oil and gas pipelines, branch towers, etc., causing the feed pump and circulating filter at the bottom of the branch tower to block, affecting the normal production of the device; in addition , the coke powder carried into the branch tower will be entered into the coking gasoline by the branch, which will poison and deactivate the hydrogenation catalyst in the subsequent process, affecting the progress and effect of petroleum coking.
Oilfield cementing defoamer has two functions: foam breaking and foam suppression, mainly to destroy and inhibit the formation of bubble wall film. Oilfield drilling defoamer not only quickly burst the foam, but also prevent the formation of foam for a considerable period of time. In addition, the oil field defoamer can reduce the height of the foam layer, improve the processing capacity, and make the device operate stably and fully, with stable chemical properties.
