Oilfield drilling fluid foaming cause analysis, foam more how to do?

Sep 19, 2024
Oilfield drilling fluid has an important role in the process of oilfield extraction, can clean the bottom of the well, keep the bottom of the well clean, lubricate the drill bit drilling tools to reduce wear and tear, etc. It is a circulating fluid used in the drilling process, which is a mixture of liquids, solids, and chemical treatment agents. Solid-phase substances in drilling fluid mainly refer to slurry clay, aggravating substances, drill cuttings and other substances, in the process of oilfield drilling fluid often appear a lot of foam, too much foam will bring about some adverse effects, so it is necessary to use oilfield drilling fluid defoamer to solve the foam problem.

Oilfield drilling fluid is divided into three categories according to the dispersing medium: water-based drilling fluid, oil-based drilling fluid and gas-based drilling fluid. Oil and gas formations have certain requirements for drilling fluids, which need to be matched with the rocks of the formation, and the components of the drilling fluids do not have precipitation reactions with the formation fluids to prevent scaling and other damages, and they do not have emulsification reactions with the formation fluids, and the surface tension of the drilling fluids should not be too high. In order to prevent damage to the oil and gas formation caused by solid particle plugging, the solid phase content should be reduced as much as possible.


There are many reasons for oilfield drilling fluid foaming, in the drilling process, the gas in the formation will invade the drilling fluid, and these gases will not be able to escape in time, leading to foaming of the drilling fluid; oilfield drilling fluid contains many surface-active substances, which have foaming characteristics, leading to foam generation; the decomposition of the treatment additives added in the process of drilling will produce gas, which will generate gas bubbles, and due to the mixing operation of the equipment, which results in a large amount of air being The air will be swept into the oilfield drilling fluid, which will lead to foam generation.


Excessive foam will affect the progress of oilfield drilling and normal processes, resulting in reduced drilling efficiency, cost increases, affecting the drilling process; a large number of foam is not eliminated in a timely manner will be gathered in the drilling field inside the drilling site, resulting in the drilling site environment is affected, as well as the waste of drilling fluids; the drilling fluid bubbles will cause blowout phenomenon, affecting the efficiency of the mud pump and reduce the pump pressure, which affects the entire drilling and engineering.
In order to reduce the harm brought by excessive foam, we choose to use oilfield drilling fluid defoamer to solve the foam problem. The defoamer has the characteristics of fast defoaming speed and long foam suppression time, which can quickly eliminate a large number of foams in the oilfield drilling fluid and play the purpose of defoaming and foam suppression; it is resistant to high temperature, acid and alkali, and can stably play the function of defoaming and foam suppression under the environments of high temperature, strong acid and alkali; it has a wide range of applicability and stable chemical properties, and it will not affect the performance and effect of the oilfield drilling after its use.


Click on the related products links:RK-400S(Silicone Defoaming Emulsion

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