When using oil well cement defoamer, the following points need to be noted:
1.Oil well cement defoamer is specially developed for the characteristics of the oilfield industry to solve the problem of defoaming in oil extraction. It is mainly composed of organic hydroxyl compounds, silica, special synergists and dispersants, which has obvious effects on removing stubborn and fine foam in operations, and has good defoaming, foam inhibition and degassing effects.
2.In the process of adding defoamer, the general dosage (volume ratio) is 0 according to the on-site water quality and the foaming situation of the admixture05-0.2%。It can be mixed with other admixtures at the same time or directly added to the medicine tank for a little circulation, or it can be added in the box of the slurry car, which can achieve good defoaming and foam suppression effects.
3.When using oil well cement defoamer, it needs to be combined with specific operating procedures. For example, foaming can be encountered during the preparation phase, wellbore preparation, mixing the grout, measuring and calculating, injecting the slurry, waiting for curing and completing the job, which is where the use of defoamers is required. Defoamer
4.It should be noted that oil well cement is specially used for cementing engineering of oil wells and gas wells, and its main function is to cement and seal the casing with the surrounding rock formation, seal the oil, gas and water layers in the formation to prevent cross-interference, so as to form a well-isolated oil flow channel from the oil layer to the surface in the well. Therefore, when using defoamers, it is also necessary to consider their impact on cementing engineering.