Defoaming agent for petroleum wells

Abstract

The invention discloses a petroleum defoaming agent for petroleum wells. The petroleum defoaming agent is prepared from the following raw materials in parts by weight: 7-10 parts of silicone grease, 1-2 parts of propolis, 3-6 parts of lauryl sodium sulfate, 1-55 parts of modified activated carbon, 1-2 parts of chlorinated paraffin, 8-15 parts of hydrophobic silicon dioxide, 1-3 parts of potassiumiodide, 36 parts of pine oil and 3-5 parts of diesel oil; wherein active carbon is treated, so that the dispersity of the active carbon can be remarkably improved, and the defoaming agent is endowed with better defoaming performance. When the obtained petroleum well defoaming agent is used, petroleum defoaming work can be rapidly completed with a small amount, various use requirements are met, theapplication range is wide, ingredients are environmentally friendly, and harm to the human body is small.

Description

technical field [0001] The invention relates to the field of organic polymer compounds, in particular to a defoamer for petroleum oil wells. Background technique [0002] In order to extract oil, the holes drilled according to the well layout system of the oilfield development plan are the channels through which the oil rises from the bottom of the well to the head of the well. Oil wells are perforations drilled by drilling methods. Generally, after the oil well is drilled into the oil layer, the oil layer casing is lowered, and oil well cement is injected into the annular space between the casing and the well wall to maintain the well wall and seal the oil, gas, and water layers. The hole gun shoots through the oil layer to form a channel, which is lowered into the oil pipe, and the oil is raised from the bottom of the oil well to the head of the well by a suitable induction method. [0003] The defoamers approved for use in my country include emulsified silicone oil, hig...

AI Technical Summary

Problems solved by technology

Polyether-type defoamer is a polyether prepared by ring-opening polymerization of ethylene oxide and propylene oxide. It is a water-soluble nonionic surfactant with excellent performance. Good stability, but its foam breaking rate is low, and it cannot quickly break a large amount of foam; silicone-type defoamers are mostly emulsified products of silicone oil, which has the advantages of simple production process and high defoaming efficiency, but its emulsification is more complicated , the stability of the emulsion is not high. In addition, the high silicon content in it will lead to catalyst poisoning in the subsequent processing. The other is polyether-modified polysiloxane. The preparation process of the former is relatively simple, but the stability of the emulsion is poor. The latter has the advantages of good stability, strong defoaming effect, and non-toxicity, but the preparation is The process is relatively complicated, and precious metal catalysts are used, and the cost is high; non-silicon defoamers refer to defoamers based on mineral oil, fatty amides, phosphoric acid esters, and fatty acid esters. These defoamers are cheap and currently It is still widely used in the market, but its stability is poor and it is not suitable for use in high temperature environments

[0005] At present, defoamers on the market generally have problems such as slow defoaming and unsatisfactory defoaming effect.

In the process of oil production, defoamers need to be used. The current defoamers cannot meet the needs of use, and the use effect is very poor.