Oil well cement swelling agent

Abstract

An oil-well cement expander is provided, characterized by consisting of 70% calcium light and 30% azo compounds. The present invention has advantages of making the cement volume expand, effectively improving cementing property between cement columns and sleeves or stratums, improving capability of cement columns supporting sleeves and separating stratums, compensating the liquid column pressure during slurry curing to avoid gas channeling, so the expander is also called the prevention of gas channeling with property in promoting solidification.

Description

Technical field: [0001] The invention relates to an admixture used in oil field cementing operations, in particular to an oil well cement nitrogen expansion agent used in oil field cementing operations. Background technique: [0002] The leakage of oil, gas and water in the annular space of oil and gas wells has always been a prominent problem that has been widely concerned by the petroleum engineering circles at home and abroad. So far, it has not been fundamentally solved, and has caused great economic losses to the petroleum industries of various countries. Therefore, the research on anti-channeling materials and their mechanism of action is still one of the hot spots in the field of petroleum cementing in various countries. Invention content: [0003] The object of the present invention is to overcome the shortcomings in the above-mentioned prior art, and provide an oil well cement expansion agent, the expansion can improve the cementing ability and prevent gas channel...

AI Technical Summary

Problems solved by technology

[0002] The leakage of oil, gas and water in the annular space of oil and gas wells has always been a prominent problem that has been widely concerned by the petroleum engineering circles at home and abroad. It has not been fundamentally solved so far, and has caused great economic losses to the petroleum industries of various countries.