Anticorrosive paint used for inner wall of oil pipe and oil pipe having inner wall sprayed with anticorrosive paint

Abstract

The invention discloses an anticorrosive paint used for an inner wall of an oil pipe and the oil pipe having the inner wall sprayed with the anticorrosive paint. The anticorrosive paint comprises a component A and a component B, wherein the component A comprises modified phenolic resin, a mixed solvent, auxiliary agents and auxiliary materials; the mixed solvent comprises xylene and butanone; the auxiliary agents comprise a de-foaming agent, an anti-sagging agent and a film forming auxiliary agent; the auxiliary materials comprise heavy calcium carbonate, kaolin and titanium dioxide; the component B comprises an accelerant and a solvent; the accelerant is a mixture of CYD-128 epoxy resin and bisphenol A, and the solvent is butanone; the mass ratio of the component A to the component B is (3-7) to (0.5-2). The anticorrosive paint has unique advantages of high temperature resistance, strong permeation resistance and the like, can be used for a long period under weak acid and weak alkali environments, and expresses the unique superiority in special mine wells containing hydrogen sulfide and having high concentration of carbon dioxide; anti-corrosion and scale formation capabilities of the mine wells also can be improved, leaked-point-free spraying can be realized through a specific mass ratio and the spraying thickness is uniform.

Description

technical field [0001] The invention relates to an oil pipe with an anti-corrosion coating, in particular to an anti-corrosion paint used for the inner wall of the oil pipe and an oil pipe with the inner wall sprayed with the anti-corrosion paint. Background technique [0002] At present, with the increase of oilfield production time in my country, the quality of injection water is deteriorating, and sulfate redox bacteria are gradually increasing. The serious corrosion and scaling of oilfield downhole pipe strings caused by this have become "persistent problems" that plague injection wells. The survey of my country's Zhongyuan and Shengli Oilfields found that the direct economic losses of pipe strings and pipeline materials caused by corrosion in these two oil fields reached 140 million yuan and 300 million yuan respectively; the replacement of pipe strings and pipelines affected production, resulting in indirect The economic loss amounted to about 1 billion yuan. Corrosion...

AI Technical Summary

Problems solved by technology

Corrosion and scaling symptoms are not eliminated, not only difficult to reduce costs, but also difficult to guarantee the construction of water injection wells

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