A kind of anti-scaling and anti-corrosion oilfield pipe material, used coating and preparation method of coating

Abstract

The invention discloses antiscaling and anticorrosion paint for an oil field pipe and a preparing method thereof. The paint is prepared from, by weight, 100 parts of thermosetting epoxy resin, 10-40 parts of plasticizer, 20-40 parts of ceramic powder, 0.1-0.4 part of glass fiber, 0.2-0.6 part of linear amino polysiloxane segmented copolymer, 0.2-0.6 part of polyacrylate, 0.1-0.5 part of 2,5-ditert-butylhydroquinone, and 40-80 parts of solvent. A coating formed by the paint is free of pinholes and has good antiscaling and anticorrosion effects, excellent abrasive resistance, high high-temperature resistance and high impact strength.

Description

technical field [0001] The invention relates to an oilfield pipe material, a used paint and a preparation method of the paint, in particular to an anti-scaling and anticorrosion oilfield pipe material, a used paint and a preparation method of the paint. Background technique [0002] Oil and water pipes are one of the main oil production tools in oilfields. In the oilfield production process, in order to improve oil recovery, new technologies of water flooding and three-component flooding are adopted. Due to the salinity of water quality, the physical and chemical properties of dissolved salts and the Influenced by roughness and other factors, the problem of scaling and corrosion on the pipe wall has become increasingly prominent. According to laboratory analysis, the scaling on the pipe wall is mostly hard material layers such as carbonates, sulfates, and silicates. Such scaled oil and water pipes can remove scale layers Very difficult. However, with the increase of oilfiel...

AI Technical Summary

Problems solved by technology

[0004] 1. Scale will still be deposited on the coating. As time goes by, serious scaling will still appear on the pipe wall, which will cause the internal and external pipe walls to break off, blockage, pipe wall perforation, leakage, etc. downhole due to the shedding of scale. ACCIDENT;

[0005] 2. The paint has poor leveling during processing, application and curing, and the surface of the prepared coating has defects such as pinholes and fish eyes. These surface defects of the coating are easy to scale, and the corrosive medium can pass through the capillary Holes or fish eyes carry out corrosion reaction on the interface between the coating and the metal, so that the local coating is preferentially peeled off. As the coating is used in aqueous solution for a long time, especially under high temperature conditions, this form of damage to the coating more and more prominent;

[0006] 3. Due to the insufficient wear resistance and hardness of the coating, the surface of the coating is easy to wear. In severe cases, the coating falls off and leaks out of the pipe, resulting in severe corrosion at the worn part

[0007] Due to the application of compound flooding in oilfields, more and more scale-forming ions are injected into water and produced fluids, and the operation period of oil-water wells due to scaling is getting shorter and shorter. Dirt requirements