Oil well dispersive wax-proofing agent and preparation method thereof

Abstract

The invention relates to an oil well dispersive wax-proofing agent which is applicable to wax proofing of a petroleum well. The invention is characterized in that the oil well dispersive wax-proofing agent comprises the following ingredients according to weight percentage: 5-7% of polyoxyethylenealkylphenol ether, 6.5-9.5% of sorbitan mono lauryl alcohol polyoxyethylene ether, 0.5-1.0% of potassium chloride, 0.05-0.1% of fluorocarbon surfactant FN-3, 0.5-1.0% of Vitamin C, 10-15.5% of polyoxyethylene alkylphenol ether carboxylic sodium, 0.005-0.01% of 6-chlorobenzotriazole-1,1,3,3-tetramethylcarbamidehexafluoroosphate, and the allowance of water. The invention has the effects that for an oil well with water content of high than 30%, the oil well dispersive wax-proofing agent can prolong the thermal cleaning cycle of the oil well by 2-4.5 times when the adding amount is 0.05-0.1% in daily oil well maintenance.

Description

technical field [0001] The invention belongs to the technical field of chemicals used in the petroleum industry, in particular to an oil well dispersed wax inhibitor and a preparation method thereof. It is an oil well dispersing wax inhibitor that prevents wax deposition in oil wells and prolongs the hot washing cycle and pump inspection cycle of oil wells. Background technique [0002] During the exploitation of waxy crude oil in my country, in the production process of oil wells, due to the wax deposition in the oil wells, the upward load and downward resistance of the pumping wells increase, which easily causes the sucker rod to break, and at the same time increases the energy consumption of oil production. The solutions are generally mechanical wax scraping, hot oil (water) wax removal, chemical wax removal, thermal cable wax removal, magnetic wax removal, glass coating tubing wax removal, and bacterial wax removal. These methods have been field tested on a large scale....

AI Technical Summary

Problems solved by technology

At present, the most commonly used oil-based wax remover has a quick effect, is the most widely used, and has a wide source of raw materials, but the oil-based wax remover is not suitable for oil wells with high water content, and the expected effect of wax removal and prevention cannot be achieved after adding the drug

Moreover, the safety of oil-based wax removers is poor, and the scope of use of oil-based wax removers is more and more limited

[0003] At present, wax removal and anti-wax in oil fields are mainly based on wax removal, supplemented by wax control, and the wax control work is relatively weak. At the same time, conventional wax control agents use EVA or 18-21 alkyl 18-21 ester as the main raw material , but this kind of anti-wax agent has a low freezing point and is in a solid state. It is difficult to add it on site, and it is not easy to promote