Clear type high-efficient paraffin removal agent

Abstract

The invention provides a clean high-efficacy paraffin remover, composed of a low-density solvent 67-29.5%, a high-density solvent 30-67% and an oil-soluble permeate agent 0.5-3% in bulk percent, where the low-density solvent can be solvent oil, light oil, petroleum ether, etc, preferentially selecting the light oil. The high-density solvent is mainly heavy arene. The permeate agent can be permeate agents T, TX, OT and JFC, preferentially selecting permeate agent JFC. Its character: it complexes the low-density solvent and heavy arene which have cooperative effect in paraffin dissolving speed, making the mixed solvent not only have higher paraffin dissolving property but also higher density.

Description

Technical field: [0001] The invention relates to an oilfield chemical additive, in particular to a high-efficiency wax remover for oil wells. Background technique: [0002] Crude oil contains a certain amount of wax. Wax usually exists in a dissolved state in the formation. However, during the wellbore lifting process, as the pressure and temperature decrease and the light components continue to overflow, the wax in crude oil begins to crystallize and deposit in the wellbore. [0003] Waxed oil wells need to be dewaxed. Mechanical treatment was first used, and later developed into hot oil or steam hot washing. The mechanical treatment method uses a wax remover, a wax scraper or a wax scraper to scrape off the paraffin deposited on the pipe wall. This method has been used in oil fields for decades, and the effect is good, but sometimes mechanical failures damage the tubing or lose the wax removal effect due to the sliding of the wax scraper on the sucker rod. Mechanical t...

AI Technical Summary

Problems solved by technology

Due to the high toxicity of this kind of solvent, the sulfur in the solvent will poison the catalyst in the crude oil refining process, and the chlorine will corrode the refinery equipment, so this kind of solvent has been banned in my country in 1992, but in order to increase the density of the wax remover, Still add a certain amount of chlorinated hydrocarbons in the wax remover that uses at present, as the formula that CN1232855 introduces