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Slow-release chemical paraffin removing ball, and preparation method and applications thereof

A wax-removing ball and slow-release technology, which is applied in the field of slow-release chemical wax-removing balls and their preparation, can solve the problems that the wax-removing balls are easily stuck and the wax-removing balls have no anti-wax, etc., and achieves low price and high effect. Stable, simple preparation method

Active Publication Date: 2019-06-18
XI'AN PETROLEUM UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method requires regular investment and recovery. Due to the existence of pipe welds, bends, and variable diameters, the wax removal ball is also easy to get stuck, and this kind of wax removal ball has no wax-proof effect.

Method used

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  • Slow-release chemical paraffin removing ball, and preparation method and applications thereof
  • Slow-release chemical paraffin removing ball, and preparation method and applications thereof
  • Slow-release chemical paraffin removing ball, and preparation method and applications thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0035] The preparation method of the wax removing ball includes the following steps:

[0036] 1) According to different crude oil properties, weigh a certain quality of sodium stearate, polyoctadecyl acrylate, JFC, Tween-80 or Span-65 according to different formulations, and dissolve the liquid ingredients in the solid ingredients for use.

[0037] 2) Place the EVA in an iron container, heat it on an electric furnace at 150°C-200°C until the EVA is in a fluid state, then mix the medicine prepared in step 1) with the EVA according to the ratio, and heat again at 150°C-200°C Until the mixture is in a fluid state, a high-temperature liquid mixture is obtained.

[0038] 3) Pour the high temperature liquid mixture obtained in step 2) into a spherical mold and cool to room temperature.

[0039] Since the wax inhibitor is evenly distributed inside the wax ball, and sodium carboxymethyl cellulose can slowly release the sodium stearate into the crude oil, after one shot of the ball, when the w...

Embodiment 1

[0041] For paraffin-based crude oil with water content below 20%, sodium stearate is selected as the main water-soluble surfactant, polyoctadecyl acrylate is used as a pour point depressant to reduce the precipitation rate of paraffin, and sodium carboxymethyl cellulose is used as a slow release JFC is used as a penetrant, and Span-65 is used as a co-solvent to increase the dissolving effect of the first two drugs. When preparing, melt 40% EVA in a container at high temperature, and then 50% sodium stearate, 1% carboxymethyl cellulose, 3% polyoctadecyl acrylate, 3% JFC and 3% Span- 65 into the beaker and mix well. The uniformly mixed medicine and liquid EVA are mixed uniformly, and the mixture is placed in a spherical mold for cooling and molding.

Embodiment 2

[0043] For paraffin-based crude oil with a water content of 20%-50%, sodium stearate is selected as the main water-soluble surfactant, polyoctadecyl acrylate is used as a pour point depressant to reduce the precipitation rate of paraffin, carboxymethyl cellulose Sodium is used as a slow release agent, JFC is used as a penetrant, and Tween-80 is used as a cosolvent to increase the dissolution effect of the first two drugs. When preparing, melt 40% EVA in a container at high temperature, and then 50% sodium stearate, 3% carboxymethyl cellulose, 3% polyoctadecyl acrylate, 2% JFC and 2% Tween- Put 80 into the beaker and mix well. The uniformly mixed medicine and liquid EVA are mixed uniformly, and the mixture is placed in a spherical mold for cooling and molding.

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Abstract

The invention provides a slow-release chemical paraffin removing ball, and a preparation method and applications thereof. The slow-release chemical paraffin removing ball is prepared through followingsteps: EVA and a paraffin inhibitor are mixed, and an obtained mixture is prepared into balls. The slow-release chemical paraffin removing ball comprises, by mass, 40 to 50% of EVA, 40 to 50% of sodium stearate, 1 to 5% of carboxymethyl cellulose, 2 to 3% of a pour-point depressant, and 2 to 3% of a cosolvent. According to the slow-release chemical paraffin removing ball, EVA is taken as a sphereskeleton, and physical paraffin control effect is achieved; the contained medicines are taken as paraffin inhibitors, and chemical paraffin control effect is achieved; the paraffin inhibitors are mixed in EVA, carboxymethylcellulose sodium is taken as a slow release agent, so that sodium stearate can be released in crude oil at a slow speed, long lasting effect is achieved, paraffin control treatment on different parts of a whole pipeline can be realized; and the pour-point depressant is capable of reducing paraffin precipitate rate.

Description

Technical field [0001] The invention belongs to the field of crude oil transportation, and relates to a slow-release chemical wax removal ball and a preparation method and application thereof. Background technique [0002] The crude oil produced in many oil fields contains a certain degree of wax. As the temperature and pressure drop and the light components escape, the wax dissolving ability of the crude oil also decreases. During the transportation of waxy crude oil, as the transportation distance increases, the temperature of the crude oil continues to decrease, and the wax in the crude oil gradually precipitates. The wax precipitated from the crude oil will adhere to the pipe wall, thereby reducing the cross-sectional area of ​​the pipeline. The fluidity of the oil gets worse, increases the energy consumption during the crude oil transportation process, reduces the gathering and transportation efficiency, and in severe cases, it will cause excessive pipeline pressure, overloa...

Claims

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Application Information

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IPC IPC(8): C11D1/04C11D3/60C11D3/37C11D3/20B08B9/027B08B9/055B29C39/00B29C39/02
Inventor 燕永利尹丰丰牛梦龙贺炳成寇卫伟豆龙龙
Owner XI'AN PETROLEUM UNIVERSITY
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