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An oil-based wax remover for oil wells

An oil-based and wax-removing agent technology, which is applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of low flash point, non-environmental protection, high sulfur and chlorine content, etc.

Active Publication Date: 2018-01-09
CHINA PETROLEUM & CHEM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Most of the current oil-based wax removers are prepared from petroleum industry products, including various solvent oils, gasoline, and kerosene fractions. These crude products generally contain a large amount of sulfur and chlorine elements, which are not environmentally friendly.
Moreover, these products have low flash points and potential safety hazards. For example, the patent publication number is CN1076002A, and the wax remover components of CN200410023491.8 contain industrial solvent oil and sherwood oil. The flash point is lower than 0 ° C, and the content of sulfur and chlorine is high. It is neither environmentally friendly nor safe

Method used

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  • An oil-based wax remover for oil wells

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] By volume, mix 25% of xylene, 10% of trimethylbenzene, 15% of octane, 40% of white mineral oil, 10.6% of penetrant F33, 7.05% of n-octanol and 2.35% of n-pentanol, and the obtained liquid is The properties of wax remover 1 of the present invention are shown in Table 2.

Embodiment 2

[0026] By volume, mix 29% of xylene, 12% of trimethylbenzene, 14% of octane, 41% of white mineral oil, 10.67% of penetrant F34, 1.1% of n-octanol and 0.055% of n-pentanol, and the obtained liquid is Wax remover 2 of the present invention.

[0027] Table 2 wax remover performance

[0028] Exterior

[0029] It can be seen from Table 2 that the paraffin remover has a wax melting rate >20mg / min, an open flash point >40°C, a freezing point <-60°C, and does not contain sulfur or chlorine.

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Abstract

The invention provides an oil-base paraffin remover for oil wells, which is composed of aromatic hydrocarbon, saturated alkane, a penetrant and a solubilizer. The paraffin remover is composed of the following components in percentage by volume: 30-45% of aromatic hydrocarbon, 45-65% of saturated alkane, 0.1-1% of penetrant and 1.0-11.0% of solubilizer. The components are mixed by volume and stirred uniformly to obtain the paraffin remover. The density is 0.8-0.9 g / cm<3>; the paraffin dissolution rate is greater than 20mg / minute; the paraffin remover is free of sulfur and chlorine; the open flash point is greater than 40 DEG C; and the solidifying point is lower than -60 DEG C. The paraffin remover has the advantages of high flash point, high paraffin dissolution rate, environment friendliness and low toxicity, and well solves the problem of balance between the paraffin removal product rate and the environment friendliness and safety.

Description

technical field [0001] The invention relates to an oil-based wax remover for oil wells, belonging to the application field of oilfield chemistry. Background technique [0002] Wax deposition in oil wells is common in oilfield development. Wax deposition increases the load of the pumping unit, reduces the pump efficiency, decreases the production of the oil well, reduces the oil recovery rate, and even directly blocks the oil pipe, causing the oil well to stop production. Therefore, wax removal and prevention in oil wells is an important technical measure to ensure the normal production of waxy crude oil. There are many kinds of wax removal methods at present, and the use of chemical agents to remove wax from oil wells has low cost, better effect and quick effect, and is currently widely used. Most of the current oil-based wax removers are prepared from petroleum industry products, including various solvent oils, gasoline, and kerosene fractions. These crude products genera...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/524
CPCC09K8/524
Inventor 蔡万伟付道明张同义刘欢乐姚志良吴俊霞赵旭毛军朱明翟向萍袁东平
Owner CHINA PETROLEUM & CHEM CORP
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