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Paraffin removing and resisting agent for oil well

A wax-removing and wax-preventing technology, which is applied to drilling compositions, chemical instruments and methods, etc., can solve the problems of single use of wax-preventing agents and wax-removing agents, and achieve the effect of simplifying the adding process and being less corrosive.

Active Publication Date: 2012-02-22
BEIJING ENRUIDA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The purpose of the present invention is to solve the problem that the existing wax inhibitor and wax remover can only be used alone, and provide a preparation that can prevent wax and remove wax

Method used

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Examples

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Embodiment Construction

[0026] A kind of wax removal and anti-wax preparation for oil wells of the present invention, it is by 5-15% polyoxyethylene sorbitan oleate, preferably 10%; 15-25% polyoxyethylene octadecane Amine-8, preferably 20%; 20-30% polyoxyethylene oleyl ether-11, preferably 25%; 35-45% water, preferably 30% and 2-8% sodium acetate, most Preferably 5% composition.

[0027] Preparation performance index of the present invention is:

[0028] 1. Specific gravity: 0.93~1.04;

[0029] 2. pH value: 7.1~9.0;

[0030] 3. Anti-wax rate: >77%;

[0031] 4. Viscosity reduction rate: >74%.

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Abstract

The invention relates to paraffin removing and resisting agent for an oil well, which is composed of 5 to 15% of polyoxyethylenesorbitololeate, 15 to 25% of polyoxyethyleneoctadecylamine-8, 20 to 30% of polyoxyethyleneoleylether-11, 35 to 45% of water and 2 to 8% sodium acetate. The paraffin removing and resisting agent has no possibility of burning and explosion, is generally larger than 0.93 in specific gravity, can be added into a high water content oil well from a sleeve, is easy to sink to the well bottom, and can remove and resist paraffin. The paraffin removing and resisting agent not only can remove and resist the paraffin, but also can reduce viscosity. The paraffin removing and resisting agent has no corrosion performance, is small in corrosion on oil extraction equipment, lower than -30 DEG C in condensation point and suitable for being used in cold seasons, and can simplify chemicals adding procedures.

Description

technical field [0001] The invention relates to a wax removal and wax prevention preparation, in particular to a wax removal and wax prevention preparation for oil wells. Background technique [0002] The internal cause of waxing in oil wells is that crude oil contains wax, and the more wax content, the more serious the waxing. Under the condition of the oil layer, the wax is dissolved in the crude oil due to the high temperature of the medium. When the crude oil flows from the oil layer to the bottom of the well, and then rises from the bottom of the well to the wellhead, the solubility of the wax in the crude oil decreases due to the decrease of the pressure and temperature. And precipitated. Strictly speaking, wax refers to normal alkanes with a relatively high carbon number, usually greater than C 16 n-alkanes are called waxes. Paraffin wax is a mixture of various normal long-chain normal alkanes; ozokerite refers to isoparaffins or long-chain alkanes with naphthenes ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/524
Inventor 张晓瑞段维庆侯德霞
Owner BEIJING ENRUIDA TECH
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