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Corrosion-release scale-proof wax-removal viscosity-reducing agent and preparation method thereof

A technology of corrosion inhibition, scale inhibition and viscosity reduction agent, which is applied in oil well corrosion inhibition, scale inhibition, wax removal and viscosity reduction agent, oil well corrosion inhibition, scale inhibition, wax removal and viscosity reduction agent. It can solve the problems of poor compatibility and achieve the effect of improving compatibility, meeting the requirements of wax removal and viscosity reduction, and meeting the requirements of anti-corrosion and anti-scaling

Active Publication Date: 2009-07-15
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a corrosion inhibition, scale, wax, and viscosity reducing agent and its preparation method, improve the compatibility of the agents, and use the corrosion, scale, wax, and viscosity reducing agent to realize both wax removal and anti-corrosion and scale prevention. , to solve the problem of poor compatibility between conventional wax-removing and viscosity-reducing agents and anti-corrosion and anti-scaling agents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Embodiment 1: the weight ratio of the raw materials of the corrosion inhibitor, scale inhibitor, wax remover and viscosity reducer is: 2-alkyl-1-hydroxyethyl-3-hydroxypropyl imidazoline sodium phosphate: 8%, dodecyl dimethyl Benzyl ammonium chloride: 12%, FC-N01 fluorocarbon surfactant: 0.1%, alkylphenol polyoxyethylene (14) ether: 5%, formaldehyde: 4.5%, hexamethylenetetramine: 10%, Sodium hexametaphosphate: 6%, hydroxyethylidene diphosphonic acid: 6% and water: 48.4%.

[0042] Preparation process: first, 2-alkyl-1-hydroxyethyl-3-hydroxypropyl imidazoline sodium phosphate, dodecyl dimethyl benzyl ammonium chloride, FC-N01 fluorocarbon surfactant, alkyl Eight kinds of raw materials, such as phenol polyoxyethylene (14) ether, formaldehyde, hexamethylenetetramine, sodium hexametaphosphate, and hydroxyethylidene diphosphonic acid, were added in proportion to the normal pressure enamel reaction kettle. Slowly raise the temperature to 55°C. After 30 minutes of constant sti...

Embodiment 2

[0043] Embodiment 2: The weight ratio of raw materials of the corrosion inhibitor, scale inhibitor, wax remover and viscosity reducer is: 2-alkyl-1-hydroxyethyl-3-hydroxypropyl imidazoline sodium phosphate: 6%, dodecyl dimethyl Benzyl ammonium chloride: 10.3%, FC-N01 fluorocarbon surfactant: 0.07%, alkylphenol polyoxyethylene (14) ether: 5%, formaldehyde: 4.5%, hexamethylenetetramine: 11%, Sodium hexametaphosphate: 6%, hydroxyethylidene diphosphonic acid: 6% and water: 51.13%.

[0044] The preparation process is the same as in Example 1.

Embodiment 3

[0045] Embodiment 3: The weight ratio of the raw materials of the corrosion inhibitor, scale inhibitor, wax remover and viscosity reducer is: 2-alkyl-1-hydroxyethyl-3-hydroxypropyl imidazoline sodium phosphate produced by China Daily Chemical Industry Research Institute: 9 %, dodecyl dimethyl benzyl ammonium chloride: 13.5%, FC-N01 fluorocarbon surfactant: 0.15%, alkylphenol polyoxyethylene (14) ether produced by Lushun Chemical Factory: 7.7%, formaldehyde : 6.5%, hexamethylenetetramine: 13.6%, sodium hexametaphosphate: 7.6%, hydroxyethylidene diphosphonic acid: 7.6% and water: 34.53%.

[0046] The preparation process is the same as in Example 1.

[0047] Evaluation of corrosion inhibition rate

[0048] Corrosion experiments were carried out on carbon steel coupons, and the production fluids with and without the addition of this corrosion inhibitor, scale remover, wax and viscosity reducer in the field wells were used for comparison, and the corrosion inhibition rate was calc...

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Abstract

A viscosity reducer with corrosion-inhibiting, scale-inhibiting and wax-cleaning functions consists of 2-alkyl-1-hydroxyethyl-3-hydroxypropyl-imidazoline sodium phosphate 5-10 wt%, lauryl dimethyl benzyl ammonium chloride 10-15 wt%, FC-NO1 fluorocarbon surface activator 0.05-0.2 wt%, alkylphenol ethoxylates(14) 3-8 wt%, methanal 3-7 wt%, hexamine 8-15 wt%, hexa-sodium metaphosphate 5-8 wt%, hydroxy-ethyl-crossing di-phosphoric acid 5-8 wt% and water residues. It has excellent coordination and corrosion protection and can be used in oil filed and oil well.

Description

technical field [0001] The invention relates to the technical field of oilfield chemistry, in particular to an oil well corrosion inhibition, scale, wax, and viscosity reducing agent, which is applied to oil wells for corrosion, scale, wax, and viscosity reduction. Background technique [0002] After the oilfield development enters the medium-high water cut period, due to long-term immersion in corrosive well fluid, the oil well casing is corroded, and the inner wall of the casing is seriously scaled. To maintain oil production for a long time, chemical agents must be used to reduce the corrosion rate and reduce or remove scale. In addition, in the late stage of oilfield development, oil wells need to use chemical agents to remove wax and reduce viscosity to increase production capacity. However, the compatibility of the two agents for corrosion and scale removal and wax removal and viscosity reduction is poor, and it is not conducive to the use of the agents in the same we...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/524
Inventor 付亚荣蔡远红田炜吴泽美刘建华李冬青潘传英蒲祥金陈宝新孔繁勋陈鲲
Owner PETROCHINA CO LTD
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