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A cleaning agent for removing latex deposits and its preparation method and application

A technology for deposits and cleaning agents, applied in the field of cleaning agents and cleaning agents for removing latex-like deposits, can solve the problems of complex process, difficult operation, and consumption of cleaning agents, and achieve simple preparation process, good stability, and environmentally friendly formula Effect

Active Publication Date: 2020-02-14
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process is relatively complicated, and the whole process needs to be shut down, and the deposit it targets is sulfur scale, and the formula is mainly sulfur solvent
[0008] Chinese patent application CN104152127A discloses a multifunctional cleaning agent for oil fields and its preparation method. Although it is a multifunctional cleaning agent, it has many limitations
First of all, nonylphenol polyoxyethylene ether surfactants are used in the components of the cleaning agent, which will quickly decompose into nonylphenol in the environment, and nonylphenol is a recognized environmental hormone, which is extremely It is harmful and has been banned internationally; secondly, the use temperature of the cleaning agent needs to reach 60-80°C, while the temperature of the ground gathering and transportation system in actual production is generally room temperature, and the maximum temperature is generally not higher than 50°C. This has just limited its application in actual production conditions; In addition, the amount of the cleaning agent reaches more than 1.5 times the internal volume of the gathering pipeline, and it needs to be washed repeatedly, which will cost a lot of money for the gathering pipeline of several kilometers long Cleaning agent is very difficult to operate
Finally, the cleaning principle of the cleaning agent for oily substances is solubilization and dispersion, that is to say, the oily substances remain in the water body after cleaning, that is, the emulsification of gas field water, which will be very important for the discharge or reinjection of gas field water. challenge
[0009] To sum up, the existing natural gas pipeline cleaning agent technology is relatively small, and there are still many deficiencies, it is difficult to meet the environment of field application in oil and gas fields.

Method used

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  • A cleaning agent for removing latex deposits and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] This embodiment provides a cleaning agent for removing latex deposits, which is prepared by the following method:

[0049] 30 kg of ethylene glycol monobutyl ether, 40 kg of didecyl dimethyl ammonium chloride, 1 kg of polyetheramine (D230) with a molecular weight of 230, 5 kg of oleic acid imidazoline corrosion inhibitor, 5 kg of poly Dimethylsiloxane (PMX-200) defoamer, 19 kilograms of sodium bicarbonate solution with a mass concentration of 0.5% were placed in a reaction kettle, and stirred at 100 r / min for 15 minutes at 20 ° C to obtain this example cleaning agent.

Embodiment 2

[0051] This embodiment provides a cleaning agent for removing latex deposits, which is prepared by the following method:

[0052] 20 kg of ethylene glycol dibutyl ether, 20 kg of didecyl dimethyl ammonium chloride, 10 kg of didodecyl dimethyl ammonium bromide, 0.5 kg of polyether amine (D2000) with a molecular weight of 2000 , 10 kilograms of castor oil alkyd amide corrosion inhibitor, 10 kilograms of polyoxyethylene and polyoxypropylene block copolymer (GPE30) defoamer, 29.5 kilograms of mass concentration are 0.5% sodium chloride solution placed in the reactor , and stirred at 600 r / min for 10 min under the condition of 22° C. to obtain the cleaning agent of this embodiment.

Embodiment 3

[0054] This embodiment provides a cleaning agent for removing latex deposits, which is prepared by the following method:

[0055] With 30 kilograms of diethylene glycol monobutyl ether, 30 kilograms of didecyl dimethyl ammonium chloride, 5 kilograms of molecular weight polyetheramine (D400) of 400, 2 kilograms of coconut oil alkylamine corrosion inhibitor, 3 One kilogram of polydimethylsiloxane (PMX-200) defoamer, 30 kilograms of mass concentration are 0.5% sodium carbonate solution is placed in the reaction kettle, under the condition of 24 ℃, stir 10min with 500r / min, obtain this implementation Examples of cleaning agents.

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Abstract

The invention provides a cleaning agent for removing emulsion deposits and a preparation method and application of the cleaning agent. The cleaning agent for removing the emulsion deposits comprises,by 100 parts of weight, 10-30 parts of glycol ether compounds and esterification products of glycol ether compounds and alkyl carboxylic acid compounds, 10-40 parts of a double alkyl chain quaternaryammonium salt cationic surfactant, 0.1-5 parts of polyether amine compounds, 0-10 parts of a corrosion inhibitor, 0-10 parts of a defoaming agent and the balance water or saline water. The invention further provides a preparation method of the cleaning agent for removing the emulsion deposits. The cleaning agent can effectively remove the emulsion deposits of a gathering and transportation systemand has the advantages that the formula is environmentally friendly, the usage amount is low, the cleaning effect is good, oil and water are separated after cleaning, and a using method is simple.

Description

technical field [0001] The invention relates to a cleaning agent, in particular to a cleaning agent for removing latex deposits, and belongs to the technical field of composite materials. Background technique [0002] The natural gas extracted from natural gas wells will be mixed with impurities and solid substances at the bottom of the well, so the extracted natural gas needs to be separated and purified by a separator before being transported. However, the separator cannot separate some of the heavy hydrocarbon compounds and fine solid particles in the natural gas, so these substances will be transported together with the natural gas, so there will be aggregates of heavy hydrocarbon compounds and fine solid particles in the gathering and transportation system. With the increase of aggregates, fine solid particles are easily coated by heavy hydrocarbons and other chemicals in the gathering system, forming latex-like deposits. This latex-like deposit can firmly adhere to th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23G1/26C23G5/036C23G5/032
CPCC23G1/26C23G5/032C23G5/036C09K8/524C09K8/54
Inventor 江晶晶余华利张强谷坛窦丽媛
Owner PETROCHINA CO LTD