Preparation method of environmentally-friendly double-effect oil well blockage removal detergent

An environment-friendly, descaling agent technology, applied in chemical instruments and methods, earthwork drilling, wellbore/well components, etc., can solve the problems of less than 30% market share, unstable cleaning effect, and microbial death, and achieve reduction The effect of cleaning waste liquid treatment process agent cost, low production cost and simple preparation process

Inactive Publication Date: 2019-07-12
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Physical cleaning is to use various mechanical external forces and energy to crush the dirt and peel it away from the object. This method has a certain effect, but due to its infancy, low efficiency and less than 30% of the market share, it has not been widely popularized.
Microbial cleaning is the use of microorganisms to decompose the scale on the surface of the equipment, but as a living organism, the living environment of microorganisms is extremely harsh, and changes in the environment will cause the death of microorganisms, resulting in unstable cleaning effects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Preparation of oleyl-alcohol mixture: add separately to the reactor, condensate oil: 63kg, kerosene: 14kg, n-hexanol: 7kg, heptanol: 11 kg, AEO-9: 3.5 kg, Span-40: 1.5 kg, stirred and dissolved to obtain oleyl alcohol mixture;

[0025] (2) Preparation of Emulsion A: In a high-speed disperser, add water: 68L, oleyl-alcohol mixture described in step (1): 35L, stir for 1 hour at a speed of 1000 rpm, and then increase the speed to 2000 rev / min, react for 50min, leave overnight to obtain A emulsion;

[0026] (3) Preparation of liquid B: In the reactor, add water: 84kg, soluble starch: 0.2kg, heat to boil, cool to room temperature, then add ammonium chloride: 10 kg, sodium ethylenediamine tetramethylene phosphonate: 4 kg, disodium edetate: 2 kg, stirred and dissolved to obtain liquid B;

[0027] (4) Preparation of liquid C: Add water: 70kg, propionic acid: 6 kg, ethylenediamine: 5kg to the reactor, control the temperature at 65±2°C, stir, react for 60min, cool to room t...

Embodiment 2

[0030] (1) Preparation of oleyl-alcohol mixture: add separately to the reactor, condensate: 300g, kerosene: 80g, n-hexanol: 40g, heptanol: 60g, AEO-9: 15g, Span-40: 5g , stirring and dissolving to obtain an oleyl-alcohol mixture;

[0031] (2) Preparation of emulsion A: In a high-speed disperser, add water: 390mL, oleyl-alcohol mixture described in step (1): 210mL, stir for 1 hour at a speed of 1000 rpm, and then increase the speed to 2000 rev / min, react for 50min, leave overnight to obtain A emulsion;

[0032] (3) Preparation of liquid B: In the reactor, add water: 410g, soluble starch: 1.5g, heat to boil, cool to room temperature, then add ammonium chloride: 60g, sodium ethylenediamine tetramethylene phosphonate: 10g , disodium edetate: 15g, stirred and dissolved to obtain liquid B;

[0033] (4) Preparation of liquid C: Add water: 340g, propionic acid: 40g, ethylenediamine: 30g to the reactor, control the temperature at 65±2°C, stir, react for 60min, cool to room temperatur...

Embodiment 3

[0036](1) Preparation of oleyl-alcohol mixture: add separately to the reactor, condensate oil: 66kg, kerosene: 12kg, n-hexanol: 6kg, heptanol: 10 kg, AEO-9: 4 kg, Span-40: 2kg, stirred and dissolved to obtain an oleyl-alcohol mixture;

[0037] (2) Preparation of emulsion A: In a high-speed disperser, add water: 70L, oleyl-alcohol mixture described in step (1): 30L, stir for 1 hour at a speed of 1000 rpm, and then increase the speed to 2000 rev / min, react for 50min, leave overnight to obtain A emulsion;

[0038] (3) Preparation of liquid B: In the reactor, add water: 86kg, soluble starch: 0.1kg, heat to boil, cool to room temperature, then add ammonium chloride: 8kg, sodium ethylenediamine tetramethylene phosphonate: 2kg , disodium edetate: 4 kg, stirred and dissolved to obtain liquid B;

[0039] (4) Preparation of liquid C: In the reactor, add water: 74kg, propionic acid: 4kg, ethylenediamine: 3kg, control the temperature at 65±2°C, stir, react for 60min, cool to room temper...

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PUM

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Abstract

The invention discloses a preparation method of an environmentally-friendly double-effect oil well blockage removal detergent. The preparation method comprises the following steps: preparing an emulsion A from a mixture of water and oleyl alcohol in the presence of a surfactant; preparing a solution B from water, soluble starch, ammonium chloride, ethylenediaminetetramethylene phosphonic acid sodium and disodium ethylenediamine tetraacetate; preparing a solution C from water, propionic acid, ethylenediamine, magnesium chloride and glyoxal; and preparing a solution D from water, sodium dodecylbenzene sulfonate, OP-10 and betaine. The environmentally-friendly double-effect oil well blockage removal detergent prepared in the invention has a pH value of 6.0-7.5; a cleaning agent and cleaningwaste liquid are neutral, do not generate acid mist, and do not corrode equipment structures made of iron and steel, thereby achieving corrosion-free and safe blockage removal and scale removal; the blockage removal detergent not only can remove polymer material scale and asphaltene scale of rod pumping wells and screw pump wells, but also can remove inorganic scale such as calcium carbonate, magnesium carbonate, calcium sulfate, iron oxide and the like, and has advantages of double-effect performance, good thermal stability, safe use and environmental protection.

Description

technical field [0001] The invention relates to the field of chemical cleaning for oil recovery, descaling and plugging removal, in particular to a preparation and application method of an environment-friendly double-effect oil well descaling and descaling agent. Background technique [0002] Scaling of oil wells is reflected in the entire process of the flow of produced fluid, from the oil layer to the wellbore, the wellbore includes tubing and casing annulus; pumps and production equipment, etc. Due to changes in temperature, pressure, flow rate or liquid properties in these parts, scales are deposited on the surface, forming oil well scales. During the production process of the oil well, no matter where the scale is formed, it will seriously affect the normal production of the oil well. For example, the formation, oil pipe and other scaling can cause a sharp drop in production. Common scale deposits in oil fields are mainly calcium carbonate, calcium sulfate, barium sulf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/524C09K8/528E21B37/06
CPCC09K8/524C09K8/528E21B37/06
Inventor 李慧芝许崇娟裴梅山
Owner UNIV OF JINAN
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