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Emulsion suspended early strength agent and preparation method thereof

A technology of early-strength agent and emulsion, which is applied in the field of cementing early-strength agent and its preparation, can solve the problems of difficult early-strength agent compounding, construction accidents, difficult automatic control, etc., achieve good early-strength effect, improve early-strength, easy The effect of automatic control

Active Publication Date: 2021-12-03
CHINA OILFIELD SERVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most of the currently used low-temperature accelerators are mainly inorganic substances such as chlorides, sulfates, and silicates, and most of them are solid materials. During the construction of offshore well cementing, due to the influence of sea breeze, it is difficult to add them on site. Pre-mixing with Portland cement at the ash station in advance, and due to the relatively small amount of addition, it is impossible to achieve effective and uniform dry mixing with cement, which is likely to cause heterogeneity of cement and construction accidents
However, due to the limitation of solubility and other conditions, the liquid early strength agent prepared according to the above inorganic salt needs to be added in a large amount during use, which brings challenges to material preparation, transportation, and on-site construction strength.
Moreover, most of the existing early strength agents are solid inorganic salts and their complexes, and the dosage is mostly between 1% and 5%, which can be used for 1.5g / cm 3 -1.9g / cm 3 Cement slurry system; because it cannot be added in liquefaction, it cannot be used in LAS system (LIQUID ADDITIVESSYSTEM, full liquid additive system), it is difficult to control automatically, and the labor intensity is high; when the amount added is large, it needs to be dry-mixed with cement powder; it is difficult Compounded with liquid organic accelerators

Method used

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  • Emulsion suspended early strength agent and preparation method thereof
  • Emulsion suspended early strength agent and preparation method thereof
  • Emulsion suspended early strength agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] 1) Weigh 3.4g Span-80 and 3.6g polyethylene glycol octylphenyl ether, add 300ml of mineral oil (Escaid110), stir at 11000 rpm for 10min at high speed;

[0086] 2) Dissolve 50g of calcium chloride in 100ml of distilled water to prepare a calcium chloride solution; add 2.2g of triethanolamine to the solution and stir evenly;

[0087] 3) Take 100ml of the above solution, add it into mineral oil with emulsifier and wetting agent at 11000 rpm, and keep stirring at high speed for 10min;

[0088] 4) Add 2.6g of octadecyltrimethylammonium chloride and keep stirring at high speed for 5 minutes;

[0089] 5) Add 40g of calcium hydroxide and 220g of calcium carbonate in sequence, and keep stirring at high speed for 10 minutes to obtain the emulsion suspension early strength agent; wherein the particle size of calcium hydroxide is 1250 mesh, and the particle size of calcium carbonate is 1250 mesh.

Embodiment 2

[0091] 1) Weigh 2.8g Span-80 and 4.2g polyethylene glycol octylphenyl ether, add 300ml of mineral oil (Escaid110), stir at 11000 rpm for 10min at high speed;

[0092] 2) Dissolve 50g of calcium chloride in 100ml of distilled water to prepare a calcium chloride solution; add 3.8g of diethanol monoisopropanolamine to this solution and stir evenly;

[0093] 3) Take 100ml of the above solution, add it into mineral oil with emulsifier and wetting agent at 11000 rpm, and keep stirring at high speed for 10min;

[0094] 4) Add 3.2g of octadecyltrimethylammonium chloride and keep stirring at high speed for 5 minutes;

[0095] 5) Add 80g of calcium hydroxide and 320g of calcium carbonate in sequence, and keep stirring at high speed for 10 minutes to obtain the emulsion suspension early strength agent; the particle size of calcium hydroxide is 1250 mesh, and the particle size of calcium carbonate is 1250 mesh.

Embodiment 3

[0097] 1) Weigh 1.7g Span-80 and 2.4g polyethylene glycol octylphenyl ether, add 300ml of mineral oil (Escaid110), stir at 11000 rpm for 10min at high speed;

[0098] 2) Dissolve 50g of calcium chloride in 100ml of distilled water to prepare a calcium chloride solution; add 2.2g of triethanolamine to the solution and stir evenly;

[0099] 3) Take 100ml of the above solution, add it into mineral oil with emulsifier and wetting agent at 11000 rpm, and keep stirring at high speed for 10min;

[0100] 4) Add 2.6g of octadecyltrimethylammonium chloride and keep stirring at high speed for 5 minutes;

[0101] 5) Add 40g of calcium hydroxide and 220g of calcium carbonate in sequence, and keep stirring at high speed for 10 minutes to obtain the emulsion suspension early strength agent; wherein the particle size of calcium hydroxide is 1250 mesh, and the particle size of calcium carbonate is 1250 mesh.

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Abstract

The invention relates to an emulsion suspended early strength agent and a preparation method thereof. The emulsion suspended early strength agent comprises the following components: 0.1-2 parts of organic alcohol amine; 5-10 parts of alkali metal chloride or alkaline earth metal chloride; 5-10 parts of alkali metal hydroxide or alkaline earth metal hydroxide; 30-50 parts of alkali metal carbonate or alkaline earth metal carbonate; 10-80 parts of mineral oil; 1-3 parts of an emulsifier; 0.2-0.8 part of a wetting agent; 0-3.5 parts of a flow pattern regulator; and 10-20 parts of water. The emulsifier is selected from one or more of nonionic emulsifiers. The emulsion suspended early strength agent has the advantages of small dosage, high strength and the like; and the thickening time of the cement paste at low temperature can be effectively shortened, and the low-temperature strength of the cement paste is improved.

Description

technical field [0001] This article relates to a cementing early strength agent and a preparation method thereof, especially an emulsion suspension early strength agent and a preparation method thereof. Background technique [0002] In the oil field cementing industry, a large amount of Portland cement is used as the base material of cementing slurry, and slow hydration at low temperature is an important inherent property of Portland cement. With the deepening of the exploration and development of deepwater oil and gas resources in the ocean, the water depth after drilling is getting deeper and the seabed temperature is getting lower and lower, which brings more and more challenges to the performance of deepwater cementing slurry. Among them, low temperature Under these conditions, the low-temperature thickening performance and low-temperature strength requirements of cement slurry are particularly significant. In order to solve this problem, it is a widely used measure to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/32C04B103/10
CPCC04B40/0039C04B2103/10C04B24/045C04B24/32C04B24/00C04B22/124C04B24/122C04B24/005C04B22/064C04B14/28Y02W30/91
Inventor 马春旭侯亚伟肖伟宋维凯房恩楼李屹许前富王伟于斌赵军
Owner CHINA OILFIELD SERVICES
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