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Early strength agent composition and preparation method thereof, cement composition and uses of above

The technology of a composition and an early-strength agent, which is applied in the field of early-strength agent composition and its preparation, can solve the problems of slow hydration speed, shortened cement slurry thickening time, long waiting time and the like

Active Publication Date: 2013-09-25
CHINA UNITED COALBED METHANE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the article "Laboratory Research on Low-temperature Early-strength Agents for Oil Well Cement" (Yang Yuanguang, Zhang Jiyin, Ma Siping, "Journal of Southwest Petroleum University (Natural Science Edition) 2009 / 01"), under low temperature conditions, the hydration rate of cement slurry is slow, and the Long setting time can easily cause oil, gas, and water flooding, resulting in poor cementing quality and the fact that there are few early-strength agents available for low-temperature shallow cementing in oilfields. According to the principle of oil well cement hydration and low-temperature early-strength , select water-soluble chlorine-free industrial raw materials with low-temperature early-strength effect on oil well cement, and develop a new type of chlorine-free water-soluble low-temperature early-strength agent ZC-2S
[0004] The low-temperature early strength agents reported above can significantly shorten the thickening time of cement slurry and improve the early compressive strength of cement stone, but they cannot make the cement slurry change from liquid to solid quickly and effectively control the loss of cement slurry.

Method used

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  • Early strength agent composition and preparation method thereof, cement composition and uses of above
  • Early strength agent composition and preparation method thereof, cement composition and uses of above
  • Early strength agent composition and preparation method thereof, cement composition and uses of above

Examples

Experimental program
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Effect test

Embodiment 1

[0060] Embodiment 1 Accelerator composition A1

[0061] Prepare the accelerator composition A1 as follows: get 31 kilograms of calcium formate (Ca(HCOO) 2 ), 15 kg of calcium metaaluminate (Ca(AlO 2 ) 2 ), 45 kg of ferric chloride (FeCl 3), and 19 kg of lithium carbonate (Li 2 CO 3 ), these materials are mixed uniformly at normal temperature and pressure to obtain the accelerator composition A1 of the present invention.

Embodiment 2

[0062] Embodiment 2 early strengthening agent composition A2

[0063] Prepare the accelerator composition A2 as follows: get 25 kilograms of calcium formate (Ca(HCOO) 2 ), 13 kg of calcium metaaluminate (Ca(AlO 2 ) 2 ), 40 kg of ferric chloride (FeCl 3 ), and 22 kg of lithium carbonate (Li 2 CO 3 ), these materials are mixed homogeneously at normal temperature and pressure to obtain the accelerator composition A2 of the present invention.

Embodiment 3

[0064] Example 3 Cement Compositions B1 to B7

[0065] Taking accelerator composition A2 as an example, a cement composition was prepared. The cement compositions B1 to B7 were prepared as follows: Add a certain percentage of the accelerator composition A2 of the present invention to Shengwei G grade cement to obtain the cement compositions B1 to B7 of the present invention. The amounts of the accelerator composition A2 added in the cement compositions B1 to B7 are respectively: 1.0%, 1.5%, 2.0%, 2.5%, 3.0%, 3.5% and 4.0%.

[0066] Test 1: Compressive strength at 25°C for 24 hours

[0067] Prepare cement compositions B1 to B7 into cement pastes 1 to 7 according to the GB10238-88 standard, the water-cement ratio is 0.44, and the cement paste density is 1.92g / cm 3 . According to Chapter 7 of the standard GB / T 19139-2003 "Oil Well Cement Test Methods", the compressive strength of cement slurries 1 to 7 at different curing temperatures was measured, and the evaluation results a...

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Abstract

The present invention relates to an early strength agent composition, which comprises the following materials, by weight, 15-40 parts of a soluble organic calcium compound, 5-25 parts of calcium metaaluminate (Ca(AlO2)2), 25-55 parts of a metal chloride, and 10-28 parts of an alkali metal carbonate (M2CO3), wherein M is an alkali metal. The present invention further relates to a preparation method for the early strength agent composition, a cement composition containing the early strength agent composition. The present invention further relates to uses of the compositions in cementing application.

Description

technical field [0001] The present invention generally relates to an early strength agent composition, a preparation method thereof, and a cement composition including the early strength agent composition. The present invention also relates to the use of the accelerator composition and the cement composition in well cementing applications. Background technique [0002] Early strength agent is a commonly used cement admixture, which accelerates the development of early strength of concrete. In engineering construction, it is often hoped that the cement slurry has a higher strength in the early stage. After the cement slurry is quickly set to bear a certain load, the next process is carried out. Therefore, early strength agents are widely used in projects. In drilling engineering, in order to improve the cementing quality and reduce the risk of cement slurry leakage, it is also necessary to use an early strength agent that can quickly set the cement slurry. [0003] Coalbed ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/04C04B28/04C09K8/467
Inventor 冯三利周卫东王成文孙晗森王瑞和
Owner CHINA UNITED COALBED METHANE
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