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Elastoplastic micro-expansion cementing cement slurry and preparation method thereof

A cementing cement slurry and micro-expansion technology, which is applied in the field of cementing slurry, can solve the problems of poor suspension stability and settlement stability, reduced compressive strength of cement stone, and difficulty in mixing cement slurry, so as to achieve the top strength quickly, Improve the flexural strength and impact toughness, good effect of slurry settlement stability

Active Publication Date: 2018-06-26
ANTON OILFIELD SERVICES (GRP) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the effect of styrene / butadiene polymer on site is good and bad, and its compatibility with other systems is poor, and there are many examples of accidents. Significantly reduced strength
In addition, the existing cement slurry has problems such as difficulty in mixing slurry, poor fluidity, poor suspension stability and settlement stability, and low coincidence rate between large-scale experiments and small-sample experiments.

Method used

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  • Elastoplastic micro-expansion cementing cement slurry and preparation method thereof
  • Elastoplastic micro-expansion cementing cement slurry and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Combine 100 parts of G grade cement, 1 part of 2-acrylamido-2 methylpropanesulfonic acid polymer, 3 parts of silica powder (purity ≥98%, particle size of 0.1μm-0.3μm), microbial polysaccharide synthetic gum 0.5 parts of suspension stabilizer, 2 parts of polypropylene elastic plasticizer, 2 parts of magnesium oxide expansion agent, and 35 parts of silicon powder are mixed and stirred to obtain a dry mixed material;

[0030] Dissolve 1 part of 2-acrylamido-2 methyl propanesulfonic acid polymer retarder and 0.2 part of polyether defoamer in 44% water and stir evenly to obtain a wet mixed material;

[0031] Under the stirring condition of 4000 revolutions / min, the dry mixed materials are added to the wet mixed materials at a uniform speed (15s), and then stirred at 12000 revolutions / min for 35s evenly and defoamed. The prepared cement slurry is elastic and plastic Micro-expansion cement slurry. The performance of the above cement slurry was measured, and the results are shown i...

Embodiment 2

[0033] Combine 100 parts of G grade cement, 50 parts of iron ore powder, 5 parts of 2-acrylamido-2-methylpropanesulfonic acid polymer, and silica powder (purity ≥98%, particle size 0.1μm-0.3μm) 10 2 parts, 2 parts of aliphatic hydroxysulfonate condensate, 2 parts of microbial polysaccharide synthetic gum suspension stabilizer, 8 parts of polypropylene plasticizer, 5 parts of magnesium oxide expansion agent and 45 parts of silicon powder are mixed and stirred to obtain Dry mix material

[0034] Dissolve 3 parts of 2-acrylamido-2 methyl propanesulfonic acid polymer retarder and 0.2 part of polyether defoamer in 110 parts of water and stir evenly to obtain a wet mixed material;

[0035] Add the dry-mixed material to the wet-mixed material at a uniform speed (15s) under stirring at a speed of 4000 revolutions / min, and then stir at a speed of 12000 revolutions / min for 35s evenly and defoam. The prepared cement slurry is elastoplastic micro Expansive cement slurry. The performance of t...

Embodiment 3

[0037] Combine 100 parts of G-grade cement, 1.8 parts of 2-acrylamido-2 methylpropanesulfonic acid polymer, 3 parts of silica powder (purity ≥98%, particle size of 0.1μm-0.3μm), 0.8 parts of fat Group hydroxy sulfonate condensate, 0.8 parts of microbial polysaccharide synthetic gum suspension stabilizer, 3 parts of polypropylene plasticizer, 3 parts of magnesium oxide type expansion agent and 35 parts of silicon powder are mixed and stirred uniformly to obtain a dry mixed material;

[0038] Dissolve 1.2 parts of 2-acrylamido-2 methylpropanesulfonic acid polymer retarder and 0.2 parts of polyether defoamer in 55 parts of water and stir evenly to obtain a wet mixed material;

[0039] Add the dry-mixed material to the wet-mixed material at a uniform speed (15s) under stirring at a speed of 4000 revolutions / min, and then stir at a speed of 12000 revolutions / min for 35s evenly and defoam. The prepared cement slurry is elastoplastic micro Expansive cement slurry. The performance of the ...

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Abstract

The invention discloses elastic-plastic minimum inflation well cement slurry and a preparation method thereof. The elastic-plastic minimum inflation well cement slurry comprises the following components in parts by weight: 100 parts of oil well cement, 3-10 parts of high-temperature stabilizing agent, 0-50 parts of density modifier, 2-5 parts of fluid loss agents, 0.5-2 parts of dispersing agents, 0-3 parts of retarders, 35-110 parts of water, 0.2 part of defoaming agents, 0.5-2 parts of suspension stabilizing agents, 2-8 parts of elastic-plastic agents, 2-5 parts of expanding gents and 35-45 parts of silicon powder. The elastic-plastic minimum inflation well cement slurry provided by the invention can be used for increasing the rupture strength and impact toughness of the hardened cement paste.

Description

Technical field [0001] The invention relates to the technical field of cement slurry, in particular to an elastic-plastic micro-expansion cement slurry and a preparation method thereof. Background technique [0002] With the exploitation of oil and natural gas, in order to exploit oil and natural gas to a greater extent, some completed wells need to be subjected to secondary exploitation such as fracturing and acidizing. The cement stone is required to have high compressive strength, high toughness, high cementing strength, and high Corrosion resistance, etc. Therefore, the toughness, crack resistance and corrosion resistance of cement stone formed by oil well cement are the focus of attention of cementing workers. The elastoplastic micro-expansion cement is the use of elastic granular materials to prevent cracking and toughening to improve the impact resistance of cement stone, and use fiber materials to transfer stress in the cement stone to improve the impact resistance of ce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/467C09K8/487C04B28/00
CPCC04B28/00C09K8/467C09K8/487C04B2103/0035C04B2103/0068C04B2103/46C04B2103/408C04B2103/22C04B2103/0079C04B2103/50C04B2103/0082C04B14/04
Inventor 卢成辉罗洪文杨清江张昊汤勇王洁李保东
Owner ANTON OILFIELD SERVICES (GRP) LTD
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