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A cementing latex cement slurry system and preparation method thereof

A technology of cement slurry and cementing glue, applied in chemical instruments and methods, drilling composition and other directions, can solve the problems of high brittleness, poor flexibility, poor impermeability, etc., achieve strong impermeability, avoid channeling , the effect of good rheological properties

Active Publication Date: 2020-05-08
YANGTZE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the problems existing in the prior art, the purpose of the present invention is to provide a cementing latex cement slurry system and

Method used

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  • A cementing latex cement slurry system and preparation method thereof
  • A cementing latex cement slurry system and preparation method thereof
  • A cementing latex cement slurry system and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0020] A method for preparing the cementing latex cement slurry system as described above includes the following steps:

[0021] Step (1): Wet-mix water, fluid loss agent, latex, retarder, defoamer, and dispersant at a stirring rate of 2000-2500r / min and stir evenly;

[0022] Step (2): dry-mix expansion agent, plasticizer and cement uniformly;

[0023] Step (3): Add the dry mixture to the wet mixture at a stirring rate of 4000 to 4500 r / min, and then stir and mix uniformly at a rate of 10000 to 12000 r / min.

Example Embodiment

[0024] Example 1

[0025] A cementing latex cement slurry system, in parts by weight, including the following components: 2 parts of expansion agent, 1 part of plasticizer, 1.5 parts of fluid loss agent, 15 parts of latex, 0.8 parts of defoamer, and retarder 1.5 parts, 0.8 parts of dispersant, 34 parts of water, 100 parts of cement (Jiahua G-grade cement). Among them, the defoaming agent is an organosilicon compound, the plasticizer is an aliphatic dibasic acid ester compound, and the latex and retarder are all based on (2-acrylamido-2-methylpropanesulfonic acid) as a functional monomer Copolymer, dispersant is sulfonated melamine formaldehyde resin.

[0026] Preparation method: (1) Wet-mix water, fluid loss agent, latex, retarder, defoamer, and dispersant at a stirring rate of 2000r / min and stir uniformly; (2) Dry the expansion agent, plasticizer and cement Mix uniformly; (3) Add the dry mixture to the wet mixture in batches at a stirring rate of 4000r / min, and then stir and mix...

Example Embodiment

[0031] Example 2

[0032] A cementing latex cement slurry system, in parts by weight, includes the following components: 1.5 parts of expansion agent, 1.3 parts of plasticizer (production model: AK600), 1.5 parts of fluid loss agent, and 20 parts of latex (production model: AK-J2), 1.2 parts of defoamer (production model: BP-1B), 1.5 parts of retarder (production model: AK200R), 1 part of dispersant (production model: AK300-1), 34 parts of water, 100 cement Copies (Ka Wah Grade G Cement).

[0033] Preparation method: (1) Wet-mix water, fluid loss agent, latex, retarder, defoamer, and dispersant at a stirring rate of 2000r / min and stir uniformly; (2) Dry the expansion agent, plasticizer and cement Mix uniformly; (3) Add the dry mixture to the wet mixture in batches at a stirring rate of 4500r / min, and then stir and mix evenly at a rate of 10000r / min to obtain a cementing latex cement slurry system. The elastic modulus and compressive strength obtained through the test are shown in...

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Abstract

The invention discloses a cementing latex cement slurry system and a preparation method thereof. The cementing cement slurry is prepared from the following components in parts by weight: 1.5 to 2.5 parts of swelling agent, 0.5 to 1.5 parts of plastic agent, 1 to 3 parts of filtrate reducer, 5 to 20 parts of latex, 0.1 to 1.5 parts of defoaming agent, 1.0 to 2.5 parts of retarder, 0.2 to 1.5 parts of dispersing agent, 30 to 40 parts of water and 100 parts of cement. The cementing latex cement slurry system can solve the technical problems of ordinary cementing cement slurry such as high brittleness, poor flexibility and poor impermeability.

Description

technical field [0001] The invention relates to the technical field of oil field cementing, and more specifically, to a cementing latex cement slurry system and a preparation method thereof. Background technique [0002] Ordinary cement stone is a highly heterogeneous multiphase system, and its internal structure contains a large number of pores and micro-cracks, especially when cement is coagulated, it is often accompanied by volume shrinkage, which makes the voids increase, resulting in the internal structure of cement stone and its Seepage channels appear between the wellbore and the formation, and the permeability increases accordingly, mainly manifested as brittle and porous channels. After latex is added to the cement slurry system, as the cement hydration proceeds, the latex particles partially adhere to the surface of the cement particles by virtue of the adsorption groups in its molecular structure. Under the action of pressure difference and cement hydration, the ...

Claims

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Application Information

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IPC IPC(8): C04B28/00C09K8/467
CPCC04B28/00C09K8/467C04B2103/50C04B2103/408C04B24/045C04B24/163
Inventor 米远祝罗跃王文杰黄志明
Owner YANGTZE UNIVERSITY
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