Anti-blowby cement slurry

A cement slurry and cement technology, applied in the field of cement slurry, can solve the problems of liquid latex anti-channeling performance damage, reduce the brittleness coefficient and elastic modulus of cement stone, etc., and achieve the reduction of elastic modulus, brittleness coefficient and cost. Effect

Inactive Publication Date: 2012-06-13
JIAHUA SPECIAL CEMENT
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Problems solved by technology

It can solve the technical problem that the anti-channeling performance of liquid latex is destroyed by the existing high-speed mixing equipment, and reduces the brittleness coefficient and elastic modulus of cement stone, which can effectively improve the quality of cementing, prevent fluid channel...

Method used

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  • Anti-blowby cement slurry

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Experimental program
Comparison scheme
Effect test

Embodiment l

[0042] According to the water-cement ratio of 0.44, polyvinyl acetate latex powder 2.5%, sulfonated acetone-formaldehyde condensate 0.3%, acrylamide copolymer fluid loss reducer 1.2%, phosphate defoamer 1%, sodium gluconate 0.05%, The raw materials of 600g of cement were mixed together, the stability of the latex cement slurry was observed, and the relevant properties of the cement slurry were measured. The results are shown in Table 1.

Embodiment 2

[0044] According to the water-cement ratio of 0.44, polystyrene-butyl acrylate latex powder 2.5%, sulfonated acetone-formaldehyde condensate 0.3%, acrylamide copolymer fluid loss reducer 1.2%, silicone defoamer 1%, gluconic acid Sodium 0.05%, the raw material of cement 600g is mixed together, observe the stability of latex cement slurry, and measure the relevant performance of cement slurry, the result is shown in Table 1. .

Embodiment 3

[0046] According to the water-cement ratio of 0.44, terpolymerized polyvinyl acetate, polystyrene-butyl acrylate, polyacrylate latex powder 2.5%, sulfonated acetone-formaldehyde condensate 0.3%, acrylamide copolymer fluid loss reducer 1.2%, Organosilicon defoamer 1%, sodium gluconate 0.05%, and cement 600g were mixed together to observe the stability of the latex cement slurry and determine the relevant properties of the cement slurry. The results are shown in Table 1.

[0047] Table 1:

[0048]

[0049]Requirements: The initial consistency is less than 20Bc, and the API water loss is less than 30ml (for anti-channeling cement slurry).

[0050] experimental method

[0051] (1) After stirring the slurry, let it stand at room temperature for 5 minutes to observe the condition of the slurry.

[0052] (2) After the slurry is stirred, pass through a 12-95-1 atmospheric pressure thickener, maintain the slurry for 20 minutes under the experimental conditions of 60°C×0.1...

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Abstract

The invention relates to anti-blowby cement slurry, and relates to the technical field of cement slurry. The anti-blowby cement slurry consists of the following components in percentage by mass: 90 to 95 percent of cement matrix, 1 to 8 percent of polymer rubber latex powder, 0.1 to 0.7 percent of drag reducer, 0.3 to 3.5 percent of filtration-reducing agent, 0.1 to 1.5 percent of cement defoaming agent and 0.05 to 3.5 percent of thickening time control agent. The anti-blowby cement slurry is a single-component system; and due to the adoption of the rubber latex powder, the brittleness coefficients and elastic modulus of cement are reduced, the well cementation quality can be improved effectively, the fluid channeling can be prevented, and the problem generated when liquid polymer rubber latex is used is solved; and the anti-blowby cement slurry is stirred only by adding water at a construction site, and is convenient to prepare, store, transport and use, so the construction process is simplified, the cost is reduced, and the anti-blowby cement slurry has a bright application prospect.

Description

[0001] technical field [0002] The invention relates to the technical field of cement slurry, in particular to an improved anti-channeling cement slurry, which is mainly used in oil field cementing projects, dam projects and tunnel projects for preventing gas channeling. Background technique [0003] Fluid channeling is a common problem encountered in engineering construction, including gas channeling and water channeling. Especially in the construction of deep wells, ultra-deep wells, gas wells and tunnels in oil fields, due to the high formation pressure and complex design structures, fluid channeling is more likely to occur under high pressure, which reduces the bond strength of cement stone and affects the quality of the project. [0004] The foam cement slurry system, expansion cement slurry system and polymer latex cement slurry system developed abroad have been applied in cementing and tunnel engineering, especially the polymer latex cement slurry system has been ca...

Claims

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Application Information

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IPC IPC(8): C09K8/493
Inventor 黎茜曾雪玲阳运霞
Owner JIAHUA SPECIAL CEMENT
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