Modified and toughened material for well cementing

Abstract

The invention discloses a modified and toughened material for well cementing, which relates to the technical field of well cementing materials. The modified and toughened material for cementing of the present invention comprises the following raw materials by mass percentage: 70-90% of fiber material, 5-10% of organic dispersion aid and 5-20% of inorganic dispersion aid; The dispersant is put into the mixing equipment for mixing; the mixed prefabricated fiber material is put into the ball mill, and ground for 20-30min, and the ground prefabricated fiber material and the inorganic dispersant are put into the mixing equipment for mixing, After the mixing is completed, the modified and toughened material is obtained. The invention can disperse fibers in gel materials such as cement materials, reduce agglomeration, increase the proportion of fibers used in cement-based materials, improve the compressive strength, crack resistance, toughness, durability and reduce shrinkage of cement slurry. Realize the pumpability of fiber cement during downhole operations, reduce cement stone cracks, prevent gas channeling and water channeling, and improve the safety of cementing operations.

Description

technical field [0001] The invention relates to the technical field of well cementing materials, in particular to a modified and toughened material for well cementing. Background technique [0002] In order to improve the performance of cement, fibers are often used in various cement-based materials, including mortar, concrete, and fiber cement products. Although fibers with random sizes can improve some mechanical properties of concrete, due to fiber "balling" or The possibility of flocculation and non-uniform dispersion, the requirements for its mixing and dispersion are usually higher. [0003] In the cementing industry, long fibers are not easy to pump, and the difficulty of mixing and dispersing fibers limits the amount of fibers used. In cementing cement, the actual amount of fibers added to the mud is less than 2%. Fibers used in cementing materials If the length is not more than 10mm, the performance of the fiber in cement products such as mortar and concrete cannot...

AI Technical Summary

Problems solved by technology

[0003] In the cementing industry, long fibers are not easy to pump, and the difficulty of mixing and dispersing fibers limits the amount of fibers used. In cementing cement, the actual amount of fibers added to the mud is less than 2%. Fibers used in cementing materials The length does not exceed 10mm, and the performance of the fiber in cement products such as mortar and concrete cannot be better exerted

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