Spherical metal mineral powder, preparation method and application thereof and cement paste composition

A metal ore and cement slurry technology, which is applied to a cement slurry composition, the preparation of spherical metal ore powder, spherical metal ore powder and its application field, can solve the problem of easy aggregation of metal ore particles, reduce the particle size of metal ore powder, Problems such as high production energy consumption can achieve the effect of improving suspension stability, reducing drill pipe torque and low friction coefficient
CN112276102APending Publication Date: 2021-01-29唐山龙源节能科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
唐山龙源节能科技有限公司
Publication Date
2021-01-29

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Abstract

The invention relates to the technical field of oil field drilling fluid and well cementation, and discloses a preparation method of spherical metal mineral powder. The preparation method comprises the following steps: (1) mixing the metal mineral powder with compressed gas in a venturi mixer to obtain a mixture, and the compressed gas is compressed gas with combustion supporting property; and (2)conveying the mixture into a combustor, spraying the mixture from a nozzle of the combustor, enabling the mixture to be in contact with fuel for combustion, and condensing to obtain the spherical metal mineral powder. According to the method, bonding and aggregation among metal ore particles can be prevented in the melting process, the particle size of the metal ore powder is remarkably reduced,the spheroidization rate and the spheroidization degree of the metal ore powder are improved, and the prepared spherical metal ore powder can be used as a weighting agent to be applied to the fields of cement paste, spacer fluid, drilling fluid and the like.
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Description

technical field

[0001] The invention relates to the technical field of oilfield drilling fluid and well cementing, in particular to a preparation method of spherical metal ore powder, the spherical metal ore powder prepared by the method and its application, and a cement slurry composition. Background technique

[0002] In recent years, the exploration and development of oilfields have developed towards the ocean, complex formations, deep wells, medium-deep wells and ultra-deep wells. Complex formations are often drilled, such as high-pressure gas layers or high-pressure saline layers, and the formation pressure has also increased significantly. And the cementing process brings many challenges and problems. During the drilling operation, if the formation pressure cannot be balanced, problems such as drilling difficulty, diameter shrinkage collapse, blowout and kick will occur; The phenomenon of gas and water channeling has seriously affected the quality of the cementing pro...

Claims

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