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

Pending Publication Date: 2021-01-29
唐山龙源节能科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to provide a kind of spherical metal ore powder in order to overcome the existing problems in the prior art that the particle size of the spherical weighting material is large and the metal ore particles are easy to aggregate during the preparation process, and the process is complicated and the production energy consumption is high. The preparation method, the spherical metal ore powder prepared by the method and its application, a cement slurry, the method can prevent the bonding and aggregation between metal ore particles during the melting process, and significantly reduce the particle size of the metal ore powder, And the spheroidization rate and spheroidization degree of the metal ore powder are improved, and the spherical metal ore powder prepared can be used as a weighting agent in the fields of cement slurry, spacer fluid and drilling fluid.

Method used

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

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preparation example Construction

[0028] The first aspect of the present invention provides a kind of preparation method of spherical metal ore powder, wherein, comprise the following steps:

[0029] (1) In a Venturi mixer, the metal ore powder is mixed with compressed gas to obtain a mixture;

[0030] (2) Transfer the mixture into the burner, spray it out from the nozzle of the burner, contact with the fuel for combustion, and obtain spherical metal ore powder after condensation.

[0031] The inventors of the present invention have found that the D10 of the metal ore powder is 1-4 μm, the D50 is 2-6 μm, and the D90 is 6-10 μm. In particular, the D10 of the metal ore powder is 2-3 μm, the D50 is 3-5 μm, and the D90 When the thickness is 6-10 μm, the comprehensive effect is the most excellent.

[0032] According to the present invention, the particle size of the metal ore powder can be controlled by conventional methods. For example, grinding and / or classifying. The metal ore powder can be prepared from meta...

Embodiment 1

[0091] (1) Grinding and grading the hematite to obtain D10 is 3 μm, D50 is 5 μm, and D90 is 8 μm hematite powder, which is observed under a microscope (100 times magnification), and the result is as follows figure 1 shown;

[0092] (2) In the Venturi mixer, the hematite powder and compressed air are mixed to obtain a mixture; the mass flow ratio of the hematite powder and compressed air is 8g / L, and the pressure of the compressed air is 0.2MPa , the flow velocity is 8m / s, and the compressed air flows in a pulsed manner;

[0093] (3) The mixed material is transferred to the burner through the discharge section, and ejected from the nozzle of the burner, and burns in contact with natural gas (relative to the hematite powder per gram, the consumption of natural gas is 0.4g) , Condensation to obtain spherical metal ore powder, the velocity of the mixed material ejected from the burner nozzle is 6m / s, the flame temperature is 2000°C, and the flame is at an angle of 15°. Spherical...

Embodiment 2

[0097] (1) Grinding and classifying the hematite to obtain hematite powder with a D50 of 10 μm;

[0098] (2) In the Venturi mixer, the hematite powder and compressed air are mixed to obtain a mixture; the mass flow ratio of the hematite powder and compressed air is 14g / L, and the pressure of the compressed air is 0.2MPa , the flow velocity is 15m / s, and the compressed air flows in turbulent flow;

[0099] (3) The mixture is transferred from the burner, and ejected from the nozzle of the burner, with a volume ratio of 2.2:1 of natural gas and oxygen (with respect to every gram of hematite powder, natural gas The dosage is 0.6g) to contact, burn and condense to obtain spherical metal ore powder. The velocity of the mixture ejected from the nozzle is 10m / s, the flame temperature is 1600°C, and the flame is at an angle of 30°. Spherical hematite powder A2 was obtained.

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/08B22F1/00C09K8/03C09K8/42C09K8/48C04B28/00C04B14/02C04B14/36
CPCB22F9/082C09K8/032C09K8/48C09K8/424C04B28/00C04B14/308C04B14/02B22F2009/0832C04B2201/50B22F1/065C04B2103/46C04B2103/22C04B2103/408C04B2103/50C04B22/002
Inventor 马杰李旭芬
Owner 唐山龙源节能科技有限公司
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