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High-density spherical particle composite weighting agent for well drilling or well cementation and preparing method thereof

A technology of spherical particles and weighting agent, applied in wellbore/well components, drilling compositions, chemical instruments and methods, etc., can solve the problems of increased drilling difficulty, poor drilling fluid rheology, etc., and achieve good fluidity , The effect of good acid capacity and low bleeding rate

Inactive Publication Date: 2020-09-11
重庆钜泾化工科技有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional drilling fluids are limited in solving these problems, especially rheological problems
The usual treatment method is to use non-water-soluble inert weighting agent. This method can make the density of the drilling fluid meet the requirements (it can meet the requirement of a density above 2.5g / cm3), but at the same time, it will cause the drilling fluid to have too high a solid phase content and plasticity. Viscosity (PV) increases obviously. If the content of soil increases slightly, its dynamic and static shear force (YP, G) will increase greatly, resulting in poor rheological properties of drilling fluid and increased drilling difficulty.

Method used

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  • High-density spherical particle composite weighting agent for well drilling or well cementation and preparing method thereof
  • High-density spherical particle composite weighting agent for well drilling or well cementation and preparing method thereof
  • High-density spherical particle composite weighting agent for well drilling or well cementation and preparing method thereof

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with specific embodiments.

[0026] Prepare spherical particle composite weighting agents as follows:

[0027] Selection of raw materials: use metal or alloy as raw material, and analyze and determine the composition of the raw material to obtain the content of Fe, Zn and Cu; the raw material is one or more of metal alloy processing scraps, metal or alloy materials on waste equipment species; determine the composition of composite weighting agents of different densities (when the density is 7.5-7.8g / cm 3 When the density reaches 7.8~8.0g / cm, its Cu and Zn can be free. 3 In order to ensure the product density, the composition of the weighting agent must be designed according to the density requirements of the produced product, and the product in the production process must be sampled to test the product density to determine The content of the components,) in the production process, the production is c...

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Abstract

The invention discloses a high-density spherical particle composite weighting agent for well drilling or well cementation. The density of the weighting agent is 7.5-8.0 g / cm <3>, and the particle sizeof the weighting agent is 80-425 meshes. The invention further discloses a preparation method of the composite weighting agent, by means of the preparation method, the weighting agent can be large inspecific gravity and controllable in particle size, the weighting agent has the particle morphology better tending to be of a zero-dimensional spherical structure, the weighting agent is good in flowability, good in acid solubility and recyclable when being added into drilling fluid, and when being used in well cementation liquid, the weighting agent has the effects of favorable dispersion and suspension stability and low bleeding rate.

Description

technical field [0001] The invention relates to the technical field of weighting agents used in drilling fluids in oil drilling, in particular to a high-density spherical particle composite weighting agent for oil and natural gas drilling or well cementing and a preparation method thereof. Background technique [0002] At present, the density of high-density weighting agents used in drilling operations is generally 6.5-7.3 (g / cm3) (B / T5005-2001), and the materials used are mainly iron ore powder and reduced iron powder. Agents are products prepared by crushing and grinding. However, the structure of this product is irregular and the gradation performance is poor, resulting in a low specific surface of the high-composite weighting agent. When preparing drilling and cementing fluids, it is difficult to design compatibility and cannot meet the operating requirements of drilling and cementing fluids. [0003] With the continuous change of drilling and cementing conditions, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B21/00E21B33/13C09K8/03C09K8/50
CPCC09K8/032C09K8/50E21B21/00E21B33/13
Inventor 刘朝辉刘硕琼靳建洲于永金刘志成杨宏波齐奉忠刘慧婷刘子帅张弛张华徐明夏修建
Owner 重庆钜泾化工科技有限公司
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