Modified oil-well cement, preparing method thereof and production line thereof

An oil well cement and modification technology, applied in the field of special cement, can solve the problems of single mineral admixture, unsatisfactory product performance, and insufficient material cost, and achieve the effect of reducing construction risk, quantity and energy consumption.

Inactive Publication Date: 2012-06-13
JIAHUA SPECIAL CEMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] At present, some manufacturers add mineral admixtures to oil well cement, for example: use quartz sand, limestone, etc. to prepare high temperature oil well cement; some also mix zeolite and alunite; or mix pozzolanic materials to produce oil well cement that changes performance However, in general, the added mineral admixture is relatively simple, the saving of material cost is not significant enough, and the product performance is not satisfactory

Method used

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  • Modified oil-well cement, preparing method thereof and production line thereof
  • Modified oil-well cement, preparing method thereof and production line thereof
  • Modified oil-well cement, preparing method thereof and production line thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0092] Embodiment 1——The first mineral additive is granulated blast furnace slag, and the second mineral additive is one of limestone, basalt, microsilica fume, quartz sand, magnesium slag, phosphorus slag, vanadium titanium slag or steel slag, wherein The mass percentage content of each component is specifically:

[0093] Cement clinker is 20% to 80%;

[0094] Gypsum is 2% to 10%;

[0095] Granulated blast furnace slag is 0.1% to 40%, preferably 2% to 18%, more preferably 5% to 15%, most preferably 8% to 12%;

[0096] Limestone, basalt, silica fume, quartz sand, magnesium slag, phosphorus slag, vanadium-titanium slag or steel slag is 0.1% to 40%, preferably 2% to 18%, more preferably 5% to 15%, most preferably 8% % ~ 12%.

[0097] For example, the preferred components and proportions of a modified G-grade oil well cement are:

[0098] Cement clinker is 75±5%;

[0099] Gypsum is 5±1%;

[0100] The first mineral additive is granulated blast furnace slag with a content of ...

Embodiment 2

[0103] Embodiment 2——The first mineral additive is magnesium slag, and the second mineral additive is one of limestone, basalt, microsilica fume, fly ash, quartz sand, phosphorus slag, vanadium titanium slag or steel slag, wherein each The mass percentage content of component is specifically:

[0104] Cement clinker is 20% to 80%;

[0105] Gypsum is 2% to 10%;

[0106] Magnesium slag is 0.1%-40%, preferably 2%-18%, more preferably 5%-15%, most preferably 8%-12%;

[0107] Limestone, basalt, silica fume, fly ash, quartz sand, phosphorus slag, vanadium-titanium slag or steel slag is 0.1% to 40%, preferably 2% to 18%, more preferably 5% to 15%, most preferably 8% to 12%.

Embodiment 3

[0108] Embodiment 3——the first mineral additive is phosphorus slag, and the second mineral additive is one of limestone, basalt, microsilica fume, fly ash, quartz sand, vanadium-titanium slag or steel slag, wherein each component The mass percentage content is specifically:

[0109] Cement clinker is 20% to 80%;

[0110] Gypsum is 2% to 10%;

[0111] Phosphorus slag is 0.1%-40%, preferably 2%-18%, more preferably 5%-15%, most preferably 8%-12%;

[0112] Limestone, basalt, silica fume, fly ash, quartz sand, vanadium-titanium slag or steel slag is 0.1% to 40%, preferably 2% to 18%, more preferably 5% to 15%, most preferably 8% to 12%.

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Abstract

The invention discloses a kind of modified oil-well cement, a preparing method thereof and a production line thereof. The modified oil-well cement comprises components of cement clinker, gypsum and at least two mineral additives, and by mass ratio, the cement clinker occupies 20%-80%, the gypsum occupies 2%-10%, and all the mineral additives respectively occupy 0.1%-40%. The preparing method includes metering, dosing and grinding all components to form cement in a preset granular level, or independently grinding all components or metering and dosing all components in proportion and grinding all components in groups, and then metering and dosing all components in proportion and mixing all components evenly to obtain the cement. The production line comprises a metering and dosing system and a cement grinder, wherein the metering and dosing system meters, doses and mixes all components in proportion, and the cement grinder grinds mixed materials to cement in the preset granular level. Or the production line comprises a grinding system and a mixing stirrer, wherein the grinding system grinds all components independently or meters and doses all components in proportion and grinds all components in groups to be in the preset granular level, and the mixing stirrer evenly mixes powder materials of all components to be cement. The modified oil-well cement obtained through the preparing method and the production line properly reduces production cost on the basis of meeting the product performance index.

Description

technical field [0001] The invention relates to the technical field of special cement, in particular to a modified oil well cement and its preparation method and production line. Background technique [0002] Oil well cement, also known as blockage cement or cementing cement, belongs to special cement, which is Portland cement clinker mainly composed of hydraulic calcium silicate, adding appropriate amount of gypsum and auxiliary Abrasives are finely ground. [0003] Oil well cement has suitable density, setting time, and low consistency, and the ready-mixed oil well concrete prepared with it has good subsidence resistance and pumpability. When it is injected into the predetermined (temperature, pressure) well section, it can quickly solidify and harden and produce a certain mechanical strength. At the same time, the concrete has good impermeability, stability and corrosion resistance after curing. [0004] The physical performance requirements of oil well cement include: ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00
Inventor 陈东许毅刚
Owner JIAHUA SPECIAL CEMENT
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