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A kind of high-strength low-density cement slurry

A low-density, cement slurry technology, applied in the field of oil well drilling engineering, can solve the problems of land occupation, waste of resources and energy, pollution of the environment, etc., and achieve the effects of cost reduction, high stability, and good comprehensive performance

Active Publication Date: 2018-05-29
中科华星新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large amount of waste glass is discarded, which not only occupies land, but also pollutes the environment, and also causes a lot of waste of resources and energy

Method used

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  • A kind of high-strength low-density cement slurry

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Mix 100 parts of G grade oil well portland cement, 20 parts of fine cement, 30 parts of hollow glass microspheres, 15 parts of waste glass powder, 15 parts of micro silicon, 1 part of reinforcing agent, 3 parts of fluid loss reducer, and 138 parts of water Stir evenly until it becomes a slurry, and test various performance indicators;

Embodiment 2

[0023] Mix 100 parts of G grade oil well portland cement, 30 parts of fine cement, 25 parts of hollow glass microspheres, 10 parts of waste glass powder, 15 parts of micro silicon, 3 parts of fluid loss reducer, 0.5 parts of dispersant, and 120 parts of water Stir evenly until it becomes a slurry, and test various performance indicators;

Embodiment 3

[0025] 100 parts of G-grade oil well portland cement, 40 parts of fine cement, 22 parts of hollow glass microspheres, 6 parts of waste glass powder, 12 parts of micro silicon, 1 part of reinforcing agent, 2 parts of fluid loss reducer, and 0.5 parts of dispersant , 110 parts of water were mixed and stirred evenly until it was in the form of a slurry, and various performance indicators were tested;

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Abstract

The invention belongs to the field of oil well drilling engineering, and particularly relates to a high-strength low-density cement paste. The high-strength low-density cement paste comprises the following components in parts by weight: 100 parts of oil well cement, 20-50 parts of fine cement, 20-30 parts of hollow glass microsphere, 5-15 parts of waste glass powder, 10-15 parts of silicon micropowder, 1-5 parts of composite additive and 100-138 parts of water. The waste glass powder is prepared by pulverizing and grinding glass cullet, the maximum particle size is at most 100 mu m, the particle size of more than 90% of waste glass powder is at most 63 mu m, the particle size of more than 50% of waste glass powder is at most 38 mu m, and the particle size of more than 10% of waste glass powder is at most 10 mu m. The cement paste, which is prepared by using the compounding and close packing principles in combination of perfect size distribution, has the advantages of high strength, low density and stable performance, effectively utilizes the waste glass, saves the resources, lowers the cost, and has higher strength and comprehensive properties.

Description

technical field [0001] The invention belongs to the field of oil well drilling engineering, in particular to a high-strength and low-density cement slurry for oil well cementing. Background technique [0002] With the continuous development of my country's oil exploration and development technology, there are more and more studies on low-density cement slurry systems for cementing. At present, the cement slurry used for cementing in my country is mostly made of oil well cement as the cementitious material, floating beads or hollow glass microspheres as the lightening agent, micro silicon as the filler, and additives such as fluid loss reducers. Floating beads have thin walls, low strength, and relatively high density. As a lightening agent, they are not as effective as hollow glass beads, and their output is getting less and less. At present, there are many domestic manufacturers of hollow glass beads, and the market is unstable. The unstable quality of hollow glass microsp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/473
CPCC09K8/473
Inventor 钟舜陆泽鹏
Owner 中科华星新材料有限公司
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