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Toughening agent for well cementing slurry

A technology for cementing cement slurry and toughening agent, which is applied in the field of cement toughening agent to achieve the effects of improving toughness and crack resistance, good compatibility and low cost

Active Publication Date: 2016-01-27
古莱特科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Including the above-mentioned documents, there is no record of using chrome leather scraps as cement toughening agent at present, and the present invention proposes for the first time

Method used

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  • Toughening agent for well cementing slurry
  • Toughening agent for well cementing slurry
  • Toughening agent for well cementing slurry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A kind of toughening agent for well cementing slurry, each component and weight are respectively:

[0033]

[0034] According to the API standard, the additives, 800g of grade G oil well cement, and 299g of tap water were thoroughly mixed evenly to obtain the toughening agent cement slurry.

Embodiment 2

[0036] A kind of toughening agent for well cementing slurry, each component and weight are respectively:

[0037]

[0038] According to the API standard, the additives, 800g of grade F oil well cement, and 318.4g of tap water were fully mixed evenly to obtain the toughening agent cement slurry.

Embodiment 3

[0040] A kind of toughening agent for well cementing slurry, each component and weight are respectively:

[0041]

[0042] According to the API standard, the various additives, 800g of grade D oil well cement, and 307.8g of tap water were thoroughly mixed evenly to obtain the toughening agent cement slurry.

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Abstract

The invention relates to a toughening agent for well-cementation cement slurry. The toughening agent comprises chrome shavings with diameters in a range of 0.02-0.05 mm, wherein the chrome shavings account for 0.05-2.0% of cement by weight; and the well-cementation cement slurry also comprises various additives as follows: a fluid loss agent, a dispersing agent, a defoaming agent and a retarding agent. Well-cementation cement prepared with the chrome shaving toughening agent is high in impact resistance, damage caused by perforations to cement rings is small, the problem of 'secondary channeling' is solved fundamentally, and the chrome shaving toughening agent can improve the toughness and the cracking resistance of cement stones and does not affect engineering properties of the cement slurry. According to the chrome shaving toughening agent, the cost is low, and pollution caused by leather production waste to the environment is reduced, so that a new path is provided for recycling of the waste of the leather production industry.

Description

technical field [0001] The invention belongs to a cement toughening agent, in particular to a toughening agent for well cementing slurry. Background technique [0002] At present, most oil fields in China have entered the mid-to-late stage of exploitation. In order to improve the life of oil wells and ensure stable and high production, the quality of cementing has become a prominent problem faced by oil and gas cementing projects. With the continuous development of cementing technology, the cement sheath is required to have good mechanical ductility and mechanical crack resistance to resist the impact of the drill string, as well as the requirements of various damages such as perforation and fracturing. If the mechanical properties of the cement sheath fail to meet the requirements, the phenomenon of "secondary channeling" may occur, and even the sealing effect of the cement sheath will completely fail. Therefore, there is an urgent need for an additive that can improve cem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/467
CPCC04B28/00C09K8/467C04B18/04C04B2111/00724
Inventor 郭丽梅王威
Owner 古莱特科技股份有限公司
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