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Oil well cement coagulation-accelerating early strength agent and preparation method thereof

A technology for accelerating coagulation and early strength, and oil well cement, which is applied in the directions of chemical instruments and methods, drilling compositions, etc., to shorten the thickening time and improve the early strength.

Inactive Publication Date: 2016-02-24
CHENGDU CHUANFENG CHEM ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problem of defects in the separate use of the inorganic salt and organic salt coagulant accelerators in the prior art, and provides an oil well cement coagulation accelerator, which is convenient to use in one dose And the purpose of making full use of the synergistic effects of inorganic salts and organic salts can make the cement slurry solidify quickly under low temperature conditions

Method used

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  • Oil well cement coagulation-accelerating early strength agent and preparation method thereof
  • Oil well cement coagulation-accelerating early strength agent and preparation method thereof
  • Oil well cement coagulation-accelerating early strength agent and preparation method thereof

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Effect test

Embodiment 1

[0032] A coagulation accelerator and early strength agent for oil well cement, comprising the following raw materials in parts by weight:

[0033] 10 parts of gypsum powder

[0034] 10 parts quicklime

[0035] 10 parts of aluminum salt.

Embodiment 2

[0037] A coagulation accelerator and early strength agent for oil well cement, comprising the following raw materials in parts by weight:

[0038] 50 parts of gypsum powder

[0039] 40 parts quicklime

[0040] 50 parts of aluminum salt.

Embodiment 3

[0042] A coagulation accelerator and early strength agent for oil well cement, comprising the following raw materials in parts by weight:

[0043] 30 parts of gypsum powder

[0044] 25 parts quicklime

[0045] 30 parts of aluminum salt.

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Abstract

The invention relates to an oil well cement coagulation-accelerating early strength agent and a preparation method thereof, and belongs to the technical field of oil well cement additives. The early strength agent is prepared from, by weight, 10-50 parts of gypsum powder, 10-40 parts of quick lime and 10-50 parts of aluminum salt. The purposes that the agent is quite convenient to use, and the synergistic interaction of organic salt and inorganic salt is sufficiently utilized can be achieved, and cement paste can rapidly set at low temperature.

Description

technical field [0001] The invention relates to a cement early-strength agent and a preparation method thereof. More specifically, the invention relates to an oil well cement coagulation accelerator early-strength agent and a preparation method thereof, belonging to the technical field of oil well cement admixtures. Background technique [0002] In the case of shallow casing entry in the surface layer and low operating temperature in winter, it is extremely unfavorable for the solidification of cement slurry. The usual method is to increase the early strength of cement slurry by adding inorganic salts such as calcium chloride, but it cannot meet the requirements of extremely short thickening time for cement slurry during high-speed drilling. Also, if the amount of inorganic salt added is too large, its performance will often be reversed, which will bring unpredictable risks to cementing. [0003] The State Intellectual Property Office published an invention with the publica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/467
CPCC09K8/467
Inventor 周先成赖杰韩涛沈思英易音辜慧兰
Owner CHENGDU CHUANFENG CHEM ENG CO LTD
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