A kind of preparation method of polymer fluid loss reducing agent for sulphoaluminate cement

A technology of sulphoaluminate cement and water loss reducing agent, which is applied in the field of oil and gas well cementing, can solve the problems of construction slurry mixing risk, difficult density control, poor stability of cement slurry, etc., and achieve effective control of water loss and good stability , the effect of easy thickening time

Active Publication Date: 2019-12-06
卫辉市化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since sulphoaluminate cement has a fast hydration rate even at low temperature, in order to ensure the safety of cementing construction and improve the quality of cementing, it is necessary to strictly control the thickening time and water loss of sulphoaluminate cement slurry, but the commonly used Oil well cement (Portland cement) fluid loss reducer is very thin in this system, which poses a certain risk to the construction slurry, the stability of the cement slurry is very poor, and the density is not easy to control. Therefore, it is necessary to develop a special compound for sulfur aluminum Water loss reducer for salt cement

Method used

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  • A kind of preparation method of polymer fluid loss reducing agent for sulphoaluminate cement
  • A kind of preparation method of polymer fluid loss reducing agent for sulphoaluminate cement

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Embodiment 1

[0025] A preparation method of a polymer fluid loss reducer for sulphoaluminate cement, comprising the steps of:

[0026] (1) Modified polymerization of nanomaterials to obtain modified nanomaterials;

[0027] The nanomaterial is a nano-silica solution, and the modified polymerization includes the following steps: (1-1) 2.4 kg of a silane coupling agent is added dropwise to 477.6 kg of a nano-silica solution, and in the nano-silica solution, the nano-silica The mass fraction of silicon oxide is 29wt%, and the amount of silane coupling agent added to the nano-silica solution is 0.5-1wt% of the mass of the nano-silica solution, and the silane coupling agent / silica sol mixed system is formed after stirring and mixing for 30 minutes After continuing to stir, the initial silane coupling agent modified silica sol is obtained; (1-2) the initial silane coupling agent modified silica sol is adjusted to pH 10 with sodium hydroxide solution, and the concentration of sodium hydroxide solu...

Embodiment 2

[0034] A preparation method of a polymer fluid loss reducer for sulphoaluminate cement, comprising the steps of:

[0035] (1) Modified polymerization of nanomaterials to obtain modified nanomaterials;

[0036] The nanomaterial is a nano-silica solution, and the modified polymerization includes the following steps: (1-1) 2.4 kg of a silane coupling agent is added dropwise to 477.6 kg of a nano-silica solution, and in the nano-silica solution, the nano-silica The mass fraction of silicon oxide is 30wt%, and the amount of silane coupling agent added to the nano-silica solution is 0.5-1wt% of the mass of the nano-silica solution, and the silane coupling agent / silica sol mixed system is formed after stirring and mixing for 30 minutes After continuing to stir, the initial silane coupling agent modified silica sol is obtained; (1-2) the initial silane coupling agent modified silica sol is adjusted to pH 10 with sodium hydroxide solution, and the concentration of sodium hydroxide solu...

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Abstract

The invention discloses a preparation method of a polymer fluid loss agent for sulphoaluminate cement. The preparation method comprises the steps as follows: (1) performing modified polymerization on a nano-material to obtain a modified nano-material; (2) polymerizing the modified nano-material and a monomer aqueous solution. The prepared polymer fluid loss agent for sulphoaluminate cement has good stability in sulphoaluminate cement slurry, and can effectively control the water loss of the cement slurry, and the thickening time of the cement slurry is easy to adjust.

Description

technical field [0001] The invention relates to the field of oil and gas well cementing, in particular to a preparation method of a polymer fluid loss reducer for sulphoaluminate cement. Background technique [0002] The performance of Portland cement commonly used in oil and gas well cementing can meet the needs of general cementing construction, but due to its low-temperature hydration speed and slow early strength development, it cannot meet the requirements of shallow surface cementing, heavy oil heat, etc. Requirements for the use of special oil and gas cementing such as mining. In recent years, my country has made great progress in the research and production of sulphoaluminate cement. It has outstanding advantages such as early strength, high strength, frost resistance, impermeability, corrosion resistance, and low alkali, showing a very optimistic development prospect. The sulphoaluminate cement slurry system is also gradually recognized by the oil and gas well ceme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F292/00C08F220/56C08F220/58C08F222/02C08F226/10C08F220/06C04B24/16
CPCC04B24/163C04B2103/46C08F292/00C08F220/56
Inventor 赵元伟王爱民梁艳丽靳建忠卢甲晗耿强李新芬赵俊涛郭娟穆莺
Owner 卫辉市化工有限公司
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