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Oil well cement dispersing agent as well as preparation method and application thereof

A technology for oil well cement and dispersant, which is applied to the field of oil well cement dispersant and its preparation and application, can solve the problems of low dispersant efficiency, polluted polycarboxylate dispersant, and low temperature resistance, so as to improve flow performance and avoid production Accidents, the effect of improving dispersion efficiency

Active Publication Date: 2022-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the above-mentioned problems existing in the prior art, the present invention provides a new oil well cement dispersant, which has high temperature resistance and excellent dispersion ability, and has excellent performance when used in conjunction with other oil well cement additives under the condition of not more than 150°C. Excellent dispersing ability, and the raw materials, production and use process are environmentally friendly, overcoming the shortcomings of low efficiency, heavy pollution and low temperature resistance of polycarboxylic acid dispersants

Method used

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  • Oil well cement dispersing agent as well as preparation method and application thereof
  • Oil well cement dispersing agent as well as preparation method and application thereof
  • Oil well cement dispersing agent as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] 100 g of TPEG 2400 and 150 g of deionized water were added to a round bottom flask, stirred and heated to 70°C. Add 1.5g of hydrogen peroxide into 15g of deionized water, stir well and add to the reaction kettle. 0.7g ascorbic acid and 1g of 3-mercaptopropionic acid were added into 17g deionized water to make a mixed aqueous solution of reducing agent and chain transfer agent; 40g acrylic acid (AA) was added to 40g deionized water to make an aqueous solution of acrylic acid; The aqueous solution of acrylic acid solution, 0.5g of KH-570 and acrylic acid solution were added dropwise into the round bottom flask at the same time, and the addition of the aqueous solution of acrylic acid and KH-570 was controlled by a peristaltic pump in 4 hours, and the mixed solution of reducing agent and chain transfer agent was dropped in 4.5 hours. Finished adding. After all the materials were added dropwise, the heat preservation and stirring were continued for 0.5 hour to prepare samp...

Embodiment 2

[0076]Add 100 g of methallyl alcohol polyoxyethylene ether and 160 g of deionized water into a round bottom flask, stir and heat to 50°C. Add 0.5 g of hydrogen peroxide into 5 g of deionized water, stir well and add to the reaction kettle. The 3-mercaptopropionic acid of 0.25g ascorbic acid and 0.2g is added into 5.5g deionized water to make reducing agent and chain transfer agent mixed aqueous solution; 4g itaconic acid (IA) is added into 4g deionized water to make itaconic acid aqueous solution; The reducing agent and chain transfer agent mixed aqueous solution, 8.5g of KH-550, and itaconic acid aqueous solution were added dropwise to the round bottom flask at the same time, and the itaconic acid aqueous solution and KH-550 were controlled by a peristaltic pump to be added dropwise in 2 hours. The aqueous solution mixed with the chain transfer agent was added dropwise in 2.5 hours. After all the materials were added dropwise, the heat preservation and stirring were continue...

Embodiment 3

[0078] A round bottom flask was charged with 100 g of HPEG 4000 and 150 g of deionized water, stirred and heated to 65°C. Add 0.9 g of hydrogen peroxide into 4.5 g of deionized water, stir well and add to the reaction kettle. The 3-mercaptopropionic acid of 0.35g ascorbic acid and 0.8g is added into 11.5g deionized water and made reductive agent and chain transfer agent mixed aqueous solution; 24g acrylic acid (AA) is added into 24g deionized water and made acrylic acid aqueous solution; Reductive agent and The chain transfer agent mixed aqueous solution, 5g of KH-570, and acrylic acid aqueous solution were dropped into the round bottom flask at the same time, and the acrylic acid aqueous solution and KH-570 were added dropwise through the peristaltic pump in 3 hours, and the reducing agent and chain transfer agent mixed aqueous solution was dropped in 3.5 hours. Finished adding. After all the materials were added dropwise, the heat preservation and stirring were continued fo...

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Abstract

The invention discloses an oil well cement dispersing agent as well as a preparation method and application thereof. The oil well cement dispersing agent is prepared from the following raw materials: an unsaturated polyether monomer, unsaturated acid or salt or anhydride thereof, a silane coupling agent, an oxidizing agent, a reducing agent and a chain transfer agent, and the molar ratio of the unsaturated polyether monomer to the silane coupling agent is 1: (0.002-0.04). The dispersant disclosed by the invention has high temperature resistance and excellent dispersing capacity, has excellent dispersing capacity when being matched with other oil well cement additives for use under the condition of not more than 150 DEG C, is environment-friendly in raw material, production and use processes, and overcomes the defects that a sulfonated aldehyde ketone polycondensate dispersant is low in efficiency and heavy in pollution and a polycarboxylic acid dispersant is low in temperature resistance.

Description

technical field [0001] The invention relates to an oil well cement dispersant and its preparation method and application. Background technique [0002] The cementing operation needs to pump cement slurry in the annular space between the casing and the wellbore, and the pumped cement slurry is required to have good flow properties. However, in actual construction, especially in the cementing construction of high temperature, high pressure, and complex wells , in order to ensure the cementing requirements, it is necessary to add a variety of admixtures or admixtures to the cement slurry, such as retarders, fluid loss reducers, weighting agents, latex materials, etc., which often lead to poor fluidity of the slurry and difficulty in pumping deliver. Therefore, it is often necessary to add a dispersant to the cement slurry, so that the viscosity of the cement slurry decreases under the condition of a fixed water-cement ratio, the fluidity increases, and the turbulent flow grout...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/32C08F283/06C08F220/06C08F230/08C08F222/02C08F4/40C08F2/38C04B103/40
CPCC04B24/32C08F283/065C08F4/40C08F2/38C04B2103/408C08F220/06C08F230/085C08F222/02C04B2103/40C08F2/10C04B24/42C04B24/2694C04B24/165C04B2103/006C08L51/08C08F290/062C08F230/08C08F290/142C09K8/467
Inventor 苗霞周仕明孔祥明汪晓静
Owner CHINA PETROLEUM & CHEM CORP
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