Drilling fluid inhibitor and preparation method thereof

An inhibitor and drilling fluid technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of limited application, high cost, poor compatibility, etc., to inhibit shale dispersion and prevent wellbore collapse , The effect of simple process operation and environmental protection

Active Publication Date: 2012-11-07
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, the inhibitors commonly used in drilling fluids mainly include asphalt, inorganic salts, synthetic polymers, etc. These inhibitors have some shortcomings, such as asphalt is not conducive to environmental protection; silicate will make the system rheological Difficult to control; the alkyl glycosides develo

Method used

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  • Drilling fluid inhibitor and preparation method thereof
  • Drilling fluid inhibitor and preparation method thereof
  • Drilling fluid inhibitor and preparation method thereof

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Embodiment 1

[0024] In a 500 mL four-neck flask equipped with a thermometer, a condenser, and a stirrer, 0.20 mol of epichlorohydrin, 2.40 mol of distilled water and 0.004 mol of p-toluenesulfonic acid were added. React at normal pressure at 60°C for 3 hours to obtain a colorless and transparent aqueous solution of 3-chloro-1,2-propanediol; cool down to room temperature, add 0.40 mol of methyl glucoside, and react at normal pressure at 80°C for 0.5h , to obtain a colorless and transparent viscous liquid of chlorohydrin glucoside; cool down to room temperature, neutralize with saturated aqueous sodium hydroxide solution to pH ≈ 7; then add 0.04mol of 33.3% dimethylamine to the bottom of the chlorohydrin glycoside aqueous solution , and then add 0.0009 mol of cross-linking agent ethylenediamine, and react for 3 hours at a temperature of 40° C. to obtain a light yellow or orange transparent methyl glycoside polyamine aqueous solution. Concentrating, drying and pulverizing can obtain the produ...

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Abstract

The invention relates to drilling fluid inhibitor and a preparation method thereof and belongs to the technical field of treating agents for oilfield chemical drilling fluids. The preparation method includes the steps of firstly, allowing epichlorohydrin, water and catalyst to react at 60-100 DEG C for 3-8 hours according to a mole ratio of 1:(12-20):(0.02-0.12) so as to obtain 3-chloro-1, 2-propanediol solution; secondly, allowing alkyl glycoside and the 3-chloro-1, 2-propanediol to react at 80-110 DEG C for 0.5-4.0 hours according to a mole ratio of 1:(0.5-5) so as to obtain chlorohydrin glucoside solution; thirdly, adjusting pH of the chlorohydrin glucoside solution to 6-9, adding 33.3% dimethylamine solution according to a mole ratio of the chlorohydrin glucoside to the dimethylamine, 1:(0.2-2.2); and fourthly, adding crosslinking agent accounting for 2%-5% of the dimethylamine in effective content; and allowing for polymerization at 40-80 DEG C for 1-5 hours before concentration, drying and crushing to obtain the finished alkyl glucoside polyamide. Water is used as solvent in reaction. The preparation process is simple and environment-friendly, and the drilling fluid inhibitor is high in shale inhibition performance.

Description

Technical field: [0001] The invention relates to an inhibitor for drilling fluid and a preparation method thereof, in particular to an alkyl glycoside polyamine and a preparation method thereof, and belongs to the technical field of oilfield chemical drilling fluid treatment agents. Background technique: [0002] At present, the inhibitors commonly used in drilling fluids mainly include asphalt, inorganic salts, synthetic polymers, etc. These inhibitors have some shortcomings, such as asphalt is not conducive to environmental protection; silicate will make the system rheological It is difficult to control; the alkyl glycosides developed in recent years have a large dosage, high cost, and the inhibitory performance needs to be improved, which cannot effectively solve the drilling problem of mud shale. The poor compatibility of amine-based inhibitors with other treatment agents, especially anionic drilling fluid treatment agents, limits its application. Invention content: ...

Claims

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Application Information

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IPC IPC(8): C09K8/035
Inventor 司西强王中华魏军甄剑武雷祖猛赵虎张麒麟
Owner CHINA PETROLEUM & CHEM CORP
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