Synthesis of hyperbranched polyquaternium intercalation inhibitor and water-based drilling fluid

A technology of hyperbranched polyammonium and quaternary ammonium salts, which is applied in the field of oil and gas field drilling, can solve problems such as inability to effectively suppress well wall instability, achieve the effect of weakening electrostatic repulsion, stable and reliable technology, and high productivity

Active Publication Date: 2022-05-24
成都昂赛福科技有限公司
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem of wellbore instability caused by conventional inhibitors being unable to effectively inhibit shale hydration expansion, the present invention provides a synthesis method of hyperbranched polyquaternium intercalation inhibitors, which can effectively inhibit water in shale formations. Reduce the expansion problem, so as to achieve the purpose of stabilizing the borehole wall

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Synthesis of hyperbranched polyquaternium intercalation inhibitor and water-based drilling fluid
  • Synthesis of hyperbranched polyquaternium intercalation inhibitor and water-based drilling fluid
  • Synthesis of hyperbranched polyquaternium intercalation inhibitor and water-based drilling fluid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The preparation of hyperbranched polyquaternium: 0.3mol2-aminoethyl carbamic acid is dissolved in 100ml methanol solution at normal temperature, then 2-aminoethyl carbamic acid solution is placed in airtight container, at 15 ℃, nitrogen atmosphere Under the condition of stirring, reflux reaction for 10h, and then the reaction product was distilled under reduced pressure to obtain methyl 2-aminoethyl carbamate; Dissolve in 100ml of organic solvent, add N, N-diallylaniline solution dropwise to the 2-aminoethyl carbamate solution under ice-water bath, nitrogen atmosphere, and stirring conditions. After the addition is completed, heat up for 25 After reflux reaction at ℃ for 7 hours, distill under reduced pressure to obtain hyperbranched polyamine; take 0.1mol hyperbranched polyamine and dissolve it in 100ml organic solvent, and dissolve 0.1mol quaternary ammonium salt in 50ml solvent, and add it dropwise under 55℃ nitrogen atmosphere and stirring condition Into the hyperbr...

Embodiment 2

[0029] The preparation of hyperbranched polyquaternium: 0.3mol2-aminoethyl carbamic acid is dissolved in 100ml methanol solution at normal temperature, then 2-aminoethyl carbamic acid solution is placed in airtight container, at 25 ℃, nitrogen atmosphere Under the condition of stirring, reflux reaction for 12h, and then the reaction product was distilled under reduced pressure to obtain methyl 2-aminoethyl carbamate; Dissolve in 100ml organic solvent, add N, N-diallylaniline solution dropwise to 2-aminoethyl carbamate solution under ice-water bath, nitrogen atmosphere and stirring conditions, after the dropwise addition is completed, heat up for 30 After reflux reaction at ℃ for 8 hours, distill under reduced pressure to obtain hyperbranched polyamine; take 0.1mol hyperbranched polyamine and dissolve it in 100ml organic solvent, and dissolve 0.1mol quaternary ammonium salt in 50ml solvent, and add it dropwise under 60℃ nitrogen atmosphere and stirring condition into the hyperb...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses synthesis of a hyperbranched polyquaternary ammonium salt intercalation inhibitor and a water-based drilling fluid. The hyperbranched polyquaternary ammonium salt intercalation inhibitor is prepared by mixing hyperbranched polyquaternary ammonium salt and water, wherein the mass ratio of the hyperbranched polyquaternary ammonium salt in the drilling fluid is 0.5%-5%. Synthetic raw materials of the hyperbranched polyquaternary ammonium salt are carboxylic acid substances containing multiple amino groups and aniline substances containing multiple double bonds, and an end capping reagent is one of acryloyloxyethyl trimethyl ammonium and methacryloyloxyethyl trimethyl ammonium. The drilling fluid comprises the hyperbranched polyquaternium provided by the invention. The drilling fluid can effectively inhibit shale hydration expansion. The shale intercalation inhibitor prepared from the hyperbranched polyquaternium provided by the invention is non-toxic and harmless and is easier to combine with a clay layer with negative electricity, and the inhibition performance of the shale intercalation inhibitor is obviously improved compared with that of similar intercalation inhibitors.

Description

technical field [0001] The invention relates to the technical field of oil and gas field drilling, in particular to the synthesis of a hyperbranched polyquaternary ammonium salt intercalation inhibitor and a water-based drilling fluid containing the inhibitor. Background technique [0002] Borehole wall instability is one of the problems that seriously affect the efficiency of oil and gas drilling and production. The direct or indirect economic losses caused by hole wall instability, diameter shrinkage, diameter expansion, pipe sticking and even well collapse accidents are as high as billions of dollars every year. At present, 75% of the drilled or drilled formations belong to shale formations, and 90% of wellbore instability problems occur in shale formations. This is due to the strong water sensitivity of shale. When the shale formation encounters water, it will produce severe hydration, resulting in hydration expansion and dispersion of shale, resulting in a decrease in t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00C09K8/035C09K8/24
CPCC08G83/006C09K8/035C09K8/24C09K2208/12
Inventor 谢刚谷硕汪若兰
Owner 成都昂赛福科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap