Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Polyamine shale inhibitor and preparation method thereof

A technology of shale inhibitor and polyamine, which is applied in the directions of chemical instruments and methods, drilling compositions, etc., to achieve the effects of improved compatibility, excellent inhibitory performance, and shortened reaction time.

Active Publication Date: 2015-05-06
CHINA PETROLEUM & CHEM CORP +1
View PDF6 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the shale inhibitor has an outstanding inhibitory effect, its compatibility with the drilling fluid system needs to be further improved

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
  • Polyamine shale inhibitor and preparation method thereof
  • Polyamine shale inhibitor and preparation method thereof
  • Polyamine shale inhibitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] First set the reaction temperature to 65°C, stir and pass ethylene oxide into diethylenetriamine, the molar ratio of diethylenetriamine to ethylene oxide is 1:2, control the reaction temperature not lower than 60°C , react for 3h; then raise the temperature to 80°C, add epichlorohydrin dropwise under stirring condition, the molar ratio of epichlorohydrin to diethylenetriamine is 0.6:1, the reaction time is 2h, and finally add the terminator concentrated hydrochloric acid , the molar ratio of concentrated hydrochloric acid to diethylenetriamine is 1:1, and the polyamine shale inhibitor is prepared after 1 hour of reaction.

Embodiment 2

[0024] Set the reaction temperature to 75°C, stir and add propylene oxide dropwise into triethylenetetramine, the molar ratio of triethylenetetramine to propylene oxide is 1:3, control the reaction temperature not lower than 70°C, and react 2h; then raise the temperature to 90°C, add epichlorohydrin dropwise under stirring condition, the molar ratio of epichlorohydrin to diethylenetriamine is 0.5:1, and the reaction time is 3h; finally add the terminator formic acid, The molar ratio of formic acid to diethylenetriamine was 1.5:1, and the polyamine shale inhibitor was prepared after 1.5h of reaction.

Embodiment 3

[0026] Set the reaction temperature to 85°C, stir and add propylene oxide dropwise into tetraethylenepentamine, the molar ratio of tetraethylenepentamine to propylene oxide is 1:2.5, control the reaction temperature not lower than 80°C, and react 1.5h; then raise the temperature to 100°C, add epichlorohydrin dropwise under stirring, the molar ratio of epichlorohydrin to diethylenetriamine is 0.8:1, and the reaction time is 2h; finally add the terminator acetic acid , the molar ratio of acetic acid to diethylenetriamine was 1.8:1, and the polyamine shale inhibitor was prepared after 1 hour of reaction.

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 a preparation method for a polyamine shale inhibitor. The method comprises the following steps: (1) adding cyclic ether into polyethylene polyamine at a temperature of 50 to 90 DEG C under mixing, wherein a mol ratio of polyethylene polyamine to cyclic ether is 1:2-3, and reaction time is 1 to 4 h; (2) heating the material obtained in the step (1) to 70 to 110 DEG C and adding epichlorohydrin under stirring, wherein a mol ratio of epichlorohydrin to polyethylene polyamine is 0.4-0.9:1, and reaction time is 1 to 3 h; and (3) adding a terminator into the material obtained in the step (2), wherein a mol ratio of the terminator to polyethylene polyamine is 1-2.5:1, reaction time is 1 to 2 h, and the polyamine shale inhibitor is prepared after the reaction. The polyamine shale inhibitor provided by the invention has excellent shale inhibition performance and significantly-improved compatibility; and the preparation method for the polyamine shale inhibitor is simple, has low cost, does not produce special smell and is friendly to the environment.

Description

technical field [0001] The invention relates to a polyamine shale inhibitor and a preparation method thereof. Background technique [0002] Drilling fluid refers to the general term of various circulating fluids that meet the drilling needs with its multiple functions during the oil and gas drilling process. The functions of drilling fluid mainly include: carrying and suspending cuttings; stabilizing well wall and balancing formation pressure; cooling and lubricating drill bit and drilling tools; transmitting hydrodynamic force. [0003] With the development of the field of oil and gas exploration, the emergence of deep wells, ultra-deep wells, ocean wells and wells in complex areas, the difficulty of drilling has increased, and the requirements for drilling fluid systems have become more and more stringent. Especially in the process of oil and gas drilling, when drilling into shale formations, the hydration expansion and dispersion of shale will lead to a series of...

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): C09K8/035C08G65/28
CPCC08G65/2621C09K8/035C09K2208/12
Inventor 杨超鲁娇陈楠张志智尹泽群刘全杰
Owner CHINA PETROLEUM & CHEM CORP
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com