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

Method for degrading guanidine gum in waste fracturing fluid under coupling of potassium ferrate and ultrasonic intensification

A technology of potassium ferrate and fracturing waste liquid, applied in chemical instruments and methods, neutralized water/sewage treatment, oxidized water/sewage treatment, etc., can solve problems such as pollution, high formation or environment, and reduce CODCr value and viscosity, the effect of improving chroma

Active Publication Date: 2016-05-04
BC P INC CHINA NAT PETROLEUM CORP +1
View PDF8 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a method for degrading guar gum in the fracturing waste liquid by coupling with potassium ferrate and ultrasonic waves, which overcomes the above-mentioned deficiencies in the prior art. It can effectively solve the problem of formation or environmental pollution caused by the high COD Cr value of the fracturing waste liquid caused by the large amount of guar gum after the existing process treats the fracturing waste liquid

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1, the method for degrading the guar gum in the fracturing waste liquid by the enhanced coupling of potassium ferrate and ultrasonic waves is carried out according to the following steps: the first step, the fracturing waste liquid is left to stand, and the oil in the upper layer is separated after standing Suspended matter and the silt in the lower layer are obtained to obtain the clear liquid; in the second step, absolute ethanol is added to the clear liquid for purification, and after purification, the guar gum solution is obtained after filtering through a semi-permeable membrane; in the third step, the guar gum solution is added Alkali regulator, adjust the pH value of the guar gum solution to 8 to 11; the fourth step, add potassium ferrate aqueous solution to the guar gum solution after the pH adjustment and mix evenly to obtain a mixed solution, and then use ultrasonic external field to strengthen the oxidation of the mixed solution, After deep oxidat...

Embodiment 2

[0016] Embodiment 2, the method for degrading the guar gum in the fracturing waste liquid by the enhanced coupling of potassium ferrate and ultrasonic waves is carried out according to the following steps: the first step, the fracturing waste liquid is left to stand, and the oil in the upper layer is separated after standing Suspended matter and the silt in the lower layer are obtained to obtain the clear liquid; in the second step, absolute ethanol is added to the clear liquid for purification, and after purification, the guar gum solution is obtained after filtering through a semi-permeable membrane; in the third step, the guar gum solution is added Alkali regulator, adjust the pH of the guar gum solution to be 8 or 11; the fourth step, add potassium ferrate aqueous solution to the guar gum solution after the pH adjustment and mix evenly to obtain a mixed solution, and then use an ultrasonic external field to strengthen the oxidation of the mixed solution, After deep oxidat...

Embodiment 3

[0017] Example 3, as an optimization of the above example, the amount of absolute ethanol added is 0.1% to 10% of the mass of the supernatant.

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 relates to the technical field of waste fracturing fluid, in particular to a method for degrading guanidine gum in waste fracturing fluid under the coupling of potassium ferrate and ultrasonic intensification. The method includes the following steps that firstly, the waste fracturing fluid is separated after standing to obtain clear fluid; secondly, absolute ethyl alcohol is added into the clear fluid for purification; thirdly, an alkali regulator is added into the purified guanidine gum solution to regulate the pH value; fourthly, a potassium ferrate aqueous solution is added, meanwhile external-field ultrasonic intensification and oxidization are carried out, and qualified flowback fracturing fluid is obtained. According to the method of deeply oxidizing guanidine gum in the waste fracturing fluid with potassium ferrate under external-field ultrasonic intensification, guanidine gum is deeply oxidized under the coupling of the oxidizing agent and the external-field acting force, and the CODCr value and viscosity of the waste fracturing fluid are effectively reduced; meanwhile, secondary pollution is not generated in the treating process as potassium ferrate serves as the oxidizing agent and is environmentally friendly, and the chroma of the flowback fluid is increased as ferric hydroxide generated after potassium ferrate is reduced has the flocculation and precipitation effect.

Description

technical field [0001] The invention relates to the technical field of fracturing waste liquid, and relates to a method for degrading guar gum in fracturing waste liquid by using potassium ferrate and ultrasonic intensified coupling. Background technique [0002] The waste fluid produced during the fracturing process of oil and gas wells is mainly the waste fluid discharged to the ground after the fracturing operation is completed, suspended oil particles in the liquid and a variety of water-soluble polymers that are difficult to remove, including guar gum and many organic Additives, mainly including polycyclic aromatic hydrocarbons and benzene-derived compounds, are extremely stable, highly toxic, and contain chloride ions and heavy metal ions mainly iron. The fracturing flowback waste fluid has high viscosity and high COD Cr value, high oil content, high chroma and high content of suspended solids. If these waste liquids are discharged directly without treatment, it w...

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
IPC IPC(8): C02F9/08
CPCC02F1/36C02F1/40C02F1/44C02F1/5245C02F1/66C02F1/72C02F9/00C02F2001/007C02F2101/30
Inventor 王爱军黄强杨萍萍谢亮李予罗春林付蕾徐彬沈晓燕马尧
Owner BC P INC CHINA NAT PETROLEUM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com