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

Nanocellulose-stabilized Pickering emulsion type drilling fluid and preparation method thereof

A nanocellulose and drilling fluid technology, applied in the field of drilling fluid, can solve the problems of low environmental protection and poor stability, achieve good rheological properties, reduce usage, improve rheology and fluid loss performance

Active Publication Date: 2022-01-28
NANJING FORESTRY UNIV
View PDF8 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual application process, there are unavoidable problems in the biodiesel emulsion drilling fluid: (1) It is necessary to add chemical additives such as surfactants or compatibilizers to obtain a stable emulsion drilling fluid, which is environmentally friendly (2) Poor stability under formation conditions such as high temperature and high pressure, high salt and high calcium; (3) Additional additives such as thickeners and fluid loss control agents are required to meet the requirements of drilling fluids

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
  • Nanocellulose-stabilized Pickering emulsion type drilling fluid and preparation method thereof
  • Nanocellulose-stabilized Pickering emulsion type drilling fluid and preparation method thereof
  • Nanocellulose-stabilized Pickering emulsion type drilling fluid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The present embodiment provides a kind of nanocellulose stable Pickering emulsion type drilling fluid, is made up of cellulose nanofibril (CNF) aqueous dispersion liquid and biodiesel, described cellulose nanofibril (CNF) aqueous dispersion liquid and The volume ratio of biodiesel is 3:1, and the mass percent concentration of the cellulose nanofibril (CNF) aqueous dispersion is 2 wt%.

[0047] The preparation method of the Pickering emulsion type drilling fluid that described nanocellulose is stable is as follows:

[0048] S1, preparation of cellulose nanofibril (CNF) aqueous dispersion; specifically include the following steps:

[0049] S1-1. Pretreatment of eucalyptus powder: hydrothermally treat eucalyptus powder <200 μm in a water bath at 90-100°C for 3-4 hours, centrifuge at a centrifugal speed of 3000rpm for 3min, and dry the precipitate at 60°C;

[0050] S1-2. Dehemicellulose removal of eucalyptus fibers: collect 20 g of dried eucalyptus fibers in step S1-1 and ...

Embodiment 2

[0058] The present embodiment provides a kind of nanocellulose stable Pickering emulsion type drilling fluid, is made up of cellulose nanocrystal (CNC) aqueous dispersion liquid and biodiesel, described cellulose nanocrystal (CNC) aqueous dispersion liquid and biodiesel The volume ratio of the cellulose nanocrystal (CNC) aqueous dispersion is 3:1, and the mass percent concentration of the cellulose nanocrystal (CNC) aqueous dispersion is 2wt%.

[0059] The preparation method of the Pickering emulsion type drilling fluid that described CNC is stable is as follows:

[0060] S1, preparing cellulose nanofibril (CNC) water dispersion liquid; Specifically comprise the following steps:

[0061] S1-1. Pretreatment of eucalyptus wood powder: hydrothermally treat eucalyptus wood powder with a particle size of <200 μm in a water bath at 90-100°C for 3-4 hours, centrifuge at a centrifugal speed of 3000rpm for 3 minutes, and dry the precipitate at 60°C;

[0062] S1-2. Dehemicellulose remo...

Embodiment 3

[0070] This embodiment provides a Pickering emulsion type drilling fluid stabilized by nanocellulose, which is composed of cellulose nanofibril (CNF) aqueous dispersion, bentonite and biodiesel, and the cellulose nanofibril (CNF) aqueous dispersion The volume ratio of biodiesel to biodiesel is 3:1, the mass percent concentration of the cellulose nanofibril (CNF) aqueous dispersion is 1 wt%, and the mass ratio of bentonite to CNF is 1:1.

[0071] The preparation method of the Pickering emulsion type drilling fluid that described nanocellulose is stable is as follows:

[0072] S1, preparation of cellulose nanofibril (CNF) aqueous dispersion; specifically include the following steps:

[0073] S1-1. Pretreatment of eucalyptus wood powder: hydrothermally treat eucalyptus wood powder with a particle size of <200 μm in a water bath at 90-100°C for 3-4 hours, centrifuge at a centrifugal speed of 3000rpm for 3 minutes, and dry the precipitate at 60°C;

[0074] S1-2. Dehemicellulose re...

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

PropertyMeasurementUnit
diameteraaaaaaaaaa
lengthaaaaaaaaaa
Login to View More

Abstract

The invention provides a nanocellulose-stabilized pickering emulsion type drilling fluid and a preparation method thereof. According to the nanocellulose-stabilized Pickering emulsion type drilling fluid, nanocellulose (cellulose nanofibrils (CNF) and cellulose nanocrystals (CNC)) is used as a green and environment-friendly emulsion stabilizing, rheology and filtration modifier, a nanocellulose aqueous dispersion is in the concentration range of 0.5-2.5 wt%, the nanocellulose aqueous dispersion and biodiesel are mixed according to the volume ratio of 2: 1-4: 1, and ultrasonic emulsification is carried out to form the Pickering emulsion type drilling fluid. Or a proper amount of bentonite is added to reduce the use amount of the nanocellulose, and the rheological property and filtrate loss reduction property of the drilling fluid are further improved. The Pickering emulsion type drilling fluid with stable nanocellulose, which is prepared by the method disclosed by the invention, has the characteristics of greenness and environmental protection and excellent rheology and filtrate loss reduction performance.

Description

technical field [0001] The invention belongs to the technical field of drilling fluids, in particular to a Pickering emulsion type drilling fluid stabilized by nanocellulose. Background technique [0002] Drilling fluid is regarded as the "blood" of drilling. During the drilling and exploration process, it can play a key role in cleaning drilling debris and preventing drilling accidents such as collapse, stuck pipe, lost circulation and blowout. With the increasing emphasis on environmental protection in our country, it is imminent to develop green and high-performance drilling fluids. In recent years, biodiesel emulsion drilling fluid has been successfully used due to its low toxicity, environmental protection, stable emulsification performance, good rheological properties, small reservoir damage, high flash point, good safety performance and excellent lubricating performance. Applied in the field of oil and gas extraction. However, in the actual application process, ther...

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): C09K8/035C09K8/32C08B15/04
CPCC09K8/035C09K8/32C08B15/04C09K2208/10C09K2208/12C09K2208/08
Inventor 李美春刘馨月
Owner NANJING FORESTRY UNIV
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