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

Viscoelastic surfactants and methods of making and using same

A technology of surfactants and mixtures, used in chemical instruments and methods, earth-moving drilling, wellbore/well components, etc., can solve problems such as large quantities of materials, difficulty in removal, etc.

Inactive Publication Date: 2012-11-28
HALLIBURTON ENERGY SERVICES INC
View PDF4 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional lost circulation agents may have many disadvantages, such as the large amount of material required to obtain desired properties (such as viscosity, etc.), and the difficulties involved in removing the constituent materials of the lost circulation agent after processing

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
  • Viscoelastic surfactants and methods of making and using same
  • Viscoelastic surfactants and methods of making and using same
  • Viscoelastic surfactants and methods of making and using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The rheological properties of CASP-VC of the type described herein were investigated. Eight samples were prepared, designated Samples 1-8. Sodium oleate (NaOle), commercially available from TCI, USA, was used as the anionic surfactant and octyltrimethylammonium chloride (C 8 TAC) was used as the cationic surfactant to prepare samples 1-4. use C 8 Samples 1-4 were prepared at ratios of TAC:NaO of 3:7, 4:6, 2:8, and 1:9, respectively. A sufficient amount of the sample was then dissolved in deionized water (DI H 2 O) to form a 3wt.% solution. The resulting CASP-VC was anion-rich due to the larger anion-to-cation ratios of samples 1-4.

[0051] Sodium caprylate (NaCap) commercially available from TCI USA was used as anionic surfactant and octadecyltrimethylammonium chloride (C 18 TAC) was used as the cationic surfactant to prepare samples 5-8. Samples 5-8 were prepared using C18TAC:NaCap ratios of 7:3, 6:4, 8:2, and 9:1, respectively. Sufficient amounts of these sam...

Embodiment 2

[0057] The zero-shear viscosity of anion-rich and cation-rich CASP-VC was studied. Samples 1-8 described in Example 1 were used again in this example. In addition, five more samples were prepared according to the description in Example 1, named samples 9-13. Table 2 shows the cationic and anionic surfactants and CAR for samples 9-13.

[0058] Table 2

[0059] sample

[0060] image 3 is a graph of the viscosity of samples 1-13 as a function of the weight fraction of the minor component. For samples 1-4 and 9-11, the subcomponent was cationic surfactant. For samples 5-8 and 12-13, the subcomponent was anionic surfactant. The results showed that the CARs that produced the greatest viscosity were about 70:30 and 30:70, as image 3 The peaks on the anion-rich and cation-rich CASP-VC are shown. Additionally, the viscoelasticity of both cation-rich and anion-rich CASP-VC exhibited up to a 300,000-fold increase compared to the surfactant component alone. This increa...

Embodiment 3

[0062] The kinetic properties of CASP-VC of the type described herein were investigated. Specifically, samples 1-3 and 5-7 in Example 1 were measured for complex viscosity, storage modulus, and loss modulus as a function of frequency. Figure 4 and 5 Graphs of complex viscosity, storage modulus, and loss modulus as a function of frequency for samples 1-3 and samples 5-7, respectively. It was shown that these fluids exhibited significant loss and storage moduli, demonstrating their viscoelastic properties.

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
Viscosityaaaaaaaaaa
Login to View More

Abstract

A method of servicing a wellbore comprising placing downhole a composition comprising a surfactant package comprising a cationic surfactant and anionic surfactant, wherein the surfactant package when contacted with an aqueous solution forms a viscosified composition in the presence of less than about 30 wt.% of a hydrotrope.

Description

technical field [0001] The present disclosure generally relates to wellbore servicing fluids. More specifically, the present invention relates to viscoelastic surfactants and methods of making and applications thereof. Background technique [0002] Natural resources, such as natural gas, oil, and water that exist in a subterranean formation or subterranean zone, are often obtained by drilling a wellbore down the formation while circulating a drilling fluid through the well. During drilling of a wellbore, drilling fluid is circulated down the drill string, through the drill bit, and onto the surface of the annulus between the wellbore wall and the drill string. The drill string may be drill pipe, casing string or any other suitable conduit. In particular, the circulating drilling fluid lubricates the drill bit, carries cuttings to the surface, and balances the formation pressure applied to the wellbore. One problem associated with drilling a wellbore can be the loss of lar...

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): C09K8/035C09K8/40C09K8/42C09K8/60C09K8/68E21B43/04
CPCC04B28/02C09K8/68C09K8/40C04B40/0039C09K2208/30C09K8/42C09K8/035C09K8/602E21B43/04C04B22/0026C04B22/124C04B22/128C04B24/04C04B2103/402C04B2103/404
Inventor 瑞安·范桑特恩道格拉斯·J·哈里森
Owner HALLIBURTON ENERGY SERVICES INC
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