Readily water-miscible beta-glucan suspensions

A technology of suspension and dextran, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve problems such as insufficient viscosity establishment and poor filterability

Inactive Publication Date: 2019-12-06
CARGILL INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, conventional forms of β-glucan are difficult to dissolve or disperse into solutions to form effective subterranean treatment fluids, and suffer from problems such as long mixing times, high shear required for mixing, insufficient viscosity build-up during mixing, and during subsurface use. Problems with poor filterability (e.g., clogged pores in subterranean formations)

Method used

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  • Readily water-miscible beta-glucan suspensions
  • Readily water-miscible beta-glucan suspensions

Examples

Experimental program
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Effect test

Embodiment

[0063] Various aspects of the invention may be better understood with reference to the following examples, which are provided by way of illustration. The invention is not limited to the examples given herein.

[0064] Stir Plate Shear Rate Calculation. The diameter of the shear element used was about 2.5-10 cm with a gap of about 1-2 mm between the shear element and the bottom of the beaker. The shear rate is about 700 rpm. D*π*rpm*(1 min / 60 sec) = distance traveled by the outer edge of the shearing element per second, which can be divided by the gap distance to estimate the shear rate. (2.5 to 10cm)*π*700rpm*(1 minute / 60 seconds) / 0.1 to 0.2cm=about 460s -1 to about 3,670s -1 .

[0065] Part I. Preparation of β-glucan.

[0066] Using a moderately agitated 5000 liter jacketed vessel, commercial CS6 (coarse powder blend of scleroglucan and Sclerotinia neat organisms powder) was added to 2400 liters of 11.8°C water and mixed for 1 hour. After mixing for 1 hour, the vess...

Embodiment II-1 to II-5

[0082] The various solvents or solvent mixtures shown in Table 1 were used to form β-glucan suspensions, which were then dispersed in synthetic seawater.

Embodiment II-1 and II-2

[0083] For Examples II-1 and II-2, by hydrating an appropriate weight of butanol and hydrating and at about 460s- 1 to about 3,670s- 1 A solvent mixture of 90% butanol, 10% deionized water by weight was prepared under agitation on a stir plate for about 1-5 minutes.

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Abstract

Readily water-miscible beta-glucan suspensions and methods of making and using the same. A readily water-miscible beta-glucan suspension includes a beta-glucan and a water-miscible organic fluid thatcomprises an alcohol, an alpha-hydroxy acid alkyl ester, a polyalkylene glycol alkyl ether, or a combination thereof, wherein the suspension is sufficient such that mixing with water at a shear rate of 40,000 s-1 or more forms a homogeneous mixture of the suspension and the water. The present invention also provides methods of dispersing the water-miscible beta-glucan suspension in water to form homogenous mixtures of the suspension and the water, methods of treating subterranean formations with such homogeneous mixtures, and methods of making the suspension.

Description

Background technique [0001] Beta-glucans are useful as thickeners in aqueous subterranean treatment fluids, such as in enhanced oil recovery (EOR). Fully diluted and ready-to-use aqueous β-glucan solutions are expensive and undesirable due to shipping costs and lack of space (especially for offshore applications); therefore, to avoid unnecessary water shipping, solid or concentrated forms β-glucan is preferred for such applications. However, conventional forms of β-glucan are difficult to dissolve or disperse into solutions to form effective subsurface treatment fluids, and suffer from problems such as long mixing times, high shear required for mixing, insufficient viscosity build-up during mixing, and during subsurface use. Problems with poor filterability (eg, clogged pores in subterranean formations). Contents of the invention [0002] The present invention provides an easily water-dispersible β-glucan (BG) suspension. The suspension may comprise BG and an organic flui...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/00C09K8/504
CPCC08B37/0024C08L5/00C09K8/588
Inventor 杰弗里·J·马尔萨姆埃里克·斯坦利·萨姆纳蒂莫西·沃尔特·亚伯拉罕
Owner CARGILL INC
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