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Readily water-miscible [beta]-glucan suspensions

A water-miscible, suspension technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of poor filterability, long mixing time, insufficient viscosity establishment, etc., and achieve less blockage of flow paths and good filterability. Effect

Inactive Publication Date: 2019-11-19
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 subsurface treatment fluids, and suffer from problems such as long mixing times required, high shear requirements for mixing, viscosity during mixing, Problems with insufficient establishment and poor filterability during underground use (eg, clogging the pores of 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

[0068] Various aspects of the invention may be better understood by reference to the following examples, which are provided by way of illustration. The invention is not limited to the examples given herein.

[0069] Stir plate shear rate calculation. The diameter of the shearing element used was about 2.5-10 cm with a gap of about 1-2 mm between the shearing 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 .

[0070] Part I. Preparation of β-glucan.

[0071] Using a 5000 liter jacketed vessel with moderate agitation, 7 g / L commercial CS6 (coarse powder blend of scleroglucan and sclerotium rolfsii organism powder) was added to 2400 liters of 11.8°C water and mixed for 1 hour. After mixing for ...

Embodiment II-1 to II-5

[0087] The various solvents or solvent mixtures shown in Table 1 were used to form beta-glucan suspensions which were then dispersed in synthetic seawater.

Embodiment II-1 and II-2

[0088] For Examples II-1 and II-2, by mixing the appropriate weight of butanol and water and at about 460s -1 to about 3,670s -1 A solvent mixture of 90% butanol, 10% deionized water by weight was prepared under stirring on a stir plate for about 1-5 minutes.

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Abstract

The present invention provides 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 anda water-miscible organic fluid that comprises 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 transportation costs and lack of space (especially for offshore applications); therefore, to avoid unnecessary water transportation, solid or concentrated forms of Beta-glucans are 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 required, high shear requirements for mixing, viscosity during mixing, Problems with insufficient establishment and poor filterability during subterranean use (eg, clogging pores of subterranean formations). Contents of the invention [0002] The present invention provides a water-miscible β-glucan (BG) suspension comprising BG and a wat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L5/00C08B37/00
CPCC08B37/0024C08L5/00C09K8/035C09K8/588
Inventor 蒂莫西·沃尔特·亚伯拉罕杰弗里·J·马尔萨姆埃里克·斯坦利·萨姆纳
Owner CARGILL INC
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