Clay-free, thixotropic wellbore fluid

Details Clay-free, thixotropic wellbore fluid Clay-free, thixotropic wellbore fluid

1975-09-25

1978-07-04

Guynn, Herbert B.

Compositions

Leather or fur treating

252 85C, 252 855R, C09K 702

Patent

active

040987000

ABSTRACT:
A clay-free wellbore fluid having thixotropic properties, good surface handling characteristics and excellent subterranean characteristics such as particle handling gel strength, and low water loss has been devised by the combination of a heteropolysaccharide prepared by the action of bacteria of the genus Xanthomonas on carbohydrates, modified starch and MgO. In some situations a salt of lignosulfonate is added to maintain the desirable properties of the wellbore fluid.

REFERENCES:
patent: 2561418 (1951-07-01), Ryan
patent: 2813093 (1957-11-01), Caldwell et al.
patent: 2970140 (1961-01-01), Hullinger et al.
patent: 3033852 (1962-05-01), Paschall
patent: 3319715 (1967-05-01), Parks
patent: 3852201 (1974-12-01), Jackson
patent: 3872018 (1975-03-01), Alexander
patent: 3956141 (1976-05-01), Walker
patent: 4003838 (1977-01-01), Jackson et al.

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