Use of cellulose mixed ethers as additives for earth pressure sh

Details Use of cellulose mixed ethers as additives for earth pressure sh Use of cellulose mixed ethers as additives for earth pressure sh

1996-06-10

1998-09-15

Leary, Louise

Organic compounds -- part of the class 532-570 series

Organic compounds

Carbohydrates or derivatives

536 95, 536 96, 536 97, 536 98, 536 92, 536 84, 536 85, 507103, 507112, 507113, 507114, 507115, 175267, 175 57, C08B 11193, C08B 1108, C09K 700

Patent

active

058080520

ABSTRACT:
The present invention relates to water-soluble, particularly ternary, preferably ionic, cellulose mixed ethers, more particularly to anionic water-soluble cellulose mixed ethers, as additives for drilling fluid applications.

REFERENCES:
patent: 4460751 (1984-07-01), Hanlon et al.
patent: 4552215 (1985-11-01), Almond et al.
patent: 4649999 (1987-03-01), Sandy er al.
patent: 5358561 (1994-10-01), Kiesewetter et al.
patent: 5385607 (1995-01-01), Kiesewetter et al.
patent: 5395930 (1995-03-01), Bartz et al.
patent: 5591844 (1997-01-01), Bantz et al.

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