Use of cellulose derivatives in drilling fluids

Details Use of cellulose derivatives in drilling fluids Use of cellulose derivatives in drilling fluids

1988-12-09

1990-11-20

Nutter, Nathan M.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

523131, 536 90, 536 92, 536 97, 536 98, 252 8513, C09K 700, C08B 11193, C08B 1100, C08B 1112

Patent

active

049720074

ABSTRACT:
Cellulose derivatives which are substituted in a specified manner by both carboxyalkyl groups and sulphoalkyl groups which are suitable in drilling fluids.

REFERENCES:
patent: 2811519 (1957-10-01), Touey
patent: 4110226 (1978-08-01), Swanson
patent: 4507474 (1985-03-01), Raehse et al.
patent: 4519923 (1985-05-01), Hori et al.

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