Preparation of viscosifiers for zinc salt workover and completio

Details Preparation of viscosifiers for zinc salt workover and completio Preparation of viscosifiers for zinc salt workover and completio

1981-06-26

1983-11-15

Guynn, Herbert B.

Compositions

Leather or fur treating

2523635, 536 52, 536114, E21B 4300

Patent

active

044154631

ABSTRACT:
Viscosifiers for addition to high zinc salt brines, used as oil well workover and completion fluids, are prepared from natural polysaccharide gums by treatment with a basic nitrogen reagent, such as a quaternary ammonium compound, hexamethylene tetramine, or dimethylol urea. The treated viscosifiers have improved dispersibility and give increased viscosity effects in the brines. Preferably, the viscosifiers are prepared from carrageenan or locust bean gums.

REFERENCES:
patent: 2879268 (1959-03-01), Jullander
patent: 3126950 (1964-03-01), Carlberg et al.
patent: 3297583 (1967-01-01), Dierichs et al.
patent: 3356519 (1967-12-01), Chambers et al.
patent: 3912713 (1975-10-01), Boonstra et al.
patent: 4003838 (1977-01-01), Jackson et al.
patent: 4140639 (1979-02-01), Jackson
patent: 4350601 (1982-09-01), Mosier et al.

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