Methods, additives and compositions for temporarily sealing high

Details Methods, additives and compositions for temporarily sealing high Methods, additives and compositions for temporarily sealing high

1981-08-21

1983-03-29

Morris, Theodore

Wells

Processes

Cementing, plugging or consolidating

106194, 106208, 166294, 252 85LC, 524 55, C08L 108, C08L 500, E21B 33138

Patent

active

043780490

ABSTRACT:
Methods, additives and compositions for selectively temporarily sealing high temperature permeable formations penetrated by well bores. The compositions are formed by dispersing a granular additive into an aqueous medium which contains a galactomannan gum treated with potassium pyroantimonate whereby the hydration rate of the gum is retarded at temperatures below about 120.degree. F. but increases at temperatures thereabove. When the composition is introduced into a high temperature permeable formation, it is heated whereby the treated galactomannan gum hydrates and the composition is formed into a stiff gel.

REFERENCES:
patent: 3740360 (1973-06-01), Nimerick et al.
patent: 3766984 (1973-10-01), Nimerick
patent: 4144179 (1979-03-01), Chatterji
Chem. Abst.: 80:110613m.

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