Chemical process for backsurging fluid through well casing perfo

Details Chemical process for backsurging fluid through well casing perfo Chemical process for backsurging fluid through well casing perfo

1979-12-20

1981-09-15

Guynn, Herbert B.

Compositions

Leather or fur treating

252 855R, 252186, 252187H, E21B 4325

Patent

active

042896339

ABSTRACT:
A backsurge of fluid through perforations in a well casing is chemically induced by injecting into the surrounding reservoir a solution which contains (a) nitrogen gas-generating reactants, (b) a reaction-retarding alkaline buffer, and (c) a pH-reducing reactant that is capable of subsequently overriding the buffer, so that a rapid production of gas and heat causes a backsurging of fluid into the wellbore.

REFERENCES:
patent: 3215199 (1965-11-01), Dilgren
patent: 3767586 (1973-10-01), Rutkiewic et al.
patent: 3828854 (1974-08-01), Templeton et al.
patent: 3868998 (1975-03-01), Lybarger et al.
patent: 4178993 (1979-12-01), Richardson et al.

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