Timing the deposition of an asphalt plugging material from an as

Details Timing the deposition of an asphalt plugging material from an as Timing the deposition of an asphalt plugging material from an as

1975-11-13

1977-01-11

Novosad, Stephen J.

Wells

Processes

Cementing, plugging or consolidating

61 36D, 166246, 166300, 252 85P, E21B 33138

Patent

active

040022048

ABSTRACT:
In plugging a relatively low temperature subterranean earth formation by injecting a cationic emulsion that contains an asphalt and a pH-increasing reactant that subsequently breaks the emulsion, the timing of the emulsion breaking is improved by using a pH-increasing reactant comprising a mixture of urea and urease.

REFERENCES:
patent: 2681704 (1954-06-01), Menaul
patent: 2801218 (1957-07-01), Menaul
patent: 3509950 (1970-05-01), Kazmann et al.
patent: 3614985 (1971-10-01), Richardson
patent: 3730272 (1973-05-01), Richardson et al.
patent: 3815681 (1974-06-01), Richardson
patent: 3901316 (1975-08-01), Knapp

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