Technique for controlling lost circulation employing improved so

Details Technique for controlling lost circulation employing improved so Technique for controlling lost circulation employing improved so

1977-09-26

1979-11-13

Guynn, Herbert B.

Wells

Processes

Cementing, plugging or consolidating

175 72, 252 85LC, E21B 33138, E21B 3313

Patent

active

041739990

ABSTRACT:
This specification discloses a method of controlling the loss of drilling fluid into a lost circulation zone of a subterranean earth formation penetrated by a well. A nonaqueous slurry of a hydratable material and an oleophilic clay is introduced into the well and mixed in the vicinity of the lost circulation zone with an aqueous liquid to form a soft plug.

REFERENCES:
patent: Re24942 (1961-02-01), Howard et al.
patent: 2776112 (1957-01-01), Ilfrey et al.
patent: 2800964 (1957-07-01), Garrick
patent: 2990016 (1961-06-01), Goins et al.
patent: 3126958 (1964-03-01), Bearden et al.
patent: 3467208 (1969-09-01), Kelly
patent: 3724564 (1973-04-01), Messenger
patent: 3876006 (1975-04-01), Messenger
patent: 3987855 (1976-10-01), Messenger

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