Well cementing process using presheared water swellable clays

Details Well cementing process using presheared water swellable clays Well cementing process using presheared water swellable clays

1978-11-15

1980-05-13

Novosad, Stephen J.

Wells

Processes

Cementing, plugging or consolidating

166DIG1, E21B 3314

Patent

active

042024137

ABSTRACT:
A method of preparing and using a cement slurry having water swellable clays therein as extenders for the cement is described, which method enhances the effectiveness of the water swellable clays by preshearing aqueous suspensions thereof prior to mixing these suspensions with cement to form a pumpable cement slurry. Also described is a particular technique for using bentonite as a cement extender in a cement slurry formed with salt water.

REFERENCES:
patent: 2582459 (1952-01-01), Salathiel
patent: 2705050 (1955-03-01), Davis et al.
patent: 3071481 (1963-01-01), Beach et al.
patent: 3168139 (1965-02-01), Kennedy et al.
patent: 3197317 (1965-07-01), Patchen
patent: 3227213 (1966-01-01), Smith
patent: 3557876 (1971-01-01), Tragesser
patent: 3581825 (1971-06-01), Messenger
patent: 3887009 (1975-06-01), Miller et al.

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