Well cementing method using acid removable low density well ceme

Details Well cementing method using acid removable low density well ceme Well cementing method using acid removable low density well ceme

1992-02-19

1993-05-25

Novosad, Stephen J.

Wells

Processes

Cementing, plugging or consolidating

106686, 106688, E21B 3313

Patent

active

052131610

ABSTRACT:
Low density well cement compositions which set into hard substantially impermeable masses, but which are removable by dissolution in acid, and methods of utilizing such compositions for forming removable cement plugs or seals in subterranean zones are provided. The compositions are comprised of pumpable foamed slurries of magnesium oxychloride cement.

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patent: 3816148 (1974-06-01), Barthel
patent: 4300633 (1981-11-01), Stewart
patent: 4415366 (1983-11-01), Copening
patent: 4466833 (1984-08-01), Spangle
patent: 4676318 (1987-06-01), Myers et al.
patent: 5147565 (1992-09-01), Bour et al.

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