Process for plugging a subterranean formation

Details Process for plugging a subterranean formation Process for plugging a subterranean formation

1983-10-06

1985-10-22

Suchfield, George A.

Wells

Processes

Cementing, plugging or consolidating

166292, 166300, E21B 33138

Patent

active

045482705

ABSTRACT:
Aqueous silicate solutions when admixed, intermingled or otherwise contacted with hydraulic cement slurries cause a very rapid gelation and accelerated setting of the hydraulic cement composition.
It has now been discovered that this rapid gelation/accelerated setting phenomenon can be controlled and substantially delayed by incorporating a water soluble inorganic phosphate salt into an aqueous spacer fluid positioned between said silicate solution and said cement slurry as such materials are being sequentially injected into a subterranean formation.

REFERENCES:
patent: 1547189 (1925-07-01), Wilson
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patent: 2233974 (1941-03-01), Dunn
patent: 2848340 (1958-08-01), Haldas
patent: 3625286 (1971-12-01), Parker
patent: 3658131 (1972-04-01), Biles
patent: 3672173 (1972-06-01), Paramore et al.
patent: 4014174 (1977-03-01), Mondshine
patent: 4054461 (1977-10-01), Martin
patent: 4083407 (1978-04-01), Griffin, Jr. et al.
patent: 4257483 (1981-03-01), Morris et al.

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