High temperature retarders for oil field cements, cement slurrie

Compositions: coating or plastic – Coating or plastic compositions – Inorganic settable ingredient containing

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Details

106724, 106819, 106823, 523130, C04B 2400

Patent

active

055036716

ABSTRACT:
The invention relates to the cementing of high temperature wells. A cement retarder comprises a phosphonic acid derivative combined with borax in a weight ratio of phosphonic acid derivative to borax of about 0.025 to about 0.2. A long pumping time is realized with rapid compressive strength development following placement.

REFERENCES:
patent: 3346488 (1967-10-01), Lyons et al.
patent: 3483007 (1969-12-01), Hook
patent: 3748159 (1973-07-01), George
patent: 4466836 (1984-08-01), Crump et al.
patent: 4470463 (1984-09-01), Holland
patent: 4941536 (1990-07-01), Brothers et al.
patent: 4997487 (1991-03-01), Vinson et al.

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