High temperature retarders for oil field cements, cement slurrie

Details High temperature retarders for oil field cements, cement slurrie High temperature retarders for oil field cements, cement slurrie

1994-03-08

1996-04-02

Bell, Mark L.

Compositions: coating or plastic

Materials or ingredients

Additive materials for inorganic cements which contain a...

106717, 106719, 106724, 106810, 106806, 106815, 106823, C04B 2216

Patent

active

055036724

ABSTRACT:
The invention relates to the cementing of high temperature wells. The retarder consists of a methylene phosphonic acid derivative and of a boric acid or a borate at least as acid as borax in an aqueous solution, in particular, Na pentaborate, in a preferred ratio of 0.08 to 0.92 parts by weight. A long setting time and a very swift compressive strength development are obtained at the same time.

REFERENCES:
patent: 3748159 (1973-07-01), George
patent: 3753748 (1973-08-01), Martin
patent: 4131578 (1978-12-01), Crinkelmeyer et al.
patent: 4468252 (1984-08-01), Crump et al.
patent: 4941536 (1990-07-01), Brothers et al.

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