Basic oil well cement

Details Basic oil well cement Basic oil well cement

1977-01-28

1978-07-04

Poer, J.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106 90, 106314, 106315, C04B 735

Patent

active

040986136

ABSTRACT:
A versatile hydraulic basic oil well cement, compatible with retarders and most common field additives and able to perform its intended function over a wide variety of downhole conditions, particularly temperature and pressure, comprises a common moderate or high sulfate resistant clinker and a weight ratio of calcium sulfate hemihydrate to insoluble anhydrite of 20:80 to 45:55. It can be made either by adding controlled amounts of gypsum and insoluble anhydrite to the grinding circuit or by blending ground hemihydrate and insoluble anhydrite to ground clinker.

REFERENCES:
patent: 3662830 (1972-05-01), Martin
patent: 3754953 (1973-08-01), Martin
patent: 3864141 (1975-02-01), Uchikawa et al.
patent: 3867163 (1975-02-01), Uchikawa et al.

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