Well cementing in permafrost

Details Well cementing in permafrost Well cementing in permafrost

1979-05-18

1980-08-05

Poer, James

Compositions: coating or plastic

Coating or plastic compositions

Proteinaceous material containing

C04B 732

Patent

active

042160227

ABSTRACT:
A composition for use in cementing a string of pipe or other apparatus in the permafrost region of a borehole of a well which composition is a dry cementitious mix which can be mixed with water on site for pumping into the wellbore and consists essentially of from about 40 to about 60 weight percent aluminate cement, from about 20 to about 30 weight percent alkaline earth metal sulfate, from about 10 to about 30 weight percent of at least one halide salt of an alkali metal and/or alkaline earth metal, from about 3 to about 8 weight percent attapulgite, from about 0.1 to about 1 weight percent of a mixture of at least one water soluble hydroxy carboxylic acid and a sulfoalkylated lignin, and from about 0.1 to about 1 weight percent of an alkali metal citrate.

REFERENCES:
patent: 2945539 (1960-07-01), Eilers
patent: 3922172 (1975-11-01), Crinkelmeyer et al.
patent: 4047567 (1977-09-01), Childs et al.
patent: 4082561 (1978-04-01), Nakagawa et al.

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