TY  - SER
AU  - Klyusov,Anatoly A.
AU  - Klyusov,Vsevolod A.
TI  - Compressible cement compositions improve isolation
KW  - Aditivos para fluidos de perforación
KW  - Aditivos para cementos
N1  - An inexpensive cement additive has proven highly effective over many years and wells in preventing fluid migration, even in Russia's geologically difficult fields
ER  -