Currently, the determination of the strength properties of the cement stone is carried out in accordance with the methodology established by GOST 26798.1-96, which provides for testing samples of regular rectangular shape, where normal stresses are the main characteristic that determines the strength of the material. This indicator cannot fully characterize the resistance of the cement stone to be fractured in the downhole conditions. The technique presented in the standard does not take into account the tangential (circumferential, radial) stresses that occur in the annulus during technological operations. These circumstances require the development of the special research methods, as well as auxiliary equipment, which makes it possible to adequately assess the ability of a cement stone to resist emerging stresses under conditions of all-around compression.
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F.A. Agzamov, DSc (Engineering), Professor, Department of Oil and Gas Wells Drilling, Ufa State Petroleum Technological University
F.А. Agzamov, А.О. Belousov, Y.K. Komlev Opredelenie dinamicheskoj prochnosti cementnogo kamnya v usloviyah blizkih k vsestoronnemu szhatiyu [Determination of the cement stone dynamic strength under close to an all-around compression conditions]. Neftyanaya Provintsiya, No. 1(21), 2020. pp. 83-96. DOI https://doi.org/10.25689/NP.2020.1.83-96 (in Russian)