Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Rheology of foamed cement
Foams are being used in a number of petroleum industry applications that exploit their high viscosity and low density. Foamed cement slurries can have superior displacement properties relative to non-foamed cement slurries. This article presents results of an experimental study of foamed cement rheology. Viscosity curves of foamed cements were obtained using a flow-through rotational viscometer. Foamed cements with different foam qualities were generated under different pressures using a foam generator/viscometer apparatus. The foam qualities during the tests ranged from 0% to 30%, and the shear rate varied between 5 s- 1 and 600 s- 1. Experimental results indicate that: i) unlike conventional aqueous foams, low-quality cement foams have a lower viscosity than the base fluid; ii) as the cement foam quality (gas volumetric fraction) increases from 10% to 30%, the viscosity also increases; and iii) the viscosity of low-quality cement foam slightly increases after depressurization or expansion.
Rheology of foamed cement
Foams are being used in a number of petroleum industry applications that exploit their high viscosity and low density. Foamed cement slurries can have superior displacement properties relative to non-foamed cement slurries. This article presents results of an experimental study of foamed cement rheology. Viscosity curves of foamed cements were obtained using a flow-through rotational viscometer. Foamed cements with different foam qualities were generated under different pressures using a foam generator/viscometer apparatus. The foam qualities during the tests ranged from 0% to 30%, and the shear rate varied between 5 s- 1 and 600 s- 1. Experimental results indicate that: i) unlike conventional aqueous foams, low-quality cement foams have a lower viscosity than the base fluid; ii) as the cement foam quality (gas volumetric fraction) increases from 10% to 30%, the viscosity also increases; and iii) the viscosity of low-quality cement foam slightly increases after depressurization or expansion.
Rheology of foamed cement
Ahmed, R.M. (Autor:in) / Takach, N.E. (Autor:in) / Khan, U.M. (Autor:in) / Taoutaou, S. (Autor:in) / James, S. (Autor:in) / Saasen, A. (Autor:in) / Godöy, R. (Autor:in)
Cement and Concrete Research ; 39 ; 353-361
2009
9 Seiten, 30 Quellen
Aufsatz (Zeitschrift)
Englisch
Bohrlochzementierung , Druckentlastung , Elastizität , Erdölbohrung , Erdölförderung , experimentelle Untersuchung , Gießschlicker , Plastizität , Rheologie , Rotationsviskosimeter , Schaumbeton , Schäumen , Schaumwerkstoff , Scherbeanspruchung , Scherviskosität , Viskositätsmessung , Zementpaste , Schergeschwindigkeit
| Online Contents | 2009
| Online Contents | 2009
| British Library Online Contents | 2009
| Elsevier | 2008