Ιδρυματικό Αποθετήριο [SANDBOX]
Πολυτεχνείο Κρήτης
EN  |  EL

Αναζήτηση

Πλοήγηση

Ο Χώρος μου

On the end-effect correction for Couette type oil-field direct-indicating viscometers for Newtonian and non-Newtonian fluids

Kelesidis Vasilis, Maglione R. , Bandelis G.

Πλήρης Εγγραφή


URI: http://purl.tuc.gr/dl/dias/E6ECD3D7-A868-48FF-9F85-5CCA77AD856A
Έτος 2010
Τύπος Δημοσίευση σε Περιοδικό με Κριτές
Άδεια Χρήσης
Λεπτομέρειες
Βιβλιογραφική Αναφορά V.C. Kelessidis, R. Maglione, G. Bandelis," On the end-effect correction for Couette type oil-field direct-indicating viscometers for Newtonian and non-Newtonian fluids," Journal of Petroleum Science and Engineering, vol. 71, no. 1-2, pp. 37–46, Mar. 2010. doi: 10.1016/j.petrol.2010.01.001 https://doi.org/10.1016/j.petrol.2010.01.001
Εμφανίζεται στις Συλλογές

Περίληψη

Analysis and experimental results are presented which quantify the magnitude of end-effects for direct-indicating, narrow gap, rotating cylinder viscometers used extensively in oil-field, for Newtonian and non-Newtonian fluids. Such viscometers have already embedded at manufacturing stage an end-effect correction and give directly the shear stress which does not allow end-effect quantification in a straight forward manner. The presented analysis resolves this problem by estimating the embedded correction, which has been determined as 6.69% of the torque developed along the cylindrical part of the stationary bob of this viscometer.Experimental results with Newtonian and non-Newtonian fluids show that there is no additional end-effect from the bottom of the stationary bob. However, there is additional end-effect contribution from the top section of the bob, which has not been taken into account in the design and manufacturing of the instrument. Its magnitude ranges from 5 to 6% for the Newtonian fluid and the high shear rate range for the non-Newtonian fluid, to 12% for the low shear rate range for the non-Newtonian fluid tested, while the impact on drilling situations is also discussed.

Υπηρεσίες

Στατιστικά