Curve-fitting equation for prediction of the start-up stress overshoot of an oil-based drilling fluid
العنوان: | Curve-fitting equation for prediction of the start-up stress overshoot of an oil-based drilling fluid |
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المؤلفون: | Tainan Gabardo Miranda dos Santos, Ana C. B. da Cruz, Emanuel Vitor Ceccon, Rubens Rosario Fernandes, Admilson T. Franco, Cezar O.R. Negrão, Diogo E. V. Andrade |
المصدر: | Journal of Petroleum Science and Engineering. 146:902-908 |
بيانات النشر: | Elsevier BV, 2016. |
سنة النشر: | 2016 |
مصطلحات موضوعية: | Engineering, 010304 chemical physics, business.industry, 02 engineering and technology, Geotechnical Engineering and Engineering Geology, Kinetic energy, 01 natural sciences, Shear rate, Algebraic equation, Fuel Technology, 020401 chemical engineering, Shear (geology), Drilling fluid, 0103 physical sciences, Shear stress, Curve fitting, Drill bit, Geotechnical engineering, 0204 chemical engineering, business |
الوصف: | Drilling fluids usually gel at rest in order to avoid cuttings to precipitate over the drill bit when circulation is interrupted. At flow start-ups, pumping pressures higher than the steady-state circulation pressure are usually required to surpass the gel strength. The gel-liquid transition may have significant importance, especially in ultra-deep waters where high pressures and low temperatures take place. In the current work, controlled shear rate rheometric tests were conducted to investigate the yielding of an oil based drilling fluid. An algebraic equation, that accounts for both shear rate and shear history, is proposed to predict the gel breaking. This equation requires less fitting parameters than the current structural kinetic models available in literature, and is quite useful to represent the pressure peaks that take place during drilling fluid flow start-ups. The equation fit to rheometric data and is able to predict satisfactorily the start-up shear stress of a gelled drilling fluid at different shear rates. |
تدمد: | 0920-4105 |
URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::2d0ecd4f48d47d5d4d1d8a1656120729 https://doi.org/10.1016/j.petrol.2016.07.037 |
حقوق: | CLOSED |
رقم الأكسشن: | edsair.doi...........2d0ecd4f48d47d5d4d1d8a1656120729 |
قاعدة البيانات: | OpenAIRE |
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