Quickly, though, industry has search for flow solutions covering non-Newtonian fluids (Willis et al., 1973 Zamora and Lord, 1974) with comprehensive assessment in the gospel of drilling engineering (Bourgoyne et al., 1991). Industry has studied drilling hydraulics ever since its inception and at first, Newtonian models have been used. This work aims at critically presenting advances made on these particular aspects in the past five year s pointing out resolutions to previous problems and As our understanding of the flow processes is still far from ideal, research has continued into the aspects of drilling hydraulics (Kelessidis et al., 2006 Founargiotakis et al., 2008 Scheid et al., 20 ) and the development of drilling fluid additives (Kok and Alikaya, 2005 Tehrani et al., 2009) as well as on the development of rheological models (Al-Zahrani, 1997 Nasiri and Ashrafizade, 2010) or the choice of the best model (Kok, 2004 Maglione and Kelessidis, 2006). These become particularly important in today’s difficult exploration and development environments of very deep wells, of high pressure and temperatures, and in situations of very deep or ultra-deep waters (Kelessidis, 2007). Accurate determination of pressure losses in the well circuit requires good representation of fluid rheology, based on field or laboratory measurements (Becker et al., 2003 Zamora et al., 2005). Drilling hydraulics is an essential part of drilling package enabling computation of pressure profiles along the wellbore and particularly in the annulus contributing to well safety and well integrity (Bourgoyne et al., 1991 Maglione et al., 1999 Bailey and Peden, 2000 Zamora and Roy, 2000) with considerable work to-date devoted on this subject (Ramadan and Miska, 2008 Ozbayoglu and Sorgun 2010) resulting in improvements of the API recommended practice for drilling fluid rheology and drilling hydraulics estimation (API 2006 Bern et al., 2007).
0 Comments
Leave a Reply. |