000			01905nab a2200205 4500
005			20260520002033.0
008			260224s2011 xxu
245	0	0	_aFriction factors for hydraulic calculations considering presence of cuttings and pipe rotation in horizontal / highly-inclined wellbores
260			_a _b _cagos. 2011
270			_a04/04/2012 ; 04/04/2012
300			_a8 p. ; 407 - 414
520			_aTranscripción del resumen del autor. Pressure loss calculations have a vital role for determining hydraulic horsepower requirements and to predict bottomhole treating pressure. One of the major concerns in developing hydraulic programs is to estimate the frictional pressure losses while cuttings are present in the annulus during pipe rotation. An experimental work has been carried out in a cuttings transport flow loop capable of operating at various inclinations. The pressure drop in the test section was recorded for variable flow rates, cuttings concentrations, pipe inclinations and rotation speeds. Existence of cuttings increase the pressure drop due to decrease in flow area inside the wellbore. As there are cuttings in the system, pipe rotation decreases the frictional pressure loss considerably in particular if the pipe is making an orbital motion in the eccentric annulus. Cuttings bed thickness defined as the ratio of cuttings bed area to the wellbore area is expressed in terms of dimensionless parameters obtained from dimensional analysis. Empirical expressions and charts for friction factor are proposed for low and high viscosity fluids in terms of combined Reynolds number and stationary cuttings bed thickness.
581			_a2
773	0		_tJournal of Petroleum Science & Engineering _g78
942			_cARTICULO
100	1		_aSorgun, Mehmet _952360
100	1		_aAydin, Ismail _952361
100	1		_aOzbayoglu, M.E. _936117
999			_c187005 _d187005