Presenters
Victoria Pons-Ehimeakhe
Weatherford
Currently downhole cards can be computed from surface cards by solving the one dimensional damped wave equation with finite differences and an iteration on the damping factor or dual iteration on the damping factors. The one dimensional damped wave equation only takes into consideration friction of a viscous nature and ignores any type of mechanical friction. However, when dealing with a deviated or horizontal well, the mechanical friction in between the rods, couplings and tubing is no longer negligible. In this paper, the modified Everitt-Jennings code is further extended to incorporate mechanical friction and accommodate deviated wells