GEOG 4891 Lecture Notes - Lecture 11: Drilling Fluid, Blowout Preventer, Polyethylene Terephthalate
Document Summary
All activities in order to control kick and blow out during drilling is called well control. The very first tool of well control is fluid density control which is the control of drilling fluid (mud) hydrostatic pressure. Drilling fluid (mud) has two function in well control: to prevent any well kick, to kill the kick (if occurs) and regain the well control. The most commonly, drilling fluid is mud (but it can also be water, foam, air or gas). For 10000 ft depth and 10 ppg mud density: pm = (0. 052, psi/ft/ppg)*(10, ppg)*(10000, ft) = 5200 psi. The mud gradient (hydrostatic pressure per foot of mud column) can also be used for calculating hydrostatic pressure of mud (in the unit of psi per foot) by following formula: (mud gradient, psi/ft) = (0. 052 psi/ft/ppg)*( m, ppg) In this case: (hydrostatic pressure of mud, psi) = (mud gradient, psi/ft)*(depth, ft)
