Petroleum engineering

1. Calculate the pressure drop over 9,450ft of tubing that is being produced 787bbl/day of 24API,2.1 cp oil through 27/8-in., 8.6- lbm/ft ID: 2.259-in in a well that is 6 degrees from vertical. The tubing wall relative roughness is 0.001, assuming no free gas in tubing string. 2. Calculate the bottomhole pressure for the injection of 1,023bbl/d of brine with a density of 1.02g/cm3 and a viscosity of 1.03cp in a 9,480-ft vertical having a surface pressure of 185psi and (a) 2-in., 3.4lbm/ft ID:1.75-in tubing; (b) 2 7/8-in., 8.6- lbm/ID : 2.259-in ft tubing; (c) 31/2-in., 12.70- lbm/ft ID:2.75in. tubing