1. Determine the collapse pressure regime for 11 3/4", grade K-55 and thickness 0.723 inch.(1.5marks) 2. A vertical separator has ID of 36" and handles liquid of 1500 BPD .

Following is the oil and gas data feeding the separator (2.5 marks) Gas Density: 4.0 lbm/ft³ MW: 20 lb/mol Gas Molar Volume: 379.5 scf/mole Sp.g of oil =44Ibm/cubic feet K factor= 0.32 ft/sec Calculate the liquid capacity of the separator in (bbl/hour) when retention time is 6 minutes,and liquid volume 22bbl.