Problem (15%) (CLOs 1 and 2) A drillstring is composed of drilling string of x bbl of Y-in. Z ben/ft drillpipe and I ft of drill collars having a X2 in L.D. and X3 in O.D. Determine: a) Length of the drillpipe (Hints: Table 1.5 in your textbook). b) Displacement of the drill pipe in bbl/ft (hints: mud displacement through BF calculation). c) Change in fluid level in a 4' x 4' trip tank; assume that the hole is filled from the trip tank after Botor pulling 2 stands of drill collars. it Problem II (30%) (CLOs 1 and 2) You are drilling at a current TD of 12,000' and just "topped the Granite Wash formation. If the Granite Wash is Normally Pressured, a) what is the Reservoir Pressure (at TD) and what is the minimum Mud Density required to maintain well control? The Drill String consists of a 7-7/8" bit on bottom, 900' of 6%"* 24", 83 PPF Drill Collars and 11,100' of 4'2", 16.6 PPF Drill Pipe with 3.826" ID. b) What's the pressure due to hydrostatic mud at TD? -) What's the difference is pressure? Is kick a possibility? The decision has been made to make a bit trip. Current TD is 12,000' with 9.2 PPG mud in the ole. 8-5/8", 24#, J55 Intermediate Casing (ID = 8.097") was set at 6,807'. Calculate the distance the fluid level may drop before a Kick occurs