(20 points) It is desired the estimate the proper pump operating conditions and bit nozzle sizes...

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(20 points) It is desired the estimate the proper pump operating conditions and bit nozzle sizes for maximum bit horsepower at 1000-ft increments for an interval of the well between surface casing at 2000 ft and intermediate casing at 6000 ft. The well plan calls for the following conditions. Mud Density Plastic Viscosity Pressure (P), psi Pump horsepower, hp: 1200 Maximum pump pressure, psig: 3000 Drillpipe, (OD x ID), in: 5 x 4.3 Hole size (washed out), in: 10 Surface equipment (equivalent to drillpipe), ft: 200 10000 1000 100 Depth ft 6000 100 Ibm/gal 10 p-q test chart Flow rate (q), gal/min ср 15 Yield Point lbf/100 sq ft 10 Pump efficiency: 0.95 Minimum annular velocity, ft/sec: 2 Drill collars (8 x 3 in), ft: 700 Casing ID, in.: 10 1000 (20 points) It is desired the estimate the proper pump operating conditions and bit nozzle sizes for maximum bit horsepower at 1000-ft increments for an interval of the well between surface casing at 2000 ft and intermediate casing at 6000 ft. The well plan calls for the following conditions. Mud Density Plastic Viscosity Pressure (P), psi Pump horsepower, hp: 1200 Maximum pump pressure, psig: 3000 Drillpipe, (OD x ID), in: 5 x 4.3 Hole size (washed out), in: 10 Surface equipment (equivalent to drillpipe), ft: 200 10000 1000 100 Depth ft 6000 100 Ibm/gal 10 p-q test chart Flow rate (q), gal/min ср 15 Yield Point lbf/100 sq ft 10 Pump efficiency: 0.95 Minimum annular velocity, ft/sec: 2 Drill collars (8 x 3 in), ft: 700 Casing ID, in.: 10 1000

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