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H YDRAULIC C ALCULATIONS
Well Name: Name: ??? Location:: ???? Location
Rig:: ??? Rig
Well M.T.D. ft Well T.V.D. ft Hole (Bit) Size in Surface Equipment Type Pump Liner Size in Pump Speed strokes /min /min Size of Pump Rod in Pump Stroke Length in Working Pumps Number Max Operating Press psi
7200 6000 7 7/8 1 5 110 0 12 1 pump 3000
Total Nozzle Nozzle Area Area TFA TFA in in2 Surface Press. Losses psi Stand Pipe Pressure psi Minimum Mud Pump HP Buoyancy Factor Available WOB WOB klbs
0.3313 96 1864 366 0.847 43.67
Date:: 99-10-22 Date
Last Csg TD Set ft Csg ID in Drill Pipe O.D. in Drill Pipe I.D. in H.Wt. D.Pipe Length ft H.Wt. Drill Pipe O.D. in H.Wt. Drill Pipe I.D. in H.Wt. D.P. Mass Lbs / /ft ft Drill Collars Length ft Drill Collar O.D. in Drill Collar I.D. in
409 25 10.00 50 30 16 3 Desilter / / Desander Desander Input Input Suction Rate bbl / /min min 8.00 Underflow Density ppg 15.00 n er ow a e gpm 12.00
Mud Tanks Volume BBLs ROP ft /hr /hr Mud Density ppg Fan RPM 600 Fan RPM 300 Fan RPM 100 Fan RPM 3
Lag Time Calculation Input S. Gravity of Cuttings 2.6 Thickness of Cuttings in 2/16 Width of Cuttings in 2/16 Jet / Jet / Nozzle Size Input in 32 32s s Nozzle Nozzle Nozzle Nozzle Nozzle
12 12
1, 2 3, 4 5, 6 7, 8 9,10
12
11,,12 Nozzle 11
BUOYANCY, WOB & & B BIT H YDRAULICS Bit Hydraulic HP 2
Bit HHP per in or HSI Bit Pressure Drop psi Bit Pressure Drop Fr. % Jet Impact force, lbf Nozzle Velocity ft /sec /sec
185 3.80 943 50.6 566 325
JET SELECTION 2
Recommended TFA TFA to to maximize HHP in 2 Recommended TFA TFA to to maximize Impact Force in 2 Optimum TFA TFA for for Maximum HHP & & Impact Impact Force in
0.2314 0.2693 0.2503
Nozzle Sz
10/10/10 11/11/10 10/11/10
VOLUMES, V OLUMES, PRESSURES & & H HOLE CLEANING Pump Output bbl / /stroke stroke or g / /stroke stroke 0.073 3.06 Pump Output bbl / /min min or gpm 336.60 Mud to reach the bit 8.01 Average Annular Mud Velocity ft /min /min Bottoms up ( Annular Annular Volume) Volume) 193 Average Velocity of Cuttings ft /min /min From Suction to Surface (Hole Hole Volume Volume)) 140 Est. Mud to displace String for POOH bbl Total Circulation (total ( total mud system) system ) 57 Minimum Trip Margin to POOH kPa 68 Effective Circulating Mud Density (Mud Wt. + Ann. Press Losses) ppg 10.22 Maximum ROP for a 4% by volume Cutting Concentration ft /hr /hr 232 The present Cutting Concentration in the Annulus is (by volume) volume) % 0.43
gallons Volume BBLs
3973 12552 16525 33703
95.17 298.86 393.46 802.46
Time (min (min))
Strokes
11.8 37.3 49.1 100 51
1298 4102 5400 11014 5653
Bottom Sample Up Total Hole Volume (no (no Pipe in) in) bbl Mud Pressure Gradient psi / /ft ft Hydrostatic Pressure (pump (pump off ) at TVD psi
at this ROP the Effective Mud Density in the Annulus (without the pressure losses) becomes ppg and the Effective Circulating Mud Density with the above Cuttings Concentration becomes ppg
10.05 10.27
Increase in BHP by psi
450 0.520 3120 3204 84
9.815 P.V. Cps 2 17.143 Y .P.Lb / /100ft 100ft
20 10
Eff.H.Press (drilling drilling)) psi
SOLIDS R EMOVAL, EMOVAL, DESILTER or DESANDER Overflow Mud Density ppg ver ow a e mn
9.815 7.714
Solids Volume Removed bbl / /hr hr o s as ass emove s r
7.328 6678
Mud Removed bbl / /hr hr n er ow a e r
C APACITIES, APACITIES, V VELOCITIES, ELOCITIES, R HEOLOGIES HEOLOGIES and PRESSURE LOSSES Per SECTION np na K p K a
Capacities in gal / /ft ft Capacities in bbl / /ft ft Section Capacity in gal Section Capacity in bbl Mud Velocity ft /min /min Mud Velocity ft /sec /sec Critical Velocity ft /min /min Critical Velocity ft /sec /sec Critical Flow Rate gpm Slip Velocity ft /min /min Velocity of Cuttings Cuttings ft /min /min Transport Efficiency % Lag (Transport) Time min Effective Viscosity m cps
flow type Turbulent Friction Factor 0.0052 Pressure Drop psi 177
