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OILFIELD UNITS
1. PRESSURE GRADIENT (psi/ft)
Mud Weight (ppg) x 0.052
2. HYDROSTATIC PRESSURE (psi)
Mud Weight (ppg) x 0.052 x TVD (ft)
3. FORMATION PRESSURE (psi)
Hydrostatic Pressure inDrillpipe (psi) + SIDPP (psi)
4. EQUIVALENT MUD WEIGHT (ppg)
Hydrostatic Pressure of Mud (psi)
TVD (ft) x 0.052
5. EQUIVALENT CIRCULATING DENSITY (ppg)
Mud Weight (ppg) + AnnularPressure Loss (psi)
0.052 x TVD (ft)
6. KICK TOLERANCE (ppg)
{MAASP (psi) - [Mud Weight (ppg) x 0.052 x Height of Influx (ft)]}
TVD (ft) x 0.052
7.MAXIMUM ALLOWABLE ANNULAR
SURFACE PRESSURE (psi)
LOT (psi) - [Mud Wt (ppg) - Mud WtLOT (ppg)] x 0.052 x TVDSHOE (ft)
8. MAXIMUM ALLOWABLE MUD WEIGHT (ppg)
Mud Weight (ppg) + Leak Off Pressure (psi)TVDSHOE (ft) x 0.052
9. NEW MAASP WITH KILL MUD WEIGHT (psi)
[Max. Allowable Mud Wt (ppg) - Kill Mud Wt (ppg)] x 0.052 x TVDSHOE (ft)
10. INITIAL CIRCULATINGPRESSURE (psi)
SCR or PL (psi) + SIDPP (psi)
11. FINAL CIRCULATING PRESSURE (psi)
SCR or PL (psi) x Kill Mud Weight (ppg)
Original Mud Weight (ppg)
12. KILL MUDWEIGHT (ppg)
SIDPP (psi) + Original Mud Weight (ppg)
TVD (ft) x 0.052
13. SHUT IN CASING PRESSURE (psi)
{[Mud Gradient (psi/ft) - Influx Gradient (psi/ft)]x Influx Height (ft)} + SIDPP(psi)
14. HEIGHT OF INFLUX ALONG HOLE (ft)
Kick Size (bbls)
Annular Volume (bbls/ft)
15. GRADIENT OF INFLUX (psi/ft)
[Mud Weight (ppg) x 0.052] - [SICP (psi) - SIDPP (psi)]Influx TVD Height (ft)
16. PUMP OUTPUT (bbls/min)
Liner Capacity (bbls/stk) x Pump Speed (spm)
17. ANNULAR VELOCITY (ft/min)
Pump Ouput (bbls/min)
Annular Volume(bbls/ft)
18. TRIP MARGIN/SAFETY FACTOR (ppg)
Mud Weight (ppg) + Safety Margin (psi)
TVD (ft) x 0.052
19. NEW PUMP PRESSURE WITH NEW PUMP STROKES (psi)...
1. PRESSURE GRADIENT (psi/ft)
Mud Weight (ppg) x 0.052
2. HYDROSTATIC PRESSURE (psi)
Mud Weight (ppg) x 0.052 x TVD (ft)
3. FORMATION PRESSURE (psi)
Hydrostatic Pressure inDrillpipe (psi) + SIDPP (psi)
4. EQUIVALENT MUD WEIGHT (ppg)
Hydrostatic Pressure of Mud (psi)
TVD (ft) x 0.052
5. EQUIVALENT CIRCULATING DENSITY (ppg)
Mud Weight (ppg) + AnnularPressure Loss (psi)
0.052 x TVD (ft)
6. KICK TOLERANCE (ppg)
{MAASP (psi) - [Mud Weight (ppg) x 0.052 x Height of Influx (ft)]}
TVD (ft) x 0.052
7.MAXIMUM ALLOWABLE ANNULAR
SURFACE PRESSURE (psi)
LOT (psi) - [Mud Wt (ppg) - Mud WtLOT (ppg)] x 0.052 x TVDSHOE (ft)
8. MAXIMUM ALLOWABLE MUD WEIGHT (ppg)
Mud Weight (ppg) + Leak Off Pressure (psi)TVDSHOE (ft) x 0.052
9. NEW MAASP WITH KILL MUD WEIGHT (psi)
[Max. Allowable Mud Wt (ppg) - Kill Mud Wt (ppg)] x 0.052 x TVDSHOE (ft)
10. INITIAL CIRCULATINGPRESSURE (psi)
SCR or PL (psi) + SIDPP (psi)
11. FINAL CIRCULATING PRESSURE (psi)
SCR or PL (psi) x Kill Mud Weight (ppg)
Original Mud Weight (ppg)
12. KILL MUDWEIGHT (ppg)
SIDPP (psi) + Original Mud Weight (ppg)
TVD (ft) x 0.052
13. SHUT IN CASING PRESSURE (psi)
{[Mud Gradient (psi/ft) - Influx Gradient (psi/ft)]x Influx Height (ft)} + SIDPP(psi)
14. HEIGHT OF INFLUX ALONG HOLE (ft)
Kick Size (bbls)
Annular Volume (bbls/ft)
15. GRADIENT OF INFLUX (psi/ft)
[Mud Weight (ppg) x 0.052] - [SICP (psi) - SIDPP (psi)]Influx TVD Height (ft)
16. PUMP OUTPUT (bbls/min)
Liner Capacity (bbls/stk) x Pump Speed (spm)
17. ANNULAR VELOCITY (ft/min)
Pump Ouput (bbls/min)
Annular Volume(bbls/ft)
18. TRIP MARGIN/SAFETY FACTOR (ppg)
Mud Weight (ppg) + Safety Margin (psi)
TVD (ft) x 0.052
19. NEW PUMP PRESSURE WITH NEW PUMP STROKES (psi)...
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