Page 87 - Formulas and Calculations for Petroleum Engineering

80 Formulas and calculations for petroleum engineering

Output(s)

F c : Critical Axial Load (lbm)
C: Crushing Factor (dimensionless)

Formula(s)

c
F ¼ C A s
1
# 1=2
C ¼ "
2
rK rK
1+ +
L L
Reference: Suman Jr, G. O., & Ellis, R. C. (1977). Cementing Handbook. World Oil, Page: 18.

2.17 Beam force
Input(s)

H: Significant Wave Height (ft)
B: Vessel Beam Length (ft)
L: Vessel Length (ft)
A: Wave Period (s)
D: Vessel Draft (ft)

Output(s)

5
F ba : Beam Force When a Is Greater Than 0.642 (b+2 d)0.5 ( ft /s)
*
*
5
F bb : Beam Force When a Is Lower Than 0.642 (b+2 d)0.5 ( ft /s)
*
*
Formula(s)
2
2
2:1 H Þ B Þ L
ð
ð
F ¼
ba 4
A
2
2
2:1 H Þ B Þ L
ð
ð
bb 4
F ¼
0:5
1:28 ð B +2 DÞ A
Reference: Samuel. E Robello. 501 Solved Problems and Calculations for Drilling Operations. Sigma Quadrant. 2015.
Houston, Texas, Page: 457.
2.18 Bit nozzle pressure loss
Input(s)
2
N a : Nozzle Area (in. )
Q: Flow Rate (gpm)
MW: Mud Weight (ppg)