Page 135 - Formulas and Calculations for Petroleum Engineering

128 Formulas and calculations for petroleum engineering

Output(s)

KWM: Kill Weight Mud (ppg)

Formula(s)

SIDPP
ð
KWM ¼ + OMWÞ
0:052 TVDÞ
ð
Reference: Lapeyrouse, N. J., 2002, Formulas and Calculations for Drilling, Production and Workover, Second Edition,
Gulf Professional Publishing, Page: 131.

2.125 Kinetic friction
Input(s)

m s : Static Viscosity (cP)
a: Constant of Friction in X Direction (dimensionless)
2
g: Acceleration Due to Gravity (ft/s )

Output(s)

j: Angle of Friction (rad)
m k : Kinetic Viscosity (cP)

Formula(s)

j ¼ tan mðÞ
s

a
m ¼ m
k
s
g sin jðÞ
Reference: Samuel. E Robello. 501 Solved Problems and Calculations for Drilling Operations. Sigma Quadrant. 2015.
Houston, Texas, Page: 375.

2.126 Laser specific energy

Input(s)
2
P: Power intensity (w/ft )
t: Time (s)
T: Thermal Penetration Depth (ft)

Output(s)
LSE: Laser Specific Energy (W s/ft)

Formula(s)

P t
LSE ¼
T

Reference: Samuel. E Robello. 501 Solved Problems and Calculations for Drilling Operations. Sigma Quadrant. 2015.
Houston, Texas, Page: 415.