Page 115 - Formulas and Calculations for Petroleum Engineering

108 Formulas and calculations for petroleum engineering

Formula(s)

F v t
h
E ¼
F v
f f
Reference: Samuel. E Robello. 501 Solved Problems and Calculations for Drilling Operations. Sigma Quadrant. 2015.
Houston, Texas, Page: 10.

2.77 Equivalent area of pipe subject to uniform axial force
Input(s)

2
A b : Area of Body ( in. )
2
A j : Area of Joint ( in. )
a: Length Factor for Pipe Body (fraction)

Output(s)
2
A p :Area of Pipe ( in. )

Formula(s)

A A
b j
A ¼
p
a A 1 að Þ A
b j
Reference: Samuel. E Robello. 501 Solved Problems and Calculations for Drilling Operations. Sigma Quadrant. 2015.
Houston, Texas, Page: 44.

2.78 Equivalent circulating density
Input(s)

r m : Mud Weight (ppg)
dP a : Annulus Pressure Loss (psi)
L t : True Vertical Depth (ft)

Output(s)
ECD: Equivalent Circulating Density (ppg) (ppg)

Formula(s)

dP a
ECD ¼ r +
m
0:052 L
t
Reference: Samuel. E Robello. 501 Solved Problems and Calculations for Drilling Operations. Sigma Quadrant. 2015.
Houston, Texas, Page: 258.