Page 86 - Formulas and Calculations for Petroleum Engineering

Drilling engineering formulas and calculations Chapter 2 79

Formula(s)

2 2
0:7854 D D L
h
o
V ¼
a
808:5
Reference: Samuel. E Robello. 501 Solved Problems and Calculations for Drilling Operations. Sigma Quadrant. 2015.
Houston, Texas, Page: 44.

2.14 API water loss calculations
Input(s)
3
V a : Water Loss in 7.5 min (cm )
3
V sp : Spurt Loss (cm )

Output(s)
3
V 30 : Water Loss (cm )

Formula(s)

V ¼ 2 V Þ V
ð
30 a sp
Reference: Samuel. E Robello. 501 Solved Problems and Calculations for Drilling Operations. Sigma Quadrant. 2015.
Houston, Texas, Page: 199.

2.15 Area below the casing shoe

Input(s)
D c : Casing Diameter (in.)

Output(s)
2
A: Area Below Shoe (in. )

Formula(s)

2
A ¼ D 0:7854
c
Reference: Lapeyrouse, N. J., 2002, Formulas and Calculations for Drilling, Production and Workover, Second Edition,
Gulf Professional Publishing, Page: 67.

2.16 Axial loads in slips
Input(s)
2
A: Cross Sectional Area of the Pipe body (in. )
s: Yield Strength of the Casing (psi)
r: Outside Casing Radius (in.)
L: Slip Gripping Length (in.)
K: Transverse Load Factor (dimensionless)