Page 124 - Formulas and Calculations for Petroleum Engineering

Drilling engineering formulas and calculations Chapter 2 117

Formula(s)

q P
HHP ¼
1714

Reference: Samuel. E Robello. 501 Solved Problems and Calculations for Drilling Operations. Sigma Quadrant. 2015.
Houston, Texas, Page: 46.

2.98 Hydraulics analysis

Input(s)
N 1 : Jet Size for nozzle 1 (in.)
N 2 : Jet Size for nozzle 2 (in.)
N 3 : Jet Sizefor nozzle 3 (in.)
Q: Circulation Rate (gpm)
Dh: Diameter of Hole (in.)
Dp: Dia of Drill Pipe (in.)
MW: Mud Weight (psi)
B: Bit Size (in.)
P s : Surface pressure (psi)

Output(s)
AV: Annular Velocity (ft/min)
Pb: Bit Nozzle Pressure Loss (psi)
HHP: Hydraulic Horsepower at bit (hp)
2
HHPba: Power per unit area in sq inc (hp/in. )
P psib : Percentage pressure loss at bit (percent)
V n : Jet Velocity (ft/s)
2
IFa: Impact force per unit area in sq inc (lb/in. )

Formula(s)

Q
AV ¼ 24:5
2
Dh Dp 2
MW
2
Pb ¼ 156:5 Q
2 2 2 2
N + N + N
1 2 3
Q
HHP ¼ P
s
1714
1:27
HHPba ¼ Q Pb
1714 B 2
100
P ¼ Pb
psib
P
s
Q
V ¼ 417:2
n 2 2 2
N + N + N
1 2 3
1:27
IFa ¼ MW V Q
n
1930 B 2
Reference: Formulas and Calculations for Drilling, Production and Workover, Second Edition, Lapeyrouse, Page: 170.