Page 139 - Formulas and Calculations for Petroleum Engineering

132 Formulas and calculations for petroleum engineering

Output(s)

mw max : Max Allowable Mud wt (ppg)

Formula(s)

P
mw ¼ l + mw
max
0:052 tvd
Reference: Formulas and Calculations for Drilling, Production and Workover, Second Edition, Lapeyrouse, Page: 120.

2.135 Maximum drilling rate—Larger holes
Input(s)

MW o : Mud Weight out (ppg)
MW i : Mud Weight in (ppg)
q c : Circulation Rate (gpm)
D h : Hole Size (in.)

Output(s)

MDR: Maximum Drilling Rate (ft/h)

Formula(s)

67 MW MW Þ q c
ð
i
o
MDR ¼ 2
D
h
Reference: Lapeyrouse, N. J., 2002, Formulas and Calculations for Drilling, Production and Workover, Second Edition,
Gulf Professional Publishing, Page: 19.

2.136 Maximum equivalent derrick load
Input(s)

F h : Load Hoisted (lb)
n: No. of Lines Strung Between Crown Block and Traveling Block (unitless)

Output(s)

F de : Maximum Equivalent Derrick Load (lb)

Formula(s)

n+ 4
F ¼ F
de h
n
Reference: Samuel. E Robello. 501 Solved Problems and Calculations for Drilling Operations. Sigma Quadrant. 2015.
Houston, Texas, Page: 11.