Page 148 - Formulas and Calculations for Petroleum Engineering
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Drilling engineering formulas and calculations Chapter 2 141
2.157 Number of sacks of cement required for a given length of plug
Input(s)
L p : Plug Length (ft)
3
C c : Casing Capacity (ft /ft)
E: Excess Volume (fraction)
3
Y: Slurry Yield (ft /stroke)
Output(s)
N s : Sacks of Cement Required (unitless)
Formula(s)
L C E
c
p
N ¼
s
Y
Reference: Lapeyrouse, N. J., 2002, Formulas and Calculations for Drilling, Production and Workover, Second Edition,
Gulf Professional Publishing, Page: 61.
2.158 Number of sacks of lead cement required for annulus
Input(s)
L c : Feet to be Cemented (ft)
3
C a : Annular Capacity (ft /ft)
E: Excess Volume (fraction)
3
Y: Slurry Yield of Lead Cement (ft /stroke)
Output(s)
N s : Sacks Required (unitless)
Formula(s)
L C E
a
c
N ¼
s
Y
Reference: Lapeyrouse, N. J., 2002, Formulas and Calculations for Drilling, Production and Workover, Second Edition,
Gulf Professional Publishing, Page: 54.
2.159 Number of sacks of tail cement required for casing
Input(s)
L c : Distance between Float Collar and Shoe (ft)
3
C c : Casing Capacity (ft /ft)
3
Y: Slurry Yield of Tail Cement (ft /stroke)
Output(s)
N s : Sacks Required by Casing (unitless)
