Page 147 - Formulas and Calculations for Petroleum Engineering

140 Formulas and calculations for petroleum engineering

Formula(s)

2
2
F +C +B 2
N ¼
a
1303:8
Reference: Lapeyrouse, N. J., 2002, Formulas and Calculations for Drilling, Production and Workover, Second Edition,
Gulf Professional Publishing, Page: 165.

2.156 Number of sacks of cement required

Input(s)
H: Hole Size (in.)
OD: Outer Dia (in.)
ID: Inner Dia (in.)
h c : Feet to be Cemented (ft)
E: Original+extra Volume Req in Percentage (fraction)
h fc : Feet Between Float Collar and Shoe (ft)
3
Y1: Yield of Lead/filler Cement (ft /stroke)
3
Y2: Yield of Tail Cement (ft /stroke)
FC: Float Collar (Number of Feet Above Shoe) (ft)
Csd: Casing Setting Depth (ft)
PO: Pump Output (bbl/stroke)

Output(s)
3
AC: Annular Capacity (ft3/ft) C:Casing Capacity (ft /ft)
N f : Number of Sacks of Cement Required (stroke)
N a : Sacks Required for Annulus (stroke)
N c : Sacks Required for Casing (stroke)
N t : Total Number of Sacks Required (stroke)
Cd: Casing Capacity in Barrels (bbl/ft)
SS: Number of Strokes Required to Bump the Plug (strokes)

Formula(s)

2
H OD 2
AC ¼
183:35
2
ð IDÞ
C ¼
183:35
h AC E
c
N ¼
f
Y1
E
N ¼ h AC
a c
Y2
C
N ¼ h
c fc
Y2
N ¼ N +N c
t
a
2
ð IDÞ
Cd ¼
1029:4
Cd
SS ¼
PO
Reference: Lapeyrouse, N. J., 2002, Formulas and Calculations for Drilling, Production and Workover, Second Edition,
Gulf Professional Publishing, Page: 54.