Engineering Question
calculate the tail, lead and total slurry volume, displacement volume, water and additives requirements, differential hydrostatic pressure before releasing top plug, hydrostatic pressure in the annulus, and total job time for a 13.375 inches casing using the following data:
20” (ID=19.74”) shoe at 2000ft
16” hole to a depth of 6000ft
13.375” (ID=12.347”) shoe at 5980ft
TOC to be 500ft inside 20” casing shoe
Tail slurry to extend 500ft above the 13.375” shoe
The shoe track consists of 1 Joint (40ft)
30% excess and 11 ppg mud
Mixing and pumping rates are 10bbl/min
Lead slurry: class G cement + 0.3gal/stk extender +11. 35 gal/stk seawater, yield =1.99ft^3/stk density =13ppg
Tail slurry: class G cement + 0.05 gal/stk retarder + 0.05gal/stk+4.8 gal/stk fresh water, yield=1.13ft^3 /stk density = 13ppg
Ppg= lb/gal stk = stroke “ inches ID= inside diam
SAMPLE ASSIGNMENT
