Table 1 Calculating fundamental data for downhole string buckling and ECD in well X.
Parameter | Value |
|---|---|
Wellhead temperature | 30℃ |
Geothermal gradient | 4.0℃/100m |
Seawater depth | 80 m |
Circulation time | 30 min |
Drill bit diameter | 212.73 mm |
Drill pipe OD | 139.7 mm |
Drill pipe ID | 121.36 mm |
Drill collar length | 200 m |
Drill collar OD | 165.1 mm |
Drill collar ID | 121.36 mm |
Booster pump displacement | 2300 L/min |
Conductivity coefficient of drilling fluid | 1.45 W/(m⋅℃) |
Heat capacity of drilling fluid | 2000 J/(kg⋅℃) |
