Open Access
Table 6
Basic parameters for downhole tool dynamic analysis.
| Parameter name | Value |
|---|---|
| Liquid dynamic viscosity (µ) | 0.01 Pa s |
| Formation pressure gradient | 0.96 MPa/100 m |
| Oil column yield strength limit (σs ) | 758 MPa |
| External diameter of oil pipe column | 88.9 mm |
| Internal diameter of oil pipe column | 76 mm |
| Total number of oil column units | 100 |
| Elastic modulus (Ε) | 2.06 × 1011 Pa |
| Pipe density (ρ) | 7846 kg/m3 |
| Total calculation time of model | 80 s |
| Step length | 0.001 s |
| Spring stiffness coefficient for a single shock absorber (k) | 200 N/mm |
| Shock absorber damping coefficient (c) | 20 N s/mm |
| Shock absorber mass | 100 kg |
| External diameter of the perforation gun | 73 mm |
| Internal diameter of the perforation gun | 62 mm |
| Perforation gun length | 3.3 m |
| Number of perforation gun dividing units | 10 |
| Charge amount | 128 g |
| Distance to explosive center | 0.2 m |
| Hydrostatic pressure | 34.4 MPa |
| Critical strength factor for casing | 98.9 MPa |
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