Research Article
A New Method for Predicting the Position of Gas Influx Based on PRP in Drilling Operations
| Parameter | Value |
| The length of drill collar (m) | 200 | The length of drill pipe (m) | 3800 | Diameter of bit (m) | 0.2159 | Outside diameter of drill pipe (m) | 0.127 | Inside diameter of drill pipe (m) | 0.1086 | Outside diameter of drill collar (m) | 0.1778 | Inside diameter of drill collar (m) | 0.078 | Drill pipe roughness (m) | 0.0154 | Flow rate for mud pump (m3/s) | 0.037 | String elastic modulus (Pa) | 2.07 × 1011 | Drilling mud density (kg/m3) | 1460 | String Poisson's ratio | 0.3 | Drilling fluid compressibility (1/kPa) | 5.7 × 10−8 | Surface temperature (°C) | 25 | The ground atmospheric pressure (MPa) | 0.101 | The wall roughness (m) | 0.1 |
|
|