Research Article
Prediction Model of Mechanical Extending Limits in Horizontal Drilling and Design Methods of Tubular Strings to Improve Limits
Table 3
Values of the relevant parameters in a case study.
| | Parameters | Values |
| | Kick-off depth () | 2500 m | | Build-up rate () | 6°/30 m | | Inner diameter of wellbore () | 311 mm | | Outer diameter of tubular string () | 127 mm | | Rated pick-up force () | 3000 kN | | Rated torque () | 50 kN·m | | Threshold axial force for rock breaking () | 50 kN | | Threshold torque for rock breaking () | 5 kN·m |
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