Calculation Method Comparison on Drilling Trajectory Parameters ofSurface Ground Pre-Grouting Borehole
TIAN Qi
Abstract：The calculation of the drilling trajectory parameters would be one of the keys to success or failure of the directional grouting operation.There would be many calculation methods.The paper briefly introduced four calculation methods and principles of the most applied tangent method,cylinder helix method,calibrated average angle method and minimum curvature method.With the cases,an analysis comparison conducted on the calculation results and drilling trajectory curves of the different methods.The results showed that under the condition of the dense measuring points and small vertex angles,the calculation results of the different methods were fitted basically,the tangent method and minimum curvature method could accurately reflect the azimuth fast turning and the minimum curvature method would be more suitable to the directional drilling trajectory parameters calculation of the surface ground pre-grouting.
Keywords：calculation of drilling trajectory parameterstangent methodcylinder helix methodcalibrated average angle methodminimum curvature method
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 39-42 )