G1 continuous bifurcating and multi-bifurcating surface generation with B-splines

Asthana, Varun; Bhatt, Amba D.

doi:10.1080/16864360.2016.1199759

Cited by 2 publications

(1 citation statement)

References 8 publications

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“…The angle and depth (Φ x and L x , respectively) of each point in the homogenized point set are known quantities, and only interpolation is needed for the well diameter R x . The T-spline, B-spline, Kriging, and other methods are used to study the advantages and disadvantages of spatial point interpolation [16][17][18][19][20], but in terms of the cylindrical shape interpolation and computational efficiency, the inverse distance weighted interpolation has good properties [21][22][23]. In this study, the surface inverse distance weighted spatial interpolation method was used to determine the value of the well diameter on the homogeneous helix.…”

Section: Iterative Cylindrical Space Surface Inverse Distance Interpomentioning

confidence: 99%

Method of Real-Time Wellbore Surface Reconstruction Based on Spiral Contour

Wang

2021

Energies

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A wellbore surface is an irregular surface structure. The distribution of points on the wellbore surface measured based on the drilling diameter is not uniform. Thus, the conventional modeling method based on a point cloud cannot satisfy the needs of real-time measurement updating and wellbore display. This study proposes a spiral profile method for drilling shaft surface reconstruction. Scattered data along the drilling diameter are measured, and an inverse distance weighting cylindrical space surface algorithm with iterative interpolation is used to obtain the spiral angle and pitch of a relatively homogeneous helical contour line along the surface of the shaft. Using sets of four adjacent points in the spiral, quadrilaterals are formed, and then all obtained quadrilaterals are used to form the wellbore inner surface structure. This method can further construct the outer surface spiral contour line to advance the quadrilateral surface to the spatial hexahedron structure. The caliper and gamma measurement data obtained from the calibrated wellbore were used to verify the real-time surface reconstruction and fusion while drilling. The homogenized reconstructed surface profile is more than 99.5% similar to the actual measurement. Proved by experiment and application, this method has very high real-time performance, and the three-dimensional stereo imaging wellbore with additional gamma attributes has good visual effects.

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