The differential equation for the frictional resistance on the drillstring during tripping in high-deviated holes and horizontal holes was established.

 
  • 建立了大斜度定向井及水平井起下鉆過(guò)程中鉆柱摩擦阻力微分方程,并推導得到鉆柱摩阻的解析解。
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