The Strength of the Drill Pipe for the Offshore Drilling

  • N. Tsukada
Conference paper


The study aims to clarify the influence of deformation of drill pipe inside the raiser pipe due to axial load and torque for the off-shore boring technique To estimate the deformation of practical pipe of alternately stepped cross sections jointed with screwed thread’s fittings is so trouble-some that the ideal equivalent pipe with uniform cross section is introduced. The deformation of this ideal equivalent pipe is discussed. The most important points of this problem are made a proposal to predict the ideal equivalent pipe with sufficient effects of the drill pipe with alternately stepped cross sections in practical use.


Axial Load Torsional Rigidity Drill Pipe Uniform Cross Section Cross Sectional Pipe 
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Copyright information

© Springer-Verlag Tokyo 1985

Authors and Affiliations

  • N. Tsukada
    • 1
  1. 1.Department of Mechanical Engineering, College of Industrial TechnologyNihon UniversityNarashino, Chiba, 275Japan

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