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MUNThesis.pdf
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🔗 Source: research.library.mun.ca
📊 Size: 12.94 MB
📄 Pages: 123 pages
⬇️ Downloads: 83

Summary

Drill-strings are slender structures used to dig into rock in search of oil and gas, and their failures are time and money consuming. A dynamic model of the drill-string is built using Euler-Bernoulli beam theory to predict axial, torsional, and lateral vibrations. The model is subjected to distributed loads due to its own weight and bit/formation interaction, and is driven by a DC motor on the top. The thesis investigates the dynamics of drill-strings under deterministic and random excitations, capturing stick-slip behavior and its negative effect on drilling performance. A finite element model is developed to analyze torsional vibration and stick-slip behavior, and Monte Carlo simulation is used to obtain the statistics of the response under random excitations.

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Description

Drill-strings are slender structures used to dig into rock in search of oil and gas, and their failures are time and money consuming.

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  • File Format: PDF
  • File Size: 12.94 MB
  • Pages: 123
  • Language: EN
  • Total Downloads: 83
  • Last Updated: 3 hours ago

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