Trisha Shetty (Editor)

Rack phase difference

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Rack Phase Difference (RPD) is a difference in the elevation between rack teeth of the chords of any single leg of a jackup rig. This relative displacement creates an additional load on the leg members, which may results in failure of structure members in case RPD reaches more than the allowable value.

Contents

Reasons

  1. Eccentricity of Spudcan centre due to uneven ground condition.
  2. Sliding of leg

Terminology

  • Spudcan - the foot on a leg of a jack-up type oil platform.

    • References

    Rack phase difference Wikipedia
    (Text) CC BY-SA