Derrick Removal Case Study

13th March 2024


The Platform Operator are a long term client of DSL’s where we regularly complete asset integrity and drilling structure scopes.
The removal scope came from the Projects Team who knew that DSL had a comprehensive Track Record in removing drilling structures utilizing the
Floating Pole methodology, mitigating the need for costly HLVs.


  • Completing a comprehensive Engineering
    analysis to ensure structure Integrity is
    maintained and proven throughout the
    dismantling Phase.
  • Weather challenges and having enough fall-back
    work to complete during WAH downtime.
  • Close Proximity of the Platform Flare to the
    drilling structure


  • Install dedicated Tuggers on the Drill floor
  • Remove Derrick Ancillary Equipment Using Tuggers
  • Assemble and Install Floating Pole in the Derrick
  • Load Test Floating Pole Assembly
  • Remove gin pole utilising Floating Pole Assembly
  • Commence removal of Derrick sections utilising Floating Pole
    Assembly from gin pole down to level 5 (top of derrick v-doors).
  • Removal and disassembly of Floating Pole Assembly
  • Removal of Derrick Stem from Level 5 to Drill Floor utilising
    Platform Crane.
  • Removal of all Drilling Equipment from the Drill floor
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