Derrick Removal Case Study

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.

CHALLENGES

• 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

Work-scope

• 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