The Challenge:
CCI own a Hydraulic Workover Unit (HWU) which they deploy offshore onto production platforms for cost effective down-hole intervention. Upcoming onshore contracts required an Onshore Support Base to be designed & fabricated to support the HWU on land over the well head.
The Solution:
Cube Offshore were engaged to develop the concept and carry out detailed structural design of the Substructure.
The arrangement comprised the following components:
- 4no. corner Support Pods to transfer loads into the ground
- 2no. Spreader beams to span between the Support Pods and provide support for the loads above
- 1no. Sub-Base Module sitting atop the Spreader Beams:
- Supporting the 191t jacking loads
- Supporting a 35t BOP
- Support the HWU tower above c/w all dead, personnel & functional loading
- All components were configured to be road transportable throughout WA without the need for a pilot
- All components were liftable in accordance with DNV 2.7-3 R00 requirements
- Ease of assembly with minimal use of bolting, instead adopting clamped, bearing and turnbuckle connections
- Design compliance with API Spe. 4F – Drilling & Well Servicing Structures
The Scope:
The following was delivered as part of an integrated project approach & full collaboration between design engineering, fabrication and client:
- Basis of Design & Functional Specification
- Concept development
- Detailed engineering design & 3D modelling
- Fabrication drawings, dxf files and NC files
- Fabrication support
- Assembly procedures
1. Staad.Pro structural analysis 2. Staad.Pro 3D model
3. AutoCad 3D model exported to Navisworks 4. Completed structure assembled for operation
5. BOP suspended under Sub-Base Module
