Caisson Inspection
What is Caisson First?
- Protective carbon steel vertical pipes on offshore platforms
- Protect internal components including pumps, risers and discharge systems
- 1” wall thickness
- 15” to 60” diameter
- 20m – 90m in length
- Up to 50 tonnes in weight
- 3 types of caissons:
Ø Pump
Ø Dump
Ø Carrier
Caisson Challenges
1. Caisson failures carry high risk of:
- Dropped objects
- Increased financial costs
- Legal penalties
- Environmental damage
- Safety incidents
- Platform shutdown
2. Difficult to get accurate and reliable inspection data at critical areas:
- Topsides (above water)
- Splash zone
- Subsea (below water)
3. Many interfaces involved for projects:
- Numerous client departments
- Sub-contractors
Innovative Solution for Caisson Inspection
- INTERNALLY deployed inspection tools
- Three phased inspection
- Visual camera inspection
- Caisson cleaning using HPWJ *
- Ultrasonic measurements of caisson wall
- Topsides and subsea inspections in one go
- Fully comprehensive data