KHIA headerKnow-How in Action

VOL XXXII, NO 143

Belzona® Compliant Superwrap Repair On Riser Wellhead Casing

 
 

Industry:

Oil & Gas (OILG)

 
 

Application:

Valves, Pipes and Fittings (VPF)

 
 

Customer Location:

Oil Field Operator, North Sea, Norway

 
 

Application Date:

July 2016

 
 

Application Situation:

17 years old 18" offshore riser.

 
 

Problem:

Severe corrosion on 17 years old 18" production riser on a North sea oil producing platform had resulted in a critical through wall defect. The riser was containing drillfluid as the oil production from the well been stopped recently. The drillfluid was leaking into the surrounding casing through the defect creating possible safety and environmetal issues. The design parameters were: 20 years life expectancy, design temperature 55 deg Celcius and design pressure 1 MPa

 
 

Products:

Belzona 1111 (SuperMetal)

Belzona SuperWrapII System

 

Substrate:

Carbon steel

 
 

Application Method:

The application was carried out in accordance with Belzona System Leaflet VPF-11. Following gritblasting, the defect area was patched with a layer of Belzona 1111. Immedeatley after this, the Belzona SuperWrap II system was installed in accordance with the calculated dimensions. After curing the application for 48 hours, a custom-made clamp was assembled to set the casing back to its former location and purpose, covering the SuperWrapII repair completely.

 
 

Belzona Facts:

The full preparation and SuperWrap application was executed without the use of hot work and finished on schedule in 3 days.

 
 

Photographs Description

1. View of defect area.

2. Gritblasting details.

3. Gritblasting details and defect area patched and prepared using Belzona 1111.

4. Completed SuperWrapII application.

 
Case study pic one

 

 
 Case study pic two

 

 
 Case study pic three

 

 
 Case study pic four

 

 
 
For more information about Belzona visit: www.belzona.com