Downhole protection

What is downhole protection?
- Downhole protection solutions are designed to manage conditions within a well that could otherwise place excessive pressure on the casing or annulus. Crushable foam wrap provides a controlled method of increasing available annulus volume as pressure and temperature rise.
What is crushable foam wrap?
- Crushable foam wrap is an engineered syntactic foam system installed around the inner drill casing within the annulus. It is designed to collapse at a predetermined combination of pressure and temperature, creating additional volume for annular fluid to expand into.
How does crushable foam wrap prevent excessive annular pressure?
- As temperature and pressure within the annulus increase, the foam is designed to collapse, reducing its volume and creating additional available annulus volume. This allows the annular fluid to expand without a corresponding increase in pressure, helping mitigate the operating pressure profile.
Where is crushable foam wrap installed?
- Crushable foam wrap is installed around the inner drill casing within the annulus. It can be positioned anywhere within the trapped annulus while still allowing free circulation of the fluid.
How is crushable foam wrap designed for different well conditions?
- The foam is formulated and manufactured in different grades to achieve specific collapse characteristics. There are 12 approved grades covering a range of pressure and temperature conditions, allowing the solution to be matched to the requirements of the well.
Does crushable foam wrap restrict circulation of drilling fluids?
- No. The crushable foam wrap can be positioned within the trapped annulus while allowing the free flow and circulation of the annular fluid.
Can crushable foam wrap be customised?
- Yes. The foam structure and collapse characteristics can be selected to suit the pressure and temperature conditions of the well. Bespoke tooling can also be manufactured to accommodate different pipe configurations or subsea architectures.
What happens when the foam reaches its designed collapse conditions?
- Collapse initiates when the predetermined pressure and temperature conditions are reached and propagates along the foam column. As the foam collapses, additional annulus volume becomes available, allowing fluid expansion and helping prevent excessive pressure build-up.

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Downhole protection

Protecting casing integrity through pressure management

Engineered to manage annular pressure build-up in demanding well conditions, our downhole protection solutions provide controlled volume expansion within the annulus. Designed around specific pressure and temperature requirements, they help maintain casing integrity throughout the well’s operating life.

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