Conductor centralisation when drilled and cemented?

Deepwater conductors are drilled and cemented in many operating environmennts where jetting is not possible due to glacial deposits, hard ground, etc.

The tapered wellbores drilled ranging from 26" 36" to 42" combinations(and not accounting for washout and enlargement particularly often at the shallow soft seabed)typical 30", 36" or 30" × 36" conductor combination are run into the wellbore almost exclusively without centralisation.

When centralisation is such a key part of primary and optimal cementation, the simple question is why is this so?

Where if there any practical solution to this, please share this advice?

Finally in terms of wellhead design, well life cycle fatigue consideration. When a conductor ends up hard up against the wellbore on one side and fully cemented on the other opposite size what cause and effect would/could the end result be?  

regards,

Peter.

0 Answer(s)

Support Spread

We need the support of our members to keep our forum online. If you find the information on spread useful please consider a donation

Donate