Removing 'old' Xmas tree from wellhead/THAF

Dear members

At a recent slot recovery performance workshop, the topic of removing the Xmas tree was discussed in some detail.  This is a Wellhead Platform and the work will be undertaken by a jack-up.

For sure, the team will undertake ‘hot bolting’  to ensure no lost-time with bolt removal.

But the tree has been on for a while and there are concerns that it will not 'pull off easily.  

There was discussion about installing lifting points on the Xmas tree. That didn't sound a good solution to ignorant ol' me;, tugging on a ‘free-standing’ wellhead.

In previous workshops, in Europe, thin jacks are used to prise the Xmas  tree off. 

When I intervened and suggested thin jacks, I was corrected and told that  they were "an expensive solution" and that a cheaper solution was available; I may have misheard, but it sounded like hammering wedges in between the flange faces (?).

What response and insights do members have , along with solution(s)?

Thankyou in advance

0 Answer(s)

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