Buttress : No-Cross Coupling

18 September 2009 Hi folks,

At a DWOP that I facilitated this week, we were discussing the offline "stand-building" opportunities for an offshore multi-activity rig.

When we talked about making up Buttress casing off-line we were concerned about cross-threading, especially as we lowered the first 2 or 3 pre-M/U joints onto the final one. Any misalignment, eg due to vessel motion, would be magnified by the length of the "assembly" and could cause thread damage.

About 10 years ago, I came across a "No-Cross Coupling" that acted as a kind of enhanced stabbing guide. We used it successfully to M/U 20" housings, that had 13 3/8" BTC extensions, onto the casing string

Can anyone advise if this product is still made and where we can get it from ..

Also, does anyone have any other good ideas to prevent the threads getting crossed.

Thanks

Dave Taylor
Relentless Pursuit of Perfection
www.relentlesspursuit.co.uk

4 Answer(s)

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