It's been a while since I started this discussion (about pre-loading wiper plugs).
At a recent DWOP (my company's 250th
Workshop!!), we were discussing the practice of pre-installing SSR wiper plugs inside subsea casing hanger running tools.
The client uses the cunning stunt of constructing a mousehole in their yard and pre-loading the items there, vertically, to minimise the potential for any damage during installation.
However, it is a warm climate and also the items are then likely to be stored horizontally.
At the DWOP, we discussed the potential for 'sag' (when stored horizontally) causing localised flat-spots on the wiper plugs, increasing the likelihood of by-passing/leakage when used.
Please, can members provide an update on your current practices for storing pre-loaded assemblies.
- Do you store vertically or horizontally ?
- Do you place time limits on this ?
- Do you use an 'special' tools and techniques to address the above ..
- What failures, if any, have you experienced with pre-loaded items ?