I can see all this 'washing over' is probably worth the trouble...

I can see all this 'washing over' is probably worth the trouble just to win back the valuable drill pipe.
What seems to be missing is at what level did the washing over commence and as a result after getting 400m+ pipe out what level are we now working at.
You say kashga that it is feasible to get past the collars.
This must mean if this was achieved we would be pretty close to the BHA. Even so you say, OK "give it a final yank" but be ready to set the wedge.
Like you still give little hope of it moving even though hudreds of meters of pipe have been freed up?

Do you, or any other reader, from the info given, have any clue what level they may be working at now?

Ever hopeful,

geojac