Crash, I had same reaction ... why the big PPS move. Don't know if something did happened, or if someone thinks something may happen over the coming weekend. Obvious catalyst could be decision, or belief of a decision this coming weekend, of Husky taking an NADL rig (WEminence or WRigel) in lieu of the SDRL West Mira.
I looked at my TDA Think or Swim platform to see if any unusual trading activity on NADL today. Noted that up through 3:40pm (ET) today the trading was slim and steady throughout the day ... then at 3:41pm there was a small blip in the trading, perhaps around 20,000 shares, but then at 3:51pm a huge number of shares traded (looks like around 300,000 shares ... then at 3:58 another huge number of shares traded, looks like another ~300,000 shares. I set my Think/Swim platform parameters to show volume traded by minute for today, which means I can not tell if its one large block traded, or a series of large blocks during the same 60 seconds. T.D.