waxed off tubings and SSD

English Tech/Engineering Petroleum Eng/Sci

Pumping hot oil through coil tubing to clean out waxed off tubings, or by pumping down annulus through a circulating valve or SSD

ErichEko ⟹⭐ Aug 24, 2006: Btw, by KudoZ rules, you can have only one term, one phrase, or one sentence per posting. So, there must be two separate postings for two terms: WOT and SSD.
William [Bill] Gray Aug 24, 2006: What comes after the SSD? There can be several possibilities here. I presume this is about the oil industry? Or is it service stations?