Russian crude-oil exports have taken a serious hit since new sanctions and a price cap came into force earlier in the week, with the Wall Street Journal reporting that figures from two data providers on Russian crude both show a big fall, though their magnitudes differ. According to one commodity-analytics firm Kpler, Russia’s seaborne exports fell by nearly 500,000 barrels per day on Tuesday, a 16% decline from the November average of 3.08 million bpd. Meanwhile, TankerTrackers.com, which tracks sea vessels using signals and…