Chemical cleaners directed to the oil drilling industry; Chemical cleaners directed to the oil and gas drilling and fracking industries; Chemical cleaners to remove crude oil, heavy oil, and bitumen from oilfield and oil sands equipment in particular vessels, storage tanks, tank bottoms and floating lids, hydrocarbon fouled heat exchangers, sludge tanks, and piping systems; Chemical cleaners to remove crude oil, heavy oil, and bitumen from oilfield and oil sands equipment; Chemical cleaners t...