SI systems

Mr. Timo Makinen's letter (OGJ, Nov. 1, 1999, p. 8) caught my eye rather quickly.The statement that "the US, Liberia, and some other smaller nation" are the only countries that do not use SI units is simply not true, as I can say based on 40 years' experience in the oil industry.Let's start with Canada. Here the SI units were introduced essentially "by decree" in the late 1970s. At present, the units used in the field are a mixture of the old and the new. SI units have an advantage over the "field" units, if one sticks to the standard SI units, for example "m3/s" for production rate. But that (like several other SI units) is unwieldy for everyday use (e.g., the world oil producti...

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