What is crude oil? How produced
There is a certain amount of oil that cannot be recovered after the blowout and discharge. But now it is not used in this way. In addition, there are always some equipment in the oil, such as oil from the pump rod tubing, downhole oil flow to the wellhead equipment of pump, the equipment removed from underground when there are some oil will be scattered on the ground. Oil pipelines and oil wells wellhead equipment if run, run, drip, leak, there are some oil spills to the ground. Some criminals to steal oil, will control the flow of oil from the wellhead valve open or gathering pipeline punctured in the oil, will form a large number of crude oil. It is estimated that China's annual oil due to various reasons, about 100 thousand tons of oil, direct economic losses amounting to tens of millions of dollars.
The ground oil usually refers to the oil in the oil reservoir due to excessive pressure and raging out of the earth (i.e. "blowout"), or the start of production in some wells before (usually the newly discovered oilfield first wells), consciously make the oil ejected outward from the wellhead ("blowout"). The purpose is to record the well in a certain period of time exactly how much oil production
Crude oil extraction of oil from the bottom, usually at the wellhead through simple oil-water separation into oil and gas gathering and transportation pipelines, where oil production process did not enter the pipeline leak from oil or oil pipeline in oil and oil production area scattered on the ground (such as criminals from being oil pipeline punctured steal oil caused by the oil spill), usually called "falling oil"
