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There are two main ways to extract oil:
Oil is mostly buried deep underground (or on the seabed), it is a fluid mineral, so it usually only needs to be drilled and then extracted through the oil production
pipeline.
In the early stage of drilling an oil well, due to the great pressure under the formation, the oil in the oil reservoir is often driven by pressure and automatically sprayed upwards, then the "self-injection oil production method" can be used to produce oil
.
Self-injection oil production is not only simple equipment, convenient management, but also economic mining, high output, is currently the ideal way to produce oil, generally using advanced technology and good conditions of oil wells can maintain a few years or even more than ten years of self-injection form
.
Wells or reservoirs that have passed the self-injection period have low pressure, and the oil can only flow into the well but have no ability to spray it on the surface, so the mechanical oil recovery method is used, that is, the oil is pumped through the pumping pump commonly known as the "kowtow machine" installed on the well
.
Wells that use kowtow pumping can also maintain a certain amount of production
for a considerable period of time.
