The difference between Christmas tree and wellhead blowout preventer

The Christmas tree is a wellhead device for a spouting well. It is mainly used to suspend the tubing string running into the well, seal the annular space of the tubing casing, control and regulate the production of the oil well, ensure operation, construction, record oil and casing pressure data, test and wax removal and other daily production management.

The blowout preventer is used to close the wellhead during oil testing, workover, completion and other operations to prevent blowout accidents. It combines the two functions of full seal and half seal. It has the characteristics of simple structure, easy operation, high pressure resistance, etc. , It is a safety seal wellhead device commonly used in oil fields to prevent blowouts. During oil drilling, it is installed on the wellhead casing head to control high-pressure oil, gas, and water blowout devices. When the oil and gas pressure in the well is high, the blowout preventer can close the wellhead (shut down). When the heavy mud is pressed into the drill pipe, there is a four-way under the ram, which can replace the gas invaded by the mud, increase the pressure blowout preventer of the liquid column in the well, and the difference between the Christmas tree and the wellhead blowout preventer to suppress high pressure oil and gas Squirting.