Blowout preventer

Blowout preventer is used for testing, well completion, such as closed wellhead during process, preventing the blowout accident happened, the whole seal and seal two functions, it has a simple structure. Easy operation and high pressure resistance are oilfield commonly used to prevent security seal wellhead blowout.
Oil drilling, installed in the wellhead casing head, used to control the high pressure oil, gas, water blowout device. In the oil and gas in well pressure is high, can close the mouth of the well blowout preventer. From the pipe inner pressure into heavy mud and its gate under cross, can replace the suffer indignities invasion of mud, increase the borehole fluid column pressure in high pressure oil and gas pressure.
Its type regular bop, universal bop and rotating blowout preventer. Universal blowout preventer can be started, in case of an emergency to handle any size of drilling tools and empty well; Rotating blowout preventer is can achieve spray while drilling operation. In deep well drilling is in addition to the two kinds of common blowout preventer, coupled with the universal blowout preventer, rotating blowout preventer, the combination of three or four land on the wellhead.
Usually equipped with a ram bop large gate, operation will be in a sealed between the string and the wellbore annular space, in the case of baa has a string in well, can also be done separately to seal the well, but use it several times now, and not allowed to use long term shut in. In the oil and gas drilling, installed in the wellhead is used to control the gas and liquid, fluid pressure and direction suspension casing, rotary table, and seal the tubing and casing and casing of every layer of annular space device.
Generally consists of casing head, tubing head, the bop stack, four way, by pass pipe fittings.