Regarding oil production wellheads, you must know these...

Wellhead devices are oil production wood, tubing heads, casing heads and related parts, and are oil production equipment such as suspension, support, control, and adjustment. As an important equipment for oil and gas production, its performance is related to the safe production of oil and gas wells.

The casing head is an important connection between the casing and the wellhead. The lower end is connected with the surface sleeve with screws, and the upper end is connected with the wellhead device and the blowout preventer with a flange and a belt.