What Is The Function Of The Wellhead Device? 

The wellhead device is a double-wing structure. This valve adopts the parallel gate structure commonly used in the world today. The valve body, valve cover, valve plate and valve stem are made of materials with good high temperature resistance and creep resistance. The entire valve of the wellhead device can withstand a high temperature of 380 degrees. Under high temperature and high pressure, the valve will not deform when opening or closing. The non-metallic seal made of high temperature resistant materials has good sealing performance at the 380 wellhead.

A wellhead device and an oil production wellhead device include a tee, a gate, a pipe collar, a short joint, a flange and a polished rod seal. The wellhead device cooperates with the inner cone of the upper part of the lower flange to realize positioning and centering. The well head is directly connected to the upper flange. The end face of the connection between the upper flange and the lower flange is provided with an annular groove, and the sealing steel ring is installed in the groove of the wellhead device. The entire wellhead device is simple in structure, light in weight, easy to manufacture, reliable in sealing, and convenient to use.

The wellhead control device is composed of steam-carrying Christmas tree and tubing head. A 7-inch bottom is flanged to the lower part of the tubing string through a tapered seat, and the Christmas tree is connected to the upper part.