What is wellhead equipment? How to hang the tubing correctly? AI Beibei tells us that after the completion of oil and gas wells, there must be a set of equipment that can control and regulate oil and gas production. This equipment is called wellhead equipment, usually called Christmas tree. It has the following main functions:
　　(1) The weight of all tubing strings supporting the well is suspended in the tubing;
　　(2) Sealing annular space between tubing and casing;
　　(3) Control and adjust oil well production;
　　(4) Ensure all kinds of underground operations, such as major repair and minor repair;
　　(5) It can carry out daily production management, such as obtaining oil pressure, casing pressure data, pressure measurement and wax removal.

　　What is wellhead equipment? How to hang the tubing correctly?
　　Oil and gas wellhead devices can be divided into three types
　　1、 Automatic wellhead equipment, casing brake, main brake, production brake, wax brake, tubing fork and nozzle.
　　2、 The pumping wellhead is simpler than the flowing wellhead. The basic part is composed of casing tee, tubing tee and polished rod seal box.
　　3、 The blowout tree is a kind of gas wellhead device, and its structure is the same as that of the blowout wellhead device. Because natural gas well has high pressure and contains hydrogen sulfide gas, it is necessary to have high pressure resistance level and hydrogen sulfide gas corrosion resistance.