What exactly is a Christmas tree? Is it a wellhead device or a kowtow machine?

The Christmas tree is actually the main part of the wellhead, and it is completely different from the pumping unit (kowtow unit).

The Christmas tree is mainly composed of three parts: 1. Casing head; 2. Tubing head; 3. Christmas tree body (production gate, main gate, test gate, small cross, etc.).

The main functions of the Christmas tree are: 1. Suspend the tubing. 2. Seal the annular space between the tubing and the casing. 3. Control and regulate the production of oil wells (water injection wells). 4. Realize various downhole operations.

The role of the pumping unit is "swabbing." It uses the power provided by the motor to convert the rotating motion of the motor into the up and down reciprocating motion of the donkey's head by using the "four-bar linkage mechanism", thereby driving the "polished rod-sucker rod-deep well pump" to pump crude oil to the ground. .