The Main Function Of The Wellhead Of The Pumping Well 

1. The main function of the wellhead device of the pumping well

(1) The weight of all tubing strings in the connecting casing, suspended tubing, and supporting well.

(2) Seal the annular space between oil and casing.

(3) Regulate and control the production of oil and gas.

(4) Conduct various downhole tests and record oil samples and oil casing pressure data.

(5) Implement downhole operation measures such as wax removal, sand removal, well washing, acidification, fracturing, and workover.

Second, the role of each component

1. The structure and function of the wellhead sealing box

(1) Sealed box structure

The sealed box is composed of a spring seat, a spring, a lower pressure cap, a rubber seal, an upper pressure cap of the sealed box, a lower pressure cap of the sealed box, a pry bar and a polished rod.

2) The role of the sealed box

Seal the annular space between the polished rod and the tubing to prevent oil leakage at the wellhead.

2. The role of rubber gate

It plays the role of sealing well and adjusting the center of the polished rod when changing the sealing box.

3. The role of tubing cross

It is used to connect the rubber gate, the main gate and the left and right production gates. It is the necessary passage for well fluid outflow and testing.

4. The role of the casing cross

The function of the casing cross is the main component of the collection and flow division of the tubing and casing. The lower connecting casing is short-circuited to seal the annular space of the oil casing.

5. The role of the main gate

The function of the main gate is to cut off the bottom hole pressure during the opening and closing of the well and the maintenance of equipment other than the main gate.