What are the functions and main features of gas production wellhead devices?

Gas production wellhead equipment is mainly composed of casing head, tubing head and Christmas tree. The casing head is mainly used to connect each layer of casing to the oil layer casing and seal the annulus between the two layers of casing. The tubing head is mainly used to suspend the lower tubing and seal the annular space between the tubing and casing. The gas tree is mainly used for operations such as opening and closing wells, adjusting pressure and production during production, testing under pressure gauge, measuring pressure at wellheads, and fishing.

Gas production wellhead device, including casing flange, tubing head, and Christmas tree; it is characterized in that: there are manual conjoined valves on the left and right sides of the tubing head and the left and right lower sides of the Christmas tree four-way, and two flat valves need to be installed in series; The valve body of the manual flat valve above the spool of the Christmas tree is integrated with the spool of the Christmas tree to form a four-way flat valve assembly.

For the conjoined valve and the four-way flat valve, you can choose the hidden stem flat valve or the open stem flat valve as the combined object; in addition to the valve body and the valve stem, other similar parts of the flat valve are shared with each other. Therefore, on the basis of keeping the original function of the wellhead device unchanged, the space size of the gas production wellhead device is greatly reduced, raw materials and installation time are saved, and the link that may cause high pressure leakage is reduced, which is more beneficial to the field of oil workers. Operation; so as to achieve the purpose of reducing consumption and increasing efficiency.

This series of wellhead equipment consists of bottom flange, upper flange, tubing head, gate valve, needle valve, small four-way, stop valve and other components and instruments.

The main features of gas production wellhead devices:

1. All pressure-bearing parts and flanges are made of alloy steel forgings, and have undergone non-destructive testing to ensure safety.

2. The gate plate, valve seat and needle valve of the gate valve are all made of laminated (sprayed) welded hard alloy.

3. The main parts of the gas production wellhead device have good sulfur resistance after special heat treatment.

4. The seal is made of sulfur-resistant materials, such as polytetrafluoroethylene and fluorine rubber.

5. The gas production wellhead device is simple in structure, light in weight and reliable in operation.