How to deal with corrosion at octg tubing coupling?
In water wells or oil wells containing corrosive gases and liquids, in order to increase the service life of the tubing, generally, anti-corrosion tubing is used.
However, the currently used anti-corrosion tubing is partially coated with an anti-corrosion layer or lined with an anti-corrosion layer, and there is no anti-corrosion layer in the middle annular groove of the two ends of the coupling, which is easy to cause corrosion under the action of corrosive medium and liquid turbulence. It shortens the service life of the tubing and causes downhole accidents in severe cases.
In order to solve this problem, Sanjack Petro company has developed a new type of anti-corrosion tubing joint to improve the overall corrosion resistance of the tubing. The utility model has the advantages of simple structure, convenient use, and good corrosion resistance, which can prolong the service life of the tubing and reduce the occurrence of downhole accidents.
This product is composed of a tubing coupling (1) and a tubing body (3).
The anti-corrosion sealing ring (2) is added in the middle annular groove of both ends of the tubing coupling (1).
When the tubing coupling (1) connecting with the tubing pipe body (3), the external thread of the tubing pipe body (3) is screwed on the sealing ring (2), and the anticorrosive layer (4) in the tubing pipe body (3) and the tubing coupling (1)
The sealing ring (2) forms a continuous sealing anti-corrosion layer, thereby solving the problem of corrosion in the annular groove between the two threads of the coupling.