The anti-eccentric wear coupling (pipe anti-eccentric wear device) is a supporting tool for sucker rod anti-eccentric wear of pumping wells. It has the characteristics of simple structure, convenient use, long service life and relatively low cost. It is suitable for eccentrically worn pumping wells, especially suitable for eccentrically worn pumping wells and directional inclined wells above the neutral point of the sucker rod. The sucker rod is below the neutral point and matched with the nylon centralizer on the sucker rod body for better anti-eccentric wear effect.

1. Technical Principle

   The technical core of the anti-eccentric wear coupling (pipe anti-eccentric wear device) is to coat AOC-160 alloy powder on the surface of the sucker rod coupling with a special surface treatment process to obtain a wear-resistant, corrosion-resistant and low-coefficient of friction coating. The thickness is greater than 0.25mm, the wear resistance is more than 10 times that of ordinary couplings, and the wear of the tubing is reduced by about 3 times.

2. Performance characteristics

1. Has excellent self-protection

   The AOC coating ensures that the coupling maintains excellent wear resistance and corrosion resistance in complex underground conditions. The composition, structure, and hardness of the coating are very different from those of the tubing, which prevents and delays the occurrence of initial adhesive wear. The high hardness of the coating enhances the wear resistance of the coupling.

2. It has a good protective effect on the tubing

   The unique anti-friction element (ε phase) in the AOC-160 coating is uniformly transferred to the surface of the tubing in  the form of flakes during the friction between the coating and the tubing, and adheres to the tubing surface to form solid lubrication to protect and slow down the tubing surface At the same time, the friction coefficient between the coupling and the tubing is reduced, and the friction is reduced.

3. Product series

   According to the actual needs of the oil field, our company's anti-eccentric wear coupling (pipe anti-eccentric wear device) has 3/4", 7/8", 1" and other series specifications, and various reducing diameter connections can be made according to user requirements. Coating and processing of hoop.

   The anti-eccentric wear tools produced by our company: sucker rod centralizers, sucker rod anti-dropping devices, tubing centralizers, casing centralizers, special tubing centralizers, etc.