An anti-corrosion and anti-adhesion high-temperature-resistant oil sleeve connector and a preparation method

Abstract

The invention provides an anti-corrosion and anti-adhesion high-temperature-resistant oil sleeve connector, comprising a connector substrate and a tungsten-based amorphous alloy coating, the amorphous alloy coating itself is highly active, and a Ni-P amorphous structural passivation film existing in the coating is uniformly and compactly distributed to be able to prevent further corrosion inside; and in addition, the oil sleeve connector in the application can replace an ordinary oil sleeve connector and a routine work procedure of smearing an anti-sticking agent. Through electroplating the amorphous alloy on the substrate, the steps of brushing a lubricant and an anti-sticking agent are omitted to effectively reduce the labor intensity, improve the efficiency of oil exploitation, avoid the defects of failure of the lubricant and anti-sticking agent under high temperature and prolong the service life of an oil sleeve.

Description

technical field [0001] The invention relates to a connector, in particular to an anti-corrosion, anti-sticking, high-temperature resistant oil casing connector for oil field development. Background technique [0002] In the process of oil field development, pumping wells are the most important way of oil production at home and abroad, and the oil casing is the main equipment. Generally, the oil casing is connected by the thread of the oil casing collar, and the oil casing is kept The sealing state of the tube space. [0003] However, as the oilfield enters the middle and later stages of exploitation, the working environment in the well is getting worse and worse. The well fluid contains various corrosive components such as carbon dioxide and hydrogen sulfide. Corrosion damage is becoming more and more serious, which often leads to corrosion and perforation of oil casing couplings, resulting in oil leakage. In severe cases, thread failure occurs and breaks off, resulting in ...

AI Technical Summary

Problems solved by technology

[0003] However, as the oilfield enters the middle and later stages of exploitation, the downhole working environment is getting worse. The well fluid contains various corrosive components such as carbon dioxide and hydrogen sulfide. Corrosion damage is becoming more and more serious, which often leads to corrosion and perforation of oil casing couplings, resulting in oil leakage. In severe cases, thread failure occurs and breaks off, resulting in serious well shutdown accidents. At the same time, the oil casing coupling will also stick to the oil casing, resulting in the failure to remove and replace the oil casing coupling normally and quickly, increasing the work intensity of the operator and reducing the work efficiency

[0004] Aiming at the sticking situation, oilfields currently generally use lubricating paste and anti-sticking agents on the thread of the oil casing coupling. Although it has a certain effect, it increases the labor intensity of the operator, and the effect is only limited. It can be maintained once, and it needs to be repeated for the next maintenance

In addition, lubricating paste, anti-sticking agent and other materials will fail in high temperature environment for a long time, which cannot meet the high temperature resistance working conditions of the increasing number of ultra-deep wells and heavy oil hot wells in oil fields