Anti-corrosion, anti-sticking, high temperature resistant oil casing connector and preparation method thereof

Abstract

The invention provides an anti-corrosion, anti-sticking, high-temperature-resistant oil casing connector, which includes a connector base and a tungsten-based amorphous alloy coating, the amorphous alloy coating itself has high activity, and Ni-P amorphous in the coating State structure passivation film, evenly distributed and dense, can prevent further internal corrosion; in addition, the oil casing connector described in this application can replace the ordinary oil casing connector and the conventional process of painting anti-seize agent, etc., through Electroplating amorphous alloy on the substrate saves the steps of brushing lubricants and anti-sticking agents, effectively reduces the labor intensity, improves the efficiency of oil extraction, and avoids lubricants and anti-sticking agents under high temperature. The defect of failure prolongs the service life of the oil casing.

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