Oil casing pipe is one of the indispensable equipment in the petroleum industry. It needs to have high strength, corrosion resistance, wear resistance and other properties. Therefore, the selection of materials is very important. Common petroleum casing materials currently on the market include the following:
1. Carbon steel
Carbon steel is one of the commonly used petroleum casing materials. It has good strength and toughness, and the price is relatively low. In some conventional oil fields, carbon steel oil casing can meet basic needs. However, carbon steel is not as corrosion-resistant as other materials and is easily corroded by acidic liquids. Therefore, in some special occasions, other materials may need to be selected.
2. Stainless steel
Stainless steel is a material with good corrosion resistance, usually composed of iron, chromium, nickel and other elements.
Stainless steel oil casing not only has excellent corrosion resistance, but can also adapt to higher temperature and pressure conditions. However, the price of stainless steel is higher, and the manufacturing cost is also higher compared to carbon steel.
3. Chromium Molybdenum Steel
Chromium-molybdenum steel is an alloy steel that contains a higher proportion of chromium, molybdenum and other elements. Chromium-molybdenum steel oil casing has good corrosion resistance and high-temperature strength, and is commonly used in deep-sea oil exploration and oil well casing in high-temperature and high-pressure environments. Compared with stainless steel, chromium-molybdenum steel has more stable performance at high temperatures and is relatively more reasonably priced.
4. Titanium alloy
Titanium alloy is a lightweight, high-strength, corrosion-resistant metal material commonly used in aerospace, medical equipment and other fields. In recent years, with the technological advancement of titanium alloy materials, titanium alloy petroleum casing has begun to be used in the production of oil and gas wells. It has excellent corrosion resistance, high strength and high temperature performance, but the price is relatively high.
5. Carbide
Cemented carbide is a high-hardness, high-strength material made by hot pressing of metal powders such as tungsten and cobalt. Carbide oil casing is mainly used for crushing, drill bits and other tools in the oil mining process. It has the characteristics of anti-wear and high temperature resistance.
In summary, the selection of oil casing materials needs to be based on specific circumstances. Different materials have different characteristics and prices. Enterprises need to choose appropriate oil casing materials based on their own actual conditions to ensure production efficiency.
Read more: Oil Casing Material Selection: Carbon Steel VS Stainless Steel
