Drilling fluid solid control system is an important part of oil drilling engineering, it is responsible for the purification of drilling fluid, to ensure the stability of drilling fluid performance, so as to ensure the smooth progress of drilling operations. In the drilling fluid solid control system, the choice of pipe material is very important, because it is directly related to the corrosion resistance, wear resistance and service life of the system. Here are some common pipe materials:

1.Carbon steel: carbon steel is an alloy steel made of iron as the main component and a certain amount of carbon is added. It is widely used in the pipeline material of drilling fluid solid control system, especially when the conveying medium is oily or less corrosive to steel. Carbon steel has good mechanical properties and weldability, but its corrosion resistance is weak, and it is usually necessary to improve the corrosion resistance by coating or coating.

2. Stainless steel: Stainless steel is an alloy steel with a chromium content of at least 10.5%, which has excellent corrosion resistance. In the drilling fluid solid control system, when the conveying medium is highly corrosive drilling fluid, stainless steel is often selected as the pipeline material. In particular, type 304 and 316 stainless steels, which contain nickel and molybdenum, can resist the corrosion of gasification and are suitable for offshore drilling environments.

3.Duplex steel: Duplex steel is a special low carbon steel, through the control of the heat treatment process, so that it has an iron surface and austenitic biphase structure. It combines high strength and good toughness with good corrosion resistance. In drilling fluid solid control systems, duplex steel is suitable for applications requiring high strength and good corrosion resistance.

4.Super duplex steel: Super duplex steel is a kind of duplex steel, but it has higher strength and better corrosion resistance. It contains high chromium, molybdenum and nitrogen content, which significantly improves its resistance to pitting and stress corrosion cracking. In extremely demanding drilling environments, super duplex steel is the ideal pipeline material of choice.

5. Nickel-based alloy: Nickel-based alloy is an alloy formed with nickel as the main component and other alloy elements such as chromium, molybdenum, copper, etc. It has excellent corrosion resistance and high temperature resistance, especially in environments containing hydrogen sulfide. Nickel-based alloys are expensive and are often used in drilling fluid solid control systems where corrosion resistance is highly required.

When selecting the pipe material for drilling fluid solid control system, the following factors should also be considered:

1. Medium properties: According to the composition of drilling fluid, such as oil, water, sand content, etc., select the appropriate pipeline material.

2. Use environment: consider the temperature, pressure, corrosion and other factors of the drilling environment, select the corresponding pipeline material.

3. Cost budget: under the premise of meeting technical requirements, consider the cost of pipeline materials and maintenance costs.

To sum up, the selection of pipe material for drilling fluid solid control system is a complex engineering decision, which requires comprehensive consideration of multiple factors.