The materials used in water well machinery mainly include various materials used for well pipes, filter pipes, submersible pumps, and drilling equipment. Different materials are selected based on the application and environmental conditions to ensure durability and efficiency.
1. Well Pipe and Filter Pipe Materials
Carbon Steel (Q235B): Widely used in drilling pipes and dewatering pipes. It is low in cost, has moderate strength, and is suitable for general geological conditions. The surface can be galvanized or coated with an anti-corrosion coating to extend its service life.
Stainless Steel: Suitable for corrosive water quality or high-requirement projects, such as 304 and 316 stainless steel. 316 contains molybdenum, which provides stronger corrosion resistance and is suitable for seawater or high-chlorine environments.
Bridge-Type Filter Pipe: Made by punching and rolling steel plates, it has high water throughput and mechanical strength. Common materials are carbon steel or stainless steel. The open area ratio can reach over 12%, effectively preventing gravel blockage.
Polyethylene (PE): Used in shallow wells or observation wells. It is corrosion-resistant and lightweight, but has lower strength, suitable for wells with a depth not exceeding 300 meters.
2. Submersible Pump Materials
Casing: Mostly made of 304 or 316 stainless steel, possessing good corrosion resistance, especially suitable for long-term immersion in water.
Impeller: Commonly made of cast iron or stainless steel. Cast iron is suitable for clean water, while stainless steel is used for sandy or corrosive liquids.
Shaft and Seals: Shafts are mostly made of 45# steel or stainless steel; seals are made of rubber or fluororubber to ensure waterproofing and leak-proofing.
3. Drilling Machinery Materials
Water Well Drilling Rigs: Mainly constructed of high-strength steel, including drill pipes, drill bits, power heads, etc. Some equipment uses carbon steel with wear-resistant treatment to cope with complex formations.
Deep well drilling machinery: such as high-efficiency deep water well drilling machinery, is made of high-strength steel and features robustness, durability, and ease of operation, making it suitable for construction nationwide.
