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Types of oil casings
Different types of oil casing used in oil production: Surface oil casing protects the well from contamination by shallow water and shallow gas layers support wellhead equipment and maintain the weight of other layers of casing. Technical oil casing separates pressure at different levels so that d...Read more -
The difference between high frequency welded steel pipe and straight seam welded steel pipe
No. 1. Different nature 1. High-frequency welded steel pipe: After the hot-rolled coil is formed by the forming machine, the skin effect and proximity effect of high-frequency current are used to heat and melt the edge of the tube blank, and pressure welding is performed under the action of the e...Read more -
Significance of Heat Treatment Process for Oil Casing
In addition to being used for oil exploration, the appearance of oil casing can also be used as a pipeline for transporting raw materials. To enhance the quality of oil casing, every link in the production process is particularly important, especially the temperature control during the period, wh...Read more -
The difference between straight seam welded pipe and spiral welded pipe
Metallurgical Properties of Fabrication Materials The raw material of the spiral welded pipe is a hot-rolled coil, and the straight seam welded pipe is made of a steel plate socket. The weight of the alloy contained in the coil is less than that of the steel plate, and it is for this reason that ...Read more -
Common Defects in Welding Area of Spiral Seam Submerged Arc Welded Steel Pipe
Defects that are prone to occur in the welded area of submerged arc welded steel pipes include pores, hot cracks, and undercuts. 1. Bubbles. Bubbles mostly occur in the center of the weld bead. The main reason is that hydrogen is still hidden inside the welded metal in the form of bubbles. Ther...Read more -
What are the reasons for the uneven wall thickness of the spiral seam submerged arc welded steel pipe
The wall thickness of the spiral seam submerged arc welded steel pipe is uniform and looks good, and the force is uniform and durable. A phenomenon that is easy to occur in the process of steel pipe rolling and adjustment, the uneven wall thickness of steel pipes is mainly reflected in the appear...Read more