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(1) The domestic casing pipe is in accordance with SY/T6194-96, and the length of the casing is not fixed, and its range is 8-13m. However, casings not shorter than 6 m can be supplied, and the number...

The electric resistance welded pipe (ERW steel pipe) is a method in which a weld is combined and pressure is applied through an electrode, and the electric current is welded by the electric resistance...

The welded square tube is a hollow square section steel square tube, also known as a hollow cold-formed steel. The utility model relates to a profiled steel of a square cross-sectional shape which is ...

J55 casing pipe is an important equipment for oil drilling. Its main equipment also includes drill pipe, core pipe and casing, drill collar and steel pipe for small diameter drilling. J55 oil casing s...

Reasons for cracks in seamless steel pipes: 1. The crack traverses the thickness direction of the slab. The crack in the central equiaxed grain region is a curved fine crack along the grain boundary. ...

Electric fusion welding is the joining of metals by heating the metal between one or several consumable electrodes and the workpiece.Electric resistance welding is a welding that uses a strong current...

The inspection of seamless steel pipes generally includes: inspection of geometrical dimensions and surface quality; chemical composition, mechanical properties, process performance, inspection of hig...

With the development of oil well gas drilling operations to more severe working conditions such as deeper, higher pressure and higher temperature, and the continuous improvement of oil drilling techno...

Galvanized seamless steel pipes have very little galvanizing, only 10-50g/m2, and their corrosion resistance is much worse than that of hot-dip galvanized pipes. Regular galvanized pipe manufacturers ...

Based on the analysis of fracture morphology, chemical composition, mechanical properties, microstructure and corrosion product composition, the causes of cracking of casing collar of an oil well were...