The consumption of oil well pipe accounts for about 21% to 25% of the total consumption of seamless steel pipe. 90 years of consumption are between 75 to 90 million t. 1997 apparent consumption of 800,000 t, 1998 to 920,000 t. 1998 domestic oil well pipe 660000 t, the domestic market share of 72%. 2000 is estimated to consume less than 1 million t. Production capacity and apparent consumption were essentially flat. Due to the difficulties in the supply of high-performance products, the actual production is insufficient, so still need to import each year.

The required range of specifications is available. But the oil casing steel level is only J55, N80, P110, which J55, N80 accounted for more than 85%, from the actual need for more high steel level has a greater distance.

Oil industry, technological progress and focus on economic efficiency, to promote the casing to the small diameter (Φ139.7mm) transfer. Sometimes without surface casing, technical casing or with a welded pipe instead. Surface casing with welded pipe has become inevitable, oil wells with seamless steel pipe consumption in the same case must be reduced.