The Largest Caliber Special Butt Seamless Casing Produced Domestically Successfully
Tianjin Steel Pipe Once Again Supports "Super Project"! The Largest Caliber Special Butt Seamless Casing Produced Domestically Successfully Applied in the "Ten-Thousand-Meter Scientific Drilling" Recently, the "Deep Chuanko 1 Well," the world's first geological conditions, most complex and drilling-difficult "ten-thousand-meter scientific drilling" led by the China Petroleum Southwest Oil and Gas Field, started drilling