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 in the Sichuan Basin.

Under the organization of R&D teams within CITIC Special Steel Group’s subsidiary, Tianjin Steel Pipe Manufacturing Co., Ltd., a tailor-made comprehensive casing selection solution was developed for this well, involving the design and development of 14 types of non-standard structural casings. Among them, the core section adopts a 25-inch (635mm) special butt casing, which is currently the largest caliber special butt seamless casing produced domestically.

In order to meet the drilling schedule of the “Deep Chuanko 1 Well,” Tianjin Steel Pipe established a special project team, collaborating with Daye Special Steel Co., Ltd., Zhejiang Taifu Seamless Steel Pipe Co., Ltd., and other sister companies under CITIC Special Steel Group. Together, they successfully fulfilled the production task of supplying large-diameter casings. Currently, the first batch of casings produced by Tianjin Steel Pipe has been transported to the oilfield.

“Deep Chuanko 1 Well”

The “Deep Chuanko 1 Well” is led by the China Petroleum Southwest Oil and Gas Field and has a designed depth of 10,520 meters. Ten-thousand-meter deep oil and gas drilling is a “super project” in the global oil and gas exploration field and has become a significant indicator of engineering technology and equipment levels. Situated in the Sichuan Basin, the “Deep Chuanko 1 Well” has the highest drilling difficulty among ten-thousand-meter deep wells worldwide due to its complex geological structure. It sets the standard for 13 engineering difficulty indicators globally, with 7 of these indicators ranking first in the world for the “Deep Chuanko 1 Well.”