drill collar API standard

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drill collar API standard

Tianjin Shiruida Machinery Import and Export Company of China

Tianjin Shiruida Machinery Import and Export Company of China Products

drill collar API standard - Dec, 05 2009

The collars are made of AISI 4145H forging or finish rolling alloy structural steel.
The drill collar are trepanned and drifted to API Spec 7.Grinding crafts adopted finish boring technology eliminates regions of the weld stress concentration, making welding appearance more perfect, and increasing their life. The full length thermal treatment ensure the mechanical performance fullfil even exceed API Spec 7 requirements

Company Name :

Tianjin Shiruida Machinery Import and Export Company of China

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