Tianjin Shiruida Machinery Import and Export Company is located in the Bonded Area in Tianjin port of China, which is a comprehensive foreign trade company involved in the import and export business on petroleum drilling tools and drilling rigs.

 

Key Products:

Petrleum drilling pipes,drilling collars,drilling bits,well drilling rigs and workover rigs

 

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.