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SRD Export Co., Ltd, China,Tianjin

 
 
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drill collar 

  Category : Metals and minerals->Powder Metallurgy

     
drill collar
 
 
       

  Product Specification
 
  Model No:      API
  Country  CN
  Brand  API
  Minimum Order  000
  Payment Term  L/C

 

    Product Detail
  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.

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