connections of spiral drill collar,china drill collar

• Post Date:

  Nov 18,2013

• Expiry Date:

  Nov 18,2014

• Detailed Description:

  Quantity: high quailityMetric Tons
  Specs:API Spec.5DP
  Payment Method: Remittance
  The drill collars are made of 4145H modified chromium-molybdenum alloy steel acc.to API Spec.7 and SY/T 5144.All threads can be phosphated, copperized or cold worked. All threads are machined with CNC Lathes-Double-shouldered and special threads. And a special the max diameter of drill collar is 14 inch.
  

• Company:

  HENAN WEIN INDUSTRY CO.,LTD     [ China ]        

• Contact:

  hewei

• Tel:

  86-371-65807516

• Fax:

• Email:

  weindipipe@gmail.com