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China Vigor Drilling Tools and Equipment Co,. Ltd
Stabilizer, Drill Collar, Pup Joint, Fishing magnet, Washpipe, Spear etc
 
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drill collar

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Title： drill collar 
Unit price： Negotiable
MOQ： Negotiable
Quantity： Negotiable
Delivery date： Since the payment date Days delivery
Contact： ViviSun （Mr.）    
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Details
Spiral drill collar is used to reduce contact area with hole so as to avoid efficiently bit sticking from diffirential pressure.

The drill collars are manufactired strictly according to API Spec7-1 and NS-1 Standard , Alsp Norsok Spec.

drill collar
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