1.standard:API7-1 2.OD:79.4mm-279.4mm 3.factory directly delivery 4.Alloy steel,carbon steel,stainless steel etc.

Drill collars is one of the most important product which mainly used to provide bit weight to drill so that drill pipe is in tension. Especially drill collar can keep drill bit centralized and hole track by large rigidity. BSD brand drill collars are manufactured strictly from API Spec7-1 standard. The product quality and stability, the customers satisfaction is 100%.

 

 

    

For more than 40 years, we've been exploring and developing upon producing various oil drilling tools including Drill Pipe, Drill Collar, Heavy Weight Drill Pipe, Kelly,Pup Joint and so on.

 

 

 

  

(Factory)API 7-1 Spiral Drill Collar--Drilling tool