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            Products & services
            
                            
            
                        
            
                    
            
            
            
            
            
        
            
    
            


            
    
            
        
            
            
                
            

            Drill Collar
            


            

            

            Product Introduction 
            

            


            

            The drill collar is a thick-walled drilling tool that applies bit pressure, to enhance drilling.
            

            

            

            

            
            





            
            
                
            

            Product Specification
            


            

            (a)Size (OD): 3-1/8" to 11".
            
(b)Type: Slick drill collar, spiral drill collar, non-magnetic drill collar.
            
(c)Drill collar specification: API Spec 7-1, API Spec 7-2, API RP 7G, NS-1, DS-1. 
            
(d)Other proprietary products of Hilong that applicable to deep well and harsh environment drilling.
            
(e)Please refer to Table A.4 or Table B.4 for the specifications of commonly used API drill collars.
            


            


            

            

            

            
            











        



    
            

            




    

            
    
            
        
        
    
            

            

            


            
    
            
        
        
            
    
            

            

    
    
    
    
    
    
    
    
    
    
    

    

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