-Design & working procedure Conform to the requirment of  API Spec

-Non-API standard type of drill collars are also avalible as per client'request

-Cold-rolled thread roots

-  low alloy steel as material applied

-Integral forging, no welds

-hard banding can be added as per client ’ request 

-Option Integral heavy weight drill pipe with two central upsets and with spiral grooves are also available