Drill collar as one component of a drill string is extremely industrial tubular and used to drill into the ground to provide weight on the bit for drilling. It is used in conjunction with a drill pipe. There are slick and spiral-grooved types mainly. Vigor's collars are engineered to the highest standards to deliver optimal performance and durability for demanding drilling applications. Our manufacturing process is certified to API spec 7-1 and NS-1, and our products undergo rigorous quality control to ensure dependable service under punishing downhole conditions.