Drill Collars

A drill collor is a part of a drill string that provides weight on bit for drilling. Drill collars are durable, thick-walled bars that are made from steel or nonmagnetic nickel-copper alloy, nonmagnetic premium alloys.

The bars of steel are drilled from end to end to provide passage of fluids through the collars. The outside of the steel bars can be machined slightly to ensure roundness based on your project needs.