Drill Collars

We supply blank ended Drill Collars made from the richest quality AISI series 4145 1-1. modified alloy steel heat-treated to a Brinell hardness range of 285-341 and minimum average Charpy impact value of 45 ft. lbs.

Mechanical properties are guaranteed at 1” below surface at room temperature. Surface BHN is also recorded. Each bar is ultrasonically tested in accordance with API Spec 7, ASTM A388.

We always maintain the highest degree of material certification traceability and a complete set of material test reports is sent with each order.

Connections, spiraling, and other turning work can be provided through additional sources.

Call for special OD and ID sizes