Spiral Drill Collar
The Spiral Drill Collar is used in drilling to reduce friction with the wellbore, prevent sticking, and maintain stable downhole operations in oil/gas, geothermal, and mining drilling. ● Spiral Drill Collar, A hardness range of 285 to 341 HBW and a Charpy impact value of 40 Ibs/ft are guaranteed for evenly distributed 16 points in any cross sections at room temperature; ● Spiral Drill Collar ,Connections are phosphate coated after machining to protect the threads from corrosive elements and to prevent galling upon initial make-up; ● Spiral Drill Collar ,Thread roots are cold rolled on APl and H-90 connections; ● Spiral Drill Collar, Pressed steel thread protectors are supplied for all drill collar that are equipped with standard connections
