Drill Collar manufacturers
Product introduction ●Size: ●3 1/8"-11"OD Material: ●AISI 4145H/AISI 4145H MOD ●Non-magnetic Type: ●Slick drill collar ●Spiral drill collar Features ●Made from 4145H modified, quenched and tempered as API standards. ●Pressed steel thread protectors. ●Stress relief groove and bore back features.
