slick/spiral drill collar is produced by aisi 4145h modified quenched and tempered steel as api specification and implementation of sy / t5144 standard, which can be cold thread rolling, copper or phosphate processing, machine special double shoulder thread and other specificatiomore...
Internal upset transit area 120~160mm long Transition area long & smooth, reliable and high quality Equipped with make & break machine, make & break testing can be done as per customer requirement, also, cold rolling of the threads can be carried out as per customer demand In linmore...
Outside Diameter: Φ10mm-Φ711mm (1 8"- 28") Wall Thickness: 1.6- 100mm Quality Standards: API DNV ISO DEP EN ASTM DIN BS JIS GB Length: 6-14m(19.5'-45.5') Grades: ASTM A335more...