API Spec 7- 1 Water Well Drilling Drill Collar Lifting Sub 2 7/8"- Nc23 AISI 4145h

China API Spec 7-1 Water Well Drilling Drill Collar Lifting Sub 2 7/8"- Nc23 AISI 4145h, Find details about China Lifting Sub, Drill Collar from API Spec 7-1 Water Well Drilling Drill Collar Lifting Sub 2 7/8"- Nc23 AISI 4145h