- API Pony Rod
- 2016-11-05 23:13
- Complying with the same quality requirements applied to API sucker rods, for each steel grade there are pony rods availa
- Progressive Cavity Pumping Application Rod (Non API)
- 2016-10-31 19:40
- The PCP application rod is developed by Nine-Ring and patent registered. I t is widely used and recognized in China oil
- Oil Well Pump (Barrel-Tubular-Type)
- 2016-10-31 06:31
- THE OIL WELL PUMP: BARREL-TUBULAR-TYPE is study the API SPEC 11AX and comply with other industry standard requirement GB
- API Coupling
- 2016-10-25 10:17
- Nine-Ring's Class T and Class SM coupling for sucker rods are manufactured as per API Specification 11B. For the thread