- Orient Energy & Technologies Co., Ltd.
- Downhole Mud Motor, Drilling Bit, Mwd, Lwd, Trenchless Devices, Near Bit Geosteering Sys, Edge Resistivity
Hebei
- Unibrom Corp.
- flame retardant
Shandong
- Puyang Zhongshi Group Co., Ltd.
- Float Collar and Float Shoe, Cementing Basket, Stage Collar, Cementing Head
Henan