Wellhead Tools, Cementing Tools, Downhole Tools manufacturer / supplier in China, offering HDD Use 18in Roller Cone Hole Opener IADC 537 13in Stabilizer, HDD Use 18in Roller Cone Hole Opener IADC 617 10in Stabilizer, HDD Use 18in Roller Cone Hole Opener IADC 617 14in Stabilizer and so on.