Yuanheng Oilfield Equipment Co., ltd, a professional manufacturer of DST tools, has been operational in Oil & Gas Industry worldwide for over 20 years. 
With higher quality and competitive price, our DST tools occupy more than 70-80% of the domestic market and have gained a great popularity in the oil-producing countries like Pakistan, Iran, Indonesia, Canada and etc
Products Range:
• RTTS Packer
• RTTS Safety Joint
• FUL-FLO Hydraulic Circulating Valve
• Internal Pressure-Operated (IPO) Circulating Valve
• Repetitious Circulating Valve
• RTTS Circulating Valve
• Rupture Disk (RD) Safety Circulating Valve
• Tester Valve
• Select Tester Valve
• Tubing String Testing (TST) Valve
• Rupture Disk (RD) Tubing String Testing (TST) Valve
• Round Mandrel Slip joint
• Shock Absorber
• Hollow Plug Impact Reversing Sub
• HYDROSPRING Tester
• VR Safety Joint
• Champ Packer
• Bridge Plugs
• PRESSURE OPERATED Tester Valve(LPR-N) 
• OMNI Valve
• Pressure gauge carrier
• MFE