The DST tools / Drill Stem Testing Tools are the full bore type and annular pressure operated tools for downhole well testing operation. The drill stem testing tools are applicable for 4 1/2” to 20” casing, the tools OD is 3 7/8” and 5”, Working pressure upto 105Mpa, working temperature upto 425F, the DST tools is designed and manufactured according to NACE MR0175 standard,
Specification of Data Header
| Name | Size | Specification |
| RTTS Packer | 4 1/2”-20” Casing | 70Mpa, 400F |
| CHAMP IV Packer | 7”-13 3/8” Casing | 70Mpa,400F |
| Champ XHP Packer | 7”-13 3/8” Casing | 105Mpa, 400F |
| RTTS Circulating Valve | 4 1/2”-20” Casing | 70Mpa, 400F |
| IPO Circulating Valve | 5” OD | 70/105Mpa 400F |
| Hydraulic Circulating Valve | 3 1/8, 3 7/8” and 5” OD | 70/105Mpa 400F |
| RD Safety Circulating Valve | 3 1/8, 3 7/8” and 5” OD | 70/105Mpa 400F |
| RD Circulating Valve | 3 1/8, 3 7/8” and 5” OD | 70/105Mpa 400F |
| OMNI Circulating Valve | 3 1/8, 3 7/8” and 5” OD | 70/105Mpa 400F |
| RTTS Safety Joint | 4 1/2”-20” Casing | 70/105Mpa 400F |
| Round mandrel slip joint | 3 1/8, 3 7/8” and 5” OD | 70/105Mpa 400F |
| TST Valve | 3 1/8, 3 7/8” and 5” OD | 70/105Mpa 400F |
| RD Sampler | 3 1/8, 3 7/8” and 5” OD | 70/105Mpa 400F |
| Drain valve | 3 1/8, 3 7/8” and 5” OD | 70/105Mpa 400F |
| LPR-N Valve | 3 1/8, 3 7/8” and 5” OD | 70/105Mpa 400F |
| Select tester valve | 5” OD | 70/105Mpa 400F |
| Hydraulic Jar | 3 1/8, 3 7/8” and 5” OD | 70/105Mpa 400F |
| Gauge Carrier | Design as per Gauges | 70/105Mpa 400F |
| Radial shock absorber | 7”Casing | 70/105Mpa 400F |
| Vertical Shock Absorber | 5” OD | 70/105Mpa 400F |
| MFE | 5” OD | 70Mpa, 400F |
| VR Safety Joint | 5” OD | 70Mpa, 400F |
| Hollow plug Impact reversing sub | 5” OD | 70Mpa, 400F |
About ZZ TOP OIL TOOLS
Xi’an ZZ Top Oil Tools Co.,Ltd as head office registered in Xi’an City in 2010, and in 2016, ZZ TOP OIL TOOLS enlarged the downhole oil tools factory and named Baoji Keyuan Petroleum Equipment under the Brand - TECHCORE, which engages in designing and manufacturing the downhole oil tools including DST tools, Coiled tubing tools etc.
With the business expanding we re-built the factory “Baoji Keyuan Petroleum Equipment Manufacture Co.,Ltd” in Baoji city under Brand “Techcore” to be the high-tech industrial enterprise in 2016. As one group, ZZ TOP provides the clients highly efficient & expertise service as well as more comprehensive products to meet the customers' requirements during the work, and insists on "Traceability, Serialization" for each tools and related parts
Product scope
RTTS Serires: Full bore retrievable packer, full bore retrievable circulating valve, full bore retrievable safety joint,
Tester Valve: downhole tester valve, select tester valve, LPR- N Valve, Tubing String Tester Valve
Circulating valve: omni valve, multi-cycle circulating valve, RD Circulating valve, RD safety Circulating Valve, Hydraulic Circulating Valve
Other DST string tools: hydraulic jar, vertical shock absorber, radial shock absorber, RD safety circulating valve, high pressure retrievable packer with bypass, CHAMP packer, IPO valve, sleeve type drain valve, rupture disk sampler, super safety valve with control panel, BOP safety valve for downhole operation and so on.
