Techcore Oil Tools Co.,Ltd,
Professional Provider & Manufacture of DST tools, Coiled Tubing Tools & Wireline Tools
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Multi-Cycle Circulating Valve For Drill Stem Testing in Cased Hole
Introudction of DST OMNI Valve
The Multi-Cycle Circulating Valve is the part of drill stem testing tool string. It is also called OMNI Valve in Halliburton type. The multi-cycle circulating valve is operated by differential pressure which can offer multi open and closed cycles. Shear pins in the multi- cycle circulating valve hold the tool in the closed position during the run-in-hole. Once on depth, applied pressure shears the pins, and allow the tool to cycle through forward circulating, reverse circulating and closed positions.
Operation of the DST OMNI Valve /Multy-Cycle Circulating Valve
When the Multy-Cycle Circulating Valve is in the well test position, we can do the flow test in the oil well. In this test position, the circulating ports of the OMNI Valve are closed and the ball valve is opened. When the downhole drills stem test is closed, the Multy-Cycle Circulating Valve is in the well test position during flow and shut in period, and the workstring can be pressure-tested in the blank position as the ball valve closes before the cicualting valve opens. When the circulating ports of the Multy-Cycle Circulating Valve are open and the ball valve is closed, the fluid in the oil well can be pumped in either direction through the tool in the circulating position.
Technical parameter of DST OMNI Valve
| No | Specification | 5” |
| 1 | OD | 127.5mm |
| 2 | ID | 57mm |
| 3 | Length | 6555mm |
| 4 | Working pressure | 105Mpa |
| 5 | Ball valve Open Differential pressure | 35Mpa |
| 6 | Ball valve top and bottom differential pressure | 70Mpa |
| 7 | Internal Pressure strength | 146Mpa |
| 8 | External pressure strength | 136Mpa |
| 9 | Tensile strength | 2034KN |
| 10 | Torque strength | 31.6KN.m |
| 11 | Circulating Flow area | 2280mm2 |
| 12 | Service | H2S,NACE MR0175(>175oF) |
| 13 | Working temperature | -29℃～+204℃ |
| 14 | Connection thread | 3 7/8″CAS.B×P or 3 1/2″IF.B×P |
* Drill stem testing tools are available for cased hole, open hole and slim hole including:
| Name | Size | Specification | Well type |
| RTTS Packer | 4 1/2”-20” Casing | 70Mpa, 400F | cased hole |
| Full bore mechanical setting packer | 5"-18 3/8" Casing | 70Mpa / 105 Mpa, 400F | cased hole |
| CHAMP IV Packer | 7”-13 3/8” Casing | 70Mpa,400F | cased hole |
| Champ XHP Packer | 7”-13 3/8” Casing | 105Mpa, 400F | cased hole |
| RTTS Circulating Valve | 4 1/2”-20” Casing | 70Mpa, 400F | cased hole |
| IPO Circulating Valve | 5” OD | 105Mpa 400F | Open hole , cased hole |
| Hydraulic Circulating Valve | 3 7/8” and 5” OD | 105Mpa 400F | Slim hole , cased hole |
| RD Safety Circulating Valve | 3 7/8” and 5” OD | 105Mpa, 400F | Slim hole , cased hole |
| RD Circulating Valve | 3 7/8” and 5” OD | 105Mpa, 400F | Slim hole , cased hole |
| OMNI Circulating Valve | 3 7/8” and 5” OD | 105Mpa, 400F | Slim hole , cased hole |
| RTTS Safety Joint | 4 1/2”-20” Casing | 105Mpa, 400F | cased hole |
| Safty joint | 4 1/2"-20" | 105Mpa, 400 F | open hole |
| Round mandrel slip joint | 3 7/8” and 5” OD | 105Mpa, 400F | Slim hole , cased hole |
| Tubing string Tester valve | 3 7/8” and 5” OD | 105Mpa, 400F | Slim hole , cased hole |
| RD Sampler | 3 7/8” and 5” OD | 105Mpa, 400F | Slim hole , cased hole |
| Drain valve | 3 7/8” and 5” OD | 105Mpa, 400F | Slim hole , cased hole |
| LPR-N Valve | 3 7/8” and 5” OD | 105Mpa, 400F | Slim hole , cased hole |
| Select tester valve | 3 7/8” and 5” OD | 105Mpa, 400F | Slim hole , cased hole |
| Hydraulic Jar | 3 7/8” and 5” OD | 105Mpa, 400F | Slim hole , cased hole |
| Gauge Carrier | Design as per Gauges | 105Mpa, 400F | Slim hole , cased hole, open hole |
| Radial shock absorber | 7”Casing | 105Mpa, 400F | cased hole |
| Vertical Shock Absorber | 5” OD | 105Mpa, 400F | cased hole |
| Super Safety Valve / BOP safety valve | 8” OD | 105Mpa, 400F | cased hole |