The Single-Shot Circulating Valve is used to reverse circulate fluids out of the drill stem at the end of a test. When a pressure disc is ruptured, the applied annulus pressure from the burst moves the mandrel and allows fluid through the ports. As the mandrel moves, a snap ring engages to hold the mandrel and keep the tool in the circulating position.
| Competitor Name or Tool | Model |
|---|---|
| Schlumberger Single-shot Reversing Valve | SHRV-FFB |
| Schlumberger Slim | SHRV-GAA/GAB |
| Halliburton | Pump Thru Rupture Disc Safety Circulating Valve |
| Halliburton | Rupture Disk Safety Circulating Valve |
| Expro Annulus Operated Reversing Valve | AORV |