Full Opening Safety Valve
Full Opening Safety Valve(short for FOSV) is a ball type safety valve used to stop flow through the drill string when the drill string is being withdrawn from the well.
Parameter of Full Opening Safety Valve
Full Opening Safety Valve(short for FOSV) is a ball type safety valve used to stop flow through the drill string when the drill string is being withdrawn from the well.
FOSV is dual body full-opening safety valve, so it does not interfere with the running of tools such as core barrels or survey instruments. It is designed to be stabbed into the top joint of drill pipe or tubing string at the rig floor and closed quickly in case a well kicks.
The ball-type design permits the valve to be compact, easy to handle, and yet have great strength. Standard test pressure is 10,000PSI, but higher pressure ratings are available.
FOSV and operating wrench be should be maintained on the rig floor at all times.
When ordering please specify；
Connection.
O.D. and I.D.
Specifications – Full Opening Safety Valve
| Model | XS105-T44 | XS110-T51 | XS124-T62 | XS127-T62 | XS133-T57 | XS133-T57 | XS134-T62 |
| O.D. | φ105 | φ110 | φ124 | φ127 | φ133 | φ133 | φ134 |
| I.D. | φ44 | φ51 | φ62 | φ62 | φ57 | φ57 | φ62 |
| Connection | 2 3/8 IFB×2 3/8 IFP | 2 7/8 IFB×2 7/8 IFP | 2 7/8 EUE | 2 7/8 EUE | XT39 | 4 1/2VAM | 3 1/2 IF |
| Length | 723 | 726 | 578 | 578 | 773 | 1173 | 800 |
Specifications – Full Opening Safety Valve
| Model | XS134-T62 | XS146-T50.8 | XS152-T76 | XS152-T76 | XS178-T76 | XS178-T76.2 | XS190-T82.6 |
| O.D. | φ134 | φ146 | φ152 | φ152 | φ178 | φ178 | φ190 |
| I.D. | φ60 | φ50.8 | φ76 | φ76 | φ76 | φ76.2 | φ82.6 |
| Connection | 4 1/2UN | NC31 | 3 1/2 NU | 3 1/2 EUE | 3 1/2EUE | 4IF | 4 1/2 IF |
| Length | 580 | 832 | 640 | 617 | 675 | 885 | 895 |
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