Product Details

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(short for FOSV) is a ball type safety valve used to stop flow through the drill string when the drill string is being withdrawn from the well.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	2A10X2A11	210X211	2 7/8 EUE	2 7/8 EUE	XT39	4 1/2VAM	310X311
Length	732	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 1/2NU	NC31	3 1/2NU	3 1/2 EUE	3 1/2EUE	4A10X4A11	410X411
Length	580	832	640	617	675	885	895