Safety Valve w/ wrench – 5-1/2 20# LTC 10M

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Safety Valve w/ wrench – 5-1/2 20# LTC 10M

An oil field 5-1/2″ 20# LTC 10M Safety Valve (or Kelly Valve/FOSV) is a high-pressure, manually operated, ball-type valve designed to be stabbed into the drill string or connected to the top drive to prevent backflow and control well kicks. It is rated for a 10,000 PSI working pressure and comes with an operating wrench for rapid, 90-degree closing.

Specifications & Features:

Size: 5-1/2 inch (Outer Diameter).
Weight Class: 20# (20 lb/ft, generally indicating the casing/drill pipe weight compatibility).
Connection: 5-1/2″ LTC (Long Thread Coupling).
Working Pressure: 10,000 PSI (10M or 10K WP).
Type: Full Opening Safety Valve (FOSV) / Kelly Cock.
Operation: Manual (includes operating wrench).
Construction: Typically one-piece for high strength, or two-piece for larger internal diameters.
Material: Often compliant with NACE MR0175 for sour gas (H2S) service.

Applications:

Drill Pipe Safety Valve (TIW Valve): Stabbing into the top of the drill pipe/tubing at the rig floor during a well-control incident.
Upper/Lower Kelly Valve: Installed between the swivel and kelly (upper) or top of the drill string (lower) to control fluid flow.
Mud Saver Valve: Used to prevent mud loss when disconnecting the kelly.

Key Benefits:

High Pressure Rating: 10M (10,000 PSI) rating ensures safety during high-pressure, dangerous, or deep-well operations.
Full Bore Design: Allows for the passage of tools, such as wireline tools, survey instruments, or core barrels, without restricting flow.
Rapid Response: The provided wrench allows for quick, 90-degree manual operation.