TRM-4 Series reduced-OD tubing-retrievable, surface-controlled subsurface safety valves feature rod-piston actuation, metal-to-metal body joints, a rugged flapper-closure mechanism, and a minimum number of critical seals. This combination maximizes reliability in general-service applications in sweet to moderately corrosive environments.
For optimal valve OD, some sizes of these valves feature the unique Camco curved-flapper design. Some of these valves also include a fail-safe equalizing system above the flapper seat. A modular design enables flexibility in material and engineering options, including a wide range of nipple profiles.
The internal equalizing system in some valves of the series creates a dedicated flow path for wellbore fluid, minimizing effects of erosional velocities.
The premium rod piston system uses a reliable, spring-energized filled Teflon sealing element. Operating within the valve's chamber housing, the system comprises a stepped OD; a compliant down-stop of polyetheretherketone polymer; a static, full-closed metal-to-metal seal; and an integrated piston centralizer.
For maximum reliability, all TRM-4 reduced-OD valves have only two body joints and use proprietary threads to achieve a solid, metal-to-metal seal. The premium flapper mechanism also has full metal-to-metal sealing plus a secondary soft seat, and it meets a leakage-acceptance criterion that is substantially more stringent than API and ISO specifications.
A unique lockout mechanism enables a simple slickline procedure to permanently lock the valve open and initiate secondary hydraulic communication. A second option enables locking open the valve without activating secondary hydraulic communication.
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