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TRMAXX

Surface-controlled subsurface safety valves

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Overview

General service, self-equalizing, premium rod-piston flapper valves

TRMAXX™ surface-controlled subsurface safety valves are hydraulically actuated from surface by using a control line to transmit hydraulic signals to the valve. These tubing-pressure sensitive, standard spring valves have been rigorously tested and qualified per the requirements of API Spec 14A. They are suitable for a range of subsurface environments, including both production and injection wells and various wellbore fluids—oil, gas, and water.

The robust design of TRMAXX valves is optimized for reliability and longevity. The premium dynamic seals of the hydraulic actuator enable seamless operation. Nonelastomeric rod-piston seals and static end stops ensure the pressure integrity of the hydraulic system whether the valve is in the open or closed position. A field-proven metal-to-metal flapper closure mechanism is used to isolate the wellbore, controlling flow to surface when closed.

Working pressures up to 10,000 psi [69 MPa]
Oil and gas wells
Operating temperature: 40 to 300 degF [4 to 149 degC]
CCS wells
Operating temperature: –31 to 176 degF [–35 to 80 degC]
Survival temperature: Down to –109.3 degF [–78.5 degC]
Setting depths up to 6,000 ft [1,829 m]
Partially cutaway schematic of a TRMAXX surface-controlled subsurface safety valve.
TRMAXX surface-controlled subsurface safety valve.
Applications
  • Sweet to severely corrosive environments
  • Oil and gas wells, CCS wells
Benefits
  • Minimizes risk with fewer potential leak paths
  • Increases reliability by protecting the hydraulic piston bore
  • Enables flapper pressure equalization without compromising reliability
  • Minimizes solids and scale deposition
  • Lowers workover costs by enabling use of simple slickline interventions for lockout and hydraulic communication
  • Extends service life by reducing operating friction and resisting corrosive chemicals
Features
  • Validation to API Spec 14A V1-R
  • Field-proven INCONEL® 718 flapper and seat with secondary soft seat
  • Flapper-mounted, dart-based equalizing system
  • Static, metal-to-metal or metal-to-PEEK hydraulic end seals in open and closed positions
  • Metal-to-metal premium connection body seals
  • Rod-piston actuator with nonelastomeric dynamic seals
  • Hydraulic system rated 15,000 psi [103 MPa]
  • Sliding components with optimal geometry and clearance

    INCONEL is a registered trademark of Special Metals Corporation.

    FAQs

    How are the valves qualified?

    The valves are validated to API Spec 14A V1-R, but their performance exceeds the certification requirements.

    Flapper leakage: API Spec 14A allows leakage up to 5 ft3/min. The acceptance criterion for TRMAXX safety valve flapper systems is 150 times more stringent.

    Hydraulic actuator integrity: API Spec 14A allows up to 5% drop in applied hydraulic pressure; for 10,000-psi hydraulic pressure, the acceptable leakage is 500 psi. TRMAXX safety valve actuators allow <1% drop, as confirmed by rigorous tests.

    Slam closure: The valve's flapper system has been successfully slam tested at high flow rates that exceed the Annex K requirements of API Spec 14A.

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