TRIV Dual Barrier Injection Safety System with Wireline Retrievable VOi
TRIV Dual Barrier Injection Safety System with Wireline Retrievable VOi Applications • • •
Mild to Severly corrosive environments Formations requiring injection rates to 70,000 bpd [11,129 m3] Wells requiring injection pressure to 10,000 psi [68,948 kPa]
Benefits • • • • • • • •
Prevents uncontrolled well flow Eliminates choke size chatter by continually adjusting in response to a flow Prevents injection backflow Maximizes injection rates Provides dual barrier system Eliminates flapper throttling Reduces erosion from high rate injection flow Eliminates need for external control line
Features • • • • • • • • •
Tubing retrievable Subsurface controlled Wireline retrievable variable orifice choke Minimum pressure drop over entire injection rate range Erosion resistant materials in flow path Proven hard/soft seat flapper seal Orifice automatically adjusts in response to flow rate Designed in accordance with API 14A Metal to metal body joint
™
The Tejas TRIV™ dual barrier injection safety system is a tubing retrievable, subsurface controlled valve that features the VOi™ variable orifice choke. This valve features the VOi, a wireline retrievable, venturi type, variable orifice insert choke that controls valve opening and the rate of injection. This safety system is certified under the American Petroleum Institute (API) Specification 14A-0032. The Tejas VOi variable orifice system is designed to cover the entire range of operator specified injection flow regimes. The VOi insert eliminates throttling and potential damage to the flapper and seat in the TRIV during initial opening and incidents of unplanned reduction in injection flow rate. Critical internal components of the VOi system and TRIV valve are made from specially hardened materials and feature special surface hardening treatment to mitigate the effects of erosion from high injection flow rates. The TRIV features two body joints which are metal-to-metal seal connections. The flapper sealing system uses the field-proven hard/soft seat combination to effect an initial low-pressure seal while providing a metal-to-metal final seal for high shutin pressures. The design of the TRIV provides a reliable, extremely versatile system that is virtually maintenance free. This dual barrier system, featuring the wireline retrievable VOi orifice venturi choke system, is designed to yield a 20-year service life. Its design is capable of injection rates to 70,000 bpd [11,129 m3] and 10,000 psi [68,948 kPa] working pressure. The TRIV features a temporary lock-open mechanism that is engaged using standard wireline procedures. The VOi venturi type variable orifice choke
Copyright Tejas Research & Engineering, LLC 2015, All rights reserved 9185 Six Pines Dr., The Woodlands, TX 77380 Phone: 281 466 8700
TRIV
www.tejasre.com [email protected]
™
TRIV Dual Barrier Injection Safety System with Wireline Retrievable VOi
can be retrieved via standard wireline procedures and the TRIV flapper will close providing well control during removal of the VOi insert. If further through tubing workover operations via wireline procedures, conductor line procedures, or coil tubing procedures must be done the TRIV flapper may be temporarily locked in the open position with wireline to facilitate these workover procedures.
The TRIV valve with VOI inserted is intially installed in the locked open position to allow baypass and ease of installation. Initial injection unlocks the TRIV/VOi assembly for normal operation.
The TRIV dual barrier injection safety system can be supplied with any customer specified nipple profile and will be supplied to meet any customer specified material requirements. System Operation TRIV operation and elimination of throttling The TRIV valve is a normally closed valve, opens in response to injection flow and has an unlimited setting depth. Injecting fluid from the surface, casuses the valve to open. The primary barrier is the TRIV flapper which blocks flow back fluid or produced fluids mingled with injected fluids when Injection ceases. The patented VOi variable orifice valve, which is the operating mechanism, is also normally closed. In contrast to a fixed orifice insert choke, the VOi insert opens and the variable orifice expands or contracts in flow area in response to increases or decreases in injection flow rate. During injection, the TRIV flapper is open and shielded by the flow tube before the VOi variable orifice begins to open. This operation eliminates flapper throttling. Throttling can permanently damage the flapper and its hard/soft seat combination and adversely effect the integrity of the flapper closure mechanism.
TRIV and VOi injection operation The VOi variable orifice insert’s primary operating components include of permanent magnets, power spring, orifice seat and variable orifice. In the closed position, the VOi magnets are coupled due to mutual magnetic attraction and the power spring force. The power springs main function is to close the orifice. The magnets mutual attraction keeps the orifice choke closed and the initial seal maintained. The initial unlocking and opening sequence of the TRIV flapper is injection initiated, when injection pressure against the closed choke in excess of 40 psi, the TRIV flow tube moves downward to compress the power spring and telescope the flow tube and place it in the operating position. Further injection pressure in excess of 40 psi activates the VOi, further seperates the magnets, compresses the power spring and moves the choke seat, choke and choke housing downward to open the variable choke and lock the TRIV and VOi flow tubes together. When injection flow ceases the variable choke insert returns to the fully closed position and the TRIV flow tube moves upward allowing the flapper to close.
Copyright Tejas Research & Engineering, LLC 2015, All rights reserved 9185 Six Pines Dr., The Woodlands, TX 77380 Phone: 281 466 8700
www.tejasre.com [email protected]
TRIV Dual Barrier Injection Safety System with Wireline Retrievable VOi
™
When injection resumes a differential pressure is created behind the closed choke to move the TRIV flow tube downward and fully open the flapper before injection flow is initiated. At a 40 psi differential the VOi choke and choke housing snap downward separating the magnets, compressing the VOi power spring and allowing the variable orifice to open to allow injection into the well. As injection flow increases the VOi power spring is further compressed to cause the orifice to open further allowing more fluid to be injected. The VOi choke insert also serves as a metering device which creates a constant compressive force on the TRIV power spring to make sure the TRIV flapper stays fully open and shielded by the TRIV flow tube until injection fully ceases. TRIV Service Operations Temporary lockout of TRIV Option 1. After retrieving the VOi variable choke with a GS or PRS type pulling tool the TRIV valve’s flow tube may be temporarily locked in the open position with a TRIV temporary lockout tool (TLO) using standard wireline procedures. Temporarily locking the TRIV in the open position leaves the well with a fully open unobstructed bore to perform through tubing service work with wireline, conductor line or coil tubing. When the TRIV is temporarily locked open the surface wellhead MUST be tagged out to visually signify that a subsurface safety device has been immobilized and must be placed back in operation after all remedial service work has been finalized. FAILURE TO PLACE THE TRIV BACK IN SERVICE WILL RESULT IN THE WELL BEING LEFT IN AN UNSAFE CONDITION. VOI
To restore the TRIV to normal service the TLO is used to shift the TRIV flow tube back into the standard operating position. For full dual barrier operation of the system, the VOi variable choke must be placed back in the TRIV injection safety valve with the GS or PRS pulling tool set to shear release with downward jarring.
Copyright Tejas Research & Engineering, LLC 2015, All rights reserved 9185 Six Pines Dr., The Woodlands, TX 77380 Phone: 281 466 8700
www.tejasre.com [email protected]
TRIV Dual Barrier Injection Safety System with Wireline Retrievable VOi
™
Option 2. The TRIV injection safety valve may be temporarily locked open with a specially designed separation sleeve. Like Option 1, the VOi variable choke must be removed using a GS or PRS type pulling tool. The separation sleeve is installed in the TRIV upper nipple profile using an appropriate running tool using standard wireline procedures. The separation tool seals in the upper and lower packing bores of the TRIV to isolate and protect the TRIV internal operating components. This sleeve protects the TRIV mechanism from being fouled or contaminated by debris and caustic and/or corrosive fluids. The use of a separation tool leaves a slightly restricted ID through the TRIV. Contact Tejas Research and Engineering for details on the restriction. VOi orifice size changes The VOi variable orifice choke is designed to automatically increase or decrease flow area in response to changes in the flow rate of the injected fluids. In the unlikely event that the VOi variable orifice choke becomes damaged it can v retrieved using a GS or PRS type pulling tool and standard wireline procedures. TRIV Dual Barrier Injection Safety System Size in. [mm]
Max. OD in. [mm]
Min. ID in. [mm]
Drift in. [mm]
Landing nipple
VOi landing profile
Bore in. [mm]
Type
Bore in. [mm]
Type
4.500 [114.3]
7.500 [190.5]
3.958 [100.5]
3.833 [97.4]
3.687 [93.6]
DB
3.687 [93.6]
X
5.500 [139.7]
8.500 [215.9]
4.670 [118.6]
4.545 [115.4]
4.437 [112.7]
DB
4.437 [112.7]
X
Separation sleeve Min ID in. [mm]
™ The Tejas logo is a trademark of Tejas Research a& Engineering LLC Direct request for quotations to: [email protected]
Copyright Tejas Research & Engineering, LLC 2015, All rights reserved 9185 Six Pines Dr., The Woodlands, TX 77380 Phone: 281 466 8700
www.tejasre.com [email protected]
Mild to Severly corrosive environments Formations requiring injection rates to 70,000 bpd [11,129 m3] Wells requiring injection pressure to 10,000 psi [68,948 kPa]
Benefits • • • • • • • •
Prevents uncontrolled well flow Eliminates choke size chatter by continually adjusting in response to a flow Prevents injection backflow Maximizes injection rates Provides dual barrier system Eliminates flapper throttling Reduces erosion from high rate injection flow Eliminates need for external control line
Features • • • • • • • • •
Tubing retrievable Subsurface controlled Wireline retrievable variable orifice choke Minimum pressure drop over entire injection rate range Erosion resistant materials in flow path Proven hard/soft seat flapper seal Orifice automatically adjusts in response to flow rate Designed in accordance with API 14A Metal to metal body joint
™
The Tejas TRIV™ dual barrier injection safety system is a tubing retrievable, subsurface controlled valve that features the VOi™ variable orifice choke. This valve features the VOi, a wireline retrievable, venturi type, variable orifice insert choke that controls valve opening and the rate of injection. This safety system is certified under the American Petroleum Institute (API) Specification 14A-0032. The Tejas VOi variable orifice system is designed to cover the entire range of operator specified injection flow regimes. The VOi insert eliminates throttling and potential damage to the flapper and seat in the TRIV during initial opening and incidents of unplanned reduction in injection flow rate. Critical internal components of the VOi system and TRIV valve are made from specially hardened materials and feature special surface hardening treatment to mitigate the effects of erosion from high injection flow rates. The TRIV features two body joints which are metal-to-metal seal connections. The flapper sealing system uses the field-proven hard/soft seat combination to effect an initial low-pressure seal while providing a metal-to-metal final seal for high shutin pressures. The design of the TRIV provides a reliable, extremely versatile system that is virtually maintenance free. This dual barrier system, featuring the wireline retrievable VOi orifice venturi choke system, is designed to yield a 20-year service life. Its design is capable of injection rates to 70,000 bpd [11,129 m3] and 10,000 psi [68,948 kPa] working pressure. The TRIV features a temporary lock-open mechanism that is engaged using standard wireline procedures. The VOi venturi type variable orifice choke
Copyright Tejas Research & Engineering, LLC 2015, All rights reserved 9185 Six Pines Dr., The Woodlands, TX 77380 Phone: 281 466 8700
TRIV
www.tejasre.com [email protected]
™
TRIV Dual Barrier Injection Safety System with Wireline Retrievable VOi
can be retrieved via standard wireline procedures and the TRIV flapper will close providing well control during removal of the VOi insert. If further through tubing workover operations via wireline procedures, conductor line procedures, or coil tubing procedures must be done the TRIV flapper may be temporarily locked in the open position with wireline to facilitate these workover procedures.
The TRIV valve with VOI inserted is intially installed in the locked open position to allow baypass and ease of installation. Initial injection unlocks the TRIV/VOi assembly for normal operation.
The TRIV dual barrier injection safety system can be supplied with any customer specified nipple profile and will be supplied to meet any customer specified material requirements. System Operation TRIV operation and elimination of throttling The TRIV valve is a normally closed valve, opens in response to injection flow and has an unlimited setting depth. Injecting fluid from the surface, casuses the valve to open. The primary barrier is the TRIV flapper which blocks flow back fluid or produced fluids mingled with injected fluids when Injection ceases. The patented VOi variable orifice valve, which is the operating mechanism, is also normally closed. In contrast to a fixed orifice insert choke, the VOi insert opens and the variable orifice expands or contracts in flow area in response to increases or decreases in injection flow rate. During injection, the TRIV flapper is open and shielded by the flow tube before the VOi variable orifice begins to open. This operation eliminates flapper throttling. Throttling can permanently damage the flapper and its hard/soft seat combination and adversely effect the integrity of the flapper closure mechanism.
TRIV and VOi injection operation The VOi variable orifice insert’s primary operating components include of permanent magnets, power spring, orifice seat and variable orifice. In the closed position, the VOi magnets are coupled due to mutual magnetic attraction and the power spring force. The power springs main function is to close the orifice. The magnets mutual attraction keeps the orifice choke closed and the initial seal maintained. The initial unlocking and opening sequence of the TRIV flapper is injection initiated, when injection pressure against the closed choke in excess of 40 psi, the TRIV flow tube moves downward to compress the power spring and telescope the flow tube and place it in the operating position. Further injection pressure in excess of 40 psi activates the VOi, further seperates the magnets, compresses the power spring and moves the choke seat, choke and choke housing downward to open the variable choke and lock the TRIV and VOi flow tubes together. When injection flow ceases the variable choke insert returns to the fully closed position and the TRIV flow tube moves upward allowing the flapper to close.
Copyright Tejas Research & Engineering, LLC 2015, All rights reserved 9185 Six Pines Dr., The Woodlands, TX 77380 Phone: 281 466 8700
www.tejasre.com [email protected]
TRIV Dual Barrier Injection Safety System with Wireline Retrievable VOi
™
When injection resumes a differential pressure is created behind the closed choke to move the TRIV flow tube downward and fully open the flapper before injection flow is initiated. At a 40 psi differential the VOi choke and choke housing snap downward separating the magnets, compressing the VOi power spring and allowing the variable orifice to open to allow injection into the well. As injection flow increases the VOi power spring is further compressed to cause the orifice to open further allowing more fluid to be injected. The VOi choke insert also serves as a metering device which creates a constant compressive force on the TRIV power spring to make sure the TRIV flapper stays fully open and shielded by the TRIV flow tube until injection fully ceases. TRIV Service Operations Temporary lockout of TRIV Option 1. After retrieving the VOi variable choke with a GS or PRS type pulling tool the TRIV valve’s flow tube may be temporarily locked in the open position with a TRIV temporary lockout tool (TLO) using standard wireline procedures. Temporarily locking the TRIV in the open position leaves the well with a fully open unobstructed bore to perform through tubing service work with wireline, conductor line or coil tubing. When the TRIV is temporarily locked open the surface wellhead MUST be tagged out to visually signify that a subsurface safety device has been immobilized and must be placed back in operation after all remedial service work has been finalized. FAILURE TO PLACE THE TRIV BACK IN SERVICE WILL RESULT IN THE WELL BEING LEFT IN AN UNSAFE CONDITION. VOI
To restore the TRIV to normal service the TLO is used to shift the TRIV flow tube back into the standard operating position. For full dual barrier operation of the system, the VOi variable choke must be placed back in the TRIV injection safety valve with the GS or PRS pulling tool set to shear release with downward jarring.
Copyright Tejas Research & Engineering, LLC 2015, All rights reserved 9185 Six Pines Dr., The Woodlands, TX 77380 Phone: 281 466 8700
www.tejasre.com [email protected]
TRIV Dual Barrier Injection Safety System with Wireline Retrievable VOi
™
Option 2. The TRIV injection safety valve may be temporarily locked open with a specially designed separation sleeve. Like Option 1, the VOi variable choke must be removed using a GS or PRS type pulling tool. The separation sleeve is installed in the TRIV upper nipple profile using an appropriate running tool using standard wireline procedures. The separation tool seals in the upper and lower packing bores of the TRIV to isolate and protect the TRIV internal operating components. This sleeve protects the TRIV mechanism from being fouled or contaminated by debris and caustic and/or corrosive fluids. The use of a separation tool leaves a slightly restricted ID through the TRIV. Contact Tejas Research and Engineering for details on the restriction. VOi orifice size changes The VOi variable orifice choke is designed to automatically increase or decrease flow area in response to changes in the flow rate of the injected fluids. In the unlikely event that the VOi variable orifice choke becomes damaged it can v retrieved using a GS or PRS type pulling tool and standard wireline procedures. TRIV Dual Barrier Injection Safety System Size in. [mm]
Max. OD in. [mm]
Min. ID in. [mm]
Drift in. [mm]
Landing nipple
VOi landing profile
Bore in. [mm]
Type
Bore in. [mm]
Type
4.500 [114.3]
7.500 [190.5]
3.958 [100.5]
3.833 [97.4]
3.687 [93.6]
DB
3.687 [93.6]
X
5.500 [139.7]
8.500 [215.9]
4.670 [118.6]
4.545 [115.4]
4.437 [112.7]
DB
4.437 [112.7]
X
Separation sleeve Min ID in. [mm]
™ The Tejas logo is a trademark of Tejas Research a& Engineering LLC Direct request for quotations to: [email protected]
Copyright Tejas Research & Engineering, LLC 2015, All rights reserved 9185 Six Pines Dr., The Woodlands, TX 77380 Phone: 281 466 8700
www.tejasre.com [email protected]
