API 6A Surface Test Tree / Flowhead — AISI 4130 alloy steel solid block, 10K–15K PSI, full-bore gate valves with master, swab, kill, and hydraulic failsafe flow line valves. NACE MR0175 H2S service.
CAMTOP Surface Test Tree / Flowhead | API 6A | 10K–15K PSI | H2S
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Description
API Surface Test Tree / Flowhead for Oil & Gas Well Testing
The CAMTOP Surface Test Tree / Flowhead is a solid-block surface control head designed for surface well testing, perforating, and wireline operations. It integrates a master valve, upper swab valve, kill line valve, and a hydraulically actuated flow line valve into a single rugged assembly. All valves are full-bore gate valves with metal-to-metal sealing for maximum reliability in H2S / CO2 service per NACE MR0175.
Located below the main valve block is a high-axial-thrust tubing swivel that allows tool-string rotation while under pressure. The test tree is rated for working pressures up to 15,000 psi and tensile loads up to 1,500,000 lb, making it suitable for the most demanding onshore and offshore well-testing campaigns.
Product Image
Key Features
- Solid Block Body — AISI 4130 alloy steel forged body eliminates leak paths and reduces weight versus flanged assemblies
- Full-Bore Gate Valves — Metal-to-metal sealing with elastomer assist for bubble-tight shut-off
- Hydraulic Failsafe Flow Line Valve — Closes automatically on hydraulic / power loss for safe well control
- High Axial Thrust Tubing Swivel — Allows tool-string rotation under full working pressure
- NACE MR0175 Sour Service — Qualified for H2S / CO2 environments per NACE and API 6A PSL-3
- Modular Quick Union — Upper and lower units coupled via load-bearing quick union for fast rig-up / rig-down
- Wireline Cutting Mechanism — Optional integral cutter in swab valve for emergency wireline recovery
- API 6A PSL-3, EE, PR1 / PR2 — Full material traceability and performance verification
- Range of Sizes — From 1 13/16″ through 7 3/8″ bore; control head sizes 2 1/16″ through 3 1/8″
- High-Temperature Option — Up to 400 °F for steam-injection or geothermal testing
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Type | Solid Block Flowhead / Surface Test Tree |
| Material | AISI 4130 Alloy Steel (forged) |
| Bore Size | 3 1/16″ (standard); range 1 13/16″ – 7 3/8″ |
| Pressure Rating | 10,000 psi / 15,000 psi (68.9 / 103.4 MPa) |
| Working Temperature | −20 °F to 250 °F (extended to 400 °F) |
| Service Rating | H2S & CO2 per NACE MR0175 |
| Design Standards | API 6A, PSL-3, EE, P+U; NACE MR01-075 |
| Max Tensile Rating | 435,000 – 1,500,000 lb @ 0 psi |
| Maximum Yield | 400,000 lb @ 10K psi WP; 635,000 lb @ 0 psi WP |
| Valve Type | Full-Bore Gate Valve (metal-to-metal + elastomer) |
| Top Connection | 5-3/4″ – 4 Stub ACME-2G-RH BOX |
| Bottom Connection | 5-3/4″ – 4 Stub ACME-2G-RH PIN |
| Kill Line Connection | 3″ Fig 1502 Female |
| Flow Line Connection | 3″ Fig 1502 Male |
| Sealing Mechanism | Elastomer-assisted, metal-to-metal between gate and seats |
| Tubing Swivel | High axial thrust, full-pressure rotation |
Available Configurations
| Model | Bore | Working Pressure | Service | Valve Configuration |
|---|---|---|---|---|
| CTT-3-5K-STD | 3 1/16″ | 5,000 psi | Standard | Master + Swab + Kill + Flow |
| CTT-3-10K-STD | 3 1/16″ | 10,000 psi | Standard | Master + Swab + Kill + Hydraulic Flow |
| CTT-3-15K-STD | 3 1/16″ | 15,000 psi | Standard | Master + Swab + Kill + Hydraulic Flow |
| CTT-3-10K-SOUR | 3 1/16″ | 10,000 psi | NACE MR0175 H2S | Master + Swab + Kill + Hydraulic Flow |
| CTT-3-15K-SOUR | 3 1/16″ | 15,000 psi | NACE MR0175 H2S | Master + Swab + Kill + Hydraulic Flow |
| CTT-3-15K-HT | 3 1/16″ | 15,000 psi | High-Temp 400 °F | Master + Swab + Kill + Hydraulic Flow |
Operating Principle
The Surface Test Tree is installed on top of the wellhead Christmas tree and provides the primary pressure-containment and flow-control barrier during well testing. Produced fluids enter the master valve and are directed through the upper swab valve to the flow line. The kill line valve allows circulation of kill-weight fluid to the annulus, while the hydraulically actuated flow line valve provides remote, failsafe-closed well control — automatically shutting in the well if hydraulic pressure or control signal is lost.
The high-axial-thrust tubing swivel installed below the valve block enables the operator to rotate the entire test string while under full working pressure — essential for wireline operations, tool-string manipulation, and stuck-pipe recovery.
Typical Applications
- Onshore and offshore surface well testing and flowback
- Drill-stem testing (DST) operations
- Perforating and wireline interventions
- Production testing and pressure-buildup surveys
- Sour-service (H2S / CO2) wells per NACE MR0175
- High-pressure, high-temperature (HPHT) well-testing campaigns
- Well control and emergency shut-in (ESD) integration
Why Choose CAMTOP
- Full API 6A PSL-3 Compliance — Every test tree is hydrostatically tested, function-tested, and supplied with full MTC / MTR traceability
- Modular Design — Quick-union coupling allows rig-up and rig-down in minutes versus welded assemblies
- Field-Proven Reliability — Trusted by operators across the Middle East, North Sea, Asia-Pacific, and Latin America
- Custom Configurations — Bore sizes, connection types, and actuator packages tailored to your well program
- Rapid Spare-Parts Support — Standard trim kits, seats, and gates available ex-stock for minimal downtime
- Engineering Partnership — Our engineering team supports HAZOP, torque / pressure calculations, and integration with your existing spread
Ordering Information
To request a quotation, please provide the following information:
- Bore size and working pressure rating
- Service environment (standard / sour / HPHT)
- Top and bottom connection types (ACME, Fig 1502, flanged, etc.)
- Valve configuration (manual vs hydraulic failsafe)
- Optional equipment (hand pump, hydraulic control unit, wireline cutter, transportation skid)
- Project location and certification requirements
Contact CAMTOP
For technical specifications, datasheets, and quotations, please contact our oilfield equipment sales team:
- 📧 Email: sales@cposl.com
- 📱 WhatsApp / Phone: 86-18621723891
- 📍 Address: Shanghai, China
- 🌐 Website: www.camtop-oilfieldtools.com
CAMTOP delivers premium surface well testing equipment with full API 6A traceability, fast lead times, and competitive pricing. Contact us today to discuss your next well-testing project.
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