Automated Wellhead Tools
Technical Specifications
The table below shows typical specifications for our automated wellhead tool product range. Custom configurations available.
| Specification Parameter | Pneumatic | Hydraulic | Electric |
|---|---|---|---|
| Valve types | Gate, choke, ball | Gate, choke, ball, SSV | Gate, choke, ball |
| Pressure rating (psi) | 2,000 – 15,000 | 2,000 – 20,000 | 2,000 – 15,000 |
| Valve size (bore, inches) | 1-13/16 – 7-1/16 | 1-13/16 – 7-1/16 | 1-13/16 – 4-1/16 |
| Actuator output torque (Nm) | 500 – 10,000 | 1,000 – 50,000 | 300 – 5,000 |
| Operating medium | Instrument air / natural gas | Mineral oil / fire-resistant fluid | 24V DC / 110V AC / 230V AC |
| Fail-safe type | Spring-return | Spring-return / accumulator | Spring-return (battery backup) |
| Position feedback | Limit switches | Limit switches + 4–20 mA | Smart positioner + 4–20 mA + HART |
| Partial stroke test | Not typical | Optional | Standard (PVST) |
| Communication protocol | – | – | Modbus RTU, TCP/IP, HART, Wireless |
| Response time (full stroke) | 2–5 seconds | 3–10 seconds | 10–30 seconds |
| Ambient temperature | -20°C to +60°C | -40°C to +80°C | -40°C to +60°C |
| Enclosure rating | NEMA 4 / IP66 | NEMA 4 / IP66 | NEMA 4X / IP66 |
| Hazardous area rating | Class I, Div 1 / ATEX | Class I, Div 1 / ATEX | Class I, Div 1 / ATEX |
| API 6A PSL | PSL1 – PSL3G | PSL1 – PSL3G | PSL1 – PSL3G |
Applications
Our automated wellhead tools are deployed across:
| Application Sector | Key Automated Tools | Benefit |
|---|---|---|
| Onshore production wells | Electric actuated gate valves, choke valves | Remote operation, reduced truck rolls |
| Offshore platforms | Hydraulic actuated SSV, ESD valves | Fail-safe reliability, remote monitoring |
| Unconventional / shale | Pneumatic actuated manifold valves | Fast cycling, multiple-well control |
| Remote desert wells | Solar-powered electric actuators | No grid power, wireless SCADA |
| Arctic / extreme cold | Low-temperature hydraulic actuators | Reliable operation at -40°C |
| Sour gas / H2S wells | NACE-compliant actuated valves | Corrosion resistance, safe shutdown |
| Water injection / disposal | Automated on/off valves | Scheduled injection, overflow protection |
| Well testing operations | Remote-controlled choke manifold | Precision flow control from safe distance |
Product Types – Automated Wellhead Tool Range
| Product Category | Types Available | Actuation Options |
|---|---|---|
| Automated gate valves | Slab gate, expanding gate | Pneumatic, hydraulic, electric |
| Automated choke valves | Adjustable choke, positive choke | Pneumatic, electric |
| Surface safety valves (SSV) | Gate-type, ball-type | Hydraulic (fail-safe close) |
| Automated wellhead control panels | Local, remote, wireless | PLC + HMI + SCADA interface |
| Actuator retrofit kits | Bolt-on to existing manual valves | All three types |
| Solar power systems | Complete wellhead automation package | Electric actuators + 4G telemetry |
| Position monitoring sensors | Limit switches, potentiometers, encoders | Wired or wireless |
| ESD / HIPPS systems | Emergency shutdown logic solvers + actuators | Pneumatic or hydraulic |
We also offer complete wellhead automation skids – pre-engineered, pre-tested, and ready for drop-in installation at your wellsite.
Why Choose SJ Petro for Automated Wellhead Tools?
1. API 6A Certified – Full Traceability – All components manufactured to API Spec 6A with material test reports and pressure test records. Third-party witnessing available (ABS, DNV, Lloyd’s).
2. Three Actuation Technologies in One House – Pneumatic, hydraulic, and electric – we manufacture and integrate all three. No need to source actuators from one supplier and valves from another.
3. NACE / Sour Service Capability – Full material classes through HH, with NACE MR0175 certification for H2S / CO2 service. We can supply automated wellheads for the most aggressive corrosive environments.
4. Solar-Powered Solutions for Remote Operations – Our solar electric actuator systems eliminate diesel generator maintenance and fuel logistics. Proven in desert and mountain applications.
5. Smart Diagnostics & Predictive Maintenance – Electric actuators with onboard PVST, cycle counting, and torque trending. Reduce unplanned downtime and extend valve life.
6. Retrofit to Existing Manual Valves – Already have API 6A gate valves? We can supply bolt-on actuator kits to automate them. No need to replace your entire wellhead inventory.
7. Global Service & Spares – 24/7 technical support from engineers familiar with wellhead automation. Regional spares hubs in Houston, Dubai, and Singapore.
8. Sinopec Backing – Long-Term Commitment – As a Sinopec subsidiary, we have the financial strength and engineering resources to support your automated wellhead needs for decades.
Frequently Asked Questions (FAQ)
Q1: What is the difference between pneumatic, hydraulic, and electric actuators for wellhead valves?
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Pneumatic – Uses compressed air or natural gas. Fast operation, simple design. Best where instrument air is available on site.
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Hydraulic – Uses pressurized fluid. Highest force output, excellent for high-pressure wellheads. Commonly used on offshore platforms.
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Electric – Uses motor-driven actuator. Precise positioning, low operating cost, smart diagnostics. Ideal for remote sites with solar/grid power.
Q2: Can your automated wellhead tools be retrofitted to my existing manual gate valves?
Yes. We offer actuator retrofit kits for most API 6A gate valve sizes and brands. The kit includes mounting bracket, coupling, and actuator. Field installation typically takes 2–4 hours per valve.
Q3: What is fail-safe actuation?
Fail-safe means the valve automatically moves to a predetermined safe position (open or closed) if power or control signal is lost. Spring-return actuators achieve this without batteries or accumulators. Required for safety-critical applications like ESD valves.
Q4: Do your actuators include position feedback?
Yes. Standard options include mechanical limit switches (open/closed), proximity sensors, and 4–20 mA position transmitters for continuous feedback. Electric actuators include smart positioners with HART or Modbus communication.
Q5: Can I control automated wellheads from my existing SCADA system?
Yes. Our electric actuators support Modbus RTU, Modbus TCP/IP, and HART protocols. Our control panels provide Ethernet/RS485 interfaces. We can integrate with most major SCADA platforms (Wonderware, Ignition, Rockwell, Siemens).
Q6: What power supply is required for electric actuators?
Standard options: 24V DC (solar/battery compatible), 110V AC, or 230V AC 50/60 Hz. For solar-powered remote sites, we provide complete solar array + battery storage + charge controller packages.
Q7: What is the operating temperature range?
Standard: -20°C to +60°C. Arctic package: -40°C to +40°C (special seals, synthetic lubricants, heaters). High-temperature package: up to +80°C for desert applications.
Q8: Are your automated wellhead tools suitable for sour gas (H2S) service?
Yes. We offer full NACE MR0175 / ISO 15156 compliance. Specify material class EE, FF, or HH at time of order for H2S and CO2 service.
Q9: What is partial valve stroke test (PVST) and why is it important?
PVST is a diagnostic function that moves a valve through a partial stroke (typically 10–20%) to verify mechanical integrity without fully closing the valve and interrupting production. Required by safety standards for ESD valves in many jurisdictions. Our electric actuators include PVST as standard.
Q10: Do you provide explosion-proof (hazardous area) ratings?
Yes. All our actuators and control cabinets are available with Class I, Div 1/2 or ATEX Zone 1/2 ratings. Specify your hazardous area classification at time of order.
Q11: What is the typical lead time for automated wellhead tools?
Standard actuated valves (pneumatic/electric): 8–12 weeks. Custom configurations (special pressure rating, material class, or hydraulic actuation): 14–20 weeks. Retrofit kits: 6–8 weeks.
Q12: Do you provide training for operation and maintenance?
Yes. We offer 2-day on-site training covering: actuator operation, control system interface, troubleshooting, partial stroke testing, and preventive maintenance. Remote video training also available.
