Synchronous rig manufacturers

Our Innovative Technology: What Makes SJ Petro’s Synchronous Rig Different

1. Permanent Magnet Direct Drive – No Gearbox, No Fuss

At the core of our synchronous rig is the permanent magnet synchronous motor (PMSM) integrated directly into the drawworks and top drive. Unlike traditional asynchronous motors that require a bulky gearbox to step down speed and multiply torque, our direct-drive architecture connects the motor rotor directly to the main shaft.

What does that mean for you? 20–30% lower energy consumption, according to field data from comparable direct-drive systems. Less heat, less noise, and fewer components that can break.

2. Low-Speed, High-Torque Performance

One of the biggest headaches in deep drilling is maintaining stable torque at low speeds. Traditional systems struggle here – gears chatter, torque fluctuates, and the driller ends up fighting the equipment.

Our synchronous motor delivers full rated torque at zero speed. That means precise pipe handling, controlled make-up and break-out, and smoother tripping operations. Whether you’re drilling a 10,000-meter ultra-deep well or a shallow geothermal bore, the torque is there when you need it.

3. Embedded Liquid Cooling – Smaller Footprint, Better Reliability

Heat management is critical. Traditional air-cooled systems require large fans and generous ventilation – not ideal for compact offshore rigs or harsh desert environments where dust clogs everything.

We use an embedded liquid cooling system that pulls heat away efficiently from the motor windings. The result: a smaller overall cooling system, lower noise, and better performance in high-ambient temperatures. It’s one less thing to worry about when the rig is running 24/7.

4. One-Button Automation & Intelligent Driller Interface

Your drillers don’t want to wrestle with complicated software. Our synchronous rig integrates intelligent control features that make complex operations simple:

• One-button drilling speed control – the system optimizes rate of penetration (ROP) automatically

• Toroidal pendulum anti-stick-slip technology – suppresses PDC bit stick-slip vibration

• Main shaft positioning control – precise alignment for pipe handling

• Pre-failure diagnostics – sensors monitor key components and warn you before they fail

[Insert product image: Driller’s console with touchscreen interface showing real-time synchronous motor parameters]

5. Offshore-Ready & Ruggedized for Extreme Environments

Our synchronous rig systems are designed for both onshore and offshore applications, with marine-grade components and corrosion-resistant coatings. They’ve been deployed in:

• Arctic conditions (down to -45°C with cold-weather packages)

• Middle Eastern desert heat (up to +55°C)

• Offshore platforms in the South China Sea

• Jungle remote-access locations in Southeast Asia

Technical Specifications

Here’s a detailed look at the key parameters. Note: All specifications are customizable for your specific rig model and operational requirements.

Parameter	Specification
Drive Type	Permanent Magnet Synchronous Motor (PMSM), direct-drive, gearless
Rated Power Range	400 HP – 2,000 HP (customizable)
Max. Continuous Torque	Up to 92,200 ft-lbs (125,000 Nm)
Breakout Torque Capacity	Up to 120,000 ft-lbs
Speed Range	0 – 300 RPM (stepless, full torque at zero RPM)
Cooling System	Embedded liquid cooling (standard)
Motor Efficiency	≥ 96% (vs. ~85–90% for asynchronous + gearbox)
Energy Savings	20–30% reduction vs. traditional gear-driven systems
Hoisting Capacity	200 – 750+ tons
Drilling Depth Capacity	2,000 m – 15,000 m
Power Supply	AC 600V / 690V, 50/60Hz, variable frequency drive (VFD)
Control System	PLC-based with dual redundancy (optional)
Operating Temperature	-20°C to +55°C standard; cold-weather package to -45°C
Driller Interface	15–21 inch touchscreen + joystick controls
Safety Features	Anti-collision, safety interlocking, overload protection
Remote Monitoring	IoT-ready, supports 4G/5G/satellite data transmission
Compliance	API, ISO 9001, HSE, CCS marine certification (upon request)

Product Series

Our synchronous rig solutions come in multiple configurations to suit different applications:

Series	Drilling Depth	Rated Power	Key Features
SJ-SR-200	Up to 3,000 m	400 HP	Compact, cost-effective direct-drive; ideal for workover and shallow drilling
SJ-SR-300	4,000 – 7,000 m	600 – 1,000 HP	Full PMSM direct-drive; dual-load channel lifting system
SJ-SR-500	7,000 – 10,000 m	1,200 – 1,500 HP	High-torque, offshore-certified; redundant PLC control
SJ-SR-ULTRA	10,000 – 15,000 m	1,600 – 2,000+ HP	Ultra-deep drilling configuration; extreme environment package
SJ-SR-RETROFIT	Custom	Custom	Modular kit to upgrade existing gear-driven rigs to synchronous direct-drive

Application Fields

Where can you deploy our synchronous rig technology? Just about anywhere drilling happens.

Land Drilling

• Conventional oil and gas wells

• Shale gas and tight oil fields

• Coalbed methane (CBM) extraction

• Geothermal drilling

Offshore Drilling

• Jack-up rigs

• Fixed platforms

• Semi-submersibles

• Drillships

Specialized Applications

• Ultra-deep wells (10,000m+)

• High-temperature / high-pressure (HTHP) wells

• Arctic and sub-arctic environments

• Desert operations

Why Choose SJ PETROLEUM MACHINERY?

You’ve got options. Here’s why engineers and procurement teams worldwide are choosing SJ Petro:

1. Backed by Sinopec. As a wholly-owned subsidiary of one of the world’s largest oilfield equipment groups, our products are validated in China’s toughest drilling environments – including the Sinopec Shengli Oilfield and ultra-deep scientific exploration wells – before they reach international markets.

2. Full IP ownership, zero third-party dependency. Our synchronous drive technology and control architecture are developed entirely in-house. Unlike systems that rely on imported motors or licensed software, we control every line of code and every component spec. That means faster customization, lower lead times, and no technology transfer headaches.

3. Global track record. We’ve completed over 3,000+ international trade transactions, with major partners across Russia, Indonesia, India, Africa, and the Middle East. Our equipment is built to meet API, ISO, HSE, and customer-specific standards.

4. Real-world performance. Comparable direct-drive top drive systems have been shown to reduce energy consumption by 20–30% compared to asynchronous gear-driven alternatives. That’s not just a number – that’s real savings on your daily operating costs.

5. Cost-effective without compromising quality. Here’s the truth: a premium NOV or Canrig synchronous rig will cost you a fortune. Our systems deliver the same – often better – performance at 30–40% lower upfront cost, with shorter lead times and more responsive support.

6. Customization, not cookie-cutter. We don’t do "one-size-fits-all.” Your rig, your formation, your drillers’ preferences – we tailor the synchronous drive system to fit. Need a specific torque curve? A non-standard voltage? A driller console layout your team already knows? Tell us. We’ll build it.

7. 24/7 global technical support. Our engineers are on call. We provide onsite commissioning, remote diagnostics, spare parts supply, and comprehensive training. And because we’re not a huge bureaucracy, when you call, you get someone who actually knows your system.

Frequently Asked Questions (FAQ)

Q1: What exactly is a "synchronous rig”?

A synchronous rig uses permanent magnet synchronous motors (PMSM) as the primary drive for drawworks and top drive, eliminating the gearbox and its associated mechanical losses. "Synchronous” refers to the fact that the rotor turns at exactly the same speed as the stator’s magnetic field – no slip, no wasted energy. For drilling contractors, that means higher efficiency, lower maintenance, and better low-speed torque control.

Q2: How much energy can I really save by switching?

Based on field data from direct-drive PMSM systems already in operation, you can expect 20–30% lower energy consumption compared to traditional asynchronous motor + gearbox configurations. In high-power drilling operations, that adds up quickly – often covering the upgrade cost within 12–18 months.

Q3: Can you retrofit synchronous drive onto my existing rig?

Yes. We offer a modular retrofit solution (SJ-SR-RETROFIT series) that replaces your existing drawworks drive system with a PMSM direct-drive unit. The retrofit typically takes 4–8 weeks from engineering to commissioning, depending on the complexity of your existing rig layout. We handle everything from site assessment to final testing.

Q4: How does reliability compare to traditional gear-driven systems?

Fewer moving parts = fewer things to break. With no gearbox, no couplings, and no mechanical transmission components, the synchronous direct-drive system has a significantly lower failure rate. In extreme environments like the Russian Arctic, comparable systems have demonstrated zero failures even at -40°C.

Q5: Can the system operate in extreme temperatures?

Yes. Standard operating range is -20°C to +55°C. For colder climates (down to -45°C), we offer a cold-weather package featuring heated motor windings, low-temperature-rated lubricants, and insulated enclosures. Our synchronous drive technology has been successfully deployed in Russian and Canadian winter drilling programs.

Q6: What about offshore applications? Are your systems marine-certified?

Yes. We offer marine-grade configurations with corrosion-resistant coatings, IP-rated enclosures, and components certified to meet offshore classification society standards (ABS, DNV, CCS). Our systems are currently in service on jack-up rigs and fixed platforms in the South China Sea and Southeast Asian offshore fields.

Q7: Do you provide training for drillers and maintenance crews?

Absolutely. We provide comprehensive training packages including:

• Classroom sessions on PMSM theory and operation

• Simulator-based driller training

• Onsite hands-on commissioning support

• Remote refresher training via online platforms

• Detailed technical documentation and troubleshooting guides

Q8: What’s your typical lead time for a new synchronous rig or retrofit?

• New complete rig : 6–8 months from order confirmation

• New top drive / drawworks only : 4–6 months

• Retrofit installation : 2–4 months (including engineering, site prep, installation, commissioning)

Expedited options are available for urgent projects. Contact our sales team for current lead times.

Q9: Can you provide references from existing customers?

Yes. We can share case studies and customer references upon request. Our synchronous rig systems are currently operating in Sinopec’s Shengli Oilfield, African desert drilling programs, and Southeast Asian offshore projects. We’re happy to arrange technical discussions with existing customers where permitted.

Q10: What spare parts support do you offer internationally?

We maintain a global spare parts inventory with regional stock in key markets (Russia, Middle East, Southeast Asia). Standard spare parts can be shipped within 48–72 hours. Our technical support team provides remote diagnostics around the clock, and we can deploy field service engineers anywhere in the world within 7–10 days.