Series Electric-drive Automated Workover Rigs

Technical Specifications

SJ Petro offers a complete line of electric-drive and automated workover rigs, with maximum static hook loads ranging from 300 kN to 2,250 kN and workover depths up to 9,000 meters. Below are the key specifications for our electric-drive and automated series:

Model	XJ250BEV	XJ350BEV	XJ450E	XJ550E	XJ650E	XJ900E	XJ1000E	XJ1200E
Drive Type	Full-Electric	Full-Electric	Electric	Electric	Electric	Full-Electric	Electric	Electric
Workover Depth (2-7/8″ DP)	2,000m	3,200m	4,500m	5,800m	7,000m	8,000m	8,000m	9,000m
Workover Depth (3-1/2″ DP)	—	2,500m	3,500m	4,500m	5,500m	6,500m	6,500m	7,500m
Max. Static Hook Load	675 kN	900 kN	1,125 kN	1,350 kN	1,470 kN	1,800 kN	1,800 kN	2,250 kN
Installed Power	—	360 kW	235–470 kW	470 kW	630 hp	—	750 hp	1,000 hp
Chassis Drive	8×4	8×8	10×8	10×8	12×8	8×8	14×8	14×10
Max. Driving Range	—	—	—	—	—	80 km	—	—
Energy Savings vs. Diesel	65%+	65%+	65%	65%	65%	68%	65%	65%
Emissions	Zero	Zero	Zero	Zero	Zero	Zero	Zero	Zero
Automation Level	Semi-Auto	Fully-Auto	Fully-Auto	Fully-Auto	Fully-Auto	Fully-Auto	Fully-Auto	Fully-Auto
Wellhead Operation	Manned	Unmanned	Unmanned	Unmanned	Unmanned	Unmanned	Unmanned	Unmanned

Additional Specifications – XJ900E Full-Electric Automated Workover Rig:

Parameter	Specification
Maximum Hook Load	90 tons (900 kN)
Chassis Configuration	8×8 all-electric heavy-duty
Maximum Driving Range	80 km
Grid Connection	30–50 kVA site transformer
Energy Management	"Grid-first” control strategy
Energy Savings	65% vs. conventional diesel
Emissions	Zero pollution, zero emissions
Wellhead Operation	Unmanned for light workover
Automation Equipment	Robotic pipe handling, iron roughneck, power slips, integrated control system

Applications

SJ Petro’s Series Electric-drive Automated Workover Rigs are deployed across a broad spectrum of oilfield operations:

• Routine Well Workover & Servicing – Tubing replacement, pump repairs, and production optimization for both onshore and offshore wells

• Deep & Ultra-Deep Well Intervention – Workover depths up to 9,000 meters for complex downhole operations

• Light & Medium Workover Operations – Unmanned wellhead capability for safe, efficient small-scale interventions

• Oil Testing & Fishing – Precision retrieval of downhole tools and equipment

• Shallow-to-Medium Depth Drilling – When equipped with rotary table and swivel, our rigs can perform mobile drilling operations up to 1,500 meters

• Offshore Platform Operations – Skid-mounted electric configurations for fixed platforms and jack-up rigs, with hydraulic skidding for multi-well access

• Environmentally Sensitive Areas – Zero-emission operation for urban-adjacent fields, national parks, and protected zones

• Remote & Off-Grid Locations – Battery-powered driving range of 80 km for access to wells without permanent grid infrastructure

Product Types

SJ Petro offers a comprehensive range of electric-drive and automated workover rig configurations to match every operational requirement:

1. Full-Electric Drive Automated Workover Rigs (SXJ Series) – Our flagship product line featuring complete electrification from chassis to drawworks. Zero emissions, 65–68% energy savings, and fully automated pipe handling for unmanned wellhead operation.

2. Grid-Powered (Net-Electric) Workover Rigs – Direct connection to site power for continuous, cost-effective operation. Ideal for fields with established grid infrastructure.

3. Grid-Plus-Energy-Storage Workover Rigs – Equipped with supercapacitor or lithium iron phosphate battery storage (supplied by CATL) for peak power demands and grid-independent operation.

4. Oil-Electric Dual-Drive Workover Rigs – Flexible hybrid configurations that can switch between diesel and electric power, providing operational redundancy and transitional capability.

5. LNG-Powered Workover Rigs – Clean-burning natural gas option for regions with abundant gas supply.

6. Skid-Mounted Electric Workover Rigs – Designed for offshore platforms and fixed installations, featuring modular skid construction and hydraulic movement systems for cluster well operations.

7. Automated Workover Rig Retrofits – We can upgrade existing diesel workover rigs with electric drive systems and automation packages, delivering significant energy savings and operational improvements without full equipment replacement.

OEM & Customization Solutions

Every oilfield presents unique challenges, and SJ Petro’s engineering team delivers tailored solutions through our comprehensive OEM and customization capabilities:

• Customized Power Configurations – Choose from full-electric, grid-powered, energy-storage, dual-drive, or LNG options to match your site infrastructure and operational priorities.

• Custom Chassis & Mobility – We adapt chassis specifications, drive configurations (6×6 through 14×10), and suspension systems to suit your specific terrain and transport requirements.

• Automation Package Selection – Select from semi-automated to fully automated configurations, including robotic pipe handlers, iron roughnecks, power slips, hydraulic catwalks, and intelligent driller control consoles.

• Modular Component Choice – Choose drawworks configurations (single drum, double drum, or electric drive single-shaft), mast heights, traveling systems, and well control equipment to match your depth and load specifications.

• Climate-Specific Engineering – We offer specialized configurations for desert, arctic (-45°C), tropical (+50°C), and mountain terrain operations.

• Turnkey System Integration – From basic workover units to fully integrated drilling-and-workover packages with complete well control and solids control systems.

• Spare Parts & Aftermarket Support – All supporting equipment and spare parts are available separately, ensuring long-term maintainability and operational continuity.

Why Choose SJ Petro?

World-Leading Electric Workover Technology

SJ Petro developed the world’s first full-electric drive automatic workover rig (SXJ900E) and has pioneered the transition from diesel to electric power in the workover equipment industry. Our electric-drive automated workover rigs have earned the CIPPE Innovation Gold Award—the only exhibit to receive this honor.

Proven Track Record – 2,600+ Rigs Manufactured

Since developing China’s first domestically manufactured workover rig in the 1980s, SJ Petro has produced over 2,600 workover rigs of all types. We have built the largest workover equipment manufacturing base in China with a 50,000 m² rig assembly yard and 24 rig-up positions.

Industry-Leading R&D Capability

Our Hubei provincial-certified technical center employs 314 dedicated R&D professionals across three research institutes. We have mastered more than 10 key core technologies including DC microgrid energy balance control, power-supply-load balance technology, and integrated traveling-operation transmission technology. Our "Green Intelligent Electric Workover Complete Equipment Key Technologies and Applications” project received the 2025 Hubei Provincial Science and Technology Progress Award.

Rigorous Quality Certifications

SJ Petro holds API (American Petroleum Institute), ISO9001, and HSE management system certifications. Our designs and manufacturing processes comply with API Spec Q1, 4F, 7K, 8C, and RP500 standards.

Global Deployment

Our electric-drive automated workover rigs are deployed across China’s major oilfields and have been exported to more than 30 countries and regions worldwide, including the United States, Indonesia, Malaysia, South America, Western Africa, and the Middle East. In 2026, SJ Petro presented its electric workover solutions at the IPA Convex exhibition in Indonesia, engaging with over 50 regional oil companies and service providers.

One-Stop Solution Provider

Beyond manufacturing, we offer equipment inspection, testing, and major overhaul services. From initial design to field service and spare parts supply, SJ Petro delivers complete oil and gas exploration and production equipment solutions.

Top-Tier Industry Recognition

Ranked among China’s Top 10 Petroleum Drilling and Production Equipment Manufacturers and rated AAA by China Petrochemical Industry and banks.

Frequently Asked Questions

Q: What is the maximum workover depth for your electric-drive automated rigs?

A: Our XJ1200E model reaches up to 9,000 meters with 2-7/8″ drill pipe. We offer a full range from shallow (XJ250BEV: 2,000m) to ultra-deep (XJ1200E: 9,000m) capabilities.

Q: How much energy can I save with an electric-drive workover rig?

A: Compared to conventional diesel-powered workover rigs, our electric-drive automated models reduce overall energy consumption by 65–68%. The regenerative braking system recovers over 70% of potential energy during pipe lowering operations.

Q: What is the driving range of the full-electric workover rig?

A: The SXJ900E model achieves a maximum driving range of 80 kilometers on a single charge. For longer distances or off-grid locations, we offer oil-electric dual-drive and grid-plus-energy-storage configurations.

Q: Can the rig operate without grid connection?

A: Yes. Our grid-plus-energy-storage models are equipped with lithium iron phosphate battery systems (supplied by CATL) that provide power for both driving and limited workover operations without grid connection. For extended off-grid workover operations, we recommend our oil-electric dual-drive configuration.

Q: How many crew members are required to operate the automated rig?

A: With the full suite of automation equipment, crew size can be reduced from five operators to just three. For light workover operations, the rig achieves unmanned wellhead operation.

Q: Are your electric rigs certified to international standards?

A: Yes. SJ Petro holds API, ISO9001, and HSE management system certifications. Our rigs are designed and manufactured in compliance with API Spec Q1, 4F, 7K, 8C, and RP500 standards.

Q: Do you offer OEM or customized solutions?

A: Absolutely. We offer comprehensive customization including power configuration (full-electric, grid, energy-storage, dual-drive, LNG), chassis and mobility specifications, automation package selection, and climate-specific engineering. Contact us with your requirements and our engineering team will develop a tailored solution.

Q: What is your manufacturing capacity and lead time?

A: We produce 100 workover rigs annually with a 50,000 m² assembly yard and 24 rig-up positions. Lead times vary by configuration and customization level—please contact our sales team for specific project timelines.

Q: Do you provide after-sales support and spare parts?

A: Yes. We offer comprehensive after-sales support including spare parts supply, equipment inspection, testing, and major overhaul services. Our global service network ensures reliable long-term maintainability.

Q: Can the electric rig operate in extreme weather conditions?

A: Yes. Our rigs are engineered for reliable performance in temperatures ranging from -45°C to +50°C, making them suitable for arctic, desert, and tropical environments. We offer specialized configurations for extreme climate conditions.

Q: Can your electric workover rig also perform drilling operations?

A: Yes. When equipped with a rotary table, swivel, and drilling tools, our rigs can serve as mobile drilling units for shallow-to-medium depth wells—up to 1,500 meters. This dual-function capability offers excellent value for operators.

Q: What is the noise level of the electric rig compared to diesel?

A: Operating noise is kept below 75 decibels, significantly lower than diesel-powered rigs and dramatically improving the working environment for rig crews and nearby communities.

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