Technical Specifications
The XJ350 battery energy storage workover rig is designed for medium-depth well servicing operations with a rated hook load of 600 kN and a maximum static hook load of 900 kN. Below are the comprehensive technical specifications:
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Parameter
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XJ350 Battery Energy Storage Workover Rig
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Power Architecture
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Grid + Lithium Iron Phosphate Battery Energy Storage
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Rated Hook Load
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600 kN (134,900 lbf)
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Max. Static Hook Load
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900 kN (202,330 lbf)
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Workover Depth (2-7/8″ DP)
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3,200 m (10,500 ft)
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Workover Depth (3-1/2″ DP)
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2,500 m (8,200 ft)
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Servicing Depth (2-7/8″ EUE Tubing)
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4,000 m (13,120 ft)
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Traveling System
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3×4
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Wireline Diameter
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Φ26 mm (1″)
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Hook Hoisting Speed
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0.25–1.4 m/s (0.82–4.6 ft/s)
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Mast Height
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21–31.7 m (69–104 ft) – two-section hydraulic telescopic
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Chassis Drive Configuration
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8×8 full-drive
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Overall Dimensions (L×W×H)
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14.1–18.5 × 2.55–2.9 × 4.0–4.2 m
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Total Mass
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37,000–51,000 kg
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Max. Travel Speed
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45 km/h (28 mph)
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Max. Gradeability
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30%
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Minimum Ground Clearance
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310 mm
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Minimum Turning Diameter
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24 m
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Battery Type
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Lithium Iron Phosphate (LiFePO₄)
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Energy Storage System
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Power control cabinet, power transformer, remote operating table, energy storage bank
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Emissions
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Zero on-site emissions
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Automation Options
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Power catwalk, hydraulic pipe box, hydraulic elevated driller's cabin, iron roughneck
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Applications
The XJ350 battery energy storage workover rig is deployed across a broad spectrum of oilfield operations:
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Light to Medium Workover Operations – Sand flushing, pump inspection, paraffin removal, fishing for simple lost objects, and tubing/downhole tool replacement
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Well Servicing & Maintenance – Routine maintenance, tubing replacement, and pump repairs for production wells
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Oil Testing & Fishing – Precision retrieval of downhole tools and equipment
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Locations with Insufficient Grid Capacity – Battery storage compensates for grid power limitations, enabling full-performance operations even on low-capacity site power
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Environmentally Sensitive Areas – Zero-emission operation for urban-adjacent fields, national parks, and protected zones
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Remote & Off-Grid Locations – Battery-backed operation reduces dependence on fuel supply logistics
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Desert & Challenging Terrain – 8×8 full-drive chassis provides excellent off-road mobility
Product Types
SJ Petro offers the XJ350 in multiple energy configurations to match various operational requirements:
1. Grid + Battery Energy Storage XJ350 – The flagship configuration featuring lithium iron phosphate battery storage that supplements grid power during peak loads. Ideal for locations with limited grid capacity.
2. Full-Electric XJ350 (BEV) – Pure battery-electric configuration for zero-emission operations independent of grid connection.
3. Grid-Powered XJ350 (Net-Electric) – Direct connection to site power for continuous operation in fields with established grid infrastructure.
4. Oil-Electric Dual-Drive XJ350 – Flexible hybrid configuration that can switch between diesel and electric power, providing operational redundancy.
5. LNG-Powered XJ350 – Clean-burning natural gas option for regions with abundant gas supply.
6. Supercapacitor Energy Storage XJ350 – Enhanced configuration using supercapacitor modules for rapid charge/discharge response and superior regenerative energy capture.
7. Single Drum XJ350 – Standard configuration with 8×8 full-drive chassis.
8. Double Drum XJ350 – Enhanced configuration with 10×8 chassis for more demanding operations.
OEM & Customization Solutions
Every oilfield presents unique challenges, and SJ Petro's engineering team delivers tailored solutions through our comprehensive OEM and customization capabilities:
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Customized Power Configurations – Choose from grid+battery, full-electric (BEV), grid-only, dual-drive, LNG, or supercapacitor configurations to match your site infrastructure and operational priorities.
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Custom Chassis & Mobility – We adapt chassis specifications and drive configurations (8×8 or 10×8) to suit your specific terrain and transport requirements.
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Battery Capacity Options – Select battery storage capacity based on your specific operational requirements and grid conditions.
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Automation Package Selection – Choose from manual to semi-automated to fully automated configurations, including power catwalk, hydraulic pipe box, hydraulic elevated driller’s cabin, and iron roughneck.
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Modular Component Choice – Choose single drum or double drum configurations, mast heights (21m, 25m, 29m, or 31m), traveling systems, and well control equipment.
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Climate-Specific Engineering – We offer specialized configurations for desert, arctic, tropical, and mountain terrain operations.
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Turnkey System Integration – From basic workover units to fully integrated packages with complete well control and solids control systems.
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Spare Parts & Aftermarket Support – All supporting equipment and spare parts are available separately, ensuring long-term maintainability.
Why Choose SJ Petro?
Pioneer in Battery Energy Storage Workover Technology
SJ Petro has been at the forefront of developing grid+energy storage workover rigs, pioneering the integration of lithium iron phosphate battery systems with electric drive technology. Our battery energy storage workover rigs address the critical challenge of insufficient grid capacity at old well sites—a common barrier to electric rig adoption.
Proven Track Record – 2,600+ Rigs Manufactured
Since developing China's first domestically manufactured workover rig, 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 key core technologies including DC microgrid energy balance control, grid-storage协同 control, and battery management systems. Our battery energy storage workover rigs have earned over 50 patents.
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 workover rigs 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.
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 the XJ350 battery energy storage rig?
A: The XJ350 achieves a workover depth of 3,200 meters with 2-7/8″ drill pipe and 2,500 meters with 3-1/2″ drill pipe. The servicing depth with 2-7/8″ EUE tubing is 4,000 meters.
Q: What type of battery does the XJ350 energy storage system use?
A: The XJ350 is equipped with a lithium iron phosphate (LiFePO₄) battery system. This chemistry offers superior thermal stability, longer cycle life, and enhanced safety—critical for oilfield operations in remote and harsh environments.
Q: How does the battery energy storage system work?
A: The system operates on DC bus voltage control technology, working in parallel with the wellsite transformer. When grid capacity is insufficient during peak power demands (such as heavy lifting), the battery storage system instantly compensates with supplementary power. This ensures full operational performance regardless of site power limitations.
Q: What happens if the grid power is completely unavailable?
A: The XJ350 battery energy storage rig can operate on battery power alone for a limited duration. For extended off-grid operations, we recommend our full-electric (BEV) or oil-electric dual-drive configurations.
Q: Can the XJ350 battery rig also perform drilling operations?
A: Yes. When equipped with a rotary table, swivel, and drilling tools, the XJ350 can serve as a mobile drilling unit for shallow-to-medium depth wells.
Q: What automation features are available?
A: The XJ350 can be equipped with automation systems including power catwalk, hydraulic pipe box, hydraulic elevated driller's cabin, and iron roughneck.
Q: Are your products API certified?
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 (grid+battery, full-electric, dual-drive, LNG, supercapacitor), chassis specifications, automation packages, drum configuration, and climate-specific engineering.
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—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.
Q: Can the battery rig operate in extreme weather conditions?
A: Yes. Our rigs are engineered for reliable performance from -45°C to +50°C with battery thermal management systems ensuring optimal operating temperatures in extreme climates.
Q: What are the environmental benefits of the battery energy storage rig?
A: The XJ350 battery energy storage workover rig delivers zero on-site emissions, significantly reduced noise levels, and eliminates diesel fuel consumption during operations—making it ideal for environmentally sensitive areas and regions with strict emissions regulations.
Tag: Wellhead tools | Inter-well moving device | Cluster well rig movement | Inter-well moving technology | Inter-well moving manufacturers | Heavy duty inter-well moving
