Technical Specifications
The SXJ350D (XJ900) electric drive workover rig delivers 90-ton maximum hook load capacity with full-electric propulsion and operation. Below are the comprehensive technical specifications:
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Parameter
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SXJ350D (XJ900) Electric Drive Workover Rig
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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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Drive Type
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Full-Electric (BEV)
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Chassis Configuration
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8×8 pure electric heavy-duty special chassis
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Max. Driving Range
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80 km (50 miles)
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Grid Connection
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30–50 kVA wellsite transformer
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Energy Management
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"Grid-first” control strategy
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Energy Savings vs. Diesel
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~65%
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Emissions
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Zero pollution, zero emissions
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Drawworks Horsepower
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350 hp
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Travelling System
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3×4
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Wireline Diameter
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Φ26 mm (1″)
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Mast Height
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31.7 m (104 ft)
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Rig Floor Height
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3.7 m (12 ft)
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Automation Level
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Fully automated with integrated control system
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Wellhead Operation
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Unmanned for light workover
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Applications
The SXJ350D electric drive workover rig is deployed across a broad spectrum of oilfield operations:
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Heavy-Duty Workover Operations – Tubing replacement, pump repairs, and major well interventions for production wells
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Light Workover Operations – Sand flushing, pump inspection, paraffin removal, fishing for simple lost objects – with unmanned wellhead capability
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Well Servicing & Maintenance – Routine maintenance and production optimization for both onshore and offshore wells
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Environmentally Sensitive Areas – Zero-emission, low-noise operation for urban-adjacent fields, national parks, and protected zones
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Remote & Off-Grid Locations – 80 km driving range eliminates dependence on fuel supply logistics
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Multi-Well Pad Operations – Rapid mobilization between wells with 8×8 all-terrain mobility
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Desert & Challenging Terrain – Heavy-duty 8×8 chassis provides excellent off-road performance
Product Types
SJ Petro offers the XJ900 series in multiple configurations to match various operational requirements:
1. Full-Electric Drive SXJ350D (XJ900) – The flagship model featuring complete electrification with 8×8 pure electric chassis, 80 km driving range, and full automation. Zero emissions, ~65% energy savings.
2. Grid-Powered XJ900 (Net-Electric) – Direct connection to site power for continuous operation in fields with established grid infrastructure.
3. Oil-Electric Dual-Drive XJ900 – Flexible hybrid configuration that can switch between diesel and electric power, providing operational redundancy.
4. Energy-Storage Grid-Electric XJ900 – Equipped with supercapacitor or battery storage for peak power demands and grid-independent operation.
5. Automated XJ900 Workover Rig – Fully automated configuration with integrated control systems for unmanned wellhead operation.
6. Specialized Configuration XJ900 – Available in desert, low-temperature, no-guyline, and self-tensioning guyline configurations.
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 full-electric (BEV), grid-powered, energy-storage, dual-drive, or specialized 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 standard) to suit your specific terrain and transport requirements.
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Automation Package Selection – Select from semi-automated to fully automated configurations with integrated control systems for unmanned wellhead operation.
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Specialized Engineering – We offer desert workover rigs, low-temperature workover rigs, no-guyline workover rigs, and self-tensioning guyline workover rigs.
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Modular Component Choice – Choose mast heights, traveling systems, and well control equipment to match your depth and load specifications.
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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?
World's First Full-Electric Drive Automated Workover Rig
SJ Petro developed the world’s first full-electric drive automated XJ900 workover rig, setting a new industry benchmark. Our electric drive technology platform spans multiple models and configurations, representing the most comprehensive electric workover rig portfolio in the industry.
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 comprehensive design, manufacturing, and testing capabilities.
Industry-Leading R&D Capability
SJ Petro has mastered key core technologies including electric drive systems, energy management, grid-storage coordination, and automation control. Our electric workover rigs have earned multiple patents and industry awards.
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, Colombia, 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 hook load of the SXJ350D electric workover rig?
A: The SXJ350D delivers a maximum static hook load of 900 kN (90 tons) with a rated hook load of 600 kN.
Q: What is the maximum workover depth?
A: The SXJ350D 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: How far can the rig travel on a single charge?
A: The SXJ350D achieves a maximum driving range of 80 kilometers (50 miles) on a single charge.
Q: How does the power system work during operation?
A: During workover operations, the rig connects to a 30–50 kVA wellsite transformer. The energy management system employs a "grid-first” control strategy, delivering "small grid connection, high-power output” – meaning the rig can deliver full 90-ton hoisting performance even with limited site grid capacity.
Q: How much energy can I save compared to a diesel rig?
A: The SXJ350D reduces overall energy consumption by approximately 65% compared to conventional diesel-powered workover rigs. This translates to substantial operational savings over the life of the equipment.
Q: What are the environmental benefits?
A: The SXJ350D delivers zero pollution and zero emissions throughout the entire operation cycle, with significantly reduced noise levels. This makes it ideal for environmentally sensitive areas and regions with strict emissions regulations.
Q: Can the SXJ350D perform drilling operations?
A: Yes. When equipped with a rotary table, swivel, and drilling tools, the SXJ350D can serve as a mobile drilling unit for shallow-to-medium depth wells.
Q: What automation features are available?
A: The SXJ350D integrates multiple new-generation automation devices with comprehensive safety control protection systems. Through the integrated control system, the rig achieves coordinated operation with unmanned wellhead capability for light workover jobs.
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 (full-electric, grid-powered, dual-drive, energy-storage), specialized configurations (desert, low-temperature, no-guyline), automation packages, and climate-specific engineering.
Q: What is your manufacturing capacity and lead time?
A: We have the largest workover equipment manufacturing base in China with comprehensive production capabilities. 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. Our global service network ensures reliable long-term maintainability.
Q: What specialized configurations are available?
A: SJ Petro offers specialized configurations including desert workover rigs, low-temperature workover rigs, no-guyline workover rigs, and self-tensioning guyline workover rigs.
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