Technical Specifications
The XJ350 full-electric drive automated 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 Electric Workover Rig Specification
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Drive Type
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Full-Electric (BEV)
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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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Drilling Depth
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Up to 1,000 m (when equipped with rotary table)
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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
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Mast Height
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31.7 m (104 ft)
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Mast Type
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Front-open two-section hydraulic lifting telescopic
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Rig Floor Height
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3.7 m
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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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16.0 × 2.55 × 4.0 m
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Total Mass
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44,000 kg
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Energy Storage System
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Lithium iron phosphate battery (CATL)
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Energy Savings vs. Diesel
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~65%
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Emissions
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Zero (pure electric vehicle)
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Drum Configuration
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Single drum or double drum available
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Drawworks Auxiliary Brake
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Air-controlled disc brake
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Automation Level
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Modular automation with robotic closed-loop control
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Applications
The XJ350 full-electric drive automated workover rig is deployed across a broad spectrum of oilfield operations:
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Light to Medium Workover Operations – Ideal for shallow gas well 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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Shallow-to-Medium Depth Drilling – When equipped with a rotary table, the rig can perform drilling operations up to 1,000 meters
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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-powered operation eliminates dependence on fuel supply logistics
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Desert & Challenging Terrain – 8×8 full-drive chassis provides excellent off-road mobility
The XJ350 electric workover rig has been successfully deployed across China's major oilfields and continues to gain recognition in international markets for its innovative combination of electrification and automation.
Product Types
SJ Petro offers the XJ350 in multiple configurations to match various operational requirements:
1. Full-Electric Drive XJ350 (BEV) – The flagship model featuring complete electrification with lithium iron phosphate battery energy storage. Zero emissions, ~65% energy savings, and optional automation packages.
2. Grid-Powered XJ350 (Net-Electric) – Direct connection to site power for continuous, cost-effective operation. Ideal for fields with established grid infrastructure.
3. Oil-Electric Dual-Drive XJ350 – Flexible hybrid configuration that can switch between diesel and electric power, providing operational redundancy and transitional capability.
4. Grid-Plus-Energy-Storage XJ350 – Equipped with battery storage for peak power demands and grid-independent operation.
5. Single Drum XJ350 – Standard configuration with 8×8 full-drive chassis for light to medium workover operations.
6. Double Drum XJ350 – Enhanced configuration with 10×8 chassis for more demanding operations.
7. Automated XJ350 Workover Rig – Equipped with modular automation systems including robotic pipe handling, iron roughnecks, power slips, and integrated driller control consoles.
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 hybrid configurations to match your site infrastructure and operational priorities.
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Custom Chassis & Mobility – We adapt chassis specifications and drive configurations to suit your specific terrain and transport requirements. The XJ350 is available with 8×8 or 10×8 chassis configurations.
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Automation Package Selection – Select from manual to semi-automated to fully automated configurations, including robotic pipe handlers, iron roughnecks, power slips, hydraulic catwalks, and intelligent driller control consoles.
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Modular Component Choice – Choose single drum or double drum configurations, mast heights, traveling systems, and well control equipment to match your depth and load specifications.
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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 drilling-and-workover 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 and operational continuity.
Why Choose SJ Petro?
Pioneer in Electric Workover Technology
SJ Petro has been at the forefront of electric workover rig development, pioneering the transition from diesel to electric power in the workover equipment industry. The XJ350 BEV represents our commitment to innovative, sustainable, and cost-effective oilfield solutions.
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 key core technologies including electric drive systems, energy management, and automation control.
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. The XJ350 series, in particular, has gained strong recognition in the U.S. market.
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 2nd on the list of China 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 electric rig?
A: The XJ350 electric workover rig 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 BEV use?
A: The XJ350 BEV is equipped with a lithium iron phosphate battery energy storage system supplied by CATL, one of the world's leading battery manufacturers.
Q: How much energy can I save with the electric XJ350?
A: Compared to conventional diesel-powered workover rigs, the full-electric XJ350 reduces overall energy consumption by approximately 65%. The electric drive system delivers instant torque response and precise speed control, eliminating energy waste.
Q: What is the driving range of the XJ350 electric workover rig?
A: The XJ350 BEV is designed for practical field operations with sufficient range for both highway transport and wellsite access. For extended range requirements, we offer grid-powered and dual-drive configurations.
Q: Can the XJ350 electric 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—up to 1,000 meters. This dual-function capability offers excellent value for operators.
Q: What automation features are available?
A: The XJ350 can be equipped with modular automation systems including robotic pipe handling manipulators, iron roughnecks, power slips, hydraulic catwalks, and intelligent driller control consoles with self-diagnosis capabilities.
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, chassis and mobility specifications, automation package selection, drum configuration (single or double), 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 across a wide range of operating conditions, including arctic low-temperature and desert high-temperature environments. The battery thermal management system ensures optimal operating temperatures.
Q: What is the noise level of the electric rig?
A: The electric drive system operates significantly quieter than diesel-powered rigs, dramatically improving the working environment for rig crews and reducing noise impact on nearby communities.
Tag: Deep well drilling machinery | Dual well rig configuration | Dual well drilling efficiency | Advantages of dual well rigs | Automated wellhead equipment | Automated Wellhead Tools
