Workover Rigs

Technical Specifications

SJ Petro manufactures a comprehensive range of self-propelled workover rigs covering all tonnage classes. Below are the key specifications for our core models:

Model	XJ250	XJ350	XJ450	XJ550	XJ650	XJ1000	XJ1200
Workover Depth (2-7/8″ DP)	2,000m	3,200m	4,500m	5,800m	7,000m	8,000m	9,000m
Workover Depth (3-1/2″ DP)	—	2,500m	3,500m	4,500m	5,500m	6,500m	7,500m
Nominal Hook Load	400 kN	600 kN	800 kN	1,000 kN	1,200 kN	1,500 kN	1,800 kN
Max. Static Hook Load	675 kN	900 kN	1,125 kN	1,350 kN	1,470 kN	1,800 kN	2,250 kN
Drawworks Horsepower	250 hp	350 hp	450 hp	550 hp	650 hp	750 hp	1,000 hp
Mast Clearance Height	21 m	31.7 m	34 m	34 m	35 m	38 m	39.3 m
Rig Floor Height	2.2 m	3.7 m	3.7 m	4.5 m	4.5 m	6 m	6.7 m
Travelling System	3×4	3×4	4×5	4×5	4×5	5×6	5×6
Carrier Drive Type	6×6	10×8	10×8	10×8	12×8	14×8	14×10
Wireline Diameter	φ22 mm	φ26 mm	φ26 mm	φ26 mm	φ29 mm	φ29 mm	φ32 mm

Additional Model Specifications (XJ450):

Parameter	XJ450 Specification
Servicing Depth	5,500m (2-7/8″ EUE Tubing)
Rated Hook Load	800 kN (179,850 lbf)
Max. Hook Load	1,125 kN (252,900 lbf)
Hook Hoisting Speed	0.25–1.4 m/s
Overall Dimensions (L×W×H)	18.5×3.1×4.2 m
Weight	55,000 kg
Max. Travel Speed	45 km/h
Engine	Caterpillar C13, 325 kW (440 hp)
Transmission	Allison 4700 OFS
Drawworks Rated Power	235 kW (320 hp)
Brake System	KOBELT Disc Brake

Applications

SJ Petro workover rigs serve a wide spectrum of oilfield operations:

• Well Workover & Servicing – Routine maintenance, tubing replacement, and pump repairs for production wells

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

• Oil Testing & Fishing – Precision retrieval of lost tools and equipment from wellbores

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

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

• Desert & Remote Area Service – High-mobility truck-mounted configurations with superior off-road capability

• Arctic & Extreme Climate Operations - Reliable performance in -45°C to 50°C conditions

Product Types

SJ Petro offers a diverse portfolio of workover rig configurations to match every operational requirement:

1. Self-Propelled Truck-Mounted Workover Rigs (XJ Series) – Our flagship product line, integrating all systems on a heavy-duty carrier chassis for maximum mobility and rapid deployment.

2. Skid-Mounted Workover Rigs – Designed for offshore platforms and fixed installations, featuring modular skid construction and hydraulic lateral/ longitudinal movement for cluster well operations.

3. Trailer-Mounted Workover Rigs – Lightweight, towable configurations ideal for short-distance moves and operations in space-constrained locations.

4. Automated Workover Rigs – Equipped with robotic pipe handling, intelligent driller controls, and advanced safety systems for reduced crew requirements and enhanced operational efficiency.

5. Electric-Drive Workover Rigs – Grid-powered units offering lower operating costs, reduced emissions, and quieter operation for environmentally sensitive areas.

OEM & Customization Solutions

Every oilfield has unique challenges, and SJ Petro delivers tailored solutions through our comprehensive OEM and customization capabilities:

• Customized Chassis & Configurations – We adapt chassis specifications, engine selections, and transmission systems to match your specific terrain and operational requirements.

• Modular Component Selection – Choose from single drum, double drum, or electric drive single-shaft drawworks. Select power systems (diesel/electric), mast heights, and traveling system configurations to suit your depth and load needs.

• Well Control & Solid Control Integration – Our rigs can be outfitted with complete well control equipment and solid control systems as part of a turnkey solution.

• Systematic Setup & Packages – From basic workover units to fully integrated drilling & workover packages, we deliver complete operational solutions.

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

Why Choose SJ Petro?

Decades of Proven Expertise
Established in 1941 and relocated to Jingzhou in 1969, SJ Petro began manufacturing petroleum equipment in the 1970s. With over 40 years of continuous innovation, we have mastered the design and manufacturing technologies for drilling rigs, workover rigs, cementing units, and fracturing equipment.

Industry-Leading Manufacturing Capacity
Our 50,000 m² rig assembly yard features 24 rig-up positions and four offshore rig commissioning sites capable of 750-ton load testing. We produce 100 workover rigs, 100 drilling rigs, 120 cementing units, 80 fracturing units, and over 150,000 high-pressure manifolds annually.

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. We were among the first Chinese manufacturers to achieve API/ISO9001 international dual certification.

World-Class R&D Capability
Our Hubei provincial-certified technical center employs 314 dedicated R&D professionals across three research institutes. We are authorized to establish a post-doctoral research station and operate complete CAD/CAPP/PDM/ERP industrial information systems.

Global Track Record
SJ Petro workover rigs are deployed across China’s major oilfields and exported to markets including the United States, Malaysia, South America, Western Africa, and the Middle East. Our reputation for reliability and performance is recognized worldwide.

One-Stop Solution Provider
Beyond manufacturing, we offer equipment inspection, testing, and major overhaul services. From initial design to field service, SJ Petro delivers complete oil and gas exploration and production equipment solutions.

Top-Tier Industry Recognition
Ranked 2nd 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 your rigs can handle?
A: Our XJ1200 model reaches up to 9,000 meters with 2-7/8″ drill pipe. We offer a full range from shallow (XJ250: 2,000m) to ultra-deep (XJ1200: 9,000m) capabilities to match your specific well conditions.

Q: Can your workover rigs 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 for the XJ450 model. This dual-function capability offers excellent value for operators.

Q: What power options are available?
A: We offer both diesel engine drive and electric motor drive configurations. Electric-drive models provide lower operating costs and reduced emissions, ideal for long-term continuous operations or environmentally sensitive areas.

Q: Do you support OEM or customized orders?
A: Absolutely. We offer comprehensive customization services including chassis configuration, engine selection, drawworks type, mast height, and complete system integration. Contact us with your specific requirements and our engineering team will develop a tailored solution.

Q: Are your products API certified?
A: Yes. SJ Petro holds API certification and our rigs are designed and manufactured in compliance with API Spec Q1, 4F, 7K, 8C, RP500, and other international standards.

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: What is the typical travel speed of your truck-mounted rigs?
A: Maximum travel speed is approximately 45–60 km/h depending on model and configuration. All units are designed for safe highway transport with robust braking systems.

Q: Can your rigs 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.

Q: What is the minimum order quantity?
A: We welcome orders from single units to fleet quantities. Our flexible manufacturing capabilities accommodate both small-batch and large-volume production.

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