Innovation & Technical Strengths
We don’t just shrink drilling rigs. Our workover units are purpose-built for intervention efficiency. Here’s what makes SJ different:
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Compact mast with high hook load – Our masts are shorter than drilling rigs (for low wellhead clearance) but still deliver up to 2,250 kN lifting capacity. Perfect for rig-less platforms and congested well pads.
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Two-speed drawworks with hydraulic assist – Low gear for heavy pulling (fishing or stuck pipe), high gear for fast tripping. The hydraulic disc brake gives smooth control during precision operations like packer setting.
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Integrated mud circulation & cementing option – Many workover jobs need to circulate debris or squeeze cement. Our units come with a built-in mud pump and cementing manifold – no extra truck needed.
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Quick rig-up / rig-down system – Mast hydraulically raises in under 15 minutes. Outriggers and substructure are designed for one-person remote control. Shorter non-productive time means more revenue days.
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Offshore modular package – For jack-up or platform use, we split the workover rig into 3–5 skids (mast, drawworks, power pack, control cabin, mud pump). Each skid fits through standard hatch sizes and can be lifted by platform crane.
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Auto-driller for workover – Optional automated control of weight on hook and tripping speed. Reduces operator fatigue during long fishing jobs.
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Hydraulic pipe handling system – For larger workover rigs (XJ750 and above), we offer a hydraulic arm and catwalk to handle tubing safely. Fewer crew injuries, faster connections.
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Cold-weather & desert packages – Winterized hydraulics, heated operator cabin, and sand-resistant air filters available. Proven in Kazakhstan (‑40°C) and Saudi Arabia (50°C).
Technical Specifications – Representative Models
| Model | Mounting | Hook Load (kN / lbs) | Drawworks Power (hp) | Mast Height (m) | Depth Capacity (m, 2-7/8" tubing) | Auxiliary Features |
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| XJ250 | Truck | 300 / 67,000 | 180 | 18 | 2,500 (2,300) | Basic – light intervention |
| XJ350 | Truck | 450 / 101,000 | 250 | 21 | 3,500 (3,200) | Mud pump optional |
| XJ450 | Truck / Trailer | 600 / 135,000 | 350 | 24 | 4,500 (4,000) | Mud pump + cementing manifold |
| XJ550 | Truck / Trailer | 800 / 180,000 | 500 | 27 | 5,500 (5,000) | Hydraulic pipe handling (opt) |
| XJ750 | Trailer / Skid | 1,100 / 247,000 | 750 | 29 | 7,000 (6,500) | Full hydraulic handling, auto-driller |
| XJ1000 | Skid (offshore) | 1,350 / 303,000 | 1,000 | 31 | 8,500 (7,800) | Modular skid, marine coating |
| XJ1500 | Skid (offshore) | 2,250 / 506,000 | 1,500 | 36 | 10,000 (9,200) | Top drive ready, BOP handling |
Applications – Where Our Workover Rigs Are Used
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Mature onshore oilfields – Restoring production in wells with scale, paraffin, sand, or mechanical failures. Common in aging basins.
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Offshore platform well intervention – Replacing failed electric submersible pumps (ESPs) or gas lift valves without pulling the entire completion.
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Recompletion operations – Perforating new zones, isolating watered-out intervals, or converting to injectors for EOR.
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Fishing & stuck pipe retrieval – Our high hook load and fine brake control help recover broken tools or tubing.
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Sand cleanout – Using circulated fluid or bailing tools to remove sand fill from the bottom of the well.
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Casing patch & leak repair – Running and setting casing patches or scab liners.
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Plug & abandonment (P&A) – Small workover rigs are often the most economical for shallow to medium-depth abandonment.
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Geothermal well maintenance – Scaling and corrosion are common in geothermal wells. Our rigs handle the heavy pulling.
Why Choose SJ Petroleum Machinery for Workover Rigs?
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Sinopec subsidiary – long-term stability – We are not a fly-by-night supplier. Our parent company is one of the world’s largest oil & gas enterprises. You get supply chain security and after-sales commitment.
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Over 800 workover rigs delivered globally – Since the 1980s, SJ has supplied workover units to NOCs, majors, and independent operators in more than 30 countries.
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API 4F, 7K, 8C certified – Masts, drawworks, and lifting components are designed and manufactured to API specifications. Third-party inspections (ABS, DNV, etc.) are routine.
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In-house engineering for custom jobs – Tell us your wellhead height, crane capacity, available space, and power source (grid, genset, or PTO). We will design a rig that fits.
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Realistic delivery times – Standard truck-mounted XJ250–XJ550: 4–5 months. Larger skid units: 6–8 months. Rush orders possible for stocked components.
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Spare parts availability – We stock wear parts for drawworks, brakes, and hydraulics. Fluid end modules for mud pumps also available. Global shipping within 5–7 days.
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Operator training included – Two weeks of classroom and field training at your location or our factory. Focus on safety, maintenance, and troubleshooting.
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Competitive total cost of ownership – Our rigs are priced 15–30% lower than North American or European brands for similar specs. And our field service team is responsive.
Frequently Asked Questions (FAQ)
Q1: What is the difference between a workover rig and a drilling rig?
A: Workover rigs are smaller, faster to move, and designed for shallower depths (usually ≤10,000 ft). They focus on pulling tubing, not drill pipe. Drilling rigs are heavier and built for new hole-making.
Q2: Can your workover rig also drill new wells?
A: Some models (XJ750 and above) can drill shallow new wells (up to 3,000 ft) if equipped with a top drive. But for serious drilling, we recommend a dedicated drilling rig. Ask us about combo units.
Q3: How long does it take to rig up your truck-mounted workover rig?
A: A crew of 3–4 people can rig up a standard XJ450 from road transport to ready-to-operate in 2–3 hours. The hydraulic mast and outriggers cut setup time by 50% compared to older designs.
Q4: Do you offer offshore-certified workover rigs?
A: Yes. Our XJ1000 and XJ1500 skid units are designed for jack-up rigs or fixed platforms. We provide marine-grade coating, explosion-proof electricals, and DNV/ABS certification upon request.
Q5: What kind of warranty comes with the rig?
A: Standard 12 months from commissioning or 18 months from shipment, whichever comes first. Extended warranty options available for major mechanical components.
Q6: Can I get a workover rig with a top drive?
A: Yes, for larger models (XJ750+). A top drive allows you to rotate the tubing while pulling or running, which helps with stuck pipe and directional workover jobs.
Q7: How do I choose the right model for my mature field?
A: Send us your typical well depth, tubing size, maximum anticipated pull weight, and mobility needs (truck vs. skid). We will recommend a model and provide a technical datasheet.
Q8: Do you supply the mud pump and cementing equipment as part of the workover rig?
A: Yes. We can integrate a triplex mud pump (up to 600 HP) and a cementing manifold onto the same chassis or skid. Or we can supply separate units if you prefer.
Q9: How do you handle training for my local crew?
A: After delivery, our field service engineer spends up to 10 working days on-site. This covers safe rig-up, operation, daily inspection, and basic maintenance. We also provide manuals and video tutorials.
Q10: Can I get a used / refurbished workover rig at a lower price?
A: Yes, we sometimes have trade-in units from domestic operations. These are completely rebuilt with new hydraulic seals, brake linings, and wiring. Contact us for current inventory.
