1. **Dual CAT C18 Engine Power System**
Two imported CAT C18 engines (630 bhp each) paired with two Allison M6620AR transmissions. Mature double-engine compounding technology delivers the massive horsepower needed for ultra-deep well operations. Provides full redundancy — keep working if one engine needs service.
2. **14×10 Heavy-Duty Chassis**
Purpose-built 14×10 workover rig chassis — the largest chassis in our lineup. Designed to handle the extreme weight of the 39m tall mast, high-capacity drawworks, and dual-engine power system.
3. **39m Tall Telescoping Mast**
39m clean height — the tallest mast in our mobile workover rig lineup. Maximum static load capacity: 2,250 kN. Accommodates long tubing stands for maximum tripping efficiency on ultra-deep wells.
4. **2,250 kN Maximum Hook Load**
Industry-leading 2,250 kN maximum static hook load — the highest rating for any self-propelled workover rig. Handles the heaviest pulling loads on the deepest wells.
5. **Flagship Dual-Purpose Rig**
When configured with substructure and supporting accessories, this rig can handle both the heaviest workover operations and deeper drilling/completion work. It's the ultimate mobile rig for major oil field operations.
Applications
The 850HP workover rig is our flagship model — the maximum level of self-propelled workover rigs. It's engineered for the most demanding ultra-deep well operations and major workover projects on the largest oil fields.
- Primary use: ultra-deep well workover, heavy fishing, milling, and major completion work on the deepest producers.
- Suitable for both heavy workover operations and deeper drilling/completion work when configured with substructure.
- Deployed by major service companies on the largest onshore oil fields across the Middle East, Russia, and Central Asia.
The Ultimate Mobile Workover Rig
When you reach the 850HP class, you're at the absolute limit of what a truck-mounted workover rig can achieve. Beyond this point, you're looking at skid-mounted drilling rigs that require weeks to rig up and move between locations.
This rig gives you drilling-rig-level performance — 2,250 kN of hook load, 39m mast, dual CAT C18 engines — while retaining the mobility and fast rig-up times that make workover rigs so cost-effective. It's the difference between mobilizing a full drilling rig (weeks, huge cost) and mobilizing a mobile workover rig (hours, a fraction of the cost).
For major service companies operating on the deepest, most complex wells, this rig is a competitive advantage. It lets you take on work that smaller rigs simply can't handle, without the overhead and mobilization cost of a full drilling rig fleet.
Choosing the Right Workover Rig Size
For ultra-deep wells (7,000m+) or the heaviest fishing, milling, and completion work, the 850HP unit delivers the maximum power available in a mobile workover rig.
If your wells are shallower and operations are less demanding, the 750HP Workover Rig offers a more cost-effective solution. For drilling work beyond what even this flagship mobile rig can handle, you'll need to move up to our skid-mounted drilling rigs.
FAQs
Q: What makes this rig the flagship model?
A: It has the highest hook load (2,250 kN), tallest mast (39m), and largest chassis (14×10) in our mobile workover rig lineup. It represents the maximum level of self-propelled workover rigs.
Q: What power system does it use?
A: Dual imported CAT C18 engines (630 bhp each) paired with dual Allison M6620AR transmissions — mature double-engine compounding technology.
Q: Can it do drilling work?
A: Yes. When configured with substructure and supporting equipment, it can handle both heavy workover operations and deeper drilling/completion work.
Q: How does it compare to smaller rigs?
A: The 850HP is at the absolute upper limit of mobile workover rig capability. It offers drilling-rig-level power with workover-rig-level mobility — for the deepest, most demanding well servicing jobs.
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The type of traveling system
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5×6
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Diameter of rope
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Φ32
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Engine
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CAT C18/630 bhp, two sets
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The model of gear box
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Allison M6620AR, two sets
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Mast
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Clean height
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39m
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The max. static loading
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2250kN
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Draw work
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The max. pull of fast line
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280KN
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Diameter. of wire line
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32mm
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The max. rotate speed
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450rpm
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Drilling floor
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Height
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6m
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Model of rotary table
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ZP275
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