Mobile truck mounted rig
Technical Specifications – SJ Petro Mobile Truck Mounted Rig Range
XJ Series Mobile Truck Mounted Workover Rigs
| Model | Workover Depth (2-7/8″ DP) | Max Hook Load | Engine Power | Chassis Drive | Mast Height |
|---|---|---|---|---|---|
| XJ150 | ~2,000m | 300 kN / 30 t | 235 HP | 6×4 | 18m |
| XJ250 | ~3,200m | 675 kN / 68 t | 350 HP | 8×4 | 21m |
| XJ350 | 3,200m | 900 kN / 90 t | 350–400 HP | 8×8 or 10×8 | 25–31m |
| XJ450 | ~5,500m | 1,125 kN / 113 t | 475 HP | 10×8 | 27m |
| XJ550 | ~6,500m | 1,350 kN / 136 t | 650 HP | 10×8 | 29m |
| XJ650 | ~7,500m | 1,580 kN / 158 t | 750 HP | 12×8 | 31m |
| XJ750 | ~8,500m | 1,800 kN / 180 t | 2 × 540 HP | 14×8 | 33m |
| XJ850 | ~9,500m | 2,000 kN / 200 t | 2 × 600 HP | 14×10 | 35m |
| XJ1200 | ~10,500m | 2,250 kN / 225 t | 2 × 630 HP | 14×10 | 38m |
XJ350 Mobile Truck Mounted Rig – Detailed Technical Parameters
| Parameter | Specification |
|---|---|
| Workover Depth (2-7/8″ DP) | 3,200 m (10,500 ft) |
| Servicing Depth (2-7/8″ EUE Tubing) | 4,000 m (13,120 ft) |
| Rated Hook Load | 600 kN (134,900 lbf) |
| Max Hook Load | 900 kN (202,330 lbf) |
| Traveling System | 3×4 with Φ26mm (1″) wireline |
| Derrick Height | 31.7 m (104 ft) – also available 25m or 29m |
| Racking Board Capacity | 4,000 m of 2-7/8″ EUE tubing |
| Engine Options | Caterpillar C9 (350 HP) or Detroit S60 (400 HP) |
| Transmission | Allison 4700 OFS or Allison M5610s |
| Carrier Drive | 8×8 (single drum) or 10×8 (double drum) |
| Max Travel Speed | 45 km/h (28 mph) |
| Total Weight | Approx. 51,000 kg (112,440 lb) |
| Overall Dimensions (L×W×H) | 18.5 × 2.9 × 4.2 m (61 × 9.5 × 13.8 ft) |
| Operating Temperature | Standard -20°C to +50°C (Arctic package available) |
| Compliance | API 4F, 7K, 8C, ISO 9001 |
Based on SJ Petro XJ350 published specifications.
ZJ Series Mobile Truck Mounted Drilling Rigs
| Model | Drilling Depth (4-1/2″ DP) | Max Hook Load | Engine Power | Chassis Drive | Mast Height |
|---|---|---|---|---|---|
| ZJ15 | 1,500 m | 1,125 kN / 113 t | 460 HP | 10×8 | 21–24m |
| ZJ20 | 2,000 m | 1,350 kN / 135 t | 480 HP | 10×8 | 24–27m |
| ZJ30 | 3,000 m | 1,700 kN / 170 t | 650 HP | 12×8 | 27–31m |
| ZJ40 | 4,000 m | 2,250 kN / 225 t | 2 × 630 HP | 14×10 | 24m |
| ZJ50 | 5,000 m | 3,150 kN / 315 t | 1,340 HP | Skid‑mounted only | – |
ZJ40 Mobile Truck Mounted Rig – Detailed Technical Parameters
| Parameter | Specification |
|---|---|
| Drilling Depth (4-1/2″ DP) | 4,000 m (13,120 ft) |
| Max Hook Load | 2,250 kN (505,800 lbf) |
| Engine Configuration | Dual Caterpillar C18 engines, each 630 HP |
| Transmission | Dual Allison M6620AR |
| Chassis Drive | 14×10 self‑propelled |
| Mast Type | Front‑open, double‑section telescoping, API 4F |
| Substructure | Two‑piece telescoping or parallelogram |
| Travel Speed | 45 km/h (28 mph) |
| Operating Temperature | -20°C to +50°C (Arctic package: -45°C) |
| Compliance | API 4F, 7K, 8C |
| Export Track Record | Delivered to Russia (Orenburg Drilling Company) |
Product Types – Choose Your Mobile Truck Mounted Rig Configuration
SJ Petro manufactures the complete XJ and ZJ series of mobile truck mounted rigs, with options for chassis, power, mast height, and automation level.
1. XJ Series Mobile Workover Rigs – Light to Ultra‑Deep
XJ150–XJ350 – Light to Medium Workover (Best for shallow wells, workover, pump checks)
The XJ350 is our best‑selling international model – hundreds are operating in Oklahoma, Texas and Kansas, where these rigs have become a familiar sight on well sites across the US.
XJ450–XJ650 – Heavy Workover & Light Drilling (Best for 5,000–7,500m workover, plus shallow drilling)
Dual‑purpose machines that can handle heavy pulling jobs and, with optional substructure, drill shallow development wells.
XJ750–XJ1200 – Ultra‑Deep Workover (Best for 8,000–10,500m HPHT wells)
Twin‑engine (2 × 540–630 HP) on 14×8 or 14×10 chassis. The XJ1200 reaches 10,500m workover depth – designed for deep gas fields.
2. ZJ Series Truck Mounted Drilling Rigs – 1,500m to 4,000m
ZJ15–ZJ30 – Shallow to Medium Drilling (Best for 1,500–3,000m, tight gas, CBM, development drilling)
True self‑propelled drilling rigs with full API certification.
ZJ40 – Flagship Mobile Drilling Rig (Best for 4,000m drilling, heavy workover to 7,000m)
14×10 chassis, dual Caterpillar C18 engines, dual Allison transmissions. Field‑proven. SJ Petro delivered three ZJ40 cold‑weather rigs to Russia’s Orenburg Drilling Company, designed specifically for arctic conditions.
3. Arctic Mobile Truck Mounted Rig
Best for: Siberia, Northern Canada, Alaska – anywhere standard rigs won’t start at -40°C.
Features: Pre‑heating systems, low‑temperature hydraulic fluids (-55°C pour point), engine block heaters, battery warmers, insulated control cabs.
Track record: Three ZJ40 arctic rigs operating in Russia – designed for year‑round use in extreme cold.
4. Custom & Specialized Mobile Rigs
We build truck mounted rigs for unusual applications – desert cooling packages, high‑altitude operation (4,000m+ elevation), offshore platform skid versions (not truck‑mounted), and specialty well service units. Bring us your specification.
Applications – Where Mobile Truck Mounted Rigs Excel
A mobile truck mounted rig isn’t designed to replace a massive land drilling spread on a large shale pad. But for a wide range of operations, it’s the most efficient and cost‑effective solution.
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Well workover & recompletion – pulling rods, tubing, pumps; fishing; scale removal; zone isolation. XJ350 and XJ550 models are ideal for these operations.
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Shallow to medium drilling – oil, gas, coalbed methane, water wells, and geothermal wells up to 3,000–4,000m. ZJ30 and ZJ40 handle full drilling programs.
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Cluster well development – move between closely spaced wellheads in hours, not days. Self‑propelled chassis eliminates crane and lowboy logistics.
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Remote exploration – access locations with poor roads or no crane support. 8×8 or 10×8 chassis provides traction in mud, snow, and sand.
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Heavy workover in deep wells – XJ850 and XJ1200 handle 8,000–10,500m depths in HPHT gas fields.
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Arctic drilling campaigns – winterized rigs for Siberia, Northern Canada, Alaska.
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Desert development – sand‑sealed components, oversized cooling, reinforced chassis for Middle Eastern operations.
Why Choose SJ Petro for Your Mobile Truck Mounted Rig?
Because a mobile rig is only valuable if it moves when you need it and works when it arrives – and because you need a partner who will support your rig for its entire life.
| What Other Manufacturers Offer | What SJ Petro Delivers |
|---|---|
| "Designed to API” (no certification) | Full API 4F, 7K, 8C monogram – documented and audited |
| Unknown engine brands | Caterpillar or Detroit engines – field‑proven, parts globally available |
| Limited or no overseas track record | 40+ years experience, rigs in USA, Russia, Middle East, Asia |
| Minimal after‑sales support | On‑site commissioning, training, 24/7 parts shipping, remote diagnostics |
| One‑size‑fits‑all configurations | Multiple chassis options (8×4 to 14×10), mast heights (25–31m), engine choices |
| Rig may not comply with local regulations | We work with your import authorities – certificates, inspections, documentation |
More reasons to trust SJ Petro:
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Sinopec Group heritage – over 40 years of truck mounted rig manufacturing, backed by one of the world’s largest energy companies
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Global export track record – mobile truck mounted rigs delivered to the United States, Russia, Kazakhstan, UAE, Saudi Arabia, Indonesia, and across Africa
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API 4F, 7K, 8C certified – full certification, not "designed to” claims
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In‑house manufacturing – we fabricate masts, assemble drawworks, and integrate controls – no outsourced quality surprises
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Integrated engineering support – on‑site commissioning, operator training, and maintenance training included with every rig
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Spare parts availability – we stock wear parts for all models, with 24‑hour emergency shipping available
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Flexible commercial terms – new rigs, refurbished trade‑ins, lease options, and milestone payment plans available
Frequently Asked Questions (FAQ) – Mobile Truck Mounted Rig
Q1: What is a mobile truck mounted rig?
A: A mobile truck mounted rig – sometimes called a truck‑mounted rig or self‑propelled drilling unit – is a complete drilling or workover unit permanently mounted on a self‑propelled truck chassis. Unlike skid‑mounted rigs that require separate trucks, cranes, and days of assembly, a mobile truck mounted rig drives itself to location, hydraulically raises its own mast, and is ready to work within hours. It’s an all‑in‑one solution for well workover, well servicing, and shallow to medium drilling.
Q2: What is the difference between XJ series and ZJ series mobile rigs?
A: XJ series – Primarily workover rigs, though some models can drill shallow wells (1,500–2,500m) when equipped with substructure. Designed for pulling tubing, rods, pumps, fishing, and remedial work. XJ350 is our best‑selling model, widely used in Oklahoma, Texas and Kansas.
ZJ series – Dedicated drilling rigs, capable of full‑depth drilling (3,000–5,000m). Heavier mast, larger drawworks, more powerful chassis. ZJ40 is our flagship mobile drilling rig, with dual Caterpillar engines and 14×10 chassis.
Q3: What depths can your mobile truck mounted rigs reach?
A: Our range covers the full spectrum:
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XJ350 – 3,200m workover depth (2-7/8″ DP), 4,000m servicing depth (2-7/8″ EUE tubing)
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XJ550–XJ650 – 6,500–7,500m workover depth
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XJ850–XJ1200 – 8,500–10,500m workover depth (ultra‑deep)
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ZJ15–ZJ40 – Drilling 1,500m to 4,000m with 4-1/2″ DP
Q4: Can a mobile truck mounted rig be used for both drilling and workover?
A: Yes. The XJ350 is a true dual‑purpose machine – workover as its primary function, but with a substructure and related parts, it can also drill shallow wells up to 1,500m. The ZJ series is primarily for drilling but can handle heavy workover operations. If you need one rig for both roles, the XJ350 is your answer.
Q5: What engines and transmissions do you use?
A: Standard engines are Caterpillar or Detroit Diesel, paired with Allison oilfield‑series transmissions. XJ350 options include Caterpillar C9 (350 HP) or Detroit S60 (400 HP) with Allison 4700 OFS or M5610s. ZJ40 uses dual Caterpillar C18 engines (630 HP each) with dual Allison M6620AR transmissions.
Q6: How fast does the rig travel on roads?
A: Maximum travel speed is 45 km/h (28 mph) for all XJ and ZJ series mobile truck mounted rigs in transport configuration. The chassis is designed for regional moves between well pads – enough to get the job done, not for highway racing.
Q7: How long does it take to rig up the mobile truck mounted rig?
A: With a trained crew of 4–5 people, typical rig‑up time is 4–6 hours for a ZJ40‑class rig. Smaller XJ‑series rigs can rig up in 3–4 hours. This includes driving onto the pad, leveling with hydraulic jacks, raising the mast, connecting fluid lines, and pressure testing.
Q8: Do your mobile rigs have API certification?
A: Yes. SJ Petro mobile truck mounted rigs are designed, manufactured, and tested to API Spec 4F (mast and substructure), API Spec 7K (drawworks and drilling equipment), and API Spec 8C (hoisting equipment). API monogram is available upon request for qualified applications.
Q9: Do you have mobile truck mounted rigs operating in the United States?
A: Yes. The XJ350 has been widely adopted in the United States, with hundreds of units operating across Oklahoma, Texas, and Kansas – many flying American flag‑colored derricks. We understand US road legal requirements, OSHA standards, and API certification needs. We can provide rigs that meet US specifications.
Q10: Can your mobile rigs operate in extreme cold?
A: Absolutely. SJ Petro delivered three ZJ40 cold‑weather mobile truck mounted rigs to Russia’s Orenburg Drilling Company, specifically designed for arctic areas. Features include pre‑heating systems, low‑temperature hydraulic fluids (pour point below -55°C), engine block heaters, battery warmers, and insulated control cabs. Operating temperature range is -45°C to +50°C.
Q11: What is the warranty on a mobile truck mounted rig?
A: 12 months after commissioning or 18 months after shipment – whichever occurs first. Coverage includes manufacturing defects on all components (chassis modifications, engine/transmission installation, drawworks, mast, hydraulics). Wear parts (brake bands, seals, filters) are not covered but are available as spares. Extended warranty options available.
Q12: Do you provide operator and maintenance training?
A: Yes. For every new mobile truck mounted rig purchase, we include one week of on‑site training during commissioning for up to five crew members. The training covers rig operation, maintenance procedures, safety protocols, and troubleshooting. Additional training (factory courses in Jingzhou, extended field training) is available at extra cost.
Q13: Can I buy a refurbished mobile truck mounted rig to save money?
A: Yes. We occasionally have trade‑ins from customers upgrading their fleets. Refurbished rigs are completely disassembled, inspected, fitted with new wear parts, repainted, load tested, and come with a 6‑month warranty. Typical price is 40–60% of new. Contact our sales team for current inventory.
