Heavy duty oil drilling rigs
Technical Specifications – Heavy Duty Oil Drilling Rigs
| Parameter | ZJ70‑HD | ZJ90‑HD | ZJ120‑HD |
|---|---|---|---|
| Nominal depth (4‑1/2″ DP) | 7,000 m | 9,000 m | 12,000 m |
| Nominal depth (5″ DP) | 6,000 m | 8,000 m | 10,000‑11,000 m |
| Max. hook load (kN / t / lb) | 4,500 / 450 / 1,000,000 | 6,750 / 675 / 1,500,000 | 9,000 / 900 / 2,000,000 |
| Drawworks power (HP) | 2,000‑2,500 | 3,000‑4,000 | 4,000‑6,000 |
| Number of drawworks motors | 2 | 3 | 4 |
| Top drive capacity (t) | 500 | 750 | 900 |
| Top drive torque (Nm) | 50,000 | 70,000 | 80,000+ |
| Rotary table opening (in) | 37.5 | 49.5 | 60.5 |
| Mud pumps (quantity × HP) | 2‑3 × 1,600 | 2‑3 × 2,200 | 3 × 2,200 |
| Max. circulating pressure (MPa) | 35‑52 | 52‑70 | 52‑70 |
| Mast height (ft / m) | 146 / 44.5 | 160 / 48.8 | 170 / 51.8 |
| Substructure height (m) | 7.0‑9.0 | 9.0‑10.5 | 10.5‑12.0 |
| Drilling lines (quantity) | 12‑14 | 14‑16 | 16 |
| Main brake | Hydraulic disc | Hydraulic disc | Hydraulic disc |
| Auxiliary brake | Eddy current / regen | Eddy current / regen | Eddy current / regen |
| Drive type | AC VFD | AC VFD | AC VFD |
| Operating temperature | -40°C to +55°C | -40°C to +55°C | -40°C to +55°C |
| API compliance | 4F, 7K, 8C, Q1 | 4F, 7K, 8C, Q1 | 4F, 7K, 8C, Q1 |
| Approx. total weight (tonnes) | 350‑450 | 500‑650 | 700‑900 |
Product Types – Heavy Duty Oil Drilling Rigs
| Model | Depth | Hook Load | Key Applications | Special Features |
|---|---|---|---|---|
| ZJ70‑HD | 7,000 m | 4,500 kN | Deep gas, HPHT, shale gas (walking version) | Most cost‑effective heavy rig; walking system option |
| ZJ70‑HD‑AR | 7,000 m | 4,500 kN | Arctic / Siberia deep wells | -45°C low‑temp, GOST certified |
| ZJ90‑HD | 9,000 m | 6,750 kN | Ultra‑deep gas, Tarim Basin, Middle East deep development | 52 MPa mud, 14‑16 modules, walking option |
| ZJ90‑HD‑DT | 9,000 m | 6,750 kN | Middle East desert | 55°C sand‑sealed, oversized cooling |
| ZJ120‑HD | 12,000 m | 9,000 kN | Continental deep drilling, extreme frontiers | World‑class capacity, 16‑module pin‑connected |
| ZJ120‑HD‑OS | 12,000 m | 9,000 kN | Offshore platform / jackup | Marine coatings, ABS/DNV, compact layout |
Optional equipment for all heavy duty models:
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Hydraulic walking system (ZJ70‑HD, ZJ90‑HD) – moves entire rig between pad wells without dismantling.
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High‑pressure mud package (70 MPa / 10,000 psi) – for extreme HPHT wells.
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Automated pipe handling – catwalk, iron roughneck, racking arm rated for heavy pipe.
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Remote monitoring & digital twin – real‑time data transmission, predictive maintenance.
Applications – Where Heavy Duty Rigs Are Essential
| Application | Why Heavy Duty Rig | Typical Depth | Market Context |
|---|---|---|---|
| Ultra‑deep gas (Tarim Basin, Sichuan) | Depths exceeding 8,000 m, HPHT conditions require 6,750‑9,000 kN hook load and 52+ MPa mud systems. | 7,000‑10,000 m | China's first 10,910 m well drilled with ZJ120‑HD rig. |
| Middle East deep gas (Kuwait, Saudi Arabia) | Deep reservoirs require rigs capable of 6,750 kN hook load in 55°C desert conditions. | 5,000‑9,000 m | SJ Petro delivered 6 × ZJ90‑HD rigs to Kuwait Oil Company. |
| Siberian / Russian Arctic deep drilling | Permafrost and extreme cold (-45°C) require low‑temp steel, heated systems, and GOST certification. | 4,000‑7,000 m | 11 × ZJ40‑HD (arctic) rigs delivered to Rosneft. |
| Deep HPHT reservoirs (Gulf of Mexico, North Sea onshore analogs) | High pressure (100‑150 MPa) and high temperature (200°C+) demand heavy‑duty BOP, mud systems, and casing. | 5,000‑8,000 m | HPHT well equipment market projected USD 8.9B by 2033. |
| Extended‑reach drilling (ERD) | Long laterals (5,000‑8,000 m horizontal) require high hook load to overcome friction and heavy BHA. | 4,000‑8,000 m vertical + lateral | Heavy top drive (750‑900 t) essential for extended reach. |
| Heavy casing / large diameter wells | Running 13‑3/8″ or 20″ casing strings weighing 500+ tons requires hook load capacity beyond standard rigs. | 2,000‑5,000 m | Heavy rigs handle casing with safety margin. |
Why Choose SJ Petro for Heavy Duty Oil Drilling Rigs?
1. We Build the Heaviest Land Rigs in the Industry
SJ Petro's ZJ120‑HD is one of the most powerful land drilling rigs available globally – 9,000 kN hook load, 6,000 HP drawworks, 12,000 m depth rating. Few manufacturers offer this class of rig. We do, and we have field‑proven it.
2. Field‑Proven in the World's Deepest Wells
The ZJ120‑HD heavy duty drilling rig was used to drill Asia's first 10,910‑m ultra‑deep well – the second deepest onshore well ever drilled globally. That is not a theoretical rating; it is a certified field achievement.
3. Full API Certification + Third‑Party Witnessing
All heavy duty rigs are designed and manufactured to API 4F, 7K, 8C, Q1. Full documentation – material certs, weld maps, NDT reports, pressure test records – is provided. Third‑party inspection (ABS, DNV, BV, SGS) is welcome at every stage.
4. Backed by Sinopec – Financial Strength & Operational Expertise
SJ Petro is a wholly‑owned subsidiary of Sinopec Oilfield Equipment Corporation, part of the Fortune Global 500 Sinopec Group. Sinopec operates thousands of wells annually, including the deepest and heaviest wells in China. Your heavy duty rig is engineered using data from those real‑world campaigns.
5. Global Service & Spare Parts for Heavy Duty Rigs
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24/7 remote diagnostics – our engineers can log into the control system (with your permission) to troubleshoot.
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Regional parts hubs – Dubai, Houston, Singapore stock heavy‑rig specific components (drawworks bearings, top drive spares, pump fluid ends).
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On‑site commissioning and training – included with every rig.
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Field service – emergency response and major overhauls available globally.
6. Flexible Commercial Models – Purchase, Lease, or Finance
| Option | Term | Notes |
|---|---|---|
| Outright purchase | N/A | Standard 30/40/30 payment terms |
| Operating lease | 12‑60 months | Maintenance included, ideal for multi‑year campaigns |
| Short‑term rental | 3‑12 months | For single ultra‑deep wells or exploration |
| Fleet financing | Custom | For 5+ rigs, tailored payment schedules |
7. Designed for Upgradeability – Invest Once, Expand Later
Heavy duty rigs are long‑term assets. Our modular design allows field upgrades:
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From 7,000 m to 9,000 m by replacing drawworks and adding mud pumps.
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From 9,000 m to 12,000 m by upgrading to 6,000 HP drawworks.
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Add walking system, MPD, or automation without structural modification.
FAQ – Heavy Duty Oil Drilling Rigs
Q1: What is the difference between a "heavy duty” drilling rig and a standard rig?
A: A heavy duty drilling rig is defined by its extreme hook load (≥ 4,500 kN / 1 million lb), ultra‑deep depth rating (≥ 7,000 m), and massively reinforced structure (mast, substructure, drawworks, rotary system). Standard rigs typically have hook loads ≤ 3,150 kN and depth ratings ≤ 5,000 m. Heavy duty rigs also feature larger mud pumps, higher pressure ratings, and stronger top drives.
Q2: How deep can your ZJ120‑HD actually drill?
A: The ZJ120‑HD is rated for 12,000 meters using 5″ drill pipe. This rating is based on theoretical maximum drill string weight and has been validated by actual field use – the rig successfully drilled the 10,910‑m well in the Tarim Basin, proving its capability at extreme depths. Actual achievable depth depends on casing program, mud weight, well profile, and formation hardness.
Q3: What is the maximum hook load of the ZJ120‑HD, and why does it matter?
A: 9,000 kN (900 metric tons / 2,000,000 lb). This matters because the drill string alone in a 12,000‑m well can weigh over 800 tons. The hook must be capable of lifting the string, overcoming friction, and providing a safety margin for stuck pipe and fishing operations. The 9,000 kN rating provides that margin.
Q4: Can a heavy duty rig be used for cluster pad drilling (walking between wells)?
A: Yes, for ZJ70‑HD and ZJ90‑HD models, we offer an optional hydraulic walking system that moves the entire assembled rig between wellheads. The walking system is designed for the heavier weight of heavy duty rigs (larger lift cylinders, higher capacity pumps). Inter‑well move time is typically 48‑72 hours. ZJ120‑HD is not normally equipped with walking due to its extreme weight, but skidding (sliding) between slots on a prepared pad is possible.
Q5: What are the power requirements for a ZJ120‑HD heavy duty rig?
A: The ZJ120‑HD requires 5 × 1,900 kVA diesel generator sets in diesel‑electric configuration. Total installed power is approximately 6.5 MW. For grid‑connected operations, a dedicated 6‑8 MW substation is required. The rig's AC VFD system is designed for 690V / 3‑phase / 50‑60 Hz.
Q6: How long does it take to move a heavy duty rig between fields?
A: For a ZJ70‑HD: disassembly, transport, and reassembly typically takes 2‑3 weeks. For ZJ90‑HD: 3‑4 weeks. For ZJ120‑HD: 4‑6 weeks. This is comparable to or faster than other heavy rigs of equivalent capacity because of our modular pin‑connected design. Preparation of the new wellsite (foundations, roads) often dominates the schedule.
Q7: What is the typical cost of a heavy duty oil drilling rig?
A: Heavy duty rigs are high‑capital assets. Indicative budget ranges (FOB China, standard configuration):
| Model | Price Range (USD) |
|---|---|
| ZJ70‑HD | $8M – $12M |
| ZJ90‑HD | $12M – $18M |
| ZJ120‑HD | $18M – $25M |
These ranges exclude optional features (walking system, high‑pressure mud, automation, climate packages). Contact us for a firm quote based on your specific requirements.
Q8: Do you provide training for heavy duty rig operation?
A: Yes. Every heavy duty rig purchase includes 4‑6 weeks of on‑site training covering:
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Rig assembly and disassembly (heavy module handling)
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Heavy duty drawworks and brake system operation
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High‑pressure mud pump maintenance
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Emergency procedures for stuck pipe and fishing
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Automation system and remote monitoring
We also provide full simulator‑based training for driller certification on heavy rigs.
Q9: What is the warranty period for heavy duty rigs?
A: 18 months from shipment or 12 months from commissioning (whichever first). Extended warranty available for critical components (drawworks, top drive, mud pumps) for an additional 5‑10% of equipment cost.
Q10: How do I get a firm quote for a heavy duty drilling rig?
A: Contact our heavy rig sales team with:
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Target depth and well profile
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Expected hook load requirements (including casing and fishing loads)
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Operating environment (desert, arctic, offshore)
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Desired model (ZJ70‑HD, ZJ90‑HD, ZJ120‑HD)
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Any special requirements (walking system, high‑pressure mud, automation level)
We will provide a custom heavy rig proposal including engineering analysis, configuration drawings, budget price, and delivery schedule – within 14 working days.
