Oil drilling rig manufacturers

Technical Specifications: Key Models at a Glance

The following table presents the full range of SJ drilling rigs available for global customers, from truck-mounted units to modular deep-drilling systems. All specifications are based on published SJ technical data. Custom configurations are available upon request.

Model Series	Configuration	Drilling Depth (4½″ DP)	Max Hook Load	Drawworks Power	Mast Height	Primary Application
ZJ10 / 1125CZ	Truck-mounted	1,000 m	1,125 kN	450 hp	29 m	Shallow well drilling
ZJ15 / 1350CZ	Truck-mounted	1,500 m	1,350 kN	550 hp	33 m	Development drilling
ZJ20 / 1580CZ	Truck-mounted	2,000 m	1,580 kN	650 hp	35 m	Medium-depth drilling
ZJ30 / 1800CZ	Truck-mounted	3,000 m	1,800 kN	800 hp	36 m	Deeper exploration
ZJ40 / 2250CZ	Truck-mounted / Modular	4,000 m	2,250 kN	1,000 hp	38 m	Deep drilling
ZJ50 / 3150D (BigEasy BE770)	Trailer-mounted (crane-free)	5,000 m	3,150 kN (770,000 lb)	1,470 hp	45.5 m	Ultra-fast mobilization
ZJ40 / 2250D (BigEasy BE550)	Trailer-mounted (crane-free)	4,000 m	2,250 kN (550,000 lb)	1,100 hp	43 m	Fast mobilization
ZJ70 / 4500D	Modular	7,000 m	4,500 kN	2,000 hp	47 m	Deep exploration
ZJ90	Modular	9,000 m	5,850 kN	3,000 hp	49 m	Ultra-deep exploration

Key Technologies & Engineering Capabilities

1 Full API Compliance – The Industry Gold Standard

When you're buying from an oil drilling rig manufacturer, certifications are not optional. SJ holds API monogram licenses for Spec 4F (drilling and well servicing structures), 7K (drilling equipment), and 8C (derricks), plus API Q1, ISO 9001, and HSE management system certification. Our manufacturing facilities are also certified to ISO 9001 and HSE standards, with national laboratory accreditation for testing and quality control.

Why does this matter to you? Because API compliance means every component—from the derrick and substructure to the drawworks and mud systems—is designed, manufactured, and tested to a globally recognized standard. It means you're not taking a gamble on quality. It means your rig will pass inspection when it arrives at customs, and it means your insurance underwriters and regulatory authorities will accept the equipment without endless back-and-forth.

2 Caterpillar + Allison Powertrain – Globally Serviceable Components

We don't use obscure, proprietary components that leave you stranded when something breaks. SJ drilling rigs are powered by Caterpillar diesel engines (C9 through C18 and larger) paired with Allison Oil Field Series transmissions (4700 OFS, S5610HR, S6610HR, M6620AR, depending on the model). These are components with global service networks. When your rig is operating in the middle of nowhere, you need to be able to get parts and service. Caterpillar and Allison have dealer networks in virtually every country where oil is produced. That's not an accident—it's a deliberate engineering choice.

3 AC VFD Electric Drive Systems

For customers who prefer electric drive over mechanical, SJ offers AC VFD (Variable Frequency Drive) systems across most of our rig lineup. The BigEasy series, for example, is built around AC VFD technology, providing stepless speed control, smoother torque delivery, regenerative braking, and integration with automated drilling controls. Electric drive configurations are also available for modular and conventional rigs upon request.

4 Hydraulic Mast Erection – No Crane Required

Our mast raising systems are designed to eliminate the need for auxiliary cranes on location. Whether it's the front-opening two-section telescoping mast on our truck-mounted rigs or the fully trailer-mounted design of the BigEasy series, every rig SJ builds can be erected using integrated hydraulic cylinders. This saves you crane rental costs, reduces the number of personnel required on site, and cuts rig-up time dramatically.

5 Extreme Climate Engineering

SJ has delivered rigs to some of the most challenging environments on earth:

• Arctic/Cold-Weather Package: Designed for operation down to -45°C and storage down to -60°C, with low-temperature lubricants, heated enclosures, and specially treated materials. Field-proven on ZJ40 rigs delivered to Orenburg, Russia.

• Desert/Hot-Climate Package: Enhanced cooling systems, sand and dust filtration, and reinforced sealing for operation in +50°C ambient temperatures with high particulate loads. Deployed successfully in Kuwait and across the Middle East.

6 Advanced Manufacturing & Quality Control

SJ's manufacturing capabilities are extensive. We operate seven dedicated production lines covering drawworks, gear boxes, cylinders, masts, high-pressure manifolds, plunger pumps, and post-treatment processes. Three assembly lines handle drilling rigs, workover rigs, and cementing and fracturing equipment. Our rig assembly yard spans 50,000 square meters with 24 rigging-up positions and two offshore rig commissioning sites capable of testing up to 750 tons. This isn't theoretical capacity—it's what we actually operate every day.

Applications: Where Our Rigs Are Working Right Now

SJ drilling rigs have been deployed across a wide range of operating environments and project types worldwide.

1 Onshore Oil & Gas Drilling

• Conventional exploration and development drilling – Our ZJ series truck-mounted rigs are workhorses for infill drilling and development programs across mature fields.

• Remote and infrastructure-limited locations – When the road ends, our self-propelled and heli-portable rigs keep going.

• Pad drilling and cluster wells – Fast mobilization between closely spaced wellheads reduces non-productive time and lowers per-well costs.

2 Workover & Well Service

Our dual-purpose XJ series rigs handle everything from routine tubing pulls and pump repairs to complex fishing jobs, milling, sidetracking, and plug-and-abandonment operations.

3 Shallow & Medium- Depth Water Well Drilling

For rural water supply projects, agricultural irrigation, and municipal water systems, our lighter ZJ10 and ZJ15 truck-mounted rigs are cost-effective solutions that mobilize quickly and operate efficiently.

4 Geothermal Exploration & Development

With depth capabilities up to 9,000 meters and reliable mud circulation systems, SJ rigs are well-suited for geothermal gradient drilling and production well installation.

5 Extreme Climate Operations

• Arctic: Cold-weather ZJ40 rigs operating through Siberian winters at -45°C.

• Desert: ZJ70D rigs operating in Kuwait and throughout the Middle East at +50°C.

• High-altitude: Rigs engineered for reduced oxygen environments.

6 Offshore Platform Drilling

SJ supplies modular drilling equipment for fixed platforms and jack-up units, backed by our decades of experience in offshore drilling and production equipment.

Why Choose SJ Petroleum Machinery as Your Oil Drilling Rig Manufacturer?

If you're reading this, you've probably already looked at multiple suppliers. You've seen the brochures, the generic "we're the best" claims, and the pricing that seems too good to be true from manufacturers you've never heard of. Here's why SJ Petroleum Machinery is different.

✅ Backed by Sinopec Group – Stability You Can Count On

SJ is a wholly-owned subsidiary of Sinopec Oilfield Equipment Corporation, which itself is part of Sinopec Group—a Fortune Global 500 company and one of the world's largest integrated energy enterprises. That means we have the financial stability, technical resources, and supply chain depth that smaller or independent manufacturers simply can't match. When you buy from SJ, you're buying from a company that will be here tomorrow, next year, and decades from now.

✅ Eight Decades of Manufacturing Heritage – Not a Startup

SJ was founded in 1941 in Lanzhou—over 80 years ago. We relocated to Jingzhou in 1969 to support the Jianghan Oilfield Battle, becoming the Fourth Machinery Factory. We switched to petroleum equipment production in 1980 after bringing in seven key manufacturing technologies from the United States. We built China's first domestic workover rigs, the first automatic slurry cement trucks, and the first high-power fracturing units. This isn't a story about a company that just entered the market. This is a company that has been building heavy-duty oilfield equipment continuously since before most of our competitors' founders were born.

✅ State-Recognized Technology Center with Over 200 National Patents

SJ has been recognized as a "National Enterprise Technology Center," a "National Manufacturing Single Championship Demonstration Enterprise," and has won second prize in the National Science and Technology Progress Award. Our technical center employs dedicated R&D personnel—not engineers who learned drilling equipment on the job last week, but professionals who have spent their entire careers in this industry. We've obtained more than 200 national patents and continue to invest heavily in next-generation drilling technologies.

✅ True End-to-End Manufacturing – Not Just Assembly

Many manufacturers claim to "make" drilling rigs when what they actually do is buy components from other suppliers and bolt them together. SJ owns its entire manufacturing chain—from drawworks and gear boxes to masts, cylinders, high-pressure manifolds, and pumps. We have seven dedicated production lines and three assembly lines in-house. That means we control quality at every stage, we're not at the mercy of third-party suppliers, and we can customize components to your exact requirements without waiting for someone else's production schedule.

✅ Globally Recognized Certifications

SJ holds API monogram licenses for Spec 4F, 7K, and 8C, plus API Q1, ISO 9001, HSE, and national laboratory accreditation. Our drilling rigs have earned "China Top Brand" recognition—a government-backed quality designation. We've also obtained CE, CU-TR (Russia/EAEU Customs Union), and ABS certifications for specific product categories. Whatever certification your jurisdiction requires, we've either already got it or we can get it.

✅ Proven Export Track Record Across Six Continents

SJ has delivered drilling and workover equipment to the United States, Canada, Russia (including cold-weather ZJ40s for Orenburg), Kuwait, countries across the Middle East, West Africa, Southeast Asia, and throughout the Asia-Pacific region. We're not new to international shipping, export documentation, customs clearance, or compliance with local import regulations. We know how to get a rig from our factory floor in Jingzhou to your wellsite, anywhere in the world.

✅ True Customization – Not One-Size-Fits-All

We don't force you to choose from three pre-set "packages" that almost fit your needs. SJ engineers will work with you to design the exact rig configuration your operation requires. Need a specific engine-transmission combination? Done. Running in an arctic environment that requires special materials and heating? We've built those. Need a custom axle configuration to meet local road transport laws? We'll engineer it. Want a top drive system integrated into a truck-mounted chassis? We've done that too.

✅ Competitive Pricing Without Cutting Corners

Let's be honest: We're not the cheapest manufacturer on the market. The cheapest rigs break down, and a broken rig doesn't drill. But because we're part of Sinopec with an integrated, in-house supply chain, we don't pay middleman markups on components, assembly, or shipping. You pay for a high-quality, API-certified drilling rig. You don't pay for a chain of intermediaries. The result is a rig that competes on quality with Western manufacturers at a price point that makes economic sense for your project.

✅ One-Stop Integrated Solutions

SJ doesn't just sell you a drilling rig and walk away. We provide end-to-end solutions including feasibility studies, engineering design, manufacturing, factory acceptance testing (witnessed at our Jingzhou facility), export packaging, shipping coordination, on-site commissioning, operator training, and ongoing after-sales support. Need spare parts? We maintain global inventory and work with regional partners for rapid fulfillment. Having a technical issue? Our support team is available for remote troubleshooting and field assistance.

✅ 100 Drilling Rigs per Year Production Capacity

We currently produce approximately 100 drilling rigs, 100 workover rigs, 120 cementing units, 80 fracturing units, and over 700 pumps annually across our manufacturing facilities. That's not aspirational capacity—that's what we actually ship. So when you place an order, you're not waiting for us to figure out how to build your rig. You're simply moving into the next available slot in an already-running production line.

Frequently Asked Questions (FAQ)

Q1: What's the typical lead time for a drilling rig from SJ Petroleum?

Lead times vary by model and customization level. Standard ZJ series truck-mounted rigs (ZJ30, ZJ40) typically require 8 to 12 months from order confirmation to delivery. More complex configurations—deep modular rigs like ZJ70 or ZJ90, or fully customized units—may require 12 to 16 months. We recommend contacting our sales team with your specific timeline requirements. Expedited delivery options may be available for certain configurations.

Q2: What certifications do your drilling rigs carry?

SJ holds API Spec 4F (drilling and well servicing structures), API 7K (drilling equipment), API 8C (derricks), API Q1 (quality management), ISO 9001, and HSE management system certifications. We've also obtained CE, CU-TR (Russia/EAEU Customs Union), and ABS certifications for specific product categories. Our facilities operate under national laboratory accreditation for testing and quality control.

Q3: What's included in the standard purchase package?

A standard SJ drilling rig includes the complete rig package (carrier chassis for truck-mounted units or module set for modular/trailer-mounted units, mast, drawworks, power system, transmission, driller's cabin, and all integrated hydraulics), API certification documentation, factory acceptance testing (witnessed), and export packaging. Additional services—on-site commissioning, operator and maintenance training, spare parts kits, extended warranties, and global field service support—are available as separate line items.

Q4: Can SJ provide references from customers in my region?

Yes. SJ can provide references from customers in Russia (Orenburg region cold-weather ZJ40 rigs), Kuwait (ZJ70D desert rigs), and across multiple other international operating regions, subject to customer privacy agreements. We recommend discussing your specific operating region with our sales team so we can direct you to the most relevant reference customers.

Q5: How are the rigs shipped internationally?

SJ has extensive experience in international shipping. Rigs are broken down into transport modules, packaged according to your destination's customs and shipping requirements, and transported either by container vessel or roll-on/roll-off (Ro-Ro) shipping. We coordinate all export documentation, customs declarations, and port logistics. For some projects, we can also manage delivery under DDP (Delivered Duty Paid) terms, handling all customs clearance and import charges on your behalf—similar to our ZJ40 deliveries to Russia.

Q6: Do you offer after-sales support and spare parts globally?

Yes. Every rig purchase includes comprehensive technical documentation (operation manuals, parts lists, maintenance schedules, electrical and hydraulic schematics). Our after-sales team provides remote technical support via email, phone, and video. On-site commissioning and training services are available upon request. Spare parts are stocked at strategic global locations, with additional inventory maintained at our Jingzhou facility for rapid air or sea shipment.

Q7: Can you customize a rig for extreme cold or desert conditions?

Absolutely. SJ has built and delivered rigs for both environments:

• Cold-weather package: Operation down to -45°C, storage down to -60°C, with low-temperature lubricants, heated enclosures, specialized materials, and freeze-protected hydraulics. Field-proven on ZJ40 rigs operating in Orenburg, Russia.

• Desert package: Enhanced cooling systems, sand and dust filtration, reinforced sealing, wide-track tires or desert tire configurations, and high-temperature lubricants. Deployed successfully in Kuwait and across the Middle East.

Q8: What's the difference between SJ truck-mounted, modular, and BigEasy rigs?

• Truck-mounted (ZJ series): Self-propelled on a custom heavy-duty chassis. Best for operations requiring frequent moves over road networks. Mast is hydraulically erected without external crane.

• Modular (ZJ series modular variants): Skid-mounted modules that require crane assistance for assembly but offer greater depth capacity (up to ZJ90, 9,000 m). Best for exploration campaigns where the rig will stay on location for extended periods.

• BigEasy (BE series): Trailer-mounted crane-free design jointly developed with LOADMASTER. Transports in just six trailer loads and assembles without any external lifting equipment. Best for pad drilling programs requiring ultra-fast mobilization between closely spaced wells.

Q9: Can I visit your factory in Jingzhou before placing an order?

Yes. SJ welcomes qualified customers to visit our manufacturing facility in Jingzhou, Hubei Province. On-site visits can include tours of our production lines, assembly yard, and testing facilities, as well as witnessing factory acceptance testing of your rig prior to shipment. Please contact our sales team to schedule a visit.

Q10: What payment terms do you offer?

Standard payment terms typically include a combination of advance payment, milestone payments (upon completion of major manufacturing stages such as steel fabrication, assembly, and testing), and final payment upon factory acceptance testing and shipping. Specific payment methods include wire transfers (T/T), letters of credit (L/C) confirmed by major international banks, and other mutually agreed structures. All financial arrangements are subject to negotiation and compliance with applicable international trade regulations.

Q11: How does SJ compare to other major drilling rig manufacturers like BOMCO, RG Petro, or international brands like NOV?

Here's an honest assessment:

SJ is not the largest Chinese manufacturer (BOMCO holds that distinction), but we have three specific advantages that matter to many buyers. First, our specialization in mobile rigs—truck-mounted, trailer-mounted, and modular designs—means we've refined these specific products over decades. Second, as a Sinopec subsidiary, we offer the financial stability, compliance assurance, and supply chain depth that independent manufacturers cannot match. Third, our pricing is generally more competitive than Western manufacturers (NOV, etc.) while our quality meets the same API certification standards—because we build with the same Caterpillar/Allison components they do.

If you need the absolute lowest price and are willing to accept higher risk, there are cheaper options. If you need a rig that works, has proper API certifications, will be supported after the sale, and comes from a company with a real track record and the financial backing of Sinopec, SJ is the right choice.

Q12: What's your production capacity? Can you handle a large fleet order?

Yes. SJ's current annual production capacity is approximately 100 drilling rigs, 100 workover rigs, 120 cementing units, 80 fracturing units, and over 700 pumps. Our assembly yard has 24 rigging-up positions and can handle simultaneous production of multiple rigs. For large fleet orders (e.g., 5–10 rigs for a major operator), we can allocate dedicated production lines and manage phased delivery schedules. Please contact our sales team to discuss your specific volume and timeline requirements.