Henan Vance Petroleum Machinery Co., Ltd.

Oilfield Transmission Box Heavy-Duty Gearboxes for Drilling & Workover Rigs

Industrial-grade oilfield transmission boxes engineered for maximum torque transfer, extreme-duty reliability, and seamless power distribution across drilling rigs, workover units, and petroleum machinery worldwide.

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20+
Years Experience
50+
Countries Served
500+
Units Delivered
100%
Custom Options
Explore
About the Product

What Is an Oilfield Transmission Box?

An oilfield transmission box — also known as an oilfield gearbox or drilling rig transmission unit — is a critical mechanical power transmission component used in the petroleum extraction and drilling industry. It transfers, multiplies, and regulates torque and rotational speed between prime movers (diesel engines or electric motors) and driven equipment on drilling rigs and workover rigs.

At Henan Vance Petroleum Machinery Co., Ltd., we manufacture heavy-duty oilfield transmission boxes built to withstand the harshest downhole and surface operating conditions — from desert heat to arctic cold, from shallow wells to ultra-deep drilling applications.

Our transmission boxes are engineered with precision-ground helical and spiral bevel gears, high-strength forged steel housings, multi-speed shifting mechanisms, and advanced sealing systems to deliver zero-compromise performance in the most demanding oilfield environments on earth.

🔩 Drilling Rigs ⚙️ Workover Rigs 🛢️ Petroleum Equipment 🏭 Custom Configs 🌍 Global Shipping 📐 API Standard
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Oilfield Transmission Box - Front View | Vance Petro Heavy Duty Gearbox
Featured Product
Heavy-Duty Oilfield Transmission Box
Multi-speed | High Torque | Custom Configurations

Primary Application Areas

🏗️
Land Drilling Rigs
Onshore drilling operations requiring high torque transmission
🔧
Workover Rigs
Well intervention and workover operations of all scales
⚓
Offshore Platforms
Marine-grade sealed units for offshore drilling environments
🛢️
Production Equipment
Pump jacks, mud pumps, and oilfield production machinery
Why Our Gearboxes Outperform

Key Engineering Features

Every oilfield transmission box we manufacture is engineered from the ground up for brutal reliability, peak power efficiency, and a long service life in petroleum drilling applications.

High-Strength Forged Housing

Precision-machined, heavy-wall forged steel and cast iron housings provide maximum rigidity and impact resistance. Engineered to withstand shock loads and torsional vibrations common in oilfield drilling operations without deformation or fatigue cracking.

API & ISO Compliant Materials

Multi-Speed Gear Ratios

Multi-speed configurations (typically 4-speed or 5-speed) allow operators to optimize torque and RPM output for different drilling conditions — from slow, high-torque formation drilling to high-speed tripping operations. Smooth, synchronized shifting under load.

Synchronized Under-Load Shifting

Maximum Torque Transmission

Precision-ground helical gears and spiral bevel gears ensure efficient torque transmission with minimal power loss. Our heavy-duty transmission boxes handle input torques exceeding 50,000 N·m, making them suitable for the most demanding rotary drilling applications.

Up to 50,000+ N·m Torque Capacity

Advanced Sealing System

Multi-stage oil sealing systems with premium-grade lip seals, labyrinth seals, and breathers prevent contamination ingress and oil leakage even under extreme pressure differentials and temperature cycling. Rated for continuous operation in dusty, muddy, and chemically aggressive oilfield environments.

IP65+ Ingress Protection

Forced Lubrication System

Integrated pressure-fed lubrication system with oil pump, filter, cooler, and level sight glass ensures all critical gear mesh points, bearings, and sliding surfaces receive continuous, filtered oil supply. Temperature-controlled oil circulation extends component life and prevents thermal breakdown.

Pressure-Fed Splash Lubrication

Full Custom Engineering

Every oilfield gearbox can be fully customized to your rig's specific requirements: input/output shaft configurations, mounting bolt patterns, gear ratios, PTO provisions, clutch integration, painting specification, and documentation package. Direct engineering support from our technical team.

OEM & Replacement Units Available

Need a Custom Oilfield Transmission Box?

Share your rig specs and we'll engineer the perfect heavy-duty gearbox solution.

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Engineering Data

Technical Specifications

Standard technical parameters for our heavy-duty oilfield transmission boxes. All specifications can be customized to match your exact drilling rig requirements.

Standard Product Specifications

Oilfield Transmission Box / Heavy-Duty Gearbox

Parameter Specification
Product Type Oilfield Transmission Box / Heavy-Duty Gearbox
Application Drilling Rigs, Workover Rigs, Petroleum Machinery
Input Power Range 100 kW – 2,000 kW (Custom)
Max Input Torque Up to 50,000 N·m (Custom Higher)
Input Speed Range 600 – 2,200 RPM
Number of Speeds 4-Speed / 5-Speed (Standard) | Custom
Gear Type Helical / Spiral Bevel / Spur Gears
Gear Material 20CrMnTi / 17CrNiMo6 Alloy Steel
Housing Material High-Grade Cast Iron / Forged Steel
Lubrication System Forced Pressure + Splash Lubrication
Sealing Standard Multi-stage Lip Seal + Labyrinth Seal
Operating Temperature -40°C to +80°C (-40°F to +176°F)
Gear Accuracy Grade Grade 6-7 (ISO 1328)
Surface Treatment Carburizing / Nitriding / Shot Peening
Transmission Efficiency ≥ 96% per Stage
Mounting Configuration Foot / Flange / Custom Base Frame
Noise Level ≤ 85 dB(A) at Rated Speed
Quality Certifications ISO 9001:2015 | API Compliance
Paint Finish Industrial Epoxy Primer + Topcoat
Warranty 12 Months from Commissioning

⚡ Performance Highlights

Torque Capacity 98%
Transmission Efficiency 96%+
Seal Reliability 99%
Gear Accuracy Grade 95%
Service Life Rating 97%

📊 Quick Reference Stats

50K+
Max N·m Torque
2000+
Max Input RPM
5-SPD
Speed Options
96%
Efficiency Rate
-40°C
Min Temp Rating
12M
Warranty Period

📄 Documentation Available

  • General Assembly Drawing (GA)
  • 3D CAD Model (STEP/IGES)
  • Material Test Certificates (MTC)
  • Factory Acceptance Test (FAT) Report
  • Operation & Maintenance Manual
  • Spare Parts List (BOM)
  • ISO 9001 Quality Certificate
Request Full Datasheet
Why Choose Vance Petro

Your Trusted Oilfield Gearbox
Manufacturing Partner

Vance Petro specializes in the design, engineering, and manufacture of heavy-duty petroleum drilling equipment including transmission boxes, drawworks components, and custom gearbox assemblies for the global oil and gas industry. With deep manufacturing expertise and a customer-first approach, we deliver reliable solutions that keep your rig running.

Petroleum Industry Specialization

We focus exclusively on oilfield and petroleum drilling equipment — our entire design, manufacturing, and quality process is optimized for the unique demands of the oil and gas sector.

ISO 9001 Quality Management

Full ISO 9001:2015 certified manufacturing process with documented quality control at every production stage — from raw material incoming inspection through final FAT testing and shipment.

End-to-End Custom Engineering

From initial design consultation and FEA analysis through manufacturing, testing, painting, and documentation — we handle every aspect of your custom gearbox project in-house.

Global Export Capability

We export heavy-duty oilfield gearboxes and transmission systems worldwide. Experienced in export packing, documentation (CO, Form A, fumigation certificates), and multi-modal logistics to any port of destination.

15+
Years Experience
In petroleum drilling equipment manufacturing
500+
Units Delivered
Oilfield gearboxes shipped globally
30+
Countries Served
Active clients in major oil producing regions
98%
Client Satisfaction
Based on post-delivery client feedback surveys

Certifications & Standards Compliance

ISO 9001
2015 Certified
API Standard
Compliant Design
CE Marking
EU Export Ready
SGS Inspected
Third Party Verified

Ready to Start Your Project?

Send us your technical requirements and receive a detailed quotation within 24 hours.

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Frequently Asked Questions

Common Questions About Our Oilfield Gearboxes

Everything you need to know before purchasing or inquiring about our petroleum drilling transmission boxes and heavy-duty gearbox solutions.

Vance Petro manufactures a full range of heavy-duty petroleum drilling transmission equipment including: drawworks transmission boxes, multi-speed drilling gearboxes (3-speed, 4-speed, 5-speed), compound gearboxes, auxiliary brake gearboxes, and custom-engineered transmission assemblies designed to meet specific rig specifications. All units are designed for high-torque, high-load oilfield environments.

Yes. We accept customer-supplied technical drawings, 3D CAD models (STEP, IGES, DWG), or engineering specifications and manufacture to exact requirements. Our engineering team reviews all submitted drawings for manufacturability and will provide feedback or suggestions to optimize cost and performance. We also offer reverse engineering services for obsolete or OEM replacement gearboxes.

Lead time varies depending on complexity, quantity, and current production schedule. As a general guideline: standard catalog models typically ship within 8–12 weeks. Custom-engineered units require 12–20 weeks from drawing approval. We provide a confirmed production schedule with every purchase order. Rush production may be available — contact our sales team to discuss your timeline.

Every gearbox leaves our facility with a comprehensive quality documentation package including:

  • • ISO 9001:2015 quality management compliance documentation
  • • Material Test Certificates (MTC) for all main structural components
  • • Dimensional inspection report with as-built measurements
  • • Factory Acceptance Test (FAT) run report with load and noise data
  • • Gear tooth contact pattern and backlash inspection records
  • • Third-party inspection available (SGS, BV, TÜV upon request)

Yes. We maintain a comprehensive spare parts inventory for all gearbox models we manufacture, including gears, shafts, bearings, seals, clutch components, and housings. Each delivery includes a recommended spare parts list (BOM). Our after-sales team provides remote technical support, troubleshooting guidance, and on-site service coordination. We also offer long-term spare parts supply agreements for operators with large fleet deployments.

Our standard payment terms are T/T 30% deposit upon order confirmation, 70% balance before shipment. L/C at sight is accepted for orders above a minimum value threshold. There is no formal MOQ — we accept single-unit orders for custom gearboxes. Volume pricing is available for multiple-unit orders. Please contact our sales team for a formal quotation tailored to your specific requirements.

🤔

Still Have Questions?

Our technical sales team is ready to answer any questions about our oilfield transmission boxes, custom gearbox capabilities, or your specific project requirements.

Contact Our Team info@vancepetro.com
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Request a Free Quote

Fill out the form below with your technical requirements for our oilfield transmission box or heavy-duty gearbox needs. Our engineering team will respond within 24 hours with a detailed quotation.

Contact Information

Phone / WhatsApp
+86 189 3767 6920
Factory Address

200m East to South at the intersection of 106 National Road and Jintian Road, Mengke Township, Hualong District,
Puyang City, Henan Province,
China

Business Hours

Monday – Friday 08:00 – 18:00 CST
Saturday 09:00 – 14:00 CST
Sunday Closed
Email monitored 24/7 for urgent inquiries

Our Response Promise

We guarantee a detailed technical response within 24 hours for all inquiry submissions including product specifications, preliminary pricing, and availability confirmation.

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Buyer knowledge center

Oilfield Transmission Box Technical Guides

Research specifications, price factors, supplier qualification, applications and maintenance before preparing your RFQ.

GUIDE 01Oilfield Transmission Box Specifications and Sizing GuideGUIDE 02Oilfield Transmission Box Price and Total Cost GuideGUIDE 03How to Choose an Oilfield Transmission Box ManufacturerGUIDE 04Oilfield Transmission Box Applications and How It WorksGUIDE 05Oilfield Transmission Box Maintenance and Troubleshooting Guide
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Henan Vance Petroleum
Machinery Co., Ltd.

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