Preventive maintenance and inspections are fundamental to safe and efficient operations in the oil and gas sector. Given the hazardous nature of the industry, even minor structural issues can escalate into serious incidents such as leaks, spills, or explosions, putting both personnel and the surrounding environment at risk. Traditionally, inspecting storage tanks and similar assets required manual entry, scaffolding, or complete system shutdowns. While effective to a degree, these approaches are often time-consuming and inherently risky.
In recent years, drone technology has reshaped how inspections are conducted across the industry. Designed to operate in harsh and complex environments, drones provide a safer and more cost-effective alternative to conventional methods. Whether deployed externally or internally, these unmanned systems enable operators to gather high-quality data without exposing workers to unnecessary danger.
What is a drone-based tank inspection?
A drone-based tank inspection refers to the use of unmanned aerial systems to assess the structural condition of storage tanks and related infrastructure. These drones are equipped with advanced tools such as high-resolution drone cameras, thermal imaging sensors, and real-time data transmission systems, allowing inspectors to capture detailed visuals and measurements remotely.
In many cases, a confined space drone is deployed to navigate enclosed environments such as storage tanks, where human access would otherwise require strict safety protocols. These drones can manoeuvre through tight spaces, illuminate dark interiors, and transmit live footage to operators stationed safely outside.
Conventional inspection methods often involve draining tanks, erecting scaffolding, or requiring personnel to enter hazardous confined spaces. These processes not only increase operational risk but also lead to prolonged downtime. As infrastructure continues to age and regulatory standards become more stringent, organisations are turning to drone-based solutions that minimise disruption while maintaining inspection accuracy.
Today, drones are widely used across a variety of oil and gas assets, including offshore platforms, refineries, storage tanks, chimneys, and floating production systems. Their versatility and efficiency have made them an increasingly valuable tool in modern inspection programmes.
Advantages of conducting tank inspections via drones
1. Improved safety
Safety is arguably the most significant advantage of drone tank inspections. Drones remove the need for personnel to enter confined spaces or work at height, which drastically reduces personnel exposure to common hazards such as toxic gases, oxygen deficiency, and structural instability.
Instead of physically entering a tank, inspectors can operate drones remotely and still obtain comprehensive visual data. Many drones are also fitted with gas sensors that can detect hazardous atmospheres in real time, allowing operators to respond proactively to dangerous conditions.
Even in situations where human entry is ultimately required for repairs, drones can first identify and locate defects. This allows maintenance teams to spend less time inside hazardous environments, thereby lowering overall risk exposure.
2. High-quality data collection
Modern inspection drones are capable of capturing exceptionally detailed imagery and data. Equipped with 4K cameras and advanced lighting systems, they can reveal minute defects such as corrosion, cracks, and coating degradation that might otherwise go unnoticed.
In addition, drones fitted with LiDAR technology can generate accurate three-dimensional models of tank interiors. These models allow inspectors to pinpoint areas of concern and map defect locations with precision. By tagging points of interest within a digital model, inspection teams can communicate findings more effectively and streamline decision-making processes. This level of detail not only improves the accuracy of inspections but also enhances reporting quality, making it easier for stakeholders to understand asset conditions.
3. Smarter maintenance planning
Drone inspections contribute significantly to more informed and strategic maintenance planning. The ability to capture and store inspection data over time creates a valuable historical record of asset performance. Through data analysis, facility managers can identify patterns of wear and deterioration, allowing them to predict when maintenance will be required. This supports a shift from reactive maintenance to a more proactive, condition-based approach.
Furthermore, real-time video feeds enable multiple stakeholders to review inspection findings simultaneously. Engineers, safety officers, and decision-makers can collaborate more efficiently, reducing delays and improving overall operational responsiveness.
4. Increased frequency of inspections
Because drones can be deployed quickly and require minimal setup, they make it feasible to conduct inspections more frequently. This is particularly beneficial for assets that are difficult or dangerous to access using traditional methods.
Frequent inspections allow operators to monitor the progression of defects, assess material degradation rates, and verify the effectiveness of previous maintenance work. Early detection of issues reduces the likelihood of unexpected failures, which in turn helps avoid costly emergency repairs and unplanned downtime. Regular monitoring also supports compliance with industry regulations, ensuring that assets remain within acceptable safety standards.
5. Cost savings
Another highly compelling benefit of drone inspections is the potential for substantial cost reduction. Traditional inspection methods often involve significant expenditure on scaffolding, specialised equipment, and labour. Setting up scaffolding alone can take days or even weeks, requiring large teams and extensive planning. In contrast, drones can be deployed with minimal preparation, eliminating the need for such costly infrastructure.
In some documented cases, organisations have achieved cost reductions of up to 90% or more by switching to drone-based inspections. These savings stem not only from reduced labour and equipment costs but also from shorter inspection durations and less operational disruption.
6. Reduced downtime
Downtime is a major concern in the oil and gas industry, where every hour of halted operations can result in substantial financial losses. Traditional inspection methods often require assets to be taken offline for extended periods.
Drone inspections significantly shorten this timeframe. Without the need for scaffolding or extensive safety preparations, inspections can be completed in a matter of hours or days rather than weeks. Less downtime means organisations can maintain productivity while still ensuring that critical inspections are carried out effectively. This balance between safety and operational continuity is a key advantage of adopting drone technology.
Why drone inspections are not always sufficient
Despite their many advantages, drone inspections are not a complete replacement for traditional methods. Certain types of assessments require direct human involvement or specialised tools to meet regulatory and technical requirements. It is also worth noting that a bigger drone doesn’t always mean better inspection. Compact, manoeuvrable models are often better suited for navigating confined spaces like tank interiors, where agility matters more than size or payload capacity.
In addition, regulatory frameworks in the oil and gas industry may require certified inspectors to physically verify findings. Compliance standards often mandate hands-on assessments and documented verification processes that drones alone cannot fulfil.
Environmental factors can also limit drone effectiveness. Conditions such as strong electromagnetic interference or highly reflective surfaces may affect sensor accuracy and flight stability. As a result, drone inspections should be viewed as a complementary tool rather than a standalone solution.
Combining drones with traditional inspection methods
While drone technology has transformed how tank inspections are conducted, it is most effective when used alongside traditional inspection, not in place of. A hybrid approach allows operators to leverage the strengths of each method while mitigating their individual limitations.
Drones excel in rapid visual assessments, especially in confined or hazardous environments where human entry would require extensive safety measures. They can quickly identify visible defects such as corrosion, coating degradation, sediment buildup, or structural anomalies. This makes them ideal for preliminary inspections or routine monitoring.
However, certain critical assessments still require direct contact methods. Techniques such as ultrasonic testing (UT), magnetic flux leakage (MFL), and thickness gauging are essential for detecting subsurface defects, measuring material loss, and validating structural integrity, which are capabilities that drones alone cannot fully replicate.
A combined inspection strategy typically works as follows:
- Initial drone survey – Drones are deployed to scan the tank interior or exterior, capturing high-resolution imagery and identifying areas of concern.
- Targeted manual inspection – Based on drone findings, inspectors focus only on specific high-risk zones rather than conducting a full manual inspection, reducing exposure time and effort.
- Data validation and cross-referencing – Drone-collected data is used alongside readings from traditional tools to ensure accuracy and completeness.
- Reduced scaffolding and confined space entry – By narrowing down inspection zones, the need for extensive setup and human entry is significantly minimised.
This integrated approach not only improves inspection efficiency but also enhances safety and data reliability. Ultimately, drones act as a force multiplier that can streamline workflows while ensuring that critical integrity checks are still carried out using proven methods.
Conclusion
Drone technology has fundamentally transformed how tank inspections are conducted in the oil and gas sector. Drone inspections have proven to be a compelling alternative to traditional inspection methods by improving safety, enhancing data quality, and reducing both costs and downtime. However, their true value lies in how they complement existing practices. When combined with conventional inspection techniques, drones enable a more efficient, accurate, and risk-conscious approach to asset management.
As the industry continues to embrace digital transformation, organisations that adopt drone-based inspection strategies will be better positioned to maintain operational integrity while meeting evolving safety and regulatory demands.
Ready to expand your skill set with in-demand drone capabilities? At The Academy of Design Arts and Media (A.D.A.M.), our drone courses are tailored for individuals looking to apply drone technology in industries such as construction, energy, and infrastructure. Learn how to conduct aerial inspections, capture accurate mapping data, and operate drones safely in professional environments, all under expert guidance. Whether you’re upskilling for your current role or exploring new career pathways, join our drone course for practical knowledge and confidence to succeed in today’s evolving drone landscape.
