Learn how to identify and assess the risks of drilling operations so you can put a safety management system in place to help reduce these risks.
Published 29 Mar 2023
Drilling safety is a broad term that encompasses a variety of best practices and procedures designed to keep workers safe while operating drilling equipment. Among the many aspects of drilling safety, some of the most important is maintaining adequate training in the use of drilling equipment for all workers, following all safety protocols while operating the equipment, and regularly inspecting it to ensure that it is in good working condition.
Taking these steps will help companies prevent accidents and injuries at work. Drilling safety is crucial to any successful drilling operation, and following best practices and procedures can keep workers safe from harm.
There are several risks associated with oil and gas drilling operations. Most of these risks involve working with heavy machinery that can be dangerous if not operated properly. Some common safety risks include:
A rig’s location and layout may expose it to natural hazards. Offshore, it can be storms and tides with humidity and sun exposure, but onshore, it is extreme heat or cold temperatures. They all can lead to equipment malfunction or the structure’s collapse.
In addition to physical safety, specific risks to certain locations can also affect employees’ mental and emotional well-being. For example, working long shifts in isolation or humid conditions and being exposed to excessive noise or heavy machinery can all lead to decreased attention span and increased accidents.
The oil and gas industry is particularly vulnerable to fires and explosions due to the large quantities of flammable materials. A tiny spark or leak can easily lead to a major disaster.
The risk of explosions and fires increases in enclosed spaces, such as wellheads or tanks containing hydrocarbons. Poor quality equipment, incorrect use of tools, and ill-informed decisions can all lead to a fire or explosion.
Drilling equipment requires electricity, and electric shock is always a risk. All electrical equipment must be correctly insulated and grounded before being used by workers to reduce the risk of injury.
Other risks include slips and falls, manual handling, hazardous materials, and improper operation of machinery. Following safety protocols and training workers on how to use drilling equipment can prevent these issues.
Below are the seven steps commonly used in oil and gas drilling operations:
With the construction of pads and access roads complete, drilling can begin. Traffic plans, noise barriers, safety procedures, etc., are all executed with precision and constantly monitored to ensure that they comply with state and local laws.
After the drill rig is brought to the location and assembled—which takes around 20 or 30 truckloads—it’s finally time to start drilling for oil and natural gas. The well is plugged directly into the ground beneath the pad. The first stage is surface drilling, which goes down 100 feet below the deepest known aquifer, a body of rock holding groundwater. A steel casing surrounds the hole to prevent pollution.
An initial “long hole” is drilled to a depth of around 1,000 feet (about 304 meters), followed by a horizontal hole through the same rock bed for about a mile or two. Technology is needed to keep the hole from straying more than 10 feet (3.05 meters) from its original interval, but this allows the well to access energy across a much longer distance.
By horizontal drilling, drillers can use only one drilling pad for numerous wells, reducing the impact and scope of aboveground land disturbance.
After attaining the target distance, extracting the drill pipe, and pushing the steel pipe to the bottom, this “well casing” is cemented. Natural gas and oil production can’t begin until several tests verify that the pipe doesn’t leak.
Before drillers can extract oil and natural gas, they must lower a perforating gun into the ground and shoot it at the rock layer in the deepest part of the well. It creates holes that connect the rock holding oil and natural gas with the wellhead.
After opening the first stage of the well, it’s time to get the oil and gas trapped within the rock by pumping fracking fluid, which is 99.5 percent water and sand, with 0.5 percent chemicals, into perforating holes at high pressure, creating cracks in the shale rock that release oil and gas stored within. Monitoring this process closely with specialized instruments ensures optimal results.
Fracking is repeated until the entire wellbore has been fracked, which could take 20 to 30 times. Although it might sound like a long process, it typically only takes a few days from start to finish.
Production begins after fracking. Oil and natural gas come up from the well bore. Fracturing fluid is saved and used again in other fracking operations.
Once the well stops producing oil or gas, it must be decommissioned and abandoned. It involves removing all surface infrastructure, such as steel pipes, and restoring the land to its original state. This final step is a crucial part of the entire process, preserving the environment in a healthy, intact condition.
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In an emergency, Occupational Safety and Health Administration (OSHA) requires that every drilling site have a response plan. The necessary actions will vary depending on the rig’s location and layout. Drilling safety precautions include:
The following PPE is required for all crew members on horizontal directional drilling job sites per OSHA and Vermeer guidelines:
There are three primary types of drilling mud: water-based, oil-based, and synthetic-based. The drilling process may use any kind, or a combination of two or more, depending on the location and environmental regulations of the well.
Various types of wells can be drilled, each best suited for a different configuration of hydrocarbons. By adopting specific drilling strategies, you can place wells in optimized patterns to maximize production from a field. Below are the different types.
Anticipating problems and taking preventative action is essential to avoid costly delays. Some of the most common issues with drilling include:
Safety is paramount in oil drilling operations, and SafetyCulture provides the perfect platform to ensure safety compliance. With SafetyCulture, you can do the following:
SafetyCulture Content Team
The SafetyCulture content team is dedicated to providing high-quality, easy-to-understand information to help readers understand complex topics and improve workplace safety and quality. Our team of writers have extensive experience at producing articles for different fields such as safety, quality, health, and compliance.
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