Skid-Mounted Test Separators for Harsh Oilfield Conditions
Oilfield equipment is rarely installed in an easy operating environment. Production sites can expose equipment to extreme temperatures, corrosive fluids, hydrogen sulfide, moisture, abrasive materials, vibration, and continuous outdoor conditions.
For equipment used during well testing and production, reliability under these conditions is critical.
Skid-mounted test separators for harsh oilfield conditions provide operators with a durable, transportable solution for separating and measuring production fluids while supporting safe and efficient field operations. When properly designed and manufactured, these systems can withstand demanding environments while minimizing maintenance and reducing the potential for unexpected downtime.
At Smith Industries, skid-mounted testers are manufactured with robust construction, NACE-compliant materials, multiple coating options, and pressure vessel components built in accordance with applicable ASME Code requirements.
What Are Skid-Mounted Test Separators?
Depending on the application, a separator may be designed for two-phase or three-phase separation.
In two-phase separation, gas is separated from liquids. In a three-phase system, the equipment separates gas, oil, and produced water into individual streams.
The U.S. Environmental Protection Agency explains that separation is one of the first processing steps at many oil and natural gas production facilities. Produced fluids may need to be separated into oil, gas, and water before additional processing, storage, or transportation takes place.
The EPA also notes that separation equipment may operate under a range of pressure conditions depending on the production environment.
Mounting this equipment on a fabricated skid creates a complete package that can be transported to the field and positioned where it is needed.
Why Harsh Oilfield Conditions Affect Equipment Design
Oilfield production equipment may remain outdoors for years while being exposed to weather and difficult process conditions.
Common challenges can include:
Hydrogen sulfide exposure
Corrosive produced fluids
High operating pressures
Temperature fluctuations
Rain and moisture
Dust and debris
Continuous ultraviolet exposure
Vibration
Abrasive materials
Frequent transportation or relocation
These conditions can gradually affect piping, vessels, structural components, coatings, fittings, and other parts of the equipment.
OSHA specifically warns that severe outdoor operating conditions can accelerate corrosion and metal fatigue. The agency recommends proper equipment design, material selection, routine inspection, and increased inspection frequency when equipment is exposed to particularly corrosive conditions.
For skid-mounted test separators for harsh oilfield conditions, durability therefore needs to be considered throughout the design and manufacturing process.
Materials Matter in Sour Service Environments
One of the most important considerations is the composition of the production stream.
Some oil and gas wells contain hydrogen sulfide, commonly referred to as H2S. Equipment operating in environments containing H2S requires additional attention because the gas can contribute to corrosion and certain forms of material cracking.
OSHA notes that H2S can cause metals to become thinner or brittle and specifically directs operators to consider appropriate materials for equipment expected to encounter H2S.
Materials intended for sour oilfield environments may therefore need to meet requirements established by industry standards such as NACE MR0175 and ISO 15156.
Research published through the Association for Materials Protection and Performance, formerly NACE International, has documented the long-standing challenges associated with sour corrosion and the importance of understanding the factors that affect material performance in these environments.
Smith Industries can manufacture skid-mounted testers using NACE-compliant materials when required by the service conditions.
Coatings Provide Another Layer of Protection
Material selection is only one part of protecting oilfield equipment.
Interior and exterior coatings can also help protect components from the process stream and surrounding environment.
The appropriate coating depends heavily on the application.
Interior surfaces may encounter hydrocarbons, produced water, chemicals, and other process materials. Exterior surfaces may experience sunlight, precipitation, humidity, salt, chemicals, and temperature changes.
Selecting coatings based on actual operating conditions can help reduce corrosion and extend equipment service life.
Smith Industries offers numerous interior and exterior coating options so each skid-mounted tester can be configured around the conditions it is expected to encounter.
ASME Code Construction for Pressure-Containing Equipment
A test separator is more than a structural skid and collection of piping. At the center of the system is a pressure vessel that must safely contain the fluids and gases produced during operation.
That makes proper pressure vessel engineering and fabrication especially important.
Smith Industries manufactures test separators in compliance with applicable ASME Code requirements. ASME requirements address areas such as pressure vessel design, materials, fabrication, examination, inspection, and testing.
Building the pressure vessel correctly from the beginning helps create equipment capable of performing reliably under its specified operating pressure and temperature conditions.
Inspection and Pressure Testing Before Delivery
Reliability in the field starts before equipment leaves the manufacturing facility.
Smith Industries pressure tests every test separator and conducts a rigorous series of inspections prior to delivery.
These quality control procedures help identify potential manufacturing issues before equipment is placed into service.
Testing and inspection are particularly important for skid-mounted test separators for harsh oilfield conditions because field repairs can be expensive and disruptive. A fabrication issue discovered at the manufacturing facility is considerably easier to address than the same problem identified after equipment has been transported and installed at a remote production site.
A strong quality control program can help operators reduce that risk.
Heavy-Duty Skid Construction
The skid itself also plays an important role in long-term reliability.
A well-designed skid provides structural support for the vessel, piping, valves, instrumentation, and other equipment while creating a package that can be transported and positioned in the field.
Skid design may need to account for:
Overall equipment weight
Vessel size
Piping arrangements
Operating loads
Transportation requirements
Lifting points
Access for operators
Maintenance requirements
Available site footprint
Smith Industries currently manufactures typical skid-mounted tester packages ranging from approximately 6 feet by 15 feet to 10 feet by 40 feet.
This range allows systems to be configured around different production requirements and site limitations.
Designing for Safe and Easy Operation
Durability should not come at the expense of usability.
Operators need reasonable access to valves, instruments, drains, piping connections, and other components used during normal operation and maintenance.
A carefully planned skid layout can make equipment easier to operate, inspect, and maintain.
This becomes particularly valuable at remote oilfield locations where unnecessary maintenance or complicated servicing can create additional costs.
Smith Industries designs skid-mounted testers around safe, straightforward operation while using robust construction intended to support long-term, low-maintenance service.
Custom Skid-Mounted Test Separators for Harsh Oilfield Conditions
There is no single configuration that works for every production facility.
Well conditions, production rates, pressures, fluid composition, site layouts, corrosivity, and customer specifications can all influence equipment design.
That is why custom fabrication can provide significant advantages.
Rather than attempting to adapt a standard package to an unusual application, operators can specify a skid-mounted tester around the conditions the equipment will actually experience.
Important specifications may include:
Vessel size
Design pressure
Design temperature
Process fluid composition
Sour service requirements
Material requirements
Interior coatings
Exterior coatings
Skid dimensions
Piping configuration
Instrumentation
Connection requirements
The result is equipment designed for the specific environment instead of a generic package expected to work everywhere.
Skid-Mounted Test Separators Built for the Oilfield
Harsh production environments place significant demands on oil and gas equipment. Corrosion, pressure, temperature, H2S exposure, weather, and continuous operation can all affect equipment reliability over time.
Selecting skid-mounted test separators for harsh oilfield conditions means looking beyond basic vessel capacity.
Materials, coatings, structural construction, pressure vessel requirements, inspection procedures, accessibility, and overall skid design all contribute to long-term performance.
Smith Industries manufactures robust skid-mounted testers designed for safe and easy operation in demanding oilfield environments. With NACE-compliant material options, custom interior and exterior coatings, ASME Code construction, pressure testing, rigorous inspection procedures, and skid sizes ranging from 6 feet by 15 feet to 10 feet by 40 feet, each system can be built around the needs of the application.
If you are planning a new well testing application or need skid-mounted separation equipment built for demanding operating conditions, contact Smith Industries to discuss your specifications and fabrication requirements.
Comments