Oilfield equipment is not always located in a place where it can be easily transported to an inspection facility.
Equipment may be sitting at a service yard, maintenance facility, equipment rental location, or active field site. Some components may also be large, heavy, or part of a larger equipment package that is difficult to move.
In these situations, mobile NDT inspection can provide a practical way to bring inspection capabilities to the equipment.
Instead of moving the equipment to another location, an inspection team can travel to the site when the project and equipment are suitable for onsite testing.
What Is Mobile NDT Inspection?
Mobile NDT inspection is nondestructive testing performed at or near the location where equipment is stored or operating.
NDT stands for nondestructive testing. These methods allow applicable components and materials to be examined without destroying them.
The inspection method depends on the equipment, material, condition, accessibility, and required inspection scope.
Mobile inspection can be useful for equipment such as:
- Oilfield equipment
- Pressure-control components
- Wireline equipment
- Pump-down equipment
- Flow iron
- Other specialized industrial equipment
The exact services available depend on the equipment and project requirements.
Why Use Onsite NDT Inspection?
Transporting industrial equipment can require additional time, labor, handling, and logistics.
For some projects, moving the equipment may not be practical.
Onsite inspection can reduce the need to transport equipment when the equipment and inspection requirements are suitable for mobile work.
Some common reasons companies may consider mobile NDT include:
- Equipment is difficult to transport
- Equipment is already at a field location
- Multiple components are located at one site
- Inspection is needed before equipment is moved
- A maintenance facility needs onsite testing
- Equipment needs inspection during a planned maintenance activity
Mobile inspection is not automatically the right choice for every project. The equipment and inspection scope should be reviewed before scheduling the work.
What Types of Equipment Can Be Inspected?
The type of equipment suitable for mobile inspection depends on the inspection method and project requirements.
Oilfield equipment may include specialized components that require examination before being returned to service.
Examples can include:
- Wireline equipment
- Pump-down equipment
- Flow iron
- Valves
- Pressure-control components
- Other applicable oilfield equipment
The inspection provider should review the equipment before determining which NDT methods are appropriate.
For background on NDT for oilfield equipment, read What Is NDT Testing? A Practical Guide for Oilfield Equipment.
Mobile Inspection for Wireline Equipment
Wireline equipment can be located at yards, service facilities, or field operations.
Transporting individual components to another inspection location may not always be convenient.
For suitable projects, onsite NDT can allow applicable wireline components to be inspected where they are located.
The inspection scope may depend on the equipment type, previous inspection results, service history, and intended use.
A company should provide equipment identification and previous inspection information whenever available.
Mobile Inspection for Pump-Down Equipment
Pump-down equipment can also be distributed across different locations.
An inspection may be required before the equipment is returned to service, after maintenance, or as part of an established inspection program.
Mobile inspection can be considered when transporting the equipment would create unnecessary logistical challenges.
The inspection team should still determine whether onsite testing is appropriate based on the equipment and required inspection methods.
Mobile Inspection for Flow Iron
Flow iron can include multiple components and assemblies that may be difficult to move.
Depending on the inspection scope, onsite testing can provide a way to examine applicable equipment at the location where it is stored.
The equipment should be properly identified and accessible before the inspection begins.
Previous inspection reports, maintenance records, and known equipment issues can also help the inspection team understand the project.
What Happens During a Mobile NDT Inspection?
The process depends on the equipment and inspection scope, but a typical project may involve several stages.
1. Project Review
The inspection provider first needs to understand what equipment requires inspection.
Useful information may include:
- Equipment type
- Quantity
- Location
- Equipment identification
- Previous inspection reports
- Known issues
- Required timeframe
This information helps determine whether mobile inspection is suitable.
2. Site and Equipment Preparation
The equipment should be accessible to the inspection team.
Depending on the equipment and testing method, preparation may include cleaning surfaces, removing obstructions, or making specific areas accessible.
3. Inspection Method Selection
The appropriate NDT method depends on the equipment and inspection requirements.
There is no universal test that should be applied to every oilfield component.
4. Onsite Examination
The inspection team performs the applicable examination according to the agreed scope and procedures.
The equipment should be identified clearly so the inspection results can be associated with the correct component.
5. Documentation
Inspection findings and applicable test information should be documented.
Good documentation creates a record that can be used for future maintenance and inspection planning.
Does Mobile NDT Replace a Visual Inspection?
No.
Visual examination and NDT serve different purposes.
A visual inspection can identify visible conditions such as:
- Corrosion
- Surface damage
- Deformation
- Dents
- Leaks
- Missing components
NDT can provide additional information when a more detailed examination is required.
The appropriate combination depends on the equipment and inspection scope.
For this reason, mobile NDT should be considered part of an overall inspection process rather than simply a replacement for visual examination.
When Is Mobile NDT a Good Fit?
Mobile NDT may be useful when the equipment is difficult to transport or when the inspection needs to take place at the equipment’s current location.
It may make sense when:
- Equipment is already at an oilfield yard
- Equipment is located at a remote facility
- Large components would be difficult to transport
- Several pieces of equipment need inspection at one location
- Inspection is part of onsite maintenance
- Equipment needs to be examined before transportation or deployment
The final decision depends on the equipment, inspection method, site conditions, and project requirements.
When Might Onsite Inspection Not Be Suitable?
Mobile inspection has practical limits.
Some projects may require equipment, conditions, or facilities that are not available at the current location.
Issues that may affect onsite inspection include:
- Limited equipment access
- Unsafe site conditions
- Inadequate workspace
- Poor surface condition
- Required equipment not available onsite
- Inspection methods that are not suitable for the location
The inspection provider should review these factors before scheduling the project.
Preparing Equipment for Mobile NDT Testing
Good preparation can help prevent delays.
Before the inspection team arrives, companies should have the following information available:
- Equipment identification
- Equipment specifications
- Previous inspection reports
- Maintenance records
- Repair history
- Known problems
- Equipment location
- Required inspection date
- Site access information
The equipment itself should also be accessible.
If surfaces require cleaning before examination, that should be addressed as part of the inspection preparation.
For broader information about the connection between equipment cleaning and inspection, see Industrial Process Equipment Cleaning, Inspection, and Maintenance.
Mobile NDT Inspection and Equipment Records
Inspection results are most useful when they can be connected to the correct piece of equipment.
This is particularly important when companies manage large inventories.
An inspection record may contain:
- Equipment identification
- Inspection date
- Inspection type
- Inspection findings
- Inspector information
- Repair or maintenance notes
- Equipment status
- Follow-up requirements
Keeping this information organized creates a clearer equipment history.
It can also help maintenance teams understand what was inspected and when.
Mobile NDT Inspection for Multiple Equipment Items
Some oilfield companies may have several components at the same location.
When practical, inspecting multiple pieces of equipment during one onsite visit may simplify scheduling and logistics.
The inspection provider can review the equipment list before the visit and determine what can be included in the project scope.
Equipment should still be individually identified so that each inspection result is connected to the correct component.
Mobile NDT Inspection in Texas
Texas oilfield operations can involve equipment spread across service yards, maintenance facilities, and field locations.
For suitable projects, Rock Hill Industrial provides NDT testing services in Texas for applicable equipment.
The location itself does not determine the inspection method. Equipment type, condition, accessibility, and inspection requirements remain important factors.
Mobile NDT Inspection in Oklahoma
Oklahoma operators may also have oilfield equipment located across multiple facilities and field locations.
Rock Hill Industrial provides NDT testing services in Oklahoma for applicable inspection projects.
Companies should provide equipment information and site details before the inspection so the scope can be properly reviewed.
How Mobile NDT Supports Equipment Maintenance
Inspection is one part of equipment maintenance.
When inspection findings are combined with service history, repair records, and previous testing, equipment managers can develop a better record of equipment condition.
This can help support maintenance planning and future inspection decisions.
The goal is not simply to complete an inspection. The goal is to create useful information that can be tracked over the life of the equipment.
Questions to Ask Before Scheduling Mobile NDT
Before arranging an onsite inspection, companies may want to confirm:
- What equipment needs to be inspected?
- Where is the equipment located?
- Is the equipment accessible?
- Which inspection methods may be required?
- Are previous inspection records available?
- Does the equipment require cleaning first?
- What site safety requirements apply?
- How will inspection results be documented?
Having these details ready can make the planning process more efficient.
Mobile NDT Inspection With Rock Hill Industrial
Rock Hill Industrial provides NDT inspection capabilities for applicable oilfield equipment, including mobile inspection services.
The inspection scope can be developed around the equipment, location, condition, and project requirements.
For companies that need inspection at a yard, maintenance facility, or suitable field location, onsite NDT can provide an alternative to transporting equipment elsewhere.
The right approach depends on the equipment and the inspection requirements.
Final Thoughts
Mobile NDT inspection can be useful when oilfield equipment needs to be examined at its current location.
It can reduce the need to transport large or specialized components and can support inspection projects at suitable yards, facilities, and field locations.
However, onsite testing is not automatically appropriate for every piece of equipment. The inspection method, site conditions, accessibility, equipment condition, and project requirements should all be reviewed beforehand.
With proper preparation and documentation, mobile NDT can become a practical part of an oilfield equipment inspection program.
If you have equipment that needs onsite NDT inspection, contact Rock Hill Industrial to discuss the equipment, location, and inspection requirements.