Oilfield equipment can go through many cycles of use, maintenance, repair, storage, and redeployment. Over time, equipment owners need reliable records that show what was inspected, what was found, and what work was performed.
This becomes especially important when equipment needs to be evaluated for recertification or continued service.
Nondestructive testing (NDT) can be an important part of that evaluation when the equipment and applicable requirements call for it. NDT allows certain components to be examined without destroying them, helping inspectors identify conditions that may require further review.
However, recertification is not simply a matter of performing one NDT test. The process can involve equipment history, previous inspection reports, maintenance records, repairs, visual examination, testing, and the requirements that apply to the specific equipment.
What Is Oilfield Equipment Recertification?
Oilfield equipment recertification generally involves evaluating equipment to determine whether it continues to meet the applicable requirements for its intended use.
The exact process depends on the equipment, its application, company procedures, and applicable industry or regulatory requirements.
A recertification review may consider:
- Equipment identification
- Previous inspection records
- Maintenance history
- Repair records
- Equipment condition
- Previous NDT results
- Pressure-testing records
- Service history
- Applicable inspection requirements
The purpose is to establish a documented basis for the equipment’s continued use or identify issues that require attention before it can be used again.
Why Is NDT Used During Equipment Recertification?
Visual inspection can identify many visible conditions, but it does not provide information about every possible material or component condition.
NDT can provide additional examination when required.
Depending on the equipment and inspection scope, appropriate NDT methods can be used to evaluate applicable areas without damaging the component.
This can be useful when equipment has:
- Been in repeated service
- Undergone repairs
- Experienced demanding operating conditions
- Reached a scheduled inspection point
- Had previous inspection findings
- Been stored for an extended period
- Been prepared for another field operation
The specific NDT method should be selected according to the component and inspection requirements.
For a basic explanation of nondestructive testing, see What Is NDT Testing? A Practical Guide for Oilfield Equipment.
Recertification Starts With Equipment Identification
Before inspection begins, the correct equipment needs to be identified.
This may sound simple, but it becomes important when an oilfield company manages many similar components.
Equipment identification may include:
- Serial number
- Asset number
- Component identification
- Manufacturer information
- Model information
- Equipment type
The inspection results should be connected to the correct piece of equipment.
Without accurate identification, an inspection report can become difficult to use later.
Reviewing Previous Inspection Records
Previous inspection reports provide useful background for a recertification review.
They may show:
- When the equipment was last inspected
- Which areas were examined
- What methods were used
- Whether previous findings were recorded
- Whether repairs were recommended
- Whether follow-up testing was required
Comparing current findings with previous records can also help provide a clearer equipment history.
For companies managing large inventories, maintaining organized records can make future inspection planning easier.
Equipment Repair History Matters
Repairs can affect the condition and inspection requirements of a component.
For example, equipment that has been repaired may require additional examination depending on the type of repair and the requirements applicable to that equipment.
The inspection team should have access to relevant repair information whenever available.
Useful records may include:
- Description of the repair
- Date of repair
- Component affected
- Repair documentation
- Previous inspection findings
- Follow-up inspection results
This information gives the inspection team additional context when evaluating the equipment.
What Happens During an NDT Inspection?
The exact process varies depending on the equipment and selected inspection methods.
A typical inspection project may involve several stages.
1. Equipment Review
The inspection team reviews the equipment and available records.
This can include equipment identification, previous inspection results, maintenance history, and the intended inspection scope.
2. Visual Examination
Applicable surfaces and components may be visually examined for obvious conditions.
These can include corrosion, deformation, damage, wear, or other visible issues.
3. NDT Testing
Where required, suitable NDT methods can be applied to the applicable areas.
The method depends on the component, material, accessibility, and inspection requirements.
4. Documentation
The inspection results are recorded and associated with the correct equipment.
5. Follow-Up
If an inspection identifies a condition requiring additional evaluation, the equipment owner can determine the appropriate next step according to the applicable procedure.
NDT Does Not Automatically Mean Recertification
It is important to separate NDT testing from recertification.
NDT is an inspection or testing method.
Recertification is a broader equipment evaluation process that may involve several types of information and requirements.
A successful NDT result does not, by itself, establish that every piece of equipment has been recertified.
The final requirements depend on the specific equipment, applicable standards or procedures, inspection scope, and responsible parties.
This distinction helps prevent companies from treating one inspection result as a complete certification decision.
What Equipment May Require Recertification?
Different oilfield equipment can have different inspection and recertification requirements.
Depending on the operation, companies may manage equipment such as:
- Wireline equipment
- Pump-down equipment
- Flow iron
- Pressure-control equipment
- Valves
- Specialized oilfield components
- Other pressure-related equipment
Each type of equipment should be evaluated according to its own requirements.
There should not be a single inspection schedule or testing method applied to every component simply because it is used in the oilfield.
How Equipment History Supports Recertification
An equipment history provides a record of how a component has been managed over time.
It can connect:
Equipment → Inspection → Findings → Repair → Retesting → Current Status
This type of record can be especially useful when equipment moves between locations or changes hands within an organization.
A complete history may contain:
- Inspection reports
- NDT results
- Maintenance records
- Repair documentation
- Pressure-test records
- Equipment movement
- Previous findings
- Current status
For broader information about the connection between inspection and equipment reliability, read Why Oilfield Equipment Inspection Matters for Equipment Reliability.
When Should Equipment Be Evaluated for Recertification?
The timing depends on the equipment and applicable requirements.
Companies may review equipment when:
- A scheduled inspection is due
- Equipment is returning to service
- A repair has been completed
- Previous findings require follow-up
- Equipment has been exposed to demanding service
- Equipment is being prepared for another operation
- Required documentation needs to be updated
The applicable inspection interval should come from the requirements governing the equipment rather than a generic schedule.
Preparing Equipment for Recertification Inspection
Preparation can help prevent unnecessary delays.
Before the inspection, equipment owners should gather relevant documentation.
This may include:
- Equipment identification
- Previous inspection reports
- Maintenance records
- Repair records
- Previous NDT results
- Pressure-testing information
- Known equipment issues
- Current equipment location
The equipment itself should also be accessible and in a condition suitable for the planned examination.
In some cases, cleaning may be required before inspection so applicable surfaces can be properly examined.
Cleaning Before NDT Inspection
Industrial equipment can accumulate oil, scale, corrosion products, process residue, and other materials during service.
Depending on the inspection method, these conditions may make certain surfaces harder to examine.
Equipment preparation should therefore be considered before the inspection begins.
Rock Hill Industrial provides industrial cleaning services that may support equipment maintenance and preparation. Its existing guide on industrial process equipment cleaning, inspection, and maintenance explains how cleaning and inspection can work together as part of equipment maintenance.
The appropriate preparation depends on the equipment and inspection method.
Pressure Testing and Recertification
Some equipment may also require pressure testing as part of its inspection or maintenance requirements.
Pressure testing and NDT provide different types of information.
A pressure test evaluates applicable equipment under a controlled pressure condition, while NDT examines applicable materials or components using nondestructive methods.
One does not automatically replace the other.
Where pressure testing is required, the test should be performed according to the applicable procedure and equipment requirements.
What Happens If NDT Finds an Indication?
An indication does not automatically mean that equipment has failed or must be removed from service.
The significance of an indication depends on factors such as:
- Location
- Size
- Type
- Material
- Component design
- Service conditions
- Applicable acceptance criteria
Additional evaluation may be required to determine what the finding means for the equipment.
The final decision should follow the applicable inspection procedure, engineering requirements, or other responsible authority.
Mobile NDT for Recertification Projects
Equipment does not always need to be transported to a central facility for inspection.
Some inspection projects can be performed onsite when the equipment, location, and required testing methods are suitable.
This can be useful when equipment is located at:
- Oilfield yards
- Service facilities
- Maintenance locations
- Industrial facilities
- Field operations
Rock Hill Industrial offers NDT testing and mobile inspection capabilities for applicable equipment.
Before arranging onsite inspection, the equipment, location, accessibility, safety requirements, and inspection scope should be reviewed.
Recertification Records Should Be Easy to Trace
Good documentation should make it possible to connect an inspection result to the equipment it belongs to.
A well-organized record can answer basic questions such as:
- What equipment was inspected?
- When was it inspected?
- What inspection method was used?
- What was found?
- Were repairs required?
- Was follow-up testing performed?
- What is the current equipment status?
This becomes particularly important when companies manage many similar components.
Common Mistakes in Equipment Recertification
Several documentation and planning problems can make equipment management more difficult.
Using the Wrong Equipment Record
Inspection results need to be connected to the correct asset.
Ignoring Previous Findings
Previous inspection reports can provide useful context for the next inspection.
Treating Visual Inspection as the Entire Process
Visual examination is useful, but some equipment may require additional NDT.
Using the Same Inspection Process for Every Component
Different equipment types can have different inspection requirements.
Poor Record Keeping
Missing inspection, repair, or maintenance records can make it harder to understand equipment history.
Waiting Until Equipment Is Needed
Planning an inspection at the last minute can create scheduling and logistics problems.
How Rock Hill Industrial Can Support NDT Inspection
Rock Hill Industrial provides NDT inspection capabilities for applicable oilfield equipment.
Its services include mobile inspection capabilities and NDT personnel with different levels of qualification.
The appropriate inspection approach depends on the equipment, condition, location, and project requirements.
For equipment owners preparing for an inspection or recertification-related evaluation, providing complete equipment information in advance can help the inspection team understand the scope.
Final Thoughts
NDT can be an important part of an oilfield equipment recertification process, but it is only one part of the larger picture.
Equipment identification, previous inspection reports, maintenance history, repair records, testing results, and applicable requirements can all contribute to a complete evaluation.
The specific inspection and recertification process depends on the equipment and the requirements that apply to it.
For companies managing specialized oilfield equipment, keeping accurate records and scheduling appropriate inspections can make it easier to understand equipment condition over time.
If you are preparing oilfield equipment for an NDT inspection or recertification-related evaluation, contact Rock Hill Industrial to discuss the equipment and inspection requirements.