Sucker Rod and Coupling Inspection Process

Sucker Rod TransportationTransportation

Rods are loaded onto our trucks at your location using support stripping to prevent bending.  In areas where multiple wells are to be picked up, within short distances of our plants, we have developed trailers with an innovative crane device.  For long distance locations we utilize sleeper tractors.

All of our transportation equipment is in excellent condition.  We realize that our drivers are, in many instances, our Company’s most visible representative.  Therefore, we make certain they are highly qualified to represent us in the most professional manner.

Identification and Tagging

After the rods arrive at our plants they are lifted to a holding area where they are uniquely identified according to size, quantity, company name and well location and tagged appropriately. This identity is maintained throughout the entire inspection and reconditioning process.

Initial Cleaning

Rods are dipped in a hot kerosene bath to remove paraffin, grease and other foreign materials. Once the rods are clean, they are moved into the plant, where the reconditioning process begins.

Initial Inspection

This first step in the reconditioning process involves visually locating pitting, corrosion, wear, stretched rods and bent rods.  Any rod failing to pass this inspection is removed from the plant. Any rods that are bent, bowed, or have rod guides on them are removed and sent to the rod straightening machine or the rod guide removal machine.  Once they are straight and have the rod guide removed, they are returned to the plant for their reconditioning process.

Sucker Rod Coupling RemovalCoupling Removal

All couplings are removed with a specially designed hydraulic device.

Pin End Cleaning

End areas are buffed and cleaned to parent metal.

Second Inspection

Once the pins are cleaned they are inspected and gauged.  Any rod that is rejected is removed from the plant.

Shot Cleaning

Rust, scale and other surface materials are removed.

Sucker Rod Shot PeeningShot Peening (Unique to TRC)

This process is a cornerstone part of what makes TRC materially different.  It is why we consider ourselves a reconditioning Company…not a reclamation Company.  The process will increase the life of your used rod between 50%-100%.  Please take the time to learn more about the many benefits of shot peening by clicking here.

Magnetic Normalization (Unique to TRC)

After exiting the shot peener and just prior to the Eddy Current inspection, the rod passes through our magnetic normalizing device.  Typically used rods have a residual magnetic field in the body of the rod.  This magnetic field is not consistent within the lot to be reconditioned.

The magnetic inconsistency has a dramatic effect on the Eddy Current inspection, causing inaccurate results from the Eddy Current inspection.  By creating a consistent magnetic field in the rod, prior to the Eddy Current inspection, consistent, reliable inspection results are achieved.

Magnetic normalization increases the likelihood of flaw detection, and thereby greatly reduces the likelihood of a sucker rod failure caused by localized stress, fatigue, and improper normalization of the upset run out.

Sucker Rod Plant

Third Inspection

Once the rod is shot peened it is full length inspected by an Eddy Current Device.  This device identifies fatigue, embrittlement and irregular normalizing in the rod body.

Fourth Inspection

The rod then goes into our rotating laser measurement unit where the entire rod diameter is examined to determine if it is within specifications.

Sucker Rod EMI InspectionFifth Inspection

The rod then goes into our EMI inspection unit where injurious pits and cracks are identified.  Any rod that is rejected during this, or prior, process is removed from the plant.

End Area

Wet magnetic particle inspection detects cracks in the thread area, undercut area, wrench flat area, upset, and transition area.

End Area Protection

Liberal amounts of corrosion inhibitor lubricant and a new protector is applied.


Sucker Rod Corrosion Inhibitor

The sucker rod is then run through a device that removes the residual magnetic field in the rod that was induced for inspection purposes to an acceptable level.

Rod Protection

An amine-based corrosion inhibitor is automatically applied, which will provide corrosion protection during storage, and approximately two weeks downhole protection.

Color Coding

Each rod is color coding as to the final grade of the reconditioned rod.  After the rod has been coded, it is removed from the plant and placed into storage for inventory control.



Sucker Rod Coupling CleaningCleaning

A tumble cleaning process designed to remove foreign materials and surface polish the outside of the coupling is used prior to any inspection process are performed.

Magnetic Particle Inspection

This technique will reveal longitudinal and/or transverse cracks in the threaded area and on the outside surface. Any coupling that is rejected is removed from the plant.

Seating Areas

A work gauge and feeler gauge is used to verify compliance.

Coupling RefacingRefacing

Couplings that can be refaced in accordance with new API specifications are refaced using a refacing machine.  Any couplings that cannot be refaced are removed from the plant.

Corrosion Protection and Storage

All couplings are dipped in an inhibitor for protection.  Once dried the couplings are boxed.  The boxes are stored inside the coupling inventory area of the plant.