Factory Acceptance Checks for a Truck-Mounted Workover Rig
How buyers can define practical pass or fail checks for a truck-mounted onshore workover rig, using the stated hook load and depth figures as reference points in the FAT plan.
A buyer should decide up front which functions must be proven at the factory rather than at the wellsite, and write each as a pass or fail line in the acceptance plan. For a truck-mounted onshore workover rig, that means separating structural and load-path checks from carrier and control checks.
Ask the supplier to state how the maximum static hook load of 1,125 kN and nominal hook load of 800 kN will be verified, and whether the test is static only or includes a functional cycle. Confirm how the 4,500 m workover depth with 2-7/8 in drill pipe is demonstrated, for example through a documented load chart rather than a full-depth test. For the 10×8 carrier drive, define pass criteria for travel functions, parking brake holding, and mast raising and lowering interlocks.
Useful questions for the RFQ or demonstration: which instruments are calibrated and traceable, what tolerances apply to load readings, which safety interlocks are tripped deliberately, and what records are handed over. Treat catalog values as reference figures until the supplier confirms them for the supplied unit.
Before requesting a quote, confirm with the supplier which tests are witnessed, what pass limits apply to each, and how deviations are recorded and closed.