Unseating rod bottom hole pumps (BHPs) often turns into a tubing move job due to issues like seizing, sand, or scale in the pump seat nipple (PSN). These problems exceed the corod rig’s capacity, causing rod shear failures. Shear pins, wellhead BOP ram bolts, and debris frequently get BHPs stuck, especially in deviated wells where full pull is impossible, requiring rod cutting and service rig intervention.

We introduced a concept that uses vibration (harmonic waves) to regain string movement. This method re-orients debris, channels fluid past sanded-off strings, and breaks down scale around BHP seating rings. The design, inspired by a guitar string, increases vibration frequency with tension. Abrupt tension changes generate spikes, enhancing downhole vibration. The stuck BHP acts like a tubing anchor, concentrating vibration at the stuck point with increased tension.