Loss of Suction in Vacuum Transfer Systems is part of the drilling-waste handling system, not a vacuum-degasser duty. Loss of suction diagnosis should move from air leaks to pickup restriction, receiver sealing, blocked route and air supply recovery in that order.
Engineering Function
Loss of suction should be diagnosed in stages. Start with the obvious air leak and seal checks, then confirm pickup blockage, hose collapse, receiver level, valve position and air supply recovery. A weak pickup may be caused by a leak, but it can also be caused by material choking at the nozzle or a receiver that fails to complete the cycle. Correct diagnosis prevents unnecessary equipment changes.
Δ Cycle Time = Current complete cycle time - Baseline complete cycle timeA slower cycle with unstable pickup points to restriction, leakage or receiver control problems.Selection Matrix
| Loss of Suction in Vacuum Transfer Systems check | Required field evidence | Stop or redesign trigger |
|---|---|---|
| Duty definition | receiver cycling, route restriction, pickup condition, discharge availability and safe containment are recorded with units and operating state. | The duty is described only by equipment name or nameplate capacity. |
| Installed-route confirmation | Line length, elevation, valves, receiving point and material condition are checked. | The route cannot be restarted or isolated safely after a stop. |
| Process acceptance | The downstream process becomes stable after the correction. | One gauge improves while flow, quality or reliability gets worse. |
Calculated Checks
| Suction-loss review | Calculation basis | Field evidence |
|---|---|---|
| Suction-loss review | Check leak points, nozzle choking, hose collapse, receiver seal and air recovery | Step-by-step diagnosis sheet |
| Throughput confirmation | Net material moved after stoppages and delays | Receiving-point volume and shift log |
| Restriction check | Compare baseline cycle with current cycle response | Pressure, suction sound and route inspection |
| Restart control | Verify safe condition before returning to operation | Isolation, depressurization and restart record |
Operating Controls
A premium operating procedure defines safe start-up, normal cycling, line monitoring, emergency stop, isolation, depressurization, blockage clearing and restart. The crew should test leak, pickup, route and receiver causes in order before replacing components.
Field Use
This guide focuses on loss-of-suction troubleshooting and keeps diagnosis separate from vacuum degasser gas-removal problems.
