Drill Pipe Discharge — Crane Simulation (bird's-eye)

Settings

Lifts (hooks) in this hold×

Pipes per liftpc

Crane 1 — full roundhold → pick up → hoist → quay → land → backs

Crane 2 — full roundswing in → pre-lift + sling next bundle → swing backs

Tip: with 1 crane the same crane does the pre-slinging itself, so the two times run one after another. With 2 cranes they run at the same time — you go as fast as the slower crane.

Economics (optional)

2nd crane + gang $/hour$

Vessel time value $/hour$

Bird's-eye view

Speed 24×

Mode: 2 cranes Lifts landed: 0 / 60 Sim clock: 0m 00s Est. total this hold: –

Result

1 crane — total

–

2 cranes — total

–

Time saved

–

Throughput 2-crane

–

lifts / hour

1-crane cycle / lift

2-crane cycle / lift

Crane 1 utilisation (2-crane)

Crane 2 utilisation (2-crane)

How the model works

One crane: the crane does the pre-slinging itself and then the lift, one after the other → time per lift = Crane 1 + Crane 2.

Two cranes: Crane 2 pre-slings the next bundle while Crane 1 is delivering the current one, so they overlap → time per lift = max(Crane 1, Crane 2). You go as fast as the slower crane. If Crane 2 is slower than Crane 1, it sets the pace (bottleneck).

Total = time per lift × number of lifts. Times are your own round-time estimates for each crane; tune them to your gang and vessel.