Downsize a Pump Before a Rod Pull
A rod pull for offset frac protection is a chance to change the pump. The question is whether a smaller pump still makes the rate at a load the unit carries well.
PERM-4821 is having its rods pulled for offset frac protection. Based on last month's average production, use RodSim to see if we can downsize the pump to 1.75 in or 1.5 in.
- get-well-production
- execute-simulation
- compare-simulations
Both sizes make the 200 bfpd target. The 1.75 in pump drops gearbox load from 96% to 86% at 7.1 SPM. The 1.5 in pump needs 9.2 SPM and gains little, so 1.75 in fits best.
| 2.0 in | 1.75 in | 1.5 in | |
|---|---|---|---|
| Stroke rate | 5.6 SPM | 7.1 SPM | 9.2 SPM |
| Fluid rate | 200 bfpd | 200 bfpd | 200 bfpd |
| Gearbox load | 96% | 86% | 84% |
| Max rod stress | 88% | 81% | 78% |
| System efficiency | 33% | 31% | 27% |
Example result
Read the Result
A smaller pump needs more stroke rate for the same rate, so gearbox load does not keep falling. Run each size.
- 1
get-well-productionReads the last 30 days and takes the average rate as the target.
- 2
execute-simulationClones the current design and runs one draft per pump size at that target.
- 3
compare-simulationsPuts stroke rate, gearbox load and rod stress side by side.
More Workflows
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Diagnose a Gearbox Overload
A well keeps shutting down on gearbox alarms. Read the design, the production and the last fluid shot in one prompt, then test a fix in RodSim.
-
Find Safe Operating Conditions
Run 1,221 cases across stroke rate, pump intake pressure and separation with RodSim Dynamics, then ask which limits fail first.
Run This on Your Own Wells
Your PetroBench account team turns on MCP access for your organization. Then ask your first question in plain words.
