Petroleum Torque On Bit Calculator
Reconcile actual on/off-bottom surface torque and independently measured transmission factors into signed apparent bit torque, not drive commands or string mechanical safety. Caller independently verifies units, applicability and matching conditions; no operational recipe, safety certification, causal efficacy or legal/resource classification is inferred.
Description
Surface torque includes contributions beyond the bit and may need a matched off-bottom correction.
Surface torque includes contributions beyond the bit and may need a matched off-bottom correction.1
This audit subtracts the supplied baseline and applies an independently measured transmission fraction, retaining a signed apparent bit torque.
When to use Petroleum Torque On Bit Calculator
Use this tool when you need to calculate the stated measurement summary or conditional model from matched observations. Prepare completed matched measurements, SI or explicitly stated oilfield units, and independent evidence for the selected branch or calibration.
How to use Petroleum Torque On Bit Calculator and understand its results
- Prepare completed matched measurements, SI or explicitly stated oilfield units, and independent evidence for the selected branch or calibration.
- Enter observedSurfaceDriveTorquesNm, observedMatchedOffBottomTorquesNm, callerIndependentlyMeasuredTransmissionFractions, following the field table and calculation rules below, then run the tool.
- Read observedTransmissionCorrectedBitTorquesNm. For result objects, inspect the nested output fields below, including any missing evidence or selected indices.
- Correct any input issues and run again. Before using a successful result, review its units, signs, evidence coverage, and stated model or reference assumptions.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| observedSurfaceDriveTorquesNm | Observed surface drive torques nm | list of number | Required |
| observedMatchedOffBottomTorquesNm | Observed matched off bottom torques nm | list of number | Required |
| callerIndependentlyMeasuredTransmissionFractions | Caller independently measured transmission fractions | list of number | Required |
Require nonempty aligned nonnegative surface and off-bottom torques in N·m and transmission fractions in [0,1]. Subtract off-bottom from surface and multiply by the fraction for each pair. Negative residuals remain visible rather than being reset to zero.
apparentBitTorqueNm=(surfaceTorqueNm−offBottomTorqueNm)×transmissionFraction Read these symbols with the field meanings and branch or reference rules above.
| Output field | Meaning | Value type |
|---|---|---|
| observedTransmissionCorrectedBitTorquesNm | Observed transmission corrected bit torques nm | list of number |
{
"input": {
"observedSurfaceDriveTorquesNm": [
100,
200
],
"observedMatchedOffBottomTorquesNm": [
20,
50
],
"callerIndependentlyMeasuredTransmissionFractions": [
0.8,
0.9
]
},
"output": {
"observedTransmissionCorrectedBitTorquesNm": [
64,
135
]
}
}Limitations and assumptions
Measurements, unit conventions, branch identity, and model applicability must be independently established. The result does not infer a complete reservoir or flow model, operational settings, or a reserve classification.
Missing required fields, unknown fields, wrong types, and violated calculation rules return input issues. Numeric values must be finite; nonfinite numeric outputs are rejected. Arrays must be dense, with no missing cells. Numeric lists allow at most 10000 entries, subject to smaller tool-specific bounds above.
Alternative or Complementary methods
For a related task, use Petroleum Nozzle Pressure Drop Calculator: A measured bit pressure differential can include losses outside the nozzle contribution. This audit subtracts an independently measured non-nozzle loss from upstream-minus-downstream pressure and retains signed residuals. For a complementary step, use Petroleum Casing Biaxial Correction Calculator: The plane-stress von Mises relation gives an ideal hoop-stress yield root when axial stress and uniaxial yield are specified. This audit uses its positive root and returns the signed gap from measured hoop stress, without giving a manufacturer casing rating.
References
-
Petroleum Torque On Bit Calculator — tool.io
Similar or alternative tools
- Petroleum Nozzle Pressure Drop Calculator
A measured bit pressure differential can include losses outside the nozzle contribution. This audit subtracts an independently measured non-nozzle loss from upstream-minus-downstream pressure and retains signed residuals.
- Petroleum Casing Biaxial Correction Calculator
The plane-stress von Mises relation gives an ideal hoop-stress yield root when axial stress and uniaxial yield are specified. This audit uses its positive root and returns the signed gap from measured hoop stress, without giving a manufacturer casing rating.