Oil & Gas
What this tool does
Tubing bore and casing-annulus fluid volume from the oilfield capacity factor. This page says what the tool is for, in plain language. The working formula stays on the signed-in tool.
When to use it
Open Pipe & Annular Capacity when this is the job: Tubing bore and casing-annulus fluid volume from the oilfield capacity factor. That is usually a capacity, displacement, or geometry check from the pipe record.
Step-by-step
- Open Pipe & Annular Capacity from the tool list.
- Fill Unit system, Casing ID, Tubing OD, Tubing ID from the instrument, the drawing, or the job record. Use the unit shown beside each field.
- Fill the remaining fields the same way. Skip a field only when the screen marks it optional.
- Run Calculate when that control is on the page, then read every result row and any warning.
- Check the result against the site procedure and the manufacturer data before you change a range, a wire, a setpoint, or a weight.
- A free account can open this tool after signing in.
Inputs
- Unit system
- Imperial or metric. Pick one and enter every other field in that system.
- Casing ID
- Inside diameter of the casing, from the pipe record or a measurement.
- Tubing OD
- Outside diameter of the tubing.
- Tubing ID
- Inside diameter of the tubing.
- Well depth
- The length you want the capacity for, in the unit shown.
Results
- Result
- The reported value for Pipe & Annular Capacity. Use the unit printed on that row.
- Warnings
- A warning means an entry is incomplete or outside what this tool will stand behind. Recheck the inputs and the site procedure.
Common mistakes
- Using a nominal diameter where the job needs the measured inside diameter.
- Forgetting that the site procedure may require a different method than this field estimate.
- Do not treat a result from Pipe & Annular Capacity as a substitute for the site procedure or the manufacturer data.
Standards references
These are the standards and public references named on this tool. Clause numbers appear only when the catalog already cites them.
- API barrel: 42 US gallons, 231 in³ per gallon (NIST SP 811)
- Oilfield capacity: bbl/ft = ID(in)² / 1029.4
- API Spec 5CT nominals used as defaults (9-5/8 in 53.5 lb/ft casing, 2-7/8 in 6.5 lb/ft tubing)
- ASME B36.10M wall-thickness check thresholds
Offline and access
This engine can run offline after the server has cached it for the signed-in account.
A free account can open this tool in the workspace.