Enter the stack
Annular, rams, and hydraulic valves with their close and open volumes and closing ratios.
Solution 01 / Well control
16D BOP
calculation.
Check that a BOP control unit can close the stack it serves. Describe the preventers and the accumulator bottles in familiar units, and get a clear result benchmarked against API Annex 16D references. This page is intentionally concise while the product details are finalized.
Review offering
Product spec in progress
How the 16D check worksClick a step or the highlighted equipment
API 16D
Mast & hoisting
Choke manifold
Step 1 of 3 · Describe the BOP
Start with the BOP stack you actually have.
List each preventer on the stack, the annular and every ram, with the hydraulic fluid it takes to close and open, and the pressure it needs to close against the well.
You enter
- Annular and ram preventers
- Close / open volumes (gal)
- Closing ratios
- Choke and kill valves
Step 2 of 3 · Describe the control unit
Add the accumulator unit that closes it.
The control unit stores hydraulic fluid in nitrogen-charged bottles. As fluid is used, pressure drops, so bottle size and pressures decide how much of the stack the unit can close.
You enter
- Bottle count and size
- Nitrogen precharge
- System and minimum operating pressure
Step 3 of 3 · Run the API 16D check
Can the unit close the BOP when it counts?
RigLogicOS works out the usable fluid in the bottles, runs the functions API 16D requires, and confirms pressure stays above the minimum operating pressure.
You get
- Usable fluid volume
- Margin against the requirement
- Pass / fail with references
Covered by the 16D check
On the roadmap
Example values for illustration
The offering
A dedicated calculation path for BOP engineering.
RigLogicOS currently has one solution: a 16D BOP calculation. It is built for drilling and well-control engineers who need a faster, repeatable way to size and check BOP control systems, using the volumes and pressures they already work with.
The final production page can later replace these overview notes with the exact inputs, validation rules, benchmark evidence, and commercial details.
API Annex 16D benchmarkPositioned around API Annex 16D reference checks and benchmarked calculation behavior.
BOP-focused inputsPreventers, closing volumes and ratios, accumulator bottles, and operating pressures.
Clear calculation resultUsable fluid, margin, and pass / fail, laid out for engineering review.
Expandable product pageCopy is intentionally light so the final product specification can be added later.
How it works
From BOP inputs to benchmarked result.
Four steps, in the gallons and psi engineers already use.
Add the control unit
Accumulator bottles, nitrogen precharge, system pressure, and minimum operating pressure.
Run the 16D check
Usable fluid is calculated and checked against what the stack's functions require.
Use the result
Pass / fail, margin, and the references behind each number, ready for review.
Example output
A result engineers can read at a glance.
Inputs and results stay in familiar units. Values shown are illustrative; the final input list, validation rules, and report format will follow the product specification.
Example calculationIllustrative values
Surface BOP control unit
Inputs
- Accumulator bottles
- 10 × 15 gal
- Nitrogen precharge
- 1,000 psi
- System pressure
- 3,000 psi
- Minimum operating pressure
- 1,200 psi
- Fluid required by BOP functions
- 60.0 gal
Result
Pass · 15.0 gal marginPressure after closing: 1,364 psi, above the 1,200 psi minimum
Product note: required inputs, units, validation rules, supported standards editions, benchmark methodology, result fields, and availability should be updated here once the product is finalized.