Annulus
Products

Seven products. One engine.

Start with Gain. The others switch on from the same engine: boundary observers on the drillstring–annulus U-tube; unknown-input estimation by a signature bank and constrained moving-horizon least squares.

Gain

Influx rate. With an interval.

Influx and loss rate from pump strokes, standpipe pressure, flow-out, pit and trip tank, with an interval.

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Balloon

Kick or ballooning.

The look-alikes, weighed over time: influx, ballooning, connection, pump ramp, sensor fault, or unexplained.

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Limit

Smallest influx it can see.

The minimum detectable volume per hole section, at the frozen false-flow-check rate: 1 per 100 rig-hours.

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Check

Flow checks that were worth it.

False flow checks per 100 rig-hours against detection volume: the trade-off, made visible.

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Mode

Which rig state we are in.

Drilling, connection, tripping, circulating: classified from the channels, so each state has its own baseline.

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Rehearse

The drill, on your well.

Kick, loss and shut-in drills on a simulator of the crew's own well, scored on detection volume and response time.

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Sequence

Shut-in and kill, checked.

The shut-in and kill sequence as a checked contract, dry-run, never executed.

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Products · Annulus