APIs › Petroleum Engineering Calculators › Hydrostatic Pressure

Hydrostatic Pressure

Hydrostatic pressure from fluid density and true vertical depth in field or SI units, with the gradient returned.

POST /v1/petroleum/hydrostatic-pressure $0.01 per call

Specification

Endpoint

POST /v1/petroleum/hydrostatic-pressure

Price

$0.01 per call · tier standard_data

Payment

x402 on X Layer (chain 196) · settled in USDG or USDT0 · scheme exact

Data source

Published petroleum-engineering correlations, cited per endpoint

Timeout

15 seconds

Max request

64 KB

Version

1.0.0

Calling it

The first call returns a 402 with the payment challenge. Retry with a signed authorisation in the X-PAYMENT header — see the payment guide for the exact shape.

curl -i -X POST "https://api.dana-edu.pp.ua/v1/petroleum/hydrostatic-pressure" \
  -H "content-type: application/json" \
  -d '{ ... }'

Response

Real output, captured by running this endpoint at build time — not written by hand. Volatile fields such as timestamps are elided. Captured 2026-07-30.

{
  "hydrostatic_pressure_psi": 4368,
  "hydrostatic_pressure_pa": 30116299.9,
  "hydrostatic_pressure_bar": 301.163,
  "pressure_gradient_psi_ft": 0.546,
  "pressure_gradient_kpa_m": 12.3385,
  "surface_pressure_psi": 0,
  "total_pressure_psi": 4368,
  "equivalent_density_kg_m3": 1258.18,
  "true_vertical_depth_m": 2438.4,
  "formula": "P = 0.052 × MW(ppg) × TVD(ft)",
  "reference": "Standard drilling-engineering relation. The field constant 0.052 is the 1/19.25 gal·ft/(lb·in²) unit conversion, not an empirical fit.",
  "note": "Screening-level engineering result. It does not replace a commercial simulator, a laboratory PVT measurement, or review by a qualified engineer. True vertical depth must be used, not measured depth along the hole."
}

Every response is wrapped in the same envelope: data plus warnings, sources, confidence, informational_only and a measured processing_ms. See the envelope reference.

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