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Coriolis-based well pad metering that measures oil, water, gas, temperature, and pressure in a single non-special-equipment skid — no pressure vessel certification required.
Production allocation metering has been dominated by two expensive extremes for decades: the three-phase test separator (large, heavy, pressure-vessel certified, requiring level controls, weirs, and regular calibration) and the well-testing truck (mobile but temporary, labor-intensive, and impractical for continuous per-well allocation). The Jingtao Energy Combined Multifunctional Measuring Device breaks this trade-off. Built around a Coriolis mass flow meter at its core, the skid integrates a gas-liquid cylindrical cyclone (GLCC) for phase separation, a Coriolis meter for liquid mass flow and water cut (via density differential), a vortex or ultrasonic meter for the gas leg, plus temperature and pressure transmitters — all on a single compact skid. Crucially, the entire assembly operates at wellhead pressure and qualifies as non-special-equipment under China’s Special Equipment Safety Law (no pressure vessel registration, no annual vessel inspection). This means fast deployment, lower capex, and elimination of recurring pressure-vessel certification costs. The onboard controller computes net oil, net water, and net gas rates at standard conditions in real time, with Modbus output to any SCADA or RTU system. A built in CO₂ sensor option enables emissions tracking for ESG reporting and carbon-market compliance.
The device uses a two-stage measurement architecture that eliminates the large three-phase separator vessel while maintaining allocation-grade accuracy:
Stage 1 — Gas-Liquid Separation (GLCC): Wellhead production fluid enters a compact gas-liquid cylindrical cyclone. Centrifugal action separates the bulk gas from the liquid stream in under 2 seconds of residence time. The gas exits through the top leg and passes through a demister before metering. The liquid exits through the bottom leg to the Coriolis meter. Because the GLCC operates at line pressure with minimal liquid holdup, it does not qualify as a pressure vessel under the 150 L volume threshold in most jurisdictions.
Stage 2 — Coriolis Liquid Measurement: The separated liquid stream passes through a Coriolis meter that directly measures mass flow rate and fluid density simultaneously. Water cut is calculated from the density differential between pure oil and pure water (operator enters oil and water densities at line conditions during commissioning). Because Coriolis meters measure mass directly — not inferred from differential pressure — The measurement is independent of fluid viscosity, flow regime, or entrained solids.
Stage 3 — Gas Metering + Compensation: The gas leg passes through a vortex or ultrasonic meter, with real time temperature and pressure compensation converting actual volumetric flow to standard conditions (Nm³). The onboard PLC aggregates all streams and outputs net oil, net water, and net gas rates via Modbus.
| Feature | Three-Phase Test Separator | Well Testing Truck | Jingtao Combined Metering |
|---|---|---|---|
| Footprint | Large — 6–12 m vessel + foundation | Mobile — requires road access | Compact — 2.0 × 1.2 m skid |
| Regulatory Classification | Pressure vessel — mandatory annual inspection | Pressure vessel — same requirements | Non-special-equipment — exempt from periodic inspection |
| Continuous Operation | Yes — permanent installation | No — temporary, per-campaign | Yes — permanent, 24/7 per-well allocation |
| Deployment Time | Weeks — civil works, lifting, piping | Hours — drive to location | Days — skid placement + flange connection |
| CO₂ Tracking | Not available | Not available | Built-in — NDIR sensor for per-well carbon accounting |
| Capex (Relative) | High — vessel + foundation + piping + certification | Medium — truck-mounted unit | Competitive — compact skid, no certification burden |
Measurement accuracy figures per OIML R 137-1&2:2014 type-approval testing. Multiphase flow loop validation conducted at China National Petroleum Corp. metering laboratory.
Production metering requirements vary with GOR, water cut, flow rate, and regulatory classification needs. Our engineers will review your well parameters and deliver a custom technical proposal with a meter sizing calculation, accuracy prediction, skid layout, regulatory-classification assessment for your jurisdiction, and a capex/opex comparison against your current metering solution — within 48 hours.
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