The Subsurface Legal Metrology Instrument for Certified Compliance
Increasingly, subsurface activities are governed by stringent regulations requiring demonstrably accurate well placement, spacing, and containment. Surveys for these purposes must meet a legal standard of proof. The JTG-1 and GDY-2GW systems are engineered to fulfill the role of Subsurface Legal Metrology Instruments. This classification means they are designed not just for field utility but to produce measurement results that are fit for legal and regulatory scrutiny. They achieve this through traceable calibration to national or international standards, documented and repeatable measurement procedures, and the generation of tamper-evident, auditable data records. The use of a high-accuracy, interference-immune gyro is paramount, as it provides a defensible measurement methodology that can be proven independent of the variable site-specific conditions (like casing) that undermine the credibility of alternative tools.
The operation of these instruments is governed by a formalized quality assurance protocol. Each unit is supplied with a unique calibration certificate documenting its performance against known standards, establishing metrological traceability. The automated measurement cycle and data logging remove subjective operator influence from the data collection process, a key requirement for auditability. Data outputs include timestamps, device identifiers, and raw sensor readings alongside calculated results, creating a complete chain of evidence. The instruments are designed for periodic re-verification and recertification, ensuring their measurements remain legally valid throughout their service life. This rigorous approach transforms a field survey into a forensically sound documentation process suitable for submission to regulatory bodies, courts, or partners in a joint venture.
The necessity for legal-grade metrology is driven by high-stakes compliance requirements. In subsurface storage (CO2, hydrogen, natural gas), regulators require incontrovertible proof that injection wells are placed correctly and that stored fluids remain within the authorized geological complex; this system provides the certified directional surveys to meet that burden of proof. In urban drilling or multi-operator fields, precise legal well spacing is critical to avoid trespass and resource disputes; these instruments deliver the auditable survey data to definitively establish well location. They protect operators from liability and enable permitting for sensitive projects by providing the highest standard of measurement evidence. By employing a dedicated legal metrology instrument, organizations proactively build an indefensible factual record for their subsurface activities, safeguarding their social license to operate and their legal standing.
Technical Specifications: Subsurface Legal Metrology Instrument
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