Directional Drilling Services
Logging While Drilling (LWD)
The Orienteer Gamma Ray LWD tool uses wireline standard measurement technology in a specially ruggedised assembly to provide an accurate gamma-ray log while drilling and this tool can be attached to the directional tool string below the Survey Electronic Assembly to measure the natural gamma radiation from the formation as drilling progresses. The patented scintillation detector design has been developed to withstand the high levels of shock and vibration which the tool assembly is subjected to during drilling and provides a rugged and reliable measurement. The tools are calibrated to API standards and the gamma ray data can be presented in API units.
The Sondex Drilling Gamma Sensor utilises a scintillation counter (NaI Crystal) and a photomultiplier mounted within a specially designed package which provides protection against the high levels of shock and vibration encountered in the drilling environment. The sensor is mounted in the LWD string as part of the Modular Gamma Ray Assembly (MGRA), capable of transmitting real-time formation gamma-ray information to surface for correlation and geo-steering purposes. It also stores high-resolution data downhole for later, memory-log download at surface. The MGRA is calibrated against the API standard so that the log can be compared directly with wireline gamma logs. Geolink Navigator surface software automatically corrects the signal for the attenuating effects of the drill collar and tool housing.
The LWD tool has the following features:
- Calibrated to the API Standard - directly comparable to wireline logs.
- AAPI Log Scale - Facilitates correlation and geo-steering.
- Ruggedized Design - Highly reliable.
- Sondex Drilling division proprietary technology, manufactured in UK.
- Geolink Navigator surface software provides user friendly interface.
- Slim hole sizes available.
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Logging While Drilling (LWD)
