Introduction
ER-Gyro-29 is a compact high-performance MEMS gyro tool directional module designed for harsh downhole environments such as high temperature and strong magnetic interference. It integrates triaxial navigation-grade MEMS gyroscopes and accelerometers with optimized algorithms to continuously output azimuth, inclination, and toolface angle.
Unlike geomagnetic tools, it is completely immune to magnetic interference and maintains reliable accuracy in casing sidetracking, strong magnetic interference sections, and dense well patterns. It offers A/B/C accuracy grades with up to 0.25° azimuth accuracy and a maximum operating temperature of 150°C. Suitable for MWD, well completion, single/multi-shot, north-seeking, and orientation measurements.
Key Features
1. High-Precision Orientation
Azimuth accuracy up to 0.25°, capable of stably outputting azimuth, inclination, and toolface data, providing a high-precision orientation basis for various operation scenarios.
2. High-Temp Design, Stable Operation in Deep Wells
Can continuously and stably operate in a 150°C downhole environment, meeting the needs of medium- and high-temp deep well MWD orientation. Suitable for high-temp deep wells, unconventional shale oil and gas, tight oil and gas, and geothermal directional wells.
3. Completely Immune to Magnetic Interference, Reliable Even When Magnetic Tools Fail
Not affected by magnetic fields. It can maintain stable and reliable measurement accuracy in casing window sidetracking, strong magnetic interference well sections, onshore cluster wells, and offshore platform dense well pattern Santi-collision directional operations.
4. Fast Alignment, Long Holding Time
Alignment time 180 seconds, azimuth accuracy and attitude accuracy holding time both up to 20 minutes, meeting continuous MWD requirements.
5. Compact Structure, Easy Integration
Dimensions 136.8mm × Φ25.4mm, weight ≤300g, suitable for conventional MWD downhole series connection layout, easy to integrate with various MWD systems.
Applications
- Oil and gas directional wells, horizontal wells, extended-reach wells MWD trajectory control
- Casing window sidetracking, strong magnetic interference well sections (conditions where magnetic instruments cannot work normally)
- Onshore cluster wells, offshore platform dense well pattern anti-collision directional operations
- High-temperature deep well MWD, unconventional shale oil and gas, tight oil and gas development
- Geothermal directional wells, deep geological exploration directional drilling
- Horizontal directional drilling (HDD)
Specifications
| Model | ER-Gyro-29AH | ER-Gyro-29BH | ER-Gyro-29CH |
| Azimuth accuracy (1σ,secψ) | 1 | 0.5 | 0.25 |
| Gyro tool face angle accuracy (°,1σ) | 1/secL（L stands for latitude） | ||
| Well inclination alignment accuracy (°,1σ) | 0.1 | ||
| Alignment Time | 180s | ||
| Azimuth maintaining time | 20min | ||
| Attitude maintaining time | 20min | ||
| Azimuth measurement range（°） | 0~360 | ||
| Gravity tool face angle measurement range（°） | -180~180 | ||
| Gyro tool face angle measurement range（°） | 0~360° | ||
| Well inclination measurement range（°） | 0~180 | ||
| Update rate (Hz) | 100 | ||
| Power supply and working environment | |||
| Operating temperature (℃) | +5~+125 | +5~150 | |
| Storage temperature (℃) | 0~+130 | 0~150 | |
| Wide voltage (V) | 6~12V | ||
| Power (W) | 2 | ||
| Communication interface | RS-422 | RS-485 | |
| Appearance characteristics | |||
| Dimension (mm×mm) | 136.8mm x Φ25.4mm | ||
| Weight (g) | ≤300g | ||
Wiring Definition
| Connector Type | PIN | RS422 Definition | RS485 Definition |
| J30J-15ZKP | 1 | +6~12V | +6~12V |
| 3 | GND | GND | |
| 6 | A | TX+ | |
| 7 | B | TX- | |
| 8 | / | RX+ | |
| 9 | / | RX- | |
| 10 | GND | GND |
Overall dimensions
