MEMS Gyro Directional Module(Can replace fluxgate directional module)
Introduction
ER-Gyro-19 uses an electrical interface and mechanical structure compatible with the fluxgate orientation module. It can be directly replaced in situ without modifying the hardware architecture of the probe or logging equipment, greatly reducing the equipment modification cost and installation complexity.
Traditional magnetic sensitive element inclinometers cannot guarantee the azimuth measurement accuracy in casing, tubing, drill pipe and well sections affected by magnetic interference. For such abnormal magnetic field environments, gyro orientation technology based on the earth's rotation angular velocity sensing is required.
ER-Gyro-19 is equipped with a high-precision MEMS gyroscope with self-seeking function. By integrating the real-time data of the three-axis MEMS gyroscope and the three-axis accelerometer, it can perform high-precision tracking and holding measurements of azimuth, well inclination and tool face angle in real time under large random vibration conditions, which is especially suitable for measurement while drilling scenarios.
The azimuth and tool face angle can be output normally at small well inclination, with the accuracy kept within 3°, which solves the technical defect that most gyro logging tools cannot output effective azimuth at small well inclination.
The device supports measurement while drilling, point measurement and continuous measurement, can quickly collect drilling data, control drilling trajectory, greatly shorten measurement time, and significantly improve operation efficiency. It is an ideal equipment in the fields of oil and gas logging.
Features
- Adopt the latest three-axis MEMS gyro, three-axis MEMS accelerometer strapdown inertial measurement technology, replace the fluxgate sensor in situ;
- The azimuth and tool face angle can be output normally at small well inclination, with the accuracy kept within 3°;
- Subverting the size of traditional gyro tools, extremely small, width 19mm, length 136.8mm, which can be easily embedded in narrow front-end spaces such as probes;
- All-solid-state design, excellent impact and vibration resistance
- Dynamically maintain the accuracy of azimuth, well inclination and tool face angle under vibration environment (random);
- 30s fast alignment, azimuth accuracy 1°, 90s precise alignment, azimuth accuracy 0.5°;
- The well inclination measurement angle is up to 0.1°; the gyro tool face angle accuracy can reach 1°/secL (L represents latitude);
- It can measure while drilling and can also measure continuously;
- Not affected by magnetic field, with self-seeking north function;
- 5~125°C full temperature calibration compensation, adapt to extreme environments;
Applications
1) North-seeking logging tools/gyroscopes;
2) Pointing and guidance of advanced mining/drilling equipment;
3) Oil inclination north-seeking;
4) Pipeline measurement.
Figure 1. ER-Gyro-19 gyro tool orientation module coordinate polarity definition (top view)
Performance parameters
Model | ER-Gyro-19 | ER-Gyro-19H | ||
Performance Indicators | Parameter | |||
Azimuth accuracy(1σ,°secψ) | 1 | 0.5 | 1 | 0.5 |
Gyro tool face angle accuracy(°,1σ) | 1/secL(L stands for latitude) | 1/secL(L stands for latitude) | ||
Well inclination alignment accuracy(°,1σ) | 0.1 | 0.1 | ||
Azimuth hold accuracy | 20min | 20min | ||
Attitude maintenance accuracy | 20min | 20min | ||
Azimuth measurement range(°) | 0~360 | 0~360 | ||
Gravity tool face angle measurement range(°) | -180~180 | -180~180 | ||
Gyro tool face angle measurement range(°) | 0~360° | 0~360° | ||
Well inclination measurement range(°) | 0~180 | 0~180 | ||
Update rate (Hz) | 100 | 100 | ||
Power supply and working environment | ||||
Operating temperature(℃) | 5~+85 | 5~125 | ||
Storage temperature (℃) | 0~+90 | 0~130 | ||
Wide voltage (V) | 6~12V | |||
Power (W) | 2 | 3 | ||
Communication interface | RS-422 | |||
Appearance characteristics | ||||
Size (mm×mm) | 136.8mm x 20.3mm x 19mm | |||
Weight (g) | ≤150g |
Wiring Definition
Connector Model | Pinout | Definition |
J30J-15ZKP | 1 | +6~12V |
3 | GND | |
6 | Tx+ | |
7 | Tx- | |
8 | Rx+ | |
9 | Rx- | |
10 | GND |
Dimension
Application Techniques
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