ER-E1 Gyroscope for Downhole Survey
ER-E1 is with small size and strong shock resistance. It can be used for the system which with small space, was widely used in borehole gyro survey tools and well logging tools. It is designed for dynamical orientation and positioning in the drilling field.
Specifications:
No |
Parameter |
specification |
1 |
Random Drift (1σ) |
≤0.5°/h |
2 |
Drift unrelated with acceleration |
≤100°/h |
3 |
Quadrature acceleration drift rate |
≤15°/h/g |
4 |
Axial mass unbalance drift rate |
≤15°/h/g |
5 |
Drift caused by axial acceleration |
≤10°/h/g |
6 |
The motor power |
exclusive use electrical power supply |
7 |
Annunciator power |
3.5V 8KHz Single phase sine wave power consumption≤1W |
8 |
Torque scale factor |
≤3mA/(°/s) |
9 |
Linearity |
≤0.2%(F.S) |
10 |
Measuring range |
±270°/s |
11 |
Cross coupling error |
≤0.2% |
12 |
Convergence time of open loop oscillation |
1.5s~2.5s |
13 |
Operating temperature |
-55℃~+85℃ |
14 |
Vibration power spectral density |
0.16g2/Hz |
15 |
Shock |
200g |
16 |
Dimension |
Φ21.8×18 mm Flange:22×22 mm |
17 |
Weight |
≤45g |
ER-E2 Gyroscope for dynamic well logging
ER-E2 is specially designed for borehole drilling field which has overcame the following technical difficulties, especially its operating temperature up to 100 degree centigrade. Inertial devices are more adaptable and better applied in the drilling field than they are in aviation field due to its ability of working in poor conditions. The life of DTG and its adaptation in temperature are specified, especially when it was used in higher temperature.
Specifications:
N0. |
Item |
Specification |
|
1 |
Performance Parameter |
Random Drift (1σ) |
0.3°/h |
Drift Stability (1σ) |
≤0.2°/h |
||
g-independent |
≤20°/h |
||
g-dependent |
≤3°/h |
||
Frequency Response |
≥60 Hz |
||
2 |
Technological parameter |
Power Supply(Three Phase) |
400 Hz |
12 V | |||
Power Supply(Single Phase) |
16 KHz |
||
7 V | |||
Synchronous Speed |
12,000 |
||
Power for Start Up |
4 W |
||
Operating Current |
≤0.18 A |
||
Synchronizing Time |
≤10 S |
||
Output Gradient |
14 mv/’ |
||
Master torquer |
7Ω |
||
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