MicroTesla has modified the standard MDS directional instrument and the standard MSM steering module so that the magnetic resolution is improved by 400%.
When used in conjunction with the True-Gyde software the high-senditivity wireline steering system can detect Utility or River Crossing coil magnetic fields much farther away than was previously possible. For example, the old system had a tool resolution of 16 nT and now the tool resolution is less than 2 nT. Requires a True-Gyde software license.
Conversely, since the tool resolution is improved and the sensitivity to magnetic gradients has been drastically increased, much smaller coil wire can be used for the tracking coil and a much smaller power supply can be used to drive the coil wires.
Physical
Length: 32.4” with pupDiameter: 1.375”Proprietary MFE fluxgate magnetometerQuartz flexure accelerometer or SiFlex2 MEMS accelerometerCompatible with the existing QDT system
Electrical
Through-hole boards with SYLGARD encapsulationOperating voltage range: ±12V to ±15VPower usage nominal: 1.2W peakDigital interfaces: serial FSKCalibration coefficient downloaded directly into digital interface serial memorySwitching circuitry provides sensor power control
Environmental
All boards qualified for high-temp applications, 175°CQ-Flex accelerometers, 175°C, SiFlex2 accelerometers, 125°CMagnetometers, 210°C.
Mechanical and Environmental Specifications
| Parameter | Minimum | Maximum | Units |
|---|---|---|---|
| Outside Diameter* | 1.375 3.5 |
inches cm |
|
| Length* | 29 73.6 |
inches cm |
|
| Operating Temperature | 0 + 32 |
125 257 |
°C °F |
| Survival Temperature | – 40 – 40 |
150 302 |
°C °F |
| Vibration, Random* | 20 | g RMS, 15-500 Hz | |
| Shock* | 1000 | g;½ msec and ½ sine |
* Limited by accelerometers
Instrument Accuracy Specifications
| Parameter | Minimum | Units |
|---|---|---|
| Inclination accuracy, absolute* | ± 0.10 | degrees |
| Inclination spread on axial rotation at 90° Inc | < 0.10 | degrees |
| Azimuth accuracy, absolute, 90° Inc | ± 0.5 | degrees |
| Azimuth spread axial rotation, 10° through 90° | < 0.50 | degrees |
| Total face accuracy, axial rotation 10° through 90° Inc | ± 1.0 | degrees |
| Total g field accuracy, absolute | ± 2.0 | mG |
| Total H field accuracy, sensitivity | ± 1.5 | nT |
| Magnetic dip accuracy | ± 0.4 | degrees |