DOWNHOLE
DW-150
DW-150 “Slimhole Array System
PRODUCT DETAILS
Miniaturized Multi-Component Borehole Sonde String
The DW-150 is a miniaturized, multi-component borehole sonde string utilizing an ultra low-noise digitizer, which enables the recording of low-amplitude microseismic events, 3D-VSP, and crosswell seismic imaging.
FEATURES
- 24-bit x three-channel digitizer in each shuttle.
- Ultra low-noise digitizer enables recording of low-amplitude microseismic events, 3D-VSP, Crosswell Seismic Imaging, etc.
- Slim-hole sonde 1.6 inch OD (<41 mm).
- 3C sensor packages available: 3C tri-axis orthogonal Geophone.
- OMNI-2400 high-output Geophone sensors.
- Machined stainless housing minimizes mechanical resonance for high-resolution, high-frequency recording.
- Direct connection sub-arrays, armored wireline, or rigid interconnects available with high-pressure multi-conductor booted connectors.
- Flexible or rigid interconnects may be connected “back-to-back” to form longer intervals.
- Maximum distance between sonde modules: 100 meters.
- Maximum temperature rating: 150°C.
- Maximum pressure rating: 20,000 psi.
- Configurations for vertical, deviated, or horizontal wellbore deployments.
- Adaptable housing for user-defined, application-specific coupling devices.
MECHNICAL SPECIFICATIONS
| Outside Diameter | 1.6 inches | < 40.64 mm |
| Length | 16 inches | 406.4 mm |
| Tool Weight | 5 lbs. | 2.27 kg |
| Anchoring System | Mechanical on each shuttle (bow spring/magnetic) | Tubing mandrel Permanent (cemented) |
| Anchor-to-Weight ratio | 7:1 (passive spring) | |
| Tool Anchoring Range | Custom adapters for dimension ranges | Sizes available upon request |
| Points of Contact | 5 points, including oposing clamp axis | |
| Sensor Package | 3C w/OMNI-2400, mutually orthogonal sensor set standard 2.26 Volts/inch/second Sensitivity |
|
| Interconnect Options | Rigid Tubing | Flexible Armored Wireline Cable |
| Standard Lengths | 3, 6, 9, 9, 12, 15, 20 meters | |
| Maximum Temperature | 302°F | 150°C |
| Maximum Pressure | 20,000 psi |
DIGITAL MODULE 3-CH X 24-BIT DIGITIZER SPECIFICATIONS
| Sampling Rates | ¼, ½, 1, 2, and 4 ms |
| Pre-amplifier Gains | 0dB 6 dB 12 dB 18 dB 24 dB 30 dB 36 dB |
| Equivalent Input Noise @2ms | 1.13μV rms 0.58 μV rms 0.33 μV rms 0.22 μV rms 0.19 μV rms 0.18 μV rms 0.17 μV rms |
| Maximum Input Signal | 1.8 V rms 0.9 Vrms 0.45 Vrms 0.225 Vrms 0.1125 Vrms 0.0562 Vrms 0.0281 Vrms |
| Gain Accuracy | < 1% |
| Frequency Response | 3 to 1.65 KHz |
| Anti-alias Filter | 83% Nyquist |
| Instant. Dynamic Range @2ms | 124 dB |
| Cross-feed Isolation | >90 dB |
| THD | 0.001% |
| System Timing Accuracy | Better than 1 PPM |
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