Geode, BHG-2/BHG-3 다운홀 시스템 Geostuff Wall-Lock Borehole Geophones
- 탐사기기, 다운홀 지오폰, 컨트롤러
- 48 mm 직경
- Automatic orientation 기능 보유
- 다운홀 X-Y-Z 방향의 3성분 지오폰 포함 된 다운홀 전용 수신기
- BHG-3의 경우 Compass(모든 방위각에 대한 수평 지오폰의 자동 방향) 기능 보유
Information
| Number of geophones | 1 vertical and 2 horizontal in an X-Y-Z configuration |
|---|---|
| Natural Frequency | 15-Hz high-output omnidirectional is standard; 10, 28 and 40 Hz optional |
| Pressure rating | 300 meters (1000 ft) water depth, consult factory for deeper options |
| Clamp mechanism | DC motor. Requires 24 volts DC on surface (or more, depending on cable length). Requires ½ amp when moving spring (1 amp peak at clamping) |
| Expanded diameter | 18 cm (7 in) total diameter including probe body. |
| BHG-2 Borehole Geophone | Diameter: 48 mm (1.9 in) Length: 700 mm (27.5 in) Weight: 2 kg (4 lb) |
| BHG-3 Borehole Geophone | Diameter: 48 mm (1.9 in) Length: 1.1 m (44 in) Weight: 3.4 kg (7 lb) |
| Compass | fluxgate sensor, powered from same DC voltage as clamp mechanism. The flux gate compass will not function in steel-cased boreholes. |
| Maximum inclination | +/- 90 degrees from vertical with standard 15-Hz sensors, much less with optional sensors. |
| Orientation Accuracy | better than 5 degrees |
| Cable | 7-conductor, with two copper and 5 copperweld conductors, Kevlar-reinforced, polyurethane-jacket cable, with Reed Products SU-8 female connector molded on wet end. |
