Downhole S-Wave sparker source
IPG5000 | Impulse Generator
The Impulse Generator IPG5000 (formerly named IPG1005) is the high voltage supply to the seismic borehole sources BIS-SH and SBS42. The energy is stored in a large capacitor bank which discharges through a mechanical switch.
The IPG5000 is controlled by a Remote Control Unit (RCU). The RCU allows the user to start the seismic survey by a single or continuous shot release. The repetition rate is freely selectable under continuous operation. The RCU is connected to the seismograph to send an accurate trigger signal.
BIS-SH | Downhole S-Wave Sparker Source
The borehole source BIS-SH generates horizontally polarized shear waves (SH) and compressional waves (P). The seismic signals are highly repeatable. The source works in dry or water filled boreholes and can be used in vertical or horizontal boreholes.
Energy released by the IPG5000 discharges through a system of electromagnetical coils adjacent to a copper plate. If the plate is rejected a mechanical impact to the borehole wall is generated. The borehole source is coupled to the borehole wall by a pneumatic clamping system (inflatable bladder). The orientation of the source is controlled from surface by a torsionally stiff hose.
Description
IPG5000
Impulse voltage : 5000 V.
Impulse energy : 1000 J.
Power supply : 230 V/110 V.
Shot release : Single or continuous.
Repetition rate : 8 s (or freely selectable between 3 and 8 s).
Dimensions : 52 x 32 x 53 cm.
Weight : 60 kg.
Special features : Impulse counter, test trigger, emergency OFF button, intern/extern operation.
RCU : Single or continuous shot release, impulse counter, test trigger, trigger output, emergency OFF button.
Manufacturer: Geotomographie (Germany).
BIS-SH source
Frequency: up to 4 kHz.
Cable length: 65m, up to 100m.
Diameter: 65mm.
Probe length: 880 mm.
