WHAT DO YOU NEED?
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In a single device the possibility of performing 3 different types of tests!
- Kit CONTACT for sonic and ultrasonic measurements on concrete specimens, walls, stone materials.
- Kit MCHA for checking posts and diaphragms.
- Kit P.I.T for Pile Integrity Test through vibrational methods such as Echo test and admittance
supplies Jack are designed to provide functioning of sparkers of different
types that are used in geophysical surveys on water areas,
"water-land" transition zones and borehole investigations. Releasing
energy of the power supply can reach 5000 J depending on the model (or more on
request). A reliable thyristor key is used in the configuration allowing really
short (60-200 μs) and high-voltage (up to 4 kV) pulses to be produced. The
power supply is charged from electric line 220 V (380 V for 5000HP4,5 version).
The configuration of the device provides power consumption control what allows
the use of it along with compact portable generators (0.8 kW). Pulsed
power supplies Jack can operate in three triggering modes: with an external
control pulse; with a forced start (manual mode) and with repetitive pulses.
There is a special connector at the frame of the device for sync pulse to use
for precise launching the receiver. Power supply Jack is compact, lightweight
(i.e. Jack-2500 weighs only 28 kg) with high-impact waterproof case (Pelicase)
that permits it to be called truly mobile device outstanding from the available
analogues on the market.
Pulse is a borehole sparker that effectively operates with power supply Jack. The latter generates a short high-voltage electric pulse of considerable energy, which ensures the formation of ionized high-pressure gas-vapor cavities on the electrode group of the Pulse sparker, placed in a container with salt water. With explosive expansion of the gas-vapor cavity, the pressure in it rapidly decreases, what leads to a precipitate drop in the temperature, vapor condensation and subsequent collapse of the cavity, what does not lead to parasitic pulsations. The design of the source provides easy replacement of wear electrode groups, what also allows to control the signature of the source by installing a group with a different number of electrodes.
The standard diameters of the containers are 36 / 60 / 80 mm, thus allowing operations in wells with diameters starting from 40 mm. It is important to understand that in order to provide a stable pulse of high energy and a significant operational life of radiating group, a sufficient volume of the container and the amount of electrodes greater than 25 are necessary. The operating life of the radiator is 5000 - 50000 excitations and depends on the number of electrodes and the energy supplied to them.
Pulse sources are shipped on geophysical reels equipped with high-voltage slip rings. Thus, one does not need to disconnect the source from a power supply during operations of winding / unwinding the cable.
The borehole seismic array GStreamer with three-component clamping geophone modules is designed for multiwave crosshole seismic testing. The number of modules on the cable can vary from 1 to 8. The interval between modules is determined by the Customer.
As sensor elements, three normally oriented geophones with a natural frequency of 12.5 Hz are used in each module. The module clamping is achieved by a passive flat spring. Lowering the cable into the borehole is conducted through the load fixed on the end of it.
The use of array with clamping modules along with shear wave source SHock and power supply Jack allows multiwave observations with registration of transverse (S-) waves at distances up to 30 m.
The geophone array can be supplied on a reel with slip ring, which allows to leave the equipment plugged into it while winding and unwinding the cable.
The borehole source SHock is utilized to generate pressure (P-) and shear waves of horizontal polarization (SH-waves) in wells while performing the operations through crosshole seismic testing (CST) and reverse vertical seismic profiling (RVSP) methods. The power supply Jack is used as the source of energy for this device.
The source generates a transverse wave through an asymmetric blow delivered into wall of the well. A rigid pneumo-electric line makes it easy to rotate the source in the borehole, providing generation of "right" and "left" blows. The SHock source allows excitation of seismic signal in both water-filled and dry wells, what is not feasible for borehole sparkers.
The source is supplied on a reel equipped with a high-voltage slip ring. Thus, one does not need to disconnect the power supply during operations of winding / unwinding the cable.
The borehole hydrophone array WellStreamer is designed for receiving longitudinal (P-) waves. The hydrophone modules utilize highly sensitive piezoceramic sensors with preamplifiers. The default number of modules on the cable is 24, but per Customer's request it can vary from 1 to 48. The standard interval between pressure sensors is 1 m and the total length of the seismic array can reach 200 m or more.
The hydrophone array can be supplied on a reel with slip ring, which allows to leave the equipment plugged into it while winding and unwinding the cable.