RU2714046C1 - Universal non-explosive pulsed electrodynamic seismic vibrator for transit zones - Google Patents

Abstract

FIELD: device for generation of seismic energy.

SUBSTANCE: invention relates to devices for generation of seismic energy. Device comprises sealed housing (11) with bottom made from steel, made with possibility of arrangement of suspended float system. Inside housing (11) there is rigid plate-emitter (1) of seismic waves. On upper surface of emitting plate (1) there are first excitation coils (2) made in form of copper spiral. On plate-emitter (1) there are insulating plates (3), in groove on lower surface of which there are adjacent to first excitation coils (2) second excitation coils (4). Outputs of second excitation coils (4) are connected to unit (5) of storage capacitors and their charging device, as well as to electronic control cabinet. On each insulating plate (3) there is balance weight (6) with linear bearing (7), which is made with possibility of movement along guide tube (8) installed on plate-emitter (1). Inside guide tube (8) there is damper (9).

EFFECT: high reliability of the seismic vibrator during operation in difficult climatic conditions and broader capabilities of performing seismic operations.

1 cl, 1 dwg

Description

The invention relates to non-explosive pulsed ground-based seismic sources used in seismic exploration, creating seismic waves in the soil through its deformation.

A known seismic source for pulsed creation of seismic waves in water areas (patent for the invention of the Russian Federation No. 2246741, publ. 02/20/2005), containing a partially submerged craft, elastic elements, a load and a source of linear mechanical force, the first movable part of which is attached to the load, characterized in that a hole is made in the bottom of the boat, along the perimeter of which a body is attached to the bottom, which can be part of the boat, the second movable part of the said power source is connected to the projectile-radiation the body, which is located above the hole and partially immersed in water, the hammer through elastic elements is connected to the load, and the load is supported on the body, or the hammer through the elastic elements is connected to the body, and the load is supported on the hammer or body; the drummer has the ability to move down, the load has the ability to move up; a volumetric elastic element, a receiver, is placed in water under the drummer, made with the possibility of partial reduction of its volume with increasing pressure in the surrounding water. The disadvantages of such a device include a limited scope. This source is designed to operate only on water and cannot work in wetlands and transit zones where water alternates with hard surface and vegetation.

Known non-explosive pulsed ground-based seismic source (patent for the invention of the Russian Federation No. 2522143, publ. 07/10/2014), containing a rigid plate-emitter, loading mass (load), damper and induction-dynamic motor, placed between the load and the plate with the possibility of creating between pulsed force, characterized in that on the plate with its lower part is supported by a rigid protective casing, inside of which a load, a damper and an engine are placed with the possibility of moving the load inside the casing, which is connected to the plate by means of a cuff teacher with the possibility of displacement of the plate relative to the casing at a distance of not less than the deformation of the soil by the plate. The disadvantage of this device is the leaky housing, which does not allow working in conditions of high humidity (marshy areas, transit zones). The lack of buoyancy does not allow the use of this source on water, which limits the scope.

Known pulsed non-explosive seismic source with an electromagnetic drive (patent for the invention of the Russian Federation No. 2555213, publ. 07/10/2015), containing a rigid plate - an emitter of seismic waves, a load, dampers, an electrical power system, consisting of a charger and a capacitor battery, and an electromechanical a converter, characterized in that the emitter is made in the form of a hollow box with a flat bottom, a variable mass load is placed inside the box in the center, a charger is placed inside the box on different sides of the load in and a capacitor bank, an electromechanical converter is made in the form of a short-stroke pulse electric motor, consisting of an armature and an inductor, which are integral with the load, with grooves on the side facing the armature, in which the excitation coil is placed, plates with the possibility of regulation are placed between the armature and the inductor working gap between the armature and the inductor, the charger with a capacitor bank is connected by a power cable to the excitation coil.

The problem to which the invention is directed, is to create a pulsed seismic source with high performance indicators and advanced features of its use in remote areas and in difficult climatic conditions.

The technical result is to increase the reliability of the seismic source when operating in difficult climatic conditions and expand the capabilities of seismic surveys.

The specified technical result is achieved due to the fact that the pulse non-explosive seismic source contains a sealed housing with a bottom made of steel, inside of which there is a rigid plate-emitter of seismic waves, on the upper surface of which are placed the first excitation coils made in the form of a spiral made of copper, while on the plate the emitter is supported by insulating plates, in the groove on the lower surface of which are placed second excitation coils adjacent to the first excitation coils, the terminals of which are connected They are equipped with a storage capacitor unit and their charger, and an electronic control cabinet, and on each plate a load is installed with a linear bearing with the ability to move the load along the guide pipe installed on the emitter plate, while the damper is placed inside the pipe, and the housing is arranged to accommodate on it a hinged float system.

The invention is illustrated in the drawing, which shows a longitudinal section of a seismic source and the positions indicated:

1 - plate emitter

2 - the first excitation coil,

3 - insulating plates,

4 - the second excitation coil,

5 - block storage capacitors,

6 - load

7 - linear bearing

8 - guide tube,

9 - damper,

10 - cable entry

11 - case.

A pulse non-explosive seismic source with an electromagnetic drive contains a sealed housing with a bottom made of steel, inside of which there is a rigid plate-emitter of seismic waves (1), on the upper surface of which the first excitation coils (2) are mounted, made in the form of a copper spiral. Insulation plates (3) are supported on the plate (1), in the groove on the lower surface of which are placed second excitation coils (4) adjacent to the first excitation coils (2), the terminals of which are connected to the storage capacitor unit (5) and their charging device and electronic cabinet control (not shown in the figure). Each plate (3) has a load (6) with a linear bearing (7) with the ability to move the load (6) along the guide tube (8) installed on the base (1). Inside the pipe (8), a damper (9) is placed. The power supply to the block of storage capacitors (5) is carried out via a cable through a cable gland through passage (10) on a sealed enclosure (11). The body of the seismic source is configured to attach a mounted float system to it.

The device operates as follows.

When the capacitor bank (6) is connected to the control cabinet, through the charger, energy is accumulated in the winding of the second excitation coils (4) to form a powerful current pulse. After charging the capacitor bank to the required power, on command from the control cabinet, electric energy is supplied to the second excitation coils. When the magnetic field of the second excitation coils (4) interacts with the magnetic field of the first excitation coils (2), electromagnetic energy is converted into mechanical energy, which is realized as a pulse of force from the emitter plate (1) with a flat bottom of the body on the ground. The pulse power can be controlled by the amount of charge on the capacitor bank using the control cabinet.

 Using a sealed enclosure with a bottom made of special steel allows you to work in almost any environment (water, swamp, transit zones, coastal vegetation, areas with high abrasiveness of the soil). The use of a hinged float system allows the sources to work in conditions of both shallow water and water bodies with considerable depth. During testing, the source shows stable operation afloat at a depth of 5-8 meters.

The use of paired coils significantly increases the efficiency of the device, which reduces the charge voltage of the capacitor bank, and, therefore, reduce the time the source is ready for the next pulse. The presence of paired coils also allows you to increase the magnetic field in the working area, which in turn increases the power of the source as a whole.

Claims (1)

A pulsed non-explosive seismic source containing a sealed housing with a bottom made of steel, inside of which there is a rigid plate-emitter of seismic waves, on the upper surface of which are placed the first excitation coils made in the form of a spiral made of copper, while insulation plates are supported on the emitter plate, in the groove on the lower surface of which are placed second excitation coils adjacent to the first excitation coils, the terminals of which are connected to the storage capacitor unit and their charging device By means of the device and an electronic control cabinet, a load with a linear bearing is installed on each plate with the ability to move the load along the guide pipe installed on the emitter plate, while a damper is placed inside the pipe, and the housing is designed to accommodate a mounted float system on it.

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