SU124648A1 - The method of deep shock excitation of transverse seismic waves and a device for implementing this method - Google Patents

Description

The known methods and devices intended for the purpose of the shock excitation of transverse seismic waves are very primitive and are reduced to "manual or mechanical shocks on the surface of the ground.

Impact excitation of transverse seismic waves at depth has a number of advantages over excitation of them on the soil surface, since more favorable conditions are obtained for recording the frequency spectrum.

The described wellbore percussion device is the first deep source of shear waves.

In the proposed method, the excitation source of the waves from the surface to the depth is carried out with the aid of a projectile lowered into the borehole, and the excitation of the waves is carried out directly in the borehole at various depths below its mouth on the rock of the borehole wall. The device for carrying out this method is made in the form of a mechanical exciter consisting of a metal body equipped with a coil spring, a striker and a hammer and mounted in the shape of a borehole head lowered into the well on metal wells, and for controlling the orientation of the exciter with the cocking and lowering shock spring applied rods, laid VNZ-three rods.

The drawing shows a percussion downhole device in the well. In the well; with a diameter of 100-140 mm, a downhole projectile 2 is lowered, consisting of body 3, impact head 4 and casing 5. In the steel case of the impact head, a percussion mechanism, cocking mechanism and descent mechanism are placed. The percussion mechanism is t No. 124648-2 -

yellow firing pin placed in the cylindrical channel of the body, which is pressed by the rigid coil spring against the hammer 6, which closes the cylindrical channel and fixed to the body with a rubber shock absorber. The platoon mechanism consists of two platoon combs, a system of levers and a platoon rod, which is withdrawn from the impacting head and ends at the top of the borehole shell with a special hook. The cocking mechanism serves to retract the striker from the firing pin, with the coil spring being compressed. The trigger mechanism consists of a trigger comb, lifting levers and the trigger stem, which is also withdrawn from the impacting head and ends at the top of the wellbore and a special hook. The descent mechanism serves to fix the striker in the designated position and descend the striker, while releasing the striker with the force of a compressed helical spring strikes the striker, displacing it in the direction of the impact.

When the platoon rod moves from bottom to top, the platoon combs fixed to the levers retracted the firing pin from the firing pin and, in the designated position, the firing pin is fixed by the trigger comb. During the subsequent downward movement of the plunger, the plunger combs return to their original position without engaging with the striker. The re-movement of the platoon shaft from bottom to top, the platoon combs are engaged with the striker and move it to the next fixed position. In order to fully strike the striker, it is necessary to make several movements of the platoon rod from bottom to top, and the striker passes through several fixed positions. The striker is launched from any fixed position by raising the trigger stem, which first through the lifting levers lifts the platoon combs and then the trigger combs. The freed head under the action of the coil spring produces a blow to the firing pin.

The impactor is pressed against the borehole wall by means of a clamping rod, levers, and a casing 5 connected to the body of the wellbore 2 by a hinge. When the presser stem moves upward, the levers retract the casing 5 from the impact head 4. The casing and the hammer are pressed against the opposite walls of the squall. The clamping rod ends at the top of the borehole with a special hook.

The borehole hole 2 is connected to the bar S by means of a lock 7. There are three rods inside the rod, which end on both sides with special hooks. The rods of the wellbore are connected to the rods of the rod. An operating head 9 is attached to the upper end of the rod by means of a lock 7. On the operating head there is a lifting mechanism 10, a platoon knob 11 and a lowering knob 12. The lifting mechanism, a platoon knob and a lowering knob are connected to the rods, which end in the lower part of the operational head hooks. The rod rods are connected to the rods of the production head. On the soil surface, the rod is fixed by means of a base plate 13.

The die in the projectile lowered into the well is produced by a platoon knob, which is connected through the rod in the rod to the platoon head of the striking head. The striker is lowered by the handle of the trigger, which is connected through the rod in the rod with the trigger rod of the impacting head. The impactor is clamped by means of a lifting mechanism, which is connected through the rod in the rod with the downhole pressure rod. The depth of the impact location is determined by the number of rods placed between the wellbore and the production head.

Subject invention

Claims (2)

1. A method of deep shock excitation of transverse seismic waves, characterized in that, for the purpose of shock excitation of transverse waves at different depths from the soil surface, the source of shock excitation of waves is transported to a depth by means of a projectile lowered into a borehole, and the excitation of waves it is produced directly in the well at various depths from its mouth by striking the geological rocks of the well walls with a special percussion device. 2. A device for carrying out the method according to claim 1, characterized in that, in order to be able to repeat the excitations of shock waves to rocks at different depths from the soil surface, it is made in the form of a mechanical exciter consisting of a metal housing a coil spring, a striker and a hammer mounted in the form of a borehole projectile lowered into the well on metal tube rods, and for controlling the surface with the orientation of the exciter, the platoon and the descent the gift spring of it, applied the rods, laid inside shtang. - 3 - № 124648