CN219417757U

CN219417757U - Reverse VSP exploration deep well excitation device

Info

Publication number: CN219417757U
Application number: CN202320763816.4U
Authority: CN
Inventors: 李林元; 朱书阶; 王万合; 牟棋; 李晓强; 段建强
Original assignee: CCTEG Xian Research Institute Group Co Ltd
Current assignee: CCTEG Xian Research Institute Group Co Ltd
Priority date: 2023-04-10
Filing date: 2023-04-10
Publication date: 2023-07-25
Anticipated expiration: 2033-04-10

Abstract

The utility model provides a reverse VSP exploration deep well excitation device, includes circular telegram cable, counter weight, buffer spring, casing and bottom, counter weight, buffer spring and casing connect gradually from top to bottom, the casing contains cavity form body, the top of cavity form body is equipped with sealed top cap, be equipped with the explosive package in the casing, the explosive package is equipped with the detonator, the detonator is connected to the one end of detonator leg wire, be equipped with the top cap link ring of connecting buffer spring and the V type through wires hole that supplies the detonator leg wire to run through on the top cap, the bottom of casing links to each other with the bottom that has many energy gathering grooves, the detonator leg wire passes buffer spring and counter weight in proper order after the other end is connected to circular telegram cable; therefore, the utility model has simple structure and convenient operation and loading and unloading, and can effectively solve the problems of explosive explosion rejection or explosive detonator deformation which often occur along with the increase of the depth of the excitation point position under the influence of water pressure during the excitation in the deep hole.

Description

Reverse VSP exploration deep well excitation device

Technical Field

The utility model relates to the technical field of geophysical exploration, in particular to a deep well excitation device for inverse VSP exploration.

Background

VSP exploration (Vertical Seismic Profiling) is a mature geophysical exploration method, adopts a ground excitation and hole receiving method, is similar to CT (Computed Tomography) technology, can realize transmission radiography imaging of the inside of the earth, and achieves the purpose of finding out the speed of a subsurface stratum, bad geological bodies and cracks. The method is mainly used in the petroleum geophysical prospecting field, is rarely used in other prospecting fields, and has higher requirements on stratum speed and prospecting precision of various geological abnormal bodies along with development of coal mine goaf prospecting in recent years.

Because the number of receiving channels in the VSP exploration hole is limited, the exploration cost is very high, and in order to reduce the cost, save energy and reduce emission, according to the principle of exchange of the offset points, the reverse VSP exploration technology is rapidly developed. However, the existing excitation mode in the hole is easily affected by water pressure, and the problems of explosive deformation or explosive explosion rejection easily occur along with the increase of the depth of the excitation point.

Therefore, in view of the above-mentioned drawbacks, the present inventors have studied and designed a deep well excitation device for reverse VSP exploration by combining the experience and results of related industries for a long period of time through intensive research and design.

Disclosure of Invention

The utility model aims to provide a deep well excitation device for reverse VSP exploration, which has a simple structure and is convenient to operate, assemble and disassemble, and the problems of explosive explosion rejection or explosive detonator deformation which often occur along with the increase of the depth of an excitation point due to the influence of water pressure during excitation in a deep hole can be effectively solved.

In order to achieve the above purpose, the utility model discloses a deep well excitation device for reverse VSP exploration, which comprises an energizing cable, a counterweight, a buffer spring, a shell and a bottom cover, and is characterized in that:

the balance weight, the buffer spring and the shell are sequentially connected from top to bottom, the shell comprises a hollow body, a sealed top cover is arranged at the top end of the hollow body, an explosive package is arranged in the shell, the explosive package is provided with a detonator, the detonator is connected to one end of a detonator leg wire, a top cover linking ring connected with the buffer spring and a V-shaped threading hole for the detonator leg wire to penetrate through are arranged on the top cover, the bottom of the shell is connected with a bottom cover with a plurality of energy gathering grooves, the detonator leg wire sequentially penetrates through the buffer spring and the balance weight, and then the other end of the detonator leg wire is connected to an electrified cable, and the balance weight is of a hollow structure.

Wherein: the top cover is welded at the top of the shell, the top cover link ring is welded at the center of the top cover, and the V-shaped threading hole is arranged in a non-center area of the top cover.

Wherein: and a V-shaped rubber sleeve is arranged in the V-shaped threading hole.

Wherein: a sealing rubber ring is arranged between the shell and the bottom cover.

Wherein: the bottom of casing is equipped with a plurality of installation screw, the bottom corresponds and is equipped with a plurality of screw to fix the bottom on the casing through bolt thread to screw and installation screw.

Wherein: the installation screw hole at the bottom of the shell is multiple times of the screw hole of the bottom cover, so that the shell can be reused for multiple times.

Wherein: the one end of buffer spring is equipped with the lower link knot that is connected to the top cap link ring, and the other end is equipped with the upper link knot that is connected to the counter weight, the one end of counter weight is equipped with the lower link ring of being connected to upper link knot, and the other end is equipped with the upper link ring, the detonator leg wire runs through the both ends of counter weight.

Wherein: the power-on cable is a multi-core armor cable, a plurality of power-on core cables are arranged inside the multi-core armor cable, the power-on core cables are made of copper core materials, and the external tensile armor is made of steel wires.

Wherein: the bottom cover is provided with three energy gathering grooves which radially extend from the center of the bottom cover at equal angle intervals.

From the above, the reverse VSP exploration deep well excitation device of the utility model has the following effects:

1. the structure is matched and installed, the water-resistant pressure capability is greatly enhanced, the bottom cover is designed to be convenient for quick placement of the explosive package, and the explosive package can be smoothly dropped, thrown and recycled by the shell when the explosive package is detonated; the buffer spring can effectively reduce the blasting recoil effect and protect the cable from being damaged.

2. The reverse VSP exploration construction efficiency can be remarkably improved, the data quality of the materials is improved, the shell can be reused, and the exploration cost is reduced.

The details of the present utility model can be found in the following description and the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 shows a schematic structure of a deep well excitation device for reverse VSP exploration according to the present utility model.

Fig. 2 shows a bottom elevation view of the housing of the present utility model.

Fig. 3 shows a schematic front view of the bottom cover of the present utility model.

Reference numerals:

1-energizing cable, 2-counterweight, 2-1-up link ring, 2-2 down link ring, 3-buffer spring, 3-1-down link buckle, 3-2-up link buckle, 4-shell, 4-1-top cover, 4-2-top cover link ring, 4-3-V type threading hole, 4-4-mounting screw hole, 5-bottom cover, 5-1-screw hole, 5-2-energy collecting groove, 6-explosive package, 6-1-detonator, 6-2-detonator foot line.

Detailed Description

Referring to fig. 1, 2 and 3, a reverse VSP survey deep well excitation apparatus of the present utility model is shown.

The reverse VSP exploration deep well excitation device comprises an electrified cable 1, a counterweight 2, a buffer spring 3, a shell 4 and a bottom cover 5, wherein the counterweight 2, the buffer spring 3 and the shell 4 are sequentially connected from top to bottom, the shell 4 comprises a hollow body, the top end of the hollow body is provided with a sealed top cover 4-1, an explosive package 6 is arranged in the shell 4, a detonator 6-1 is arranged in the explosive package 6, the detonator 6-1 is connected to one end of a detonator leg wire 6-2, the top cover 4-1 is provided with a top cover linking ring 4-2 for connecting the buffer spring and a V-shaped threading hole 4-3 for allowing the detonator leg wire 6-2 to penetrate, the bottom of the shell 4 is connected with the bottom cover 5 provided with a plurality of screw holes 5-1 and a plurality of energy gathering grooves 5-2, the buffer spring 3 is arranged between the counterweight 2 and the shell 4, the shell 4 can be effectively prevented from upwards backflushing to break the electrified cable 1 during initiation, the detonator leg wire 6-2 sequentially passes through the buffer spring 3 and the counterweight 2 and then is connected to the electrified cable 1 at the other end, the counterweight 2 is of a hollow structure, the whole sinking speed of the device can be quickened, the electrified cable can be straightened, the depth positioning precision of the device is ensured, the detonator leg wire 6-2 passes through the counterweight 2, the buffer spring 3 and the shell 4, the phenomena of short circuit and open circuit caused by collision between the detonator leg wire and the wall of the hole can be effectively prevented, thereby the deep well excitation device for reverse VSP exploration solves the problem of explosion rejection or deformation caused by the water pressure of the explosive, the safety of the electrified cable can be protected through the buffer spring, the construction efficiency is improved, the smooth falling and casting during high-efficiency placement of the explosive and explosion can be realized through the design of the bottom cover, the shell can be repeatedly used, the exploration cost is reduced, the bottom cover is used as the weakest link of the shell, and the energy collecting groove is designed to play a role in energy collection, so that seismic waves generated by explosion are directionally propagated downwards as much as possible, and the quality of acquired data is improved.

Wherein the top cover 4-1 can be directly welded at the top of the shell, the top cover link ring 4-2 can be welded at the center of the top cover 4-1, the V-shaped threading hole 4-3 can be arranged in a non-center area of the top cover 4-1, preferably, a V-shaped rubber sleeve is arranged in the V-shaped threading hole 4-3, thereby ensuring the tightness of the shell 4 and facilitating the penetration of detonator leg wires,

wherein, can be equipped with the sealed rubber ring between casing 4 and bottom 5, guaranteed the leakproofness of casing, avoid there being the clearance between bottom 5 and the casing 4 to lead to the problem of explosive package damage because of leaking.

Referring to fig. 2 and 3, a plurality of mounting screw holes 4-4 are formed in the bottom of the housing 4, and a plurality of screw holes 5-1 are formed in the bottom cover 5, so that the bottom cover 5 can be fixed to the housing 4 by fastening the screw holes 5-1 and the mounting screw holes 4-4 through screw threads, and the mounting screw holes in the bottom of the housing 4 are several times that of the bottom cover, so that the housing can be reused.

Wherein, one end of the buffer spring 3 is provided with a lower linking buckle 3-1 connected to a top cover linking ring 4-2, the other end is provided with an upper linking buckle 3-2 connected to a counterweight 2, one end of the counterweight 2 is provided with a lower linking ring 2-2 connected to the upper linking buckle 3-2, the other end is provided with an upper linking ring 2-1, the detonator leg wire 6-2 penetrates through two ends of the counterweight 2, the upper linking ring 2-1 and the lower linking ring 2-2 are both provided with central positions of two ends of the counterweight 2, and the detonator leg wire 6-2 penetrates through the middle of the buffer spring 3 after penetrating through non-central positions of two ends of the counterweight 2, thereby providing safety protection for the detonator leg wire 6-2.

The electrified cable is a multi-core armor cable, and is a cable which is pulled to be put down by a shell and is a lengthening wire of an electric detonator lead wire in the shell; the counterweight is added for accelerating the sinking speed of the explosive bag, so that the construction efficiency and the depth positioning precision are improved; the buffer spring is used for preventing cable damage caused by rebound action when the explosive bag explodes; the shell is a cavity for accommodating the explosive package, plays roles of water resistance and water pressure resistance, and protects the explosive from compression deformation or explosion rejection; the bottom cover is a bottom cover with a plurality of screw holes and a plurality of energy gathering grooves, which is added for sealing the shell, can realize the characteristic of fast placing the explosive package, can enable the bottom cover to fall off smoothly, throw and focus energy and directionally spread during the detonation, and protects the well wall and the shell. Further, the reverse VSP exploration construction efficiency can be remarkably improved, the data quality of the materials is improved, the operation cost is reduced, and the equipment damage is reduced.

The electrified cable has the dual functions of tensile resistance and electric conduction, a plurality of electrified core cables are arranged in the electrified cable, the electrified core cables are made of copper core materials, and the tensile armor is made of steel wires.

Wherein the counterweight is made of metal with high density.

Wherein, buffer spring is steel material.

As shown in fig. 3, the bottom cover 5 is made of metal, the plurality of energy collecting grooves 5-2 are three, and the three energy collecting grooves radially extend from the center of the bottom cover 5 at equal angle intervals, so that after the explosive package is quickly placed, the bottom cover can be smoothly dropped, thrown and energy focused and directionally spread during detonation, and further the well wall and the shell are protected.

It is to be clearly understood that the above description and illustration is made only by way of example and not as a limitation on the disclosure, application or use of the utility model. Although embodiments have been described in the embodiments and illustrated in the accompanying drawings, the utility model is not limited to the specific examples illustrated by the drawings and described in the embodiments as the best mode presently contemplated for carrying out the teachings of the utility model, and the scope of the utility model will include any embodiments falling within the foregoing specification and the appended claims.

Claims

1. The utility model provides a contrary VSP exploration deep well excitation device, includes circular telegram cable, counter weight, buffer spring, casing and bottom, its characterized in that:

2. The reverse VSP survey deep well excitation device of claim 1, wherein: the top cover is welded at the top of the shell, the top cover link ring is welded at the center of the top cover, and the V-shaped threading hole is arranged in a non-center area of the top cover.

3. The reverse VSP survey deep well excitation device of claim 2, wherein: and a V-shaped rubber sleeve is arranged in the V-shaped threading hole.

4. The reverse VSP survey deep well excitation device of claim 1, wherein: a sealing rubber ring is arranged between the shell and the bottom cover.

5. The reverse VSP survey deep well excitation device of claim 1, wherein: the bottom of casing is equipped with a plurality of installation screw, the bottom corresponds and is equipped with a plurality of screw to fix the bottom on the casing through bolt thread to screw and installation screw.

6. The reverse VSP survey deep well excitation device of claim 5, wherein: the installation screw hole at the bottom of the shell is multiple times of the screw hole of the bottom cover, so that the shell can be reused for multiple times.

7. The reverse VSP survey deep well excitation device of claim 1, wherein: the one end of buffer spring is equipped with the lower link knot that is connected to the top cap link ring, and the other end is equipped with the upper link knot that is connected to the counter weight, the one end of counter weight is equipped with the lower link ring of being connected to upper link knot, and the other end is equipped with the upper link ring, the detonator leg wire runs through the both ends of counter weight.

8. The reverse VSP survey deep well excitation device of claim 1, wherein: the power-on cable is a multi-core armor cable, a plurality of power-on core cables are arranged inside the multi-core armor cable, the power-on core cables are made of copper core materials, and the external tensile armor is made of steel wires.

9. The reverse VSP survey deep well excitation device of claim 1, wherein: the bottom cover is provided with three energy gathering grooves which radially extend from the center of the bottom cover at equal angle intervals.