CN210572782U - Coal bed gas fracturing monitoring devices based on monitoring of microseism crack - Google Patents

Abstract

The utility model discloses a coal bed gas fracturing monitoring devices based on monitoring of microseism crack, including baffle, telescopic machanism, telescopic link, monitor, shell fragment, fixture block, protection mechanism, safety cover, bracing piece, mount pad and spheroid. The utility model has the advantages that: when the earth surface monitoring is carried out, a plurality of shallow wells are arranged in the fixed direction around the coal-bed gas well, and the monitoring device is placed in the shallow wells. If the local diving level is shallow, the underground water can be generated at the lower part of the shallow well after the well is formed, the ball body is a floating ball, and when the water level is changed, the floating ball can move up and down along with the buoyancy force on the telescopic rod, so that the monitor below the floating ball mounting seat is always at the fixed position below the water surface, the monitor can not sink to the water bottom and is buried by mud, the monitor is convenient to take out, and meanwhile, the monitoring result is more accurate; if the local diving space is deep, no water exists in a shallow well after the well is formed, the ball body is a weighted ball, the weighted ball can ensure that a monitor under the mounting seat is inserted into a well substrate, and the data monitored by the monitor is more accurate.

Description

Coal bed gas fracturing monitoring devices based on monitoring of microseism crack

Technical Field

The utility model relates to a coal bed gas fracturing monitoring devices specifically is a coal bed gas fracturing monitoring devices based on monitoring of microseism crack, belongs to detection area.

Background

The fracturing transformation can increase a coal seam seepage passage, more effectively reduce the pressure of a coal seam reservoir to critical desorption pressure when water is drained and gas is produced under reduced pressure, increase the gas desorption rate and increase the productivity. Therefore, in the exploration and development of coal bed gas, the fracturing modification is generally applied as an important strengthening measure. When casing fracturing is carried out on a coal-bed gas well, high-speed fluid is pressed into the coal bed in a short time through a casing in the well, multiple artificial fracturing cracks can be generated in the coal bed within the range of 200m of the periphery of the gas well, part of natural cracks are communicated, the micro-seismic phenomenon can be generated simultaneously, multiple coal-bed gas fracturing monitoring devices are arranged on the ground surface, micro-seismic signals generated by underground coal-bed cracks can be effectively collected, the development characteristics of crack space are analyzed and researched, and the coal-bed gas fracturing effect is evaluated.

When the earth surface micro earthquake monitoring is carried out, if a shallow well is filled with water, the soil layer of the well wall is often collapsed due to long-term soaking, the monitor is embedded into the well and cannot be taken out, and parts are damaged; if the shallow well is not water, the monitor can not be effectively inserted into the well bottom soil layer, so that the accuracy of the monitored data can not be ensured.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a coal seam gas fracturing monitoring devices based on monitoring of microseism crack just in order to solve above-mentioned problem, the flexible operation, the installation is simple, the fixed of the monitor of being convenient for to prevent that the monitor from being submerged at the in-process that the water level rises, lead to the damage of inside part. .

The utility model discloses a following technical scheme realizes above-mentioned purpose, a coal bed gas pressure splits monitoring devices based on monitoring of microseism crack, which comprises a mounting bas, mount pad fixed connection telescopic machanism, telescopic machanism includes telescopic link and monitor, mount pad fixed connection the monitor, the spheroid is connected to the monitor, spheroid sliding connection the telescopic link, spheroid fixed connection protection mechanism, protection mechanism sliding connection the telescopic link, protection mechanism sliding connection is in the monitor.

Preferably, for the purpose of preventing the rubble in the crack and the floater in the aquatic right spheroidal injury, utilize the safety cover is right the spheroid is protected, protection mechanism includes safety cover and bracing piece, the one end fixed connection of bracing piece the lateral wall of floater, the other end fixed connection of bracing piece the safety cover, safety cover sliding connection the telescopic link, safety cover sliding connection the monitor.

Preferably, for convenience, the telescopic link with fixed between the monitor, prevent the telescopic link with slip between the monitor, telescopic machanism still includes shell fragment and fixture block, shell fragment fixed connection the inside of telescopic link, shell fragment fixed connection the fixture block, the fixture block deviates from the one end of shell fragment is the arc structure, fixture block draw-in groove a.

Preferably, for the convenience of carrying out the length adjustment of multistage between the telescopic link with the monitor, the shell fragment with the fixture block is equipped with a plurality ofly, the shell fragment with the fixture block is about the central line symmetry of telescopic link sets up, draw-in groove a is equipped with a plurality ofly, and is a plurality of draw-in groove a is even arrange in the inner wall of monitor.

Preferably, in order to facilitate the use of the ball in an environment where the local water level is shallow, the ball is a hollow floating ball.

Preferably, the ball is a weighted ball in order to facilitate use of the ball in environments where the local diver's ground is deep.

Preferably, in order to prevent better protection of the ball body, a baffle is arranged at the top end of the telescopic rod, and the diameter of the cylindrical baffle is larger than that of the spherical protective cover.

The utility model has the advantages that: when the earth surface monitoring is carried out, a plurality of shallow wells are arranged in the fixed direction around the coal-bed gas well, and the monitoring device is placed in the shallow wells. If the local diving level is shallow, the underground water can be generated at the lower part of the shallow well after the well is formed, the ball body is a floating ball, and when the water level is changed, the floating ball can move up and down along with the buoyancy force on the telescopic rod, so that the monitor below the floating ball mounting seat is always at the fixed position below the water surface, the monitor can not sink to the water bottom and is buried by mud, the monitor is convenient to take out, and meanwhile, the monitoring result is more accurate; if the local diving space is deep, no water exists in a shallow well after the well is formed, the ball body is a weighted ball, the weighted ball can ensure that a monitor under the mounting seat is inserted into a well substrate, and the data monitored by the monitor is more accurate.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the telescoping mechanism and the protection mechanism shown in FIG. 1;

fig. 3 is an enlarged view of the portion a shown in fig. 2.

In the figure: 1. baffle, 2, telescopic machanism, 21, telescopic link, 22, monitor, 22a, draw-in groove, 23, shell fragment, 24, fixture block, 3, protection mechanism, 31, safety cover, 32, bracing piece, 4, mount pad, 5, spheroid.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Please refer to fig. 1-3, a coal bed gas pressure crack monitoring device based on micro-seismic crack monitoring comprises a mounting base 4, the mounting base 4 is fixedly connected with a telescopic mechanism 2, the telescopic mechanism 2 comprises a telescopic rod 21 and a monitor 22, the mounting base 4 is fixedly connected with the monitor 22, the monitor 22 is connected with a sphere 5, the sphere 5 is slidably connected with the telescopic rod 21, the sphere 5 is fixedly connected with a protection mechanism 3, the protection mechanism 3 is slidably connected with the telescopic rod 21, and the protection mechanism 3 is slidably connected with the monitor.

As a technical optimization scheme of the utility model, protection mechanism 3 includes safety cover 31 and bracing piece 32, the one end fixed connection of bracing piece 32 the lateral wall of spheroid 5, the other end fixed connection of bracing piece 32 safety cover 31, safety cover 31 sliding connection telescopic link 21, safety cover 31 sliding connection monitor 22.

As a technical optimization scheme of the utility model, telescopic machanism 2 still includes shell fragment 23 and fixture block 24, shell fragment 23 fixed connection the inside of telescopic link 21, shell fragment 23 fixed connection fixture block 24, fixture block 24 deviates from the one end of shell fragment 23 is the arc structure, 24 block draw-in grooves 22a of fixture block.

As a technical optimization scheme of the utility model, the shell fragment 23 with fixture block 24 is equipped with a plurality ofly, the shell fragment 23 with fixture block 24 about the central line symmetry of telescopic link 21 sets up, draw-in groove 22a is equipped with a plurality ofly, and is a plurality of draw-in groove 22a even range in monitor 22's inner wall.

As a technical optimization scheme of the utility model, spheroid 5 is the cavity floater.

As a technical optimization scheme of the present invention, the ball body 5 is a weighted ball.

As a technical optimization scheme of the utility model, the top of telescopic link 21 is equipped with baffle 1, and is columniform baffle 1's diameter is greater than spherically the diameter of safety cover 31.

The utility model discloses when using, at first, when carrying out the sleeve pipe fracturing to coal bed gas well, high-speed fluid is pressed into the coal seam in by the short time through well casing pipe, and the coal seam can produce many artifical fracturing cracks, can accompany the microseism phenomenon to take place this moment, arranges a plurality of coal bed gas fracturing monitoring devices through the earth's surface, can effectively collect the microseism signal that underground coal bed crack produced, and the analysis and research crack space develops the characteristic, appraises coal bed gas fracturing effect. When the earth surface monitoring is carried out, a plurality of shallow wells are arranged in the fixed direction around the coal-bed gas well, and the monitoring device is placed in the shallow wells. If the local diving level is shallow, the underground water can be generated at the lower part of the shallow well after the well is formed, the ball body 5 is a floating ball, when the water level is changed, the floating ball can move up and down along with the buoyancy force at the telescopic rod 21, so that the monitor 22 below the floating ball mounting seat 4 is always at the fixed position below the water surface, the condition that the monitor is submerged in the mud and is convenient to take out is ensured, and meanwhile, the monitoring result is more accurate; if the local diving space is deep and no water exists in a shallow well after the well is formed, the ball body 5 is a weighted ball which can ensure that the monitor 22 under the mounting seat 4 is inserted into a well substrate layer, and the data monitored by the monitor 22 is more accurate; and the ball 5 is protected by the protective cover 31.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (7)

1. The utility model provides a coal seam gas fracturing monitoring devices based on monitoring of microseism crack, includes mount pad (4), its characterized in that: mount pad (4) fixed connection telescopic machanism (2), telescopic machanism (2) include telescopic link (21) and monitor (22), mount pad (4) fixed connection monitor (22), spheroid (5) are connected in monitor (22), spheroid (5) sliding connection telescopic link (21), spheroid (5) fixed connection protection mechanism (3), protection mechanism (3) sliding connection telescopic link (21), protection mechanism (3) sliding connection in monitor.

2. The coalbed methane fracture monitoring device based on microseismic fracture monitoring of claim 1, wherein: protection mechanism (3) are including safety cover (31) and bracing piece (32), the one end fixed connection of bracing piece (32) the lateral wall of spheroid (5), the other end fixed connection of bracing piece (32) safety cover (31), safety cover (31) sliding connection telescopic link (21), safety cover (31) sliding connection monitor (22).

3. The coalbed methane fracture monitoring device based on microseismic fracture monitoring of claim 1, wherein: the telescopic mechanism (2) further comprises an elastic sheet (23) and a clamping block (24), the elastic sheet (23) is fixedly connected with the inside of the telescopic rod (21), the elastic sheet (23) is fixedly connected with the clamping block (24), one end, deviating from the elastic sheet (23), of the clamping block (24) is of an arc-shaped structure, and the clamping block (24) is clamped with the clamping groove (22 a).

4. The coalbed methane fracture monitoring device based on microseismic fracture monitoring of claim 3, wherein: the elastic pieces (23) and the clamping blocks (24) are arranged in a plurality, the elastic pieces (23) and the clamping blocks (24) are symmetrically arranged around the central line of the telescopic rod (21), the clamping grooves (22a) are arranged in a plurality, and the clamping grooves (22a) are uniformly arranged on the inner wall of the monitor (22).

5. The coalbed methane fracture monitoring device based on microseismic fracture monitoring of claim 1, wherein: the ball body (5) is a hollow floating ball.

6. The coalbed methane fracture monitoring device based on microseismic fracture monitoring of claim 1, wherein: the ball body (5) is a weighted ball.

7. The coalbed methane fracture monitoring device based on microseismic fracture monitoring of claim 2, wherein: the top of telescopic link (21) is equipped with baffle (1), and is columniform baffle (1)'s diameter is greater than spherical safety cover (31)'s diameter.

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