阅读说明：本技术 一种适用于井下强震仪的扶正器 (Centralizer suitable for strong appearance that shakes in pit ) 是由 黄杜若 孙培贵 金峰 梁婷 曹子龙 林宁 杜三林 杨传根 封伯昊 于 2021-08-12 设计创作，主要内容包括：本公开提供的一种适用于井下强震仪的扶正器,包括：顶板,若干角度调节组件,倾角仪和控制器；角度调节组件位于顶板和井下强震仪之间,包括支撑件和用于调节支撑件的角度的驱动部件；倾角仪与井下强震仪刚性连接,用于测量井下强震仪的倾角信号；控制器用于接收倾角信号,通过倾角信号控制驱动部件来调节支撑件的角度,使得井下强震仪处于铅直状态。本公开可以准确的判断井下强震仪的倾斜情况并作出扶正,提高了井下强震仪测量的准确性。(The utility model provides a centralizer suitable for macroseism appearance in pit, include: the device comprises a top plate, a plurality of angle adjusting assemblies, an inclinometer and a controller; the angle adjusting assembly is positioned between the top plate and the underground strong seismograph and comprises a support and a driving part for adjusting the angle of the support; the inclinometer is rigidly connected with the underground strong seismograph and is used for measuring inclination angle signals of the underground strong seismograph; the controller is used for receiving the inclination angle signal and controlling the driving part through the inclination angle signal to adjust the angle of the supporting part, so that the underground strong vibration instrument is in a vertical state. The method can accurately judge the inclination condition of the underground strong seismograph and perform centralization, and improves the measurement accuracy of the underground strong seismograph.)

1. A centralizer suitable for a downhole seismograph, comprising:

the top plate is positioned above the underground strong seismograph;

the angle adjusting components are uniformly distributed between the top plate and the underground strong vibration instrument along the circumferential direction of the top plate; the angle adjusting assembly comprises a support and a driving part for adjusting the angle of the support, and the bottom end of the support is rigidly connected with the downhole seismograph;

the inclinometer is rigidly connected with the underground strong seismograph and used for measuring inclination angle signals of the underground strong seismograph; and

the controller is electrically connected with the inclinometer and each driving part and used for receiving the inclination angle signal and controlling the driving parts through the inclination angle signal to adjust the angle of the supporting piece, so that the underground seismograph is in a vertical state.

2. The centralizer of claim 1, wherein the drive member is fixedly coupled to the top plate, the drive member having an output coupled to a top end of the support.

3. The centralizer of claim 1, wherein the drive member controls movement of the support in a radial direction of the top plate.

4. The centralizer of claim 1, wherein the support member comprises a plurality of rods pivotally connected to each other, wherein a top end of the rod positioned at the uppermost position is connected to the output end of the driving member, and a bottom end of the rod positioned at the lowermost position is rigidly connected to the downhole seismograph.

5. The centralizer of claim 1, wherein each support is in a straightened state during lowering of the downhole seismograph.

6. The centralizer of claim 1, wherein each of the supports is in an expanded state when the downhole seismograph reaches the bottom of the borehole.

7. A centralizer as claimed in any one of claims 1 to 6 wherein during descent of the downhole seismograph, the outer diameter of the centralizer does not exceed the outer diameter of the downhole seismograph; the centralizer has an outer diameter between the outer diameter of the downhole seismograph and the inner diameter of the borehole when the downhole seismograph reaches the bottom of the borehole.

Technical Field

The utility model relates to an engineering macroseism measures the field, in particular to centralizer suitable for strong seismograph in pit.

Background

The strong earthquake observation is an effective way for deepening the scientific cognition of the earthquake, and the underground strong earthquake measurement has important significance for recognizing the field amplification effect of earthquake motion. At present, mature underground strong shock measuring equipment, namely an underground strong shock instrument, is available. An important factor in the strong earthquake measurement is that three earthquake motion components of east-west, north-south and vertical are accurately measured, and the accurate measurement of the three-component earthquake motion has important significance for the analysis of the regional attenuation relation of the earthquake motion, the analysis of the earthquake motion field effect caused by topographic geological conditions, the analysis of earthquake seismographic phase and the like. To achieve accurate measurement of three-component seismic motion, accurate horizontal orientation and vertical righting of the seismograph (ensuring that the inclination of the device is zero) must be achieved.

The underground strong seismograph is an instrument used for measuring underground seismic acceleration in an earthquake and mainly has the function of obtaining the deep underground seismic distribution rule. By utilizing the comparison of the underground strong seismograph and the earth surface strong seismograph, the method is favorable for understanding the amplification or reduction effect of different topographic and geological conditions on seismic oscillation, and is favorable for improving the understanding of the seismic distribution rule under the complex geological conditions. A key problem in the installation and use of the existing underground strong seismograph is how to realize the accurate righting of the strong seismograph, if the accurate righting cannot be realized (namely the strong seismograph has an inclination angle with the vertical direction), the measured three-component seismic motion is not the three components of east-west-south-north-vertical, and the result cannot be compared with the result of the earth surface strong seismograph. The scheme adopted at present is to strictly limit the hole inclination and the hole diameter of a drilling well for installing the strong seismograph, so that the inclination angle of the strong seismograph is in a smaller range (less than 3 degrees) by limiting the hole inclination and the hole diameter, and the measurement error caused by a small inclination angle is ignored. However, the measurement error of the method still has great influence on high-precision seismic motion analysis and cannot be ignored. The limitation on the hole inclination and the hole diameter also can seriously affect the applicability of the underground strong seismograph, the underground strong seismograph cannot be effectively installed and used in regions with complicated geological conditions and large drilling capacity limitation, and the limitation on the increase of the cognition on the seismic motion distribution rule under the complicated geological and topographic conditions is serious.

Disclosure of Invention

The present disclosure is directed to solving one of the problems set forth above.

Therefore, the utility model provides an accessible inclination control realizes rightting the macroseism appearance in the pit to guarantee the centralizer of seismograph high accuracy measurement in the pit, include:

the top plate is positioned above the underground strong seismograph;

the angle adjusting components are uniformly distributed between the top plate and the underground strong vibration instrument along the circumferential direction of the top plate; the angle adjusting assembly comprises a support and a driving part for adjusting the angle of the support, and the bottom end of the support is rigidly connected with the downhole seismograph;

the inclinometer is rigidly connected with the underground strong seismograph and used for measuring inclination angle signals of the underground strong seismograph; and

the controller is electrically connected with the inclinometer and each driving part and used for receiving the inclination angle signal and controlling the driving parts through the inclination angle signal to adjust the angle of the supporting piece, so that the underground seismograph is in a vertical state.

The centralizer suitable for strong seismograph in pit that this is disclosed has following characteristics and beneficial effect:

the centralizer suitable for the underground strong seismograph provided by the disclosure utilizes the driving part to control the angle of the supporting part, and adjusts the inclination degree of the underground strong seismograph and the centralizer through the change of the angle of the supporting part. And the reading of the inclinometer is utilized to continuously reduce the inclination angle of the underground strong seismograph, and finally, the underground strong seismograph is accurately righted. Because the centralizer suitable for the underground strong seismograph is rigidly connected to the upper part of the underground strong seismograph, the inclination condition of the underground strong seismograph can be accurately judged and centralization can be carried out, the measurement of the underground strong seismograph cannot be influenced, and the underground strong seismograph can be accurately centralized.

In some embodiments, the driving member is fixedly connected to the top plate, and the driving member has an output end connected to a top end of the support.

In some embodiments, the driving part controls the support to move in a radial direction of the top plate.

In some embodiments, the support member includes a plurality of rods pivotally connected to each other, a top end of the rod located at the uppermost position is connected to the output end of the driving member, and a bottom end of the rod located at the lowermost position is rigidly connected to the downhole seismograph.

In some embodiments, during lowering of the downhole seismograph, each of the supports is in a straightened state.

In some embodiments, each of the supports is in an open state when the downhole seismograph reaches the bottom of the borehole.

In some embodiments, during lowering of the downhole seismograph, the outer diameter of the centralizer does not exceed the outer diameter of the downhole seismograph; the centralizer has an outer diameter between the outer diameter of the downhole seismograph and the inner diameter of the borehole when the downhole seismograph reaches the bottom of the borehole.

Drawings

Fig. 1 is a schematic overall structural diagram of a centralizer suitable for a downhole seismograph according to an embodiment of the present disclosure;

fig. 2 (a), (b), and (c) the present disclosure provides a schematic diagram of a centralizer for a downhole tool during a downhole process, where (a) is a schematic diagram of a state of the centralizer and the downhole tool during a downhole stage, (b) is a schematic diagram of a state of the centralizer and the downhole tool during the centralization process, and (c) is a schematic diagram of a state of the centralizer and the downhole tool after the centralization.

Reference numerals:

1: top plate, 2: angle adjustment assembly, 21: support, 22: drive means, 3: inclinometer, 4: controller, 5: connecting piece, 6: downhole seismograph, 7: and (6) drilling.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

On the contrary, this application is intended to cover any alternatives, modifications, equivalents, and alternatives that may be included within the spirit and scope of the application as defined by the appended claims. Furthermore, in the following detailed description of the present invention, certain specific details are set forth in order to provide a better understanding of the present application. It will be apparent to one skilled in the art that the present application may be practiced without these specific details.

Referring to fig. 1, the centralizer suitable for borehole strong seismograph that this disclosed embodiment provided sets up in the top of borehole strong seismograph, includes:

the top plate 1 is positioned above the underground strong seismograph 6;

the angle adjusting components 2 are uniformly distributed on the top plate 1 along the circumferential direction of the top plate 1; each angle adjusting assembly 2 comprises a support member 21 and a driving part 22 for adjusting the angle of the support member 21, and the bottom end of the support member 21 is rigidly connected with the downhole strong seismograph 6;

the inclinometer 3 is rigidly connected with the underground strong seismograph 6 and used for measuring inclination angle signals of the underground strong seismograph 6; and

and the controller 4 is electrically connected with the inclinometer 3 and each driving part 22 and is used for receiving an inclination angle signal measured by the inclinometer 3, and controlling the driving part 22 through the inclination angle signal to adjust the angle of the support 21 so that the downhole seismograph 6 is in a vertical state.

In some embodiments, the top plate 1 is a flat plate with a certain thickness as a base for mounting the angle adjusting assembly 2, and the driving member 22 is uniformly mounted on the top plate 1, for example, fixed to the upper surface of the top plate 1, or fixed to the side surface or the bottom surface of the top plate 1.

In some embodiments, each driving part 22 in the angle adjusting assembly 2 employs a driving motor, an output end of each driving motor is connected to a top end of a corresponding one of the supporting members 21, and an included angle of an axial direction of the corresponding supporting member 21 with respect to a vertical plane can be changed by the driving part 22, so as to change an included angle of the downhole seismograph 6 with respect to a plumb plane. Specifically, the driving member 22 may drive the top end of the supporting member 21 to move in the radial direction of the top plate 1, or the driving member 22 may rotate the top end of the supporting member 21 without changing the position of the top end of the supporting member 21 in the radial direction of the top plate 1.

In some embodiments, each of the supporting members 21 in the angle adjusting assembly 2 has the same structure and includes a plurality of rods 211 pivotally connected to each other, and the bottom end of the rod located at the bottom is rigidly connected to the top of the downhole seismograph 6 through a connecting member 5, specifically, one end of the connecting member 5 is pivotally connected to the bottom end of the rod located at the bottom, and the other end of the connecting member 5 is rigidly connected to the downhole seismograph 6.

In some embodiments, the inclinometer 3 is rigidly connected with the downhole seismograph 6 through the connecting piece 5, so that the measurement of the inclination angle of the downhole seismograph can be realized. The measured inclination angle is transmitted to the controller 4 on the ground through a cable, the inclination degree and the direction of the downhole seismograph 6 are judged according to the inclination angle condition, and then the controller 4 adjusts the opening degree of the support piece 21 through the driving part 22, so that the centralizing effect is achieved.

In some embodiments, in order to ensure that the centralizer of the embodiments of the present disclosure meets the installation requirement of drilling (the diameter of a drilled well where the centralizer is suitable for installation is 90mm to 250mm), when the downhole strong vibration instrument 6 is in the downhole installation stage, the outer diameter of the whole centralizer does not exceed the outer diameter of the downhole strong vibration instrument 6, and the outer diameter of the downhole strong vibration instrument is 70 mm to 110 mm; when the downhole seismograph 6 reaches a specified depth, the angle of each support 21 is adjusted to centralise the downhole seismograph 6, at which stage the outer diameter of the overall centraliser is between the outer diameter of the downhole seismograph 6 and the inner diameter of the borehole 7.

The working process of the centralizer disclosed by the embodiment of the disclosure is as follows:

referring to fig. 2 (a), in the descending stage of the downhole strong seismograph 6, each support 21 is in a straight state (i.e. an initial state) under the action of the gravity of the downhole strong seismograph 6, and the maximum outer diameter of the whole centralizer is 90mm and is consistent with the outer diameter of the downhole strong seismograph 6, so that a drilled well with the diameter larger than 90mm can be smoothly put down. The process can be realized only by the self gravity of the underground strong vibration instrument 6 without any electronic control equipment, and the operation is simple and the reliability is high.

When the underground strong seismograph 6 reaches the bottom of the well 7 and contacts with rock or sandy soil at the bottom of the well, because the gravity of the underground strong seismograph 6 is offset with the supporting force at the bottom of the well, each supporting piece 21 extends outwards under the action of the top plate 1 and the gravity of the supporting piece, so that the outer diameter of the whole centralizer is increased until each supporting piece 21 is expanded to be consistent with the diameter of the well, and at the moment, each supporting piece 21 is supported on the wall of the well to play a role in fixing the underground strong seismograph 6. However, since the borehole wall may have a certain inclination and is not completely vertical, the downhole seismograph 6 may have a certain inclination and is not vertical.

Because the downhole strong seismograph 6 has a certain inclination angle, the inclination state of the downhole strong seismograph 6 needs to be further adjusted to realize accurate underground righting. Firstly, the controller reads the reading of the inclinometer 3, adjusts the driving motor according to the reading of the inclinometer 3, and controls the opening of the corresponding support piece 21 to change, thereby reducing the inclination angle of the downhole seismograph 6. Such as: referring to fig. 2 (b), when the readings of the inclinometer 3 show that the downhole seismograph 6 inclines to the right (the left side is high and the right side is low), the opening degree of the left side supporting piece is increased and the opening degree of the right side supporting piece is reduced through the driving motor, and the readings of the inclination angles in the left and right directions can be zero through slow adjustment. By repeatedly reading the readings of the inclinometer and controlling the opening of the supporting piece by using the driving motor, the readings in two directions of the inclinometer can be zero, and at the moment, the accurate righting of the underground strong seismograph 6 is realized, which is shown in (c) of fig. 2.

In summary, the centralizer suitable for the downhole strong vibration instrument provided by the embodiment of the disclosure can accurately judge the inclination condition of the downhole strong vibration instrument, and utilize the driving part to control the opening degree of the supporting piece to centralize the downhole strong vibration instrument, and cannot influence the measurement of the downhole strong vibration instrument, thereby finally realizing the accurate centralization of the downhole strong vibration instrument.