CN208459608U - A kind of micro-earthquake monitoring system - Google Patents

A kind of micro-earthquake monitoring system Download PDF

Info

Publication number
CN208459608U
CN208459608U CN201820789306.3U CN201820789306U CN208459608U CN 208459608 U CN208459608 U CN 208459608U CN 201820789306 U CN201820789306 U CN 201820789306U CN 208459608 U CN208459608 U CN 208459608U
Authority
CN
China
Prior art keywords
protection cylinder
micro
monitoring system
wave detector
earthquake monitoring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201820789306.3U
Other languages
Chinese (zh)
Inventor
温红磊
齐玲玲
陈晓
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tianjin Shidatong Fang New Energy Technology Co Ltd
Original Assignee
Tianjin Shidatong Fang New Energy Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tianjin Shidatong Fang New Energy Technology Co Ltd filed Critical Tianjin Shidatong Fang New Energy Technology Co Ltd
Priority to CN201820789306.3U priority Critical patent/CN208459608U/en
Application granted granted Critical
Publication of CN208459608U publication Critical patent/CN208459608U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model relates to micro-seismic monitoring fields; more particularly to a kind of micro-earthquake monitoring system; including the position sensor, string, multiple lifting controllers for being in concatenated protection cylinder and being mounted on lifting traction mechanism being embedded on the inner wall of monitoring well, each protection cylinder is sheathed on respectively outside each wave detector on string;It further include electric capstan;The position sensor and the electric capstan are electrically connected to the lifting controller.The micro-earthquake monitoring system of the utility model, including the position sensor enable the protection cylinder and the wave detector to rest on fracturing section; improve the measurement accuracy of wave detector; further include the protection cylinder, the wave detector is prevented to be damaged, further increases the measurement accuracy of wave detector.

Description

A kind of micro-earthquake monitoring system
Technical field
The utility model relates to micro-seismic monitoring field more particularly to a kind of micro-earthquake monitoring systems.
Background technique
Microseismic is by observing, analyzing by leading to rock rupture when the petroleum works operation such as pressure break, water filling Or microseism signal caused by dislocation, monitor the geophysical techniques of subsurface rock rupture, fracture spaces spread.Microseism prison Survey technology is capable of length, height, width, orientation, inclination angle, the reservoir reconstruction volume etc. of real-time monitoring fracturing fracture, is to compare at present Compared with a kind of effective, the highest induced fracture monitoring technology of reliability.The technology has been obtained widely in external pressing crack construction Use, now at home also gradually attempt.
Currently used micro-seismic monitoring mode is underground micro-seismic monitoring: by being put into one under offset well (or fractured well) Group wave detector, the micro-seismic event formed to fracture open in fracturing process receive, and transfer data to ground, then right Data are handled distribution of the focus in space to determine microseism, with hypocenter distributing figure can explain pressure break seam it is high, Seam length and orientation.Monitoring mode monitoring effect is especially good in more well combination wells, such as 3 groups of model phases of tripping in 3 mouthfuls of monitoring wells Same wave detector, every group 12 grades, 3 groups of wave detectors are connected to 3 distinct interfaces of same acquisition system, acquisition system is certainly by 3 optical cables Band GPS synchronizing software, synchronizes 3 optical cable clocks, same acquisition system can remember the 3 same file formats of well data Record.
However, underground monitoring field operation requires the stop place of wave detector: inspection well and monitoring well distance principle On do not exceed 500m, precisely underground microseism acquisition receive wave detector installation site and fracturing section horizontal distance cannot More than 500m, and substantially in sustained height, such as distance is no more than 100m up and down.
In addition, wave detector transfer to monitoring well and from monitoring well out during, multiple strings are associated in optical cable On, it shakes seriously, is easier to bump against on barrier so as to cause wave detector, so that wave detector is damaged, will lead to detection Device monitors inaccurate even wave detector and cannot use.
Therefore, it is necessary to a kind of micro-earthquake monitoring systems.
Utility model content
The purpose of the utility model is to provide a kind of micro-earthquake monitoring systems, it can be ensured that the protection cylinder rests on pressure break Section and prevent the wave detector to be damaged, improve the measurement accuracy of wave detector.
The utility model provides a kind of micro-earthquake monitoring system, including the position sensing being embedded on the inner wall of monitoring well Device, string, multiple lifting controllers for being in concatenated protection cylinder and being mounted on lifting traction mechanism, each protection Cylinder is sheathed on respectively outside each wave detector on string;It further include electric capstan, which is connected by drawing cable It connects on the protection cylinder for being located at the top;Multiple walking mechanisms are mounted on the outer wall of each protection cylinder;It is each described It protects and is laid with anticollision buffer layer on the inner wall of cylinder;The position sensor and the electric capstan are electrically connected to the liter Drop controller.
Further, the micro-earthquake monitoring system, further includes: be mounted on each wave detector of the string First Speed sensor and be mounted on it is each it is described protection cylinder on second speed sensor, each First Speed sensor and Each second speed sensor is electrically connected to the lifting controller.
Further, it is spaced and is enclosed equipped with multiple position sensings on the inner wall same level direction of the monitoring well Device.
Further, multiple First Speed sensors are installed on each wave detector.
Further, multiple second speed sensors are installed on each protection cylinder.
Further, multiple electric capstans are uniformly distributed along monitoring well head, are arranged on each electric capstan The drawing cable;Each drawing cable is correspondingly connected on the barrel of the protection cylinder for being located at the top, and multiple The drawing cable is uniformly distributed connection along the upper end nozzle week edge of the protection cylinder.
Further, the walking mechanism includes the support limit bar being connected on the protection drum outer wall, is sheathed on this Buffer spring outside support limit bar;Described buffer spring one end is connect with the protection drum outer wall, and the other end is connected with installation Plate is equipped with idler wheel on the mounting plate, and buffer space is equipped between the end and the mounting plate of the support limit bar.
Further, the protection cylinder material uses zn-ni alloy deposits steel.
Further, the drawing cable is wirerope.
Further, the anticollision buffer layer includes rubber layer and the adhesive layer that is layed in the rubber layer, the rubber Glue-line is Nian Jie with the protection inner wall of cylinder by the adhesive layer.
The utility model has the following beneficial effects:
1. the micro-earthquake monitoring system of the utility model including the position sensor being mounted in monitoring well and is mounted on The lifting controller on traction mechanism is gone up and down, when the protection cylinder reaches the position of the position sensor, the position is passed Sensor sends arriving signal to the lifting controller, and the lifting controller sends stop signal to the electric capstan, makes Fracturing section can be rested on by obtaining the protection cylinder, thus, the wave detector can rest on fracturing section, improve the measurement of wave detector Precision.
2. the micro-earthquake monitoring system of the utility model, including be mounted on each wave detector of the string One velocity sensor and the second speed sensor being mounted on each protection cylinder, each First Speed sensor and each The second speed sensor is electrically connected to the lifting controller, First Speed described in the lifting controller real-time reception First Speed data-signal and second speed data-signal that sensor and the second speed sensor are sent respectively simultaneously carry out Comparison sends revolving speed adjustment signal to the electric capstan in First Speed data and inconsistent second speed data, so that The protection cylinder is consistent with the wave detector speed.
3. multiple walking mechanisms are mounted on the outer wall of each protection cylinder of the utility model, so that the protection cylinder Transferred to together with wave detector monitoring well and from monitoring well out during it is more smooth.
4. the lifting traction mechanism of the utility model include along the equally distributed multiple electric capstans of well head, it is each described The drawing cable is arranged on electric capstan, the drawing cable is distributed along the protection drum outer wall even circumferential, so that The tractive force of the protection cylinder is uniformly distributed, the traction force on each drawing cable is identical, so that the liter of the protection cylinder Drop process is very stable.
Detailed description of the invention
Fig. 1 is the main view of the micro-earthquake monitoring system of the utility model;
Fig. 2 is the left view of the micro-earthquake monitoring system of the utility model;
Fig. 3 is the main view (cross-sectional view) of the protection cylinder of the utility model;
Fig. 4 is the schematic diagram (cross-sectional view) of the wave detector and protection cylinder of the utility model in monitoring well;
Fig. 5 is the circuit diagram of the micro-earthquake monitoring system of the utility model.
Label in attached drawing are as follows: protection cylinder -1, capstan winch ontology -2, capstan winch support rod -3, drawing cable -4, capstan winch transmission Axis -5, monitoring well -6, motor -7, motor support frame -8, wave detector cable -9, wave detector -10, idler wheel -11, rolling wheel support side Plate -12, anticollision buffer layer -14, idler wheel transmission shaft -15, support limit bar -16, buffer spring -17, delays protection cylinder ontology -13 Punching interval -18, mounting plate -19, position sensor -20, second speed sensor -21, First Speed sensor -22, lifting control Device -23 processed.
Specific embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described Embodiment is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, originally Field those of ordinary skill every other embodiment obtained without making creative work belongs to practical Novel protected range.
It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only For ease of description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have it is specific Orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.In addition, term " the One ", " second ", " third " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally Connection;It can be mechanical connection, be also possible to be electrically connected;Can be directly connected, can also indirectly connected through an intermediary, It can be the connection inside two elements.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition The concrete meaning of language in the present invention.
Referring to Fig. 1, micro-earthquake monitoring system provided by the utility model, the position on the inner wall including being embedded in monitoring well 6 Set sensor 20, string, multiple lifting controllers for being in concatenated protection cylinder 1 and being mounted on lifting traction mechanism 23, each protection cylinder is sheathed on respectively outside each wave detector on string;It further include electric capstan, the electric capstan is logical Drawing cable 4 is crossed to be connected on the protection cylinder of the top;Multiple rows are mounted on the outer wall of each protection cylinder Walk mechanism;Anticollision buffer layer 14 is laid on the inner wall of each protection cylinder;The position sensor and lifting traction Mechanism is electrically connected to the lifting controller.The micro-earthquake monitoring system of the utility model, including being mounted in monitoring well Position sensor and the lifting controller being mounted on lifting traction mechanism reach the position sensor in the protection cylinder Position when, the position sensor sends arriving signal to the lifting controller, and the lifting controller is to described electronic Capstan winch sends stop signal, and the protection cylinder is enabled to rest on fracturing section, thus, the wave detector can rest on pressure break Section, improves the measurement accuracy of wave detector.Multiple walking mechanisms are mounted on the outer wall of each protection cylinder of the utility model, So that the protection cylinder transferred to together with wave detector monitoring well and from monitoring well out during it is more smooth.
Referring to fig. 2, the electric capstan includes capstan winch ontology 2, and capstan winch transmission shaft 5 is used to support the capstan winch transmission shaft The capstan winch support rod 3 of one end, the capstan winch transmission shaft other end is connect with motor 7, for carrying the motor support of the motor Frame 8, so that the capstan winch transmission shaft passes through the capstan winch ontology and the motor.The model YCT-112-4A of the motor.
Referring to Fig. 3, the walking mechanism includes the support limit bar 16 being connected on the protection drum outer wall, is sheathed on this Buffer spring 17 outside support limit bar;Described buffer spring one end is connect with the protection drum outer wall, and the other end is connected with peace Loading board 19 is equipped with the rolling wheel support side plate 12 being arranged in pairs on the mounting plate, is provided between the two rolling wheel support side plates Idler wheel transmission shaft 15 is equipped with idler wheel 11, the end of the support limit bar and the mounting plate between the idler wheel transmission shaft Between be equipped with buffer space 18.The rotation direction of the idler wheel and the short transverse of the protection cylinder are tangent.In the utility model The walking mechanism includes the support limit bar and the buffer spring that is sheathed on outside the support limit bar, on the one hand, described slow It, can be by compressing the buffer spring when rushing spring the idler wheel being made to encounter barrier in rolling process in the monitoring well The idler wheel is set to slip over barrier, on the other hand, the support limit bar is used to support the buffer spring, in order to avoid the buffering Camber of spring.
Referring to Fig. 3 and Fig. 4, the protection cylinder includes protection cylinder staving 13 and the anticollision buffer layer.The anticollision buffering Layer includes rubber layer and the adhesive layer being layed in the rubber layer, and the rubber layer passes through the adhesive layer and the protection cylinder Inner wall bonding.Optionally, the anticollision buffer layer includes fibrous layer and the adhesive layer that is layed on the fibrous layer, the fibre It is Nian Jie with the protection inner wall of cylinder by the adhesive layer to tie up layer.The protection cylinder material uses zn-ni alloy deposits steel, Anticorrosive property is strong.Referring to fig. 4, the internal diameter of the protection cylinder is bigger than the outer diameter of the wave detector, and the outer diameter of the protection cylinder is than prison It logs well 6 small.
Referring to Fig. 1 and Fig. 4, the micro-earthquake monitoring system, further includes: be mounted on each wave detector of the string On First Speed sensor 22 and be mounted on it is each it is described protection cylinder on second speed sensor 21, each First Speed Sensor and each second speed sensor are electrically connected to the lifting controller.The micro-seismic monitoring system of the utility model System, including the First Speed sensor being mounted on each wave detector of the string and is mounted on each protection cylinder On second speed sensor, each First Speed sensor and each second speed sensor are electrically connected to the liter Drop controller, First Speed sensor and the second speed sensor described in the lifting controller real-time reception are sent respectively First Speed data-signal and second speed data-signal and compare, First Speed data and second speed data not When consistent, revolving speed adjustment signal is sent to the electric capstan, so that the protection cylinder is consistent with the wave detector speed.
Referring to Fig. 1 and Fig. 4, interval is enclosed on the inner wall same level direction of the monitoring well passes equipped with multiple positions Sensor, the position sensor on the inner wall same level direction to prevent the monitoring well breaks down, to send mistake True data signal.
Referring to fig. 4, multiple First Speed sensors are installed, to prevent on the wave detector on each wave detector The First Speed sensor breaks down, to send distorted data signals.
Referring to Fig. 1 and Fig. 4, multiple second speed sensors are installed on each protection cylinder, to prevent the protection The second speed sensor on cylinder breaks down, to send distorted data signals.
Referring to Fig. 1 and Fig. 4, the walking mechanism is uniformly alternatively arranged on the protection drum outer wall along short transverse.Institute The axis direction for stating the direction of travel and the protection cylinder of walking mechanism is consistent.
Referring to fig. 4, multiple electric capstans are uniformly distributed along monitoring well heads, and equal winding has been on each electric capstan State drawing cable;Each drawing cable is correspondingly connected on the barrel of the protection cylinder for being located at the top, and multiple institutes It states drawing cable and is uniformly distributed connection along the upper end nozzle week edge of the protection cylinder.The drawing cable can be wirerope, excellent Phosphorized coating steel wire rope is selected, for phosphorized coating steel wire rope than bright wire rope long service life, use cost is lower, and stability is more It is good, more preferable manganese-series phosphorized Coated Wirerope, this is because manganese-series phosphorized Coated Wirerope fatigue life is same structure plain bar 3-4 times of cord.The lifting traction mechanism of the utility model includes along the equally distributed multiple electric capstans of well head, each institute It states and is arranged with the drawing cable on electric capstan, the drawing cable is distributed along the protection drum outer wall even circumferential, is made It obtaining and the tractive force of the protection cylinder is uniformly distributed, the traction force on each drawing cable is identical, so that the protection cylinder Lifting process is very stable.
Referring to Fig. 5, the position sensor, the First Speed sensor, the second speed sensor and the electricity Dynamic capstan winch, which passes through, is wirelessly or non-wirelessly electrically connected to the lifting controller.The model AMN32 of the position sensor, it is described The model SCA1000-D01 of First Speed sensor, the model SCA1000-D01 of the second speed sensor, it is described The model ATA3741 of lifting controller.
It is the position sensor, the First Speed sensor, the second speed sensor in the present embodiment, described Electric capstan and the lifting controller, the structure and function of itself are the prior arts, and details are not described herein again, this is practical new Type is intended to protect the type of attachment between above-mentioned each device.
The working principle of the micro-earthquake monitoring system of the utility model is as follows.
According to the cascade of the wave detector such as wave detector series connection protection cylinder;
Concatenated protection cylinder is transferred into installation site sensor in micro-seismic monitoring well in advance using the electric capstan Initial position, when the protection cylinder reaches the position of the position sensor, the position sensor is controlled to the lifting Device processed sends arriving signal, and the lifting controller sends stop signal to the motor;
It, will be under concatenated wave detector when the position sensor detects that multiple protection cylinders are transferred to initial position It is put into the initial position;
Start the motor and transfer concatenated protection cylinder according to predetermined speed, and transfers concatenated inspection according to the predetermined speed Wave device;
First Speed sensor described in the lifting controller real-time reception and the second speed sensor are sent respectively First Speed data-signal and second speed data-signal and compare, First Speed data and second speed data not When consistent, revolving speed adjustment signal is sent to the electric capstan;
The electric capstan adjusts revolving speed in real time, so that First Speed data and second speed data are consistent;
When multiple protection cylinders are transferred to the final position of installation site sensor, the final position and fracturing section Substantially in sustained height, starts the motor and act the protection cylinder;
The wave detector is monitored fracturing section.
Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the utility model, rather than it is limited System;Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should Understand: it is still possible to modify the technical solutions described in the foregoing embodiments, or to some or all of Technical characteristic is equivalently replaced;And these are modified or replaceed, it does not separate the essence of the corresponding technical solution, and this is practical new The range of each embodiment technical solution of type.

Claims (10)

1. a kind of micro-earthquake monitoring system, which is characterized in that including be embedded on the inner wall of monitoring well position sensor, detection Device string, multiple lifting controllers for being in concatenated protection cylinder and being mounted on lifting traction mechanism, each protection cylinder difference It is sheathed on outside each wave detector on string;It further include electric capstan, which is connected to position by pulling cable In on the protection cylinder of the top;Multiple walking mechanisms are mounted on the outer wall of each protection cylinder;Each protection cylinder Inner wall on be laid with anticollision buffer layer;The position sensor and the electric capstan are electrically connected to the elevating control Device.
2. micro-earthquake monitoring system according to claim 1, which is characterized in that further include: it is mounted on the string Each wave detector on First Speed sensor and the second speed sensor that is mounted on each protection cylinder, it is each described First Speed sensor and each second speed sensor are electrically connected to the lifting controller.
3. micro-earthquake monitoring system according to claim 2, which is characterized in that in the inner wall same level of the monitoring well Interval is enclosed equipped with multiple position sensors on direction.
4. micro-earthquake monitoring system according to claim 3, which is characterized in that installed on each wave detector multiple described First Speed sensor.
5. micro-earthquake monitoring system according to claim 4, which is characterized in that installed on each protection cylinder multiple described Second speed sensor.
6. micro-earthquake monitoring system according to claim 5, which is characterized in that multiple electric capstans are along monitoring well head It is uniformly distributed, the drawing cable is arranged on each electric capstan;Each drawing cable, which is correspondingly connected with, to be located at On the barrel of the protection cylinder of the top, and multiple drawing cables divide along the upper end nozzle week of the protection cylinder along uniform Cloth connection.
7. micro-earthquake monitoring system according to claim 6, which is characterized in that the walking mechanism is described including being connected to Protect the support limit bar on drum outer wall, the buffer spring being sheathed on outside the support limit bar;Described buffer spring one end and institute Protection drum outer wall connection is stated, the other end is connected with mounting plate;Idler wheel, the end of the support limit bar are installed on the mounting plate Buffer space is equipped between the mounting plate.
8. micro-earthquake monitoring system according to claim 7, which is characterized in that the protection cylinder material uses admiro Coating steel.
9. micro-earthquake monitoring system according to claim 8, which is characterized in that the drawing cable is wirerope.
10. micro-earthquake monitoring system according to claim 9, which is characterized in that the anticollision buffer layer includes rubber layer With the adhesive layer being layed in the rubber layer, it is Nian Jie with the protection inner wall of cylinder that the rubber layer passes through the adhesive layer.
CN201820789306.3U 2018-05-24 2018-05-24 A kind of micro-earthquake monitoring system Expired - Fee Related CN208459608U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201820789306.3U CN208459608U (en) 2018-05-24 2018-05-24 A kind of micro-earthquake monitoring system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201820789306.3U CN208459608U (en) 2018-05-24 2018-05-24 A kind of micro-earthquake monitoring system

Publications (1)

Publication Number Publication Date
CN208459608U true CN208459608U (en) 2019-02-01

Family

ID=65150103

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201820789306.3U Expired - Fee Related CN208459608U (en) 2018-05-24 2018-05-24 A kind of micro-earthquake monitoring system

Country Status (1)

Country Link
CN (1) CN208459608U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112878397A (en) * 2021-03-10 2021-06-01 中国科学院武汉岩土力学研究所 Use method of deep layer load test equipment in open caisson construction period

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112878397A (en) * 2021-03-10 2021-06-01 中国科学院武汉岩土力学研究所 Use method of deep layer load test equipment in open caisson construction period

Similar Documents

Publication Publication Date Title
CN110318795B (en) Coal mine tunnel surrounding rock deformation characteristic combined monitoring system and monitoring method
US9494461B2 (en) Detecting broadside acoustic signals with a fiber optical distrubuted acoustic sensing (DAS) assembly
CN103528530B (en) A kind of mining optical fiber grating roof abscission layer monitoring device and monitoring method
KR102082238B1 (en) Displacement Measuring Apparatus Having Transformable Sensor Case, Apparatus for Measuring Rail Displacements and System for Measuring Displacements Using the Same
CN106759548B (en) Monitoring system and monitoring method for grid anchor rod support cutting
CN207395935U (en) A kind of bump on-line monitoring system based on fiber grating sensing technology
CN110206538A (en) The armoured fiber optic cable positioning and orientation system of casing and its collecting method
CN107620260B (en) A kind of Arch Bridge Construction cable crane pylon displacement control system and application method
CN208459608U (en) A kind of micro-earthquake monitoring system
CN113568037A (en) Earthquake and geological disaster monitoring system and method based on optical fiber sensing technology
CN110454150A (en) The armoured optical cable orientation system of casing and collecting method based on electromagnetic induction
CN108917998A (en) A kind of monitoring method and system using ultrasonic echo monitoring surrouding rock stress state
CN111335954A (en) Rock burst monitoring system based on distributed optical fiber sensing and data acquisition and processing method
US8353205B2 (en) Measuring apparatus with AE sensor, installing method thereof, and set of the measuring apparatus
CN208183704U (en) The safety pre-warning system in tunnel portal slope construction stage
CN102562043B (en) Device for underground detecting sand production of oil well
CN208533368U (en) A kind of parallel steel wire intelligence rope suitable for suspension cable, suspension cable and sunpender rope
CN113587985A (en) Steel cable type roadway surrounding rock convergence monitoring device and monitoring method
CN110529103B (en) External-sleeve armored optical cable orientation system with built-in controllable sound source and data acquisition method
US9416641B2 (en) Borehole microseismic systems and methods
CN112762844A (en) Pier dashes silt safety monitoring system
CN104654996A (en) Underground measurement device for mountain fissures
CN208459605U (en) A kind of micro-earthquake monitoring system
CN217818689U (en) Tunnel surrounding rock cross section deformation acquisition device, detection system and automatic early warning system
CN107304673A (en) Oil/gas Well monitors tubing string

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20190201

Termination date: 20190524