CN217354347U - Multistage micro-seismic digital borehole geophone device - Google Patents

Abstract

The utility model discloses a detector device in multistage microseism digital well, include: the device comprises a ground control unit, a cable, a torpedo connector and a plurality of stages of digital in-well wave detectors, wherein each stage of digital in-well wave detector comprises a pushing driving assembly, a pushing action assembly and an electronic instrument assembly. The ground control unit is used for supplying power to the multi-stage digital well detector, sending a control command to each stage of well detector and storing data acquired by each stage. The cable is used for power supply, communication and interaction between the surface control unit and the multi-stage digital borehole geophone. The torpedo connector is used for being matched with a cable and connecting the detectors in all levels of digital wells. The multistage digital borehole geophone is mainly responsible for microseism signal acquisition and transmission work. Each stage of wave detector in the digital well comprises a pushing driving assembly and a pushing action assembly, and the pushing structure has the advantages of stability, reliability, simple structure, accurate action, wide application range and convenience in installation and maintenance.

Description

Multistage micro-seismic digital borehole geophone device

Technical Field

The utility model relates to a microseism monitoring technology field, more specifically say, relate to a detector device in multistage microseism digital well.

Background

Rock fractures and seismic activity that occur during deep mining in mines and fracturing of oil wells are commonly referred to as microseismic events. The seismic waves of such small earthquakes, i.e. micro-seismic events, are collected by a ground or well detector, and then are processed and interpreted, so that the fracture positions of underground rocks, the fracture geometry and the like can be known, and the technology is called micro-seismic monitoring technology. The method has the advantages of flexibility, rapidness, simplicity and convenience, but the signal-to-noise ratio of the data is not high due to the fact that the acquired data is absorbed by a stratum and is seriously interfered by environmental noise. The underground monitoring method mainly adopts VSP technical data acquisition equipment at present, the equipment is placed in a well to monitor the microseism event, and the detector is placed in the stratum, so that the uplink longitudinal wave and the uplink converted wave can be received, the downlink longitudinal wave and the downlink converted wave can also be received, the influence of ground environment noise is avoided, and the acquired data quality is high.

The existing VSP technology data acquisition equipment mainly adopts a moving coil sensor as a sensing end of a microseism signal, and the conventional moving coil sensor is relatively narrow in frequency band range and wide in frequency band range and high in price. Moreover, because the borehole geophone acquires seismic waves underground, the coupling of the geophone and the geophone affects the quality of acquired microseismic signals, and therefore the borehole geophone needs to be stably pushed against the borehole wall.

The current developed seismic well geophone pushing device mainly comprises an air bag pushing type, an electromagnetic relay elastic arm type, an air cylinder mechanical pushing arm type and a hydraulic cylinder mechanical pushing arm type. The air bag pushing type air bag is easy to damage, and in addition, in water, the pushing force is weak under the influence of water pressure; the elastic arm type structure of the electromagnetic relay is complex, and the electromagnetic relay can only push the push arm open and cannot be retracted, so that the well clamping condition is easy to occur; the two kinds of machinery of cylinder, pneumatic cylinder push away the arm formula and mainly convert atmospheric pressure or hydraulic pressure into mechanical energy to the arm action is leaned on in the drive, and atmospheric pressure hydraulic equipment needs to pay attention to in time protection and maintenance in the use, and the maintenance is troublesome relatively and with high costs, uses or maintains the improper gas leakage oil leak condition of causing easily, influences the drive effect, leads to pushing away to be unstable. Meanwhile, a motor single-pushing-arm mode is adopted, the single-pushing-arm mode is limited by the length of the pushing arm, and for a well with a small well diameter, pushing force is insufficient, so that the wave detector in the well cannot be stably pushed against the well wall. For a well with a larger borehole diameter, the wave detector in the well cannot be pushed against the borehole wall under the influence of the length of the pushing arm and the pushing distance, so that the monitoring requirement in the well cannot be met.

Therefore, the development of the borehole geophone device with high frequency band range, high sensitivity, stable and reliable pushing structure, simple structure, accurate action and wide application range has very important significance for monitoring in the microseism well.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a ware device is examined in multistage microseism digital well, its concrete technical scheme as follows:

a multi-stage microseismic digital borehole geophone apparatus comprising: the system comprises a ground control unit, a cable, a torpedo connector and a plurality of stages of digital borehole geophones; the torpedo connector is divided into a needle torpedo connector and a hole torpedo connector, two ends of the needle torpedo connector and two ends of the hole torpedo connector are respectively a cable connecting end and a wave detector connecting end, the needle torpedo wave detector connecting end can be connected with a torpedo socket hole of the in-well wave detector arranged at the top end of the in-well wave detector in each level of digital well, and the hole torpedo wave detector connecting end can be connected with a torpedo socket needle of the in-well wave detector arranged at the bottom end of the in-well wave detector in each level of digital well; the ground control unit is connected with a cable connecting end of the Golay connector through a cable, the Golay connector is connected with a Torpedo socket hole of the in-well detector of the first-stage digital in-well detector, a Torpedo socket needle of the in-well detector of the first-stage digital in-well detector is connected with the in-well detector of the second-stage digital in-well through the Torpedo connector, the cable and the Golay connector, and by analogy, the detectors in the two adjacent stages of digital in-well are connected according to the connection mode of the in-well detectors of the first-stage and the second-stage;

each stage of digital borehole wave detector comprises a pushing driving component, a pushing action component and an electronic instrument component;

the pushing driving assembly comprises a pushing driving part shell, the top end of the pushing driving part shell is connected with a torpedo socket hole of the wave detector in the well through an upper torpedo socket, and the bottom end of the pushing driving part shell is connected with the pushing action assembly; a motor circuit bin is arranged above the inner part of the shell of the pushing driving part, a motor connecting shell connected with the motor circuit bin is arranged below the shell of the pushing driving part, a motor control circuit board for controlling the starting and stopping, the forward and reverse rotation and the current detection of a driving motor is arranged in the motor circuit bin, a driving motor is arranged in the motor connecting shell, the bottom end of the motor connecting shell and one end of the driving motor, which extends out of an output shaft, are fixedly connected with a motor connecting flange together, a coupler is arranged in the motor connecting flange, one end of the coupler is connected with the output shaft of the driving motor, and the other end of the coupler is connected with a motor connecting shaft; the middle part of the motor connecting shaft is provided with an external thread;

the pushing action component comprises a pushing shell, a force transmission nut, a pushing arm seat block, a tension spring, a connecting rod, a pushing arm, a limiting groove and a limiting screw pin; the upper end of the pushing shell is connected with a pushing shell upper joint, the lower end of the pushing shell upper joint is connected with a pushing shell lower joint, and the pushing shell upper joint is fixedly connected with a motor connecting flange and the bottom end of a pushing drive part shell; the motor connecting shaft extends into the pushing shell, the force transmission nut and the pushing arm seat block are screwed on the motor connecting shaft in an inner hole thread form, and the upper end and the lower end of the tension spring are respectively connected with the force transmission nut and the pushing arm seat block in a thread form; two sides of the pushing arm seat block are respectively hinged with a connecting straight rod, the other ends of the two connecting straight rods are respectively hinged with the middle of the corresponding pushing arm, and the top ends of the two pushing arms are hinged with the pushing shell; a limit groove which is parallel to the axial direction of the pushing shell is formed in the pushing shell, a limit screw pin is vertically fixed on the force transmission nut, and the free end of the limit screw pin extends outwards into the limit groove;

the electronic instrument assembly comprises an electronic instrument shell, the top end of the electronic instrument shell is connected with the lower connector of the pushing shell, and the bottom end of the electronic instrument shell is connected with the torpedo socket needle of the wave detector in the well through a lower torpedo socket; a circuit framework and a three-component sensor support are arranged in an electronic instrument shell, a power supply circuit board, a collecting circuit board and a communication circuit board are respectively installed and fixed on the circuit framework, a three-component digital sensor circuit board is installed and fixed on the three-component sensor support, and the three-component sensor support is installed and fixed on the circuit framework.

By adopting the technical scheme, the utility model discloses wave detector device in multistage microseism digital well includes: the device comprises a ground control unit, a cable, a torpedo connector and a plurality of stages of digital in-well wave detectors, wherein each stage of digital in-well wave detector comprises a pushing driving assembly, a pushing action assembly and an electronic instrument assembly. The ground control unit is used for supplying power to the multi-stage digital well detector, sending a control command to each stage of well detector and storing data acquired by each stage. The cable is used for power supply, communication and interaction between the surface control unit and the multi-stage digital borehole geophone. The torpedo connector is used for being matched with a cable and connecting the detectors in all levels of digital wells. The multistage digital borehole geophone is mainly responsible for microseism signal acquisition and transmission work.

Meanwhile, each level of digital in-well detector comprises a pushing driving assembly and a pushing action assembly, the structure has the advantages of stability, reliability, simple structure, accurate action, wide application range and convenience in installation and maintenance, and the pushing folding and unfolding of the pushing arm can be guaranteed through the control of the driving motor, and the accuracy and flexibility of the action of the pushing arm can also be guaranteed.

The utility model discloses wave detector device in multistage micro-seismic digital well can be used to oil field or coal bed gas hydraulic fracturing, oil gas is adopted, the monitoring that the underground stress field that arouses when petroleum engineering operations such as conventional water injection, gas injection and heat are driven changes, through the micro-seismic event that monitoring rock fracture produced, confirm the seismic source position, send out the shake moment, seismic source intensity to the depicting crack development condition and reservoir fluid motion condition, the accurate surplus oil gas of understanding and mastering goes to, improve the productivity. The method can also be applied to mine dynamic disaster monitoring, the rock can break under the action of high stress in the mine exploitation process, the crack is expanded and communicated to easily cause local instability of the rock, and the earthquake activities of different seismic levels generated by rock breakage are monitored, so that the positioning and energy calculation of the earthquake activities are carried out, the position and the breakage degree of the rock breakage are obtained, and basic data and guarantee are provided for mine dynamic disaster evaluation and early warning.

Preferably, the ground control unit comprises a computer which is responsible for sending various control commands to the wave detector in each level of digital well by using the matched software and storing the data acquired and transmitted by the wave detector in each level of digital well; and the control cabinet is used for supplying power to the detector in each level of digital well through the switching power supply, and communicating with the detector in the digital well by using the high-speed communication module, and the control cabinet is also integrated with a GPS module for realizing synchronous acquisition of the detector in each level of digital well.

Preferably, the cable adopts a conventional seven-core logging cable, six cores are used, two cores are used for power supply, two cores are used for communication, and two cores are used for synchronous pulse acquisition and transmission.

Preferably, the connecting end of the Goldfish torpedo wave detector is a first connector consisting of a Torpfish socket needle and a Torpfish coupling cap, the first connector is screwed on the corresponding end of the Goldfish torpedo connector, and the Torpfish socket needle is fixed on the shell of the Goldfish torpedo connector through a set screw; the hole torpedo wave detector connecting end is a second connector composed of a torpedo socket hole and a fixing component, the second connector is screwed on the corresponding end of the hole torpedo connector, and the torpedo socket hole is fixed on the shell of the hole torpedo connector through a set screw.

Preferably, the cable connecting ends of the needle torpedo connector and the hole torpedo connector are fixed with cables by large, middle and small cone assemblies, and the large, middle and small cone assemblies are fixed on the shell of the corresponding torpedo connector by set screws through positioning holes in the cable connecting ends; and a spring for protecting the cable is arranged outside the cable connecting end.

Preferably, when construction operation is not carried out, a torpedo protective cap needs to be connected to each of the torpedo socket needle and the mine detector in the well, and a torpedo protective plug needs to be connected to each of the torpedo socket hole and the mine detector in the well.

Preferably, the pushing drive assembly further comprises an upper bearing and a lower bearing, the upper bearing is sleeved on the motor connecting shaft at a position close to one side of the coupler, the lower bearing is sleeved on the motor connecting shaft at a position far away from one side of the coupler, and the upper bearing and the lower bearing are respectively fixed inside the upper connector and the lower connector of the pushing shell.

Preferably, the connection between the connecting rod and the pushing arm seat block and the connection between the pushing arm and the pushing shell are both detachably connected.

Preferably, a digital MEMS acceleration sensor electrically connected with the three-component digital sensor circuit board is mounted on the three-component sensor bracket; an acquisition circuit on the acquisition circuit board is designed by adopting a 32-bit high-precision AD conversion chip; the communication circuit on the communication circuit board adopts the OFDM modulation technology, the modulation frequency band reaches 2-28MHz, and the relay mode is supported.

Preferably, two sides of the pushing arm seat block are respectively provided with a fixing pin hole, one end of each of the two connecting straight rods is respectively fixed on the fixing pin holes on the two sides of the pushing arm seat block through a fixing pin, the other end of each of the two connecting straight rods is respectively fixedly connected with the middle of each of the two pushing arms through a fixing pin, and the top ends of the two pushing arms are connected with the pushing shell through fixing pins.

Preferably, the drive motor is a brushless dc motor.

Preferably, the free ends of the two support arms are provided with a plurality of transverse grains.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic diagram of a downhole multi-stage digital borehole geophone connection.

Figure 2 is an isometric view of a detector in a single stage digital well.

Fig. 3 is an appearance structure schematic diagram of a detector in a single-stage digital well.

Fig. 4 is a schematic sectional view along the direction a-a in fig. 3.

Fig. 5 is an external structural view of the torpedo connector.

Fig. 6 is a schematic sectional view along the direction B-B in fig. 5.

In the figure: 1-ground control unit, 2-cable, 3-well wall, 4-digital well detector, 5-needle torpedo connector, 6-hole torpedo connector, 7-well detector torpedo socket hole, 8-well detector torpedo socket needle, 9-upper torpedo socket, 10-pushing drive part shell, 11-motor circuit cabin, 12-motor connection shell, 13-drive motor, 14-motor connection flange, 15-coupler, 16-upper bearing, 17-lower bearing, 18-pushing shell, 19-force transmission nut, 20-pushing arm seat block, 21-tension spring, 22-connecting rod, 23-pushing arm, 24-limiting groove, 25-limiting screw pin, 26-pushing shell upper joint, 27-pushing casing lower joint, 28-electronic instrument casing, 29-lower torpedo base, 30-circuit framework, 31-three-component sensor support, 32-torpedo socket needle, 33-torpedo socket hole, 34-large, medium and small cone component, 35-spring, 36-fixing pin, 37-socket component and 38-motor connecting shaft.

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.

In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Example (b):

as shown in fig. 1, the utility model relates to a wave detector device in multistage microseism digital well, include: a surface control unit 1, a cable 2, a torpedo connector and several stages of digital borehole geophones 4. A multi-stage digital borehole detector 4 is arranged underground to collect microseism signals and transmit the microseism signals in real time (A in figure 1 refers to the ground), each stage of detector is fixed on a borehole wall 3 through a pushing arm 23, all stages of detectors are connected with each other through a torpedo connector and a cable 2, and a first stage of detector is connected with a ground control unit 1 through the cable 2. The ground control unit 1 sends commands of instrument query, arm 23 pushing action, starting and suspending acquisition and the like to all levels of underground detectors through the cable 2. Each stage of detectors transmits the acquired micro seismic signals to the ground control unit 1 through the cable 2, and simultaneously has a local storage function, and the micro seismic data can be uploaded and displayed on matched software in real time and can also be stored in each detector.

In particular, the method comprises the following steps of,

as shown in fig. 1, 5 and 6, the torpedo connector is divided into a needle torpedo connector 5 and a hole torpedo connector 6, two ends of the needle torpedo connector 5 and the hole torpedo connector 6 are respectively a cable connecting end and a detector connecting end, the needle torpedo detector connecting end can be connected with a torpedo socket hole 7 of the in-well detector arranged at the top end of the detector 4 in each level of digital well, and the hole torpedo detector connecting end can be connected with a torpedo socket needle 8 of the in-well detector arranged at the bottom end of the detector 4 in each level of digital well.

The ground control unit 1 is connected with a cable connecting end of a needle fish torpedo connector 5 through a cable 2, the needle fish torpedo connector 5 is connected with a fish torpedo socket hole 7 of a fish torpedo in the digital well of a first-stage detector 4, a fish torpedo socket needle 8 of the fish torpedo in the digital well of the first-stage detector 4 is connected with a fish torpedo in the digital well of a second-stage detector 4 through a fish torpedo connector 6, the cable 2 and the fish torpedo connector 5, and so on, and the detectors 4 in the adjacent two stages of digital wells are connected according to the connection mode of the fish torpedo in the digital well of the first-stage detector 4 and the second-stage detector 4.

The utility model discloses in, ground control unit 1 includes the computer, the switch board, and the computer is responsible for utilizing supporting software to detect the ware 4 and send various control commands in every level digital well, including I P inquiry, push aside the arm and push away, push aside the arm and withdraw, push aside the arm stop motion, begin to gather, force the collection, stop the collection, the adjustment of magnification, draw commands such as wave form in real time, it is local to save the data that comes in the transmission with the ware 4 collection in every level digital well to the computer simultaneously. The control cabinet is responsible for supplying power for the detector 4 in each level of digital well through a switching power supply, and the high-speed communication module is used for communicating with the detector. The control cabinet is also integrated with a GPS module, and synchronous acquisition work of the detectors in each level of well is realized by using GPS second pulse signals.

The cable 2 adopts a conventional seven-core logging cable, six cores are used, two cores are used for power supply, two cores are used for communication, and two cores are used for synchronously acquiring pulses and sending the pulses.

In the utility model, the connecting end of the needle fish torpedo wave detector is a first joint composed of a torpedo socket needle 32 and a torpedo connecting cap, the first joint is screwed on the corresponding end part of the needle fish torpedo connector 5, and the torpedo socket needle 32 is fixed on the shell of the needle fish torpedo connector 5 through an inner hexagonal set screw; the hole torpedo wave detector connecting end is a second connector composed of a torpedo socket hole 33 and a fixing component, the second connector is screwed on the corresponding end of the hole torpedo connector 6, and the torpedo socket hole 33 is fixed on the shell of the hole torpedo connector 6 through an inner hexagonal set screw. When underground micro-earthquake monitoring operation is carried out, the torpedo socket hole 33 is in butt joint with the torpedo socket needle 8 of the borehole geophone, and the torpedo socket needle 32 is in butt joint with the torpedo socket hole 7 of the borehole geophone.

The cable connecting ends of the needle torpedo connector 5 and the hole torpedo connector 6 are all the seven-core cable fixed by the large, medium and small cone assemblies 34, and the large, medium and small cone assemblies 34 are fixed on the shell of the corresponding torpedo connector by the hexagon socket head cap set screws through the positioning holes in the cable connecting ends. The outside of cable link still is equipped with spring 35, and spring 35 plays the effect of protection seven core cable conductor, prevents that seven core cable conductor from excessively buckling and leading to the fracture condition.

The torpedo connector is used for connecting all levels of detectors. When the construction operation is not carried out, a torpedo protective cap needs to be connected to each of the torpedo socket needle 32 and the mine detector torpedo socket needle 8 in the well, and a torpedo protective plug needs to be connected to each of the torpedo socket hole 33 and the mine detector torpedo socket hole 7 in the well so as to carry out operations such as dust prevention and protection.

As shown in fig. 2, 3 and 4, each stage of the digital borehole geophone 4 comprises a pushing driving assembly, a pushing action assembly and an electronic instrument assembly, wherein the pushing driving assembly mainly provides driving force for the pushing action assembly, so that the pushing arm 23 of the pushing action assembly can be pushed open and retracted, and the electronic instrument assembly is mainly responsible for micro-seismic data acquisition and transmission work.

The pushing driving assembly comprises a pushing driving part shell 10, the top end of the pushing driving part shell 10 is connected with the torpedo socket hole 7 of the wave detector in the well through an upper torpedo socket 9, and the bottom end of the pushing driving part shell is connected with the pushing action assembly. The in-well detector torpedo socket hole 7 is used for connecting the needle torpedo connector 5, a socket body and seven jacks are arranged in the in-well detector torpedo socket hole 7, seven pins are correspondingly used for being plugged in the jacks, and the jacks are used for connecting a power line, a communication line and the like. The top end and the bottom end of the pushing driving part shell 10 are connected with corresponding structures in a mode of sealing O-shaped rings by threads, for example, a torpedo socket hole 7 of the wave detector in the well is fixed on an upper torpedo seat 9 by threads, and the other end of the upper torpedo seat 9 is fixed on the pushing driving part shell 10 by threads.

A motor circuit bin 11 is arranged above the inner portion of the pushing driving portion shell 10, a motor connecting shell 12 connected with the motor circuit bin 11 is arranged below the pushing driving portion shell, a motor control circuit board for controlling starting and stopping, forward and reverse rotation and current detection of a driving motor 13 is arranged in the motor circuit bin 11, the driving motor 13 is arranged in the motor connecting shell 12, and meanwhile, a wiring groove is further formed in the motor connecting shell 12 to facilitate wiring of internal electric wires. The bottom end of the motor connecting shell 12 and one end of the driving motor 13 extending out of the output shaft are fixedly connected with a motor connecting flange 14, a coupler 15 is arranged inside the motor connecting flange 14, one end of the coupler 15 is connected with the output shaft of the driving motor 13, and the other end of the coupler 15 is connected with a motor connecting shaft 38. The utility model provides a driving motor 13 adopts is brushless DC motor.

Further, the pushing drive assembly further comprises an upper bearing 16 and a lower bearing 17, the upper bearing 16 is sleeved on the motor connecting shaft 38 and is close to one side of the coupler 15, the lower bearing 17 is sleeved on the motor connecting shaft 38 and is far away from one side of the coupler 15, and the motor connecting shaft 38 can flexibly rotate due to the rolling fit of the upper bearing 16 and the lower bearing 17.

The driving motor 13 is electrically connected with a motor control circuit board for controlling the start and stop, the forward rotation and the reverse rotation of the driving motor 13 and the current detection, namely, the motor control circuit board can control the driving motor 13 to rotate forward and reverse, the driving motor 13 can drive the coupler 15 to rotate no matter rotates forward or reverse, and the coupler 15 simultaneously drives the motor connecting shaft 38 to rotate forward or reverse.

The motor driving circuit and the current detection circuit designed on the motor control circuit board can realize the start-stop and forward and reverse rotation operations of the driving motor 13, thereby flexibly controlling the pushing and retracting actions of the pushing and leaning arm 23.

The pushing action component comprises a pushing shell 18, a force transmission nut 19, a pushing arm seat block 20, a tension spring 21, a connecting rod 22, a pushing arm 23, a limiting groove 24 and a limiting screw pin 25.

The upper end of the pushing shell 18 is connected with a pushing shell upper joint 26, the lower end of the pushing shell 18 is connected with a pushing shell lower joint 27, and the pushing shell upper joint 26 and the pushing shell lower joint 27 are used for connecting two ends of the pushing shell 18 so as to be connected with other sections in the wave detector in the well. The upper bearing 16 and the lower bearing 17 are fixed to the inside of the push housing upper joint 26 and the push housing lower joint 27, respectively.

The pushing shell upper joint 26 is fixedly connected with the motor connecting flange 14 and the bottom end of the pushing drive part shell 10, so that the fixed connection between the pushing drive component and the pushing action component is realized. The motor connecting shaft 38 extends into the pushing shell 18, the middle part of the motor connecting shaft 38 is provided with external threads, the force transmission nut 19 and the pushing arm seat block 20 are screwed on the motor connecting shaft 38 in an inner hole thread form, and the upper end and the lower end of the tension spring 21 are respectively connected with the force transmission nut 19 and the pushing arm seat block 20 in a thread form. That is, the force transmission nut 19 moves up and down along with the rotation of the motor connecting shaft 38, and the tension spring 21 mainly functions to establish the connection between the force transmission nut 19 and the arm block 20, so that the structure formed by the force transmission nut 19, the tension spring 21 and the arm block 20 can move up and down along with the forward and reverse rotation of the motor connecting shaft 38.

Two sides of the leaning arm seat block 20 are respectively hinged with a connecting straight rod 22, the other ends of the two connecting straight rods 22 are respectively hinged with the middle of the corresponding leaning arms 23, and the top ends of the two leaning arms 23 are hinged with the leaning shell 18. When the movable structure formed by the force transmission nut 19, the tension spring 21 and the push arm seat block 20 moves up and down, the push arm seat block 20 drives the connecting rod 22 to move up and down, and the moving up and down of the connecting rod 22 drives the push-open and folding actions of the push arm 23.

Specifically, two sides of the arm rest block 20 are respectively provided with a fixing pin hole, one end of each of the two connecting straight rods 22 is respectively fixed to the fixing pin holes on the two sides of the arm rest block 20 through a fixing pin 36, the other end of each of the two connecting straight rods 22 is respectively fixedly connected to the middle of each of the two arm rests 23 through a fixing pin 36, and the top ends of the two arm rests 23 are connected to the arm rest housing 18 through fixing pins 36.

Meanwhile, a limit groove 24 which is parallel to the axial direction of the pushing shell 18 is formed in the pushing shell, a limit screw pin 25 is vertically fixed on the force transmission nut 19, and the free end of the limit screw pin 25 extends outwards into the limit groove 24. The limit screw pin 25 and the limit groove 24 serve to limit the up-and-down movement distance of the force-transmitting nut 19, thereby limiting the push-open and retraction angle of the push-arm 23. In the actual use process, whether the driving motor 13 stops rotating or not is controlled according to the actual push-open and folding requirements.

The driving motor 13 is electrically connected with a motor control circuit board which controls the starting, stopping, positive and negative rotation of the driving motor 13 and current detection, namely, no matter the pushing arm 23 is pushed away to reach the maximum limit or the pushing arm 23 is retracted to reach the minimum limit, a current detection circuit designed on the motor control circuit board can detect the real-time working current of the driving motor 13 and can control the driving motor 13 to stop working after the preset threshold current is reached.

Specifically, the utility model discloses in through design current detection circuit, when leaning on arm 23 with the steady pushing against of in-well wave detector on the wall of a well 3, if driving motor 13 continues to rotate, to driving motor 13, the load is too big, the electric current can sharply increase, do not operate the rotation that stops driving motor 13 and will burn out the motor, on the same way after leaning on arm 23 receipts are closed to spacing angle, do not stop driving motor 13 and rotate the operation and also can burn out the motor, therefore, the current detection circuit of design can stop driving motor 13 pivoted operation according to the electric current threshold value of settlement.

The utility model discloses in, even being connected between straight-bar 22 and the arm seat piece of pushing against 20 and pushing against arm 23 and pushing against being connected between shell 18 and be can dismantle the connection, like this in the use, can select arm 23 counts according to different hole diameters. When the borehole diameter is smaller, a single pushing mode can be selected, at the moment, any one of the pushing arms 23 and the connecting rod 22 on one side is detached, the other side is reserved, and the reserved pushing arm 23 can push and fix the borehole geophone on the borehole wall 3; when the borehole diameter is large, the length of the pushing arm 23 affects the pushing arm 23, the pushing arm 23 cannot stably push the borehole geophone against the borehole wall 3 when pushing the borehole to the maximum length, at the moment, a double pushing mode can be selected, the pushing arms 23 on two sides are reserved, the two pushing arms 23 are fixed on the borehole wall 3, the borehole geophone is suspended in the borehole, and the borehole geophone can be stably coupled with the borehole wall 3, so that the quality of received signals is ensured.

In order to further optimize the technical scheme of the embodiment, the free ends of the two backup arms 23 are provided with a plurality of transverse threads, which are mainly used for increasing the friction force between the backup arms 23 and the well wall 3.

The electronic instrument assembly comprises an electronic instrument shell 28, the top end of the electronic instrument shell 28 is connected with a lower joint 27 of the pushing shell through threads and two sealing O-shaped rings, and the bottom end of the electronic instrument shell is connected with a torpedo socket needle 8 of the wave detector in the well through a lower torpedo socket 29; a circuit framework 30 and a three-component sensor support 31 are arranged in the electronic instrument shell 28, a power supply circuit board, a collection circuit board and a communication circuit board are respectively fixed on the circuit framework 30 through screws, a three-component digital sensor circuit board is fixed on the three-component sensor support 31 through screws, and the three-component sensor support 31 is fixed on the circuit framework 30 through screws. The electronic instrument assembly further comprises a jack assembly 37 inserted on the torpedo socket pin 8 of the borehole geophone, and the power supply circuit board, the acquisition circuit board and the communication circuit are connected with the jack assembly 37 in a wired connection mode.

Meanwhile, the pintorpedo detector connecting end of the pintorpedo detector and the hole torpedo detector connecting end of the hole torpedo detector are respectively provided with a jack component 37 for establishing wired connection.

Wherein, the three-component sensor bracket 31 is provided with a digital MEMS acceleration sensor which is electrically connected with the three-component digital sensor circuit board, and the structure is disclosed in patent number ZL 201821793980.5; an acquisition circuit on the acquisition circuit board is designed by adopting a 32-bit high-precision AD conversion chip; the communication circuit on the communication circuit board adopts the OFDM modulation technology, the modulation frequency band reaches 2-28MHz, and the relay mode is supported.

The utility model discloses a detector device in multistage microseism digital well adopts digital MEMS acceleration sensor as microseism signal's perception end, compares with current moving coil wave detector, has the advantage that the frequency band range is wide, sensitivity is high, can gather abundanter microseism signal. The 32-bit high-precision AD conversion chip is adopted for designing the acquisition circuit, the effective resolution can reach 24 bits, the amplitude precision of the converted micro-seismic data is improved, and actual signals can be reflected more truly. The communication circuit adopts an OFDM modulation technology, the modulation frequency band can reach 2-28MHz, a relay mode is supported, and the acquired micro-seismic data can be transmitted to the ground control unit 1 in real time.

The utility model discloses still designed and had reliable and stable, simple structure, action accuracy, application scope wide, installation maintenance advantage such as convenient pushing away the device. The driving motor 13 can be used for controlling to ensure that the pushing and retracting of the pushing and retracting arms 23 can be realized, the accurate and flexible action of the pushing and retracting arms 23 can be ensured, meanwhile, the monitoring well can be suitable for monitoring wells with different sizes of well diameters, the pushing and retracting device is convenient to disassemble and assemble and easy to maintain in the using process, and the defects that the traditional pushing and retracting arms are weak in pushing force, the pushing and retracting arms cannot be retracted, the structure is complex, the maintenance cost is high, and the well diameter selection is inflexible are overcome. The borehole geophone can be stably pushed against the borehole wall 3, and the coupling effect of the borehole geophone is ensured, so that the quality of the acquired signal is ensured, and a favorable guarantee is provided for the subsequent positioning and interpretation work of the microseism event.

In the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A multi-stage microseismic digital borehole geophone apparatus comprising: the system comprises a ground control unit, a cable, a torpedo connector and a plurality of stages of digital borehole geophones; the torpedo connector is divided into a needle torpedo connector and a hole torpedo connector, two ends of the needle torpedo connector and two ends of the hole torpedo connector are respectively a cable connecting end and a wave detector connecting end, the needle torpedo wave detector connecting end can be connected with a torpedo socket hole of the in-well wave detector arranged at the top end of the in-well wave detector in each level of digital well, and the hole torpedo wave detector connecting end can be connected with a torpedo socket needle of the in-well wave detector arranged at the bottom end of the in-well wave detector in each level of digital well; the ground control unit is connected with a cable connecting end of the fish-shaped connector through a cable, the fish-shaped connector is connected with a fish-shaped socket hole of the in-well wave detector of the first-stage digital well, a fish-shaped socket needle of the in-well wave detector of the first-stage digital well is connected with the in-well wave detector of the second-stage digital well through the fish-shaped connector, the cable and the fish-shaped connector, and by analogy, the wave detectors in the two adjacent stages of digital wells are connected according to the connection mode of the wave detectors in the first-stage digital well and the second-stage digital well;

each stage of digital borehole wave detector comprises a pushing driving component, a pushing action component and an electronic instrument component;

the pushing driving assembly comprises a pushing driving part shell, the top end of the pushing driving part shell is connected with a torpedo socket hole of the wave detector in the well through an upper torpedo socket, and the bottom end of the pushing driving part shell is connected with the pushing action assembly; a motor circuit bin is arranged above the inner part of the pushing drive part shell, a motor connecting shell connected with the motor circuit bin is arranged below the pushing drive part shell, a motor control circuit board for controlling the starting and stopping, the positive and negative rotation and the current detection of the drive motor is arranged in the motor circuit bin, a drive motor is arranged in the motor connecting shell, the bottom end of the motor connecting shell and one end of the drive motor, which extends out of an output shaft, are fixedly connected with a motor connecting flange together, a coupler is arranged in the motor connecting flange, one end of the coupler is connected with the output shaft of the drive motor, and the other end of the coupler is connected with a motor connecting shaft; the middle part of the motor connecting shaft is provided with an external thread;

the pushing action component comprises a pushing shell, a force transmission nut, a pushing arm seat block, a tension spring, a connecting straight rod, a pushing arm, a limiting groove and a limiting screw pin; the upper end of the pushing shell is connected with a pushing shell upper joint, the lower end of the pushing shell upper joint is connected with a pushing shell lower joint, and the pushing shell upper joint is fixedly connected with a motor connecting flange and the bottom end of a pushing drive part shell; the motor connecting shaft extends into the pushing shell, the force transmission nut and the pushing arm seat block are screwed on the motor connecting shaft in an inner hole thread form, and the upper end and the lower end of the tension spring are respectively connected with the force transmission nut and the pushing arm seat block in a thread form; two sides of the pushing arm seat block are respectively hinged with a connecting straight rod, the other ends of the two connecting straight rods are respectively hinged with the middle of the corresponding pushing arm, and the top ends of the two pushing arms are hinged with the pushing shell; a limit groove which is parallel to the axial direction of the pushing shell is formed in the pushing shell, a limit screw pin is vertically fixed on the force transmission nut, and the free end of the limit screw pin extends outwards into the limit groove;

the electronic instrument assembly comprises an electronic instrument shell, the top end of the electronic instrument shell is connected with the lower connector of the pushing shell, and the bottom end of the electronic instrument shell is connected with the torpedo socket needle of the wave detector in the well through a lower torpedo socket; a circuit framework and a three-component sensor support are arranged in an electronic instrument shell, a power supply circuit board, a collecting circuit board and a communication circuit board are respectively installed and fixed on the circuit framework, a three-component digital sensor circuit board is installed and fixed on the three-component sensor support, and the three-component sensor support is installed and fixed on the circuit framework.

2. The multistage microseismic digital well detector device of claim 1 wherein the surface control unit comprises a computer responsible for sending control commands to each stage of digital well detector by using the supporting software and storing the data collected and transmitted by each stage of digital well detector; and the control cabinet is used for supplying power to the detector in each level of digital well through the switching power supply, and communicating with the detector in the digital well by using the high-speed communication module, and the control cabinet is also integrated with a GPS module for realizing synchronous acquisition of the detector in each level of digital well.

3. The multistage microseismic digital borehole detector apparatus according to claim 1 wherein the cable is a seven-core logging cable, using six of which, two cores for power supply, two cores for communication, and two cores for synchronous acquisition pulse transmission.

4. The multistage microseismic digital borehole geophone unit according to claim 1, wherein the Gonio geophone connection terminal is a first connector comprising a Torpedo pin and a Torpedo connection cap, the first connector is screwed to the corresponding end of the Gonio connector, and the Torpedo pin is fixed to the housing of the Gonio connector by a set screw; the hole torpedo wave detector connecting end is a second connector composed of a torpedo socket hole and a fixing component, the second connector is screwed on the corresponding end of the hole torpedo connector, and the torpedo socket hole is fixed on the shell of the hole torpedo connector through a set screw.

5. The multistage microseism digital borehole geophone device according to claim 1, wherein cable connecting ends of a needle torpedo connector and a hole torpedo connector are fixed with cables by large, medium and small cone assemblies, and the large, medium and small cone assemblies are fixed on a shell of the corresponding torpedo connector by a set screw through a positioning hole on the cable connecting end; and a spring for protecting the cable is arranged outside the cable connecting end.

6. The multistage microseismic digital borehole geophone unit according to claim 4, wherein when no construction work is performed, a torpedo protective cap is required to be connected to each of the torpedo socket pin and the borehole geophone torpedo socket pin, and a torpedo protective plug is required to be connected to each of the torpedo socket hole and the borehole geophone torpedo socket hole.

7. The multi-stage microseismic digital in-well detector device of claim 1 wherein the push driving assembly further comprises an upper bearing and a lower bearing, the upper bearing is sleeved on the motor connecting shaft at a position close to one side of the coupler, the lower bearing is sleeved on the motor connecting shaft at a position away from one side of the coupler, and the upper bearing and the lower bearing are respectively fixed inside the push casing upper joint and the push casing lower joint.

8. The multistage microseismic digital borehole geophone apparatus of claim 1, wherein the connection between the connecting rod and the backup arm seat block and the connection between the backup arm and the backup housing are both detachable connections.

9. The multistage microseismic digital borehole detector device of claim 1 wherein the three-component sensor support has mounted thereon a digital MEMS acceleration sensor electrically connected to the three-component digital sensor circuit board; an acquisition circuit on the acquisition circuit board is designed by adopting a 32-bit high-precision AD conversion chip; the communication circuit on the communication circuit board adopts an OFDM modulation technology, the modulation frequency band reaches 2-28MHz, and a relay mode is supported.

10. The multistage microseism digital borehole geophone device according to any one of claims 1 to 9, wherein each side of the backup arm base block is provided with a fixing pin hole, one end of each of the two straight rods is fixed to the fixing pin hole on each side of the backup arm base block by a fixing pin, the other end of each of the two straight rods is fixedly connected to the middle of each of the two backup arms by a fixing pin, and the top ends of the two backup arms are connected to the backup housing by fixing pins.

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