Slurry pulse signal amplitude improving device

Abstract

The device for improving the amplitude of the mud pulse signal is used for improving the relative amplitude of an original pulse signal of an underground pulser, obtaining a positive and negative combined pulse signal which is more recognizable than a single positive pulse signal or a single negative pulse signal, improving the relative amplitude of a pulse signal transmitted to the ground, manufacturing a pulse waveform which is easier to recognize, and improving the accuracy of the pulse waveform. The accuracy of a ground acquisition decoding system is improved, and reliable pulse signals are provided for directional drilling of a myriameter ultra-deep well.

Description

Technical Field

[0001] The present invention relates to the technical field of measurement - while - drilling (MWD) transmission in oil and gas well drilling engineering, and particularly to a device for increasing the amplitude of mud pulse signals. Background Art

[0002] Measurement - while - drilling (MWD) transmission is a data transmission technology used in oil and gas well drilling engineering, and this technology is achieved through the generation and transmission of pressure pulse signals. Currently, there are mainly three types of mud pulse systems: positive pulse, negative pulse, and continuous wave systems. Among them, the positive pulse system uses a special mechatronic structure to block the flow of drilling fluid in the drill string, thereby generating a pulse signal with increased pressure; the negative pulse system forms a pulse signal with a reduced drilling fluid pressure in the drill string by releasing a certain amount of high - pressure drilling fluid in the drill string into the low - pressure annulus; the continuous wave system uses a rotary valve to generate a pressure continuous wave with a fixed frequency, and encodes and decodes information according to the phase shift of the continuous wave. In MWD for ultra - deep well drilling, the positive pulse technology is mainly used.

[0003] In MWD for oil and gas well drilling, the amplitude of the mud pulse signal generated by the pulse generator is affected by various factors such as drilling fluid displacement, density, viscosity, mud properties, drill string size, depth, pulse generator valve head clearance, and pulse width. Among them, depth and drilling fluid density have the greatest impact on the signal amplitude. The shear - valve positive pulse generator is the most mature technology currently in use, and its pulse signal amplitude increases with the decrease of the valve head clearance and the increase of the pulse width. In order to improve the accuracy of ground data acquisition and decoding, it is necessary to ensure that the amplitude of the drilling fluid pressure wave signal collected exceeds a certain lower threshold, such as 10 psi. Signals below this threshold are difficult to decode correctly.

[0004] However, when applied to directional drilling in ultra - deep wells of ten thousand meters, the existing mud pulse generators have some problems. First, the positive pulse generator is limited by the minimum clearance and maximum pulse width, resulting in the inability to further increase the original signal amplitude after the well depth reaches a certain level, and the well depth also significantly affects the attenuation degree of the signal amplitude. Second, the application depth of the negative pulse generator is limited. Finally, although the continuous wave pulse generator has a fast transmission speed, it is not suitable for the application in deep and ultra - deep wells because the signal attenuates faster. Therefore, when the well depth reaches a certain level, the amplitude of the signal collected by the ground signal acquisition and decoding system is difficult to reach above the threshold, thereby reducing the reliability of data acquisition and decoding.

[0005] In summary, proposing a device that can increase the relative amplitude of the original pulse signal of the downhole pulse generator is of great significance for improving the accuracy of the ground acquisition and decoding system and providing a reliable pulse signal for directional drilling in ultra - deep wells of ten thousand meters. Summary of the Invention

[0006] The present invention provides a device for increasing the amplitude of mud pulse signals, which is used to increase the relative amplitude of the original pulse signals of downhole pulsators, thereby improving the accuracy of the ground acquisition and decoding system and providing reliable pulse signals for ten-thousand-meter ultra-deep directional drilling.

[0007] The present invention provides a device for increasing the amplitude of mud pulse signals, comprising: a pulsator pulse waveform control unit, a positive pulse generator, and a negative pulse generator;

[0008] The pulsator pulse waveform control unit is used to obtain a pulse coding signal and decompose the pulse coding signal into two edge control instructions. The signal representing the pulse rising edge is sent to the positive pulse generator, and the signal representing the pulse falling edge is sent to the negative pulse generator;

[0009] The positive pulse generator is electrically connected to the pulsator pulse waveform control unit. The positive pulse generator responds to the signal representing the rising edge and forms a positive mud pressure wave with the same amplitude in the drill string;

[0010] The negative pulse generator is electrically connected to the pulsator pulse waveform control unit. The negative pulse generator responds to the signal representing the falling edge and forms a negative mud pressure wave with the same amplitude in the drill string.

[0011] In a possible design, it further includes a drill collar structure body and a pressure-resistant cylinder housing;

[0012] The drill collar structure body is connected to the pressure-resistant cylinder housing. The drill collar structure body is used to support and fix the positive pulse generator and the negative pulse generator;

[0013] The pressure-resistant cylinder housing is used to protect the positive pulse generator and the negative pulse generator from external environmental interference and damage.

[0014] In a possible design, the positive pulse generator is a motor-driven shear valve type positive pulse generator.

[0015] In a possible design, the shear valve type positive pulse generator is composed of a valve head assembly, a reducer, a magnetic coupler, a dynamic seal, a pressure balance structure, a motor, a motor control drive unit, and a pulse signal edge detection module;

[0016] The valve head assembly is connected to the reducer and is used to control the flow of hydraulic or pneumatic pressure;

[0017] The reducer is connected to the magnetic coupler and is used to adjust the movement speed of the valve head assembly;

[0018] The magnetic coupler is respectively connected to the dynamic seal and the pressure balance structure and is used to transmit the driving force and maintain pressure balance;

[0019] The dynamic seal is connected to the valve head assembly to prevent pressure leakage and maintain sealing performance;

[0020] The pressure balance structure is respectively connected to the dynamic seal and the magnetic coupler to balance pressure;

[0021] The motor control drive unit is respectively connected to the motor and the pulse signal edge detection module to control the operation of the motor and receive the pulse signal transmitted by the pulse signal edge detection module.

[0022] In a possible design, the negative pulse signal generator is composed of a mushroom head, a pressure relief valve, a solenoid valve, a solenoid valve drive control module, and the pulse signal edge drive detection module connected in sequence;

[0023] The mushroom head is used to trigger the generation of the negative pulse signal; the pressure relief valve is used to control pressure release; the solenoid valve drive control module is used to control the drive of the solenoid valve and receive the pulse signal; the pulse signal edge drive detection module is used to detect the edge of the pulse signal and drive the on-off state of the solenoid valve.

[0024] In a possible design, the negative pulse signal generator is composed of the mushroom head, the pressure relief valve, the motor, the motor drive control module, and the pulse signal edge drive monitoring module;

[0025] The motor, the motor drive control module, and the pulse signal edge drive monitoring module are sequentially linked. The motor drive control module is used to control the working state of the motor and receive the signal provided by the pulse signal edge drive monitoring module.

[0026] The pulse waveform control unit of the pulser is a coded pulse signal delay drive board.

[0027] In a possible design, the coded pulse signal delay drive board is composed of an MCU.

[0028] In a possible design, the pulse coded signal is measured by a measuring sonde.

[0029] In a possible design, the measuring sonde is an MWD sonde.

[0030] From the above technical solutions, it can be seen that the present invention has the following advantages:

[0031] The present invention provides a mud pulse signal amplitude enhancement device, which is used to enhance the relative amplitude of the original pulse signal of a downhole pulser. The device includes a pulser pulse waveform control unit, a positive pulse generator and a negative pulse generator; the pulser pulse waveform control unit is used to obtain a pulse coding signal, and decompose the pulse coding signal into two edge control instructions, the signal representing the rising edge of the pulse is sent to the positive pulse generator, and the signal representing the falling edge of the pulse is sent to the negative pulse generator; the positive pulse generator is electrically connected to the pulser pulse waveform control unit, and the positive pulse generator responds to the signal representing the rising edge to form a positive mud pressure wave with the same amplitude in the drill string; the negative pulse generator is electrically connected to the pulser pulse waveform control unit, and the negative pulse generator responds to the signal representing the falling edge to form a negative mud pressure wave with the same amplitude in the drill string. Without increasing the complexity of the instrument too much, the pulse signal base value and shape are changed to form positive and negative pulse mud pressure waves with the same amplitude and opposite directions in the drill string. This will increase the relative amplitude of the original pulse signal of the downhole pulser, obtain a positive and negative combined pulse signal that is more recognizable than a single positive pulse or negative pulse signal, increase the relative amplitude of the pulse signal transmitted to the ground, create a more easily recognizable pulse waveform, improve the accuracy of the ground acquisition and decoding system, and provide reliable pulse signals for directional drilling of ultra-deep wells of 10,000 meters. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0033] Figure 1 It is a structural schematic diagram of an embodiment of a device for increasing the amplitude of a mud pulse signal of the present invention;

[0034] Figure 2 It is a schematic diagram of the original waveform of the positive pulse;

[0035] Figure 3 This is a schematic diagram of the positive pulse ground waveform;

[0036] Figure 4 It is a schematic diagram of the original waveform of the negative pulse;

[0037] Figure 5 This is a schematic diagram of the negative pulse ground waveform;

[0038] Figure 6 It is a schematic diagram of the original waveform of the positive and negative combined pulses;

[0039] Figure 7Schematic diagram of positive and negative combined pulse ground waveform;

[0040] Figure 8 Schematic diagram of the composition of an embodiment of a device for increasing the amplitude of mud pulse signals according to the present invention;

[0041] Figure 9 Signal relationship diagram of the pulse signal delay driving board of the present invention;

[0042] Figure 10 Flowchart of signal generation of the pulse signal delay driving board based on a microprocessor according to the present invention. Detailed implementation manners

[0043] An embodiment of the present invention provides a device for increasing the amplitude of mud pulse signals, which is used to increase the relative amplitude of the original pulse signals of downhole pulsators, thereby improving the accuracy of the ground acquisition and decoding system, and providing reliable pulse signals for ten-thousand-meter ultra-deep directional drilling.

[0044] In order to make the objectives, features, and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the embodiments described below are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0045] Embodiment 1

[0046] Please refer to Figure 1 Figure 1 Schematic structural diagram of an embodiment of a device for increasing the amplitude of mud pulse signals according to the present invention. In this example, the device for increasing the amplitude of mud pulse signals includes: a pulsator pulse waveform control unit, a positive pulse generator 3, and a negative pulsator generator 4;

[0047] The pulsator pulse waveform control unit is used to obtain a pulse coding signal and decompose the pulse coding signal into two edge control instructions. The signal representing the rising edge of the pulse is sent to the positive pulse generator 3, and the signal representing the falling edge of the pulse is sent to the negative pulse generator 4;

[0048] The positive pulse generator 3 is electrically connected to the pulsator pulse waveform control unit. The positive pulse generator 3 responds to the signal representing the rising edge and forms a positive mud pressure wave with the same amplitude in the drill string;

[0049] The negative pulse generator 4 is electrically connected to the pulsator pulse waveform control unit. The negative pulse generator 4 responds to the signal representing the falling edge and forms a negative mud pressure wave with the same amplitude in the drill string.

[0050] The waveform diagrams sent by the positive pulse generator 3 and the negative pulse generator 4 in the embodiments of the present invention are respectively as follows Figures 2 to 7 shown as Figure 2 is the schematic diagram of the original positive pulse waveform, Figure 3 is the schematic diagram of the positive pulse ground waveform, Figure 4 is the schematic diagram of the original negative pulse waveform, Figure 5 is the schematic diagram of the negative pulse ground waveform, Figure 6 is the schematic diagram of the original positive and negative combined pulse waveform, Figure 7 is the schematic diagram of the positive and negative combined pulse ground waveform. It can be seen that without increasing the parameters and configurations of the positive pulse generator and the negative pulse generator, by combining the positive and negative pulse generators and controlling their action timing sequences, the relative amplitude of the drilling fluid pulse signal is doubled.

[0051] In addition, the ground decoding system adjusts the original pulse-related waveform from a [0,1] binary rectangular wave to a [0,1,-1] ternary square wave, thereby increasing the signal recognition ability and improving the decoding accuracy.

[0052] Please refer to Figure 2 , Figure 2 which is the schematic diagram of the composition of an embodiment of a device for increasing the amplitude of the mud pulse signal of the present invention. In the above-mentioned Embodiment 1, when the pulse waveform control unit 2 of the pulser receives the pulse coding signal sent from the measurement sonde 1, it automatically decomposes the pulse coding signal into two edge control instructions. The signal representing the pulse rising edge is sent to the positive pulse generator 3, and the signal representing the pulse falling edge is sent to the negative pulse generator 4 to drive the negative pulse generator 4 to work. The positive pulse generator 3 and the negative pulse generator 4 work according to the pre-set timing sequence to form positive and negative mud pressure waves with the same amplitude and opposite directions in the drill string.

[0053] The relative amplitude of the original pulse signal of the downhole pulser is increased by the cooperation of the positive pulse generator 3 and the negative pulse generator 4. Specifically, since the amplitude of the mud pulse signal is doubled, it means that in the field of measurement while drilling in ultra-deep wells, the effective depth of the measurement while drilling instrument is increased by about 4000m.

[0054] At the same time, due to obtaining a positive and negative combined pulse signal that is more recognizable than a single positive or negative pulse signal, a more recognizable pulse waveform is manufactured, improving the accuracy of the ground acquisition and decoding system, and providing a reliable pulse signal for directional drilling in ultra-deep wells of 10,000 meters.

[0055] Embodiment 2

[0056] In a device for increasing the amplitude of the mud pulse signal in the embodiments of the present invention, in addition to including a pulser pulse waveform control unit, a positive pulse generator, and a negative pulse generator, it also includes a drill collar structure body and a compression cylinder housing;

[0057] The drill collar structure body is connected to the pressure-resistant cylinder housing, and the drill collar structure body is used to support and fix the positive pulse generator 3 and the negative pulse generator 4;

[0058] The pressure-resistant cylinder housing is used to protect the positive pulse generator 3 and the negative pulse generator 4 from external environmental interference and damage.

[0059] In the second embodiment above, the drill collar structure body is used to support and fix the positive pulse generator 3 and the negative pulse generator 4, and the positive pulse generator 3 and the negative pulse generator 4 are protected by the pressure-resistant cylinder housing, so as to ensure that the device for increasing the amplitude of the mud pulse signal is not affected by the external environment and is not damaged by external forces.

[0060] Embodiment Three

[0061] The positive pulse generator 3 in the embodiment of the present invention is a motor-driven shear valve type positive pulse generator, and the shear valve type positive pulse generator is composed of a valve head assembly, a speed reducer, a magnetic coupler, a dynamic seal, a pressure balance structure, a motor, a motor control drive unit, and a pulse signal edge detection module;

[0062] The valve head assembly is connected to the speed reducer and is used to control the flow rate of hydraulic pressure or air pressure;

[0063] The speed reducer is connected to the magnetic coupler and is used to adjust the movement speed of the valve head assembly;

[0064] The magnetic coupler is respectively connected to the dynamic seal and the pressure balance structure and is used to transmit the driving force and maintain pressure balance;

[0065] The dynamic seal is connected to the valve head assembly and is used to prevent pressure leakage and maintain the sealing performance;

[0066] The pressure balance structure is respectively connected to the dynamic seal and the magnetic coupler and is used to balance the pressure;

[0067] The motor control drive unit is respectively connected to the motor and the pulse signal edge detection module and is used to control the operation of the motor and receive the pulse signal transmitted by the pulse signal edge detection module.

[0068] And in the embodiment of the present invention, there are two types of negative pulse signal generators 4, which are respectively:

[0069] (1) It consists of a mushroom head, a pressure relief valve, a solenoid valve, a solenoid valve drive control module, and the pulse signal edge drive detection module connected in sequence; the mushroom head is used to trigger the generation of a negative pulse signal; the pressure relief valve is used to control pressure release; the solenoid valve drive control module is used to control the drive of the solenoid valve and receive the pulse signal; the pulse signal edge drive detection module is used to detect the edge of the pulse signal and drive the on / off state of the solenoid valve.

[0070] (2) It consists of the mushroom head, the pressure relief valve, the motor, the motor drive control module, and the pulse signal edge drive monitoring module; the motor, the motor drive control module, and the pulse signal edge drive monitoring module are connected in sequence, and the motor drive control module is used to control the working state of the motor and receive the signal provided by the pulse signal edge drive monitoring module.

[0071] In the embodiment of the present invention, usually, a positive pulse generator, such as a motor-driven shear valve type positive pulse generator, consists of a valve head assembly, a mechanical assembly, a reducer, a magnetic coupler, a dynamic seal, a pressure balance structure, a motor, a motor control drive unit, a pulse signal edge detection module, etc. The negative pulse signal generator consists of a mushroom head, a pressure relief valve, a solenoid valve, a solenoid valve drive control module, or a motor, a motor drive control module, a mechanical assembly, a pulse signal edge drive monitoring module, etc.

[0072] It should be noted that in order to obtain twice the pulse signal amplitude, it is necessary to correctly set the working timing of the positive pulse generator 3 and the negative pulse generator 4. The normal configuration is as follows:

[0073] For a normally encoded pulse signal sequence, the rising edge of the pulse signal is identified by the pulse signal rising edge detection module. The rising edge drives the motor control module of the positive pulse generator 3 to control the mushroom head or shear valve of the positive pulse generator 3. This will control it to switch from the reset state to the valve closed state, thereby controlling the flow area of the positive pulse generator 3 to transition from the maximum to the minimum. At the same time, keep the pressure relief valve of the negative pulse generator 4 in the closed state to ensure that no drilling fluid flows out of the pressure relief valve.

[0074] When the falling edge of the normally encoded pulse signal is monitored, control the positive pulse generator 3 to act, so that it returns from the valve closed state to the reset state. Thereby controlling the flow area of the positive pulse generator 3 to return from the minimum to the maximum. At the same time, the falling edge of this pulse encoded signal serves as an action execution instruction for the negative pulse generator 4. This controls the overflow valve of the negative pulse generator 4 to transition from the closed state to the open state. This allows a part of the drilling fluid to be released through the pressure relief valve of the negative pulse generator 4 into the annulus. Subsequently, after a period of time (i.e., the pulse width time), the overflow valve is automatically closed. Thus, a drilling fluid negative pressure wave with a certain amplitude and pulse width is formed.

[0075] When the falling edge of the encoded pulse signal passes through a pulse width time, the positive and negative drilling fluid pressure waves of the present invention return to the state where the positive pulse generator 3 has the largest flow area and the negative pulse generator 4 has the smallest flow area. At this time, the drilling fluid pressure wave returns to the baseline pressure value without a pulse signal.

[0076] Similarly, the rising edge of the encoded pulse signal can be configured as the start signal of the negative pulse generator 4. When the rising edge of the encoded pulse signal arrives, control the pressure relief valve of the negative pulse generator 4 to transition from the closed state to the open state, causing the drilling fluid pressure wave to decrease first. When the falling edge of the encoded pulse signal arrives, control the pressure relief valve of the negative pulse generator 4 to return from the open state to the closed state. At the same time, start the positive pulse generator 3, causing its mushroom head or shear valve to transition from the largest flow area to the smallest flow area. Then, when the predetermined pulse width time arrives, the positive pulse generator automatically returns from the state with the smallest flow area to the state with the largest flow area. This will achieve a drilling fluid pressure wave that first decreases and then increases.

[0077] In the above Embodiment 3, the drill collar structure body is used to support and fix the positive pulse generator 3 and the negative pulse generator 4, and the positive pulse generator 3 and the negative pulse generator 4 are protected by the anti-pressure cylinder housing, thereby ensuring that the device for improving the amplitude of the mud pulse signal is not affected by the external environment and is not damaged by external forces.

[0078] Embodiment 4

[0079] As an implementation method, the pulse waveform control unit of the pulser can be designed as an encoded pulse signal delay driving board. The measurement-while-drilling system based on the positive and negative combined pulse generator of the present invention forms two driving signals after delaying an encoded pulse signal by a pulse width. These two driving signals have the same shape, and the second driving signal is delayed by 1 pulse width time compared to the first driving signal. It can be used to directly drive the positive pulse generator 3 and the negative pulse generator 4 without the need to modify the control modules of the existing positive pulse generator 3 and negative pulse generator 4.

[0080] As an implementation method for increasing the amplitude of the positive and negative pulse signals, the pulse waveform control unit can adopt an encoded pulse signal delay driving board, which is composed of a minimum package microcontroller (such as PIC16F15313-E / P, etc.), can receive the encoded pulse signal Pulser_In of the MWD tool, and generate two output signals Pulser_Out1 and Pulser_Out2, as Figure 9 shown. Among them, Pulser_Out1 is the same as Pulser_In, while Pulser_Out2 is delayed by a pulse width time T.

[0081] Please refer to Figure 10 ,Figure 10 The following is the signal generation flowchart of the microprocessor pulse signal delay driving board according to the present invention. To implement the signal generation of the microprocessor pulse signal delay driving board, the following steps are required:

[0082] (1) Set GPIO1 of the microcontroller as an input pin with the working mode of edge capture. Set GPIO2 and GPIO3 of the microcontroller as output pins respectively for outputting Pulser_Out1 and Pulser_Out2.

[0083] (2) When the rising edge of the pulse signal is detected on GPIO1, set Pulser_Out1 to high level and Pulser_Out2 to low level. At the same time, start a timer to record the pulse width time T.

[0084] (3) When the falling edge of the pulse signal is detected on GPIO1, set Pulser_Out1 to low level to complete the synchronization of the first output signal and the input signal. At the same time, set Pulser_Out2 to high level and read the timer clock that records the pulse width time T. The number of clock counts recorded by the timer is the pulse width time T.

[0085] (4) After waiting for the system delay time T, set Pulser_Out2 to low level to complete the delayed transmission of the pulse signal.

[0086] In the above steps, the output signals Pulser_Out1 and Pulser_Out2 drive a conventional positive pulse generator and a negative pulse generator respectively, so as to achieve the purpose of increasing the amplitude of the positive and negative pulse signals.

[0087] Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the above-described systems, devices, and units can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated herein.

[0088] In several embodiments provided in the present application, it should be understood that the methods, devices, electronic devices, and storage media disclosed in the present disclosure can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces, and the indirect couplings or communication connections of the devices or units can be in electrical, mechanical, or other forms.

[0089] The unit described as a separation component may or may not be physically separated. The component shown as a unit may or may not be a physical unit, that is, it may be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0090] In addition, in each embodiment of the present disclosure, each functional unit may be integrated in a processing unit, may exist separately as individual physical units, or two or more units may be integrated in one unit. The above integrated unit may be implemented in the form of hardware or in the form of a software functional unit.

[0091] If the above integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present disclosure, in essence, or the part that contributes to the prior art, or all or part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a readable storage medium and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in each embodiment of the present disclosure. The aforementioned readable storage medium includes: USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs and other various media that can store program codes.

[0092] As described above, the above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them; although the present disclosure has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of each embodiment of the present disclosure.

Claims

1. An apparatus for increasing the amplitude of mud pulse signals, characterized in that, Comprising: A pulse generator pulse waveform control unit, a positive pulse generator, and a negative pulse generator; The pulse generator pulse waveform control unit is used to obtain a pulse coding signal and decompose the pulse coding signal into two edge control instructions. The signal representing the rising edge of the pulse is sent to the positive pulse generator, and the signal representing the falling edge of the pulse is sent to the negative pulse generator; The positive pulse generator is electrically connected to the pulse generator pulse waveform control unit. The positive pulse generator responds to the signal representing the rising edge and forms a positive mud pressure wave with the same amplitude in the drill string; The negative pulse generator is electrically connected to the pulse generator pulse waveform control unit. The negative pulse generator responds to the signal representing the falling edge and forms a negative mud pressure wave with the same amplitude in the drill string.

2. The device for increasing the amplitude of the mud pulse signal according to claim 1, wherein It further includes a drill collar structure body and a pressure-resistant cylinder housing; The drill collar structure body is connected to the pressure-resistant cylinder housing. The drill collar structure body is used to support and fix the positive pulse generator and the negative pulse generator; The pressure-resistant cylinder housing is used to protect the positive pulse generator and the negative pulse generator from interference and damage from the external environment.

3. The device for increasing the amplitude of the mud pulse signal according to claim 1, wherein The positive pulse generator is a motor-driven shear valve type positive pulse generator.

4. The apparatus for increasing the amplitude of the mud pulse signal according to claim 3, wherein The shear valve type positive pulse generator is composed of a valve head assembly, a reducer, a magnetic coupler, a dynamic seal, a pressure balance structure, a motor, a motor control drive unit, and a pulse signal edge detection module; The valve head assembly is connected to the reducer and is used to control the flow rate of hydraulic or pneumatic pressure; The reducer is connected to the magnetic coupler and is used to adjust the movement speed of the valve head assembly; The magnetic coupler is respectively connected to the dynamic seal and the pressure balance structure and is used to transmit the driving force and maintain pressure balance; The dynamic seal is connected to the valve head assembly and is used to prevent pressure leakage and maintain the sealing performance; The pressure balance structure is respectively connected to the dynamic seal and the magnetic coupler and is used to balance the pressure; The motor control drive unit is respectively connected to the motor and the pulse signal edge detection module and is used to control the operation of the motor and receive the pulse signal transmitted by the pulse signal edge detection module.

5. The device for increasing the amplitude of mud pulse signals according to claim 4, characterized in that, The negative pulse signal generator is composed of a mushroom head, a pressure relief valve, a solenoid valve, a solenoid valve drive control module, and the pulse signal edge drive detection module connected in sequence; The mushroom head is used to trigger the occurrence of the negative pulse signal; the pressure relief valve is used to control the pressure release; the solenoid valve drive control module is used to control the drive of the solenoid valve and receive the pulse signal; the pulse signal edge drive detection module is used to detect the edge of the pulse signal and drive the on-off state of the solenoid valve.

6. The apparatus for increasing the amplitude of the mud pulse signal according to claim 5, characterized in that The negative pulse signal generator is composed of the mushroom head, the pressure relief valve, the motor, the motor drive control module, and the pulse signal edge drive monitoring module; The motor, the motor drive control module, and the pulse signal edge drive monitoring module are sequentially linked. The motor drive control module is used to control the working state of the motor and receive the signal provided by the pulse signal edge drive monitoring module.

7. The device for increasing the amplitude of the mud pulse signal according to claim 1, wherein The pulse generator pulse waveform control unit is a coded pulse signal delay drive board.

8. The device for increasing the amplitude of the mud pulse signal according to claim 7, characterized in that, The encoded pulse signal delay driving board is composed of an MCU.

9. The device for increasing the amplitude of mud pulse signals according to claim 1, characterized in that, The pulse encoded signal is obtained by measuring with a measuring tool string.

10. The device for increasing the amplitude of the mud pulse signal according to claim 9, characterized in that, The measuring tool string is an MWD tool string.

Images