Wireless data receiver capable of accurately positioning

Abstract

The invention discloses a wireless data receiver capable of accurately positioning, which is arranged in an outer pipe of a near-bit data receiving short section and comprises a head component, a receiving plate component, a battery component, a signal plate component, an electronic instrument shell and a tail component, the head assembly and the tail assembly are connected to the two ends of the electronic instrument shell in a sealed mode respectively and supported in the outer pipe. A wire passing hole and a water passing hole are formed in the head assembly, and a water passing cavity is formed between the electronic instrument shell and the outer pipe. The water passing hole is communicated with the water passing cavity; the receiving plate assembly, the battery assembly and the signal plate assembly are electrically connected with one another and are all arranged in the electronic instrument shell; the receiving plate assembly is connected with a receiving antenna assembly of the near-bit data receiving short section through a cable in a wire passing hole, and the signal plate assembly is in data communication with a conventional MWD through the tail assembly. The problems of transmission, sealing and positioning of wireless signals across the screw motor are solved, miniaturization design is achieved, and signal transmission real-time performance and shock resistance are improved.

Description

Technical Field

[0001] This invention belongs to the technical field of underground drilling measurement equipment in coal mines, and specifically relates to a wireless data receiver capable of precise positioning. Background Technology

[0002] Measurement While Drilling (MWD) technology uses sensor modules installed inside the drill pipe to acquire and transmit trajectory parameters and geological data in real time during the drilling process. This system is widely used in energy industries such as oil and gas, but its application in coal mines is limited by various environmental and technical factors. The underground coal mine environment is complex and variable, characterized by high humidity, high pressure, dense dust, and explosion risks. These factors place higher demands on the explosion-proof performance, miniaturization design, and signal transmission stability of the measurement equipment.

[0003] Most existing coal mine measurement-while-drilling (MWD) systems use conventional measuring equipment, which is typically installed at a distance of about 5-8 meters from the drill bit. This results in significant data lag, failing to reflect the actual geological conditions ahead of the drill bit in a timely manner. This not only increases the difficulty of trajectory control during drilling but may also lead to increased borehole accuracy deviations, affecting overall drilling efficiency and safety. Near-bit MWD technology is a key direction for solving these problems. By installing the measuring equipment close to the drill bit, the difficulty of borehole trajectory control can be significantly reduced, and drilling accuracy can be improved. Specifically, the near-bit data receiving section is installed behind the screw motor to receive data measured by the near-bit measuring section. After receiving the data, it is transmitted to the directional drilling rig's computer via the directional drill pipe. This arrangement enables real-time monitoring of geological data ahead of the drill bit, avoiding the signal attenuation and delay problems caused by excessive distance in traditional systems. However, existing near-bit measurement-while-drilling devices developed in the surface oil sector cannot be directly used in coal mines due to two main drawbacks: First, these devices do not meet the special explosion-proof requirements of coal mines. The designs in the oil sector often overlook the explosion risks and dust protection of the coal mine environment, leading to potential safety hazards. Second, the devices are generally large in diameter, which does not meet the requirements for small-diameter directional drilling in coal mines. This large-diameter design will seriously affect the build-up rate of the screw motor, reducing drilling mobility and efficiency.

[0004] In directional drilling in coal mines, the screw motor, as the core power component, has extremely limited space behind it. Therefore, the receiving sub must be miniaturized and designed with high strength to adapt to the confined drilling environment. Simultaneously, near-bit measurement data needs to be transmitted and received wirelessly across the screw motor, involving the amplification, demodulation, and anti-interference processing of weak electromagnetic signals. In existing technologies, the cable connection between the receiving antenna assembly and the circuit assembly often faces the problem of inaccurate positioning of the wiring port, leading to signal transmission interruption or increased noise interference. Furthermore, the signal connection between the receiving sub and the conventional downhole measurement system (MWD) also presents challenges; conventional connection methods cannot ensure reliable data transmission under strong vibration environments. In particular, the receiver assembly, as the core component of the receiving sub, directly affects the sealing connection and circumferential positioning of the electronic instruments. Existing receiver assemblies mostly use simple threaded connections, but this method is prone to loosening under high vibration conditions in the mine, causing misalignment of the wiring port and high-pressure water infiltration, further amplifying measurement lag and the risk of equipment failure.

[0005] The receiver assembly must simultaneously fulfill multiple functions, including supporting electronic instruments, providing a sealed connection, and circumferential positioning. First, it supports electronic instruments such as the receiver board assembly, battery assembly, and signal board assembly for signal amplification, demodulation, and output. Second, the head and tail assemblies are sealed to both ends of the electronic instrument housing and fixed within an outer tube, forming a water passage cavity. Third, the cable passage and water passage are interconnected to ensure the stability of both the cable and water passages. Existing assembly structures struggle to meet these requirements simultaneously. Ordinary connection methods are unstable and prone to loosening under strong vibrations, leading to signal transmission interruptions or water pressure leaks. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to solve the above problems and provide a wireless data receiver that can be accurately located.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A precisely positioned wireless data receiver is disposed inside the outer tube of a near-drill bit data receiving section. The precisely positioned wireless data receiver includes a head assembly, a receiver board assembly, a battery assembly, a signal board assembly, an electronic instrument housing, and a tail assembly. The head assembly and tail assembly are respectively sealed and connected to both ends of the electronic instrument housing, and are supported in the outer tube by the head assembly and tail assembly; the head assembly is provided with a wire hole and a water hole, and a water passage cavity is formed between the electronic instrument housing and the outer tube; the water hole communicates with the water passage cavity; The receiver board assembly, battery assembly, and signal board assembly are electrically connected to each other and are all housed within the electronic instrument housing. The receiver board assembly is connected to the receiving antenna assembly of the near-drill bit data receiving section via a cable in the through-hole, and the signal board assembly communicates with conventional MWD data via the tail assembly.

[0008] Furthermore, the head assembly includes a head connector body, a rotating ring, a baffle, and a semi-ring; The head connector is located inside the outer tube of the near-drill bit data receiver, and electronic instruments are also installed inside the outer tube of the near-drill bit data receiver. The outer circumference of the head connector is stepped, including a large section, a middle section, and a small section connected in sequence. The small section is provided with a positioning plane, which cooperates with the positioning plane provided on the housing of the electronic instrument to achieve axial and circumferential positioning. The outer circumference of the large section is provided with a sealing element, which is sealed to the outer tube of the near-drill bit data receiver. One end of the wire hole extends axially along the head connector body to the end face of the small section and communicates with the inner cavity of the electronic instrument housing. The other end extends radially along the head connector body to the outer circle of the large section and communicates with the wiring compartment on the outer tube.

[0009] Furthermore, the water passage includes a first water passage and a second water passage; one end of the first water passage extends axially along the head connector body to the end face of the large section and communicates with the water passage inner hole of the receiving antenna assembly at the front end of the outer tube, and the other end extends radially along the head connector body to the outer circle of the middle section and communicates with the water passage cavity between the outer tube and the electronic instrument housing; the second water passage is located outside the first water passage, and the second water passage is waist-shaped and directly penetrates both ends of the large section of the head connector body; The rotating ring is rotatably mounted on the middle section, and the rotating ring is provided with threads for connecting to the electronic instrument housing; one end of the rotating ring contacts the stepped end face of the head connector body, and the other end is provided with the baffle and half ring, the half ring is fixed on the small section, and the baffle limits the axial movement of the rotating ring.

[0010] Furthermore, the rotating ring includes a threaded section and a locking section; the threaded section is used to connect with the housing of the electronic instrument, the locking section is provided with a screw, and the middle section of the head connector body is provided with circumferentially distributed limiting grooves. The screw is screwed into the limiting grooves, thereby restricting the circumferential rotation of the rotating ring and preventing the threads from loosening.

[0011] Furthermore, the locking section is provided with a flat square for the tool to turn the rotating ring.

[0012] Furthermore, the semi-ring is provided with screws, and the small section of the head connector body is provided with screw holes. The semi-ring is fixed to the head connector body by the screws engaging with the screw holes.

[0013] Furthermore, there are two semi-rings, which are fixed to the head connector body.

[0014] Furthermore, the head connector body has two sets of seals on its large section, and the opening of the wire hole is located between the two sets of seals.

[0015] Furthermore, a sealing element is also provided on a small section of the head connector body, and the sealing element is used to seal and connect the connector to the electronic instrument housing.

[0016] Furthermore, multiple first water passage holes are distributed circumferentially within the head connector body.

[0017] Furthermore, the opening of the first water passage hole on the middle section of the head connector body is located between the rotating ring and the large section.

[0018] Furthermore, both the rotating ring and the semi-ring are fixed to the head connector body by multiple circumferentially distributed screws.

[0019] Furthermore, the tail assembly includes two wing connector bodies, a semi-ring, a baffle, and a rotating ring; The two-wing connector body is provided with a transmission shaft that runs through the axis, and the signal board assembly transmits data to the conventional MWD through the transmission shaft; The outer circumference of the two-wing connector body is stepped, including a large section, a middle section and a small section connected in sequence; the small section is provided with a positioning plane, which cooperates with the positioning plane provided on the electronic instrument shell to achieve axial and circumferential positioning; the large section is provided with two radially protruding wing flanges, which engage with the grooves provided in the outer tube to restrict circumferential rotation. The rotating ring is rotatably mounted on the middle section, and the rotating ring is provided with threads for connecting to the electronic instrument housing; one end of the rotating ring contacts the stepped end face of the two-wing connector body, and the other end is provided with a baffle and the half ring, the half ring is fixed on the small section, and the rotating ring is axially limited by the baffle.

[0020] Furthermore, the rotating ring includes a threaded section and a locking section; the threaded section is used to connect with the housing of the electronic instrument, the locking section is provided with a screw, and the middle section of the two-wing connector body is provided with circumferentially distributed limiting grooves. The screw is screwed into the limiting grooves, thereby restricting the circumferential rotation of the rotating ring and preventing the threads from loosening.

[0021] Furthermore, the locking section is provided with a flat square for the tool to turn the rotating ring.

[0022] Furthermore, the semi-ring is provided with screws, and the small section of the two-wing connector body is provided with screw holes. The semi-ring is fixed to the two-wing connector body by the screws engaging with the screw holes.

[0023] Furthermore, there are two semi-rings, which are fixed to the two wing connector bodies.

[0024] Furthermore, a transition joint is provided in a large section of the two-wing connector body. The transition joint is connected to the end of the transmission shaft and is used to enable signal docking between the transmission shaft and a conventional MWD system.

[0025] Furthermore, the transition joint includes an outer joint and an inner joint. The outer joint is sealed to the two wing joint bodies, and the inner joint is located inside the outer joint and connected to the transmission shaft. The outer joint is made of non-metallic material, while the inner joint and the transmission shaft are made of metallic material.

[0026] Furthermore, the positioning plane and the two wing flanges are in the same direction as the two wing joint bodies.

[0027] Furthermore, the inner hole of the electronic instrument housing is provided with stepped holes at both ends, and the stepped holes are provided with connecting threads; the outer wall of the electronic instrument housing is provided with a flat square for tools to turn the threads.

[0028] Furthermore, the receiving board assembly is used for amplifying and demodulating the received electromagnetic wave signal, including a multi-stage low-noise amplifier structure, a differential input structure, and a programmable filter; the multi-stage low-noise amplifier structure is used to initially amplify the weak electromagnetic wave signal, and the gain is adjusted to adapt to the signal attenuation characteristics at different depths; the differential input structure is used to suppress common-mode noise interference; the programmable filter is used to filter out interference in the drilling environment and improve the signal-to-noise ratio; and DSP technology is used to realize data acquisition and real-time signal processing of the data, demodulating the effective data.

[0029] Furthermore, the signal board assembly is used to realize data modulation, driving, and signal output, including a data processing unit, a modulation unit, and a driving amplification unit; the data processing unit is used to encode and frame the raw data to generate a digital signal; the modulation unit converts the digital signal into a modulated signal suitable for channel transmission; the driving amplification unit amplifies the modulated signal to meet the requirements of transmission distance and anti-interference.

[0030] The beneficial effects of this invention are as follows: 1. This invention solves the problem of transmitting and receiving near-drill bit measurement data wirelessly across the screw motor. Traditional systems suffer from data delays due to distance lag. This invention, through a sealed connection design of the receiver assembly, reliably transmits the received weak electromagnetic wave signal to the signal board assembly after amplification and demodulation by the receiver board assembly, avoiding signal attenuation and interruption, and improving real-time transmission performance.

[0031] 2. Regarding the connection issue between the receiving sub and the conventional downhole measurement system MWD signal, the receiver assembly uses a head assembly and a tail assembly to be sealed and connected to both ends of the electronic instrument housing, achieving support and fixation inside the outer tube. This ensures that the cable hole connects with the wiring compartment, and the signal board assembly communicates through the tail assembly, preventing misalignment caused by vibration and improving the continuity of signal output.

[0032] 3. This invention solves the problems of miniaturization and strength of the data receiving sub-section structure. The overall diameter of the receiver assembly is adapted to the requirements of small-diameter boreholes in coal mines. The outer tube serves as a support component to transmit drilling power and water. The electronic instrument housing supports the receiver board assembly, battery assembly, and signal board assembly. No additional slotting is required, which reduces the overall weight and improves the compressive strength, making it suitable for the narrow space behind the screw motor.

[0033] 4. The cable connection and wiring port positioning between the receiving antenna and circuit components have been optimized. The cable inside the wiring port of the receiver component connects the receiving antenna component and the receiving board component, and the water passage hole connects to the water cavity, achieving precise alignment and waterproofing. A seal prevents high-pressure water from entering the wiring port, avoiding signal transmission interruptions caused by loose connections. This sealing method significantly improves the reliability of the equipment; even in the high-vibration environment of underground drilling, the alignment accuracy of the connection ports can reach the micrometer level, ensuring unobstructed passage.

[0034] 5. Optimized thread anti-loosening and connection positioning. The rotating ring threaded connection of the head assembly and tail assembly, combined with the screw screwed into the limiting groove, forms a mechanical anti-loosening structure. The screw restricts the circumferential rotation of the rotating ring, preventing signal transmission interruption caused by conventional thread loosening, and improving connection stability by more than 30%. The positioning plane matches the positioning surface of the electronic instrument housing to achieve precise axial and circumferential positioning, ensuring accurate alignment between the wire hole and the junction box, avoiding vibration misalignment, and further improving shock resistance.

[0035] 6. High adaptability and economy. The modular design of the components facilitates assembly and maintenance. The multi-stage low-noise amplifiers and programmable filters in the receiver board assembly assist signal processing, further improving the signal-to-noise ratio (SNR). Compared with large-diameter devices in the oil industry, the receiver assembly of this invention meets the explosion-proof standards for coal mines, has high overall strength, strong anti-interference capabilities, and achieves real-time data processing through DSP technology. In practical applications, this receiver assembly can improve borehole trajectory control accuracy by more than 20%, reduce deviations caused by measurement lag, and significantly reduce drilling costs and safety risks.

[0036] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0037] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein: Figure 1 This is a perspective view of the precisely positioned wireless data receiver of the present invention.

[0038] Figure 2 This is a cross-sectional view of the precisely locatable wireless data receiver in this invention.

[0039] Figure 3 This is a schematic diagram of the installation of the precisely locatable wireless data receiver in this invention.

[0040] Figure 4 This is a cross-sectional view of the head assembly in this invention.

[0041] Figure 5 for Figure 4 The left view.

[0042] Figure 6 This is a perspective view of the head assembly in this invention.

[0043] Figure 7 This is a structural diagram of the head connector body in this invention.

[0044] Figure 8 This is a schematic diagram of the tail assembly in this invention.

[0045] Figure 9 This is a cross-sectional view of the tail assembly in this invention.

[0046] Figure 10 This is a schematic diagram of the electronic instrument casing structure in this invention.

[0047] Figure 11 for Figure 10 Side view.

[0048] Reference numerals: 1-Receiving antenna assembly; 2-Head assembly; 3-Outer tube; 4-Receiving board assembly; 5-Battery assembly; 6-Signal board assembly; 7-Electronic instrument housing; 8-Tail assembly; 201-Head connector body; 201a-Wire passage hole; 201b-Wire passage hole; 201c-First water passage hole; 201d-Second water passage hole; 201e-Positioning plane; 201f-Limiting groove; 201g-Semi-ring mounting groove; 202-Seal; 203-Rotating ring; 204-Fixing screw; 205-Block 206-Half-ring; 207-Screw; 208-Seal; 301-Connector compartment; 701-Tail positioning surface; 702-Head positioning surface; 703-Head connecting thread; 704-Tail connecting thread; 801-Two-wing connector body; 801a-Positioning plane; 801b-Two-wing flange; 801c-Limiting groove; 802-Half-ring; 803-Screw; 804-Baffle; 805-Fixing screw; 806-Rotating ring; 807-Transmission rod; 808-Outer connector; 809-Inner connector. Detailed Implementation

[0049] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0050] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0051] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0052] Example 1 Please see Figures 1-11 This is a precisely positioned wireless data receiver, housed within the outer tube 3 of the near-drill bit data receiving section. The receiver includes a head assembly 2, a receiver board assembly 4, a battery assembly 5, a signal board assembly 6, an electronic instrument housing 7, and a tail assembly 8. The head assembly 2 and tail assembly 8 are respectively sealed and connected to both ends of the electronic instrument housing 7, and supported within the outer tube 3 by the head assembly 2 and tail assembly 8. The head assembly 2 has cable passage holes 201a and 201b and water passage holes 201c and 201d, forming a water passage cavity between the electronic instrument housing 7 and the outer tube 3. The water passage holes 201c and 201d communicate with the water passage cavity. The receiver board assembly 4, battery assembly 5, and signal board assembly 6 are electrically connected to each other and are all housed within the electronic instrument housing 7. The receiver board assembly 4 is connected to the receiving antenna assembly 1 of the near-drill bit data receiving section via a cable in cable passage hole 201a, and the signal board assembly 6 communicates with conventional MWD data via the tail assembly 8.

[0053] The head assembly 2 includes a head connector body 201, a rotating ring 203, a baffle 205, and a semi-ring 206. The head connector body 201 is located inside the outer tube 3 of the near-drill bit data receiver, and electronic instruments are also installed inside the outer tube 3 of the near-drill bit data receiver. The outer circle of the head connector body 201 is stepped, including a large section, a middle section, and a small section connected in sequence. The small section has a positioning plane 201e, which cooperates with the positioning plane 702 on the electronic instrument housing 7 to achieve axial and circumferential positioning. The outer circle of the large section has a sealing element 208, which is sealed to the outer tube 3 of the near-drill bit data receiver. One end of the wire hole 201a extends axially along the head connector body 201 to the end face of the small section and communicates with the inner cavity of the electronic instrument housing 7. The other end extends radially along the head connector body 201 to the outer circle of the large section and communicates with the wiring compartment 301 on the outer tube 3. The water passage includes a first water passage 201c and a second water passage 201d; one end of the first water passage 201c extends axially along the head connector body 201 to the end face of the large section and communicates with the water passage inner hole of the receiving antenna assembly 1 at the front end of the outer tube 3, and the other end extends radially along the head connector body 201 to the outer circle of the middle section and communicates with the water passage cavity between the outer tube 3 and the electronic instrument housing 7; the second water passage 201d is located outside the first water passage 201c, and the second water passage... 201d is waist-shaped and directly penetrates both ends of the large section of the head connector body 201; the rotating ring 203 is rotatably fitted on the middle section, and the rotating ring 203 is provided with threads for connecting with the electronic instrument housing 7; one end of the rotating ring 203 contacts the stepped end face of the head connector body 201, and the other end is provided with a baffle 205 and a half ring 206. The half ring 206 is fixed in the half ring mounting groove 201g on the small section, and the rotating ring 203 is axially limited by the baffle 205.

[0054] The rotating ring 203 includes a threaded section and a locking section. The threaded section is used to connect with the electronic instrument housing 7. The locking section is equipped with a fixing screw 204. The middle section of the head connector body 201 has circumferentially distributed limiting grooves 201f. The fixing screw 204 is screwed into the limiting grooves 201f, thereby limiting the circumferential rotation of the rotating ring 203 and preventing the threads from loosening. The locking section has a flat square for using a tool to tighten the rotating ring 203. The half-ring 206 is equipped with a screw 207. The small section of the head connector body 201 has a screw hole. The half-ring 206 is fixed to the head connector body 201 by the screw 207 engaging with the screw hole. There are two half-rings 206, which are fixed to the head connector body 201. The large section of the head connector body 201 has two sets of seals 208. The opening of the wire hole 201a is located between the two sets of seals 208. A sealing element 202 is also provided on the small section of the head connector body 201, and is sealed to the electronic instrument housing 7 through the sealing element 202. Multiple first water passage holes 201c are distributed circumferentially within the head connector body 201. The opening of the first water passage hole 201c on the middle section of the head connector body 201 is located between the rotating ring 203 and the large section. Both the rotating ring 203 and the semi-ring 206 are fixed to the head connector body 201 by multiple circumferentially distributed screws 207. The positioning plane 201e and the large section sealing element 208 are in the same direction as the head connector body 201.

[0055] The tail assembly 8 includes two-wing connector bodies 801, a semi-ring 802, a baffle 804, and a rotating ring 806. The two-wing connector bodies 801 have an axially penetrating transmission shaft 807, through which the signal board assembly 6 transmits data to the conventional MWD. ​​The outer circumference of the two-wing connector bodies 801 is stepped, comprising a large section, a middle section, and a small section connected in sequence. The small section has a positioning plane 801a, which mates with the tail positioning surface 701 on the electronic instrument housing 7 to achieve axial and circumferential positioning. The large section has radially protruding two-wing flanges 801b, which engage with the grooves inside the outer tube 3 to restrict circumferential rotation; the rotating ring 806 is rotatably fitted onto the middle section, and the rotating ring 806 has threads for connecting to the electronic instrument housing 7; one end of the rotating ring 806 contacts the stepped end face of the two-wing connector body 801, and the other end is provided with a baffle 804 and a half ring 802. The half ring 802 is fixed to the small section, and the baffle 804 axially limits the rotating ring 806.

[0056] The rotating ring 806 includes a threaded section and a locking section. The threaded section is used to connect with the electronic instrument housing 7. The locking section is equipped with a screw 805. The middle section of the two-wing connector body 801 has circumferentially distributed limiting grooves 801c. The screw 805 is screwed into the limiting grooves 801c, thereby limiting the circumferential rotation of the rotating ring 806 and preventing the threads from loosening. The locking section has a flat square for using a tool to tighten the rotating ring 806. The half-ring 802 is equipped with a screw 803. The small section of the two-wing connector body 801 has screw holes. The half-ring 802 is fixed to the two-wing connector body 801 by the screw 803 engaging with the screw holes. There are two half-rings 802, which are fixed to the two-wing connector body 801. The large section of the two-wing connector body 801 has transition joints 808 and 809. The transition joints 808 and 809 are connected to the end of the transmission shaft 807 for signal docking between the transmission shaft 807 and a conventional MWD system. The transition joint 808 includes an outer joint and an inner joint. The outer joint is sealed to the two-wing joint body 801, and the inner joint is located inside the outer joint and connected to the transmission shaft 807. The outer joint is made of non-metallic material, while the inner joint and the transmission shaft 807 are made of metallic material. The positioning plane 801a and the two-wing flange 801b are in the same direction on the two-wing joint body 801. The inner hole of the electronic instrument housing 7 has stepped holes at both ends, and the stepped holes have connecting threads 703 and 704. The outer wall of the electronic instrument housing 7 has a flat square for tools to tighten the threads.

[0057] The electronic instrument housing 7 is equipped with a vibration damping sealing ring and a shock-absorbing pad for vibration damping of the receiving board assembly 4, battery assembly 5, and signal board assembly 6. The vibration damping sealing ring is located between the receiving board assembly 4 and the electronic instrument housing 7, the shock-absorbing pad is located at the bottom of the battery assembly 5, and the vibration damping sealing ring is located between the signal board assembly 6 and the electronic instrument housing 7. The shock-absorbing pad has a thickness of 2-5mm and fits precisely against the inner wall of the electronic instrument housing 7 with a gap of less than 0.3mm. The ends of the cable holes 201a and 201b are provided with tapered guide grooves with a cone angle of 20°-30° to facilitate cable insertion. There are 7 water holes 201c distributed circumferentially to further increase the water flow cross-sectional area. In the strong vibration environment of underground coal mines, when the receiving antenna assembly 1 transmits signals through the cable holes 201a and 201b, the rubber material of the vibration damping sealing ring and the vibration damping pad absorbs the vibration energy, with an attenuation rate of over 25%, protecting the amplifier circuit of the receiving board assembly 4 from interference; the tapered guide groove guides the cable to align with the battery assembly 5 and the signal board assembly 6, avoiding misalignment caused by manual adjustment; at the same time, the connecting threads 703 and 704 strengthen the mechanical fixation, withstand 15g acceleration without loosening, and ensure the continuity of the water passage holes 201c and 201d.

[0058] The receiver board assembly 4 is used for amplifying and demodulating the received electromagnetic wave signals, including a multi-stage low-noise amplifier structure, a differential input structure, and a programmable filter. The multi-stage low-noise amplifier structure is used to initially amplify weak electromagnetic wave signals, and the gain is adjusted to adapt to the signal attenuation characteristics at different depths. The differential input structure is used to suppress common-mode noise interference. The programmable filter is used to filter out interference in the drilling environment and improve the signal-to-noise ratio. DSP technology is used to realize data acquisition and real-time signal processing of data, and demodulate the effective data.

[0059] Signal board assembly 6 is used to implement data modulation, driving and signal output, including a data processing unit, a modulation unit and a drive amplification unit; the data processing unit is used to encode and frame the raw data to generate digital signals; the modulation unit converts the digital signals into modulated signals suitable for channel transmission; the drive amplification unit amplifies the modulated signals to meet the requirements of transmission distance and anti-interference.

[0060] During assembly, the operator places the receiver board assembly 4, battery assembly 5, and signal board assembly 6 into the electronic instrument housing 7 and secures them via electrical connections. The head assembly 2 and tail assembly 8 are sealed and connected to both ends of the electronic instrument housing 7, supporting the insertion into the outer tube 3. This ensures that the water passage holes 201c and 201d are connected to the water cavity, and the wire passage hole 201a is connected to the wiring compartment 301, providing cable and water passage channels. The receiver assembly is placed entirely inside the outer tube 3, with the tail two-wing flange 801b engaging the groove to restrict circumferential rotation. The wiring hole aligns with the wiring compartment 301, ensuring that the signal from the receiving antenna assembly 1 is transmitted to the receiver board assembly 4 through the wire passage hole 201a, preventing loosening of connections or water seepage due to underground vibration. When maintenance is required, the threaded connections 703 and 704 are loosened to facilitate disassembly of the electronic instrument housing 7. The entire process requires no special tools; only a standard wrench is needed to complete the connection or separation.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A precisely positionable wireless data receiver, wherein the precisely positionable wireless data receiver is disposed within the outer tube of a near-drill bit data receiving section, characterized in that: The precisely locatable wireless data receiver includes a head assembly, a receiver board assembly, a battery assembly, a signal board assembly, an electronic instrument housing, and a tail assembly. The head assembly and tail assembly are respectively sealed and connected to both ends of the electronic instrument housing, and are supported in the outer tube by the head assembly and tail assembly; the head assembly is provided with a wire hole and a water hole, and a water passage cavity is formed between the electronic instrument housing and the outer tube; the water hole communicates with the water passage cavity; The receiver board assembly, battery assembly, and signal board assembly are electrically connected to each other and are all housed within the electronic instrument housing. The receiver board assembly is connected to the receiving antenna assembly of the near-drill bit data receiving section via a cable in the through-hole, and the signal board assembly communicates with conventional MWD data via the tail assembly.

2. The precisely positioned wireless data receiver according to claim 1, characterized in that: The head assembly includes a head connector body, a rotating ring, a baffle, and a semi-ring; The head connector is located inside the outer tube of the near-drill bit data receiver, and electronic instruments are also installed inside the outer tube of the near-drill bit data receiver. The outer circumference of the head connector is stepped, including a large section, a middle section, and a small section connected in sequence. The small section is provided with a positioning plane, which cooperates with the positioning plane provided on the housing of the electronic instrument to achieve axial and circumferential positioning. The outer circumference of the large section is provided with a sealing element, which is sealed to the outer tube of the near-drill bit data receiver. One end of the wire hole extends axially along the head connector body to the end face of the small section and communicates with the inner cavity of the electronic instrument housing. The other end extends radially along the head connector body to the outer circle of the large section and communicates with the wiring compartment on the outer tube.

3. The precisely positioned wireless data receiver according to claim 2, characterized in that: The water passage includes a first water passage and a second water passage; one end of the first water passage extends axially along the head connector body to the end face of the large section and communicates with the water passage inner hole of the receiving antenna assembly at the front end of the outer tube, and the other end extends radially along the head connector body to the outer circle of the middle section and communicates with the water passage cavity between the outer tube and the electronic instrument housing; the second water passage is located outside the first water passage, and the second water passage is waist-shaped and directly penetrates both ends of the large section of the head connector body; The rotating ring is rotatably mounted on the middle section, and the rotating ring is provided with threads for connecting to the electronic instrument housing; one end of the rotating ring contacts the stepped end face of the head connector body, and the other end is provided with the baffle and half ring, the half ring is fixed on the small section, and the baffle limits the axial movement of the rotating ring.

4. The precisely positioned wireless data receiver according to claim 3, characterized in that: The rotating ring includes a threaded section and a locking section; the threaded section is used to connect with the housing of the electronic instrument, and the locking section is provided with a screw. The middle section of the head connector body is provided with circumferentially distributed limiting grooves. The screw is screwed into the limiting grooves, thereby limiting the circumferential rotation of the rotating ring and preventing the threads from loosening.

5. The precisely positioned wireless data receiver according to claim 4, characterized in that: The locking section is provided with a flat square for the tool to turn the rotating ring.

6. The precisely positioned wireless data receiver according to claim 2, characterized in that: The semi-ring is provided with screws, and the small section of the head connector body is provided with screw holes. The semi-ring is fixed to the head connector body by the screws engaging with the screw holes.

7. The precisely positioned wireless data receiver according to claim 6, characterized in that: There are two semi-rings, which are fixed to the head connector body.

8. The precisely positioned wireless data receiver according to claim 2, characterized in that: The head connector body has two sets of seals on its large section, and the opening of the wire hole is located between the two sets of seals.

9. The precisely positioned wireless data receiver according to claim 2, characterized in that: The head connector body is also equipped with a sealing element on a small section, and is sealed to the electronic instrument housing through the sealing element.

10. The precisely positioned wireless data receiver according to claim 3, characterized in that: The first water passage hole is distributed in multiple circumferences within the head connector body.

11. The precisely positioned wireless data receiver according to claim 3, characterized in that: The opening of the first water passage hole on the middle section of the head connector body is located between the rotating ring and the large section.

12. The precisely positioned wireless data receiver according to claim 2, characterized in that: Both the rotating ring and the semi-ring are fixed to the head connector body by multiple circumferentially distributed screws.

13. The precisely positioned wireless data receiver according to claim 1, characterized in that: The tail assembly includes two wing connector bodies, a semi-ring, a baffle, and a rotating ring; The two-wing connector body is provided with a transmission shaft that runs through the axis, and the signal board assembly transmits data to the conventional MWD through the transmission shaft; The outer circumference of the two-wing connector body is stepped, including a large section, a middle section and a small section connected in sequence; the small section is provided with a positioning plane, which cooperates with the positioning plane provided on the electronic instrument shell to achieve axial and circumferential positioning; the large section is provided with two radially protruding wing flanges, which engage with the grooves provided in the outer tube to restrict circumferential rotation. The rotating ring is rotatably mounted on the middle section, and the rotating ring is provided with threads for connecting to the electronic instrument housing; one end of the rotating ring contacts the stepped end face of the two-wing connector body, and the other end is provided with a baffle and the half ring, the half ring is fixed on the small section, and the rotating ring is axially limited by the baffle.

14. The precisely positioned wireless data receiver according to claim 13, characterized in that: The rotating ring includes a threaded section and a locking section; the threaded section is used to connect with the housing of the electronic instrument, and the locking section is provided with screws. The middle section of the two-wing connector body is provided with circumferentially distributed limiting grooves. The screws are screwed into the limiting grooves, thereby limiting the circumferential rotation of the rotating ring and preventing the threads from loosening.

15. The precisely positioned wireless data receiver according to claim 14, characterized in that: The locking section is provided with a flat square for the tool to turn the rotating ring.

16. The precisely positioned wireless data receiver according to claim 13, characterized in that: The semi-ring is provided with screws, and the small section of the two-wing connector body is provided with screw holes. The semi-ring is fixed to the two-wing connector body by the screws engaging with the screw holes.

17. The precisely positioned wireless data receiver according to claim 16, characterized in that: There are two semi-rings, which are fixed to the two wing connector bodies.

18. The precisely positioned wireless data receiver according to claim 13, characterized in that: The two-wing connector body has a transition connector in a large section. The transition connector is connected to the end of the transmission shaft and is used to connect the transmission shaft to a conventional MWD system for signal interface.

19. The precisely positioned wireless data receiver according to claim 18, characterized in that: The transition joint includes an outer joint and an inner joint. The outer joint is sealed to the two wing joint bodies. The inner joint is located inside the outer joint and is connected to the transmission shaft. The outer joint is made of non-metallic material, while the inner joint and the transmission shaft are made of metallic material.

20. The precisely positioned wireless data receiver according to claim 13, characterized in that: The positioning plane and the two wing flanges are in the same direction as the two wing joint bodies.

21. The precisely positioned wireless data receiver according to claim 1, characterized in that: The inner hole of the electronic instrument housing has stepped holes at both ends, and the stepped holes have connecting threads; the outer wall of the electronic instrument housing has a flat square for tools to turn the threads.

22. The precisely positioned wireless data receiver according to claim 1, characterized in that: The receiving board assembly is used for amplifying and demodulating the received electromagnetic wave signals, including a multi-stage low-noise amplifier structure, a differential input structure, and a programmable filter. The multi-stage low-noise amplifier structure is used to initially amplify weak electromagnetic wave signals, and the gain is adjusted to adapt to the signal attenuation characteristics at different depths. The differential input structure is used to suppress common-mode noise interference. The programmable filter is used to filter out interference in the drilling environment and improve the signal-to-noise ratio. DSP technology is used to realize data acquisition and real-time signal processing, demodulating the effective data.

23. The precisely positioned wireless data receiver according to claim 1, characterized in that: The signal board assembly is used to realize data modulation, driving and signal output, including a data processing unit, a modulation unit and a driving amplification unit; the data processing unit is used to encode and frame the raw data to generate a digital signal; the modulation unit converts the digital signal into a modulated signal suitable for channel transmission; the driving amplification unit amplifies the power of the modulated signal to meet the requirements of transmission distance and anti-interference.

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