Well logging while drilling system

Abstract

The invention discloses a logging while drilling system. Wherein the lower end of the transmitter is connected with a drill bit, the upper end of the transmitter is connected with a screw drilling tool, the transmitter is used for transmitting logging data measured by a near drill bit to a logging-while-drilling component above the screw drilling tool, and the distance between a measuring point and the drill bit is smaller than a preset distance; the lower end of the receiver is connected with the screw drill, the upper end of the receiver is connected with the logging-while-drilling component, and the receiver is used for receiving the logging data and sending the logging data to the ground processor; and after the logging data are received by the ground processor, the logging data are processed to obtain a drilling strategy. The technical problem that a conventional logging-while-drilling system in the related technology cannot meet the service requirement of an ultrathin oil layer drilling technology due to the fact that the distance between a measured stratum data measuring point and the well bottom is a part of zero length and the transmission speed is low is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of oil and gas logging, and in particular to a logging while drilling system. Background Art

[0002] As the development of oil fields enters the later stage, the oil layers are becoming thinner and thinner, and the difficulty of mining is gradually increasing. In order to maintain a high oil layer drilling rate in thin oil layers, it is necessary to use near-bit logging while drilling instruments. The conventional logging while drilling system LWD cannot meet the technical service needs of ultra-thin oil layer drilling because the measurement point of the formation data has a zero length of 10-15m from the bottom of the well, the transmission speed is slow, the bit error rate is high, and the inclination deviation is large. Only by using near-bit logging while drilling instruments with very short measurement parameter zero length can the ultra-thin oil layer drilling rate be effectively improved.

[0003] Currently, no effective solution has been proposed for the problem that the conventional logging while drilling system in the above-mentioned related technologies cannot meet the technical service requirements of ultra-thin oil layer drilling because the measuring points of formation data have a zero distance from the bottom of the well and the transmission speed is slow. Summary of the invention

[0004] The embodiment of the present invention provides a logging while drilling system to at least solve the technical problem that the conventional logging while drilling system in the related art cannot meet the technical service requirements of ultra-thin oil layer drilling because the measuring point of the formation data has a zero length from the bottom of the well and the transmission speed is slow.

[0005] According to one aspect of an embodiment of the present invention, a logging while drilling system is provided, comprising: a transmitter, whose lower end is connected to a drill bit, and whose upper end is connected to a screw drill tool, and is used to transmit logging data measured near the drill bit to a logging while drilling component above the screw drill tool, wherein the distance between the measuring point and the drill bit is less than a predetermined distance; a receiver, whose lower end is connected to the screw drill tool, and whose upper end is connected to the logging while drilling component, and is used to receive the logging data and send the logging data to a ground processor; the ground processor is used to process the logging data after receiving the logging data to obtain a drilling strategy.

[0006] Optionally, the logging while drilling system further includes: a power supply and a power supply control circuit, wherein the power supply is suspended on the inner wall of the non-magnetic housing, and the power supply control circuit is used to control the working state of the power supply.

[0007] Optionally, the transmitter includes: a plurality of sensors for collecting the logging data, wherein the logging data includes at least one of the following: well inclination, azimuth, tool face, bottom resistivity, and natural gamma.

[0008] Optionally, the logging while drilling system also includes: an analog-to-digital conversion module, used to perform analog-to-digital conversion on the logging data to obtain the logging data after analog-to-digital conversion; a directional measuring instrument, used to encode the logging data after analog-to-digital conversion after receiving the logging data after analog-to-digital conversion, obtain a coded signal corresponding to the logging data, and control the action of the pulse generator according to the coded signal to change the mud pressure in the drill string and generate a pressure signal; a pressure sensor, used to measure the pressure signal to obtain the mud signal in the drill string.

[0009] Optionally, the logging while drilling system also includes: a near-drill bit geological guidance component, which is arranged below the screw, and communicates with the short-transmission receiving antenna of the logging while drilling component through a short-transmission transmitting antenna, wherein the short-transmission receiving antenna uses a 12kHZ frequency as the center frequency to modulate and demodulate the signal.

[0010] Optionally, the transmitter includes: a non-magnetic shell for containing the transmitter; a cover plate for cooperating with the non-magnetic shell to dispose the transmitter in the non-magnetic shell; a transmitter for transmitting the logging data; a direction sensor for obtaining the current position information of the drill bit; a high-temperature lithium battery for providing working power for the transmitter; and a short-section communication module for transmitting the logging data together with the transmitter.

[0011] Optionally, the receiver includes: a receiving short section body, used to receive the logging data transmitted by the transmitter; and a circuit cover plate, used to encapsulate the circuit corresponding to the receiver.

[0012] Optionally, the receiver further comprises: a magnetic communication module receiving nipple for communication between the near drill bit and the logging while drilling component.

[0013] Optionally, the receiver and the transmitter use a toroidal transformer to perform bidirectional communication of logging signals.

[0014] Optionally, the logging while drilling system further includes: a display for displaying the logging data.

[0015] In an embodiment of the present invention, a transmitter can be connected to the drill bit at the lower end and the screw drill tool at the upper end, for transmitting the logging data measured near the drill bit to the logging while drilling component above the screw drill tool, wherein the distance between the measuring point and the drill bit is less than the predetermined distance; a receiver can be connected to the screw drill tool at the lower end and the logging while drilling component at the upper end, for receiving the logging data and sending the logging data to the ground processor; and the ground processor can process the logging data after receiving the logging data to obtain a drilling strategy. Through the technical solution provided by the present invention, the borehole trajectory can be corrected in a timely and effective manner according to the formation changes, the reservoir encounter rate can be improved, the oil leakage area can be effectively increased, and the horizontal well production can be improved, thereby solving the technical problem that the conventional logging while drilling system in the related art cannot meet the technical service requirements of ultra-thin oil layer drilling because the measuring point of the formation data is partly zero length away from the bottom of the well and the transmission speed is slow. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 is a schematic diagram of a logging while drilling system according to an embodiment of the present invention;

[0018] Figure 2 is a framework diagram of a near-bit address guidance system according to an embodiment of the present invention;

[0019] Figure 3 is a schematic diagram of a near-bit transmitter according to an embodiment of the present invention;

[0020] Figure 4 is a schematic diagram of a measurement while drilling data transmission system according to an embodiment of the present invention;

[0021] Figure 5 is a schematic diagram of wireless short transmission according to an embodiment of the present invention;

[0022] Figure 6 4 is a schematic diagram showing the working principle of the transceiver coil according to an embodiment of the present invention. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0024] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0025] For the convenience of description, some nouns or terms appearing in the embodiments of the present invention are explained below.

[0026] Logging While Drilling (LWD) is a technology used to obtain formation information in real time during the drilling process. The LWD system usually consists of logging sensors and data acquisition equipment, which can be directly installed on the drill bit or drill string to provide the information required by drilling engineers and geologists by measuring parameters such as formation physical properties, lithology, porosity, etc.

[0027] As introduced in the background technology, the conventional logging while drilling system in the related art cannot meet the technical service requirements of ultra-thin oil layer drilling because the distance between the formation data measuring point and the bottom of the well is partially zero and the transmission speed is slow. In view of the above defects, a logging while drilling system is provided in an embodiment of the present invention.

[0028] According to one aspect of an embodiment of the present invention, a logging while drilling system is provided. Figure 1 is a schematic diagram of a logging while drilling system according to an embodiment of the present invention. Figure 1 As shown, the logging while drilling system may include: a transmitter 101, the lower end of which is connected to the drill bit, and the upper end of which is connected to the screw drill tool, and is used to transmit the logging data measured near the drill bit to the logging while drilling component above the screw drill tool, wherein the distance between the measuring point and the drill bit is less than a predetermined distance; a receiver 103, the lower end of which is connected to the screw drill tool, and the upper end of which is connected to the logging while drilling component, and is used to receive the logging data and send the logging data to a ground processor; a ground processor 105, which is used to process the logging data after receiving it to obtain a drilling strategy.

[0029] As can be seen from the above, the near-drill-bit logging instrument of the drilling system provided by the embodiment of the present invention may include a transmitting assembly and a receiving assembly. The lower end of the transmitting assembly is connected to the drill bit, and the upper end is connected to the screw drill. The lower end of the receiving assembly is connected to the screw drill, and the upper end is connected to a conventional logging while drilling component. After the logging data is transmitted to the ground processor through the transmitter and the receiver, the ground processor can be used to process the logging data to obtain a drilling strategy.

[0030] It should be noted that in the embodiment of the present invention, the measuring point is less than 1 meter away from the drill bit, which can timely and effectively correct the wellbore trajectory according to the formation changes, improve the reservoir drilling rate, effectively increase the oil leakage area, and improve the horizontal well production.

[0031] Therefore, the above-mentioned technical solution provided by the embodiment of the invention solves the technical problem that the conventional logging while drilling system in the related technology cannot meet the technical service requirements of ultra-thin oil layer drilling because the measuring point of the formation data has a zero length from the bottom of the well and the transmission speed is slow.

[0032] Figure 2 is a framework diagram of a near-bit address guidance system according to an embodiment of the present invention, such as Figure 2 As shown in the figure, the near-bit measurement while drilling instrument consists of two parts: a transmitter and a receiver. The lower end of the transmitter is connected to the drill bit, and the upper end is connected to the screw drill tool; the lower end of the receiver is connected to the screw drill tool, and the upper end is connected to the conventional LWD. The downhole wireless short transmission technology is used to transmit the data measured near the drill bit to the conventional LWD above the screw drill tool in real time. The near-bit transmitter can perform inclination, master, resistivity, and azimuth GAM (gamma) measurements.

[0033] According to the above embodiment of the present invention, the logging while drilling system may further include: a power supply and a power supply control circuit, wherein the power supply is suspended on the inner wall of the non-magnetic housing, and the power supply control circuit is used to control the working state of the power supply.

[0034] In this embodiment, the main control part of the near-bit transmitter may include a battery and a circuit board for controlling the battery. The system is powered by lithium batteries. Two specially designed high-temperature lithium batteries are suspended on the inner wall of the non-magnetic housing of the near-bit measuring instrument. The total battery capacity is 18AH and can work underground for more than 300 hours. The lithium battery can work normally in an environment of 140MPA and 175℃, and can meet the operation requirements of high-temperature and high-pressure wells.

[0035] According to the above embodiment of the present invention, the transmitter may include: a plurality of sensors for collecting logging data, wherein the logging data includes at least one of the following: well inclination, azimuth, tool face, bottom resistivity, and natural gamma.

[0036] In this embodiment, a number of sensors for data acquisition are installed in the near-bit transmitter part to collect engineering information such as well inclination, azimuth, tool face, and geological parameters such as formation resistivity and natural gamma.

[0037] Since the screw drill cannot pass through the wire, the signal of the near-bit instrument can only be sent wirelessly, passing through the screw drill to the upper receiver, and then transmitted to the ground by mud communication, etc. This can obtain downhole acquisition information more timely and accurately.

[0038] Figure 3 is a schematic diagram of a near-bit transmitter according to an embodiment of the present invention. Figure 3 As shown, it can include power supply system, azimuth gamma, tool face and well deviation, resistivity and short transmission communication. In addition, it also includes: non-magnetic housing, cover plate, emitter, direction sensor, high temperature lithium battery, etc.

[0039] According to the above-mentioned embodiment of the present invention, the logging while drilling system may further include: an analog-to-digital conversion module, which is used to perform analog-to-digital conversion on the logging data to obtain the logging data after analog-to-digital conversion; a directional measuring instrument, which is used to encode the logging data after analog-to-digital conversion after receiving the logging data after analog-to-digital conversion, obtain a coded signal corresponding to the logging data, and control the action of the pulse generator according to the coded signal to change the mud pressure in the drill string and generate a pressure signal; a pressure sensor, which is used to measure the pressure signal to obtain the mud signal in the drill string.

[0040] In this embodiment, signal transmission is one of the key technologies of the logging while drilling system. When the downhole instrument is working, the logging while drilling system measures engineering information such as well inclination, azimuth, tool face, and geological parameters such as formation resistivity and natural gamma. After A / D conversion, the signal is transmitted to the data controller unit of the directional measuring instrument for encoding. The directional measuring instrument controls the pulse generator to produce an action according to the modulated coded signal, so that the mud pressure in the drill string changes accordingly. The pressure sensor at the riser measures these pressure changes to obtain the original mud pulse signal, and then the ground processor is responsible for signal acquisition and front-end processing, and finally transmitted to the ground host to calculate the parameters while drilling by the ground software system.

[0041] According to the above embodiment of the present invention, the logging while drilling system also includes: a near-drill bit geological guidance component, which is arranged below the screw, and communicates with the short-transmission receiving antenna of the logging while drilling component through the short-transmission transmitting antenna, wherein the short-transmission receiving antenna uses 12kHZ frequency as the center frequency to modulate and demodulate the signal.

[0042] Figure 4 is a schematic diagram of a measurement while drilling data transmission system according to an embodiment of the present invention. Figure 4As shown, after the downhole tool collects data, the coded data is obtained, and then the coded data is transmitted to the wellhead, the pressure data is sensed by the pressure sensor, and then reaches the ground explosion-proof machine, then enters the ground data collection box, and finally reaches the ground decoder.

[0043] According to the above-mentioned embodiment of the present invention, the transmitter may include: a non-magnetic shell for containing the transmitter; a cover plate for cooperating with the non-magnetic shell to place the transmitter in the non-magnetic shell; a transmitter for transmitting logging data; a direction sensor for obtaining the current position information of the drill bit; a high-temperature lithium battery for providing working power for the transmitter; and a short-section communication module for transmitting logging data together with the transmitter.

[0044] In this embodiment, the near-drill bit transmitter part may include: a non-magnetic housing, a cover plate, a transmitter, a direction sensor, an azimuth gamma, a high-temperature lithium battery, a short-distance communication module, and the like.

[0045] According to the above embodiment of the present invention, the receiver includes: a receiving sub body for receiving the logging data transmitted by the transmitter; and a circuit cover for packaging the circuit corresponding to the receiver.

[0046] In this embodiment, the receiver part mainly includes: a receiving short section body, a circuit cover, a magnetic communication module assembly, a magnetic communication module receiving short section assembly, a receiver end magnetic strip, a receiving antenna sleeve, a receiving circuit, etc.

[0047] In the above embodiment, the receiver further comprises: a magnetic communication module receiving nipple for communication between the near-drilling bit and the logging while drilling component.

[0048] In this embodiment, the magnetic communication module receiving short section assembly is a bridge for the near-bit instrument to connect to the conventional LWD upward, including a mechanical interface conversion joint and an electrical interface ten-core pin.

[0049] According to the above embodiment of the present invention, the receiver and the transmitter use a toroidal transformer to perform bidirectional communication of logging signals.

[0050] Figure 5 is a schematic diagram of wireless short transmission according to an embodiment of the present invention, such as Figure 5 As shown in the figure, the near-bit transmitter and receiver use a toroidal transformer for two-way communication of logging signals. The upper and lower communication instrument circuits are similar, but they are different from the interfaces of other instruments. The upper instrument interface is a slave interface, which is connected to the communication circuit of the entire string of instruments; the interface of the near-bit instrument is the master interface, which is connected to other near-bit instruments for control and data acquisition.

[0051] Figure 6 is a schematic diagram of the operation of the transceiver coil according to an embodiment of the present invention. Figure 6As shown in the figure, the instrument uses a toroidal transformer as a transmitting and receiving coil for two-way communication of signals. The same transformer serves as both a transmitting coil and a receiving coil.

[0052] According to the above embodiment of the present invention, the logging while drilling system may further include: a display for displaying the logging data.

[0053] In this embodiment, the display may be a display provided at the ground host computer, which can display the drilling parameters (ie, logging data) in real time, making the entire drilling process more intuitive.

[0054] In the embodiment of the present invention, the near-bit geosteering system is a near-bit geosteering module with a length of 1.2m developed on the basis of a conventional LWD logging while drilling system. The measurement module is installed below the screw and communicates with the short-transmission receiving antenna of the LWD logging while drilling system through the short-transmission transmitting antenna on it. The data short-transmission antenna uses a 12kHZ frequency as the center frequency to modulate and demodulate the signal. The near-bit main control sends a command to control the transmitting antenna to be energized, and the metal pipe wall generates current. The receiving antenna receives the current demodulation signal on the pipe wall.

[0055] Since in the embodiment of the present invention, the near-drill-bit instrument (composed of a transmitter and a receiver) has a well inclination, azimuth, tool face, resistivity, and gamma measurement point less than 1 meter away from the drill bit, the problem of parameter measurement lag caused by the existing measurement point being too far from the drill bit is successfully solved. In addition, since the measurement point is less than 1 meter away from the drill bit, the borehole trajectory can be corrected in a timely and effective manner according to the formation changes, the reservoir encounter rate can be improved, the oil leakage area can be effectively increased, and the horizontal well production can be improved. The instrument is connected to the drill bit, and the measurement point is less than 1 meter away from the drill bit. The near-drill-bit geological parameters and trajectory parameters can be obtained in real time, and the relationship between the borehole trajectory and the formation can be clearly determined, and the oil hole trajectory can be adjusted in time to drill toward the optimal position of the reservoir. Since the drilling direction can be adjusted in time, the borehole surface can be smooth and flat, saving operation time and extending the service life of the instrument. Moreover, it has filtering, signal amplification, and anti-interference functions, which can reduce the bit error rate, meet the technical service needs of ultra-thin oil layer drilling wells well, and improve the oil production of horizontal wells.

[0056] The logging while drilling system provided by the embodiment of the present invention has the main technical features of the near-bit geological parameters and engineering parameters while drilling measurement, transmission, information interpretation, and decision control, which can effectively improve the oil and gas layer drilling rate and reduce the drilling cost. It has the following beneficial effects: 1) The distance between the well inclination, azimuth, tool face, resistivity, and gamma measurement points and the drill bit is less than 2 meters, which solves the problem of parameter measurement lag caused by the existing measurement points being too far away from the drill bit; 2) The measurement point is less than 2 meters away from the drill bit, which can timely and effectively correct the borehole trajectory according to the formation changes, improve the oil reservoir drilling rate, effectively increase the oil leakage area, and increase the horizontal well production; 3) It is composed of a transmitter, a direction sensor, an azimuth gamma, etc., which can clearly determine the relationship between the borehole trajectory and the formation, and timely adjust the oil hole trajectory to drill towards the optimal position of the oil reservoir; 4) Since the drilling direction can be adjusted in time, the borehole surface can be smooth and flat, saving operation time and extending the service life of the instrument; 5) It has filtering, signal amplification, and anti-interference functions, which can reduce the bit error rate, well meet the technical service needs of ultra-thin oil layer drilling, and improve the oil production of horizontal wells. The following problems were effectively solved: 1) The conventional LWD logging system has a large measurement blind area. The resistivity measurement point is 8-9 meters away from the drill bit, the gamma measurement point is 13-15 meters away from the drill bit, and the well inclination and azimuth measurement points are 17-21 meters away from the drill bit. The measurement of wellbore trajectory parameters is relatively delayed, and the prediction of bottom hole engineering data is very difficult, and the direction of the wellbore trajectory cannot be accurately predicted; 2) Since the measurement point for formation data is 10-15 meters away from the bottom of the well, the wellbore trajectory cannot be corrected in time and effectively according to the formation changes, resulting in a low reservoir encounter rate, and the inability to effectively increase the oil leakage area and improve the production of horizontal wells; 3) There is no accurate azimuth measurement, only relying on the average value, and the relationship between the wellbore trajectory and the formation cannot be clearly determined, resulting in the oil well trajectory not being located at the best position in the reservoir; 4) The large inclination deviation leads to an uneven wellbore trajectory, which seriously affects the service life of the instrument string and increases the operating cost and time; 5) The bit error rate is high, which cannot meet the technical service needs of ultra-thin oil layer drilling and improve the production of horizontal wells.

[0057] From the above analysis, it can be seen that the technical solution provided by the embodiment of the present invention uses downhole wireless short transmission technology to transmit the data measured near the drill bit in real time to the conventional LWD above the screw drill. Since the near drill bit is directly connected to the drill bit, the measurement point for measuring the formation data has a zero length of 2m from the bottom of the well, so the signal upload speed is faster and the collected data is more accurate. The ground receiver receives the parameters such as well inclination, tool face, resistivity, and azimuth gamma imaging measured near the drill bit, and uploads them to the control software after processing by the processor. The control software modifies the wellbore trajectory in real time, adjusts the drilling direction, and makes the instrument string accurately hit the center of the target, thereby improving the drilling rate of the oil layer.

[0058] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0059] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0060] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. 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 mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0061] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0062] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0063] If the 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 invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.

[0064] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A logging while drilling system, characterized in that: include: A transmitter, the lower end of which is connected to the drill bit, and the upper end of which is connected to the screw drill, for transmitting the logging data measured near the drill bit to the logging while drilling component above the screw drill, wherein the distance between the measuring point and the drill bit is less than a predetermined distance; A receiver, the lower end of which is connected to the screw drill tool, the upper end of which is connected to the logging while drilling component, and is used to receive the logging data and send the logging data to a ground processor; The ground processor is used to process the well logging data after receiving the well logging data to obtain a drilling strategy.

2. The logging while drilling system according to claim 1, characterized in that: Also includes: A power supply and a power supply control circuit, wherein the power supply is suspended on the inner wall of a non-magnetic housing, and the power supply control circuit is used to control the working state of the power supply.

3. The logging while drilling system according to claim 1, characterized in that: The transmitter includes: a plurality of sensors for collecting the logging data, wherein the logging data includes at least one of the following: well inclination, azimuth, tool face, bottom resistivity, and natural gamma.

4. The logging while drilling system according to claim 1, characterized in that: Also includes: An analog-to-digital conversion module, used for performing analog-to-digital conversion on the well logging data to obtain the well logging data after analog-to-digital conversion; A directional measuring instrument, which is used to encode the well logging data after analog-to-digital conversion after receiving the well logging data, obtain a coded signal corresponding to the well logging data, and control the action of the pulse generator according to the coded signal to change the mud pressure in the drill string and generate a pressure signal; The pressure sensor is used to measure the pressure signal to obtain the mud signal in the drill string.

5. The logging while drilling system according to claim 1, characterized in that: Also includes: The near-bit geological steering component is arranged below the screw and communicates with the short-transmission receiving antenna of the while-drilling logging component through the short-transmission transmitting antenna, wherein the short-transmission receiving antenna adopts 12 kHz frequency as the center frequency to modulate and demodulate the signal.

6. The logging while drilling system according to claim 3, characterized in that: The transmitter comprises: A non-magnetic housing for containing the transmitter; A cover plate, used to cooperate with the non-magnetic housing to place the transmitter in the non-magnetic housing; A transmitter, used for transmitting the well logging data; A direction sensor is used to obtain the current position information of the drill bit; A high-temperature lithium battery, used to provide working power for the transmitter; The short-joint communication module is used to transmit the well logging data together with the transmitter.

7. The logging while drilling system according to claim 1, characterized in that: The receiver comprises: A receiving short section body, used for receiving the logging data transmitted by the transmitter; The circuit cover is used to encapsulate the circuit corresponding to the receiver.

8. The logging while drilling system according to claim 7, characterized in that: The receiver further comprises: a magnetic communication module receiving nipple for communication between the near drill bit and the logging while drilling component.

9. The logging while drilling system according to claim 1, characterized in that: The receiver and the transmitter use a toroidal transformer to perform bidirectional communication of logging signals.

10. The logging while drilling system according to any one of claims 1 to 9, characterized in that: Also includes: A display is used to display the well logging data.

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