Downhole system while drilling

Abstract

The invention relates to the field of oil drilling equipment, in particular to a logging-while-drilling underground system, and aims to solve the technical problem that multiple times of tripping are needed in the existing drilling process. According to the drilling-while-drilling underground system, the transmitting module and the receiving module are integrated on the non-magnetic drill collar, and the receiving module is electrically connected with the drilling-while-drilling measuring instrument, so that a drilling tool can detect the periphery of a well in real time through the detection short section when the drilling tool is under the well, and ground personnel can know information of an adjacent well in real time through the drilling-while-drilling measuring instrument; therefore, the situation that multiple times of tripping are needed is avoided, normal operation of the adjacent well is not interfered, and early warning can be made for track collision prevention and accurate detection of the adjacent well.

Description

Technical Field

[0001] The invention relates to the field of oil drilling equipment, and in particular to a downhole detection while drilling system. Background Art

[0002] In the process of oil extraction, complex structures such as cluster wells, rescue wells and directional wells require precise while-drilling detection of the distance to adjacent wells before drilling to prevent trajectory collision or to find adjacent well targets.

[0003] The specific drilling process is: instrument detection, after the detection is completed, the drilling tool is lowered into the well, then pulled out of the well, and then the well is again detected in real time by the instrument, and then the well is lowered again, and the well is pulled out again, and the process is repeated until the drilling operation is completed. It can be seen that the existing drilling method requires multiple drilling and pulling out, and the work efficiency is low. Summary of the invention

[0004] The purpose of the present invention is to provide a downhole detection while drilling system to solve the technical problem that the existing drilling process requires multiple trips.

[0005] In order to solve the above technical problems, the technical solution provided by the present invention is:

[0006] The downhole detection while drilling system provided by the present invention comprises: a detection short section and a measurement while drilling instrument connected to the detection short section;

[0007] The detection sub includes a non-magnetic drill collar, a transmitting module and a receiving module;

[0008] Wherein, the transmitting module is arranged in the side wall of the non-magnetic drill collar and includes a transmitting antenna;

[0009] The receiving module is arranged in the side wall of the non-magnetic drill collar and is electrically connected to the measurement while drilling instrument. The receiving module comprises a receiving antenna. The receiving antenna and the transmitting antenna are arranged separately along the axial direction of the non-magnetic drill collar.

[0010] Furthermore, the transmitting module further includes a transmitting circuit board, and the transmitting circuit board is electrically connected to the transmitting antenna;

[0011] The receiving module further includes a receiving circuit board, and the receiving circuit board is electrically connected to the receiving antenna;

[0012] The measurement while drilling instrument comprises an MWD docking circuit board, which is arranged in the side wall of the non-magnetic drill collar and is electrically connected to the receiving circuit board.

[0013] Furthermore, the detection sub also includes a flow guide located in the non-magnetic drill collar, and the flow guide includes a flow guide body and a ten-hole connector;

[0014] Wherein, the guide body is provided with a wire hole penetrating through it, and is connected to the non-magnetic drill collar through a fixing nail;

[0015] The fixing nail is provided with an inner hole penetrating through the fixing nail, and the inner hole is communicated with the wire passing hole;

[0016] The ten-hole connector is connected to the end of the guide body and is electrically connected to the MWD docking circuit board through the wires passing through the wire holes.

[0017] Furthermore, the flow guide body includes a fixed section and a wire section;

[0018] The fixed section is in a circular ring shape and is connected to the non-magnetic drill collar;

[0019] The wire segment is in a rod shape, passes through the fixed segment, and forms a flow passage with the fixed segment. The outer side surface of the wire segment is connected to the inner wall of the fixed segment through a connecting wing.

[0020] Further, the end of the wire segment away from the ten-hole connector is conical;

[0021] The connecting wing extends axially along the fixed section, and its length is shorter than the length of the fixed section. Both ends of the connecting wing are triangular wedge-shaped, and the connecting lines of the two inclined surfaces of each end are connected between the fixed section and the wire section, and the connection between the two inclined surfaces adopts arc transition.

[0022] Furthermore, three circuit board bins are provided on the side wall of the non-magnetic drill collar, the three circuit board bins are spaced apart around the axis of the non-magnetic drill collar, and adjacent circuit board bins are connected via through holes penetrating the bin wall;

[0023] The three circuit board bins are respectively provided with closed bin covers, which are arranged on the openings of the circuit board bins and connected to the non-magnetic drill collars;

[0024] The MWD docking circuit board, the transmitting circuit board and the receiving circuit board are respectively arranged in the three circuit board compartments.

[0025] Furthermore, two antenna compartments are provided on the side wall of the non-magnetic drill collar, and the two antenna compartments are spaced apart and distributed along the axis of the non-magnetic drill collar;

[0026] The two antenna compartments are respectively provided with insulating compartment covers, the insulating compartment covers are arranged on the openings of the antenna compartments and are connected to the non-magnetic drill collars;

[0027] The transmitting antenna and the receiving antenna are separately arranged in the two antenna compartments.

[0028] Furthermore, a shielding compartment is provided on the side wall of the non-magnetic drill collar, the shielding compartment is C-shaped, opposite to the antenna compartment, and extends from the middle of one of the antenna compartments to the middle of the other antenna compartment in the axial direction of the non-magnetic drill collar;

[0029] The shielding chamber corresponds to a shielding cover plate, the shielding cover plate is arranged to cover the opening of the shielding chamber and is connected to the non-magnetic drill collar;

[0030] The detection short section also includes a C-shaped shielding component, and the C-shaped shielding component is arranged in the shielding compartment.

[0031] Furthermore, a shielding chamber is provided on the side wall of the non-magnetic drill collar, the shielding chamber is C-shaped, and two shielding chambers are provided, the two shielding chambers are respectively opposite to the two antenna chambers, and are respectively located in the middle of the two antenna chambers;

[0032] The two shielding chambers are respectively provided with shielding cover plates, the shielding cover plates are arranged on the openings of the shielding chambers and are connected to the non-magnetic drill collars;

[0033] The detection short section also includes two C-shaped shielding components, and the two C-shaped shielding components are respectively arranged in the two shielding compartments.

[0034] Furthermore, at least one wear-resistant belt is provided on the outer wall of the non-magnetic drill collar, and the wear-resistant belt extends along the circumference of the non-magnetic drill collar.

[0035] In summary of the above technical solutions, the technical effects that can be achieved by the downhole detection while drilling system provided by the present invention are:

[0036] The downhole detection while drilling system includes a detection short section and a measurement while drilling instrument connected to the detection short section; the detection short section includes a non-magnetic drill collar, a transmitting module and a receiving module; wherein the transmitting module is arranged in the side wall of the non-magnetic drill collar and includes a transmitting antenna; the receiving module is arranged in the side wall of the non-magnetic drill collar and is electrically connected to the measurement while drilling instrument and includes a receiving antenna, and the receiving antenna and the transmitting antenna are separated and arranged along the axial direction of the non-magnetic drill collar.

[0037] In the downhole detection while drilling system, the transmitting module emits electromagnetic waves through the transmitting antenna, and the receiving antenna is used to receive the electromagnetic waves reflected after contact with the adjacent well. The receiving module processes the electromagnetic waves and then transmits them to the measurement while drilling instrument. The measurement while drilling transmits the data to the ground, thus completing the accurate detection of the distance and direction of the adjacent well.

[0038] It can be seen that compared with the existing technology, the downhole detection while drilling system integrates the transmitting module and the receiving module into the non-magnetic drill collar, and electrically connects the receiving module with the downhole measurement instrument. In this way, the drilling rig can conduct real-time detection of the wellbore periphery through the detection short section when the drilling tool is underground, and the ground personnel can obtain the information of the neighboring wells in real time through the downhole measurement instrument, thus avoiding the need to trip the drill multiple times, and does not interfere with the normal operation of the neighboring wells, and can provide early warning for trajectory collision prevention and accurate detection of neighboring wells. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0040] Figure 1 A schematic structural diagram of an embodiment of a detection sub provided by an embodiment of the present invention;

[0041] Figure 2 A schematic structural diagram of another embodiment of a detection sub provided by an embodiment of the present invention;

[0042] Figure 3 for Figure 1 A longitudinal section view of

[0043] Figure 4 for Figure 1 A cross-sectional view of

[0044] Figure 5 for Figure 3 Schematic diagram of the connection between the middle flow guide and the non-magnetic drill collar;

[0045] Figure 6 for Figure 5 Schematic diagram of the middle deflector;

[0046] Figure 7 for Figure 5 A cross-sectional view of the middle deflector along the A-A' direction;

[0047] Figure 8 A side view of a flow guide body provided in an embodiment of the present invention.

[0048] Icons: 100- non-magnetic drill collar; 200- transmitting antenna; 300- receiving antenna; 400- transmitting circuit board; 500- receiving circuit board; 600- MWD docking circuit board;

[0049] 700-flow guide; 710-flow guide body; 720-ten-hole connector; 730-high-voltage sealing plug; 740-aluminum sleeve; 711-wire hole; 712-fixed section; 713-wire section; 714-flow channel; 715-connecting wing;

[0050] 800-fixing nail; 900-circuit board compartment; 1000-closed compartment cover; 1100-antenna compartment; 1200-insulating compartment cover; 1300-shielding compartment; 1400-shielding cover; 1500-C-type shielding part; 1600-wear-resistant belt; 1700-guide cover. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions 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 part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0052] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0054] The current drilling process is: instrument detection, after the detection is completed, the drilling tool is lowered into the well, then pulled out of the well, and then the well is again detected by the instrument in real time, and then the drill is lowered again, and the drill is pulled out again, and the process is repeated until the drilling operation is completed. It can be seen that the existing drilling method requires multiple drilling and pulling out, and the work efficiency is low.

[0055] In view of this, the present invention provides a downhole detection while drilling system, including a detection pup joint and a measurement while drilling instrument connected to the detection pup joint; the detection pup joint includes a non-magnetic drill collar 100, a transmitting module and a receiving module; wherein the transmitting module is arranged in the side wall of the non-magnetic drill collar 100, and includes a transmitting antenna 200; the receiving module is arranged in the side wall of the non-magnetic drill collar 100, and is electrically connected to the measurement while drilling instrument, and includes a receiving antenna 300, and the receiving antenna 300 and the transmitting antenna 200 are separated and arranged along the axial direction of the non-magnetic drill collar 100.

[0056] In the downhole detection while drilling system, the transmitting module transmits electromagnetic waves outward through the transmitting antenna 200, and the receiving antenna 300 is used to receive the electromagnetic waves reflected after contact with the adjacent well. The receiving module processes the electromagnetic waves and then transmits them to the measurement while drilling instrument. The measurement while drilling instrument transmits the data to the ground, thereby completing the accurate detection of the distance and direction of the adjacent well.

[0057] It can be seen that compared with the existing technology, the downhole detection while drilling system integrates the transmitting module and the receiving module into the non-magnetic drill collar 100, and electrically connects the receiving module with the downhole measurement instrument. In this way, the drilling rig can conduct real-time detection of the wellbore periphery through the detection short section when the drilling tool is underground, and the ground personnel can obtain the information of the neighboring wells in real time through the downhole measurement instrument, thereby avoiding the need to trip the drill multiple times, and does not interfere with the normal operation of the neighboring wells, and can provide early warning for trajectory collision prevention and accurate detection of neighboring wells.

[0058] It should be noted here that the non-magnetic drill collar 100 is a hollow cylinder, the interior of which is used to pass mud; at least one wear-resistant belt 1600 is provided on the outer wall of the non-magnetic drill collar 100, Figure 1 and Figure 2 The wear-resistant belt 1600 extends along the circumference of the non-magnetic drill collar 100 , and a plurality of wear-resistant belts 1600 are distributed at intervals along the axial direction of the non-magnetic drill collar 100 , so as to protect the non-magnetic drill collar 100 .

[0059] The following combination Figures 1 to 8 The structure and shape of the downhole detection while drilling system provided in this embodiment are described in detail:

[0060] For further reference, Figure 3 and Figure 4 The transmitting module also includes a transmitting circuit board 400, which is electrically connected to the transmitting antenna 200; the receiving module also includes a receiving circuit board 500, which is electrically connected to the receiving antenna 300; the measurement while drilling instrument includes an MWD docking circuit board 600, which is arranged in the side wall of the non-magnetic drill collar 100 and is electrically connected to the receiving circuit board 500.

[0061] Specifically, refer to Figures 1 to 3, close to the lower end of the non-magnetic drill collar 100, two antenna compartments 1100 are arranged on the side wall of the non-magnetic drill collar 100, and the two antenna compartments 1100 are distributed in an upper and lower interval, and the distance between the two is as small as possible on the basis of meeting the mechanical design requirements; two insulating compartment covers 1200 respectively cover the openings of the antenna compartments 1100 and are connected to the non-magnetic drill collar 100, and the insulating compartment covers 1200 are made of insulating materials to facilitate the transmission and reception of electromagnetic wave signals; the transmitting antenna 200 is arranged in the antenna compartment 1100 at the bottom, and adopts a willow-shaped planar antenna structure The transmitting antenna 200 adopts an extremely narrow pulse signal source, which is based on the principle of avalanche triode and Marx circuit, and uses the superposition of Marx circuit to achieve the effect of avalanche acceleration. After sharpening capacitor processing, it produces an ultra-wideband extremely narrow pulse signal with high resolution, high repetition rate and extremely small tail; the receiving antenna 300 is arranged in the antenna compartment 1100 above, and also adopts a willow-leaf-shaped planar antenna structure, so that it has higher sensitivity and can effectively receive the reflected electromagnetic waves.

[0062] Reference 1 and Figure 4 , near the upper end of the non-magnetic drill collar 100, three circuit board bins 900 are provided on the side wall of the non-magnetic drill collar 100, and the three circuit board bins 900 are spaced apart around the axis of the non-magnetic drill collar 100, and adjacent circuit board bins 900 are connected by through holes penetrating the bin wall to facilitate wire passing; the three circuit board bins 900 respectively correspond to closed bin covers 1000, the closed bin covers 1000 are covered on the openings of the circuit board bins 900, and are connected to the non-magnetic drill collar 100; the MWD docking circuit board 600, the transmitting circuit board 400 and the receiving circuit board 500 are respectively arranged in the three circuit board bins 900.

[0063] Here, the transmitting circuit board 400 adopts an extremely narrow radar pulse excitation signal circuit, which can generate an extremely narrow pulse signal with high radiation power, low leakage ripple, adjustable repetition frequency and large range, and is connected to the transmitting antenna 200 with a coaxial line; the receiving circuit board 500 adopts a digital control circuit to realize high-speed and high-precision acquisition and demodulation processing of the echo signal, and is connected to the receiving antenna 300 with a coaxial line. Specifically, it adopts time-varying gain equivalent sampling technology to dynamically adjust the sampling frequency and step delay of the system within a certain range, and realizes flexible conditioning of the echo signal through a fixed power amplifier and a programmable gain operational amplifier to ensure that the gain is small when the signal amplitude is high and the gain is large when the signal amplitude is low, thereby realizing balanced sampling of the entire echo signal; the MWD docking circuit board 600 is electrically connected to the deflector 700.

[0064] By adopting the above design, the transmitting antenna 200, the transmitting circuit board 400, the receiving antenna 300, the receiving circuit board 500 and the MWD docking circuit board 600 are reasonably distributed, which is convenient for wiring; in addition, during the drilling process, the transmitting circuit board 400 drives the transmitting antenna 200 to radiate electromagnetic wave signals, and after the electromagnetic waves contact the adjacent wells, they are reflected to the receiving antenna 300, and then the receiving circuit board 500 collects the electromagnetic wave signals, and performs data processing and calculation, and then transmits the data to the MWD docking circuit board 600, and then the guide device 700 transmits the data to other parts of the while drilling measurement instrument, and the while drilling measurement instrument will transmit the data to the ground in time to complete the accurate detection of the distance and direction of the adjacent wells.

[0065] From the above, it can be seen that the downhole detection system while drilling has high detection accuracy and resolution, and does not require multiple trips during drilling. It can break through the minimum logging distance and does not interfere with the normal operation of adjacent wells. It can better provide early warning for trajectory collision prevention and accurate detection of adjacent wells. In addition, the downhole detection system while drilling can provide direction and distance detection and control means for dense cluster wells, which can effectively avoid the risk of wellbore trajectory collision and accurately find adjacent well targets.

[0066] Furthermore, the detection subsection also includes a shielding module. In one embodiment of the present application, refer to Figure 1 and Figure 3 The shielding module includes two C-shaped shielding components 1500, which are made of shielding material; two C-shaped shielding chambers 1300 are also provided on the side wall of the non-magnetic drill collar 100, and the two shielding chambers 1300 are respectively opposite to the two antenna chambers 1100 and are respectively located in the middle position of the two antenna chambers 1100; the two shielding chambers 1300 are respectively provided with shielding cover plates 1400, which are covered on the openings of the shielding chambers 1300 and connected to the non-magnetic drill collar 100, so as to respectively seal the two C-shaped shielding components 1500 in the two shielding chambers 1300.

[0067] In other embodiments, reference Figure 2 The shielding module includes a C-shaped shielding member 1500, which is made of shielding material; a shielding chamber 1300 is also provided on the side wall of the non-magnetic drill collar 100, and the shielding chamber 1300 is C-shaped, opposite to the antenna chamber 1100, and extends from the middle position of one antenna chamber 1100 to the middle position of the other antenna chamber 1100 in the axial direction of the non-magnetic drill collar 100; the shielding chamber 1300 corresponds to a shielding cover plate 1400, which covers the opening of the shielding chamber 1300 and is connected to the non-magnetic drill collar 100, so as to enclose the C-shaped shielding member 1500 in the shielding chamber 1300.

[0068] By adopting the above design, the equivalent distance from the antenna transmitting signal to the main body is increased, and the influence of the main body on the signal is reduced.

[0069] Regarding the deflector 700, specifically:

[0070] refer to Figure 5 and Figure 6 The flow guide 700 includes a flow guide body 710, a ten-hole connector 720, a high-pressure sealing plug 730 and an aluminum sleeve 740; wherein the flow guide body 710 is provided with a wire hole 711 penetrating through it, and is connected to the non-magnetic drill collar 100 through a fixing nail 800; the fixing nail 800 is provided with an inner hole penetrating through it, and the inner hole is connected to the wire hole 711; the ten-hole connector 720 is connected to the end of the flow guide body 710, and is provided through the wire hole 711 The wires are electrically connected to the MWD docking circuit board 600; the high-voltage sealing plug 730 is in the wire hole 711, and one end of it abuts against the step surface of the wire hole 711, and the other end abuts against the aluminum sleeve 740. The ten-hole connector 720 is fixed to the end face of the wire segment 713 by screws, and the aluminum sleeve 740 is pressed tightly; the wires drawn from the side wall of the non-magnetic drill collar 100 are connected to the high-voltage sealing plug 730, and the high-voltage sealing plug 730 is electrically connected to the ten-hole connector 720. Here, the high-voltage sealing plug 730 plays a sealing role, avoiding the problem of short circuit of the wires caused by mud entering the wire hole 711, and ensuring the effectiveness of the electrical connection between the ten-hole connector 720 and the non-magnetic drill collar 100.

[0071] refer to Figures 5 to 8 The flow guide body 710 includes a fixed section 712 and a wire section 713; the fixed section 712 is annular and connected to the non-magnetic drill collar 100; the wire section 713 is rod-shaped and penetrates the fixed section 712, and forms a flow channel 714 between the fixed section 712, and the outer side surface of the wire section 713 is connected to the inner wall of the fixed section 712 through a connecting wing 715.

[0072] Continue to refer Figures 5 to 8 The wire holes 711 are distributed in the fixed section 712, the connecting wings 715 and the wire section 713, and are L-shaped as a whole; along the axial direction of the fixed section 712, the outer wall of the fixed section 712 is provided with a plurality of circular grooves, which are distributed on both sides of the fixing nail 800, and a sealing retaining ring is correspondingly provided in the circular groove; the outer wall of the non-magnetic drill collar 100 is recessed inward to form a receiving groove, and the guide cover plate 1700 is covered in the receiving groove and fixedly connected to the non-magnetic drill collar 100, and the wires led out from the non-magnetic drill collar 100 pass through the receiving groove and the inner hole to the wire hole 711.

[0073] By adopting the above design, the wires led out from the MWD docking circuit board 600 are transformed from wall type to shaft type, and the mud can pass through the flow guide 700 from the flow passage 714, thereby avoiding the increase of mud pressure drop.

[0074] refer to Figure 5 and Figure 6The end of the wire segment 713 away from the ten-hole connector 720 is conical, and the vertex thereof adopts an arc transition; Figures 6 to 8 The connecting wing 715 extends along the axial direction of the fixing section 712, and its length is shorter than the length of the fixing section 712. Both ends of the connecting wing 715 are triangular wedge-shaped, and the connecting lines of the two inclined surfaces of each end are connected between the fixing section 712 and the wire section 713. Figure 8 As shown, the connection between the two inclined surfaces along the longitudinal extension adopts arc transition, and the connection between the two inclined surfaces and the fixed section 712 and the wire section 713 also adopts arc transition.

[0075] In the above design, the conductor segment 713 and the connecting wing 715 both play a diversion role, thereby reducing the impact force of mud on the conductor segment 713 when passing through the deflector 700, avoiding the mud from forming eddies on the end face of the connecting wing 715 and impacting the inner wall of the short section, thereby ensuring the stability of the connection between the deflector 700 and the fixed segment 712.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A downhole detection while drilling system, characterized in that: include: A detection sub and a measurement while drilling instrument connected to the detection sub; The detection sub comprises a non-magnetic drill collar (100), a transmitting module and a receiving module; Wherein, the transmitting module is arranged in the side wall of the non-magnetic drill collar (100) and comprises a transmitting antenna (200); The receiving module is arranged in the side wall of the non-magnetic drill collar (100) and is electrically connected to the measurement while drilling instrument, and comprises a receiving antenna (300). The receiving antenna (300) and the transmitting antenna (200) are arranged separately along the axial direction of the non-magnetic drill collar (100).

2. The detection while drilling downhole system according to claim 1, characterized in that: The transmitting module further comprises a transmitting circuit board (400), wherein the transmitting circuit board (400) is electrically connected to the transmitting antenna (200); The receiving module further comprises a receiving circuit board (500), wherein the receiving circuit board (500) is electrically connected to the receiving antenna (300); The measurement while drilling instrument comprises an MWD docking circuit board (600), wherein the MWD docking circuit board (600) is arranged in the side wall of the non-magnetic drill collar (100) and is electrically connected to the receiving circuit board (500).

3. The downhole detection while drilling system according to claim 2, characterized in that: The detection sub also includes a flow guide (700) located in the non-magnetic drill collar (100), and the flow guide (700) includes a flow guide body (710) and a ten-hole connector (720); The guide body (710) is provided with a wire hole (711) penetrating the guide body, and is connected to the non-magnetic drill collar (100) via a fixing nail (800); The fixing nail (800) is provided with an inner hole penetrating therethrough, and the inner hole is in communication with the wire hole (711); The ten-hole connector (720) is connected to the end of the flow guide body (710), and is electrically connected to the MWD docking circuit board (600) via electric wires passing through the wire holes (711).

4. The downhole detection while drilling system according to claim 3, characterized in that: The flow guide body (710) comprises a fixed section (712) and a wire section (713); The fixing section (712) is in the shape of a ring and is connected to the non-magnetic drill collar (100); The wire segment (713) is rod-shaped, penetrates the fixed segment (712), and forms a flow passage (714) with the fixed segment (712); the outer side surface of the wire segment (713) is connected to the inner wall of the fixed segment (712) via a connecting wing (715).

5. The downhole detection while drilling system according to claim 4, characterized in that: The end of the wire segment (713) away from the ten-hole connector (720) is in a cone shape; The connecting wing (715) extends axially along the fixed section (712), and its length is shorter than the length of the fixed section (712). Both ends of the connecting wing (715) are triangular wedge-shaped, and the connecting lines of the two inclined surfaces of each end are connected between the fixed section (712) and the wire section (713), and the connection between the two inclined surfaces adopts arc transition.

6. The downhole detection while drilling system according to claim 2, characterized in that: Three circuit board bins (900) are provided on the side wall of the non-magnetic drill collar (100), the three circuit board bins (900) are spaced apart around the axis of the non-magnetic drill collar (100), and adjacent circuit board bins (900) are connected via through holes penetrating the bin wall; The three circuit board bins (900) are respectively provided with closed bin covers (1000), the closed bin covers (1000) are arranged to cover the openings of the circuit board bins (900) and are connected to the non-magnetic drill collars (100); The MWD docking circuit board (600), the transmitting circuit board (400) and the receiving circuit board (500) are respectively arranged in three circuit board compartments (900).

7. The downhole detection while drilling system according to claim 1, characterized in that: Two antenna chambers (1100) are provided on the side wall of the non-magnetic drill collar (100), and the two antenna chambers (1100) are spaced apart and distributed along the axis of the non-magnetic drill collar (100); The two antenna chambers (1100) are respectively provided with insulating chamber covers (1200), the insulating chamber covers (1200) are arranged to cover the openings of the antenna chambers (1100) and are connected to the non-magnetic drill collars (100); The transmitting antenna (200) and the receiving antenna (300) are separately arranged in the two antenna compartments (1100).

8. The downhole detection while drilling system according to claim 7, characterized in that: A shielding chamber (1300) is also provided on the side wall of the non-magnetic drill collar (100); the shielding chamber (1300) is C-shaped, opposite to the antenna chamber (1100), and extends from the middle of one of the antenna chambers (1100) to the middle of the other antenna chamber (1100) in the axial direction of the non-magnetic drill collar (100); The shielding chamber (1300) corresponds to a shielding cover plate (1400), the shielding cover plate (1400) is arranged to cover the opening of the shielding chamber (1300) and is connected to the non-magnetic drill collar (100); The detection short section further comprises a C-shaped shielding member (1500), and the C-shaped shielding member (1500) is arranged in the shielding compartment (1300).

9. The downhole detection while drilling system according to claim 7, characterized in that: A shielding chamber (1300) is also provided on the side wall of the non-magnetic drill collar (100), the shielding chamber (1300) is C-shaped, and two shielding chambers (1300) are provided, and the two shielding chambers (1300) are respectively opposite to the two antenna chambers (1100) and are respectively located in the middle of the two antenna chambers (1100); The two shielding chambers (1300) are respectively provided with shielding cover plates (1400), the shielding cover plates (1400) are arranged to cover the openings of the shielding chambers (1300) and are connected to the non-magnetic drill collars (100); The detection short section further comprises two C-shaped shielding components (1500), and the two C-shaped shielding components (1500) are respectively arranged in the two shielding chambers (1300).

10. The downhole detection while drilling system according to claim 1, characterized in that: At least one wear-resistant belt (1600) is provided on the outer wall of the non-magnetic drill collar (100), and the wear-resistant belt (1600) extends along the circumference of the non-magnetic drill collar (100).

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