A transient electromagnetic instrument probe

Abstract

The present invention relates to the technical field of marine engineering equipment, and in particular to a transient electromagnetic instrument probe, comprising a cable and a reel, wherein the reel is used for winding the cable and unwinding the free end of the cable into a prefabricated well on the seabed; the present invention also comprises an airbag, a transmitting coil, a receiving coil and a bidirectional pump, wherein two bidirectional pumps are fixedly arranged on the airbag, wherein one of the bidirectional pumps is used for injecting water into the airbag to expand the airbag, wherein the expanded airbag is used for blocking the wellhead of the prefabricated well, and the other bidirectional pump is used for pumping seawater in the prefabricated well out of the well; the present invention arranges a bidirectional pump to inject water into the airbag to expand the airbag, wherein the expanded airbag is used for blocking the wellhead of the prefabricated well, and the other bidirectional pump pumps seawater in the prefabricated well out of the well, so that a closed waterless space is formed in the well, thereby creating a detection environment with almost no seawater interference, which is conducive to improving the accuracy of receiving signals by the receiving coil.

Description

Technical Field

[0001] The invention relates to the technical field of marine engineering equipment, and in particular to a transient electromagnetic instrument probe. Background Art

[0002] Transient electromagnetic instruments are an important component of marine engineering equipment. In marine environment applications, especially in geological exploration in shallow offshore areas, transient electromagnetic instruments need to be combined with a series of marine engineering technologies and equipment, such as professional marine survey ships, remote-controlled submersibles, seabed drilling equipment and other underwater operating platforms, in order to effectively detect the seabed.

[0003] During the exploration process, the resistivity of the formation is very important. Measuring the resistivity of the formation is the basis for evaluating the physical parameters of the formation. During the measurement, a deep well or deep hole is drilled in the formation, and a transmitting coil and a receiving coil array are placed. When measuring the resistivity of the formation, the transmitting coil implements a high-power single-periodic pulse sequence to ensure that the useful signal of the eddy current field induced by the formation can be effectively measured and received. By observing the electromagnetic response of these eddy current fields that changes with time, the resistivity distribution of the underground medium can be inferred, thereby revealing geological structure information. In this process, transient electromagnetic detection in the marine environment will be interfered by seawater, because the high conductivity of seawater not only causes the electromagnetic signal to decay rapidly, but also causes complex eddy current effects, which seriously interferes with the clear identification of underground target signals and reduces the reliability and resolution of the detection data.

[0004] The invention with publication number CN103603650B discloses a transient electromagnetic logging instrument, comprising a housing, a circuit module disposed in the housing, and an electromagnetic probe system connected to the circuit module. The electromagnetic probe system consists of a transmitting coil with a magnetic core and a plurality of receiving coils.

[0005] As in the above technical solution, when the existing transient electromagnetic instrument is used in a marine environment, the electromagnetic probe placed in a deep well or deep hole is in the seawater and is greatly disturbed by the seawater during operation, which affects the accuracy of the receiving coil receiving the signal. Summary of the invention

[0006] In view of this, the present invention proposes a transient electromagnetic instrument probe, which is provided with a two-way pump to inject water into the airbag to expand the airbag, and the expanded airbag is used to block the wellhead of the prefabricated well. Another two-way pump pumps the seawater in the prefabricated well to the outside of the well, so that a closed waterless space is formed in the well, thereby creating a detection environment with almost no seawater interference, which is conducive to improving the detection accuracy and solves the problem that when the existing transient electromagnetic instrument is used in the marine environment, the electromagnetic probe placed in the deep well or deep hole is in the seawater, and is greatly interfered by the seawater during operation, which affects the accuracy of the receiving coil receiving the signal.

[0007] The technical solution of the present invention is achieved in this way:

[0008] The present invention provides a transient electromagnetic instrument probe, comprising a cable and a reel, wherein:

[0009] The reel is used to wind the cable and unwind the free end of the cable into a prefabricated well on the seabed;

[0010] It also includes an airbag, a transmitting coil, a receiving coil and a bidirectional pump, wherein:

[0011] A ventilation channel is provided inside the cable, an air outlet is provided on one side of the free end of the cable, an air inlet is provided on the side of one end of the cable close to the winding drum, the air outlet and the air inlet are connected through the ventilation channel, and the free end of the cable passes through the center position of the airbag and is fixedly connected;

[0012] The transmitting coil and the receiving coil are detachably arranged on the free end of the cable and are electrically connected to the cable;

[0013] Two bidirectional pumps are fixedly arranged on the airbag, one of which is used to inject water into the airbag to expand the airbag, and the expanded airbag is used to block the wellhead of the prefabricated well, and the other bidirectional pump is used to pump seawater in the prefabricated well out of the well.

[0014] On the basis of the above technical solution, preferably, the cable comprises a sheath and wires, wherein:

[0015] A plurality of wires are arranged on the inner side of the outer skin, one of which is electrically connected to the transmitting coil, another is electrically connected to the receiving coil, and the remaining wires are electrically connected to the bidirectional pump;

[0016] The ventilation channel is formed between the outer skin and the electric wire, and the air outlet and the air inlet are arranged through the outer skin.

[0017] On the basis of the above technical solution, preferably, the airbag includes a base and an airbag ring, wherein:

[0018] The base is fixedly arranged on the inner side of the airbag ring, and a through hole is arranged on the base, and the outer skin passes through the through hole and is fixedly connected;

[0019] The two-way pump is fixedly arranged on one end of the base away from the winding disk, wherein the water outlet of one of the two-way pumps is connected to the interior of the airbag ring, and the water outlet of the other two-way pump passes through the base toward the winding disk.

[0020] On the basis of the above technical solution, preferably, a ring-shaped fixing groove is provided inside the ring of the airbag ring, and the side of the base is embedded in the fixing groove, wherein:

[0021] The side portion of the base is in contact with the bottom of the fixing groove.

[0022] On the basis of the above technical solution, preferably, the cross section of the fixing groove and the cross section of the side portion of the base are both trapezoidal.

[0023] On the basis of the above technical solution, preferably, the airbag further includes a water suction hose and a weighted ball, wherein:

[0024] The water suction hose is fixed to each of the water suction ports of the two bidirectional pumps;

[0025] The weighted ball is fixed on one end of each of the water suction hoses away from the two-way pump.

[0026] On the basis of the above technical solution, preferably, it also includes a clamp ball, wherein,

[0027] The clamp ball is fixedly arranged on an end of the outer skin away from the base;

[0028] The distance between the clamp ball and the base is smaller than the length of the water suction hose.

[0029] On the basis of the above technical solution, preferably, it also includes a clamp, wherein:

[0030] The clamp is provided with two;

[0031] One end of one of the clamps is fixedly connected to the side of the transmitting coil, and the other end is clamped and fixed on the outer skin. One end of the other clamp is fixedly connected to the side of the receiving coil, and the other end is clamped and fixed on the outer skin.

[0032] On the basis of the above technical solution, preferably, the clamp comprises two clamping plates and a soft rope, wherein:

[0033] The two clamping plates are fixed on the outer skin by bolts;

[0034] A plurality of the soft ropes are fixed to the side of each of the clamping plates;

[0035] The transmitting coil is fixedly connected to the soft rope on the corresponding clamp;

[0036] The receiving coil is fixedly connected to the soft rope on the corresponding clamp.

[0037] On the basis of the above technical solution, preferably, a positioning ring groove is provided on the side of the outer skin corresponding to the position of the clamping plate, wherein:

[0038] The two clamping plates are clamped and fixed on the inner side of the positioning ring groove.

[0039] The transient electromagnetic instrument probe of the present invention has the following beneficial effects compared with the prior art:

[0040] (1) A two-way pump is set up to inject water into the airbag to expand the airbag. The expanded airbag is used to block the wellhead of the prefabricated well. Another two-way pump is used to pump the seawater in the prefabricated well out of the well, so that a closed waterless space is formed in the well, thereby creating a detection environment with almost no seawater interference, which is conducive to improving the detection accuracy. The size of the wellhead can be adaptively adjusted through the expansion of the airbag.

[0041] (2) By setting the distance between the clamp ball and the base to be smaller than the length of the water suction hose and by setting a counterweight ball, the water suction hose can be close to the bottom of the well, which facilitates the emptying of seawater in the well.

[0042] (3) By setting up a soft rope, the transmitting coil and the receiving coil can maintain a horizontal state through the action of gravity, which is beneficial to improving the detection accuracy.

[0043] (4) A ring-shaped fixing groove is provided on the inner side of the airbag ring, and the side of the base is embedded in the fixing groove, which facilitates the removal of the airbag ring and facilitates its later replacement. At the same time, by setting the cross-section of the fixing groove and the cross-section of the side of the base to be trapezoidal, the airbag ring is not easy to fall off the base during the use of the airbag, thereby improving the stability of the wellhead plugging.

[0044] (5) A reel is provided to reel in the cable for easy carrying and circulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0046] Figure 1 A diagram showing the use status of a transient electromagnetic instrument probe of the present invention;

[0047] Figure 2 is a cross-sectional view of a cable of the present invention;

[0048] Figure 3 is a longitudinal cross-sectional view of the cable of the present invention;

[0049] Figure 4 A partial bottom view of the airbag of the present invention;

[0050] Figure 5 For the present invention Figure 4 AA section view;

[0051] Figure 6 For the present invention Figure 4 Schematic diagram of the local structure;

[0052] Figure 7 A front view of a receiving coil of the present invention;

[0053] Figure 8 A top view of the fixture of the present invention;

[0054] Fig. 9 It is a system block diagram of the existing transient electromagnetic instrument;

[0055] In the figure: 1. cable; 2. reel; 3. air bag; 4. transmitting coil; 5. receiving coil; 6. bidirectional pump; 7. clamp ball; 8. clamp; 9. prefabricated well; 11. outer skin; 12. wire; 31. base; 32. air bag ring; 33. water suction hose; 34. weighted ball; 81. splint; 82. soft rope; 101. ventilation channel; 102. air outlet; 103. air inlet; 104. positioning ring groove; 301. through hole; 302. fixing groove. DETAILED DESCRIPTION

[0056] The following will be combined with the specific implementation of the present invention to clearly and completely describe the technical solution in the present invention. Obviously, the described implementation is only a part of the implementation of the present invention, not all of the implementation. Based on the implementation of the present invention, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0057] like Figure 1-9 As shown, a transient electromagnetic instrument probe of the present invention includes a cable 1 and a reel 2, and also includes an air bag 3, a transmitting coil 4, a receiving coil 5 and a bidirectional pump 6.

[0058] The probe is a component of a transient electromagnetic instrument, which is any one of the prior art, such as a transient electromagnetic shallow layer full-wave exploration high-resolution instrument disclosed in CN112012725A, such as Fig. 9 As shown, in the probe, its transmitting coil 4 is connected to the transmitting circuit of the transient electromagnetic instrument through the cable 1, and the receiving coil 5 is connected to the acquisition circuit of the transient electromagnetic instrument through the cable 1. The acquisition circuit and the transmitting circuit are electrically connected to the control circuit. The specific circuit structure and principle can be known in the prior art.

[0059] The reel 2 is used to wind the cable 1 and to unwind the free end of the cable 1 into a prefabricated well 9 on the seabed, thereby allowing the airbag 3, the transmitting coil 4, the receiving coil 5 and the bidirectional pump 6 to enter the well, wherein the reel 2 adopts any electric winch structure in the prior art, such as the electric winch disclosed in CN206172856U, and the cable 1 is wound and unwound through the reel 2. The free end of the cable 1 refers to the end of the cable 1 that is not wound on the reel 2, and this end is used to install the airbag 3, the transmitting coil 4, and the receiving coil 5, wherein the transmitting coil 4 and the receiving coil 5 are detachably arranged on the free end of the cable 1; the free end of the cable 1 passes through the center position of the airbag 3 and is fixedly connected.

[0060] Two two-way pumps 6 are fixedly arranged on the airbag 3, one of which is used to inject water into the airbag 3 to expand the airbag 3. The expanded airbag 3 is used to block the wellhead of the prefabricated well 9, and the other two-way pump 6 is used to pump the seawater in the prefabricated well 9 out of the well. Through the two-way pump 6, a closed waterless space is formed in the well, thereby creating a detection environment with almost no seawater interference, which is conducive to improving the accuracy of the receiving coil 5 receiving the signal.

[0061] In order to facilitate the two-way pump 6 to smoothly pump seawater in the well, a ventilation channel 101 is provided inside the cable 1, an air outlet 102 is provided on one side of the free end of the cable 1, and an air inlet 103 is provided on the side of the end of the cable 1 close to the winding drum 2. The air outlet 102 and the air inlet 103 are connected through the ventilation channel 101, and the air inlet 103 is connected to the outside atmosphere. During the pumping process, the outside atmosphere enters the ventilation channel 101 from the air inlet 103, and then enters the well from the air outlet 102;

[0062] Since the ventilation channel 101 needs to be provided, the cable 1 includes a sheath 11 and a wire 12, wherein Figure 3 As shown, the inner diameter of the outer skin 11 is larger than the outer diameter of the wire 12. The outer skin 11 is made of salt corrosion resistant material to adapt to long-term use in the marine environment. A plurality of wires 12 are arranged on the inner side of the outer skin 11. The plurality of wires 12 are independently insulated and arranged in parallel on the inner side of the outer skin 11. One of the wires 12 is electrically connected to the transmitting coil 4, another wire 12 is electrically connected to the receiving coil 5, and the remaining wires 12 are electrically connected to the bidirectional pump 6. A ventilation channel 101 is formed between the outer skin 11 and the wires 12, and an air outlet 102 and an air inlet 103 are arranged through the outer skin 11.

[0063] The airbag 3 includes a base 31 and an airbag ring 32, wherein the base 31 is fixedly arranged on the inner side of the airbag ring 32, and a through hole 301 is arranged on the base 31, and the outer skin 11 passes through the through hole 301 and is fixedly connected; the two-way pump 6 is fixedly arranged on the end of the base 31 away from the winding disk 2, wherein the water outlet of one of the two-way pumps 6 is connected to the inside of the airbag ring 32, and the water outlet of the other two-way pump 6 passes through the base 31 in the direction of the winding disk 2, such as Figure 1 As shown, when the airbag 3 reaches the prefabricated well 9, one of the two-way pumps 6 sucks the seawater in the well and injects it into the airbag ring 32, so that the airbag ring 32 expands and presses against the well wall to achieve plugging and sealing, and then another two-way pump 6 sucks the seawater in the well and discharges the pumped seawater into the seawater outside the well. After detection, the two-way pump 6 connected to the airbag ring 32 sucks the seawater in the airbag ring 32 and discharges the pumped seawater into the well, so that the airbag ring 32 is emptied and deflated. At this time, the reel 2 reels the cable 1 to make the airbag 3 leave the prefabricated well 9. The two-way pump 6 is a device that can realize two-way liquid transportation. Its working principle is realized by mechanical structures such as reciprocating pistons or gears. Specifically, during the working process of the pump, the piston or gear will continuously move forward and backward, sucking liquid through the inlet of the pump, and then discharging the liquid through the outlet of the pump. When the piston or gear moves backward, a vacuum is formed in the cavity of the pump, so that the liquid is sucked in; and when the piston or gear moves forward, the liquid is pushed and discharged. The inlet and outlet channels of the pump are separated, thus achieving two-way delivery of the liquid. When the piston or gear moves backward, the inlet channel opens and the liquid is sucked into the pump; when the piston or gear moves forward, the inlet channel closes, the outlet channel opens, and the liquid is pushed out of the pump.

[0064] In order to absorb water from the bottom of the well, the air bag 3 also includes a water suction hose 33 and a weighted ball 34, wherein Figure 1 and Figure 5 As shown, a suction hose 33 is fixed on each suction port of the two bidirectional pumps 6; a counterweight ball 34 is fixed on each end of the suction hose 33 away from the bidirectional pump 6. Through this structure, the lower end of the suction hose 33 can penetrate into the bottom of the well, making it convenient to drain the seawater in the well.

[0065] Since seawater is corrosive, a replacement structure of the airbag ring 32 is designed. Specifically, a ring-shaped fixing groove 302 is provided on the inner side of the airbag ring 32, and the side of the base 31 is embedded in the fixing groove 302, wherein the side of the base 31 is abutted against the bottom of the fixing groove 302. The airbag ring 32 itself is elastic. When it is installed with the base 31, the side of the base 31 is abutted against the bottom of the fixing groove 302 by the elastic force.

[0066] In order to prevent the airbag ring 32 from falling off in the working state, the cross section of the fixing groove 302 and the cross section of the side of the base 31 are both trapezoidal. Figure 5and Figure 6 As shown, the airbag ring 32 is restricted by a trapezoidal structure. In the working state, the airbag ring 32 is not easy to fall off from the base 31. When the airbag ring 32 needs to be replaced, the airbag ring 32 is pulled to stretch it so that it can fall off from the base 31.

[0067] In order to prevent the transmitting coil 4 and the receiving coil 5 from shaking in the working state, a clamp ball 7 is fixedly arranged on the end of the outer skin 11 away from the base 31, that is, Figure 1 A clamp ball 7 is provided at the lower end of the cable 1 shown, so that the cable 1 is straightened by gravity, thereby effectively reducing shaking.

[0068] In addition, the distance between the clamp ball 7 and the base 31 is smaller than the length of the water suction hose 33 , so that after the water suction hose 33 sucks out the seawater in the well, there will be no seawater around the transmitting coil 4 and the receiving coil 5 .

[0069] In the above structure, the transmitting coil 4 and the receiving coil 5 adopt a detachable modular design. Specifically, Figure 7-8 As shown, the transient electromagnetic instrument probe further includes a clamp 8, through which the transmitting coil 4 and the receiving coil 5 can be disassembled and installed.

[0070] Among them, two clamps 8 are provided, one end of one clamp 8 is fixedly connected to the side of the transmitting coil 4, and the other end is clamped and fixed on the outer skin 11, and one end of the other clamp 8 is fixedly connected to the side of the receiving coil 5, and the other end is clamped and fixed on the outer skin 11. This structure can facilitate the disassembly of the transmitting coil 4 and the receiving coil 5, and facilitate replacement.

[0071] The clamp 8 includes two clamping plates 81 and a soft rope 82, wherein Figure 8 As shown, two clamps 81 are fixed on the outer skin 11 by bolt clamping; a number of soft ropes 82 are fixed to the sides of each clamp 81; the transmitting coil 4 is fixedly connected to the soft rope 82 on the corresponding clamp 8; the receiving coil 5 is fixedly connected to the soft rope 82 on the corresponding clamp 8, and through the action of gravity, the transmitting coil 4 and the receiving coil 5 are suspended under the corresponding clamp 8, which is beneficial to keep the transmitting coil 4 and the receiving coil 5 level and improve the detection accuracy.

[0072] In addition, to prevent the clamp 8 from slipping, a positioning ring groove 104 is provided on the side of the outer skin 11 and at the position corresponding to the clamp plate 81, wherein the two clamp plates 81 are clamped and fixed on the inner side of the positioning ring groove 104. Before clamping, the positioning ring groove 104 can be used to quickly position and install the clamp 8. After clamping, the positioning ring groove 104 is used to limit the clamp 8 to prevent the clamp 8 from slipping. At the same time, a number of positioning ring grooves 104 are equidistantly arranged along the axial direction of the outer skin 11, so as to facilitate adjusting the positioning of the transmitting coil 4 and the receiving coil 5 through a number of positioning ring grooves 104.

[0073] The method for using a transient electromagnetic instrument probe of the present invention is as follows:

[0074] First, a drilling machine is used to drill a prefabricated well 9 at an exploration location in a shallow water area. After drilling, the cable 1 is unwound through the reel 2, so that the airbag 3, the transmitting coil 4, and the receiving coil 5 enter the well. After they are in place, the seawater in the well is sucked out by one of the two-way pumps 6 and injected into the airbag ring 32, so that the airbag ring 32 expands and presses against the well wall to achieve plugging and sealing. After sealing, the seawater in the well is sucked out by another two-way pump 6, and the pumped seawater is discharged into the seawater outside the well. When a waterless environment is formed in the well, detection is carried out.

[0075] After detection, the seawater in the airbag ring 32 is sucked out by a two-way pump 6 connected to the airbag ring 32 to empty and deflate the airbag ring 32. Then, the cable 1 is reeled up by the reel 2 to make the airbag 3, the transmitting coil 4, and the receiving coil 5 leave the prefabricated well 9.

[0076] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A transient electromagnetic instrument probe, comprising a cable (1) and a reel (2), wherein: The reel (2) is used to wind the cable (1) and to unwind the free end of the cable (1) into a prefabricated well (9) on the seabed; It is characterized by comprising an air bag (3), a transmitting coil (4), a receiving coil (5) and a bidirectional pump (6), wherein: A ventilation channel (101) is provided inside the cable (1), an air outlet (102) is provided on one side of the free end of the cable (1), an air inlet (103) is provided on the side of one end of the cable (1) close to the winding drum (2), the air outlet (102) and the air inlet (103) are connected through the ventilation channel (101), and the free end of the cable (1) passes through the center position of the air bag (3) and is fixedly connected; The transmitting coil (4) and the receiving coil (5) are detachably arranged on the free end of the cable (1) and are electrically connected to the cable (1); Two bidirectional pumps (6) are fixedly arranged on the airbag (3), one of the bidirectional pumps (6) is used to inject water into the airbag (3) to expand the airbag (3), and the expanded airbag (3) is used to block the wellhead of the prefabricated well (9), and the other bidirectional pump (6) is used to pump seawater in the prefabricated well (9) out of the well.

2. A transient electromagnetic instrument probe as claimed in claim 1, characterized in that: The cable (1) comprises a sheath (11) and wires (12), wherein: A plurality of wires (12) are arranged on the inner side of the outer skin (11), one of the wires (12) is electrically connected to the transmitting coil (4), another of the wires (12) is electrically connected to the receiving coil (5), and the remaining wires (12) are electrically connected to the bidirectional pump (6); The ventilation channel (101) is formed between the outer skin (11) and the electric wire (12), and the air outlet hole (102) and the air inlet hole (103) are arranged through the outer skin (11).

3. A transient electromagnetic instrument probe as claimed in claim 2, characterized in that: The airbag (3) comprises a base (31) and an airbag ring (32), wherein: The base (31) is fixedly arranged on the inner side of the airbag ring (32); a through hole (301) is arranged on the base (31); the outer skin (11) passes through the through hole (301) and is fixedly connected; The bidirectional pump (6) is fixedly arranged on one end of the base (31) away from the winding drum (2), wherein a water outlet of one of the bidirectional pumps (6) is connected to the interior of the airbag ring (32), and a water outlet of the other bidirectional pump (6) penetrates the base (31) in the direction of the winding drum (2).

4. A transient electromagnetic instrument probe as claimed in claim 3, characterized in that: The inner side of the airbag ring (32) is provided with a ring-shaped fixing groove (302), and the side of the base (31) is embedded in the fixing groove (302), wherein: The side portion of the base (31) abuts against the bottom of the fixing groove (302).

5. A transient electromagnetic instrument probe as claimed in claim 4, characterized in that: The cross section of the fixing groove (302) and the cross section of the side of the base (31) are both trapezoidal.

6. A transient electromagnetic instrument probe as claimed in claim 3, characterized in that: The air bag (3) further comprises a water suction hose (33) and a weighted ball (34), wherein: The water suction hose (33) is fixed at each of the water suction ports of the two bidirectional pumps (6); One of the weighted balls (34) is fixed on one end of each of the water suction hoses (33) away from the bidirectional pump (6).

7. A transient electromagnetic instrument probe as claimed in claim 6, characterized in that: Also included is a clamp ball (7), wherein: The clamp ball (7) is fixedly arranged on an end of the outer skin (11) away from the base (31); The distance between the clamp ball (7) and the base (31) is smaller than the length of the water suction hose (33).

8. A transient electromagnetic instrument probe as claimed in claim 2, characterized in that: Also included is a clamp (8), wherein: The clamps (8) are provided with two; One end of one of the clamps (8) is fixedly connected to the side of the transmitting coil (4), and the other end is clamped and fixed on the outer skin (11); one end of the other clamp (8) is fixedly connected to the side of the receiving coil (5), and the other end is clamped and fixed on the outer skin (11).

9. A transient electromagnetic instrument probe as claimed in claim 8, characterized in that: The clamp (8) comprises two clamping plates (81) and a soft rope (82), wherein: The two clamping plates (81) are clamped and fixed on the outer skin (11) by bolts; A plurality of soft ropes (82) are fixed to the side of each clamping plate (81); The transmitting coil (4) is fixedly connected to the soft rope (82) on the corresponding clamp (8); The receiving coil (5) is fixedly connected to the soft rope (82) on the corresponding clamp (8).

10. A transient electromagnetic instrument probe as claimed in claim 9, characterized in that: A positioning ring groove (104) is provided on the side of the outer skin (11) at a position corresponding to the clamping plate (81), wherein the two clamping plates (81) are clamped and fixed on the inner side of the positioning ring groove (104).

Images