Electric spark source transmitting probe for horizontal drill

Abstract

The utility model relates to an electric spark source transmitting probe for a horizontal drill. The electric spark source transmitting probe comprises a first electrode, a second electrode, a first insulating part, a conductive part and a locking part, the first electrode is of a structure with a cavity, one end of the second electrode extends into the cavity of the first electrode, and the other end of the second electrode is exposed out of the first electrode and sleeved with the first insulating part and the conductive part. The second electrode, the first insulating part and the conductive part are locked to one end outside the first electrode through the locking part; the first electrode, the second electrode, the first insulating part and the conductive part are coaxially arranged. The beneficial effects are that only the conductive member needs to be replaced after sound knock, the replacement is convenient, the cost is reduced, and frequent replacement of the second electrode and other structures is avoided; in addition, directional discharge can be achieved, the orientation of a hidden karst cave or a crack zone can be recognized, and sound wave energy is concentrated to point to a target stratum.

Description

Technical Field

[0001] This utility model relates to the field of horizontal drilling technology, specifically to an electric spark source transmitting probe for horizontal drilling. Background Technology

[0002] Before tunnel excavation, a exploratory borehole several kilometers long needs to be drilled using horizontal drilling to send sonic logging instruments into the borehole to investigate the surrounding rock conditions. Then, the probe is pushed into the horizontal well through the horizontal drill to perform sonic detonation. However, during operation, the charged electrode of the probe often cannot remain in the centered position, causing the charged electrode in the probe to burst due to the swinging motion during sonic detonation. This results in water leakage and high replacement costs.

[0003] In addition, during operation, the probe cannot select a suitable sonic blast point according to the site conditions, and is easily affected by obstacles, strata, etc., which weakens the sonic blast effect. Utility Model Content

[0004] This invention addresses the technical problems existing in the prior art by providing an electric spark source transmitting probe for horizontal drilling. It can perform directional sonic detonation operation according to the sonic detonation requirements, enhance the effective signal strength, reduce energy scattering, suppress interference, and improve the signal-to-noise ratio of the target formation.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: an electric spark source emitting probe for horizontal drilling, comprising a first electrode, a second electrode, a first insulating component, a conductive component, and a locking component;

[0006] The first electrode has a cavity structure, one end of the second electrode extends into the cavity of the first electrode, and the other end of the second electrode is exposed outside the first electrode and is fitted with the first insulating member and the conductive member. The second electrode, the first insulating member, and the conductive member are locked to one end outside the first electrode by the locking member.

[0007] The first electrode, the second electrode, the first insulating element, and the conductive element are coaxially arranged.

[0008] As a further technical solution, a protrusion is provided along the circumferential direction of the conductive element, and an electric arc is generated by discharging to the first electrode in the medium through the protrusion.

[0009] As a further technical solution, the end of the second electrode facing away from the conductive element is connected to one end of the power transmission element, and the other end of the power transmission element extends out of the first electrode.

[0010] As a further technical solution, the outer diameter of the conductive element is smaller than the outer diameter of the first electrode.

[0011] As a further technical solution, the cross-section of the first insulating member along the length of the first electrode is T-shaped, the vertical side of the T-shape is adapted to be inserted into the corresponding end of the first electrode, and the horizontal side of the T-shape abuts against the conductive member.

[0012] The outer diameter of the horizontal side of the T-shape is greater than the outer diameter of the vertical side of the T-shape and the outer diameter of the conductive component.

[0013] As a further technical solution, it also includes a second insulating member disposed in the cavity of the first electrode, the second insulating member being sleeved outside the second electrode and sharing the same central axis as the second electrode.

[0014] As a further technical solution, the power transmission component is covered with a waterproof sleeve, with one end of the waterproof sleeve extending into the first electrode and the other end of the waterproof sleeve located outside the first electrode.

[0015] As a further technical solution, there are gaps between the outer wall of the power transmission component and the outer wall of the second electrode and the inner wall of the first electrode.

[0016] As a further technical solution, at least one mounting hole is provided along the circumferential direction of the conductive element, and the protrusion is adapted to be connected to the mounting hole.

[0017] As a further technical solution, the locking component is provided with a waterproof layer.

[0018] The beneficial effects of this utility model are:

[0019] 1. The design of the conductive and locking components, as well as the first and second electrodes, allows only the conductive components to be replaced after sonic detonation, making replacement convenient, reducing costs, and avoiding frequent replacement of the second electrode and other structures.

[0020] 2. The structural design of the protrusions on the conductive components allows for control of the discharge direction, enabling directional discharge and identification of the location of hidden caves or fracture zones. This concentrates acoustic energy towards the target formation, such as specific rock layers above or below the wellbore, enhancing the effective signal strength, reducing energy scattering, and suppressing interference. In other words, it avoids reflection interference from obstacles such as mud and casing within the wellbore, improving the signal-to-noise ratio of the target formation. It adapts to anisotropic formations, while also improving operational efficiency and safety.

[0021] 3. The design of the first and second insulating components prevents short circuits and improves the stability of the drill bit;

[0022] 4. The locking mechanism is designed to lock and fix the first insulating component, conductive component, second electrode, and first electrode together, while also facilitating replacement and operation.

[0023] 5. The structural design of the external mounting holes for conductive components allows for selection of the number of discharge directions based on actual conditions, improving the efficiency of sonic detonation, making it highly practical and easy to operate. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of an electric spark source transmitting probe for horizontal drilling according to the present invention.

[0025] Figure 2 This is a schematic diagram of the structure of an electric spark source transmitting probe for horizontal drilling according to the present invention after removing the first electrode.

[0026] Figure 3 This is a schematic diagram of the structure of the electric spark source transmitting probe for horizontal drilling according to the present invention, cut horizontally.

[0027] Figure 4 This is a three-dimensional structural diagram of the first insulating component;

[0028] Figure 5 This is a schematic diagram of the structure in Example 2, in which several mounting holes are provided along the circumference of the conductive component.

[0029] The attached diagram lists the components represented by each number as follows:

[0030] First electrode 1, second electrode 2;

[0031] First insulating component 3, groove 31, through groove 32;

[0032] Conductive component 4, protrusion 41, mounting hole 42;

[0033] Locking component 5, second insulating component 6;

[0034] Power transmission component 7, waterproof sleeve 71, stop ring 71a. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0037] In the description of this application, the term "for example" is used to mean "used as an example, illustration, or description." Any embodiment described as "for example" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to implement and use the present invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the present invention can be implemented without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the present invention with unnecessary detail. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0038] Example 1

[0039] To reduce replacement frequency, lower costs, and improve work efficiency, this embodiment provides an electric spark source emitting probe for horizontal drilling. (See attached image.) Figures 1-3 It includes a first electrode 1, a second electrode 2, a first insulating component 3, a conductive component 4, and a locking component 5;

[0040] The first electrode 1 has a cavity structure. One end of the second electrode 2 extends into the cavity of the first electrode 1, and the other end of the second electrode 2 is exposed outside the first electrode 1 and is fitted with the first insulating member 3 and the conductive member 4. The second electrode 2, the first insulating member 3, and the conductive member 4 are locked to one end outside the first electrode 1 by the locking member 5.

[0041] The first electrode 1, the second electrode 2, the first insulating component 3, and the conductive component 4 are coaxially arranged;

[0042] It should be noted that the first electrode 1 is a cylindrical cavity structure, and the second electrode 2 is a rod-shaped structure with external threads. Correspondingly, the locking member 5 can be a nut to be threadedly connected to the second electrode 2. Since the drill bit of this utility model works in water, in order to improve the service life of the locking member 5, the locking member 5 is provided with a waterproof layer (not labeled in the figure).

[0043] For example, the first electrode 1 is made of stainless steel and is the cathode, while the second electrode 2 can be a positive electrode rod and is the anode.

[0044] In the specific implementation process, a protrusion 41 is provided along the circumferential direction of the conductive element 4. The protrusion 41 discharges to the first electrode 1 in the medium (such as water) to generate an electric arc. Therefore, the discharge direction can be controlled as needed to achieve directional discharge, so as to avoid the waste of energy in the ineffective direction (such as the shaft axis), thereby extending the life of the vibration source and reducing power consumption, and improving the efficiency and safety of operation.

[0045] For example, the protrusion 41 and the conductive element 4 can be integrally formed, that is, this structure is preferred when only one direction needs to be oriented during a single sonic detonation process.

[0046] It should be noted that the protrusion 41 may extend beyond the outer edge of the first insulating member 3. For example, the protrusion 41 may be a protruding structure with the same thickness as the conductive member 4, such as a sheet or a block; the protrusion 41 may also be a structure with one end larger than the other, and the size of the end facing the discharge direction can be selected according to the actual situation.

[0047] This structural design ensures the comparability of data from different measuring points, reduces systematic errors introduced by directional differences, and improves the accuracy of fracture identification and reservoir evaluation.

[0048] Furthermore, the outer diameter of the conductive element 4 is smaller than the outer diameter of the first electrode 1, which avoids short circuits and ensures that the discharge direction is directionally conducted from the protrusion 41.

[0049] In the specific implementation process, see Figures 2-4 The first insulating member 3 has a T-shaped cross-section along the length of the first electrode 1. The vertical side of the T-shape is adapted to be inserted into the corresponding end of the first electrode 1 in the insertion hole (unlabeled). The horizontal side of the T-shape abuts against the conductive member 4. The outer diameter of the surface where the horizontal side of the T-shape is located is larger than the outer diameter of the surface where the vertical side of the T-shape is located and the outer diameter of the conductive member 4, so as to avoid short circuits caused by contact between the first electrode 1 and the second electrode 2, thereby improving the stability of the drill bit.

[0050] To adapt to temperature changes, the T-shaped part has a groove 31 on its horizontal side and a through groove 32 on its vertical side. The groove 31 and the through groove 32 are connected. For example, if there are four grooves 31 on the horizontal side and four through grooves 32 on the vertical side, the grooves 31 on the horizontal side of the T-shaped part are evenly distributed along the circumference. The through grooves 32 on the vertical side of the T-shaped part are arranged along its length, and one end of the through groove 32 pointing to the locking member 5 is connected to one end of the groove 31 on the horizontal side of the T-shaped part (this end is the end closer to the center). It should be noted that one groove 31 corresponds to one through groove 32.

[0051] While improving the stability of the drill bit, the second electrode 2 is made coaxial with the first electrode 1. It also includes a second insulating member 6 disposed in the cavity of the first electrode 1. The second insulating member 6 is sleeved outside the second electrode 2 and shares the same central axis with the second electrode 2. That is, the first insulating member 3, the second insulating member 6, the first electrode 1, the second electrode 2, and the conductive member 4 share the same central axis.

[0052] It should be noted that at this time, refer to Figure 3 , Figure 4 The second insulating member 6 is a cylindrical structure with a through hole (not labeled in the figure) in the middle, so that the second electrode 2 is inserted into the second insulating member 6 through the through hole, but the end of the second electrode 2 away from the locking member 5 is exposed outside the second insulating member 6 to connect with the power transmission member 7.

[0053] It should be noted that, see Figure 3 , Figure 4 The outer diameter of the end face of the second insulating member 6 is greater than the outer diameter of the end face of the first insulating member 3 that extends into the first electrode 1, and one end face of the second insulating member 6 is connected to one end face of the first insulating member 3 that extends into the first electrode 1.

[0054] For example, the power transmission component 7 is welded to the second electrode 2. In this case, the power transmission component 7 can be a high-voltage cable. When the high-voltage cable is energized, the current is transmitted to the second electrode 2, and then to the conductive component 4 and the protrusion 41 in sequence through the second electrode 2, so that the protrusion 41 discharges to the first electrode 1 and generates an electric arc in the water, which generates a sonic boom through the electrohydraulic effect.

[0055] In the specific implementation process, see Figure 3 , Figure 4 To prevent water from entering the first electrode 1, the power transmission component 7 is covered with a waterproof sleeve 71, with one end of the waterproof sleeve 71 extending into the first electrode 1 and the other end of the waterproof sleeve 71 located outside the first electrode 1.

[0056] It should be noted that the waterproof sleeve 71 is adapted to the perforation on the corresponding side of the first electrode 1, so that the connection section between the first electrode 1 and the power transmission component 7 is sealed, preventing water from entering the second electrode 2 during the operation of the drill bit.

[0057] The waterproof sleeve 71 may be a cylindrical cavity structure, and a stop ring 71a is provided along the circumference of the waterproof sleeve 71. The stop ring 71a is located outside the first electrode 1, and its end face near the upper first electrode 1 abuts against the first electrode 1.

[0058] For example, there are gaps between the outer wall of the power transmission component 7 and the outer wall of the second electrode 2 and the inner wall of the first electrode 1 to avoid short circuits.

[0059] The structure of this embodiment enables directional conductivity, i.e., see [link to previous document]. Figure 1 , Figure 2 After rotating the protrusion 41 according to the conductive direction, it can be locked and fixed by the locking member 5, which improves the detection accuracy and resolution and adapts to anisotropic strata. For example, in the case of heterogeneous structures, directional discharge can specifically detect the stratum characteristics (such as permeability and porosity) in a specific direction, avoiding data mixing caused by multi-directional scattering; optimize the sound wave path: adjust the direction according to the distribution of ground stress to ensure that the sound wave penetrates the target area along the optimal path and accurately obtains the stratum mechanical parameters (such as Young's modulus and Poisson's ratio).

[0060] In addition, it can improve operational efficiency and safety, avoid energy waste, extend the life of the seismic source and reduce power consumption, and avoid risk areas; it can achieve dynamic direction control, adapt to the complex trajectory of horizontal wells, and can combine with drilling measurement data to dynamically optimize the discharge direction and achieve adaptive detection.

[0061] This utility model is implemented as follows:

[0062] Adjust the protrusion 41 according to the direction of the sonic blast, so that the protrusion 41 is aligned with the direction of the sonic blast, and then lock it in place by the locking member 5.

[0063] The drill bit is installed inside the horizontal drill pipe, and then the drill bit is advanced into the horizontal well through the horizontal drill pipe to perform directional sonic detonation operation.

[0064] If any part is damaged, simply unscrew the locking part 5 and replace the damaged part. The operation is simple, quick, and low-cost.

[0065] In this embodiment, the protrusion 41 and the conductive element 4 can be integrally formed.

[0066] Example 2

[0067] For situations requiring simultaneous sonic booms in multiple directions, see [link to relevant documentation]. Figure 5 At least one mounting hole 42 is provided along the circumferential direction of the conductive element 4, and the protrusion 41 is adapted to be connected to the mounting hole 42. That is, one mounting hole 42 is adapted to be connected to one protrusion 41.

[0068] Furthermore, the mounting hole 42 can be an internally threaded hole, and the end of the protrusion 41 that is threaded to the mounting hole 42 is provided with an external thread (not shown in the figure), so that the end of the protrusion 41 with the external thread is threaded to the mounting hole 42.

[0069] Therefore, the number of protrusions 41 can be selected as needed. For example, if at least two of the directions above, below, left, and right of the well shaft need to be conductive, then the protrusions 41 can be installed on the conductive component 4 in the corresponding directions according to the requirements.

[0070] This structural design enables multi-directional blasting in a single operation, improving work efficiency and the practicality of the drill bit.

[0071] It should be noted that the descriptions of each embodiment in the above embodiments have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0072] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0073] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A spark source emitting probe for horizontal drilling, characterized in that, Includes a first electrode (1), a second electrode (2), a first insulating component (3), a conductive component (4), and a locking component (5); The first electrode (1) has a cavity structure. One end of the second electrode (2) extends into the cavity of the first electrode (1). The other end of the second electrode (2) is exposed outside the first electrode (1) and is fitted with the first insulating member (3) and the conductive member (4). The second electrode (2), the first insulating member (3), and the conductive member (4) are locked to the outer end of the first electrode by the locking member (5). The first electrode (1), the second electrode (2), the first insulating component (3), and the conductive component (4) are coaxially arranged.

2. The electric spark source emitting probe for horizontal drilling according to claim 1, characterized in that, A protrusion (41) is provided along the circumferential direction of the conductive element (4), and an electric arc is generated by discharging to the first electrode (1) in the medium through the protrusion (41).

3. The electric spark source emitting probe for horizontal drilling according to claim 1, characterized in that, The end of the second electrode (2) away from the conductive element (4) is connected to one end of the power transmission element (7), and the other end of the power transmission element (7) extends out of the first electrode (1).

4. The electric spark source emitting probe for horizontal drilling according to claim 2, characterized in that, The outer diameter of the conductive element (4) is smaller than the outer diameter of the first electrode (1).

5. The electric spark source emitting probe for horizontal drilling according to claim 1, characterized in that, The first insulating member (3) has a T-shaped cross-section along the length of the first electrode (1). The vertical side of the T-shape is adapted to be inserted into the corresponding end of the first electrode (1), and the horizontal side of the T-shape abuts against the conductive member (4). The outer diameter of the horizontal side of the T-shape is greater than the outer diameter of the vertical side of the T-shape and the outer diameter of the conductive element (4).

6. The electric spark source emitting probe for horizontal drilling according to claim 2, characterized in that, It also includes a second insulating member (6) disposed in the cavity of the first electrode (1), the second insulating member (6) being sleeved outside the second electrode (2) and sharing the same central axis with the second electrode (2).

7. The electric spark source emitting probe for horizontal drilling according to claim 3, characterized in that, The power transmission component (7) is covered with a waterproof sleeve (71), and one end of the waterproof sleeve (71) extends into the first electrode (1), while the other end of the waterproof sleeve (71) is located outside the first electrode (1).

8. The electric spark source emitting probe for horizontal drilling according to claim 3, characterized in that, There are gaps between the outer wall of the power transmission component (7) and the outer wall of the second electrode (2) and the inner wall of the first electrode (1).

9. The electric spark source emitting probe for horizontal drilling according to claim 2, characterized in that, At least one mounting hole (42) is provided along the circumferential direction of the conductive element (4), and the protrusion (41) is adapted to be connected to the mounting hole (42).

10. A spark source emitting probe for horizontal drilling according to claim 2, characterized in that, The locking element (5) is provided with a waterproof layer.

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