Push rod suitable for underground drilling

Abstract

The utility model relates to the technical field of mine stress safety monitoring equipment, in particular to a push rod suitable for underground drilling, which comprises a connecting rod and an extension rod, and the first end part of the connecting rod is detachably connected with a drilling stress meter through a first splicing structure; the lengthening rod comprises a plurality of splicing rods, the adjacent splicing rods are detachably connected through a second splicing structure, and the first end of the lengthening rod is detachably connected with the second end of the connecting rod through the second splicing structure; the splicing mode of the first splicing structure is different from the splicing mode of the second splicing structure, so that the connection of the extension rod is not affected when the connecting rod and the borehole stress meter are disassembled and assembled. According to the utility model, the connecting rod and the borehole stress meter, the connecting rod and the extension rod, and the plurality of splicing rods are connected in a splicing manner, and the splicing manner does not adopt an external connection structure, so that compared with the traditional tools using screws, nuts, iron wires, rolling belts and the like, the dismounting and mounting are convenient, the structure is stable, and the cost is low. And the firmware cost does not need to be additionally increased.

Description

Technical Field

[0001] The utility model relates to the technical field of mine stress safety monitoring equipment, in particular to a push rod suitable for underground drilling. Background Art

[0002] Mine stress monitoring is to collect and analyze data by installing borehole stress gauges during the mining process on the working face, and to make effective support or protection designs for the next section of the working face based on the data analysis results.

[0003] When installing a borehole stress gauge, the stress gauge is often installed manually by pushing a push rod. The traditional connection method between the push rods is to pass 2-3 mm screws and nuts through the reserved holes, and use tools such as wires and rolling strips to pass through the reserved holes for connection. This method has great disadvantages, mainly because the screws and nuts need to be disassembled back and forth, which is troublesome, especially after the equipment enters the coal slime area, the disassembly work is more troublesome, and the screws and nuts are small and inconvenient to manage and easy to lose. Tools such as wires and rolling strips are easy to break and cause insecurity. Therefore, they need to be disassembled and replaced back and forth, resulting in increased cost consumption. Utility Model Content

[0004] The utility model provides a push rod suitable for underground drilling, which is used to solve the above-mentioned drawbacks of the push rod in the prior art and realize simple and convenient installation of the push rod.

[0005] The utility model provides a push rod suitable for downhole drilling, comprising a connecting rod and an extension rod, wherein the first end of the connecting rod is detachably connected to a drilling stress gauge via a first splicing structure; the extension rod comprises a plurality of splicing rods connected in sequence, two adjacent splicing rods are detachably connected via a second splicing structure, and the first end of the extension rod is detachably connected to the second end of the connecting rod via a second splicing structure; the splicing method of the first splicing structure is different from the splicing method of the second splicing structure, so that the connection of the extension rod is not affected when the connecting rod and the drilling stress gauge are disassembled and assembled.

[0006] According to a push rod suitable for downhole drilling provided by the utility model, the first splicing structure is a threaded rotating splicing structure, and the second splicing structure is a fastener engaging splicing structure or a threaded rotating splicing structure that is rotated in the opposite direction to the first splicing structure.

[0007] According to a push rod suitable for downhole drilling provided by the utility model, the first splicing structure includes a threaded hole and an external threaded joint for matching splicing, the threaded hole is arranged on the drilling stress gauge, and the external threaded joint is arranged at the first end of the connecting rod; the second splicing structure includes a spring pin and a pin hole for matching connection, the second end of the connecting rod and the first end of the splicing rod are both axially provided with a light hole, the pin hole is arranged on the circumferential surface of the light hole, the second end of the splicing rod is provided with an axial connecting head, and the spring pin is embedded on the circumferential surface of the axial connecting head.

[0008] According to a push rod suitable for downhole drilling provided by the utility model, a mounting blind hole is arranged on the circumferential surface of the axial connecting head, the spring pin comprises a return spring and a locking pin, the first end of the return spring is fixed in the mounting blind hole, and the locking pin is connected to the second end of the return spring.

[0009] According to a push rod suitable for downhole drilling provided by the utility model, the second splicing structure is provided with a guiding mechanism, which is suitable for guiding the relative position of the spring pin and the pin hole through the guiding mechanism to achieve the matching connection between the spring pin and the pin hole.

[0010] According to a push rod suitable for downhole drilling provided by the utility model, the guide mechanism is a guide groove, which is opened on the inner wall of the light hole along the axial direction of the light hole, one end of the guide groove is located at the opening of the light hole, and the other end is connected to the pin hole.

[0011] According to a push rod suitable for downhole drilling provided by the utility model, the inner wall of the light hole is gradually thickened in a spiral from the orifice of the light hole toward the direction of the pin hole to form a first spiral gradual protrusion on the inner wall of the light hole, and the pin hole is located at the end of the first spiral gradual protrusion; the outer peripheral surface of the axial connector is gradually thickened in a spiral from the end of the axial connector toward the direction of the spring pin to form a second spiral gradual protrusion, and the spring pin is located at the end of the second spiral gradual protrusion; the first spiral gradual protrusion and the second spiral gradual protrusion have the same contour and cooperate with each other to guide to form the guide mechanism.

[0012] According to a push rod suitable for downhole drilling provided by the utility model, the first splicing structure includes a first threaded hole and a first external threaded joint that are spliced ​​together, the first threaded hole is arranged on the drilling stress gauge, and the first external threaded joint is arranged at the first end of the connecting rod; the second splicing structure includes a second threaded hole and a second external threaded joint that are spliced ​​together, the second threaded hole is arranged at the second end of the connecting rod and at the first end of the spliced ​​rod; the second external threaded joint is arranged at the second end of the spliced ​​rod; the first threaded hole and the second threaded hole have opposite thread directions, and the first external threaded joint and the second external threaded joint have opposite thread directions.

[0013] According to a push rod suitable for underground drilling provided by the utility model, a contraction support frame is arranged on the outer circumference of the connecting rod and the extension rod, and the support frame is connected with a support wheel.

[0014] According to a push rod suitable for downhole drilling provided by the utility model, the first splicing structure also includes a bell-mouth guide body facing the connecting rod, the bell-mouth guide body is fixed on the drilling stress gauge, and the connection part between the first end of the connecting rod and the drilling stress gauge is located at the center of the bell-mouth guide body.

[0015] The push rod suitable for downhole drilling provided by the utility model is composed of a connecting rod and an extension rod. The connecting rod and the drilling stress gauge, the connecting rod and the extension rod, and a plurality of spliced ​​rods are connected in the form of splicing. The splicing form does not require an external connection structure. Compared with traditional tools such as screws, nuts, iron wires, and rolled strips, it is easy to disassemble and assemble, has a stable structure, and does not require additional firmware costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 The utility model is a schematic diagram of the overall structure of a push rod suitable for underground drilling.

[0018] Figure 2 It is a structural schematic diagram of the connecting rod provided by the utility model.

[0019] Figure 3 It is a structural schematic diagram of the splicing rod provided by the utility model.

[0020] Figure 4 It is a schematic diagram of the aperture structure of the light hole provided by the utility model.

[0021] Figure numerals: 1, connecting rod; 2, extension rod; 3, splicing rod; 4, spring pin; 5, pin hole; 6, light hole; 7, axial connector; 8, guide groove. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0024] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood in specific circumstances.

[0025] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0026] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model embodiment. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0027] Combine the following Figure 1 to Figure 4 The specific structure of the push rod of the utility model suitable for underground drilling is described.

[0028] An embodiment of the utility model provides a push rod suitable for drilling holes in a well, see Figure 1 As shown, it includes a connecting rod 1 and an extension rod 2, wherein the first end of the connecting rod 1 is detachably connected to the drilling stress gauge through a first splicing structure; the extension rod 2 includes a plurality of splicing rods 3 connected in sequence, two adjacent splicing rods 3 are detachably connected through a second splicing structure, and the first end of the extension rod 2 is detachably connected to the second end of the connecting rod 1 through the second splicing structure; the splicing method of the first splicing structure is different from the splicing method of the second splicing structure, so that the connection of the extension rod 2 is not affected when the connecting rod 1 and the drilling stress gauge are disassembled and assembled.

[0029] It can be understood that the push rod suitable for downhole drilling in this embodiment is composed of a connecting rod 1 and an extension rod 2. The connecting rod 1 and the drilling stress gauge, the connecting rod 1 and the extension rod 2, and the multiple spliced ​​rods 3 are all connected in the form of splicing. The splicing form does not require an external connection structure. Compared with the traditional use of screws, nuts, iron wire, rolling strips and other tools, it is easy to disassemble and assemble, the structure is stable, and no additional firmware cost is required.

[0030] When installing the push rod for underground drilling in this embodiment, the drilling stress gauge is first placed in the borehole, and then the connecting rod 1 is connected to the drilling stress gauge through the first splicing structure, and then the extension rod 2 is connected to the connecting rod 1 through the second splicing structure, and the drilling stress gauge is pushed to the target position in the borehole through the extension rod 2. The extension rod 2 can be adjusted in length, and the corresponding number of splicing rods 3 are selected according to the target position of the drilling stress gauge to splice the extension rod 2 of the corresponding length.

[0031] It should be understood that the first splicing structure and the second splicing structure of this embodiment adopt different splicing structures. After the drilling stress gauge reaches the specified position, the connecting rod 1 can be separated from the drilling stress gauge, so as to facilitate the installation of other drilling stress gauges in the same borehole through the push rod.

[0032] Regarding the structural design of the first splicing structure and the second splicing structure, the first splicing structure can be a threaded rotating splicing structure. After the drilling stress gauge reaches the specified position, the push rod can be separated from the drilling stress gauge by applying force in the reverse rotating direction of the first splicing structure. The second splicing structure can be a fastener-engaged splicing structure or a threaded rotating splicing structure that is rotated in the reverse direction of the first splicing structure. In this way, when the first splicing structure is disconnected, the splicing relationship between the connecting rod 1 and the extension rod 2 and the splicing relationship between the splicing rods 3 in the extension rod 2 will not be affected.

[0033] In some specific embodiments of the push rod of the utility model suitable for underground drilling, Figure 1 , Figure 2 and Figure 3 As shown, the first splicing structure includes a threaded hole and an external threaded joint that are spliced ​​together, and the threaded hole is set on the drilling stress gauge (not shown in the figure), see Figure 2 As shown, the external threaded joint is arranged at the first end of the connecting rod 1; see Figure 3 As shown, the second splicing structure includes a spring pin 4 and a pin hole 5 that are matched and connected. The second end of the connecting rod 1 and the first end of the splicing rod 3 are both axially provided with a light hole 6, and the pin hole 5 is provided on the circumferential surface of the light hole 6. An axial connecting head 7 is provided at the second end of the splicing rod 3, and a spring pin 4 is embedded on the circumferential surface of the axial connecting head 7.

[0034] It can be understood that the first splicing structure in this embodiment is a threaded screw-on splicing structure consisting of a threaded hole and an external threaded joint, while the second splicing structure is a fastener-engaged splicing structure consisting of a spring pin 4 and a pin hole 5. Whether it is the connection between the connecting rod 1 and the borehole stress gauge or the connection between the connecting rod 1 and the extension rod 2, they are all assembled using their own structure, without the need to use other additional connectors for connection, with a simple structure and convenient operation. Of course, if only a single borehole stress gauge needs to be installed in the borehole, the first splicing structure and the second splicing structure can also use the same splicing structure.

[0035] Specifically, in some specific examples, a mounting blind hole is provided on the circumferential surface of the axial connector 7, and the spring pin 4 includes a return spring and a locking pin. The first end of the return spring is fixed in the mounting blind hole, and the locking pin is connected to the second end of the return spring. The splicing of the connecting rod 1 and the extension rod 2 is achieved by connecting the axial connector 7 of the extension rod 2 with the light hole 6 of the connecting rod 1. The spring pin 4 on the axial connector 7 is aligned with the pin hole 5 of the light hole 6, and the locking pin of the spring pin 4 is pressed to push the axial connector 7 into the light hole 6. When the locking pin of the spring pin 4 reaches the position of the pin hole 5, under the action of the return spring of the spring pin 4, the locking pin of the spring pin 4 enters the pin hole 5 to achieve locking, and at this time, the connecting rod 1 and the extension rod 2 are connected together. When it is necessary to disassemble the connecting rod 1 and the extension rod 2, the locking pin of the spring pin 4 is pressed to disengage the locking pin from the pin hole 5, and then the extension rod 2 is pulled to disengage the axial connector 7 of the extension rod 2 from the light hole 6 of the connecting rod 1, and the disassembly of the connecting rod 1 and the extension rod 2 is completed. The above-mentioned disassembly and assembly splicing structure is also adopted between the multiple splicing rods 3 constituting the extension rod 2, which will not be described in detail here.

[0036] In some other embodiments of the push rod suitable for underground drilling provided by the utility model, the second splicing structure is further provided with a guide mechanism, which is suitable for guiding the relative position of the spring pin 4 and the pin hole 5 through the guide mechanism to achieve the matching connection between the spring pin 4 and the pin hole 5. The setting of the guide mechanism can facilitate the guidance of the spring pin 4 relative to the pin hole 5 when assembling the second splicing structure, and complete the assembly between the connecting rod 1 and the extension rod 2 and between the multiple splicing rods 3.

[0037] Specifically, in some specific examples, the guide mechanism is a guide groove 8, combined with Figure 3 and Figure 4 As shown, the guide groove 8 is opened on the inner wall of the light hole 6 along the axial direction of the light hole 6, one end of the guide groove 8 is located at the opening of the light hole 6, and the other end is connected to the pin hole 5. Taking the splicing of the connecting rod 1 and the extension rod 2 as an example, when the connecting rod 1 and the extension rod 2 are spliced, the axial connector 7 of the extension rod 2 faces the light hole 6 of the connecting rod 1. At this time, the extension rod 2 is adjusted circumferentially so that the spring pin 4 on the axial connector 7 of the extension rod 2 is aligned with the guide groove 8, and the axial connector 7 is pushed into the light hole 6. The spring pin 4 moves along the guide groove 8 toward the pin hole 5 and can be accurately inserted into the pin hole 5.

[0038] In other specific examples, the inner wall of the light hole 6 gradually thickens in a spiral manner from the orifice of the light hole 6 toward the direction of the pin hole 5 to form a first spiral gradual protrusion on the inner wall of the light hole 6, and the pin hole 5 is located at the end of the first spiral gradual protrusion; the outer peripheral surface of the axial connector 7 gradually thickens in a spiral manner from the end of the axial connector 7 toward the direction of the spring pin 4 to form a second spiral gradual protrusion, and the spring pin 4 is located at the end of the second spiral gradual protrusion; the first spiral gradual protrusion and the second spiral gradual protrusion have the same contour and cooperate with each other to guide to form a guiding mechanism. The first spiral gradual protrusion and the second spiral gradual protrusion in this example are similar to the structure of the internal and external thread matching guide. The first spiral gradual protrusion makes the light hole 6 appear to have a large aperture, and then the inner diameter gradually decreases toward the inside of the light hole 6, while the second spiral gradual protrusion makes the axial connector 7 appear to have a smaller diameter at the end, and the diameter increases as it gets closer to the spring pin 4. The contours of the first spiral gradual protrusion and the second spiral gradual protrusion are consistent, so that the light hole 6 and the axial connector 7 form a spiral guide match. In this way, when connecting and assembling, there is no need to perform circumferential alignment adjustment. As long as they are inserted into each other, they can achieve matching under the guiding action of the first spiral gradual protrusion and the second spiral gradual protrusion, and finally the spring pin 4 is accurately delivered to the pin hole 5 to complete the snap-fit ​​assembly.

[0039] In some other specific embodiments of a push rod suitable for downhole drilling of the utility model, the first splicing structure includes a first threaded hole and a first external threaded joint that are spliced ​​together, the first threaded hole is arranged on the drilling stress gauge, and the first external threaded joint is arranged at the first end of the connecting rod 1; the second splicing structure includes a second threaded hole and a second external threaded joint that are spliced ​​together, the second threaded hole is arranged at the second end of the connecting rod 1 and at the first end of the splicing rod 3; the second external threaded joint is arranged at the second end of the splicing rod 3; the first threaded hole and the second threaded hole have opposite thread directions, and the first external threaded joint and the second external threaded joint have opposite thread directions.

[0040] It can be understood that the first splicing structure in this embodiment is a first threaded spin-on splicing structure composed of a first threaded hole and a first external threaded joint, and the second splicing structure is a second threaded spin-on splicing structure composed of a second threaded hole and a second external threaded joint. The first threaded spin-on splicing structure and the second threaded spin-on splicing structure have opposite thread directions. When the connecting rod 1 and the drilling stress gauge are disassembled, the first threaded spin-on splicing structure is reversely rotated through the second end of the extension rod 2 outside the drill hole. At this time, for the second threaded spin-on splicing structure, the disassembly torque applied to the first threaded spin-on splicing structure will make the second threaded spin-on splicing structure more stable.

[0041] On the basis of the above-mentioned embodiments, after the drilling stress gauge is installed at the target position, the connecting rod 1 and the drilling stress gauge can be disassembled so that other stress gauges can be installed in the borehole. When the drilling stress gauge completes the stress measurement, the drilling stress gauge needs to be taken out of the borehole. At this time, the connecting rod 1 needs to be reconnected with the drilling stress gauge. Since the borehole may be relatively deep, the connecting rod 1 and the drilling stress gauge may not be effectively connected relative to each other after the push rod is drilled. In this embodiment, some guiding devices are added to realize the reconnection of the connecting rod 1 and the drilling stress gauge.

[0042] Specifically, in some specific examples, a contraction support frame is provided on the outer circumference of the connecting rod 1 and the extension rod 2, and the support frame is connected to a support wheel. When the drilling stress gauge is installed in the borehole, the contraction support frame is opened to the extent of the hole diameter, and the drilling stress gauge is continuously pushed to the target position, and then the connection between the connecting rod 1 and the drilling stress gauge is disconnected, and the push rod is withdrawn from the borehole. When the connecting rod 1 needs to be connected to the drilling stress gauge again, the contraction support frame is similarly opened to the extent of the hole diameter, and the first end of the connecting rod 1 supported by the contraction support frame to the push rod accurately reaches the connection position with the drilling stress gauge for connection.

[0043] In some other specific examples, the first splicing structure further includes a bell-mouth guide body facing the connecting rod 1, the bell-mouth guide body is fixed on the drilling stress gauge, and the connection part between the first end of the connecting rod 1 and the drilling stress gauge is located at the center of the bell-mouth guide body. The bell-mouth guide body forms an inclined guide structure around the connection part between the connecting rod 1 and the drilling stress gauge, and when the connecting rod 1 of the push rod reaches the position of the drilling stress gauge in the borehole, regardless of whether the connection position is aligned, the bell-mouth guide body will make the first end of the connecting rod 1 reach its center position along the bell-mouth guide body, that is, reach the connection part, so as to realize the accurate connection between the connecting rod 1 and the drilling stress gauge.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model 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 make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A push rod suitable for underground drilling, characterized in that: include: A connecting rod (1), wherein a first end portion of the connecting rod (1) is detachably connected to a borehole stress gauge via a first splicing structure; An extension rod (2), the extension rod (2) comprising a plurality of splicing rods (3) connected in sequence, two adjacent splicing rods (3) being detachably connected via a second splicing structure, and a first end portion of the extension rod (2) being detachably connected to a second end portion of the connecting rod (1) via the second splicing structure; The splicing method of the first splicing structure is different from the splicing method of the second splicing structure, so that the connection of the extension rod (2) is not affected when the connecting rod (1) and the drilling stress gauge are disassembled.

2. The push rod suitable for downhole drilling according to claim 1, characterized in that: The first splicing structure is a threaded rotating splicing structure, and the second splicing structure is a fastener-engaging splicing structure or a threaded rotating splicing structure that is rotated in the opposite direction to the first splicing structure.

3. The push rod suitable for downhole drilling according to claim 2, characterized in that: The first splicing structure comprises a threaded hole and an external threaded joint that are matched and spliced ​​together, the threaded hole is arranged on the borehole stress gauge, and the external threaded joint is arranged at the first end of the connecting rod (1); The second splicing structure comprises a spring pin (4) and a pin hole (5) which are connected in a matching manner. The second end of the connecting rod (1) and the first end of the splicing rod (3) are both provided with a light hole (6) along the axial direction. The pin hole (5) is provided on the circumferential surface of the light hole (6). The second end of the splicing rod (3) is provided with an axial connecting head (7), and the spring pin (4) is embedded on the circumferential surface of the axial connecting head (7).

4. The push rod suitable for downhole drilling according to claim 3, characterized in that: A mounting blind hole is arranged on the circumferential surface of the axial connector (7), and the spring pin (4) comprises a return spring and a locking pin, wherein the first end of the return spring is fixed in the mounting blind hole, and the locking pin is connected to the second end of the return spring.

5. The push rod suitable for downhole drilling according to claim 3, characterized in that: The second splicing structure is provided with a guiding mechanism, which is suitable for guiding the relative position of the spring pin (4) and the pin hole (5) through the guiding mechanism, so as to achieve the matching connection between the spring pin (4) and the pin hole (5).

6. The push rod suitable for downhole drilling according to claim 5, characterized in that: The guide mechanism is a guide groove (8), which is opened on the inner wall of the light hole (6) along the axial direction of the light hole (6), one end of the guide groove (8) is located at the opening of the light hole (6), and the other end is connected to the pin hole (5).

7. The push rod suitable for downhole drilling according to claim 5, characterized in that: The inner wall of the light hole (6) gradually thickens in a spiral from the opening of the light hole (6) toward the pin hole (5) to form a first spiral gradual protrusion on the inner wall of the light hole (6), and the pin hole (5) is located at the end of the first spiral gradual protrusion; the outer peripheral surface of the axial connector (7) gradually thickens in a spiral from the end of the axial connector (7) toward the spring pin (4) to form a second spiral gradual protrusion, and the spring pin (4) is located at the end of the second spiral gradual protrusion; the first spiral gradual protrusion and the second spiral gradual protrusion have the same profile and cooperate with each other to guide each other to form the guide mechanism.

8. The push rod suitable for downhole drilling according to claim 2, characterized in that: The first splicing structure comprises a first threaded hole and a first external threaded joint that are spliced ​​together, the first threaded hole is arranged on the drilling stress gauge, and the first external threaded joint is arranged at the first end of the connecting rod (1); The second splicing structure comprises a second threaded hole and a second external threaded joint for matching splicing, the second threaded hole being arranged at the second end of the connecting rod (1) and the first end of the splicing rod (3); the second external threaded joint being arranged at the second end of the splicing rod (3); The first threaded hole and the second threaded hole have opposite thread directions, and the first external threaded joint and the second external threaded joint have opposite thread directions.

9. The push rod suitable for downhole drilling according to any one of claims 1 to 8, characterized in that: A contraction support frame is provided on the outer circumference of the connecting rod (1) and the extension rod (2), and the support frame is connected to a support wheel.

10. The push rod suitable for downhole drilling according to any one of claims 1 to 8, characterized in that: The first splicing structure also includes a bell-mouth guide body facing the connecting rod (1), the bell-mouth guide body is fixed on the drilling stress gauge, and the connection part between the first end of the connecting rod (1) and the drilling stress gauge is located at the center of the bell-mouth guide body.

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