High performance screw drill resistant to impact and wear

Abstract

The utility model belongs to screw drill technical field, specifically provides a kind of high-performance screw drill of impact resistance wear resistance, including motor component, universal shaft component and transmission shaft component connected in order from top to bottom successively.The transmission shaft component includes transmission shaft body, transmission housing and two TC bearings.TC bearing includes static ring and moving ring, and the rotary fit surface of moving ring and static ring is respectively equipped with first wear-resistant alloy layer and second wear-resistant alloy layer, and two are mutually lapping arrangement, can form the contact surface of three forms of hard against hard, soft against hard, soft against soft.When being deformed by radial impact force, soft against hard, soft against soft two contact surfaces can absorb impact force, eliminate deformation amount.Compared with the hard against hard wear-resistant contact surface formed by existing TC bearing, the present application can reduce the phenomenon that high-hardness wear-resistant alloy layer is affected by radial deformation to appear crack, drop piece, so that transmission shaft component has the advantages of wear resistance and impact resistance, help to improve the service life of screw drill.

Description

Technical Field

[0001] This application belongs to the field of screw drilling tool technology, specifically a high-performance screw drilling tool that is impact-resistant and wear-resistant. Background Technology

[0002] Screw drills are a common type of downhole power drilling equipment in the oil drilling field. Screw drills are mainly composed of bypass valve components, motor components, universal joint components, and drive shaft components. These components are connected in sequence from top to bottom, and the lower end of the drive shaft assembly is connected to the drill bit.

[0003] The drive shaft assembly transmits the rotational power from the universal joint assembly to the drill bit, while also bearing the axial and radial impact loads generated by drilling pressure. The drive shaft assembly is a critical component of screw drills, and its structural performance directly affects the working efficiency and service life of the drill. The bearings within the drive shaft assembly are its most important and most prone to failure; therefore, the lifespan of the drive shaft assembly is directly determined by the length of time the bearings remain in use.

[0004] To improve the wear resistance of bearings, existing technologies mostly involve embedding or applying wear-resistant hard alloy materials, such as carbides or PDC hard alloy blocks, onto the mating surfaces of the bearing. However, since the higher the hardness of most wear-resistant alloy materials, the weaker their impact resistance, when the bearing body is subjected to impact loads and deforms, the wear-resistant alloy is prone to cracking or even chipping. Chipping will accelerate bearing wear and may even cause the screw to seize and be damaged. Utility Model Content

[0005] Based on the above-mentioned technical problems, this application provides a high-performance screw drill tool that is impact-resistant and wear-resistant, in order to solve the technical problem that the bearings of the drive shaft assembly of the screw drill tool have poor impact resistance and durability in the prior art.

[0006] To achieve the above objectives, the technical solution adopted in this application is: to provide a high-performance screw drill tool that is impact-resistant and wear-resistant, comprising a motor component, a universal joint component, and a transmission shaft component connected sequentially from top to bottom, wherein the transmission shaft component includes:

[0007] The drive shaft body has its upper end connected to the universal joint component and its lower end used to connect to the drill bit.

[0008] A transmission housing, coaxially sleeved on the outside of the transmission shaft body; and

[0009] Two TC bearings are fitted onto the outer side of the drive shaft body, one above the other. Each TC bearing includes a stationary ring and a moving ring. The stationary ring is connected to the drive housing, and the moving ring is connected to the drive shaft body. The outer peripheral wall of the moving ring, which mates with the stationary ring, is provided with multiple first wear-resistant alloy layers at equal intervals along its axial direction. The inner wall of the stationary ring, which mates with the moving ring, is provided with second wear-resistant alloy layers at equal intervals along its axial direction. The first and second wear-resistant alloy layers are staggered along the axial length of the drive shaft body and have overlapping areas. Both the first and second wear-resistant alloy layers are annular structures formed by splicing multiple arc-shaped wear-resistant alloy blocks.

[0010] In one possible implementation, the drive shaft component further includes a plurality of thrust bearings sleeved on the outside of the drive shaft body, the plurality of thrust bearings being connected in series along the axial direction of the drive shaft body, and the thrust bearings being located between two of the TC bearings.

[0011] In one possible implementation, a PDC drill bit is connected to the lower end of the drive shaft body.

[0012] In one possible implementation, multiple arc-shaped wear-resistant alloy blocks used to splice together to form the first wear-resistant alloy layer or the second wear-resistant alloy layer are arranged at equal intervals along a ring.

[0013] In one possible implementation, the first wear-resistant alloy layer overlaps two adjacent second wear-resistant alloy layers at both ends along the axial length of the drive shaft body; or

[0014] The second wear-resistant alloy layer overlaps with two adjacent first wear-resistant alloy layers at both ends along the axial length of the transmission shaft body.

[0015] In one possible implementation, the outer peripheral wall of the moving ring that mates with the stationary ring and the inner wall of the stationary ring that mates with the moving ring are respectively provided with buffer energy-absorbing layers. The first wear-resistant alloy layer and the second wear-resistant alloy layer are respectively disposed on the corresponding buffer energy-absorbing layers. The wall thickness of the buffer energy-absorbing layer is greater than the thickness of the first wear-resistant alloy layer and the second wear-resistant alloy layer. The hardness of the buffer energy-absorbing layer is less than the hardness of the first wear-resistant alloy layer and the second wear-resistant alloy layer.

[0016] In one possible implementation, the universal joint component includes:

[0017] The universal joint connecting rod has a motor connector at its upper end that connects to the motor component, and a drive shaft connector at its lower end that connects to the drive shaft body; and

[0018] The universal joint housing is coaxially sleeved on the outside of the universal joint connecting rod.

[0019] In one possible implementation, the drive shaft connector is provided with a water cap, the water cap having a water hole that communicates with the center hole of the drive shaft body.

[0020] In one possible implementation, the motor component includes:

[0021] Motor housing;

[0022] A stator of uniform wall thickness is disposed on the inner wall of the motor housing; and

[0023] The screw body is located in the inner hole of the stator with equal wall thickness and rotates with the stator with equal wall thickness. The lower end of the screw body is connected to the universal joint component.

[0024] In one possible implementation, the constant wall thickness stator includes:

[0025] A stator sleeve, disposed inside the motor housing and detachably connected to the motor housing, has a helical groove on its inner wall; and

[0026] A rubber helix of equal wall thickness is disposed inside the stator sleeve, the outer wall of the rubber helix is ​​in contact with the inner wall of the helical groove, and the screw body is disposed in the inner hole of the rubber helix.

[0027] Compared with the prior art, the beneficial effects of the impact-resistant and wear-resistant high-performance screw drill bit provided in this application are:

[0028] The impact-resistant and wear-resistant high-performance screw drill bit provided in this application includes a motor component, a universal joint component, and a drive shaft component. The drive shaft component includes a drive shaft body, a drive housing, and two TC bearings. The rotating mating surfaces of the moving and stationary rings of the TC bearings are respectively provided with a first wear-resistant alloy layer and a second wear-resistant alloy layer, thereby improving the wear resistance of the TC bearings. Multiple first and second wear-resistant alloy layers are evenly spaced on their respective substrates and overlap each other, forming three types of contact surfaces: hard-to-hard, soft-to-hard, and soft-to-soft. The hard-to-hard contact surface has better wear resistance and can improve the service life of the bearing, while the soft-to-hard and soft-to-soft contact surfaces have better impact resistance. When subjected to radial impact force deformation, because the substrate materials of the stationary and moving rings are relatively soft, the soft-to-hard and soft-to-soft contact surfaces can act as buffers to absorb energy, eliminating the deformation and absorbing the impact force. Compared with the hard-on-hard wear-resistant contact surface formed by existing TC bearings, this application has a better impact resistance to radial impact force, which can reduce the phenomenon of cracking and chipping of high-hardness wear-resistant alloy layer due to radial deformation. This makes the drive shaft component have the advantages of both wear resistance and impact resistance, which helps to improve the service life of screw drills. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 An assembly structure diagram of the impact-resistant and wear-resistant high-performance screw drill provided in the embodiments of this application;

[0031] Figure 2 This is a schematic diagram of the structure of the drive shaft component in an embodiment of this application;

[0032] Figure 3 This is a three-dimensional schematic diagram of the TC bearing in the embodiments of this application;

[0033] Figure 4 This is a planar sectional view of the TC bearing in an embodiment of this application;

[0034] Figure 5 for Figure 4 Enlarged view of part A in the middle;

[0035] Figure 6 This is a schematic diagram of the universal joint component in the embodiments of this application;

[0036] Figure 7 for Figure 6 Enlarged view of part B in the middle;

[0037] Figure 8 This is an assembly diagram of the motor components in an embodiment of this application;

[0038] Figure 9 This is a three-dimensional schematic diagram of the stator in the embodiments of this application;

[0039] Explanation of reference numerals in the attached figures:

[0040] 1. Motor components; 11. Motor housing; 12. Stator with equal wall thickness; 121. Stator sleeve; 122. Rubber helix; 2. Universal joint components; 21. Universal joint connecting rod; 211. Motor connector; 212. Drive shaft connector; 2121. Water hole; 22. Universal joint housing; 3. Drive shaft components; 31. Drive shaft body; 32. Drive housing; 33. TC bearing; 331. Stationary ring; 3311. Second wear-resistant alloy layer; 3312. Buffer energy absorption layer; 332. Moving ring; 3321. First wear-resistant alloy layer; 34. Thrust bearing. Detailed Implementation

[0041] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0042] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0043] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0044] Furthermore, 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" or "several" means two or more, unless otherwise explicitly specified.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0046] Please refer to the following: Figures 1 to 9 The impact-resistant and wear-resistant high-performance screw drill provided in the embodiments of this application will be described below.

[0047] Please see Figures 1 to 9This application provides a high-performance, impact-resistant and wear-resistant screw drill bit, comprising a motor component 1, a universal joint component 2, and a drive shaft component 3 connected sequentially from top to bottom. The drive shaft component 3 includes a drive shaft body 31, a drive housing 32, and two TC bearings 33. The upper end of the drive shaft body 31 is connected to the universal joint component, and the lower end is used to connect to the drill bit. The drive housing 32 is coaxially sleeved on the outside of the drive shaft body 31. Two TC bearings 33 are sleeved on the outside of the drive shaft body 31, one above the other. Each TC bearing 33 includes a stationary ring 331 and a moving ring 332. The stationary ring 331 is connected to the drive housing 32, and the moving ring 332 is connected to the drive shaft body 31. The outer peripheral wall of the moving ring 332, which mates with the stationary ring 331, is provided with multiple first wear-resistant alloy layers 3321 at equal intervals along its axial direction. The inner wall of the stationary ring 331, which mates with the moving ring 332, is provided with second wear-resistant alloy layers 3311 at equal intervals along its axial direction. The first wear-resistant alloy layers 3321 and the second wear-resistant alloy layers 3311 are staggered along the axial length of the drive shaft body 31 and have overlapping areas. Both the first wear-resistant alloy layers 3321 and the second wear-resistant alloy layers 3311 are annular structures formed by splicing multiple arc-shaped wear-resistant alloy blocks.

[0048] Compared with the prior art, the beneficial effects of the impact-resistant and wear-resistant high-performance screw drill provided in this application are:

[0049] The impact-resistant and wear-resistant high-performance screw drill provided in this application includes a motor component 1, a universal joint component 2, and a transmission shaft component 3. The transmission shaft component 3 includes a transmission shaft body 31, a transmission housing 32, and two TC bearings 33. The rotating mating surfaces of the moving ring 332 and the stationary ring 331 of the TC bearings 33 are respectively provided with a first wear-resistant alloy layer 3321 and a second wear-resistant alloy layer 3311, thereby improving the wear resistance of the TC bearings 33. Multiple first wear-resistant alloy layers 3321 and second wear-resistant alloy layers 3311 are equally spaced on their respective substrates, and they overlap each other to form three types of contact surfaces: hard (referring to wear-resistant alloy material) to hard, soft (referring to bearing substrate material or buffer energy-absorbing layer 3312 in the following text), hard to soft, and soft to soft.

[0050] Among them, hard-on-hard contact surfaces offer better wear resistance and can improve bearing life, while soft-on-hard and soft-on-soft contact surfaces offer better impact resistance. When deformed by radial impact force, the soft-on-hard and soft-on-soft contact surfaces, due to the relatively soft matrix materials of the stationary ring 331 and moving ring 332, can act as buffers to absorb energy and eliminate deformation, thus absorbing the impact force. Compared with the hard-on-hard wear-resistant contact surface formed by the existing TC bearing 33, this application has better impact resistance to radial impact force, reducing the cracking and spalling of the high-hardness wear-resistant alloy layer caused by radial deformation. This gives the drive shaft component 3 both wear resistance and impact resistance, helping to improve the service life of the screw drill bit.

[0051] According to their installation positions, TC bearings 33 can be divided into upper bearings and lower bearings. During operation, the screw drill motor drives the universal joint connecting rod 21, the drive shaft body 31, the moving ring 332 of TC bearing 33, the drill bit, and other components to rotate together, causing the drill bit to break rocks and drill at high speed. During drilling, the axial and radial impact forces on the drill bit are controlled by TC bearings 33, especially the stationary ring 331 of the lower TC bearing 33.

[0052] To ensure that the TC bearing 33 possesses both impact resistance and wear resistance, in this embodiment, the first wear-resistant alloy layer 3321 and the second wear-resistant alloy layer 3311 are staggered and have overlapping areas, thus forming a structure as follows: Figure 5 The diagram shows three types of mating contact surfaces combining hard and soft materials. The hard contact surfaces between the first and second wear-resistant alloys fit together, improving the wear resistance of the TC bearing 33. When the bearing stationary ring 331 deforms under radial impact, the material matrix between adjacent second wear-resistant alloys and between adjacent first wear-resistant alloys can absorb the deformation. This prevents cracking and chipping of the hard-on-hard contact between the first wear-resistant alloy layer 3321 and the second wear-resistant alloy layer 3311 under radial impact.

[0053] The first wear-resistant alloy layer 3321 and the second wear-resistant alloy layer 3311 are respectively ring structures formed by arranging multiple (e.g., four, six, or eight) wear-resistant alloy blocks along the circumferential direction. Adjacent wear-resistant alloy blocks can be fitted together or spaced at a predetermined angle. The materials of the first wear-resistant alloy layer 3321 and the second wear-resistant alloy layer 3311 can be existing wear-resistant alloy materials such as tungsten carbide and PDC, and can be integrally connected to the stationary or moving ring through existing processing techniques such as inlaying, brazing, and laser high-temperature cladding.

[0054] There are no specific restrictions on the diameter, shape, material, thickness, axial width, and other parameters of the stationary ring 331 and the moving ring 332, as well as the first wear-resistant alloy layer 3321 and the second wear-resistant alloy layer 3311. Users can choose and set these parameters according to their actual needs.

[0055] It should be noted that the motor component 1, universal joint component 2, transmission shaft body 31 and transmission housing 32 in this application embodiment can all be directly selected from existing products on the market, and their specific structures, connection methods and working principles will not be described in detail.

[0056] The screw drill bit provided in this application is suitable for drilling scenarios with uneven geological conditions and frequent radial impact forces. When the drill bit runs relatively stably and is not prone to radial runout, the screw drill bit does not need to have high impact resistance. In this case, the existing TC bearing products with full-coverage wear-resistant alloy materials on the contact surface are still preferred.

[0057] Understandably, in actual manufacturing, the axial length of the moving ring 332 and the stationary ring 331 can be designed to be relatively long (e.g., 1.5-3 times the length of the existing bearing), so that there is sufficient contact length of wear-resistant alloy material layer between the moving ring 332 and the stationary ring 331.

[0058] Please see Figure 1 In some possible embodiments, the drive shaft component 3 further includes a plurality of thrust bearings 34 sleeved on the outside of the drive shaft body 31. The plurality of thrust bearings 34 are connected in series along the axial direction of the drive shaft body 31, and the thrust bearings 34 are located between two TC bearings 33. The thrust bearings 34 use steel balls as rolling elements. The outer surface of the steel balls can be nitrided to form a nitrided layer, which improves the strength of the steel balls and prevents the steel balls from being crushed due to excessive axial impact force.

[0059] In some possible embodiments, a PDC drill bit is connected to the lower end of the drive shaft body 31. The rotation of the drive shaft body 31 drives the PDC drill bit to rotate, thus drilling into the formation. The PDC drill bit is a common drill bit structure in the art, and its specific shape and structure will not be described in detail.

[0060] Please see Figure 4 and Figure 5 In some possible embodiments, the first wear-resistant alloy layer 3321 overlaps with two adjacent second wear-resistant alloy layers 3311 at both ends along the axial length of the drive shaft body 31; or the second wear-resistant alloy layer 3311 overlaps with two adjacent first wear-resistant alloy layers 3321 at both ends along the axial length of the drive shaft body 31.

[0061] In practical use, after a period of use, the base material of the soft-to-hard and soft-to-soft contact surfaces of the TC bearing 33 in this application embodiment is easily worn, and gaps exist between the worn contact surfaces, preventing contact. Contact only occurs when large radial deformation occurs. In this case, the radial impact resistance of the TC bearing 33 will be significantly affected.

[0062] To resolve the above issues, please refer to Figure 5 In some possible embodiments, the outer peripheral wall of the moving ring 332 that mates with the stationary ring 331 and the inner wall of the stationary ring 331 that mates with the moving ring 332 are respectively provided with buffer energy-absorbing layers 3312. A first wear-resistant alloy layer 3321 and a second wear-resistant alloy layer 3311 are respectively disposed on the corresponding buffer energy-absorbing layer 3312. The wall thickness of the buffer energy-absorbing layer 3312 is greater than the thickness of the first wear-resistant alloy layer 3321 and the second wear-resistant alloy layer 3311; the hardness of the buffer energy-absorbing layer 3312 is less than the hardness of the first wear-resistant alloy layer 3321 and the second wear-resistant alloy layer 3311. Specifically, the thickness of the buffer energy-absorbing layer 3312 can be twice that of the first wear-resistant alloy layer 3321 and the second wear-resistant alloy layer 3311.

[0063] In this embodiment, the buffer energy-absorbing layer 3312 can cover the entire contact surface of the stationary ring 331 and the moving ring 332, serving as a buffer pad. It should be noted that the hardness of the buffer energy-absorbing layer 3312 is less than that of the first wear-resistant alloy layer 3321 and the second wear-resistant alloy layer 3311, but should also be greater than the hardness of the base material of the stationary ring 331 and the moving ring 332. Both the first wear-resistant alloy layer 3321 and the second wear-resistant alloy layer 3311 are disposed on the buffer energy-absorbing layer 3312. This arrangement ensures that even after the base material of the contact surface wears down over a period of time, the buffer energy-absorbing layer 3312 can still absorb deformation, preventing a significant decrease in the impact resistance of the TC bearing 33 and maintaining its performance within acceptable limits.

[0064] The buffer energy absorption layer 3312 can be obtained by sintering a mixture of tungsten carbide powder and solder, so that it is firmly formed on the mating contact surface of the stationary ring 331 and the moving ring 332. Of course, the buffer energy absorption layer 3312 can also be other existing materials that meet the hardness requirements.

[0065] Please see Figure 1 , Figure 6 and Figure 7In some possible embodiments, the universal joint component 2 includes a universal joint link 21 and a universal joint housing 22. The upper end of the universal joint link 21 has a motor connector 211 connected to the motor component 1, and the lower end has a drive shaft connector 212 connected to the drive shaft body 31. The universal joint housing 22 is coaxially sleeved on the outside of the universal joint link 21, and the universal joint component 2 can transmit the power of the screw body to the drive shaft body 31. The motor connector 211 and the drive shaft connector 212 can adopt existing universal joint forms such as ball joints.

[0066] Please see Figure 7 The drive shaft connector 212 is equipped with a water cap with a water hole 2121. The water hole 2121 is connected to the center hole of the drive shaft body 31. The drilling fluid enters the center hole of the drive shaft body 31 through the water hole 2121 and is then sprayed out through the drain hole 2121 on the drill bit for cooling, lubrication and chip removal of the drill bit.

[0067] Please see Figure 1 , Figure 8 and Figure 9 The motor component 1 includes a motor housing 11, a stator 12 with equal wall thickness, and a screw body. The stator 12 with equal wall thickness is disposed on the inner wall of the motor housing 11; the screw body is disposed in the inner hole of the stator 12 with equal wall thickness and is rotatably engaged with the stator 12 with equal wall thickness, and the lower end of the screw body is connected to the universal joint component 2.

[0068] The rubber material layer of the equal-thickness stator 12 has a basically uniform wall thickness, resulting in uniform deformation under stress and heat. Compared with the existing unequal-thickness stator 12, it has stronger resistance to deformation and greater product durability. The equal-thickness stator 12 specifically includes a stator sleeve 121 and a rubber helix 122. The stator sleeve 121 is located inside the motor housing 11 and is detachably connected to the motor housing 11. The inner wall of the stator sleeve 121 has a helical groove. The equal-thickness rubber helix 122 is located inside the stator sleeve 121. The outer wall of the rubber helix 122 fits against the inner wall of the helical groove, and the screw body is located in the inner hole of the rubber helix 122.

[0069] The stator sleeve 121 and the inner wall of the motor housing 11 can be connected by a detachable method such as a key connection. When the rubber auger 122 is damaged, the stator sleeve 121 can be directly removed and replaced, preventing long repair times from affecting the construction progress. It is understood that the parts in the above embodiments can be freely combined or deleted to form different combined embodiments. The specific contents of each combined embodiment will not be repeated here. After this description, it can be considered that the present utility model specification has recorded various combined embodiments and can support different combined embodiments.

[0070] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-performance screw drill bit that is impact-resistant and wear-resistant, characterized in that, It includes a motor component (1), a universal joint component (2), and a drive shaft component (3) connected sequentially from top to bottom. The drive shaft component (3) includes: The upper end of the drive shaft body (31) is connected to the universal joint component (2), and the lower end is used to connect to the drill bit; The transmission housing (32) is coaxially sleeved on the outside of the transmission shaft body (31); and Two TC bearings (33) are fitted onto the outer side of the transmission shaft body (31) from top to bottom. Each TC bearing (33) includes a stationary ring (331) and a moving ring (332). The stationary ring (331) is connected to the transmission housing (32), and the moving ring (332) is connected to the transmission shaft body (31). The outer peripheral wall of the moving ring (332) that mates with the stationary ring (331) is provided with multiple first wear-resistant alloy layers (3321) at equal intervals along its axial direction. (331) The inner wall for cooperating with the moving ring (332) is provided with a second wear-resistant alloy layer (3311) at equal intervals along its own axial direction. The first wear-resistant alloy layer (3321) and the second wear-resistant alloy layer (3311) are staggered on the axial length of the transmission shaft body (31) and have overlapping areas. The first wear-resistant alloy layer (3321) and the second wear-resistant alloy layer (3311) are both ring structures formed by splicing multiple arc-shaped wear-resistant alloy blocks.

2. The impact-resistant and wear-resistant high-performance screw drill bit according to claim 1, characterized in that, The drive shaft component (3) also includes a plurality of thrust bearings (34) sleeved on the outside of the drive shaft body (31). The plurality of thrust bearings (34) are connected in series along the axial direction of the drive shaft body (31), and the thrust bearings (34) are located between two TC bearings (33).

3. The impact-resistant and wear-resistant high-performance screw drill bit according to claim 1 or 2, characterized in that, The lower end of the drive shaft body (31) is connected to a PDC drill bit.

4. The impact-resistant and wear-resistant high-performance screw drill bit according to claim 1, characterized in that, Multiple arc-shaped wear-resistant alloy blocks used to splice together to form the first wear-resistant alloy layer (3321) or the second wear-resistant alloy layer (3311) are arranged at equal intervals along a ring.

5. The impact-resistant and wear-resistant high-performance screw drill bit according to claim 1 or 4, characterized in that, The first wear-resistant alloy layer (3321) overlaps with two adjacent second wear-resistant alloy layers (3311) at both ends along the axial length of the transmission shaft body (31); or The second wear-resistant alloy layer (3311) overlaps the two adjacent first wear-resistant alloy layers (3321) at both ends along the axial length of the transmission shaft body (31).

6. The impact-resistant and wear-resistant high-performance screw drill bit according to claim 1 or 4, characterized in that, The outer peripheral wall of the moving ring (332) that mates with the stationary ring (331) and the inner wall of the stationary ring (331) that mates with the moving ring (332) are respectively provided with buffer energy-absorbing layers (3312). The first wear-resistant alloy layer (3321) and the second wear-resistant alloy layer (3311) are respectively provided on the corresponding buffer energy-absorbing layer (3312). The wall thickness of the buffer energy-absorbing layer (3312) is greater than the thickness of the first wear-resistant alloy layer (3321) and the second wear-resistant alloy layer (3311). The hardness of the buffer energy-absorbing layer (3312) is less than the hardness of the first wear-resistant alloy layer (3321) and the second wear-resistant alloy layer (3311).

7. The impact-resistant and wear-resistant high-performance screw drill bit according to claim 1, characterized in that, The universal joint component (2) includes: The universal joint (21) has a motor connector (211) at its upper end that connects to the motor component (1), and a drive shaft connector (212) at its lower end that connects to the drive shaft body (31); and The universal joint housing (22) is coaxially sleeved on the outside of the universal joint connecting rod (21).

8. The impact-resistant and wear-resistant high-performance screw drill bit according to claim 7, characterized in that, The drive shaft connector (212) is provided with a water cap, which has a water hole (2121) that is connected to the center hole of the drive shaft body (31).

9. The impact-resistant and wear-resistant high-performance screw drill bit according to claim 1, characterized in that, The motor component (1) includes: Motor housing (11); A stator (12) of uniform wall thickness is disposed on the inner wall of the motor housing (11); and The screw body is located in the inner hole of the equal wall thickness stator (12) and rotates with the equal wall thickness stator (12). The lower end of the screw body is connected to the universal joint component (2).

10. The impact-resistant and wear-resistant high-performance screw drill bit according to claim 9, characterized in that, The stator (12) with uniform wall thickness includes: A stator sleeve (121) is disposed inside the motor housing (11) and detachably connected to the motor housing (11). The inner wall of the stator sleeve (121) has a helical groove. A rubber helix (122) of equal wall thickness is disposed inside the stator sleeve (121). The outer wall of the rubber helix (122) is in contact with the inner wall of the helical groove. The screw body is disposed in the inner hole of the rubber helix (122).

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