A composite impact screw drill sub with mechanical lifting and spring energy storage

Abstract

The technical solution of the present invention provides a composite impact screw drill bit sub that uses mechanical lifting and spring energy storage, comprising an outer shell, a screw output shaft, an impact shaft, an axial impact structure, and a radial impact assembly. The screw output shaft is rotatably mounted on the inner side of the outer shell, the impact shaft is splined on the outer side of the screw output shaft, the axial impact structure is sleeved on the screw output shaft, and the radial impact assembly is mounted between the outer side of the impact shaft and the inner side of the outer shell. The radial impact assembly is used to generate radial oscillating impact on the impact shaft. The present invention converts the bit pressure into elastic storage through the axial impact structure, which can adapt to different geological conditions within the disc spring stroke. The radial impact energy generated by the radial impact assembly reduces the vibration and slippage of the drill bit during drilling, and the composite impact energy formed by combining the axial impact can maximize the drilling efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of screw drill tools, in particular to a composite impact screw drill tool pup joint which adopts mechanical lifting and spring energy storage. Background Art

[0002] The screw drill is an impact device powered by drilling fluid. The drilling fluid drives the drill bit through the screw motor, converting hydraulic energy into kinetic energy to achieve drilling operations. In the vertical well section, due to various factors such as complex ground stress and formation deposition, the drilling process must meet both high-speed rock breaking effects and vertical well deflection prevention technical requirements.

[0003] For example, the axial oscillating screw drill tool, which has a Chinese invention patent and authorization publication number CN 113006681 B, uses high-pressure drilling fluid as the driving medium to generate stable output torque while generating axial impact oscillation load, thereby increasing the rock-breaking energy at the drill bit and improving drilling efficiency through oscillation impact.

[0004] Although the above-mentioned existing technologies can provide axial oscillation impact on the drill bit, as the well becomes deeper, the effect of the drilling fluid is not obvious, and it is impossible to provide reliable oscillation impact. In addition, during the drilling process, the drill bit may get stuck due to reasons such as hard formations, which will cause the drill bit to become immobile, and thus seriously affect the drilling efficiency. Currently, no effective solution has been proposed to the problems in the related technologies. Summary of the Invention

[0005] In view of this, it is necessary to provide a composite impact screw drill short section that adopts mechanical lifting and spring energy storage to solve the technical problems of drill sticking and drill slipping caused by the drilling process of the drill tool in the prior art.

[0006] To achieve the above technical objectives, the technical solution of the present invention provides a composite impact screw drill sub that adopts mechanical lifting and spring energy storage, comprising an outer shell, a screw output shaft, an impact shaft, an axial impact structure and a radial impact assembly;

[0007] The screw output shaft is rotatably mounted on the inner side of the outer shell, the impact shaft is sleeved on the outer side of the screw output shaft through a spline, the axial impact structure is sleeved on the screw output shaft, and the radial impact assembly is mounted between the outer side of the impact shaft and the inner side of the outer shell, and the radial impact assembly is used to generate radial oscillation impact on the impact shaft;

[0008] The axial impact structure includes an impact column block, a rotating cylinder, a roller and a disc spring. The impact column block is sleeved on the outside of the screw output shaft. The rotating cylinder is sleeved on the outside of the screw output shaft through a spline. There are two rollers, and the rollers are circumferentially installed on the inside of the impact column block. The disc spring is sleeved on the outside of the screw output shaft. A raised inner step is provided on the inner side of the outer shell, and one end of the disc spring abuts against the inner step, and the other end abuts against the impact column block.

[0009] Two spiral inclined surfaces are circumferentially arranged on the outer side of the rotating cylinder, and the positions of the two spiral inclined surfaces correspond to the positions of the two rollers respectively.

[0010] Furthermore, the radial impact assembly includes an elastic impact structure and a rotary transmission structure. There are two elastic impact structures, and the two elastic impact structures are symmetrically distributed above and below the rotary transmission structure.

[0011] Furthermore, the rotary transmission structure includes a radial transmission body and a radial transmission block. The radial transmission block is fixedly mounted on the outside of the impact shaft. Three spiral holes are circumferentially arranged on the outside of the radial transmission block. The radial transmission body is installed on the spiral holes. Two radial transmission bodies are installed in one spiral hole, and the two radial transmission bodies are symmetrical in the upper and lower directions.

[0012] Furthermore, the elastic impact structure includes a radial impact fixing ring and three elastic impact parts. The radial impact fixing ring is fixedly installed in the outer shell, and the three elastic impact structures are circumferentially arranged on the inner side of the radial impact fixing ring; the radial transmission body is used to push the corresponding elastic impact parts to store elastic energy and generate radial impact to act on the impact shaft, and the shape of the radial transmission body is semi-cylindrical.

[0013] Furthermore, the elastic impact member includes an impact spring, a positioning shaft and a radial impact block. The impact spring is sleeved on the positioning shaft, and one end of the impact spring is fixed to the radial impact fixing ring, and the other end is fixed to the radial impact block.

[0014] Furthermore, semi-cylinders are arranged on the outside of the impact shaft in multiples of three, and there is no gap between adjacent semi-cylinders. The radial impact block includes a semi-circular structural block and a radial punch block matching the radius of the semi-cylinder. The semi-circular structural block is fixed to the radial punch block, wherein the shape of the radial punch block is circular, and the arc surface of the semi-circular structural block corresponds to the arc surface of the radial transmission body.

[0015] Furthermore, the radial impact block includes a semicircular structural block and a radial impact block matching the arc surface of the impact shaft. The shape of the radial transmission body is semi-cylindrical, the shape of the radial impact block is crescent-shaped, and the arc surface of the semicircular structural block corresponds to the arc surface of the radial transmission body.

[0016] Furthermore, the axial impact structure also includes a self-balancing weight structure, which includes a telescopic slot, a compression spring, an inverted ladder block, a counterweight ring, a guide cylinder and a push rod. The telescopic slot is opened on the inner side of the outer shell, the compression spring is installed in the telescopic slot, and the inverted ladder block is fixed to the compression spring. There are three telescopic slots, compression springs and inverted ladder blocks. The counterweight ring is placed between the tops of the three inverted ladder blocks. The guide cylinder is mounted on the outside of the disc spring, and the counterweight ring is mounted on the outside of the guide cylinder.

[0017] Furthermore, the outer shell is composed of an upper connecting shell, an upper axial impact shell, a lower axial impact shell and a lower shell, which are assembled in sequence.

[0018] Furthermore, the axial impact structure is installed in the upper axial impact shell and the lower axial impact shell, the radial impact assembly is installed in the lower shell, and the screw output shaft is rotatably connected to the upper connecting shell through the upper straightening bearing and the bearing string.

[0019] Compared with the existing technology, the present invention has the following advantages: through the axial impact structure, the drilling pressure is converted into elastic storage, and the disc spring can adapt to different geological conditions within the stroke. When the ground is hard, it can be lifted to the highest position for reciprocating impact vibration to achieve a crushing effect. By replacing the disc spring, the bit pressure is converted into elastic storage.

[0020] The size of the spring, impact column block and lifting column can achieve different stroke conditions, with a wide range of applications and obvious impact effect. Lifting is performed through this mechanical structure, which has a simple structure and reliable operation. The radial impact component generates radial oscillation impact energy to reduce the drill bit sticking phenomenon during drilling, and combined with the axial impact to form a composite impact energy to maximize the drilling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 2 is a schematic structural diagram of a composite impact screw drill sub using mechanical lifting and spring energy storage according to an embodiment of the present invention;

[0022] Figure 2 is a cross-sectional view of an impact shaft and a radial impact assembly according to an embodiment of the present invention;

[0023] Figure 3 is a three-dimensional diagram of an impact shaft and a rotary transmission structure according to an embodiment of the present invention;

[0024] Figure 4is a three-dimensional diagram of the elastic impact structure according to the first embodiment of the present invention;

[0025] Figure 5 is a top view of the elastic impact structure according to the first embodiment of the present invention;

[0026] Figure 6 is a three-dimensional diagram of an axial impact structure according to an embodiment of the present invention;

[0027] Figure 7 is a three-dimensional diagram of a rotating cylinder according to an embodiment of the present invention;

[0028] Figure 8 According to an embodiment of the present invention Figure 1 A partial enlarged view of part A;

[0029] Figure 9 is a three-dimensional diagram of the impact shaft and the rotary transmission structure according to the second embodiment of the present invention;

[0030] Figure 10 is a top view of the elastic impact structure according to the second embodiment of the present invention;

[0031] In the figure: 1. Screw output shaft; 2. Upper centering bearing; 3. Bearing string; 4. Upper connecting housing; 5. Bearing retaining ring; 6. Disc spring; 7. Impact column block; 8. Rotating column; 9. Roller; 10. Upper axial impact housing; 11. Retaining ring; 12. Lower axial impact housing; 13. Radial impact retaining ring; 14. Impact spring; 14a. Positioning shaft; 15. Radial impact block; 15a. Semicircular structural block; 15b. Radial impact block; 16. Radial transmission body; 17. Radial transmission block; 18. Lower housing; 19. Bearing bottom gasket; 20. Lower centering bearing; 21. Drill bit joint; 22. Impact shaft.

[0032] 100. Rotary transmission structure; 200. Elastic impact structure; 300. Self-balancing weight structure; 301. Telescopic slot; 302. Compression spring; 303. Inverted ladder block; 304. Counterweight ring; 305. Guide cylinder; 306. Push rod. DETAILED DESCRIPTION

[0033] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, and are not used to limit the scope of the present invention.

[0034] Example 1

[0035] like Figure 1-8As shown, the present invention provides a composite impact screw drill short section using mechanical lifting and spring energy storage, including an outer shell, a screw output shaft 1, an impact shaft 22, an axial impact structure and a radial impact assembly. The screw output shaft 1 is rotatably installed on the inner side of the outer shell, and the screw output shaft 1 can only rotate in the outer shell. The axial direction of the screw output shaft 1 is in a limited state with respect to the outer shell, and the screw output shaft 1 is connected to a screw power motor through a coupling, and is powered by the screw power motor. The impact shaft 22 is sleeved on the outer side of the screw output shaft 1 through a spline, and the impact shaft 22 transmits the rotational force through the spline while realizing the telescopic pushing movement on the outer side of the screw output shaft 1. The telescopic movement of the impact shaft 22 meets the oscillation impact requirement of the axial impact structure, and the axial impact structure is sleeved on the screw output shaft 1; in order to achieve mechanical lifting to realize a reliable axial impact effect, the axial impact structure includes an impact column block 7, a rotating column 8, a roller 9 and a disc spring 6; the impact column block 7 is sleeved on the outer side of the screw output shaft 1, and the impact The inner side of the impact column block 7 is hollow and has an opening at one end close to the impact shaft 22; the rising column 8 is arranged on the outside of the screw output shaft 1 through a spline sleeve to ensure that the torque is provided while being located on the same axis, and the rising column 8 is located on the inner side of the impact column block 7; there are two rollers 9, and the rollers 9 are circumferentially installed on the inner side of the impact column block 7, the rollers 9 are fixed to the impact column block 7, and the two rollers 9 are symmetrically distributed; the disc spring 6 is sleeved on the outer side of the screw output shaft 1, and a raised inner step, and one end of the disc spring 6 abuts against the inner step, and the other end abuts against the impact column block 7, specifically the unopened end of the impact column block 7, and the open end of the impact column block 7 abuts against the impact shaft 22; the outer side of the lifting column 8 is circumferentially provided with two spiral inclined surfaces, and the positions of the two spiral inclined surfaces correspond to the positions of the two rollers 9 respectively, and the spiral inclined surfaces are used to lift the roller 9. When the spiral inclined surface rotates, the roller 9 is lifted along the inclined surface, and falls when it is raised to the top, and it is repeated back and forth.

[0036] Specifically, when the geological conditions are soft, the disc spring 6 extends, and the stroke of the impact column block 7 is reduced, and the impact force is correspondingly reduced; when the geological conditions are hard, the drilling pressure provided by the rotary table to the drill bit cannot complete the impact smoothly. At this time, the drilling pressure is transmitted to the impact shaft 22, and the impact shaft 22 is extended and retracted through the spline and pushes the rotating column 8 to move upward, and further lifts the roller 9 with two spiral inclined surfaces distributed circumferentially on the rotating column 8, thereby prompting the impact column block 7 to squeeze the disc spring 6, and store this part of energy as elastic potential energy. When the roller 9 climbs to the top, it relies on the compression of the disc spring 6 and the weight of the impact column block 7 itself to generate a downward impact force, which has a crushing effect on the hard formation. Among them, by changing the size of the disc spring 6, the impact column block 7 and the rotating column 8 to match them, different stroke conditions can be achieved, the application range is wide, the impact effect is obvious, and the structure is a mechanical lifting structure, which is lifted by a mechanical device, has a simple structure and reliable operation, and is convenient for mass production and use.

[0037] It can be understood that the axial impact structure is used to generate axial oscillation impact on the impact shaft 22, and the radial impact component is installed between the outer side of the impact shaft 22 and the inner side of the outer shell. The radial impact component is used to generate radial oscillation impact on the impact shaft 22. Under the combined action of axial impact and radial impact, the drilling efficiency can be greatly improved.

[0038] The present embodiment further includes a radial impact assembly comprising an elastic impact structure 200 and a rotary transmission structure 100. The number of the elastic impact structures 200 is two, and the two elastic impact structures 200 are symmetrically distributed above and below the rotary transmission structure 100. The two elastic impact structures 200 are symmetrically distributed up and down, so that the transmission of the radial impact force is more uniform and sufficient. The rotary transmission structure 100 includes a radial transmission body 16 and a radial transmission block 17. The radial transmission block 17 is fixedly sleeved on the outside of the impact shaft 22. The outside of the radial transmission block 17 is circumferentially provided with three spiral holes. The radial transmission body 16 is mounted on the spiral hole. Two radial transmission bodies 16 are mounted on one spiral hole. The two radial transmission bodies 16 are symmetrical up and down. The elastic impact structure 200 includes a radial impact fixing ring 13 And three elastic impact pieces, the radial impact fixing ring 13 is fixedly installed in the outer shell, the three elastic impact pieces are circumferentially arranged on the inner side of the radial impact fixing ring 13, the position of the radial transmission body 16 corresponds to the position of the elastic impact piece, and the radial transmission block 17 is driven to rotate by the impact shaft 22, thereby driving the radial transmission body 16 to rotate, and the radial transmission body 16 during the rotation process causes interference to the elastic impact piece, mainly to the transmission of radial force, thereby forming elastic energy storage, and outputting it to the impact shaft 22 in an oscillating manner in a rebound impact manner. This is a radial oscillation impact, wherein the positions of the six radial transmission bodies 16 respectively correspond to the positions of the six elastic impact pieces, and the radial transmission body 16 is used to squeeze the corresponding elastic impact pieces to store elastic energy and generate radial impact to act on the impact shaft 22.

[0039] It can be understood that on the basis of the axial impact structure, a radial impact component is added, with the impact shaft 22 as the power source, driving the radial transmission body 16 and the radial transmission block 17 to rotate. The radial transmission body 16 with the impact shaft 22 as the rotating axis pushes the elastic impact member back and forth during the rotation process to generate radial force transmission, and the rebound after the elastic impact member stores elastic energy is utilized to achieve the purpose of generating an oscillating radial impact on the impact shaft 22, thereby reducing the occurrence of drill sticking during drilling. Combined with the axial impact, it can effectively prevent drill slippage and drill sticking, thereby improving drilling efficiency.

[0040] In order to realize the elastic energy storage of the elastic impact member, the embodiment is preferably Figure 1-5The elastic impact member includes an impact spring 14, a positioning shaft 14a and a radial impact block 15; the impact spring 14 is sleeved on the positioning shaft 14a, and one end of the impact spring 14 is fixed to the radial impact fixing ring 13, and the other end is fixed to the radial impact block 15, so that the impact spring 14 does not rotate when compressed, and generates a radial force along the positioning shaft 14a to push the radial impact block 15 toward the impact shaft 22 when compressed and rebounded; the outer side of the impact shaft 22 is provided with semi-cylinders 151 in multiples of three, and there is no gap between adjacent semi-cylinders 151, and the radial impact block 15 has a semi-circular structural block 15a and a semi-cylinder 151 that matches the radius of the semi-cylinder 151. The radial punch block 15b is circular in shape, and the semicircular structural block 15a is partially connected to a sleeve, which is sleeved on the positioning shaft 14a. The sleeve portion can be annular and can slide relative to the positioning shaft 14a. The portion of the semicircular structural block 15a away from the positioning shaft 14a is semicircular, and the shape of the radial transmission body 16 is semi-cylindrical, wherein the arc surface of the semicircular structural block 15a corresponds to the arc surface of the radial transmission body 16. Furthermore, the back of the arc surface of the semicircular structural block 15a is flat, and the back of the arc surface of the radial transmission body 16 is also flat, so that when the rotation direction is reverse, the plane can fit together to prevent the transmission of radial force.

[0041] Specifically, the three radial transmission bodies 16 are mainly driven by the rotation of the impact shaft 22 during the radial force transmission process. When the radial transmission body 16 rotates, its arc surface pushes the arc surface of the semicircular structural block 15a, thereby causing compression of the impact spring 14. After rotating away from the elastic impact member, the impact spring 14 rebounds, and the radial impact block 15 hits the semi-cylinder 151, thereby transmitting the force to the impact shaft 22, thereby generating radial impact, forming a reciprocating oscillating impact.

[0042] It can be understood that when the radial impact block 15 hits the semi-cylinder 151 on the impact shaft 22, due to the arc surface of the semi-cylinder 151, its impact force will be converted into a component force, and at the same time as the radial impact, there is a certain torsional force, making the radial impact effect more obvious.

[0043] It should be noted that the length of the radial transmission body 16 matches the reciprocating stroke of the axial oscillation of the impact shaft 22. The length of the radial transmission body 16 and the distance between it and the radial impact block 15 meet the stroke distance of the axial oscillation, so that during axial impact, the radial transmission body 16 does not interfere with the radial impact of the radial impact block 15, and can perform radial impact normally during axial impact.

[0044] In order to achieve the self-balancing function, refer to Figure 8The axial impact structure also includes a self-balancing weight structure 300, which includes a telescopic slot 301, a compression spring 302, an inverted ladder block 303, a counterweight ring 304, a guide cylinder 305 and a push rod 306. The telescopic slot 301 is opened inside the outer shell, and the compression spring 302 is installed in the telescopic slot 301. The inverted ladder block 303 is fixed to the compression spring 302. There are three telescopic slots 301, compression springs 302 and inverted ladder blocks 303, and they are circumferentially distributed in the outer shell. The counterweight ring 304 is placed between the tops of the three inverted ladder blocks 303. The guide cylinder 305 is sleeved on the outside of the disc spring 6, and the counterweight ring 304 is sleeved on the outside of the guide cylinder 305. Among them, the number of telescopic slots 301, compression springs 302, inverted ladder blocks 303, and counterweight rings 304 in the self-balancing weight structure can be adjusted according to actual conditions. In addition, the length of the guide cylinder 305 is the thickness when the disc spring 6 is compressed to the shortest. The guide cylinder 305 is mainly used to guide the counterweight ring 304. When the impact column block 7 rises, the push rod 306 is driven to move upward, thereby squeezing the inclined surface of the inverted ladder block 303, and pushing the inverted ladder block 303 into the telescopic slot 301, thereby removing the inverted ladder block 303 from the bottom of the counterweight ring 304. Under the action of its own weight, the counterweight ring 304 falls onto the impact column block 7, thereby increasing the counterweight of the impact column block 7.

[0045] It can be understood that when the impact force of the basic disc spring 6 and the impact column block 7 itself is insufficient, the disc spring 6 will be over-extruded, thereby starting the self-balancing weight structure 300 and balancing the weight ring 304 onto the impact column block 7. Furthermore, a magnetic plate is provided between the impact column block 7 and the weight ring 304, so that when the weight ring 304 falls, it can be magnetically connected to the impact column block 7.

[0046] This embodiment is optional, in order to achieve the purpose of segmented shell to facilitate segmented production, refer to Figure 1 The outer shell is composed of an upper connecting shell 4, an upper axial impact shell 10, a lower axial impact shell 12 and a lower shell 18, which are assembled in sequence. The assembly method of multiple shells is convenient for segmented molding and production assembly of the shells; the axial impact structure is installed in the upper axial impact shell 10 and the lower axial impact shell 12, and the radial impact assembly is installed in the lower shell 18. The screw output shaft 1 is rotatably connected to the upper connecting shell 4 through the upper straightening bearing 2 and the bearing string 3, wherein the upper connecting shell 4 is connected to the screw power motor shell to ensure that the device remains at the same level, and a bearing retaining ring 5 is installed between the bearing string 3 and the screw output shaft 1, and a bearing bottom gasket 19 and a lower straightening bearing 20 are installed between the end of the screw output shaft 1 close to the impact shaft 22 and the impact shaft 22, and a retaining ring 11 is installed between the impact shaft 22 and the lifting column 8 to ensure stable operation of the equipment.

[0047] This embodiment is optional. For subsequent installation of the drill bit, refer to Figure 1A drill bit joint 21 is provided at one end of the impact shaft 22 away from the outer shell, and the drill bit is installed through the drill bit joint 21.

[0048] Example 2

[0049] Based on the first embodiment, see Figure 9 and Figure 10 The shape of the radial impact block 15 on the elastic impact piece is replaced, and the semi-cylinder 151 on the impact shaft 22 is removed. Specifically, the radial impact block 15 has a semi-circular structural block 15a and a radial impact block 15b that matches the arc surface of the impact shaft 22, and the shape of the radial impact block 15b is crescent-shaped.

[0050] During use, the semicircular structural block 15a and the radial impact block 15b are pushed to move, and the crescent portion of the radial impact block 15b generates a radial impact on the impact shaft 22. During the rotation process, the three elastic impact members reciprocate continuously, thereby synchronously forming an oscillating radial impact.

[0051] In order to better understand the present invention, the following Figures 1-10 The working principle of the present invention is explained in detail: during drilling operation, it is connected to a traditional screw motor through a power joint, and the kinetic energy of the liquid is used to drive the screw motor to rotate, and the screw output shaft 1 is connected to the screw motor through a coupling, and the kinetic energy is transmitted to the impact shaft 22 through the screw output shaft 1. The impact shaft 22 and the screw output shaft 1 are spline-connected and can move axially while transmitting torque. The geological conditions encountered by the drill bit cause the impact shaft 22 to move axially. When encountering hard geology and slippery drilling, the axial impact structure at this time includes an impact column block 7, a rotating column 8, a roller 9 and a disc spring 6. The roller 9 installed on the impact column block 7 climbs on the spiral slope of the rotating column 8. When it climbs to the top, it relies on the compression of the disc spring 6 and its own weight to generate a downward impact force, which is transmitted to the impact shaft 22, and then the drill bit produces a crushing effect on the hard formation, specifically an oscillating impact; the continuous axial impact force causes the impact shaft 22 to move radially deform. At this time, the radial impact component stores energy through the impact spring 14 to achieve radial impact, and the impact force acts on the impact shaft 22, which can reduce the deformation of the impact shaft 22 caused by a single axial force, and at the same time can reduce the slippage and stuck drill bit, thereby improving the drilling efficiency. For different geological conditions, the climbing distance of the disc spring 6 and the roller 9 can be lengthened to achieve greater impact force; for different axial impact strokes, the semicircular impact transmission part of the radial transmission body 16 and the radial impact block 15 can be appropriately extended to ensure that the normal radial impact process is not affected under different strokes.

[0052] The entire workflow is complete, and all contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0053] The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or replacements that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed by the present invention should be covered by the scope of protection of the present invention.

Claims

1. A composite impact screw drill sub with mechanical lifting and spring energy storage, characterized by: It comprises an outer shell, a screw output shaft (1), an impact shaft (22), an axial impact structure and a radial impact assembly; The screw output shaft (1) is rotatably mounted on the inner side of the outer shell, the impact shaft (22) is sleeved on the outer side of the screw output shaft (1) through a spline, the axial impact structure is sleeved on the screw output shaft (1), and the radial impact assembly is mounted between the outer side of the impact shaft (22) and the inner side of the outer shell, and the radial impact assembly is used to generate radial oscillation impact on the impact shaft (22); The axial impact structure includes an impact column block (7), a rotating column (8), a roller (9) and a disc spring (6), wherein the impact column block (7) is sleeved on the outside of the screw output shaft (1), the rotating column (8) is sleeved on the outside of the screw output shaft (1) through a spline, the number of the rollers (9) is two, and the rollers (9) are circumferentially installed on the inside of the impact column block (7), the disc spring (6) is sleeved on the outside of the screw output shaft (1), the inner side of the outer shell is provided with a raised inner step, and one end of the disc spring (6) abuts against the inner step, and the other end abuts against the impact column block (7); Two spiral bevels are circumferentially arranged on the outer side of the rotating column (8), and the positions of the two spiral bevels correspond to the positions of the two rollers (9) respectively; The radial impact assembly comprises an elastic impact structure (200) and a rotary transmission structure (100), wherein the number of the elastic impact structures (200) is two, and the two elastic impact structures (200) are symmetrically distributed above and below the rotary transmission structure (100); The rotary transmission structure (100) comprises a radial transmission body (16) and a radial transmission block (17), wherein the radial transmission block (17) is fixedly sleeved on the outside of the impact shaft (22), and three spiral holes are circumferentially arranged on the outside of the radial transmission block (17), and the radial transmission body (16) is mounted on the spiral holes, and two radial transmission bodies (16) are mounted in one spiral hole, and the two radial transmission bodies (16) are symmetrical in the vertical direction; Semi-cylinders (151) are arranged on the outside of the impact shaft (22) in multiples of three, and there is no interval between adjacent semi-cylinders (151). The radial impact block (15) includes a semi-circular structural block (15a) and a radial impact block (15b) matching the radius of the semi-cylinder (151). The radial impact block (15b) is circular in shape, and the arc surface of the semi-circular structural block (15a) corresponds to the arc surface of the radial transmission body (16).

2. The composite impact screw drill sub with mechanical lifting and spring energy storage according to claim 1 is characterized in that: The elastic impact structure (200) comprises a radial impact fixing ring (13) and three elastic impact pieces, wherein the radial impact fixing ring (13) is fixedly mounted in the outer shell, and the three elastic impact structures are circumferentially arranged on the inner side of the radial impact fixing ring (13); the radial transmission body (16) is used to squeeze and push the corresponding elastic impact pieces to store elastic energy and generate radial impact to act on the impact shaft (22), and the radial transmission body (16) is semi-cylindrical in shape.

3. The composite impact screw drill sub with mechanical lifting and spring energy storage according to claim 2 is characterized in that: The elastic impact member comprises an impact spring (14), a positioning shaft (14a) and a radial impact block (15); the impact spring (14) is sleeved on the positioning shaft (14a), and one end of the impact spring (14) is fixed to the radial impact fixing ring (13), and the other end is fixed to the radial impact block (15).

4. The composite impact screw drill sub with mechanical lifting and spring energy storage according to claim 3 is characterized in that: The radial impact block (15) comprises a semicircular structural block (15a) and a radial impact block (15b) matching the arc surface of the impact shaft (22); the radial impact block (15b) is crescent-shaped, and the arc surface of the semicircular structural block (15a) corresponds to the arc surface of the radial transmission body (16).

5. The composite impact screw drill sub with mechanical lifting and spring energy storage according to claim 1 is characterized in that: The axial impact structure further includes a self-balancing weight structure (300), which includes a telescopic slot (301), a compression spring (302), a ladder block (303), a balancing weight ring (304), a guide cylinder (305) and a push rod (306). The telescopic slot (301) is opened on the inner side of the outer shell, the compression spring (302) is installed in the telescopic slot (301), and the ladder block (303) is fixed to the compression spring (302). There are three telescopic slots (301), compression springs (302) and ladder blocks (303). The balancing weight ring (304) is placed between the tops of the three ladder blocks (303). The guide cylinder (305) is sleeved on the outside of the disc spring (6), and the balancing weight ring (304) is sleeved on the outside of the guide cylinder (305).

6. The composite impact screw drill sub with mechanical lifting and spring energy storage according to claim 1 is characterized in that: The outer shell is composed of an upper connecting shell (4), an upper axial impact shell (10), a lower axial impact shell (12), and a lower shell (18), which are assembled in sequence.

7. The composite impact screw drill sub with mechanical lifting and spring energy storage according to claim 6 is characterized in that: The axial impact structure is installed in the upper axial impact shell (10) and the lower axial impact shell (12), the radial impact assembly is installed in the lower shell (18), and the screw output shaft (1) is rotatably connected to the upper connecting shell (4) through an upper straightening bearing (2) and a bearing string (3).

Images