Shock absorption well drilling structure for underground construction

Abstract

The invention discloses a shock absorption well drilling structure for underground construction, and belongs to the technical field of well drilling equipment, the shock absorption well drilling structure comprises a regulation and control assembly, a drill bit is arranged at the bottom of the regulation and control assembly, a spring buffer assembly is connected between the regulation and control assembly and the drill bit, a damping structure is arranged in an inner cavity of the spring buffer assembly, and the two ends of the damping structure are connected with the regulation and control assembly and the spring buffer assembly respectively. By designing the regulation and control assembly, the spring buffering assembly and the damping structure, corresponding adjustment can be automatically made through the regulation and control assembly when the rotating speeds of the drill bit are different, so that the spring elasticity and the damping coefficient of the spring buffering assembly and the damping structure are automatically changed when the rotating speeds are different; therefore, when the amplitude is different due to different rotating speeds, buffering can be effectively carried out, and the device is particularly suitable for being used in the drilling construction environment where the rotating speed needs to be increased frequently.

Description

Technical Field

[0001] The present invention belongs to the technical field of drilling equipment, and particularly relates to a shock-absorbing drilling structure for downhole construction. Background Art

[0002] The drilling structure, as an important part of oil and gas exploration and development, refers to the combination of drilling equipment and pipe strings used in the drilling process. These equipment and pipe strings are combined in a certain order and manner to complete the drilling and well completion operations of the well. The downhole drill rig, as a type of drilling equipment, is an indispensable key equipment in the drilling process. During the drilling construction process of the drill rig, the drill bit will vibrate due to rotation, so a corresponding shock-absorbing structure is required for shock absorption and buffering.

[0003] The Chinese utility model patent with the publication number CN213928247U discloses a shock-absorbing drill bit and records a shock-absorbing structure. The above shock-absorbing structure usually has a fixed damping coefficient and buffer elasticity. During downhole construction, it is usually necessary to change the rotation speed of the drill bit for different terrains. The faster the rotation speed, the greater the amplitude and vibration usually are. The shock-absorbing structure with a single fixed damping coefficient is difficult to effectively absorb vibration and decelerate at high speed and high amplitude. That is, the prior art has the following technical problems: the fixed damping coefficient of the ordinary shock-absorbing structure is difficult to effectively absorb vibration and decelerate when the speed and amplitude change. Therefore, a shock-absorbing drilling structure for downhole construction is proposed to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a shock-absorbing drilling structure for downhole construction, which solves the technical problem that the fixed damping coefficient of the ordinary shock-absorbing structure in the prior art is difficult to effectively absorb vibration and decelerate when the speed and amplitude change.

[0005] The technical solution adopted by the present invention is that the shock-absorbing drilling structure for downhole construction includes a regulation component. A drill bit is provided at the bottom of the regulation component. A spring buffer component is connected between the regulation component and the drill bit. A damping structure is arranged in the inner cavity of the spring buffer component, and both ends of the damping structure are respectively connected to the regulation component and the spring buffer component.

[0006] The characteristics of the present invention also lie in that: The regulation component includes a circular fixed seat with an open top. A fixed circular cover is installed at the opening of the circular fixed seat, and a power input shaft is fixedly arranged at the central position of the fixed circular cover.

[0007] An inner cavity is arranged inside the circular fixed seat. A central shaft is fixedly connected to the central position of the inner cavity of the circular fixed seat. A plurality of eccentric weights are rotatably connected to the side wall of the central shaft at equal intervals; A number of fixed plates are fixedly arranged on the inner cavity wall of the circular fixed seat. The number of fixed plates corresponds one by one to the number of eccentric flywheels. A fixed cylinder is fixedly connected to the side wall of the fixed plate. A moving piston is slidably connected in the inner cavity of the fixed cylinder. One end of the moving piston is fixedly connected to one end of a push rod. The other end of the push rod penetrates through the side wall of the inner cavity of the fixed cylinder and extends outside the wall. A connecting circular plate is fixedly arranged at one end of the push rod. The connecting circular plate contacts the side wall of the eccentric flywheel. One end of a return spring is fixedly connected to the other side wall of the connecting circular plate. The other end of the return spring extends to the side wall of the fixed cylinder and is fixedly connected to the fixed cylinder. A delivery hose is fixedly connected in the inner cavity of the fixed cylinder.

[0008] The spring buffer assembly includes a fixed circular plate A fixedly arranged at the center position of the bottom surface of the circular fixed seat. A number of moving parts are fixedly arranged at the bottom edge of the bottom surface of the fixed circular plate A. The bottom ends of the number of moving parts are fixedly connected to a moving circular plate. One end of a buffer spring is connected to the bottom surface of the moving circular plate. The other end of the buffer spring is fixedly connected to a fixed circular plate B.

[0009] The moving circular plate includes a moving plate A. A circular hole is arranged at the center of the moving plate A. Grooves are arranged on both sides of the circular hole.

[0010] The moving part includes a cylinder, a piston and a moving column. The cylinder is fixedly arranged at the bottom surface of the fixed circular plate A. A piston is slidably connected in the inner cavity of the cylinder. One end of the moving column is fixedly connected to the bottom surface of the piston. The other end of the moving column extends to the upper surface of the moving circular plate and is fixedly connected to the moving circular plate. One end of the delivery hose extends to the upper side of the inner cavity of the cylinder and is fixedly connected to the cylinder.

[0011] The damping structure includes a sealed cylinder body. The sealed cylinder body is fixedly arranged at the center position of the bottom surface of the fixed circular plate A. A damping piston is slidably arranged in the inner cavity of the sealed cylinder body. One end of a guide rod is fixedly connected to the bottom end of the damping piston. The other end of the guide rod extends outside the inner cavity wall of the sealed cylinder body. The bottom end of the guide rod is fixedly connected to the center of the fixed circular plate B. The inner cavity of the sealed cylinder body is filled with a fluid damping material.

[0012] The fluid damping material is silicone oil. Damping holes are arranged on both sides of the damping piston.

[0013] Rectangular grooves are arranged on both sides of the sealed cylinder body. An extrusion sliding plate is slidably arranged inside the rectangular groove. The extrusion sliding plate is a plate-shaped slider structure with a smaller upper end and a larger lower end. A moving plate B is slidably connected inside the rectangular groove. A number of pressurizing springs are fixedly arranged between the moving plate B and the extrusion sliding plate. One end of a connecting rod is fixedly connected to the other side wall of the moving plate B. The other end of the connecting rod extends into the inner cavity of the sealed cylinder body. A damping plate is fixedly connected to one end of the connecting rod. The damping plate extends to the damping hole. The extrusion sliding plate is arranged in the groove.

[0014] A limit buffer part is also arranged between the control component and the spring buffer component. The limit buffer part includes a plurality of connecting seats, and the plurality of connecting seats are fixedly arranged at equal intervals on the arc-shaped wall of the fixed circular plate B. A fixed sleeve rod is fixedly connected to the upper surface of the connecting seat. A moving rod is slidably connected to the fixed sleeve rod. The top end of the moving rod is fixedly connected to the bottom surface of the circular fixed seat. One end of a secondary buffer spring is fixedly connected to the upper surface of the connecting seat, and the other end of the secondary buffer spring is fixedly connected to the top end of the moving rod.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: In order to solve the problem in the prior art that ordinary drilling shock absorption structures usually only have a single damping coefficient and a fixed buffer spring elasticity, and when the drill bit speed changes, they cannot effectively buffer the different amplitudes caused by different high and low speeds. The present invention designs a control component, a spring buffer component and a damping structure. Through the control component, corresponding adjustments can be automatically made when the drill bit speed is different, so that the spring buffer component and the damping structure automatically change their own spring elasticity and damping coefficient when the speed is different, so that they can effectively buffer when the amplitudes are different due to different speeds, and it is especially suitable for use in drilling construction environments that often require increased speeds. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of the shock absorption drilling structure for downhole construction of the present invention; Figure 2 is a schematic connection structure diagram of the control component in the shock absorption drilling structure for downhole construction of the present invention; Figure 3 is a schematic internal structure diagram of the control component in the shock absorption drilling structure for downhole construction of the present invention; Figure 4 is a schematic internal structure diagram of the fixed cylinder in the shock absorption drilling structure for downhole construction of the present invention; Figure 5 is a schematic structural diagram of the spring buffer component in the shock absorption drilling structure for downhole construction of the present invention; Figure 6 is a schematic internal structure diagram of the moving part in the shock absorption drilling structure for downhole construction of the present invention; Figure 7 is a schematic structural diagram of the moving circular plate in the shock absorption drilling structure for downhole construction of the present invention; Figure 8 is a schematic connection structure diagram of the damping structure in the shock absorption drilling structure for downhole construction of the present invention; Figure 9 is a schematic internal structure diagram of the damping structure in the shock absorption drilling structure for downhole construction of the present invention; Figure 10It is a schematic structural diagram of a damping hole in the shock-absorbing drilling structure for downhole construction of the present invention; Figure 11 It is a schematic structural diagram of a limit buffer part in the shock-absorbing drilling structure for downhole construction of the present invention.

[0017] In the figure: 1. Regulation component, 101. Circular fixed seat, 102. Fixed circular cover, 103. Power input shaft, 104. Central shaft, 105. Eccentric flyweight, 106. Fixed plate, 107. Fixed cylinder, 108. Moving piston, 109. Push rod, 110. Connecting circular plate, 111. Return spring, 112. Delivery hose, 2. Spring buffer component, 201. Fixed circular plate A, 202. Moving part, 2021. Cylinder, 2022. Piston, 2023. Moving column, 203. Moving circular plate, 2031. Moving plate A, 2032. Round hole, 2033. Groove, 204. Buffer spring, 205. Fixed circular plate B, 3. Damping structure, 301. Sealing cylinder body, 302. Rectangular groove, 303. Extrusion sliding plate, 304. Moving plate B, 305. Boosting spring, 306. Connecting rod, 307. Damping plate, 308. Damping piston, 3081. Damping hole, 309. Guide rod, 310. Fluid damping material, 4. Limit buffer part, 401. Fixed sleeve rod, 402. Moving rod, 403. Auxiliary buffer spring, 404. Connecting seat, 5. Drill bit. Detailed implementation manners

[0018] In order to enable those skilled in the art to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0019] It should be noted that the terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of this application described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0020] In this application, the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. is based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe this application and its embodiments, and are not used to limit that the indicated devices, elements or components must have a specific orientation, or be constructed and operated in a specific orientation.

[0021] Moreover, in addition to being used to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0022] In addition, the terms "installed", "set", "provided with", "connected", "connected to", "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there is an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0023] Embodiment 1 The shock-absorbing drilling structure for downhole construction disclosed in this embodiment, as Figure 1 shown, includes a regulation component 1. A drill bit 5 is provided at the bottom of the regulation component 1. A spring buffer component 2 is connected between the regulation component 1 and the drill bit 5. A damping structure 3 is provided in the inner cavity of the spring buffer component 2. Both ends of the damping structure 3 are respectively connected to the regulation component 1 and the spring buffer component 2.

[0024] In this embodiment, the regulation component 1 can automatically adjust the elastic force of the spring buffer component 2 when the rotation speed changes; the damping structure 3 can automatically adjust the damping when the rotation speed changes; through the regulation component 1, corresponding adjustments can be made automatically when the rotation speed of the drill bit is different, so that the spring buffer component 2 and the damping structure 3 automatically change their spring elastic forces and damping coefficients when the rotation speeds are different, so that effective buffering can be carried out when the amplitudes are different due to different rotation speeds, and it is particularly suitable for use in a drilling construction environment where the rotation speed needs to be frequently increased.

[0025] Embodiment 2 On the basis of Embodiment 1, as Figure 2 shown, in this embodiment, the regulation component 1 includes a circular fixed seat 101 with an open top. A fixed circular cover 102 is installed at the opening of the circular fixed seat 101. A power input shaft 103 is fixedly arranged at the central position of the fixed circular cover 102; In this embodiment, before using this technical solution, the power input shaft 103 is connected to the power shaft of the power device. The power device drives the control component 1 to rotate, thereby driving the drill bit 5 to rotate and realizing the drilling function of the drill bit 5. Further, as Figure 3 and Figure 4 shown, the inside of the circular fixed seat 101 is provided with an inner cavity. At the central position of the inner cavity of the circular fixed seat 101, a central shaft 104 is fixedly connected. A number of eccentric weights 105 are rotatably connected to the side wall of the central shaft 104 at equal intervals. A number of fixing plates 106 are fixedly arranged on the inner cavity wall of the circular fixed seat 101. The number of fixing plates 106 corresponds to the number of eccentric weights 105 one by one. A fixed cylinder 107 is fixedly connected to the side wall of the fixing plate 106. A moving piston 108 is slidably connected in the inner cavity of the fixed cylinder 107. One end of the moving piston 108 is fixedly connected to one end of a push rod 109. The other end of the push rod 109 penetrates through the side wall of the inner cavity of the fixed cylinder 107 and extends outside the wall. A connecting circular plate 110 is fixedly arranged at one end of the push rod 109. The connecting circular plate 110 contacts the side wall of the eccentric weight 105. One end of a return spring 111 is fixedly connected to the other side wall of the connecting circular plate 110. The other end of the return spring 111 extends to the side wall of the fixed cylinder 107 and is fixedly connected to the fixed cylinder 107. A delivery hose 112 is fixedly connected in the inner cavity of the fixed cylinder 107.

[0026] In this embodiment, when the control component 1 rotates, the rotation of the circular fixed seat 101 causes the eccentric weight 105 to deflect due to its own centrifugal force. At the same time, as the rotational speed increases, the deflection distance of the eccentric weight 105 becomes farther. Thus, the deflection of the eccentric weight 105 pushes the connecting circular plate 110 to move. Furthermore, the movement of the connecting circular plate 110 can push the push rod 109 to move, thereby driving the moving piston 108 to move left. When the rotational speed decreases, the elastic force of the return spring 111 is released, causing the connecting circular plate 110 to move back to its original position, making the push rod 109 move to the right, and thus making the moving piston 108 move to the right in the inner cavity of the fixed cylinder 107.

[0027] Embodiment 3 Based on Embodiment 2, as Figure 5 shown, the spring buffer assembly 2 disclosed in this embodiment includes a fixed circular plate A 201 fixedly arranged at the central position of the bottom surface of the circular fixed seat 101. A number of moving parts 202 are fixedly arranged at the bottom edge of the fixed circular plate A 201. A moving circular plate 203 is fixedly connected to the bottom ends of the number of moving parts 202. One end of a buffer spring 204 is connected to the bottom surface of the moving circular plate 203. The other end of the buffer spring 204 is fixedly connected to a fixed circular plate B 205.

[0028] In this embodiment, the deformable amount of the buffer spring 204 is much larger than the amplitude that can be generated during the normal operation of the device. Through the arrangement of the buffer spring 204, this technical solution can play a role in buffering vibration during drilling.

[0029] Through this technical solution, when the rotational speed increases, since the deflection distance of the eccentric flyweight 105 increases, the push rod 109 is pushed to move, and then the moving piston 108 is pushed to move. Since the moving piston 108 moves leftward in the inner cavity of the fixed cylinder 107, the gas in the inner cavity of the fixed cylinder 107 can be pushed through the delivery hose 112 into the inner cavity of the cylinder 2021. Since the gas in the inner cavity of the cylinder 2021 increases, the piston 2022 can be pushed to move downward. The downward movement of the piston 2022 can drive the moving column 2023 to move downward, thereby pushing the moving circular plate 203 to move downward. Through the downward movement of the moving circular plate 203, the buffer spring 204 can be compressed, so that the buffer spring 204 generates a greater pre-tightening force, increasing the elastic force of the buffer spring 204. Thus, during high-speed drilling, the elastic force of the buffer spring 204 can be automatically increased, so that the buffer spring 204 can have a greater elastic force at the high amplitude of high-speed drilling to ensure the safety and stability of the device, achieving a better buffering effect. When the rotational speed decreases, the moving piston 108 moves back due to the return spring 111, so that the gas in the inner cavity of the cylinder 2021 is sucked into the inner cavity of the fixed cylinder 107 through the delivery hose 112. Then, the piston 2022 moves upward, driving the moving column 2023 to move upward, and then driving the moving circular plate 203 to move upward and reset, reducing the pre-tightening force of the buffer spring 204, so that the buffer spring 204 returns to the relaxed state, thereby buffering the low-amplitude vibration at low rotational speed in the state of small elastic force. From the above description, it can be seen that this application can automatically change the buffering elastic force of the buffer spring 204 under different rotational speed conditions, so that the elastic force of the buffer spring 204 can be automatically increased for buffering during high-speed drilling, achieving an adaptive function.

[0030] Further, as Figure 7 shown, the moving circular plate 203 includes a moving plate 2031A. A circular hole 2032 is provided at the center of the moving plate A2031, and grooves 2033 are provided on both sides of the circular hole 2032.

[0031] In this embodiment, the circular hole 2032 provides a passing channel for the sealing cylinder 301 of the damping structure 3; the grooves 2033 provide a working space for the extrusion slide plate 303 of the damping structure 3, so that when the moving circular plate 203 moves up and down, the extrusion slide plate 303 can be extruded through the grooves 2033, triggering the damping coefficient adjustment mechanism to realize the linkage control of spring buffering and damping adjustment.

[0032] Further, asFigure 6 As shown, the moving part 202 includes a cylinder 2021, a piston 2022, and a moving column 2023. The cylinder 2021 is fixedly arranged at the bottom surface of the fixed circular plate A201. A piston 2022 is slidably connected in the inner cavity of the cylinder 2021. One end of a moving column 2023 is fixedly connected to the bottom surface of the piston 2022. The other end of the moving column 2023 extends to the upper surface of the moving circular plate 203 and is fixedly connected thereto. One end of the conveying hose 112 extends to the upper side of the inner cavity of the cylinder 2021 and is fixedly connected to the cylinder 2021.

[0033] In this embodiment, the gas pressure introduced by the conveying hose 112 acts on the piston 2022, pushing the moving column 2023 to drive the moving circular plate 203 to move downward and compress the buffer spring 204. When the gas pressure decreases, the piston 2022 moves upward and resets under the elastic force of the buffer spring 204, realizing the closed-loop control of "gas pressure change - piston displacement - spring pre-tightening force adjustment".

[0034] Embodiment 4 On the basis of Embodiment 3, as Figure 8 shown, the damping structure 3 disclosed in this embodiment includes a sealed cylinder body 301. The sealed cylinder body 301 is fixedly arranged at the central position of the bottom surface of the fixed circular plate A201. A damping piston 308 is slidably arranged in the inner cavity of the sealed cylinder body 301. One end of a guide rod 309 is fixedly connected to the bottom end of the damping piston 308. The other end of the guide rod 309 extends outside the inner cavity wall of the sealed cylinder body 301. The bottom end of the guide rod 309 is fixedly connected to the center of the fixed circular plate B205. The inner cavity of the sealed cylinder body 301 is filled with a fluid damping material 310.

[0035] In this embodiment, through this technical solution, when the drill bit vibrates and pushes the guide rod 309 to move, the movement of the guide rod 309 can push the damping piston 308 to move relatively in the inner cavity of the sealed cylinder body 301. Due to the pressure difference before and after the damping piston 308, silicone oil passes through the damping holes 3081, thereby generating a damping force, and dissipating the vibration energy through the viscous dissipation of the damping material in the damper. Further, as Figure 10 shown, the fluid damping material 310 is silicone oil, and damping holes 3081 are arranged on both sides of the damping piston 308.

[0036] In this embodiment, when the silicone oil passes through the damping holes 3081, a throttling effect is generated. As a high-viscosity fluid, the stable viscous characteristics of the silicone oil ensure the continuity and reliability of the damping force, adapting to the complex vibration environment underground.

[0037] Embodiment 5 On the basis of Embodiment 4, as Figure 9As shown in the figure, rectangular grooves 302 are provided on both sides of the sealed cylinder block 301 disclosed in this embodiment. An extrusion slide plate 303 is slidably arranged inside the rectangular groove 302. The extrusion slide plate 303 is a plate-shaped slider structure with a smaller upper end and a larger lower end. A moving plate B 304 is slidably connected inside the rectangular groove 302. A number of booster springs 305 are fixedly arranged between the moving plate B 304 and the extrusion slide plate 303. One end of a connecting rod 306 is fixedly connected to the other side wall of the moving plate B 304. The other end of the connecting rod 306 extends into the inner cavity of the sealed cylinder block 301. A damping plate 307 is fixedly connected to one end of the connecting rod 306. The damping plate 307 extends to the damping hole 3081. The extrusion slide plate 303 is arranged at the groove 2033.

[0038] In this embodiment, through this technical solution, when the rotation speed of the drilling equipment increases, due to the increased deflection distance of the eccentric weight 105, the moving piston 108 moves in the inner cavity of the fixed cylinder 107, thereby pushing the piston 2022 downward, driving the moving column 2023 to move, causing the moving column 2023 to push the moving circular plate 203 to move. Then, through the downward movement of the moving circular plate 203, the extrusion slide plate 303 is continuously extruded, causing the extrusion slide plate 303 to move inward. By the inward movement of the extrusion slide plate 303, the booster spring 305 is extruded, causing the booster spring 305 to compress and generate elastic force. Thus, the elastic force generated by the compression of the booster spring 305 is applied to the moving plate B 304, and then transmitted to the damping plate 307 through the connecting rod 306, causing the damping plate 307 to press tightly against the damping piston 308, further increasing the damping. The greater the downward movement distance of the moving circular plate 203, the greater the inward movement distance of the extrusion slide plate 303, thus compressing the booster spring 305 more, generating a greater elastic force, and causing the force of the damping plate 307 pressing tightly against the damping piston 308 to be greater, and further providing a greater damping. Through this technical solution, the damping can be automatically increased when the equipment rotation speed increases, and thus the high vibration generated during high-speed drilling can be effectively damped and shock-absorbed, playing an automatic adjustment and adaptation function.

[0039] Embodiment 6 Based on Embodiment 3, as Figure 11 shown in the figure, a limit buffer part 4 is further arranged between the regulation component 1 and the spring buffer component 2 disclosed in this embodiment. The limit buffer part 4 includes a number of connecting seats 404. The number of connecting seats 404 are fixedly arranged at equal intervals on the arc-shaped wall of the fixed circular plate B 205. A fixed sleeve rod 401 is fixedly connected to the upper surface of the connecting seat 404. A moving rod 402 is slidably connected to the fixed sleeve rod 401. The top end of the moving rod 402 is fixedly connected to the bottom surface of the circular fixed seat 101. One end of a secondary buffer spring 403 is fixedly connected to the upper surface of the connecting seat 404. The other end of the secondary buffer spring 403 is fixedly connected to the top end of the moving rod 402.

[0040] In this embodiment, the setting of the limit buffer portion 4 can play a role in limiting, and at the same time, the setting of the auxiliary buffer spring 403 can play a buffering function. The radial displacement of the fixed circular plate B205 is restricted by the sliding fit, avoiding the deviation of the drill bit 5 during the vibration process and ensuring the accuracy of the drilling direction. An additional elastic buffer force is provided outside the spring buffer assembly 2 to share the vibration load. At the same time, the energy is absorbed through the deformation of the spring, further reducing the vibration amplitude of the whole machine and extending the service life of the equipment.

[0041] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A shock-absorbing drilling structure for downhole construction, characterized in that, It includes a regulation component (1). A drill bit (5) is provided at the bottom of the regulation component (1). A spring buffer component (2) is connected between the regulation component (1) and the drill bit (5). A damping structure (3) is provided in the inner cavity of the spring buffer component (2). The two ends of the damping structure (3) are respectively connected to the regulation component (1) and the spring buffer component (2).

2. The shock-absorbing drilling structure for downhole construction according to claim 1, characterized in that, The regulation component (1) includes a circular fixed seat (101) with an open top. A fixed circular cover (102) is installed at the opening of the circular fixed seat (101). A power input shaft (103) is fixedly arranged at the center position of the fixed circular cover (102).

3. The shock-absorbing drilling structure for downhole construction according to claim 2, wherein, An inner cavity is provided inside the circular fixed seat (101). A central shaft (104) is fixedly connected to the center position of the inner cavity of the circular fixed seat (101). A number of eccentric weights (105) are rotatably connected to the side wall of the central shaft (104) at equal intervals; A number of fixed plates (106) are fixedly arranged on the inner cavity wall of the circular fixed seat (101). The number of fixed plates (106) corresponds one by one to the number of eccentric weights (105). A fixed cylinder (107) is fixedly connected to the side wall of the fixed plate (106). A moving piston (108) is slidably connected in the inner cavity of the fixed cylinder (107). One end of the moving piston (108) is fixedly connected to one end of a push rod (109). The other end of the push rod (109) penetrates through the side wall of the inner cavity of the fixed cylinder (107) and extends outside the wall. A connecting circular plate (110) is fixedly arranged at one end of the push rod (109). The connecting circular plate (110) contacts the side wall of the eccentric weight (105). One end of a return spring (111) is fixedly connected to the other side wall of the connecting circular plate (110). The other end of the return spring (111) extends to the side wall of the fixed cylinder (107) and is fixedly connected to the fixed cylinder (107). A delivery hose (112) is fixedly connected in the inner cavity of the fixed cylinder (107).

4. The shock-absorbing drilling structure for downhole construction according to claim 3, characterized in that, The spring buffer component (2) includes a fixed circular plate A (201) fixedly arranged at the center position of the bottom surface of the circular fixed seat (101). A number of moving parts (202) are fixedly arranged at the bottom edge of the fixed circular plate A (201). The bottom ends of the number of moving parts (202) are fixedly connected to a moving circular plate (203). One end of a buffer spring (204) is connected to the bottom surface of the moving circular plate (203). The other end of the buffer spring (204) is fixedly connected to a fixed circular plate B (205).

5. The shock-absorbing drilling structure for downhole construction according to claim 4, characterized in that, The moving circular plate (203) includes a moving plate A (2031). A circular hole (2032) is provided at the center of the moving plate A (2031). Grooves (2033) are provided on both sides of the circular hole (2032).

6. The shock-absorbing drilling structure for downhole construction according to claim 4, characterized in that, The moving part (202) includes a cylinder (2021), a piston (2022) and a moving column (2023). The cylinder (2021) is fixedly arranged at the bottom surface of the fixed circular plate A (201). A piston (2022) is slidably connected in the inner cavity of the cylinder (2021). One end of a moving column (2023) is fixedly connected to the bottom surface of the piston (2022). The other end of the moving column (2023) extends to the upper surface of the moving circular plate (203) and is fixedly connected to the moving circular plate (203). One end of a conveying hose (112) extends to the upper side of the inner cavity of the cylinder (2021) and is fixedly connected to the cylinder (2021).

7. The shock-absorbing drilling structure for downhole construction according to claim 4, characterized in that, The damping structure (3) includes a sealing cylinder body (301). The sealing cylinder body (301) is fixedly arranged at the central position of the bottom surface of the fixed circular plate A (201). A damping piston (308) is slidably arranged in the inner cavity of the sealing cylinder body (301). One end of a guide rod (309) is fixedly connected to the bottom end of the damping piston (308). The other end of the guide rod (309) extends outside the inner cavity wall of the sealing cylinder body (301). The bottom end of the guide rod (309) is fixedly connected to the center of the fixed circular plate B (205). The inner cavity of the sealing cylinder body (301) is filled with a fluid damping material (310).

8. The shock-absorbing drilling structure for downhole construction according to claim 7, wherein, The fluid damping material (310) is silicone oil. Damping holes (3081) are arranged on both sides of the damping piston (308).

9. The shock-absorbing drilling structure for downhole construction according to claim 7, wherein, Rectangular grooves (302) are arranged on both sides of the sealing cylinder body (301). An extrusion slide plate (303) is slidably arranged inside the rectangular groove (302). The extrusion slide plate (303) is a plate-shaped slider structure with a smaller upper end and a larger lower end. A moving plate B (304) is slidably connected inside the rectangular groove (302). A number of pressurizing springs (305) are fixedly arranged between the moving plate B (304) and the extrusion slide plate (303). One end of a connecting rod (306) is fixedly connected to the other side wall of the moving plate B (304). The other end of the connecting rod (306) extends into the inner cavity of the sealing cylinder body (301). A damping plate (307) is fixedly connected to one end of the connecting rod (306). The damping plate (307) extends to the damping hole (3081). The extrusion slide plate (303) is arranged at the groove (2033).

10. The shock-absorbing drilling structure for downhole construction according to claim 4, wherein, A limit buffer part (4) is further arranged between the control component (1) and the spring buffer component (2). The limit buffer part (4) includes a plurality of connecting seats (404). The plurality of connecting seats (404) are fixedly arranged at equal intervals on the arc-shaped wall of the fixed circular plate B (205). A fixed sleeve rod (401) is fixedly connected to the upper surface of the connecting seat (404). A moving rod (402) is slidably connected to the fixed sleeve rod (401). The top end of the moving rod (402) is fixedly connected to the bottom surface of the circular fixed seat (101). One end of a secondary buffer spring (403) is fixedly connected to the upper surface of the connecting seat (404), and the other end of the secondary buffer spring (403) is fixedly connected to the top end of the moving rod (402).

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