Downhole multifunctional energy coordinated regulation drilling speed increasing tool and method

Abstract

The invention discloses an underground multifunctional drilling speed-increasing tool and method with energy coordinated regulation and control, and belongs to the technical field of drilling engineering. The underground multifunctional drilling speed-increasing tool comprises an upper connector, a depressurization barrel, a mandrel and a main drill bit; the core shaft comprises an upper core shaft and a lower core shaft, the upper core shaft is located in the pressure reducing cylinder, and the outer wall surface of the upper core shaft can axially slide or radially rotate relative to the inner wall surface of the pressure reducing cylinder; the main drill is arranged at the bottom end of the lower mandrel; an elastic reset piece is arranged at the top of the upper mandrel; the bottom end of the depressurization cylinder is provided with an upper torque transmission mechanism, and the top end of the lower mandrel is provided with a lower torque transmission mechanism. Through the connection relation between the upper core shaft and the pressure reduction barrel, the arrangement of the elastic reset piece and the matching relation between the upper torque transmission mechanism and the lower torque transmission mechanism, when the pressure reduction barrel vibrates downwards, the axial force of downward vibration of the pressure reduction barrel is converted into torsional force, additional torsional impact force is applied to a main drill bit, and rock breaking is accelerated; when the pressure reduction cylinder vibrates upwards, the mandrel and the main drill bit do not vibrate upwards along with the pressure reduction cylinder, and therefore the underground vibration absorption effect is achieved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of drilling engineering, and particularly relates to a downhole multifunctional energy collaborative regulation drilling speed increasing tool and method. BACKGROUND

[0002] The oil and gas drilling process is a process in which the drill bit continuously breaks rocks, the bottom hole jet continuously removes cuttings, and the annular drilling fluid continuously carries rocks, so that the well depth is continuously increased. However, as the drilling depth is continuously increased, the formation conditions drilled are increasingly complex, and in particular, the drill string vibration problem is very prominent during the actual drilling process of a ten-thousand-meter deep well. Frequent and intense vibration causes drill bit fatigue damage and high drilling cost, and therefore, how to reduce the vibration of the drill bit and improve the drilling speed becomes a problem that cannot be ignored.

[0003] Based on this, the present application provides a downhole multifunctional energy collaborative regulation drilling speed increasing tool and method. Through the axial movement and radial rotation connection relationship between the upper mandrel and the pressure reduction cylinder, the setting of the elastic return member, and the cooperation relationship between the upper torque transmission mechanism and the lower torque transmission mechanism, when the pressure reduction cylinder vibrates downward, the axial force of the downward vibration of the pressure reduction cylinder is converted into a torsional force for promoting the rotation of the mandrel and the drill bit relative to the pressure reduction cylinder, that is, an additional torsional impact force is applied to the drill bit to accelerate rock breaking. When the pressure reduction cylinder vibrates upward, the mandrel and the drill bit do not follow the upward vibration, and therefore, the effect of downhole vibration absorption is achieved. SUMMARY

[0004] The purpose of the present application is to overcome the shortcomings of the prior art and provide a downhole multifunctional energy collaborative regulation drilling speed increasing tool.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solutions: A downhole multifunctional energy collaborative regulation drilling speed increasing tool, comprising an upper joint, a pressure reduction cylinder, a mandrel and a main drill bit which are coaxially connected in sequence. The upper joint is coaxially fixedly connected with the pressure reduction cylinder. The mandrel comprises an upper mandrel and a lower mandrel which are coaxially fixedly connected, and the outer diameter of the upper mandrel is smaller than that of the lower mandrel. The upper mandrel is located inside the pressure reduction cylinder, and the outer wall surface of the upper mandrel can axially slide or radially rotate relative to the inner wall surface of the pressure reduction cylinder. The main drill bit is coaxially fixedly arranged at the bottom end of the lower mandrel. An elastic return member is arranged at the top end of the upper mandrel, a connecting ring is fixedly arranged at the top end of the elastic return member, and the connecting ring is rotationally matched with the pressure reduction cylinder or the upper joint. An upper torque transmission mechanism is arranged at the bottom end of the pressure reduction cylinder, and a lower torque transmission mechanism is arranged at the top end of the lower mandrel. When there is no axial relative movement between the pressure reduction cylinder and the mandrel, the upper torque transmission mechanism and the lower torque transmission mechanism are matched to transmit torque between the pressure reduction cylinder and the mandrel. When the pressure-reducing cylinder is vibrated downward relative to the core shaft, the elastic return member is compressed, the upper torque transmission mechanism moves downward relative to the lower torque transmission mechanism, and the core shaft is rotated by a certain angle along the torque transmission direction relative to the pressure-reducing cylinder while torque is transmitted between the pressure-reducing cylinder and the core shaft. When the pressure-reducing cylinder is vibrated upward relative to the core shaft, the core shaft does not follow the upward vibration under the elastic force of the elastic return member, the upper torque transmission mechanism moves upward relative to the lower torque transmission mechanism, and the core shaft is rotated by a certain angle in the opposite direction along the torque transmission direction relative to the pressure-reducing cylinder while torque is transmitted between the pressure-reducing cylinder and the core shaft.

[0006] Preferably, the inner wall surface of the upper core shaft is uniformly provided with a plurality of shunt holes penetrating the outer wall surface of the upper core shaft in the circumferential direction; The inner wall surface of the pressure-reducing cylinder is uniformly provided with a plurality of annular flow channels corresponding to the shunt holes in the circumferential direction, and the annular flow channels are provided with nozzles; When the pressure-reducing cylinder and the core shaft move relative to each other in the axial direction, when the shunt hole and the corresponding annular flow channel are communicated, the drilling fluid flows out through the communicated shunt hole, annular flow channel and nozzle, thereby reducing the pressure of the drilling fluid at the bottom of the well.

[0007] Preferably, the middle part of the main drill bit is provided with an amplitude rod extending in the vertical direction, and the bottom end of the amplitude rod is provided with a center drill bit that can reach the center position of the main drill bit. The top end of the amplitude rod is adapted with a magnetostrictive transducer, and the magnetostrictive transducer is fixedly arranged on the inner side of the bottom end of the lower core shaft.

[0008] Preferably, the upper torque transmission mechanism includes a plurality of wedge-shaped blocks uniformly arranged in the circumferential direction, and the radial outer wall surface of the wedge-shaped block coincides with the radial outer wall surface of the pressure-reducing cylinder. The lower torque transmission mechanism includes a plurality of wedge-shaped grooves corresponding to the wedge-shaped blocks in the circumferential direction.

[0009] Preferably, one side surface of the wedge-shaped block in the circumferential direction is an upper inclined surface, and the other side surface of the wedge-shaped block in the circumferential direction is an upper vertical surface extending in the axial direction of the pressure-reducing cylinder. The arc length of the radial outer wall surface of the wedge-shaped block in the circumferential direction gradually decreases from top to bottom. One side surface of the wedge-shaped groove in the circumferential direction is a lower inclined surface, and the other side surface of the wedge-shaped groove in the circumferential direction is a lower vertical surface extending in the axial direction of the core shaft. During the rotation or vibration of the pressure-reducing cylinder, the wedge-shaped block is always located in the corresponding wedge-shaped groove, and the upper inclined surface always matches the corresponding lower inclined surface.

[0010] Preferably, when the pressure-reducing cylinder is vibrated downward relative to the core shaft, the magnetostrictive transducer controls the amplitude rod to extend downward when the distance between the upper torque transmission mechanism and the lower torque transmission mechanism reaches a set value, and the center drill bit at the bottom end of the amplitude rod reaches the center position of the main drill bit to break rock together with the main drill bit. When the pressure-reducing cylinder is vibrated upward relative to the core shaft, the magnetostrictive transducer controls the amplitude rod to reset upward, and the center drill bit at the bottom end of the amplitude rod is retracted upward.

[0011] Preferably, the lower torque transmission mechanism is provided with a distance sensor for detecting the distance between the upper torque transmission mechanism and the lower torque transmission mechanism. The distance sensor is electrically connected with a controller, and the controller is electrically connected with the magnetostrictive transducer.

[0012] Preferably, the upper core shaft is coaxially fixed with an annular hanging block on the upper part of the outer side wall, and the pressure-reducing cylinder is provided with an annular step on the inner side wall. The inner side wall of the pressure-reducing cylinder at the upper part of the annular step is adapted to the outer side wall of the annular hanging block, and the inner side wall of the pressure-reducing cylinder at the lower part of the annular step is adapted to the outer side wall of the upper core shaft at the lower part of the annular hanging block.

[0013] Preferably, the elastic reset member is a spring.

[0014] The application also provides a downhole multifunctional energy synergistic regulation and control drilling speed increasing method.

[0015] A downhole multifunctional energy synergistic regulation and control drilling speed increasing method is implemented based on a downhole multifunctional energy synergistic regulation and control drilling speed increasing tool, and the speed increasing method comprises the following steps: The drill string drives the pressure-reducing cylinder to rotate, and the upper torque transmission mechanism cooperates with the lower torque transmission mechanism to transmit torque between the pressure-reducing cylinder and the core shaft, so as to drive the core shaft to rotate and break rock together with the main drill bit. When the drill string drives the pressure-reducing cylinder to vibrate downward relative to the core shaft: The elastic reset member is compressed, the upper torque transmission mechanism moves downward relative to the lower torque transmission mechanism, torque is transmitted between the pressure-reducing cylinder and the core shaft, the axial force of the drill string vibrating downward is converted into a torsional force for driving the core shaft to rotate relative to the pressure-reducing cylinder along the torque transmission direction, an additional torsional impact force is applied to the main drill bit, and rock breaking is accelerated. When the drill string vibrates downward to a position, the magnetostrictive transducer controls the amplitude rod to extend downward, and the center drill bit at the bottom end of the amplitude rod reaches the center position of the main drill bit to break rock together with the main drill bit. When the pressure-reducing cylinder vibrates downward, the shunt hole and the corresponding annular flow channel are staggered up and down. When the drill string drives the pressure-reducing cylinder to vibrate upward relative to the core shaft: Under the action of the elastic force of the elastic reset member and the torque transmission between the upper torque transmission mechanism and the lower torque transmission mechanism, the axial force and the torsional force required for the main drill bit to break rock are ensured, and continuous rock breaking is realized. When the pressure relief cylinder is upwardly vibrated to reset, the magnetostrictive transducer controls the amplitude lever to reset upwardly, when the shunt hole is communicated with the corresponding annular flow channel, the drilling fluid flows out through the communicated shunt hole, annular flow channel and nozzle, and the pressure of the drilling fluid at the well bottom is reduced; When the drilling string drives the pressure relief cylinder to rotate while performing periodic axial vibration, the above process is repeated, and the multifunctional collaborative speed-up rock breaking process of continuous rock breaking of the main drill bit, periodic accelerated rock breaking of the main drill bit, periodic step rock breaking of the center drill bit and periodic pressure reduction of the drilling fluid at the well bottom is realized.

[0016] The beneficial effects of the present application are: (1) The present application realizes the following effects through the axial movement and radial rotation connection relationship between the core shaft and the pressure relief cylinder, the setting of the elastic reset member and the cooperation relationship between the upper torque transmission mechanism and the lower torque transmission mechanism: when the pressure relief cylinder is downwardly vibrated, the axial force of the downward vibration of the pressure relief cylinder is converted into a torsional force for promoting the rotation of the core shaft and the main drill bit relative to the pressure relief cylinder, that is, an additional torsional impact force is applied to the main drill bit to accelerate rock breaking; when the pressure relief cylinder is upwardly vibrated, the core shaft and the main drill bit do not follow the upward vibration, thus achieving the effect of absorbing vibration underground; in addition, under the action of the elastic force of the elastic reset member and the torque transmission between the upper torque transmission mechanism and the lower torque transmission mechanism, the main drill bit still has the axial force and torsional force required for rock breaking when the pressure relief cylinder is upwardly vibrated to reset, continuous rock breaking is realized, and the drilling speed is ensured.

[0017] (2) In the process of upward and downward vibration of the pressure relief cylinder of the present application, when the shunt hole is communicated with the corresponding annular flow channel, the drilling fluid flows out through the communicated shunt hole, annular flow channel and nozzle, and the pressure of the drilling fluid at the well bottom is reduced.

[0018] (3) Through the setting of the amplitude lever and the upward and downward vibration of the pressure relief cylinder, the present application can realize the joint rock breaking of the center drill bit at the bottom end of the amplitude lever and the main drill bit.

[0019] (4) When the drilling string drives the pressure relief cylinder to rotate while performing periodic axial vibration, the above process is repeated, and the multifunctional collaborative speed-up rock breaking process of continuous rock breaking of the main drill bit, periodic accelerated rock breaking of the main drill bit, periodic step rock breaking of the center drill bit and periodic pressure reduction of the drilling fluid at the well bottom is realized. BRIEF DESCRIPTION OF DRAWINGS

[0020] The drawings accompanying the specification of the present application form a part of the present application and serve to provide further understanding of the present application, the illustrative embodiments of the present application and their descriptions serve to explain the present application, and do not constitute improper limitations on the present application.

[0021] Figure 1 is a structural schematic diagram of the downhole multifunctional energy collaborative regulation drilling speed-up tool of the present application; Figure 2is a structural schematic diagram of the upper transmission mechanism in the application; Figure 3 is a structural schematic diagram of the lower transmission mechanism in the application; Figure 4 is a schematic diagram of the cooperation of the upper transmission mechanism and the lower transmission mechanism when the pressure-reducing cylinder vibrates downward in the application; wherein: 1, upper joint; 2, pressure-reducing cylinder; 21, annular flow channel; 22, nozzle; 23, annular step; 3, mandrel; 31, upper mandrel; 311, shunt hole; 312, annular hanging block; 32, lower mandrel; 4, main drill bit; 5, elastic reset member; 51, connecting ring; 6, wedge-shaped block; 61, upper inclined surface; 62, upper vertical surface; 7, wedge-shaped groove; 71, lower inclined surface; 72, lower vertical surface; 8, amplitude-changing rod; 81, magnetostrictive transducer; 82, center drill bit. DETAILED DESCRIPTION

[0022] It should be noted that the following detailed description is exemplary and is intended to provide further description of the present application. 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 application belongs.

[0023] It should be noted that the terms used herein are only intended to describe specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should be understood that when the terms "comprise" and / or "include" are used in the specification, there is a reference to the presence of a feature, step, operation, device, component, and / or combinations thereof.

[0024] In the present application, the terms such as "upper", "lower", "bottom", "top", etc. indicate the orientation or positional relationship shown in the drawings, which is only a relationship word determined for the purpose of describing the structural relationship of the components or elements of the present application, and cannot be understood as a limitation of the present application.

[0025] In the present application, the terms such as "connected", "connected" and the like should be understood broadly, which means that it can be fixedly connected, integrally connected or detachably connected; it can be directly connected or indirectly connected through an intermediate medium. For relevant researchers or technicians in the art, the specific meaning of the above terms in the present application can be determined according to the specific circumstances, and cannot be understood as a limitation of the present application.

[0026] The present application will be further described below in conjunction with the drawings and examples.

[0027] Example 1: As Figures 1-4As shown, a downhole multifunctional energy synergistic control drilling speed increasing tool comprises an upper joint 1, a pressure reducing cylinder 2, a mandrel 3 and a main drill bit 4 connected coaxially in sequence; The upper joint 1 is coaxially fixedly connected with the pressure reducing cylinder 2. The mandrel 3 comprises an upper mandrel 31 and a lower mandrel 32 fixed coaxially, wherein the outer diameter of the upper mandrel 31 is smaller than that of the lower mandrel 32; the upper mandrel 31 is located inside the pressure reducing cylinder 2, and the outer wall surface of the upper mandrel 31 can axially slide or radially rotate relative to the inner wall surface of the pressure reducing cylinder 2; and the main drill bit 4 is coaxially fixedly arranged at the bottom end of the lower mandrel 32. The top end of the upper mandrel 31 is provided with an elastic reset member 5, and the top end of the elastic reset member 5 is fixedly provided with a connecting ring 51 which is rotationally matched with the pressure reducing cylinder 2 or the upper joint 1; specifically, in the present application, the bottom end of the upper joint 1 is inserted into the inside of the top end of the pressure reducing cylinder 2, and the top end of the connecting ring 51 is rotationally matched with the bottom end of the upper joint 1, which can be realized by a bearing. The bottom end of the pressure reducing cylinder 2 is provided with an upper torque transmission mechanism, and the top end of the lower mandrel 32 is provided with a lower torque transmission mechanism. When there is no relative movement in the axial direction between the pressure reducing cylinder 2 and the mandrel 3, the upper torque transmission mechanism is matched with the lower torque transmission mechanism to transmit torque between the pressure reducing cylinder 2 and the mandrel 3. When the pressure reducing cylinder 2 vibrates downward relative to the mandrel 3, the elastic reset member 5 is compressed, the upper torque transmission mechanism moves downward relative to the lower torque transmission mechanism, and the torque transmission between the pressure reducing cylinder 2 and the mandrel 3 at the same time promotes the mandrel 3 to rotate a certain angle relative to the pressure reducing cylinder 2 in the torque transmission direction, that is, the downward vibration of the pressure reducing cylinder 2 is converted into a torsional force promoting the mandrel 3 to rotate relative to the pressure reducing cylinder 2. When the pressure reducing cylinder 2 vibrates upward relative to the mandrel 3, the mandrel 3 does not follow the upward vibration under the elastic force of the elastic reset member 5, the upper torque transmission mechanism moves upward relative to the lower torque transmission mechanism, and the torque transmission between the pressure reducing cylinder 2 and the mandrel 3 at the same time promotes the mandrel 3 to rotate a certain angle relative to the pressure reducing cylinder 2 in the reverse direction of the torque transmission direction.

[0028] In the present application, when the pressure reducing cylinder 2 drives the upper torque transmission mechanism to rotate, the upper torque transmission mechanism is matched with the lower torque transmission mechanism to transmit torque, promoting the mandrel 3 to drive the main drill bit 4 to synchronously rotate with the pressure reducing cylinder 2. When the pressure reducing cylinder 2 drives the upper torque transmission mechanism to rotate while vibrating downward, the elastic reset member 5 is compressed, the upper torque transmission mechanism moves downward relative to the lower torque transmission mechanism, and the mandrel 3 drives the main drill bit 4 to rotate with the pressure reducing cylinder 2 while rotating a certain angle relative to the pressure reducing cylinder 2 in the same direction. When the pressure-reducing cylinder 2 drives the upper torsion mechanism to rotate and simultaneously vibrates upward, the mandrel 3 and the main drill bit 4 do not follow the upward vibration under the elastic force of the elastic return member 5, the upper torsion mechanism moves upward relative to the lower torsion mechanism, and the mandrel 3 drives the main drill bit 4 to rotate relative to the pressure-reducing cylinder 2 by a certain angle in the opposite direction while following the rotation of the pressure-reducing cylinder 2.

[0029] The present application, through the axial movement and radial rotation connection between the upper mandrel 31 and the pressure-reducing cylinder 2, the setting of the elastic return member 5, and the cooperation between the upper and lower torsion mechanisms, when the pressure-reducing cylinder 2 vibrates downward, the axial force of the downward vibration of the pressure-reducing cylinder 2 is converted into a torsional force that drives the mandrel 3 and the main drill bit 4 to rotate relative to the pressure-reducing cylinder 2, that is, an additional torsional impact force is applied to the main drill bit 4, accelerating rock breaking; when the pressure-reducing cylinder 2 vibrates upward, the mandrel 3 and the main drill bit 4 do not follow the upward vibration, thus achieving the effect of absorbing vibration underground. In addition, under the elastic force of the elastic return member 5 and the action of torque transmission between the upper and lower torsion mechanisms, the main drill bit 4 still has the axial force and torsional force required for rock breaking when the pressure-reducing cylinder 2 vibrates upward, realizing continuous rock breaking and ensuring drilling speed.

[0030] Preferably, the upper torsion mechanism comprises a plurality of wedge-shaped blocks 6 uniformly arranged in the circumferential direction, wherein the radial inner wall surface of the wedge-shaped block 6 coincides with the radial inner wall surface of the pressure-reducing cylinder 2, and the radial outer wall surface of the wedge-shaped block 6 coincides with the radial outer wall surface of the pressure-reducing cylinder 2. The lower torsion mechanism comprises a plurality of wedge-shaped grooves 7 corresponding to the wedge-shaped blocks 6 uniformly arranged in the circumferential direction.

[0031] Preferably, one side surface of the wedge-shaped block 6 in the circumferential direction is an upper inclined surface 61, and the other side surface of the wedge-shaped block 6 in the circumferential direction is an upper vertical surface 62 extending in the axial direction of the pressure-reducing cylinder 2. The arc length of the radial outer wall surface of the wedge-shaped block 6 in the circumferential direction gradually decreases from top to bottom. One side surface of the wedge-shaped groove 7 in the circumferential direction is a lower inclined surface 71, and the other side surface of the wedge-shaped groove 7 in the circumferential direction is a lower vertical surface 72 extending in the axial direction of the mandrel 3. During the rotation or up-down vibration of the pressure-reducing cylinder 2, the wedge-shaped block 6 is always located in the corresponding wedge-shaped groove 7, and the upper inclined surface 61 is always in close contact with the corresponding lower inclined surface 71.

[0032] When the pressure-reducing cylinder 2 drives the upper torsion mechanism to rotate without axial relative movement between the pressure-reducing cylinder 2 and the mandrel 3, the upper inclined surface 61 is always in close contact with the corresponding lower inclined surface 71 for torque transmission, driving the mandrel 3 to drive the main drill bit 4 to rotate synchronously with the pressure-reducing cylinder 2. When the upper torsion mechanism is rotated by the pressure-reducing cylinder 2 and vibrates downward at the same time, the elastic return member 5 is compressed, the upper inclined surface 61 moves downward along the corresponding lower inclined surface 71, and the mandrel 3 drives the main drill bit 4 to rotate by the pressure-reducing cylinder 2 and rotate in the torque transmission direction relative to the pressure-reducing cylinder 2 by an angle β at the same time, that is, when the upper torsion mechanism is rotated by the pressure-reducing cylinder 2 by an angle α and vibrates downward at the same time, the mandrel 3 drives the main drill bit 4 to rotate by the pressure-reducing cylinder 2 by an angle α and rotate in the same direction relative to the pressure-reducing cylinder 2 by an angle β, that is, the mandrel 3 drives the main drill bit 4 to rotate by an angle α+β. When the upper torsion mechanism is rotated by the pressure-reducing cylinder 2 and vibrates upward at the same time, the mandrel 3 and the main drill bit 4 do not follow the upward vibration under the elastic force of the elastic return member 5, the upper inclined surface 61 moves upward along the corresponding lower inclined surface 71, and the mandrel 3 drives the main drill bit 4 to rotate by the pressure-reducing cylinder 2 and rotate in the opposite direction relative to the pressure-reducing cylinder 2 by an angle β at the same time, that is, when the upper torsion mechanism is rotated by the pressure-reducing cylinder 2 by an angle α and vibrates upward at the same time, the mandrel 3 drives the main drill bit 4 to rotate by an angle α-β.

[0033] Preferably, the upper mandrel 31 is coaxially fixed with an annular hanging block 312 on the outer side wall of the upper mandrel 31, and the inner side wall of the pressure-reducing cylinder 2 is provided with an annular step 23. The inner side wall of the pressure-reducing cylinder 2 at the upper part of the annular step 23 is matched with the outer side wall of the annular hanging block 312, and the inner side wall of the pressure-reducing cylinder 2 at the lower part of the annular step 23 is matched with the outer side wall of the upper mandrel 31 at the lower part of the annular hanging block 312.

[0034] Preferably, the elastic return member 5 is a spring.

[0035] Embodiment 2 On the basis of embodiment 1, a plurality of shunt holes 311 that pass through the outer wall of the upper mandrel 31 are uniformly arranged on the inner wall of the upper mandrel 31 in the circumferential direction. A plurality of annular flow channels 21 corresponding to the shunt holes 311 are uniformly arranged on the inner wall of the pressure-reducing cylinder 2 in the circumferential direction, and a nozzle 22 is arranged in each annular flow channel 21. When the shunt hole 311 communicates with the corresponding annular flow channel 21 during the axial relative movement between the pressure-reducing cylinder 2 and the mandrel 3, the drilling fluid flows out through the communicating shunt hole 311, annular flow channel 21, and nozzle 22, thereby reducing the pressure of the drilling fluid at the bottom of the well.

[0036] In embodiment 2, when the shunt hole 311 communicates with the corresponding annular flow channel 21 during the upward and downward vibration of the pressure-reducing cylinder 2, the drilling fluid flows out through the communicating shunt hole 311, annular flow channel 21, and nozzle 22, thereby reducing the pressure of the drilling fluid at the bottom of the well.

[0037] Embodiment 3 On the basis of embodiment 2, the middle part of the main drill bit 4 is provided with a vertical amplitude lever 8, the bottom end of the amplitude lever 8 is provided with a center drill bit 82 which can reach the center position of the main drill bit 4; The top end of the amplitude lever 8 is adapted with a magnetostrictive transducer 81 which is fixedly arranged inside the bottom end of the lower mandrel 32.

[0038] Preferably, when the distance between the upper torque transmission mechanism and the lower torque transmission mechanism reaches a set value when the bottom end of the wedge block 6 is away from the bottom end of the wedge groove 7 by a set distance, the magnetostrictive transducer 81 controls the amplitude lever 8 to elongate downward, and the center drill bit 82 at the bottom end of the amplitude lever 8 reaches the center position of the main drill bit 4 to jointly break rocks with the main drill bit 4 when the pressure relief cylinder 2 vibrates downward relative to the mandrel 3; When the pressure relief cylinder 2 vibrates upward relative to the mandrel 3, the magnetostrictive transducer 81 controls the amplitude lever 8 to reset upward, and the center drill bit 82 at the bottom end of the amplitude lever 8 is withdrawn upward.

[0039] Preferably, the lower torque transmission mechanism is provided with a distance sensor for detecting the distance between the upper torque transmission mechanism and the lower torque transmission mechanism, and specifically, the bottom end of the wedge groove 7 is downwardly embedded with a distance sensor for detecting the distance between the bottom end of the wedge block 6 and the bottom end of the corresponding wedge groove 7. The distance sensor is electrically connected with a controller, and the controller is electrically connected with the magnetostrictive transducer 81.

[0040] In embodiment 3, through the setting of the amplitude lever 8 and the upward and downward vibration of the pressure relief cylinder 2, the joint rock breaking of the center drill bit 82 at the bottom end of the amplitude lever 8 and the main drill bit 4 can be realized.

[0041] Among them, the upper joint 1, the pressure relief cylinder 2, and the middle part of the mandrel 3 are all provided with a first drilling fluid flow channel which penetrates through in the axial direction, the main drill bit 4 is provided with a second drilling fluid flow channel, and the magnetostrictive transducer 81 is provided with an axial flow channel for connecting the first drilling fluid flow channel and the second drilling fluid flow channel.

[0042] Embodiment 4: A downhole multifunctional energy synergistic control drilling speed-up method is implemented based on the downhole multifunctional energy synergistic control drilling speed-up tool in embodiment 3, and the speed-up method is as follows: The drill string drives the pressure relief cylinder 2 to rotate, and the upper torque transmission mechanism cooperates with the lower torque transmission mechanism to transmit torque between the pressure relief cylinder 2 and the mandrel 3, so as to drive the mandrel 3 to rotate and break rocks with the main drill bit 4; When the drill string drives the pressure relief cylinder 2 to vibrate downward relative to the mandrel 3: The elastic reset member 5 is compressed, the upper torque transmission mechanism moves downward relative to the lower torque transmission mechanism, and the axial force of the drill string downward vibration is converted into the torsional force to promote the rotation of the mandrel 3 relative to the pressure relief cylinder 2 along the torque transmission direction while the torque is transmitted between the pressure relief cylinder 2 and the mandrel 3, which applies an additional torsional impact force to the main drill bit 4 and accelerates rock breaking; When the drill string is downwardly vibrated to the position, the magnetostrictive transducer 81 controls the downward extension of the horn 8, and the center drill bit 82 at the bottom end of the horn 8 reaches the center position of the main drill bit 4 to break rocks together with the main drill bit 4; When the pressure relief cylinder 2 is downwardly vibrated, the shunt hole 311 is staggered with the corresponding annular flow passage 21 up and down; When the drill string drives the pressure relief cylinder 2 to upwardly vibrate and reset relative to the mandrel 3: Under the action of the elastic force of the elastic reset member 5 and the torque transmission between the upper torque transmission mechanism and the lower torque transmission mechanism, the axial force and the torsional force required for the main drill bit 4 to break rocks are ensured, and continuous rock breaking is realized; When the pressure relief cylinder 2 is upwardly vibrated and reset, the magnetostrictive transducer 81 controls the upward reset of the horn 8, and when the shunt hole 311 is communicated with the corresponding annular flow passage 21, the drilling fluid flows out through the communicated shunt hole 311, annular flow passage 21 and nozzle 22, and the bottom hole drilling fluid pressure is reduced; When the drill string drives the pressure relief cylinder 2 to rotate while performing periodic axial vibration, the above process is repeated, and the multifunctional cooperative speed-up rock breaking process of the continuous rock breaking of the main drill bit 4, the periodic acceleration rock breaking of the main drill bit 4, the periodic step rock breaking of the center drill bit 82 and the periodic pressure reduction of the bottom hole drilling fluid is realized.

[0043] The above describes the specific embodiments of the present application in combination with the drawings, but is not a limitation of the present application. Those skilled in the art should understand that various modifications or variations made by those skilled in the art without creative labor on the basis of the technical solutions of the present application are still within the protection scope of the present application.

Claims

1. A multi-functional downhole energy-coordinated control drilling speed-up tool, characterized in that, It includes an upper connector, a pressure reducing cylinder, a mandrel, and a main drill bit, which are connected coaxially in sequence. The upper connector is coaxially and fixedly connected to the pressure-reducing cylinder; The mandrel includes an upper mandrel and a lower mandrel that are coaxially fixed together. The outer diameter of the upper mandrel is smaller than that of the lower mandrel. The upper mandrel is located inside the pressure-reducing cylinder, and the outer wall surface of the upper mandrel can slide axially or rotate radially relative to the inner wall surface of the pressure-reducing cylinder. The main drill bit is coaxially fixed at the bottom end of the lower mandrel. The top end of the upper mandrel is provided with an elastic reset member, and the top end of the elastic reset member is fixedly provided with a connecting ring, which is rotatably engaged with the pressure reducing cylinder or the upper connector. The bottom end of the pressure reducing cylinder is provided with an upward torque mechanism, and the top end of the lower spindle is provided with a downward torque mechanism. When there is no relative axial movement between the pressure-reducing cylinder and the spindle, the upper torque mechanism and the lower torque mechanism cooperate to transmit torque between the pressure-reducing cylinder and the spindle. When the pressure-reducing cylinder vibrates downward relative to the mandrel, the elastic reset member is compressed, and the upper torque mechanism moves downward relative to the lower torque mechanism. While transmitting torque between the pressure-reducing cylinder and the mandrel, the mandrel rotates relative to the pressure-reducing cylinder at a certain angle along the torque transmission direction. When the pressure-reducing cylinder vibrates upward relative to the mandrel, under the elastic force of the elastic reset member, the mandrel does not follow the upward vibration. The upper torque mechanism moves upward relative to the lower torque mechanism, and while torque is transmitted between the pressure-reducing cylinder and the mandrel, the mandrel is caused to rotate a certain angle in the opposite direction of the torque transmission relative to the pressure-reducing cylinder.

2. The downhole multi-functional energy-coordinated control drilling speed-up tool as described in claim 1, characterized in that, The inner wall of the upper mandrel is uniformly provided with several diversion holes that penetrate the outer wall of the upper mandrel along the circumferential direction. The inner wall of the pressure reducing cylinder is uniformly provided with a plurality of annular flow channels that correspond one-to-one with the flow diversion holes along the circumferential direction, and nozzles are provided in the annular flow channels. When the pressure reducing cylinder and the mandrel move relative to each other in the axial direction, and the diversion hole is connected to the corresponding annular flow channel, the drilling fluid flows out through the connected diversion hole, annular flow channel and nozzle, thereby reducing the pressure of the drilling fluid at the bottom of the well.

3. The downhole multi-functional energy-coordinated control drilling speed-up tool as described in claim 2, characterized in that, The main drill bit is provided with a vertically extending amplitude rod in the middle, and a center drill bit that can reach the center of the main drill bit is provided at the bottom end of the amplitude rod. A magnetostrictive transducer is fitted at the top of the amplitude rod, and the magnetostrictive transducer is fixedly installed on the inner side of the bottom end of the lower spindle.

4. The downhole multi-functional energy-coordinated control drilling speed-up tool as described in claim 3, characterized in that, The uploading torsion mechanism includes a plurality of wedge-shaped blocks evenly arranged along the circumference, wherein the radial outer wall surface of the wedge-shaped blocks coincides with the radial outer wall surface of the pressure reducing cylinder; The downward torque transmission mechanism includes wedge-shaped grooves that are uniformly arranged along the circumferential direction and correspond one-to-one with the wedge blocks.

5. The downhole multi-functional energy-coordinated control drilling speed-up tool as described in claim 4, characterized in that, One side of the wedge block along the circumferential direction is an upper inclined surface, and the other side of the wedge block along the circumferential direction is an upper vertical surface extending along the axial direction of the pressure reducing cylinder. The arc length of the radial outer wall surface of the wedge-shaped block gradually decreases from top to bottom along the circumferential direction; One side of the wedge-shaped groove along the circumferential direction is a lower inclined surface, and the other side of the wedge-shaped groove along the circumferential direction is a lower vertical surface extending along the axial direction of the mandrel. During the rotation or up-and-down vibration of the pressure reducing cylinder, the wedge block is always located in the corresponding wedge groove and the upper inclined surface is always in contact with the corresponding lower inclined surface.

6. The downhole multi-functional energy-coordinated control drilling speed-up tool as described in claim 3, characterized in that, When the pressure reducing cylinder vibrates downward relative to the core shaft, when the distance between the upper torque mechanism and the lower torque mechanism reaches the set value, the magnetostrictive transducer controls the amplitude rod to extend downward, and the center drill bit at the bottom of the amplitude rod reaches the center position of the main drill bit and breaks the rock together with the main drill bit. When the pressure-reducing cylinder vibrates upward relative to the core axis, the magnetostrictive transducer controls the amplitude rod to reset upward, and the central drill bit at the bottom of the amplitude rod retracts upward.

7. The downhole multi-functional energy-coordinated control drilling speed-up tool as described in claim 3, characterized in that, The downward transmission mechanism is equipped with a distance sensor for detecting the distance between the upward transmission mechanism and the downward transmission mechanism. The distance sensor is electrically connected to the controller, and the controller is electrically connected to the magnetostrictive transducer.

8. The downhole multi-functional energy-coordinated control drilling speed-up tool as described in claim 3, characterized in that, An annular hanging block is coaxially fixed on the upper part of the outer side wall of the upper mandrel, and an annular step is provided on the inner side wall of the pressure reducing cylinder. The inner wall of the pressure-reducing cylinder at the upper part of the annular step is adapted to fit and adhere to the outer wall of the annular hanging block, and the inner wall of the pressure-reducing cylinder at the lower part of the annular step is adapted to fit and adhere to the outer wall of the upper mandrel at the lower part of the annular hanging block.

9. The downhole multi-functional energy-coordinated control drilling speed-up tool as described in claim 3, characterized in that, The elastic reset element is a spring.

10. A downhole multi-functional energy-coordinated control drilling speed-up method, implemented based on the downhole multi-functional energy-coordinated control drilling speed-up tool as described in any one of claims 3 to 9, characterized in that, The speed-up method is as follows: The drill string drives the pressure reducing cylinder to rotate. The upper torque mechanism and the lower torque mechanism cooperate to transmit torque between the pressure reducing cylinder and the mandrel, causing the mandrel to drive the main drill bit to rotate and break the rock. When the drill string drives the pressure reducing cylinder to vibrate downwards relative to the mandrel: The elastic reset component is compressed, and the upper torque mechanism moves downward relative to the lower torque mechanism. While transmitting torque between the pressure reducing cylinder and the mandrel, the axial force of the drill string vibrating downward is converted into a torsional force that causes the mandrel to rotate relative to the pressure reducing cylinder in the direction of torque transmission. This applies an additional torsional impact force to the main drill bit, accelerating rock breaking. When the drill string vibrates downwards to the desired position, the magnetostrictive transducer controls the amplitude rod to extend downwards, and the center drill bit at the bottom of the amplitude rod reaches the center position of the main drill bit and breaks the rock together with the main drill bit. When the pressure reducing cylinder vibrates downward, the diversion hole and the corresponding annular flow channel are staggered vertically; When the drill string drives the pressure reducing cylinder to vibrate upwards relative to the mandrel and reset: Under the elastic force of the elastic reset component and the torque transmission between the upper and lower torque transmission mechanisms, the axial force and torsional force required for the main drill bit to break rock are ensured, thus achieving continuous rock breaking. When the pressure reducing cylinder vibrates upward to reset, the magnetostrictive transducer controls the amplitude rod to reset upward. When the diversion hole is connected to the corresponding annular flow channel, the drilling fluid flows out through the connected diversion hole, annular flow channel, and nozzle, thereby reducing the pressure of the drilling fluid at the bottom of the well. When the drill string drives the pressure-reducing cylinder to rotate while performing axial periodic vibration, the above process repeats continuously, realizing a multi-functional synergistic acceleration rock breaking process that includes continuous rock breaking by the main drill bit, periodic accelerated rock breaking by the main drill bit, periodic stepping rock breaking by the center drill bit, and periodic pressure reduction of the drilling fluid at the bottom of the well.

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