PDC bit with automatically updated composite blades

Abstract

This invention belongs to the field of oil and gas drilling technology, specifically relating to a PDC drill bit with automatically updating composite cutting discs. It aims to solve the problem of existing drill bits requiring tripping and bit replacement when drilling speed decreases due to tooth wear, thus affecting drilling efficiency. The PDC drill bit with automatically updating composite cutting discs includes a drill bit body, a mounting groove on the drill bit body, and multiple cutting discs arranged side-by-side in the mounting groove. Below the mounting groove is a longitudinally extending output channel communicating with the mounting groove, and adjacent cutting discs are connected in the output channel by a tenon and mortise structure. It also includes a drive device located at the bottom of the drill bit body. During normal drill bit operation, the drive device is pressurized and stores power; when the drill bit is lifted, the drive device applies a downward pulling force to the cutting discs to move them downwards. This PDC drill bit can automatically update the cutting discs during drilling, to a certain extent avoiding tripping due to drill bit wear and improving production efficiency.

Description

Technical Field

[0001] This invention belongs to the field of oil and gas drilling technology, and specifically relates to a PDC drill bit with an automatic composite plate update. Background Technology

[0002] As the exploration and development of shallow oil and gas reservoirs enters the mid-to-late stages, and the demand for deep and ultra-deep wells gradually increases, improving drilling speed and efficiency remains a perennial topic in oil and gas field exploration. In terms of drilling speed enhancement, drill bits have evolved to include liger bits, various special-shaped tooth bits, and 360mm bits. Speed-enhancing tools include high-power screw drills, high-temperature resistant screw drills, turbine drills, and torque impactors. Among these, 360mm bits improve drilling speed by increasing the drill bit's abrasiveness, screw drills and turbine drills increase drilling speed by providing high rotational speeds, and torque impactors increase drilling speed by protecting PDC (partially driven die) drill bits. However, all these measures inevitably require tripping and bit replacement when drill bit wear and tooth breakage occur, leading to reduced drilling speed and impacting drilling efficiency. Summary of the Invention

[0003] This invention provides a PDC drill bit with automatic composite plate renewal to alleviate the problem of existing drill bits requiring tripping and bit replacement when the drilling speed decreases due to tooth breakage and wear, thus affecting drilling efficiency.

[0004] To alleviate the aforementioned technical problems, the present invention provides a PDC drill bit with automatic composite blade updating, comprising a drill bit body, a mounting groove disposed on the drill bit body, and a plurality of cutting blades disposed side by side in the mounting groove; an output channel extending longitudinally and communicating with the mounting groove is disposed below the mounting groove, and adjacent cutting blades are connected in the output channel by a tenon and mortise structure; it also includes a drive device disposed at the bottom of the drill bit body, which is pressurized and stores force when the drill bit is working normally; when the drill bit is lifted, the drive device applies a downward pulling force to the cutting blades to drive the cutting blades to move downward.

[0005] Furthermore, it also includes a drive unit disposed in the mounting slot, the drive unit including a cutting blade pusher plate located behind multiple cutting blades and a first spring; the cutting blade pusher plate and the wall of the mounting slot away from the output channel are connected by the first spring; the first spring is always in a compressed state and has a tendency to push the cutting blade pusher plate toward the output channel.

[0006] Furthermore, the cutting blade pusher plate and the cutting blade are connected by a first limiting mechanism. The first limiting mechanism includes a second protrusion disposed on the side of the cutting blade pusher plate near the cutting blade and a second groove disposed on the side of the cutting blade near the cutting blade pusher plate, with the second protrusion and the second groove engaging.

[0007] Furthermore, the drive device includes a first straightening component, a second straightening component, and a second spring connected to the bottom of the drill bit body; the second straightening component includes a straightening block and a pin connected to the top of the straightening block, and the bottom of the first straightening component is provided with a mounting hole, into which the pin is inserted; the second spring is fitted onto the pin and the top of the second spring abuts against the bottom of the first straightening component; when the drill bit is working normally, the second spring is compressed and stores force.

[0008] Furthermore, the first and second straightening components are slidably connected by a connecting mechanism; the connecting mechanism includes a longitudinal groove on a pin, a positioning hole on the first straightening component, and a first limiting pin arranged laterally and passing through the groove and the positioning hole.

[0009] Furthermore, both the first and second straightening components are provided with longitudinally penetrating channels, and these channels are part of the output channels.

[0010] Furthermore, the drive device also includes a second limiting mechanism, which includes a guide groove disposed on the side of the cutting blade near the cutting blade push plate and an anti-tipping latch disposed on the wall adjacent to the output channel and the guide groove. The anti-tipping latch extends into the guide groove and restricts the cutting blade to move only downwards through a downwardly inclined limiting plate.

[0011] Furthermore, the anti-tipping latch has a triangular cross-section. The anti-tipping latch includes a base plate, a downwardly inclined limiting plate located above the base plate, and a side plate connected between the base plate and the limiting plate. The base plate and the side plate are perpendicular to each other. The vertical distance between the opening end of the limiting plate and the side plate is equal to the length of the base plate, and then the limiting plate continues to extend away from the side plate to form a protrusion. The guide groove includes a downwardly inclined wall and a transverse wall connected below the inclined wall. The protrusion of the limiting plate extends into the guide groove.

[0012] Furthermore, a third protrusion is provided on the side of the cutting blade far from the cutting blade pusher plate; a third groove extending longitudinally is provided on the wall surface of the mounting groove and the output channel adjacent to the third protrusion; the third protrusion matches the third groove.

[0013] Furthermore, along the output direction of the cutting blade, the tenon structure includes a first protrusion disposed near one of the input end and the output end of the cutting blade, and a first groove disposed near the other of the input end and the output end of the cutting blade.

[0014] The beneficial effects of the PDC drill bit with automatic composite plate updating in this invention are analyzed as follows:

[0015] An automatically updating composite cutting disc PDC drill bit includes a drill bit body, a mounting groove on the drill bit body, and multiple cutting discs arranged side by side in the mounting groove; an output channel extending longitudinally and communicating with the mounting groove is provided below the mounting groove, and adjacent cutting discs are connected in the output channel by a tenon and mortise structure; it also includes a drive device located at the bottom of the drill bit body, which is pressurized and stores power when the drill bit is working normally; when the drill bit is lifted, the drive device applies a downward pulling force to the cutting discs to drive the cutting discs to move downward.

[0016] When the cutting disc needs to be replaced, the drill bit is lifted to remove it from the workpiece. The pressure stored in the drive unit by the workpiece is released, and the drive unit moves downward, causing the cutting disc at the bottom of the output channel to move downward. At the same time, the cutting disc moves the connected cutting disc downward through the tenon and mortise structure. Then, by pressing down the drill bit, the lower part of the cutting disc extends out of the drive unit and cuts the workpiece. When the extended part of the lower cutting disc wears down, the above operation is repeated to achieve automatic replacement of the cutting disc by moving it downward. Since there are multiple cutting discs in the mounting slot for backup, automatic replacement of the cutting disc is achieved by lifting and pressing down the drill bit during drilling. This avoids drilling interruptions caused by drill bit wear to a certain extent and improves production efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of the present invention, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 An isometric view of a PDC drill bit with an automatically updating composite sheet provided in an embodiment of the present invention;

[0019] Figure 2 A front view of the PDC drill bit with automatically updating composite plates provided in an embodiment of the present invention;

[0020] Figure 3 A longitudinal section view of the PDC drill bit with automatically updating composite plates provided in an embodiment of the present invention;

[0021] Figure 4 A schematic diagram of the cutting blade pusher plate provided in the embodiments of the present invention;

[0022] Figure 5 Isometric view of the PDC drill bit body + first centralizer provided in an embodiment of the present invention;

[0023] Figure 6 Isometric view of the second straightening member provided in the embodiments of the present invention;

[0024] Figure 7 Isometric view of the cutting disc provided in an embodiment of the present invention;

[0025] Figure 8 A left view of the cutting blade provided in an embodiment of the present invention;

[0026] Figure 9 Left view of the anti-tipping latch provided in an embodiment of the present invention;

[0027] Figure 10 An isometric view of the anti-tipping latch provided in the embodiments of the present invention.

[0028] icon:

[0029] 100-Drill bit body; 200-Mounting slot; 300-Cutting blade; 210-Third limiting pin; 310-First protrusion; 320-First groove; 330-Second groove; 340-Third protrusion; 350-Guide groove; 400-Drive component; 410-Cutting blade push plate; 420-First spring; 411-Second protrusion; 412-Second limiting pin; 500-Drive device; 510-First straightening component; 520-Second straightening component; 530 - Second spring; 521-Straightening block; 522-Pin; 523-First limit pin; 600-Anti-reverse locking buckle; 610-Limiting plate; 620-Base plate; 700-Cutting column; 800-Baffle plate; 900-Internal thread; 001-First channel; 002-Second channel; 003-Third channel; 004-Mounting hole; 005-Slide groove; 006-Positioning hole; 007-Third groove; 008-Opening; 009-Anti-reverse locking buckle mounting groove. Detailed Implementation

[0030] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Physical quantities in formulas, unless otherwise specified, should be understood as basic quantities in the International System of Units (SI), or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation, or integration.

[0032] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] As the exploration and development of shallow oil and gas reservoirs enters the mid-to-late stages, and the demand for deep and ultra-deep wells gradually increases, improving drilling speed and efficiency remains a perennial topic in oil and gas field exploration. In terms of drilling speed enhancement, drill bits have evolved to include liger bits, various special-shaped tooth bits, and 360mm bits. Speed-enhancing tools include high-power screw drills, high-temperature resistant screw drills, turbine drills, and torque impactors. Among these, 360mm bits improve drilling speed by increasing the drill bit's abrasiveness, screw drills and turbine drills increase drilling speed by providing high rotational speeds, and torque impactors increase drilling speed by protecting PDC (partially driven die) drill bits. However, all these measures inevitably require tripping and bit replacement when drill bit wear and tooth breakage occur, leading to reduced drilling speed and impacting drilling efficiency.

[0034] In view of this, the present invention provides a PDC drill bit with automatic composite refill, which can be referred to in conjunction with the present invention. Figures 1 to 10 The PDC drill bit includes a drill bit body 100, a mounting groove 200 disposed on the drill bit body 100, and a plurality of cutting blades 300 arranged side by side in the mounting groove 200; an output channel extending longitudinally and communicating with the mounting groove 200 is disposed below the mounting groove 200, and adjacent cutting blades 300 are connected in the output channel by a tenon and mortise structure; it also includes a drive device 500 disposed at the bottom of the drill bit body 100. When the drill bit is working normally, the drive device 500 is pressurized and stores power; when the drill bit is lifted, the drive device 500 applies a downward pulling force to the cutting blades 300 to drive the cutting blades 300 to move downward.

[0035] When the cutting disc 300 needs to be replaced, the drill bit is lifted to remove it from the workpiece. The pressure stored in the drive device 500 by the workpiece disappears, and the drive device 500 moves downward, causing the cutting disc 300 at the bottom of the output channel to move downward. At the same time, the cutting disc 300 moves the connected cutting discs 300 downward through the tenon and mortise structure. Then, by pressing down the drill bit, the lower part of the cutting disc 300 extends out of the drive device 500 and cuts the workpiece. When the extended part of the lower cutting disc 300 wears down, the above operation is repeated to achieve the downward movement and replacement of the cutting disc 300. Since there are multiple cutting discs 300 in the mounting slot 200 for backup, the automatic replacement of the cutting disc 300 is ensured during drilling by lifting and pressing down the drill bit. This avoids drilling interruptions caused by drill bit wear to a certain extent and improves production efficiency.

[0036] In an optional embodiment, a drive member 400 disposed in the mounting groove 200 is also included. The drive member 400 includes a cutting blade pusher plate 410 located behind the plurality of cutting blades 300 and a first spring 420. The cutting blade pusher plate 410 and the wall of the mounting groove 200 away from the output channel are connected by the first spring 420. The first spring 420 is always in a compressed state and has a tendency to push the cutting blade pusher plate 410 toward the output channel.

[0037] Furthermore, please refer to Figure 4 and Figure 5 The first spring 420 is limited by the third limiting mechanism, which includes a second limiting pin 412 disposed on the side of the cutting blade pusher plate 410 away from the cutting blade 300 and a third limiting pin 210 disposed on the wall surface of the mounting groove 200 away from the output channel. One end of the first spring 420 is fitted on the second limiting pin 412, and the other end of the first spring 420 is fitted on the third limiting pin 210. The first spring 420 is always in a compressed state and has the tendency to push the cutting blade pusher plate 410 toward the output channel.

[0038] Preferably, the third limiting mechanism is set in four groups: four second limiting pins 412 are arranged in a rectangle on the side of the cutting blade pusher plate 410 away from the cutting blade 300, and four third limiting pins 210 are arranged in a rectangle on the wall surface of the mounting groove 200 away from the output channel. The advantage of the rectangular arrangement is to avoid the cutting blade pusher plate 410 tilting during its movement toward the output channel.

[0039] In the optional solutions of this embodiment, please refer to Figure 4 , Figure 7 and Figure 8The cutting blade pusher plate 410 and the cutting blade 300 are connected by a first limiting mechanism. The first limiting mechanism includes a second protrusion 411 disposed on the side of the cutting blade pusher plate 410 near the cutting blade 300 and a second groove 330 disposed on the side of the cutting blade 300 near the cutting blade pusher plate 410. The second protrusion 411 and the second groove 330 cooperate. Therefore, when the cutting blade pusher plate 410 moves towards the output channel under the drive of the first spring 420, it pushes the cutting blade 300 to move together towards the output channel.

[0040] The specific details of the movement process of the cutting blade 300 in the mounting slot 200 are as follows:

[0041] The first spring 420 is always in a compressed state and drives the cutting blade pusher plate 410 to move towards the output channel, thereby pushing the cutting blades 300 together to move towards the output channel, so as to ensure that multiple cutting blades 300 in the mounting slot 200 can continuously enter the output channel. At the same time, the output channel is set to accommodate only one cutting blade 300 in the lateral direction. Therefore, multiple cutting blades 300 in the mounting slot 200 can continuously enter the output channel in turn.

[0042] In an optional embodiment, the drive device 500 includes a first straightening member 510, a second straightening member 520, and a second spring 530 connected to the bottom of the drill bit body 100. The second straightening member 520 includes a straightening block 521 and a pin 522 connected to the top of the straightening block 521. The bottom of the first straightening member 510 is provided with a mounting hole 004, and the pin 522 is inserted into the mounting hole 004. The second spring 530 is fitted onto the pin 522, and the top of the second spring 530 abuts against the bottom of the first straightening member 510. When the drill bit is working normally, the second spring 530 is compressed and stores force.

[0043] In an optional embodiment, the first straightening member 510 and the second straightening member 520 are slidably connected by a connecting mechanism; the connecting mechanism includes a longitudinal groove 005 disposed on the pin 522, a positioning hole 006 disposed on the first straightening member 510, and a first limiting pin 523 arranged laterally and passing through the groove 005 and the positioning hole 006.

[0044] The specific details of the movement process of the drive unit 500 are as follows:

[0045] The first limiting pin 523 can slide up and down in the longitudinal groove 005. When the drill bit is working normally, the straightening block 521 is resisted by the upward movement of the cutting material and approaches the bottom of the first straightening member 510. The first limiting pin 523 slides to the bottom of the longitudinal groove 005, and the second spring 530 is compressed by the pressure of the first straightening member 510 and the straightening block 521. When the drill bit is lifted, the straightening block 521 leaves the cutting material, the resistance to the straightening block 521 disappears, and it moves downward under the action of the second spring 530. When the first limiting pin 523 slides to the top of the longitudinal groove 005, the straightening block 521 stops moving downward.

[0046] In an optional embodiment, both the first straightening member 510 and the second straightening member 520 are provided with longitudinally penetrating channels, and these channels are part of the output channels. The output channel within the drill bit body 100 located below the mounting groove 200 is designated as the first channel 001, the output channel in the first straightening member 510 as the second channel 002, and the output channel in the second straightening member 520 as the third channel 003. The cutting blade 300 in the mounting groove 200 moves to the top of the first channel 001 and enters it under the push of the cutting blade pusher plate 410. It then moves vertically downwards through the first channel 001 and the second channel 002 before entering the third channel 003. The lowermost portion of the cutting blade 300 extends out of the second straightening member 520, thereby cutting the workpiece.

[0047] Preferably, the bottom of the straightening block 521 is set as an arc surface, and the third channel 003 is located at the lowest point of the arc surface. Its function is to reduce the wear on the bottom of the straightening block 521 during the cutting process.

[0048] In an optional embodiment, the drive device 500 further includes a second limiting mechanism. The second limiting mechanism includes a guide groove 350 disposed on the side of the cutting blade 300 near the cutting blade push plate 410 and an anti-tipping latch 600 disposed on the wall adjacent to the output channel and the guide groove 350. The anti-tipping latch 600 extends into the guide groove 350 and restricts the cutting blade 300 to move only downwards through a downwardly inclined limiting plate 610, thereby ensuring the normal operation of the cutting blade 300 and preventing the protruding part of the lowest cutting blade 300 from being pressed back into the output channel.

[0049] Please refer to Figures 8 to 10 The specific details regarding the shape and structure of the second limiting mechanism are as follows:

[0050] The anti-tipping latch 600 has a triangular cross-section and includes a base plate 620, a downwardly inclined limiting plate 610 located above the base plate 620, and a side plate connecting the base plate 620 and the limiting plate 610. The base plate 620 and the side plate are perpendicular to each other. The vertical distance between the opening 008 end of the limiting plate 610 and the side plate is equal to the length of the base plate 620, and then it continues to extend in a direction away from the side plate to form a protrusion. Furthermore, the first straightening member 510 and the straightening block 521 are provided with anti-tipping latch mounting grooves 009 on the adjacent wall surface of the guide groove 350, and the anti-tipping latch 600 is embedded in the anti-tipping latch mounting grooves 009. The guide groove 350 includes a downwardly inclined wall and a transverse wall connected below the inclined wall. The protrusion of the limiting plate 610 extends into the guide groove 350, thereby restricting the cutting blade 300 to move only downward.

[0051] Preferably, the limiting plate 610 has the same inclination angle as the inclined wall and the length of the protrusion is slightly less than the length of the inclined wall. This is because the inclined wall of the guide groove 350 presses on the protrusion and the two are arranged in parallel, which reduces the resistance of the protrusion to the cutting blade 300 so that the cutting blade 300 can move downward. Also, because the protrusion is inserted into the bottom of the guide groove 350, when the cutting blade 300 has an upward tendency, the protrusion intersects with the transverse wall and blocks the cutting blade 300 from moving upward.

[0052] In an optional embodiment, a third protrusion 340 is provided on the side of the cutting blade 300 away from the cutting blade pusher plate 410; a longitudinally extending third groove 007 is provided on the wall surface of the mounting groove 200 and the output channel adjacent to the third protrusion 340; the third protrusion 340 matches the third groove 007, thereby positioning the cutting blade 300 and preventing the cutting blade 300 from being misaligned in the lateral direction.

[0053] Furthermore, the third protrusion 340 of a cutting blade 300 arranged side by side in the mounting groove 200 matches the second groove 330 of another adjacent cutting blade 300, thereby aligning the multiple cutting blades 300 arranged side by side in the mounting groove 200 with each other and ensuring that the cutting blades 300 deviate when moving towards the output channel in the mounting groove 200.

[0054] In an optional embodiment, the mounting groove 200 and the first channel 001 are provided with an outlet on the side away from the central axis of the drill bit body 100. The cutting disc 300 can be installed in the mounting groove 200 and the first channel 001 through the outlet, and then a baffle 800 matching the shape of the outlet is installed on the outside of the mounting groove 200 and the first channel 001. The installation method can be welding or bolt connection.

[0055] In an optional embodiment, along the output direction of the cutting blade 300, the tenon and mortise structure includes a first protrusion 310 disposed near one of the input and output ends of the cutting blade 300, and a first groove 320 disposed near the other of the input and output ends of the cutting blade 300. The first protrusion 310 and the first groove 320 engage with each other to connect adjacent cutting blades 300, ensuring the continuity of the cutting blades 300 in the output channel.

[0056] In an optional embodiment, a plurality of cylindrical cutting posts 700 are welded circumferentially to the outer side of the drill bit body 100. The cutting posts 700 are inclinedly connected to the outer wall of the drill bit body 100, which can protect the drill bit body 100 and reduce the wear of the drill bit body 100.

[0057] In an optional embodiment, the upper part of the inner wall of the drill bit body 100 is provided with an internal thread 900, and the bottom of the upper drill tool is provided with an external thread. The upper drill tool and the drill bit body 100 are connected by threads.

[0058] The specific working process of the PDC drill bit's automatic cutting disc update 300 is explained below:

[0059] When the drill bit is operating normally, the straightening block 521 is subjected to upward pressure from the cutting material. The cutting blade 300, located at the lowest end of the output channel, extends out of the straightening block 521 and performs cutting. Simultaneously, the straightening block 521 moves upward and approaches the bottom of the first straightening member 510. The first limiting pin 523 slides to the bottom of the longitudinal groove 005, and the second spring 530 is compressed by the pressure of the first straightening member 510 and the straightening block 521. When the drill bit is lifted, the straightening block 521 moves away from the cutting material, the pressure on the straightening block 521 disappears, and the second spring 530 rebounds and tends to return to its original length. During this process, the second spring 530 pushes the straightening block 521. 21 moves downwards. When the first limiting pin 523 slides to the top of the longitudinal slide groove 005, the straightening block 521 stops moving. During this process, the cutting blade 300 at the bottom of the output channel drives the adjacent cutting blade 300 to move downwards through the tenon and mortise structure, and restricts the cutting blade 300 to only move downwards through the second limiting mechanism, thereby ensuring that multiple cutting blades 300 in the output channel move downwards continuously. When the cutting blade 300 in the mounting groove 200 enters the output channel, the first spring 420 pushes multiple cutting blades 300 to move towards the output channel through the cutting blade push plate 410, so that the cutting blades 300 in the mounting groove 200 continuously enter the output channel.

[0060] Therefore, the PDC drill bit with automatic chip replacement can automatically replace the chip 300 by lifting and pressing the drill bit during drilling, which can avoid the need to pull out of the drill bit due to wear and improve production efficiency.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A PDC drill bit with automatic composite refill, characterized in that: It includes a drill bit body (100), a mounting groove (200) disposed on the drill bit body (100), and a plurality of cutting blades (300) arranged side by side in the mounting groove (200); Below the mounting groove (200) is an output channel that extends longitudinally and communicates with the mounting groove (200), and adjacent cutting blades (300) are connected in the output channel by a tenon and mortise structure. It also includes a drive device (500) disposed at the bottom of the drill bit body (100), which is pressurized and stores power when the drill bit is working normally; When the drill bit is pulled up, the drive device (500) applies a downward pulling force to the cutting blade (300) to drive the cutting blade (300) to move down; It also includes a drive member (400) disposed in the mounting slot (200), the drive member (400) including a cutting blade pusher plate (410) and a first spring (420) located behind the plurality of cutting blades (300). The cutting blade push plate (410) and the mounting groove (200) are connected to the wall away from the output channel by the first spring (420); The first spring (420) is always in a compressed state and has a tendency to push the cutting blade pusher plate (410) toward the output channel; The cutting blade pusher plate (410) and the cutting blade (300) are connected by a first limiting mechanism. The first limiting mechanism includes a second protrusion (411) disposed on the cutting blade side of the cutting blade pusher plate (410) and a second groove (330) disposed on the cutting blade side of the cutting blade (300) near the cutting blade pusher plate. The second protrusion (411) and the second groove (330) cooperate. The drive device (500) includes a first straightening member (510), a second straightening member (520), and a second spring (530) connected to the bottom of the drill bit body (100). The second straightening component (520) includes a straightening block (521) and a pin (522) connected to the top of the straightening block (521). The first straightening component (510) has a mounting hole (004) at its bottom, and the pin (522) is inserted into the mounting hole (004). The second spring (530) is fitted onto the pin (522) and the top of the second spring (530) abuts against the bottom of the first straightening member (510); When the drill bit is working normally, the second spring (530) is compressed and stores force.

2. The PDC drill bit with automatically updating composite plates according to claim 1, characterized in that, The first straightening member (510) and the second straightening member (520) are slidably connected by a connecting mechanism; The connecting mechanism includes a longitudinal groove (005) disposed on the pin (522), a positioning hole (006) disposed on the first straightening member (510), and a first limiting pin (523) arranged laterally and passing through the groove (005) and the positioning hole (006).

3. The PDC drill bit with automatically updating composite plates according to claim 2, characterized in that, Both the first straightening member (510) and the second straightening member (520) are provided with a longitudinally penetrating channel, and the channel of the first straightening member (510) and the second straightening member (520) is part of the output channel.

4. The PDC drill bit with automatically updating composite plates according to claim 3, characterized in that, The drive device (500) further includes a second limiting mechanism, which includes a guide groove (350) disposed on the side of the cutting blade (300) near the cutting blade push plate and an anti-tipping latch (600) disposed on the wall adjacent to the output channel and the guide groove (350). The anti-tipping latch (600) extends into the guide groove (350) and restricts the cutting blade (300) to move only downwards by a downwardly inclined limiting plate (610).

5. The PDC drill bit with automatically updating composite plates according to claim 4, characterized in that, The anti-tipping latch (600) has a triangular cross-section. The anti-tipping latch (600) includes a base plate (620), a limiting plate (610) that is inclined downward above the base plate (620), and a side plate connected between the base plate (620) and the limiting plate (610). The base plate (620) and the side plate are perpendicular to each other. The vertical distance between the opening end of the limiting plate (610) and the side plate is equal to the length of the base plate (620), and then it continues to extend in a direction away from the side plate to form a protrusion. The guide channel (350) includes a downwardly inclined wall and a horizontal wall connected below the inclined wall; The limiting plate (610) extends into the guide groove (350).

6. The PDC drill bit with automatically updating composite plates according to claim 3, characterized in that, The cutting blade (300) has a third protrusion (340) on the side of the cutting blade pusher plate. The mounting groove (200) and the output channel are provided with a longitudinally extending third groove (007) on the wall surface adjacent to the third protrusion (340). The third protrusion (340) matches the third groove (007).

7. The PDC drill bit with automatically updating composite plates according to claim 1, characterized in that, Along the output direction of the cutting blade (300), the tenon structure includes a first protrusion (310) disposed near one of the input end and the output end of the cutting blade (300), and a first groove (320) disposed near the other of the input end and the output end of the cutting blade (300).

Images