Self-adjusting PDC (Polycrystalline Diamond Compact) drill bit

Abstract

The invention discloses a self-adjusting PDC drill bit, and relates to the technical field of petroleum. A hollow ring is fixedly mounted in the mounting frame, a clamping seat is rotatably mounted in the hollow ring, a drill bit body is fixedly arranged at the top of the clamping seat, and a hollow frame is fixedly mounted at the bottom of the mounting frame; the quick dismounting device is arranged in the mounting frame, the quick dismounting device comprises a drill bit blade, an automatic adjusting tool bit, a sliding rod, an arc-shaped triangular plate, a reset spring, a circular ring, a fixing rod, a push plate, an L-shaped plate and an elastic telescopic block, the drill bit body and the clamping seat enter the mounting frame along a hollow ring, then the drill bit body is rotated, and the drill bit body can be quickly dismounted; the drill bit body rotates to drive the clamping base to rotate, the clamping base rotates to make contact with the inclined face of the arc-shaped triangular plate, the arc-shaped triangular plate moves downwards to relieve limiting of the clamping base, and therefore a user can conveniently detach the drill bit body and replace the drill bit body.

Description

Technical Field

[0001] The invention relates to the field of petroleum technology, in particular to a self-adjusting PDC drill bit. Background Art

[0002] The self-adjusting PDC drill bit is optimized based on the traditional PDC drill bit, and some intelligent adjustment mechanisms are added to enable it to automatically adjust its working state according to the different characteristics of the formation to improve drilling efficiency and extend the life of the drill bit.

[0003] The patent with patent announcement number CN113216863B relates to an intelligent drilling pressure adaptive diamond PDC drill bit, including a PDC drill bit body, a drill bit blade is arranged on the top of the front end of the PDC drill bit body, a plurality of fixed blades are arranged on the top of the right end of the drill bit blade, four fixing holes are arranged on the bottom of the right end of the drill bit blade, a sliding cavity is arranged inside the drill bit blade, a sliding block is arranged inside the sliding cavity, four protrusions A are arranged on the right end of the sliding block, movable blocks are arranged on the right ends of the four baffles, threaded holes are arranged on the right ends of the four movable blocks, movable blades are arranged on the right ends of the four movable blades, bolts are arranged on the left ends of the four connecting columns, and protrusions B are arranged on the left ends of the four connecting columns, and the four protrusions A are matched with the four protrusions B respectively, so that the PDC drill bit can adjust the drill bit cutting blade, and the four bolts are threadedly connected with the four threaded holes respectively, so that the device is convenient for replacing the movable blade. In the above patent, the PDC drill bit can adjust the drill cutting blade by matching the four protrusions A with the four protrusions B respectively, and the device is convenient for replacing the movable cutter head by threading the four bolts with the four threaded holes respectively. However, the replacement of the movable cutter head is too cumbersome and not convenient for quick disassembly, which affects the replacement efficiency. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a self-adjusting PDC drill bit, which solves the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a self-adjusting PDC drill bit, comprising: a mounting frame; a hollow ring fixedly installed inside the mounting frame. A holder is rotatably installed inside the hollow ring, a drill body is fixedly installed on the top of the holder, and a hollow frame is fixedly installed on the bottom of the mounting frame; a quick disassembly device, the quick disassembly device is arranged inside the mounting frame, the quick disassembly device includes a drill blade, an automatically adjusting cutter head, a sliding rod, an arc-shaped triangular plate, a reset spring, a circular ring, a fixed rod, a push plate, an L-shaped plate and an elastic telescopic block, by moving the drill body and the holder along the hollow ring into the interior of the mounting frame, and then rotating the drill body, the rotation of the drill body will drive the holder to rotate, and the rotation of the holder will contact the inclined surface of the arc-shaped triangular plate, the drill blade is arranged on the outer wall of the drill body, and the automatic adjustment The section cutter head is arranged on the surface of the drill blade, the sliding rod is slidably installed inside the mounting frame, the arc-shaped triangular plate is fixedly installed on the top of the sliding rod, the reset spring is sleeved on the surface of the sliding rod, the circular ring is fixedly installed on the bottom of the sliding rod, the fixed rod is fixedly installed on the circumferential surface of the circular ring, the push plate is fixedly installed on the side of the fixed rod away from the circular ring, the L-shaped plate is fixedly installed on the bottom of the fixed rod, and the elastic telescopic block is fixedly installed on the bottom of the inner wall of the hollow frame. When the drill body needs to be replaced, the push plate is pushed downward, and the downward movement of the push plate will drive the fixed rod to move downward, and the downward movement of the fixed rod will drive the sliding rod and the arc-shaped triangular plate to move downward.

[0006] According to the above technical solution, the L-shaped plate is arranged above the elastic telescopic block, and a No. 1 spring is arranged between the fixing rod and the hollow frame, and the fixing rod is driven to reset by the No. 1 spring.

[0007] According to the above technical scheme, an anti-shake device for supporting the card seat is provided on the elastic telescopic block, and a supporting device is provided on the anti-shake device. The anti-shake device includes a sliding long rod, a fixed frame, a connecting plate, a connecting seat, a rotating plate and a limiting plate. When the card seat moves downward, the sliding long rod will be pushed to move downward, and the downward movement of the sliding long rod will drive the fixed frame to move downward. The downward movement of the fixed frame will push the rotating plate to move toward the direction close to the sliding long rod. The sliding long rod is slidably installed inside the mounting frame, and the fixed frame is fixedly installed on the circumferential surface of the sliding long rod. The connecting plate is fixedly installed on the top of the free end of the elastic telescopic block, and the connecting seat is fixedly installed on the end of the connecting plate away from the free end of the elastic telescopic block. The rotating plate is rotatably installed on the inner wall of the connecting seat, and the limiting plate is fixedly installed on the inner wall of the connecting seat.

[0008] According to the above technical scheme, a short plate is fixedly installed on the circumferential surface of the sliding long rod, a groove is opened inside the mounting frame, a rotating seesaw is rotatably installed on the inner wall of the groove, a universal pulley frame is slidably installed inside the mounting frame, a connecting rope is fixedly installed on the top of the short plate, and one end of the connecting rope away from the short plate is fixedly installed on the bottom of the rotating seesaw, and the downward rotation of one end of the rotating seesaw will drive the other end of the rotating seesaw to rotate upward, and the upward rotation of the other end of the rotating seesaw will push the universal pulley frame to move upward, and the upward movement of the universal pulley frame will push the card seat to move upward, and the bottom of the card seat is supported by the upward movement of the universal pulley frame.

[0009] According to the above technical solution, a No. 2 spring is arranged between the sliding long rod and the mounting frame, and the sliding long rod is driven by the No. 2 spring. A No. 1 torsion spring is arranged between the connecting seat and the rotating plate, and the rotating plate is driven to reset by the No. 1 torsion spring, and the limit plate is in contact with the surface of the rotating plate.

[0010] According to the above technical solution, a No. 2 torsion spring is arranged between the groove and the rotating seesaw, and the No. 2 torsion spring drives the rotating seesaw to reset. A No. 3 spring is arranged between the mounting frame and the universal pulley frame, and the No. 3 spring drives the universal pulley frame to reset.

[0011] According to the above technical scheme, the supporting device includes an L-shaped push rod, a trapezoidal block, an elastic telescopic plate and an arcuate clamping plate. The universal pulley frame moves upward to drive the L-shaped push rod to move upward. The upward movement of the L-shaped push rod will push the trapezoidal block to move in the direction close to the card seat. The movement of the trapezoidal block in the direction close to the card seat will drive the arcuate clamping plate to move in the direction close to the card seat. The L-shaped push rod is fixedly installed on the circumferential surface of the universal pulley frame, a square groove is opened on the surface of the hollow ring, the trapezoidal block is slidably installed on the bottom of the inner wall of the square groove, the elastic telescopic plate is fixedly installed on the bottom of the inner wall of the square groove, the arcuate clamping plate is fixedly installed on the side of the trapezoidal block away from the L-shaped push rod, and the free end of the elastic telescopic plate is fixedly installed on the surface of the arcuate clamping plate.

[0012] According to the above technical solution, a connecting block is fixedly installed on one side of the arc-shaped clamping plate close to the L-shaped push rod, an L-shaped rod is fixedly installed on the bottom of the connecting block, and a triangular block is fixedly installed on one side of the L-shaped rod away from the connecting block. The movement of the arc-shaped clamping plate toward the direction close to the clamping seat will drive the connecting block to move toward the direction close to the clamping seat, and the movement of the connecting block toward the direction close to the clamping seat will drive the L-shaped rod to move toward the direction close to the clamping seat.

[0013] According to the above technical solution, the L-shaped push rod is arranged below the trapezoidal block, and a No. 4 spring is arranged between the trapezoidal block and the square groove, and the trapezoidal block is reset by the No. 4 spring.

[0014] According to the above technical solution, the arc-shaped clamping plate contacts with the surface of the card seat, the card seat is supported by the arc-shaped clamping plate, and the triangular block contacts with the surface of the card seat.

[0015] The present invention provides a self-adjusting PDC drill bit. It has the following beneficial effects: (1) In the present invention, the resetting of the sliding rod will drive the resetting of the arc-shaped triangular plate, which will limit the holder to prevent the drill body from falling during use and affecting normal use. At the same time, the downward movement of the arc-shaped triangular plate will release the limit on the holder, making it convenient for the user to disassemble the drill body for replacement. When the L-shaped plate is separated from the free end of the elastic telescopic block, the free end of the elastic telescopic block will limit the L-shaped plate, eliminating the need to push the push plate all the time, thereby improving the practicality of the equipment.

[0016] (2) In the present invention, the movement of the connecting plate toward the direction of the sliding long rod will drive the elastic telescopic block to release the limit on the L-shaped plate, so that the sliding rod is reset under the elastic force of the reset spring, thereby preventing the L-shaped plate from being continuously stuck by the elastic telescopic block after the drill body is replaced, thereby affecting the limit of the arc-shaped triangular plate on the holder. At the same time, the upward movement of the universal pulley frame will push the holder to move upward, and the upward movement of the universal pulley frame will support the bottom of the holder, thereby preventing a large gap between the holder and the mounting frame and the hollow ring, thereby affecting the stability of the equipment during operation.

[0017] (3) The invention clamps the holder by moving the arc-shaped clamping plate toward the holder, thereby improving the stability of the holder and preventing the drill body from shaking during use, which may cause the drill body to be easily damaged. At the same time, the L-shaped rod moving toward the holder will drive the triangular block to move toward the holder, and the triangular block moving toward the holder will push the holder downward to prevent the holder from being stuck inside the hollow ring, which will cause the holder to be unable to rotate and affect the limiting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall cross-sectional structure of the present invention; Figure 3 This is a schematic diagram of the structure of the quick disassembly device of the present invention; Figure 4 It is a schematic diagram of the structure of the anti-shake device of the present invention; Figure 5 For the present invention Figure 4 A schematic diagram of the structure enlargement of part A; Figure 6 For the present invention Figure 4 A schematic diagram of the structure of part B in the middle is enlarged; Figure 7 It is a schematic diagram of the cross-sectional structure of the hollow ring of the present invention.

[0019] In the figure: 1, mounting frame; 2, holder; 3, hollow ring; 4, drill body; 5, hollow frame; 6, drill blade; 7, automatic adjustment cutter head; 8, sliding rod; 9, arc-shaped triangular plate; 10, reset spring; 11, ring; 12, fixed rod; 13, push plate; 14, L-shaped plate; 15, elastic telescopic block; 161, sliding long rod; 162, fixed frame; 163, connecting plate; 164, connecting seat; 165, rotating plate; 166, limiting plate; 167, short plate; 168, connecting rope; 169, rotating seesaw; 1610, universal pulley frame; 171, L-shaped push rod; 172, trapezoidal block; 173, elastic telescopic plate; 174, arc-shaped clamping plate; 175, connecting block; 176, L-shaped rod; 177, triangular block. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] See also Figure 1-Figure 7 , one embodiment of the present invention is: a self-adjusting PDC drill bit, comprising: a mounting frame 1; a hollow ring 3 is fixedly installed inside the mounting frame 1, a holder 2 is rotatably installed inside the hollow ring 3, a drill body 4 is fixedly arranged on the top of the holder 2, and a hollow frame 5 is fixedly installed on the bottom of the mounting frame 1; a quick disassembly device, the quick disassembly device is arranged inside the mounting frame 1, and the quick disassembly device includes a drill blade 6, an automatic adjustment cutter head 7, a sliding rod 8, an arc-shaped triangular plate 9, a reset spring 10, a circular ring 11, a fixing rod 12, a push plate 13, an L-shaped plate 14 and an elastic telescopic block 15, which prevents the drill body 4 from falling off during use and affecting normal use. The drill blade 6 is provided It is placed on the outer wall of the drill body 4, the automatic adjusting cutter head 7 is arranged on the surface of the drill blade 6, the sliding rod 8 is slidably installed inside the mounting frame 1, the arc-shaped triangular plate 9 is fixedly installed on the top of the sliding rod 8, the reset spring 10 is sleeved on the surface of the sliding rod 8, the circular ring 11 is fixedly installed on the bottom of the sliding rod 8, the fixed rod 12 is fixedly installed on the circumferential surface of the circular ring 11, the push plate 13 is fixedly installed on the side of the fixed rod 12 away from the circular ring 11, the L-shaped plate 14 is fixedly installed on the bottom of the fixed rod 12, and the elastic telescopic block 15 is fixedly installed on the bottom of the inner wall of the hollow frame 5. The downward movement of the arc-shaped triangular plate 9 will release the limit on the holder 2, so that the user can easily disassemble the drill body 4 for replacement.

[0022] The L-shaped plate 14 is arranged above the elastic telescopic block 15 , and a No. 1 spring is arranged between the fixing rod 12 and the hollow frame 5 , and the fixing rod 12 is driven to reset by the No. 1 spring.

[0023] When this embodiment is working: the drill body 4 and the holder 2 are brought into the interior of the mounting frame 1 along the hollow ring 3, and then the drill body 4 is rotated. The rotation of the drill body 4 will drive the holder 2 to rotate. The rotation of the holder 2 will contact the inclined surface of the arc-shaped triangular plate 9. The holder 2 will push the arc-shaped triangular plate 9 to move downward. When the holder 2 is separated from the arc-shaped triangular plate 9, the arc-shaped triangular plate 9 loses its extrusion and will drive the sliding rod 8 to reset under the elastic force of the reset spring 10. The reset of the sliding rod 8 will drive the arc-shaped triangular plate 9 to reset. The reset of the arc-shaped triangular plate 9 will limit the holder 2 to prevent the drill body 4 from falling during use and affecting normal use. At the same time, when the drill body 4 needs to be replaced, the push plate 13 is pushed downward. The downward movement of the push plate 13 will drive the fixed rod 12 to move downward, and the downward movement of the fixed rod 12 will drive the sliding rod 8 and the arc-shaped triangular plate 9 to move downward. The downward movement of the arc-shaped triangular plate 9 will release the limit on the holder 2, so that the user can easily disassemble the drill body 4 for replacement. At the same time, the downward movement of the fixed rod 12 will drive the L-shaped plate 14 to move downward, and the downward movement of the L-shaped plate 14 will contact the free end of the elastic telescopic block 15, and the L-shaped plate 14 will push the free end of the elastic telescopic block 15 to shrink. When the L-shaped plate 14 is separated from the free end of the elastic telescopic block 15, the free end of the elastic telescopic block 15 will limit the L-shaped plate 14, and there is no need to push the push plate 13 all the time, thereby improving the practicality of the equipment.

[0024] See also Figure 1-Figure 7 On the basis of the above embodiment, in another embodiment of the present invention, an anti-shake device for supporting the holder 2 is provided on the elastic telescopic block 15, and a supporting device is provided on the anti-shake device. The anti-shake device includes a sliding long rod 161, a fixing frame 162, a connecting plate 163, a connecting seat 164, a rotating plate 165 and a limiting plate 166. The sliding long rod 161 is slidably installed inside the mounting frame 1, the fixing frame 162 is fixedly installed on the circumferential surface of the sliding long rod 161, the connecting plate 163 is fixedly installed on the top of the free end of the elastic telescopic block 15, the connecting seat 164 is fixedly installed on the end of the connecting plate 163 away from the free end of the elastic telescopic block 15, the rotating plate 165 is rotatably installed on the inner wall of the connecting seat 164, and the limiting plate 166 is fixedly installed on the inner wall of the connecting seat 164 to prevent the L-shaped plate 14 from being continuously stuck by the elastic telescopic block 15 after the drill body 4 is replaced, thereby affecting the limiting of the holder 2 by the arc-shaped triangular plate 9.

[0025] A short plate 167 is fixedly installed on the circumferential surface of the sliding long rod 161, a groove is opened inside the mounting frame 1, a rotating seesaw 169 is rotatably installed on the inner wall of the groove, a universal pulley frame 1610 is slidably installed inside the mounting frame 1, a connecting rope 168 is fixedly installed on the top of the short plate 167, and one end of the connecting rope 168 away from the short plate 167 is fixedly installed on the bottom of the rotating seesaw 169 to prevent a large gap between the base 2 and the mounting frame 1 and the hollow ring 3, which affects the stability of the equipment during operation.

[0026] A No. 2 spring is arranged between the sliding long rod 161 and the mounting frame 1, and the sliding long rod 161 is driven by the No. 2 spring. A No. 1 torsion spring is arranged between the connecting seat 164 and the rotating plate 165, and the rotating plate 165 is reset by the No. 1 torsion spring, and the limiting plate 166 is in contact with the surface of the rotating plate 165.

[0027] A No. 2 torsion spring is arranged between the groove and the rotating seesaw 169, and the rotating seesaw 169 is reset by the No. 2 torsion spring. A No. 3 spring is arranged between the mounting frame 1 and the universal pulley frame 1610, and the universal pulley frame 1610 is reset by the No. 3 spring.

[0028] The supporting device includes an L-shaped push rod 171, a trapezoidal block 172, an elastic expansion plate 173 and an arc-shaped clamping plate 174. The L-shaped push rod 171 is fixedly installed on the circumferential surface of the universal pulley frame 1610. A square groove is opened on the surface of the hollow ring 3. The trapezoidal block 172 is slidably installed at the bottom of the inner wall of the square groove. The elastic expansion plate 173 is fixedly installed at the bottom of the inner wall of the square groove. The arc-shaped clamping plate 174 is fixedly installed on a side of the trapezoidal block 172 away from the L-shaped push rod 171. The free end of the elastic expansion plate 173 is fixedly installed on the surface of the arc-shaped clamping plate 174. The clamping seat 2 is clamped by moving the arc-shaped clamping plate 174 in the direction close to the clamping seat 2, thereby improving the stability of the clamping seat 2 and preventing the drill body 4 from shaking during use, which may cause the drill body 4 to be easily damaged.

[0029] A connecting block 175 is fixedly installed on one side of the arc-shaped clamping plate 174 close to the L-shaped push rod 171, an L-shaped rod 176 is fixedly installed on the bottom of the connecting block 175, and a triangular block 177 is fixedly installed on one side of the L-shaped rod 176 away from the connecting block 175 to prevent the holder 2 from being stuck inside the hollow ring 3, causing the holder 2 to be unable to rotate and affecting the limiting effect.

[0030] The L-shaped push rod 171 is arranged below the trapezoidal block 172. A No. 4 spring is arranged between the trapezoidal block 172 and the square groove, and the trapezoidal block 172 is driven to reset by the No. 4 spring.

[0031] The arc-shaped clamping plate 174 contacts with the surface of the card holder 2 , and the card holder 2 is supported by the arc-shaped clamping plate 174 . The triangular block 177 contacts with the surface of the card holder 2 .

[0032] When the present embodiment is working, the downward movement of the clamping seat 2 will push the long sliding rod 161 to move downward, the downward movement of the long sliding rod 161 will drive the fixing frame 162 to move downward, the downward movement of the fixing frame 162 will push the rotating plate 165 to move in the direction close to the long sliding rod 161, the rotating plate 165 to move in the direction close to the long sliding rod 161 will drive the connecting seat 164 to move in the direction close to the long sliding rod 161, the connecting seat 164 to move in the direction close to the long sliding rod 161 will drive the connecting plate 163 to move in the direction close to the long sliding rod 161, the connecting plate 163 to move in the direction close to the long sliding rod 161 will drive the elastic telescopic block 15 to release the limit on the L-shaped plate 14, so that the sliding rod 8 is reset under the elastic force of the reset spring 10, to prevent the L-shaped plate 14 from being reset after the drill body 4 is replaced. The shaped plate 14 is continuously stuck by the elastic telescopic block 15, affecting the limiting position of the arc-shaped triangular plate 9 on the holder 2. At the same time, the downward movement of the sliding long rod 161 will drive the short plate 167 to move downward, and the downward movement of the short plate 167 will drive the connecting rope 168 to move downward. The downward movement of the connecting rope 168 will drive one end of the rotating seesaw 169 to rotate downward, and the downward rotation of one end of the rotating seesaw 169 will drive the other end of the rotating seesaw 169 to rotate upward, and the upward rotation of the other end of the rotating seesaw 169 will push the universal pulley frame 1610 to move upward, and the upward movement of the universal pulley frame 1610 will push the holder 2 to move upward. The bottom of the holder 2 is supported by the upward movement of the universal pulley frame 1610 to prevent a large gap between the holder 2 and the mounting frame 1 and the hollow ring 3, which will affect the stability of the equipment during operation.

[0033] The universal pulley frame 1610 moves upward to drive the L-shaped push rod 171 to move upward, and the upward movement of the L-shaped push rod 171 will push the trapezoidal block 172 to move in the direction close to the base 2, and the movement of the trapezoidal block 172 in the direction close to the base 2 will drive the arc clamping plate 174 to move in the direction close to the base 2, and the arc clamping plate 174 moves in the direction close to the base 2 to clamp the base 2, thereby improving the stability of the base 2 and preventing the drill body 4 from shaking during use, which may cause the drill body 4 to be easily damaged. The movement of plate 174 toward the direction close to the base 2 will drive the connecting block 175 toward the direction close to the base 2, the movement of connecting block 175 toward the direction close to the base 2 will drive the L-shaped rod 176 toward the direction close to the base 2, the movement of L-shaped rod 176 toward the direction close to the base 2 will drive the triangular block 177 toward the direction close to the base 2, the movement of triangular block 177 toward the direction close to the base 2 will push the base 2 to move downward, preventing the base 2 from being stuck inside the hollow ring 3, causing the base 2 to be unable to rotate and affecting the limiting effect.

[0034] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A self-adjusting PDC drill bit, characterized in that: include: A mounting frame (1); a hollow ring (3) is fixedly mounted inside the mounting frame (1), a holder (2) is rotatably mounted inside the hollow ring (3), a drill body (4) is fixedly mounted on the top of the holder (2), and a hollow frame (5) is fixedly mounted on the bottom of the mounting frame (1); A quick disassembly device, the quick disassembly device is arranged inside a mounting frame (1), the quick disassembly device comprises a drill blade (6), an automatic adjustment blade (7), a sliding rod (8), an arc-shaped triangular plate (9), a return spring (10), a circular ring (11), a fixing rod (12), a push plate (13), an L-shaped plate (14) and an elastic telescopic block (15), the drill blade (6) is arranged on the outer wall of a drill body (4), the automatic adjustment blade (7) is arranged on the surface of the drill blade (6), and the sliding rod (8) is slidably mounted on the mounting frame Inside the frame (1), the arc-shaped triangular plate (9) is fixedly mounted on the top of the sliding rod (8), the return spring (10) is sleeved on the surface of the sliding rod (8), the ring (11) is fixedly mounted on the bottom of the sliding rod (8), the fixed rod (12) is fixedly mounted on the circumferential surface of the ring (11), the push plate (13) is fixedly mounted on a side of the fixed rod (12) away from the ring (11), the L-shaped plate (14) is fixedly mounted on the bottom of the fixed rod (12), and the elastic telescopic block (15) is fixedly mounted on the bottom of the inner wall of the hollow frame (5); Wherein, an anti-shake device for supporting the card seat (2) is arranged on the elastic telescopic block (15), and a supporting device is arranged on the anti-shake device.

2. A self-adjusting PDC drill bit according to claim 1, characterized in that: The L-shaped plate (14) is arranged above the elastic telescopic block (15), and a No. 1 spring is arranged between the fixing rod (12) and the hollow frame (5).

3. A self-adjusting PDC drill bit according to claim 2, characterized in that: The anti-shake device comprises a sliding long rod (161), a fixing frame (162), a connecting plate (163), a connecting seat (164), a rotating plate (165) and a limiting plate (166); the sliding long rod (161) is slidably mounted inside the mounting frame (1); the fixing frame (162) is fixedly mounted on the circumferential surface of the sliding long rod (161); the connecting plate (163) is fixedly mounted on the top of the free end of the elastic telescopic block (15); the connecting seat (164) is fixedly mounted on an end of the connecting plate (163) away from the free end of the elastic telescopic block (15); the rotating plate (165) is rotatably mounted on the inner wall of the connecting seat (164); and the limiting plate (166) is fixedly mounted on the inner wall of the connecting seat (164).

4. A self-adjusting PDC drill bit according to claim 3, characterized in that: A short plate (167) is fixedly mounted on the circumferential surface of the sliding long rod (161); a groove is provided inside the mounting frame (1); a rotating seesaw (169) is rotatably mounted on the inner wall of the groove; a universal pulley frame (1610) is slidably mounted inside the mounting frame (1); a connecting rope (168) is fixedly mounted on the top of the short plate (167); and one end of the connecting rope (168) away from the short plate (167) is fixedly mounted on the bottom of the rotating seesaw (169).

5. A self-adjusting PDC drill bit according to claim 4, characterized in that: A No. 2 spring is provided between the sliding long rod (161) and the mounting frame (1), a No. 1 torsion spring is provided between the connecting seat (164) and the rotating plate (165), and the limiting plate (166) is in surface contact with the rotating plate (165).

6. A self-adjusting PDC drill bit according to claim 5, characterized in that: A No. 2 torsion spring is arranged between the groove and the rotating seesaw (169), and a No. 3 spring is arranged between the mounting frame (1) and the universal pulley frame (1610).

7. A self-adjusting PDC drill bit according to claim 6, characterized in that: The supporting device comprises an L-shaped push rod (171), a trapezoidal block (172), an elastic expansion plate (173) and an arc-shaped clamping plate (174); the L-shaped push rod (171) is fixedly mounted on the circumferential surface of the universal pulley frame (1610); a square groove is provided on the surface of the hollow ring (3); the trapezoidal block (172) is slidably mounted on the bottom of the inner wall of the square groove; the elastic expansion plate (173) is fixedly mounted on the bottom of the inner wall of the square groove; the arc-shaped clamping plate (174) is fixedly mounted on a side of the trapezoidal block (172) away from the L-shaped push rod (171); and the free end of the elastic expansion plate (173) is fixedly mounted on the surface of the arc-shaped clamping plate (174).

8. The self-adjusting PDC drill bit according to claim 7, characterized in that: A connecting block (175) is fixedly mounted on a side of the arc-shaped clamping plate (174) close to the L-shaped push rod (171), an L-shaped rod (176) is fixedly mounted on the bottom of the connecting block (175), and a triangular block (177) is fixedly mounted on a side of the L-shaped rod (176) away from the connecting block (175).

9. The self-adjusting PDC drill bit according to claim 8, characterized in that: The L-shaped push rod (171) is arranged below the trapezoidal block (172), and a No. 4 spring is arranged between the trapezoidal block (172) and the square groove.

10. The self-adjusting PDC drill bit according to claim 9, characterized in that: The arc-shaped clamping plate (174) contacts the surface of the clamping seat (2), and the triangular block (177) contacts the surface of the clamping seat (2).

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