PDC (Polycrystalline Diamond Compact) drill bit with adjustable aperture

Abstract

The utility model relates to the technical field of PDC (Polycrystalline Diamond Compact) drill bits, in particular to an aperture-adjustable PDC drill bit which comprises a shaft body, an annular seat for supporting is screwed on the surface of the top end of the shaft body, a plurality of groups of grooves are formed in the periphery of the annular seat, and claw teeth for drilling are hinged in the grooves through rotating shafts. A lantern ring used for supporting is installed on the peripheral surface of the shaft body in a screwed mode. When the PDC drill bit is used, the ring body on the periphery of the sleeve ring on the periphery of the shaft body can be utilized, so that the ring body moves on the periphery of the sleeve ring and drives the supporting plate to move through the lug block, and the supporting plate can push the claw teeth hinged to the periphery of the ring seat; and the claw teeth in the multiple sets of grooves in the periphery of the ring base can swing synchronously, so that the outer diameter of the PDC drill bit can be enlarged conveniently, the hole diameter of the drill bit during drilling can be increased, and adjustment can be conducted conveniently according to the use requirement.

Description

Technical Field

[0001] The utility model relates to the technical field of PDC drill bits, in particular to a PDC drill bit with adjustable aperture. Background Art

[0002] Polycrystalline diamond compact drill bits, or PDC drill bits for short, are made of polycrystalline diamond (thin discs) made into small cutting blocks embedded or sintered into the drill bit body. They are used in soft to medium-hard formations. Patent No. CN202323501615.6 discloses a PDC drill bit. The first gauge portion and the second gauge portion cooperate to form a stepped gauge structure with two different gauge sizes. This can balance stability and directional capability during drilling operations. However, since the aperture of the PDC drill bit is not easy to adjust, the PDC drill bit can only be replaced when drilling holes of different apertures is needed, which is very limited. To this end, we propose a PDC drill bit with adjustable aperture. Utility Model Content

[0003] In view of the problems in the prior art, the utility model provides a PDC drill bit with adjustable aperture.

[0004] The technical solution adopted by the present invention to solve the technical problem is a PDC drill bit with adjustable aperture, comprising a shaft body, a ring seat for support being screwedly mounted on the top surface of the shaft body, a groove being provided on the outer periphery of the ring seat, and a plurality of grooves being provided, claws for drilling holes being hinged in the groove via a rotating shaft, a collar for support being screwedly mounted on the outer periphery of the shaft body, a ring body for adjustment being slidably mounted on the outer periphery of the collar, and ear blocks for support being integrally constructed on the outer periphery of the ring block, and a plurality of ear blocks being provided, and a support plate for adjustment being hinged between the ear blocks and the claws via a rotating shaft;

[0005] The outer periphery of the shaft is provided with pin holes that are compatible with the ring seat, and there are multiple groups of pin holes. A cylinder for support is threadedly installed in the pin hole, and a sliding column for limiting is slidably installed in the cylinder. The inner periphery of the ring seat is provided with arc holes that match the sliding column, and there are multiple groups of arc holes. A spring for pushing the sliding column to move is assembled in the cylinder.

[0006] By adopting the above technical solution, when using a PDC drill bit, the ring body on the outer periphery of the shaft outer ring can be used to make the ring body move on the outer periphery of the ring and drive the support plate to move through the ear block, so that the support plate can push the claws hinged on the outer periphery of the ring seat, and because the support plate is hinged between the claws and the ear block, the claws in the multiple groups of grooves on the outer periphery of the ring seat can swing synchronously, thereby facilitating the expansion of the outer diameter of the PDC drill bit, and the hole diameter when the drill bit is drilling can be increased, and it is convenient to adjust according to the needs during use;

[0007] When the ring seat is screwed and installed on the outer periphery of the shaft, after the ring seat is screwed into the appropriate position, the spring inside the cylinder in the pin hole inside the shaft can push the sliding column, so that one end of the sliding column can extend out of the cylinder and be plugged into the arc hole on the inner periphery of the ring seat, which is convenient for limiting and fixing the position of the ring seat screwed on the outer periphery of the shaft, thereby improving the stability of the ring seat and claw teeth when installed on the outer periphery of the shaft, making it possible to operate more stably, and then the support plate is installed between the claw teeth and the ear block to use the drill bit, and the ring seat and claw teeth can also be disassembled and assembled separately for easy replacement.

[0008] Specifically, a sleeve abutting against the ring seat is screwed on the top surface of the shaft body, and teeth for assisting drilling are integrally constructed on the outer peripheral surface of the sleeve, and there are multiple groups of teeth.

[0009] By adopting the above technical solution, when the PDC drill bit is used, the shell can be screwed onto the outer periphery of the shaft and assist in limiting the ring seat, so that the ring seat can operate more stably. At the same time, the multiple groups of teeth on the outer periphery of the shell can cooperate during drilling, which is convenient for assisting during drilling, thereby improving the stability of the drill bit during drilling.

[0010] Specifically, the outer peripheral surface of the sleeve and the top surface of the shaft body are both provided with liquid outlet holes, and there are multiple groups of liquid outlet holes.

[0011] By adopting the above technical solution, the liquid outlet holes on the outer periphery of the sleeve are matched with the liquid outlet holes on the outer periphery of the shaft, which is convenient for auxiliary spraying of lubricating or cooling liquid when the drill bit is drilling.

[0012] Specifically, the outer peripheral surface of the collar is provided with arc grooves, and there are multiple groups of arc grooves. The inner peripheral surface of the ring body is integrally constructed with arc strips that fit with the arc grooves, and there are multiple groups of arc strips.

[0013] By adopting the above technical solution, the arc groove on the outer periphery of the ring fits with the arc strip on the inner periphery of the ring body, which facilitates improving the stability of the ring body when it slides on the outer periphery of the ring body, allowing the ring body to operate more stably.

[0014] Specifically, an inserting hole connected to the arc-shaped hole is provided on the inner bottom surface of the groove.

[0015] By adopting the above technical solution, when the ring seat at the top of the shaft body needs to be disassembled and assembled, the sliding column can be pushed with the corresponding tool through the socket in the groove, so that the sliding column can be separated from the arc hole and retracted into the cylinder, so that the ring seat can be rotated and disassembled and replaced.

[0016] Specifically, the outer peripheral surface of the shaft, the outer peripheral surface of the collar and the outer peripheral surface of the ring are all provided with screw holes, and there are multiple groups of screw holes, and screw pins for fastening are threadedly installed in the screw holes.

[0017] By adopting the above technical solution, after adjusting the position of the outer ring body of the ring, the screw pin and the screw hole can be screwed together to facilitate limiting and fixing the position of the outer ring body of the ring, and the adjusted position of the outer claw teeth of the ring seat can be locked, so that the claw teeth can be used stably during drilling.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The technical solution of the present application, through the design of the ring seat, grooves, claws, collar, ring body, ear block and support plate, can utilize the ring body on the outer periphery of the collar on the outer periphery of the shaft when using the PDC drill bit, so that the ring body moves on the outer periphery of the collar and drives the support plate to move through the ear block, so that the support plate can push the claws hinged on the outer periphery of the ring seat, and because the support plate is hinged between the claws and the ear block, the claws in the multiple groups of grooves on the outer periphery of the ring seat can swing synchronously, thereby facilitating the expansion of the outer diameter of the PDC drill bit, and increasing the aperture when the drill bit is drilling, and conveniently adjusting according to the needs during use.

[0020] 2. The technical solution of the present application is designed with a pin hole, a cylinder, a sliding column, a spring and an arc-shaped hole. When the ring seat is screwed into the outer periphery of the shaft, the spring inside the cylinder in the pin hole inside the shaft can push the sliding column after the ring seat is screwed into the appropriate position, so that one end of the sliding column can extend out of the cylinder and be plugged into the arc-shaped hole on the inner periphery of the ring seat, which is convenient for limiting and fixing the position of the ring seat screwed into the outer periphery of the shaft, thereby improving the stability of the ring seat and the claw teeth when they are installed on the outer periphery of the shaft, making it possible to operate more stably. Then, the support plate is installed between the claw teeth and the ear block to use the drill bit. At the same time, the ring seat and the claw teeth can also be disassembled and assembled separately for easy replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is a schematic plan view of the shaft structure of the present utility model;

[0023] Figure 2 It is a schematic plan view of the connection structure between the sleeve and the ring body of the utility model;

[0024] Figure 3 It is a schematic plan view of the connection structure between the claws and the ring seat of the utility model;

[0025] Figure 4 This is a schematic diagram of the support plate structure of the present utility model;

[0026] In the figure: 1. shaft; 2. ring seat; 3. groove; 4. claw; 5. collar; 6. ring body; 7. ear block; 8. support plate; 9. screw hole; 10. screw pin; 11. pin hole; 12. cylinder; 13. slide column; 14. arc hole; 15. spring; 16. socket; 17. housing; 18. teeth; 19. arc groove; 20. arc strip; 21. liquid outlet. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0028] See also Figure 1-4 The embodiment of the utility model provides a technical solution: a PDC drill bit with adjustable aperture, comprising a shaft body 1, a ring seat 2 for support being screwed onto the top surface of the shaft body 1, and a groove 3 being formed on the outer periphery of the ring seat 2, and the groove 3 has multiple groups, and claw teeth 4 for drilling holes are hingedly connected to the groove 3 via a rotating shaft, a collar 5 for support being screwed onto the outer periphery of the shaft body 1, and a ring body 6 for adjustment being slidably mounted on the outer periphery of the collar 5, and an ear block 7 for support being integrally constructed on the outer periphery of the ring body 6. There are multiple groups of ear blocks 7, and a support plate 8 for adjustment is hinged between the ear block 7 and the claw tooth 4 through a rotating shaft; the outer periphery of the shaft body 1 is provided with a pin hole 11 that is compatible with the ring seat 2, and there are multiple groups of pin holes 11. A cylinder 12 for support is screwed into the pin hole 11, and a sliding column 13 for limiting is slidably installed in the cylinder 12. An arc hole 14 that fits with the sliding column 13 is provided on the inner periphery of the ring seat 2, and there are multiple groups of arc holes 14. A spring 15 for pushing the sliding column 13 to move is assembled in the cylinder 12.

[0029] When the PDC drill bit is in use, the ring body 6 on the outer periphery of the collar 5 on the outer periphery of the shaft body 1 can be used to move the ring body 6 on the outer periphery of the collar 5 and drive the support plate 8 to move through the ear block 7, so that the support plate 8 can push the claws 4 hinged on the outer periphery of the ring seat 2. Since the support plate 8 is hinged between the claws 4 and the ear block 7, the claws 4 in the multiple groups of grooves 3 on the outer periphery of the ring seat 2 can swing synchronously, thereby facilitating the expansion of the outer diameter of the PDC drill bit and the increase of the hole diameter when the drill bit is drilling, and conveniently adjusting according to the needs during use;

[0030] When the ring seat 2 is screwed and installed on the outer periphery of the shaft body 1, after the ring seat 2 is screwed into the appropriate position, the spring 15 inside the cylinder 12 in the pin hole 11 inside the shaft body 1 can push the slide post 13, so that one end of the slide post 13 can extend out of the cylinder 12 and be plugged into the arc-shaped hole 14 on the inner periphery of the ring seat 2, which is convenient for limiting and fixing the position of the ring seat 2 screwed and installed on the outer periphery of the shaft body 1, thereby improving the stability of the ring seat 2 and the claw teeth 4 when installed on the outer periphery of the shaft body 1, making it possible to operate more stably, and then the support plate 8 is installed between the claw teeth 4 and the ear block 7 to use the drill bit. At the same time, the ring seat 2 and the claw teeth 4 can also be disassembled and assembled separately, which is convenient for replacement.

[0031] like Figure 1 and Figure 3 As shown, a sleeve 17 is screwed on the top surface of the shaft body 1 and abuts against the ring seat 2 , and teeth 18 for assisting drilling are integrally constructed on the outer peripheral surface of the sleeve 17 , and there are multiple groups of teeth 18 .

[0032] When in use, when the PDC drill bit is used, the sleeve 17 can be screwed onto the outer periphery of the shaft 1 and assist in limiting the ring seat 2, so that the ring seat 2 can operate more stably. At the same time, the multiple groups of teeth 18 on the outer periphery of the sleeve 17 can cooperate during drilling, which is convenient for assisting during drilling, thereby improving the stability of the drill bit during drilling.

[0033] like Figure 3 As shown, the outer surface of the sleeve 17 and the top surface of the shaft body 1 are both provided with liquid outlet holes 21 , and there are multiple groups of liquid outlet holes 21 .

[0034] When in use, the liquid outlet holes 21 on the outer periphery of the sleeve 17 are matched with the liquid outlet holes 21 on the outer periphery of the shaft body 1, so as to assist in spraying lubricating or cooling liquid when the drill bit is drilling.

[0035] like Figure 2 As shown, the outer surface of the collar 5 is provided with arc grooves 19, and there are multiple groups of arc grooves 19. The inner surface of the ring body 6 is integrally constructed with arc strips 20 that fit with the arc grooves 19, and there are multiple groups of arc strips 20.

[0036] When in use, the arc groove 19 on the outer periphery of the collar 5 and the arc strip 20 on the inner periphery of the ring body 6 fit together, which is convenient for improving the stability of the ring body 6 when sliding on the outer periphery of the collar 5, so that the ring body 6 can operate more stably.

[0037] like Figure 1 As shown, an insertion hole 16 communicating with the arc-shaped hole 14 is formed on the inner bottom surface of the groove 3 .

[0038] During use, when the ring seat 2 on the top of the shaft body 1 needs to be disassembled and assembled, the slide post 13 can be pushed with a corresponding tool through the socket 16 in the groove 3, so that the slide post 13 can be separated from the arc hole 14 and retracted into the cylinder 12, so that the ring seat 2 can be rotated and disassembled and replaced.

[0039] like Figure 1 and Figure 2 As shown, screw holes 9 are provided on the outer peripheral surfaces of the shaft body 1 , the outer peripheral surfaces of the collar 5 and the outer peripheral surfaces of the ring body 6 , and there are multiple groups of screw holes 9 , in which screw pins 10 for tightening are screwed.

[0040] During use, after adjusting the position of the outer ring body 6 of the collar 5, the screw pin 10 and the screw hole 9 can be screwed together to facilitate limiting and fixing the position of the outer ring body 6 of the collar 5, and the adjusted position of the outer claw teeth 4 of the ring seat 2 can be locked, so that the claw teeth 4 can be used stably during drilling.

[0041] The working principle and use process of the present invention are as follows: when in use, first install the corresponding structural components in the appropriate position. When the PDC drill bit is used, the ring body 6 on the outer periphery of the collar 5 of the shaft body 1 can be used to make the ring body 6 move on the outer periphery of the collar 5 and drive the support plate 8 to move through the ear block 7, so that the support plate 8 can push the claws 4 hinged on the outer periphery of the ring seat 2. Moreover, since the support plate 8 is hinged between the claws 4 and the ear block 7, the claws 4 in the multiple groups of grooves 3 on the outer periphery of the ring seat 2 can swing synchronously. After adjusting the swing angle of the claws 4, the screw pin 10 can be screwed together with the screw holes 9 on the outer periphery of the ring body 6 to be connected, which not only can assist in fixing the ring body 6 on the outer periphery of the collar 5, but also can lock the angle of the claws 4 after swinging, thereby facilitating the expansion of the outer diameter of the PDC drill bit and increasing the hole diameter when the drill bit is drilling, and is convenient to adjust according to the needs during use. At the same time, when the ring seat 2 is screwed on the outer periphery of the shaft body 1, the ring seat 2 screw When the ring seat 2 at the top of the shaft body 1 needs to be disassembled and assembled, the slide post 13 can be pushed by a corresponding tool through the insertion hole 16 in the groove 3, so that the slide post 13 can be separated from the arc hole 14 and retracted into the cylinder 12, so that the ring seat 2 can be rotated and disassembled and replaced, so that the PDC drill bit can be used more stably during drilling.

[0042] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A PDC drill bit with adjustable aperture, characterized in that: The invention comprises a shaft body (1), a ring seat (2) for support is screwed on the top surface of the shaft body (1), a groove (3) is provided on the outer periphery of the ring seat (2), and there are multiple groups of grooves (3), claw teeth (4) with holes are hinged in the groove (3) via a rotating shaft, a sleeve ring (5) for support is screwed on the outer periphery of the shaft body (1), a ring body (6) for adjustment is slidably installed on the outer periphery of the sleeve ring (5), and an ear block (7) for support is integrally constructed on the outer periphery of the ring body (6), and there are multiple groups of ear blocks (7), and a support plate (8) for adjustment is hinged between the ear block (7) and the claw teeth (4) via a rotating shaft; The outer periphery of the shaft body (1) is provided with a pin hole (11) adapted to the ring seat (2), and the pin hole (11) is provided in a plurality of groups. A cylinder (12) for supporting is screwedly installed in the pin hole (11), and a slide column (13) for limiting is slidably installed in the cylinder (12). The inner periphery of the ring seat (2) is provided with an arc hole (14) adapted to the slide column (13), and the arc hole (14) is provided in a plurality of groups. A spring (15) for pushing the slide column (13) to move is assembled in the cylinder (12).

2. The PDC drill bit with adjustable aperture according to claim 1, characterized in that: The top surface of the shaft body (1) is screwed with a sleeve (17) that abuts against the ring seat (2), and the outer peripheral surface of the sleeve (17) is integrally constructed with teeth (18) for auxiliary drilling, and the teeth (18) are multiple groups.

3. The PDC drill bit with adjustable aperture according to claim 2, characterized in that: Liquid outlet holes (21) are provided on the outer peripheral surface of the sleeve (17) and the top surface of the shaft body (1), and there are multiple groups of liquid outlet holes (21).

4. The PDC drill bit with adjustable hole diameter according to claim 1, characterized in that: The outer peripheral surface of the collar (5) is provided with arc grooves (19), and there are multiple groups of arc grooves (19); the inner peripheral surface of the ring body (6) is integrally constructed with arc strips (20) that match the arc grooves (19), and there are multiple groups of arc strips (20).

5. The PDC drill bit with adjustable hole diameter according to claim 1, characterized in that: The inner bottom surface of the groove (3) is provided with an insertion hole (16) which is connected to the arc-shaped hole (14).

6. The PDC drill bit with adjustable hole diameter according to claim 1, characterized in that: The outer peripheral surface of the shaft body (1), the outer peripheral surface of the collar (5) and the outer peripheral surface of the ring body (6) are all provided with screw holes (9), and there are multiple groups of screw holes (9). Screw pins (10) for tightening are screwed in the screw holes (9).

Images