PDC drill bit capable of preventing nozzle from being blocked

Abstract

The utility model discloses a PDC drill bit capable of preventing a nozzle from being blocked, and relates to the technical field of PDC drill bits capable of preventing the nozzle from being blocked, the problem that the PDC drill bit is inconvenient to clean is solved, the PDC drill bit comprises a drill bit body, a self-cleaning mechanism and an adjusting mechanism, and the self-cleaning mechanism is slidably connected to the inner wall of the drill bit body; the adjusting mechanism is fixedly connected to the outer surface of the self-cleaning mechanism, the self-cleaning mechanism comprises a sealing plate slidably connected to the inner wall of the drill bit body, and the adjusting mechanism comprises a connecting rod fixedly connected to the lower surface of the sealing plate. The positions of the first through hole and the second through hole can be conveniently adjusted by rotating the rotary knob, so that water is conveniently controlled to be sprayed out from the first nozzle or the second nozzle, the situation that the drill bit body cannot be used when one group of nozzles are blocked is conveniently prevented, and meanwhile, the other group of nozzles are conveniently washed.

Description

Technical Field

[0001] The utility model relates to the technical field of a PDC drill bit capable of preventing nozzle clogging, in particular to a PDC drill bit capable of preventing nozzle clogging. Background Art

[0002] In the current oil and gas exploration and mining industry, PDC drill bits are widely used in drilling operations due to their high hardness, high wear resistance and high efficiency. PDC drill bits usually include a group of orderly arranged water nozzles. The main function of these water nozzles is to supply necessary coolant to the drilling surface and help remove the cuttings formed during cutting. The smooth operation of the nozzles is essential to maintaining the cutting efficiency of the drill bit and preventing overheating damage.

[0003] However, in actual use, nozzle clogging still occurs frequently. The main reasons include nozzle clogging caused by cuttings, solid particles in the mud system and chemical deposits. Once this happens, the drilling operation must be stopped and the drill bit must be extracted from the borehole for cleaning and maintenance, which not only consumes a lot of time but also increases operating costs. Therefore, there is a problem of inconvenience in cleaning the PDC drill bit. Utility Model Content

[0004] 1. Technical issues to be solved

[0005] In view of the above problems existing in the prior art, the utility model provides a PDC drill bit which can prevent nozzle clogging.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the utility model is implemented through the following technical solutions: a PDC drill bit for preventing nozzle clogging, comprising a drill bit body, a self-cleaning mechanism and an adjusting mechanism, the self-cleaning mechanism being slidably connected to the inner wall of the drill bit body, the adjusting mechanism being fixedly connected to the outer surface of the self-cleaning mechanism, the self-cleaning mechanism comprising a sealing plate slidably connected to the inner wall of the drill bit body, the adjusting mechanism comprising a connecting rod fixedly connected to the lower surface of the sealing plate, the self-cleaning mechanism also comprising a first nozzle and a second nozzle opened on the outer surface of the drill bit body, the lower ends of the first nozzle and the second nozzle being in contact with the upper surface of the sealing plate, the lower surface of the connecting rod being fixedly connected to a worm gear, and the outer surface of the worm gear being meshingly connected to a worm.

[0008] As a preferred solution of the PDC drill bit for preventing nozzle clogging of the utility model, a second through hole is opened on the upper surface of the sealing plate at a position corresponding to the first nozzle, and the outer surface of the second through hole is connected to the lower end of the first nozzle.

[0009] By adopting the above technical solution, the water source can be easily sprayed out from the first nozzle through the first through hole.

[0010] As a preferred solution of the PDC drill bit for preventing nozzle clogging of the utility model, a first through hole is opened on the upper surface of the sealing plate at a position corresponding to the second nozzle, and the first through hole and the first nozzle are staggered.

[0011] By adopting the above technical solution, it is easy to prevent a situation in which a drill bit body cannot be used due to clogging of one set of nozzles, and it is easy to flush the other set of nozzles.

[0012] As a preferred solution of the PDC drill bit for preventing nozzle clogging described in the utility model, a limit ring is fixedly connected to the inner wall of the drill bit body, and the upper surface of the limit ring is slidably connected to the lower surface of the sealing plate.

[0013] By adopting the above technical solution, it is not convenient to limit the sealing plate by the limiting ring, so that the sealing plate can stably rotate on the inner wall of the drill body.

[0014] As a preferred solution of the PDC drill bit for preventing nozzle clogging of the utility model, one end of the worm is rotatably connected to the inner wall of the drill bit body, and the other end of the worm passes through the outer surface of the drill bit body and is fixedly connected to a knob.

[0015] By adopting the above technical solution, the positions of the first through hole and the second through hole can be adjusted by turning the knob, thereby facilitating the control of water spraying from the first nozzle or the second nozzle.

[0016] As a preferred solution of the PDC drill bit for preventing nozzle clogging of the utility model, the outer surface of the worm and the outer surface of the drill bit body are sealed by a sealing gasket and a sealing ring.

[0017] By adopting the above technical solution and using a sealing pad and a sealing ring, effective sealing can be maintained when the worm rotates, so that the worm can rotate on the outer surface of the drill body without liquid flowing out during rotation.

[0018] (III) Beneficial effects

[0019] The utility model provides a PDC drill bit that prevents nozzle clogging and has the following beneficial effects:

[0020] 1. By turning the knob, the positions of the first through hole and the second through hole can be adjusted, so as to control the water to be sprayed from the first nozzle or the second nozzle, so as to prevent the drill body from being unusable when one set of nozzles is blocked, and at the same time, the other set of nozzles can be flushed.

[0021] 2. Turn the knob. The rotation of the knob drives the worm to rotate. The rotation of the worm drives the worm wheel to rotate. The rotation of the worm wheel drives the connecting rod to rotate. Then the connecting rod drives the sealing plate to rotate, so as to adjust the angle between the first through hole and the second nozzle, and the angle between the first nozzle and the second through hole, so as to adjust the water output of the first nozzle and the second nozzle, and adjust the water output speed of the first nozzle and the second nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0024] Figure 2 It is a front cross-sectional structural schematic diagram of the entire utility model.

[0025] Figure 3 It is a schematic diagram of the overall top cross-sectional structure of the utility model.

[0026] Figure 4 It is a structural schematic diagram of the sealing plate in the present invention.

[0027] In the figure, 1. drill body; 2. self-cleaning mechanism; 201. first nozzle; 202. second nozzle; 203. sealing plate; 204. first through hole; 205. limiting ring; 206. second through hole; 3. adjusting mechanism; 301. knob; 302. worm; 303. worm wheel; 304. connecting rod;. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0029] Example 1

[0030] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4, is the first embodiment of the utility model, which provides a PDC drill bit for preventing nozzle clogging, including a drill bit body 1, a self-cleaning mechanism 2 and an adjusting mechanism 3, the self-cleaning mechanism 2 is slidably connected to the inner wall of the drill bit body 1, the adjusting mechanism 3 is fixedly connected to the outer surface of the self-cleaning mechanism 2, the self-cleaning mechanism 2 includes a sealing plate 203 slidably connected to the inner wall of the drill bit body 1, the adjusting mechanism 3 includes a connecting rod 304 fixedly connected to the lower surface of the sealing plate 203, the self-cleaning mechanism 2 also includes a first nozzle 201 and a second nozzle 202 opened on the outer surface of the drill bit body 1, and the lower ends of the first nozzle 201 and the second nozzle 202 are in contact with the upper surface of the sealing plate 203.

[0031] Specifically, a second through hole 206 is opened on the upper surface of the sealing plate 203 at a position corresponding to the first nozzle 201, and the outer surface of the second through hole 206 is connected to the lower end of the first nozzle 201. A first through hole 204 is opened on the upper surface of the sealing plate 203 at a position corresponding to the second nozzle 202, and the first through hole 204 and the first nozzle 201 are staggered. The inner wall of the drill body 1 is fixedly connected to a limiting ring 205, and the upper surface of the limiting ring 205 is slidably connected to the lower surface of the sealing plate 203. The lower surface of the connecting rod 304 is fixedly connected to a worm gear 303, and the outer surface of the worm gear 303 is meshingly connected to a worm 302.

[0032] By further rotating the knob 301, the positions of the first through hole 204 and the second through hole 206 can be adjusted, thereby conveniently controlling the water to be sprayed from the first nozzle 201 or the second nozzle 202, thereby preventing a group of nozzles from being blocked, causing the drill body 1 to be unusable, and conveniently flushing the other group of nozzles.

[0033] Example 2

[0034] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 , which is the second embodiment of the utility model. This embodiment is based on the previous embodiment. One end of the worm 302 is rotatably connected to the inner wall of the drill body 1, and the other end of the worm 302 passes through the outer surface of the drill body 1 and is fixedly connected to the knob 301.

[0035] Specifically, the outer surface of the worm 302 and the outer surface of the drill body 1 are sealed so that the worm 302 can rotate on the outer surface of the drill body 1 without liquid flowing out during the rotation.

[0036] Further rotate the knob 301, and the rotation of the knob 301 drives the worm 302 to rotate, and the rotation of the worm 302 drives the worm wheel 303 to rotate, and the rotation of the worm wheel 303 drives the connecting rod 304 to rotate, so that the connecting rod 304 drives the sealing plate 203 to rotate, so as to facilitate the adjustment of the angle between the first through hole 204 and the second nozzle 202, and the angle between the first nozzle 201 and the second through hole 206, so as to facilitate the adjustment of the water output of the first nozzle 201 and the second nozzle 202, and facilitate the adjustment of the water output speed of the first nozzle 201 and the second nozzle 202.

[0037] Working principle: by rotating the knob 301, the knob 301 rotates to drive the worm 302 to rotate, the worm 302 rotates to drive the worm wheel 303 to rotate, and the worm wheel 303 rotates to drive the connecting rod 304 to rotate, so that the connecting rod 304 drives the sealing plate 203 to rotate, so as to facilitate the adjustment of the positions of the first through hole 204 and the second through hole 206, so as to facilitate the control of water spraying from the first nozzle 201 or the second nozzle 202, so as to prevent the drill body 1 from being unusable when one group of nozzles is blocked, and at the same time, it is convenient to flush the other group of nozzles, and at the same time, it is convenient to adjust the angle between the first through hole 204 and the second nozzle 202, as well as the angle between the first nozzle 201 and the second through hole 206, so as to facilitate the adjustment of the water output of the first nozzle 201 and the second nozzle 202, and the water output speed of the first nozzle 201 and the second nozzle 202.

[0038] It should be noted that, in this document, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

Claims

1. A PDC drill bit for preventing nozzle clogging, comprising a drill bit body (1), a self-cleaning mechanism (2) and an adjusting mechanism (3), wherein the self-cleaning mechanism (2) is slidably connected to the inner wall of the drill bit body (1), and the adjusting mechanism (3) is fixedly connected to the outer surface of the self-cleaning mechanism (2), characterized in that: The self-cleaning mechanism (2) comprises a sealing plate (203) slidably connected to the inner wall of the drill body (1), and the adjustment mechanism (3) comprises a connecting rod (304) fixedly connected to the lower surface of the sealing plate (203); The self-cleaning mechanism (2) further comprises a first nozzle (201) and a second nozzle (202) which are arranged on the outer surface of the drill body (1), and the lower ends of the first nozzle (201) and the second nozzle (202) are in contact with the upper surface of the sealing plate (203); The lower surface of the connecting rod (304) is fixedly connected to a worm wheel (303), and the outer surface of the worm wheel (303) is meshingly connected to a worm (302).

2. A PDC drill bit for preventing nozzle clogging according to claim 1, characterized in that: A second through hole (206) is provided on the upper surface of the sealing plate (203) at a position corresponding to the first nozzle (201), and the outer surface of the second through hole (206) is connected to the lower end of the first nozzle (201).

3. A PDC drill bit for preventing nozzle clogging according to claim 2, characterized in that: A first through hole (204) is provided on the upper surface of the sealing plate (203) at a position corresponding to the second nozzle (202), and the first through hole (204) and the first nozzle (201) are staggered.

4. A PDC drill bit for preventing nozzle clogging according to claim 1, characterized in that: A limit ring (205) is fixedly connected to the inner wall of the drill body (1), and the upper surface of the limit ring (205) is slidably connected to the lower surface of the sealing plate (203).

5. A PDC drill bit for preventing nozzle clogging according to claim 4, characterized in that: One end of the worm (302) is rotatably connected to the inner wall of the drill body (1), and the other end of the worm (302) passes through the outer surface of the drill body (1) and is fixedly connected to a knob (301).

6. A PDC drill bit for preventing nozzle clogging according to claim 1, characterized in that: The outer surface of the worm (302) and the outer surface of the drill body (1) are sealed by means of a sealing gasket and a sealing ring.

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