PDC drill bit capable of rapidly discharging chips

Abstract

The utility model discloses a PDC (Polycrystalline Diamond Compact) drill bit capable of quickly removing chips, which comprises a drill bit body, long blades and short blades are arranged on the drill bit body at equal intervals, and cutting teeth are fixed on the long blades and the short blades. The drill bit has the advantages that the long blades and the short blades are sleeved with the stirrup rings, when the cutting teeth are seriously abraded and fractured, the installation bolts on the long blades or the short blades with the fractured cutting teeth are screwed firstly, limiting of the installation bolts on the drill bit body is eliminated, then the hooping bolts are screwed to enable the hooping rings to be loosened, and the long blades or the short blades with the fractured cutting teeth are fixed. The long blades and the short blades on the drill bit body can be hooped and limited at the same time through the hooping ring, the long blades or the short blades with the broken cutting teeth can be detached and replaced from the drill bit body conveniently, the mounting and dismounting convenience of the long blades and the short blades on the drill bit body is improved, the situation that the whole PDC drill bit is scrapped due to the fact that the cutting teeth are broken is avoided, and cost is prevented from being increased.

Description

Technical Field

[0001] This utility model relates to the field of drill bit technology, specifically to a PDC drill bit with rapid chip removal capability. Background Technology

[0002] PDC drill bits are drilling tools that use PDC composite plates for cutting operations. They utilize the high hardness and wear resistance of PDC composite plates to effectively break rocks during drilling, thereby improving drilling efficiency. PDC drill bits are widely used in the exploration and mining of oil, natural gas, coalfields, and other mineral resources.

[0003] Existing chip-removing PDC drill bits achieve rapid removal of core cuttings by directing the nozzle's spray direction towards the opposite chip removal groove, thus preventing core cuttings from accumulating and repeatedly cutting the core. However, the breakage of the cutting teeth typically occurs on the outermost cutting teeth with the largest diameter at the crown of the PDC drill bit. Since these cutting teeth are in direct contact with the rock during drilling, they experience the greatest impact force. The breakage of these cutting teeth leads to uneven stress on the remaining cutting teeth, accelerating drill bit failure. Furthermore, because the PDC drill bit is a single unit, severe wear and breakage of the cutting teeth can render the PDC drill bit unusable, requiring replacement of the entire PDC drill bit and increasing scrap costs. Therefore, there is an urgent need for a new type of PDC drill bit with rapid chip removal to solve these problems. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] The technical problem to be solved by this utility model is to provide a PDC drill bit with fast chip removal that is easy to replace broken cutting teeth and reduces scrap costs, in light of the current state of the technology.

[0006] (II) Technical Solution

[0007] This utility model is achieved through the following technical solution: This utility model proposes a PDC drill bit with rapid chip removal, including a drill bit body, on which long cutter wings and short cutter wings are equally spaced. Cutting teeth are fixed on both the long cutter wings and the short cutter wings. Mounting bolts are provided on both the long cutter wings and the short cutter wings. A clamping ring is sleeved under the long cutter wings and the short cutter wings, and clamping bolts are installed on the clamping ring.

[0008] Furthermore, a chip removal groove is provided on the drill bit body between the long blade and the short blade, and a nozzle is installed on the chip removal groove.

[0009] Furthermore, both the long blade and the short blade are welded to the cutting teeth, and the long blade and the short blade are spaced apart on the drill bit body.

[0010] Furthermore, the chip removal groove is formed between the long blade and the short blade, and the nozzle is provided on the long blade facing the center of the drill bit body. Both the chip removal groove and the long blade are threadedly connected to the nozzle.

[0011] Furthermore, the mounting bolt passes through the long blade and the short blade and is threadedly connected to the drill bit body. The mounting bolt is made of stainless steel.

[0012] Furthermore, the clamping ring is sleeved on the outside of the long blade and the short blade, and the clamping ring has a circular ring structure.

[0013] Furthermore, the clamping ring is threadedly connected to the clamping bolt, and the clamping bolt is made of stainless steel.

[0014] (III) Beneficial Effects

[0015] Compared with the prior art, this utility model has the following advantages:

[0016] This invention utilizes a stirrup ring fitted onto both the long and short blades. When the cutting teeth show severe wear and breakage, the mounting bolt on the broken blade is first loosened to release its restraint on the drill bit body. Then, the stirrup is loosened to loosen the stirrup ring. The stirrup ring can simultaneously tighten and restrain both the long and short blades on the drill bit body, facilitating the removal and replacement of the broken blade. This improves the ease of installation and removal of the blades, preventing the PDC drill bit from being scrapped due to blade breakage and thus reducing costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a PDC drill bit with rapid chip removal as described in this utility model;

[0018] Figure 2 This is a top view of a PDC drill bit with rapid chip removal as described in this utility model.

[0019] The annotations in the attached figures are explained as follows:

[0020] 1. Drill bit body; 2. Long cutter blade; 3. Short cutter blade; 4. Cutting teeth; 5. Mounting pin; 6. Clamping ring; 7. Clamping pin; 8. Chip removal groove; 9. Nozzle. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0022] like Figures 1-2 As shown, a PDC drill bit with rapid chip removal in this embodiment includes a drill bit body 1. Long blades 2 and short blades 3 are equidistantly arranged on the drill bit body 1. Cutting teeth 4 are fixed to both the long blades 2 and short blades 3. The long blades 2 and short blades 3 can more firmly fix the cutting teeth 4. Under the action of drilling pressure and torque, the cutting teeth 4 cut into the formation, advancing the drill bit by shearing and breaking the rock, thus improving the rock breaking efficiency. Mounting bolts 5 are provided on both the long blades 2 and short blades 3, which can more firmly fix the long blades 2 and short blades 3 to the drill bit body 1. A clamping ring 6 is sleeved below the long blades 2 and short blades 3, and a clamping bolt 7 is installed on the clamping ring 6. Tightening the clamping bolt 7 can better retract the clamping ring 6, making it easier for the clamping ring 6 to limit and fix the long blades 2 and short blades 3 together.

[0023] like Figures 1-2 As shown, in this embodiment, a chip removal groove 8 is provided on the drill bit body 1 between the long blade 2 and the short blade 3. A nozzle 9 is installed on the chip removal groove 8. The chip removal groove 8 can better clean the drill chips at the drill bit cone, reduce heat accumulation, reduce thermal damage, thereby extending the drill bit life and increasing the mechanical drilling speed. Both the long blade 2 and the short blade 3 are welded to the cutting teeth 4. The long blade 2 and the short blade 3 are spaced apart on the drill bit body 1. The chip removal groove 8 is formed between the long blade 2 and the short blade 3. A nozzle 9 is provided on the long blade 2 facing the center of the drill bit body 1. Both the chip removal groove 8 and the long blade 2 are threadedly connected to the nozzle 9. The nozzle 9 can be more securely fixed by the long blade 2 and the nozzle 9 can better spray cutting fluid into the chip removal groove 8, which is convenient for cleaning the drill chips in the chip removal groove 8. The mounting bolt 5 passes through the long blade 2 and the short blade 3 and is threaded to the drill body 1. The mounting bolt 5 is made of stainless steel. The clamping ring 6 is sleeved on the long blade 2 and the short blade 3. The clamping ring 6 has a circular structure. The clamping ring 6 can better limit the long blade 2 and the short blade 3 at the same time, which is convenient for clamping or loosening the lower end of the long blade 2 and the short blade 3. The clamping ring 6 is threaded to the clamping bolt 7. The clamping bolt 7 is made of stainless steel.

[0024] The specific implementation process of this embodiment is as follows: In use, the drill bit body 1 is first installed on the drilling rig. The nozzle 9 can more easily spray cutting fluid to quickly remove rock chips from the chip removal groove 8, while simultaneously performing physical cooling. By installing a hoop ring on the long blade 2 and the short blade 3, when the cutting tooth 4 is severely worn and broken, first turn the mounting bolt 5 on the broken long blade 2 or short blade 3 of the cutting tooth 4 to remove its limit on the drill bit body 1. Then turn the hoop bolt 7 to loosen the hoop ring 6. The hoop ring 6 can hoop and limit the long blade 2 and short blade 3 on the drill bit body 1 at the same time, which makes it easy to remove and replace the broken long blade 2 or short blade 3 of the cutting tooth 4 from the drill bit body 1. This improves the ease of installation and disassembly of the long blade 2 and short blade 3 on the drill bit body 1, avoids the PDC drill bit from being scrapped due to the breakage of the cutting tooth, and prevents increased costs.

[0025] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fast-drilling PDC bit, characterized by: Including drill bit body (1), long blade (2) and short blade (3) are equidistantly arranged on the drill bit body (1), cutting teeth (4) are fixed on the long blade (2) and the short blade (3), mounting pegs (5) are arranged on the long blade (2) and the short blade (3), hoop rings (6) are sleeved below the long blade (2) and the short blade (3), and hoop pegs (7) are mounted on the hoop rings (6).

2. A fast chip removal PDC drill bit according to claim 1, characterized in that: A chip groove (8) is arranged between the long blade (2) and the short blade (3) on the drill bit body (1), and a nozzle (9) is mounted on the chip groove (8).

3. A fast chip removal PDC drill bit according to claim 1, characterized in that: The long blade (2) and the short blade (3) are welded with the cutting teeth (4), and the long blade (2) and the short blade (3) are arranged at intervals on the drill bit body (1).

4. A fast chip removal PDC drill bit according to claim 2, characterized in that: The chip groove (8) is formed between the long blade (2) and the short blade (3), the long blade (2) is provided with the nozzle (9) facing the center of the drill bit body (1), and the chip groove (8) and the long blade (2) are threadedly connected with the nozzle (9).

5. The fast chip removal PDC drill bit of claim 1, wherein: The mounting pegs (5) are threadedly connected with the long blade (2) and the short blade (3) on the drill bit body (1), and the mounting pegs (5) are made of stainless steel.

6. A fast chip removal PDC drill bit according to claim 1, characterized in that: The hoop rings (6) are sleeved outside the long blade (2) and the short blade (3), and the hoop rings (6) are circular ring structures.

7. A fast chip removal PDC drill bit according to claim 1, characterized in that: The hoop rings (6) are threadedly connected with the hoop pegs (7).

8. A fast chip removal PDC drill bit according to claim 7, characterized in that: The hoop pegs (7) are made of stainless steel.

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