Magnetic arc-angle double-attached-wing drill bit

Abstract

The invention discloses a magnetic arc-angle double-attached-wing drill bit, and relates to the technical field of arc-angle drill bits. A plurality of blades are arranged, the plurality of blades are circumferentially distributed at one end embedded into the gum, a magnetic hole is formed in the side wall of each blade, a magnet is mounted in the magnetic hole, a plurality of cutting teeth are arranged on each blade, and the plurality of cutting teeth on each blade are sequentially arranged in the radial direction embedded into the gum and are positioned at different heights, two of the multiple blades are provided with auxiliary blade cutting teeth, and the auxiliary blade cutting teeth are higher than other cutting teeth on the blade where the auxiliary blade cutting teeth are located. Through the arrangement of the auxiliary wing cutting teeth, in the drilling process of the high-power drilling machine, diamond fragments and falling caused by propelling pressure of the cutting teeth can be reduced, and the drilling service life of the auxiliary wing cutting teeth is greatly prolonged when the auxiliary wing cutting teeth are used for drilling granite and yellow iron nodule.

Description

Technical Field

[0001] The present invention relates to the technical field of arc angle drill bits, and more particularly to a magnetic arc angle double-wing drill bit. Background Art

[0002] With the continuous updating of coal mine extraction drilling rigs, the power of full hydraulic drilling rigs is also increasing. The flat-top eight-tooth drill bits and arc-angle ten-tooth drill bits used in the commonly used φ90~φ94 apertures are gradually unable to cope with the strength of the drilling rig's propulsion pressure. The original drill bits are prone to damage during the drilling process, especially when facing pyrite nodules in coal mine rocks and in the drilling process of granite. The cutting teeth are easily broken under the propulsion of high-power drilling, which in turn affects the service life of the drill bit.

[0003] Therefore, how to provide a magnetic lone angle double-wing drill bit that can increase the service life of the drill bit when facing a high-power drilling rig and drilling relatively hard rocks such as pyrite nodules and granite is a problem that technical personnel in this field urgently need to solve. Summary of the Invention

[0004] In view of this, the present invention provides a magnetic lone angle double-wing drill bit, which aims to solve the problems in the above-mentioned background technology and improve the service life of the drill bit when a high-power drilling rig is used to drill long distances into pyrite nodules, granite and other rocks with relatively high hardness.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] The present invention provides a magnetic lone angle double-wing drill bit, comprising:

[0007] Embedded in the gums;

[0008] The blade wing is provided with a plurality of blade wings, and the plurality of blade wings are circumferentially distributed at one end of the embedded gum. A magnetic hole is provided on the side wall of each blade wing, and a magnet is installed in the magnetic hole. Each blade wing is provided with a plurality of cutting teeth, and the plurality of cutting teeth on each blade wing are arranged in sequence in the radial direction of the embedded gum and are located at different heights, wherein two of the plurality of blade wings are provided with auxiliary wing cutting teeth, and the auxiliary wing cutting teeth are higher than the other cutting teeth on the blade wing where the auxiliary wing cutting teeth are located.

[0009] According to some embodiments of the present invention, there are four blade wings, namely, a first blade wing, a second blade wing, a third blade wing and a fourth blade wing, and the two auxiliary wing cutting teeth are respectively a first auxiliary wing cutting tooth and a second auxiliary wing cutting tooth;

[0010] The first blade is provided with a first cutting tooth, a fourth cutting tooth and a tenth cutting tooth in sequence from the inside to the outside;

[0011] The second blade is provided with a third cutting tooth and an eighth cutting tooth in sequence from the inside to the outside, and the second auxiliary wing cutting tooth is provided on one side of the eighth cutting tooth;

[0012] The third blade is provided with a second cutting tooth, a seventh cutting tooth and a twelfth cutting tooth in sequence from the inside to the outside;

[0013] The fourth blade is provided with a fifth cutting tooth and an eleventh cutting tooth in sequence from the inside to the outside, and the first auxiliary wing cutting tooth is also provided on one side of the fifth cutting tooth;

[0014] Among them, the second cutting tooth is higher than the first cutting tooth, and the second cutting tooth, the third cutting tooth, the fourth cutting tooth and the fifth cutting tooth are located on the same horizontal plane, and have different cutting trajectories; the seventh cutting tooth is lower than the second cutting tooth, and the cutting trajectory of the seventh cutting tooth is located outside the cutting trajectory of the second cutting tooth, and the heights of the seventh cutting tooth, the eighth cutting tooth, the tenth cutting tooth, the eleventh cutting tooth and the twelfth cutting tooth gradually decrease, and the cutting trajectories gradually expand outward; the cutting trajectory of the second wing cutting tooth is located outside the cutting trajectory of the eighth cutting tooth, and the cutting trajectory of the first wing cutting tooth is located outside the cutting trajectory of the fifth cutting tooth.

[0015] According to some embodiments of the present invention, the first wing cutting teeth are 1 mm higher than the fifth cutting teeth; and the second wing cutting teeth are 1 mm higher than the eighth cutting teeth.

[0016] According to some embodiments of the present invention, a cooling hole is provided at the center of the embedded gum, and the cooling hole penetrates the embedded gum along the axial direction.

[0017] According to some embodiments of the present invention, four cooling holes are provided.

[0018] According to some embodiments of the present invention, a gauge strip is embedded on the side wall of the embedded gum near the blade wing, and the gauge strip extends along the axial direction of the embedded gum.

[0019] According to some embodiments of the present invention, a slag discharge groove is formed between adjacent blades.

[0020] It can be seen from the above technical solution that, compared with the prior art, the present invention discloses a magnetic lone-angle double-wing drill bit, in which wing cutting teeth are provided on two blades and magnetic holes are provided on the side walls of the blades. The setting of the magnetic holes can absorb the debris fallen by the cutting teeth of the diamond composite piece when it is smashed and falls off during operation, so as to avoid further damage to the drill bit body by the broken diamond particles. At the same time, the magnetic holes can also absorb metal particles and / or metal-containing micro-grained rock samples in the borehole during the drilling process. The setting of the wing cutting teeth can reduce the falling of diamond fragments caused by the thrust pressure of the cutting teeth during the drilling process of a high-power drilling rig, and greatly enhance its drilling life when drilling granite and pyrite nodules. The magnetic arc angle double-wing drill bit of the present invention can easily cope with the drilling of hard rocks in coal mines. It can not only resist pyrite nodules in coal mine rocks, but also withstand long-distance drilling of granite, the hardest rock on the surface. The addition of double-wing cutting teeth can, on the one hand, cope with the strong propulsion pressure of advanced drilling rigs, and on the other hand, prevent the main blade from breaking during the drill bit cutting, thereby increasing the service life of the drill bit in complex rock drilling. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0022] Figure 1 A top view of the magnetic lone angle double-wing drill bit provided by the present invention;

[0023] Figure 2 A three-dimensional diagram of the magnetic lone angle double-wing drill bit provided by the present invention;

[0024] Figure 3 A schematic structural diagram of the magnetic lone angle double-wing drill bit provided by the present invention from another perspective.

[0025] In the figure: 101 is the first blade; 102 is the second blade; 103 is the third blade; 104 is the fourth blade; 201 is the first cutting tooth; 202 is the second cutting tooth; 203 is the third cutting tooth; 204 is the fourth cutting tooth; 205 is the fifth cutting tooth; 206 is the first appendage cutting tooth; 207 is the seventh cutting tooth; 208 is the eighth cutting tooth; 209 is the second appendage cutting tooth; 210 is the tenth cutting tooth; 211 is the eleventh cutting tooth; 212 is the twelfth cutting tooth; 3 is embedded in the gum; 4 is the magnetic hole; 5 is the cooling hole; 6 is the gauge strip. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0027] See also Figure 1-3 The embodiment of the present invention discloses a magnetic lone angle double-wing drill bit, including: an embedded gum 3 and a blade.

[0028] There are multiple blade wings, which are circumferentially distributed at one end of the embedded gum 3. A magnetic hole 4 is opened on the side wall of each blade wing, and a magnet is installed in the magnetic hole 4. Each blade wing is provided with multiple cutting teeth. The multiple cutting teeth on each blade wing are arranged in sequence in the radial direction of the embedded gum 3 and are located at different heights. Among them, two blade wings among the multiple blade wings are provided with auxiliary wing cutting teeth, and the auxiliary wing cutting teeth are higher than the other cutting teeth on the blade wing where the auxiliary wing cutting teeth are located.

[0029] It should be noted that, in this embodiment, the magnet is fixedly set in the magnetic hole 4, the diameter of the magnetic hole 4 is 7 mm, and the magnet can be fixed in the magnetic hole 4 by copper welding, silver welding or gluing. The height of the magnet is less than the depth of the magnetic hole 4, thereby forming a magnetic adsorption space, so that ferromagnetic metal particles (pyrite nodules, cobalt, nickel, tungsten, iron, scandium, titanium, vanadium, etc.) and / or micro-grained rock samples containing ferromagnetic metals can be adsorbed at the magnetic hole 4. During the rock drilling process, magnetic metal particles (such as pyrite nodules, cobalt, nickel, tungsten, iron, scandium, titanium, vanadium, etc.) can be adsorbed. The cutting teeth are made of diamond composite teeth. Due to the presence of paramagnetic elements such as cobalt, nickel, silicon, tungsten, iron, scandium, titanium, and vanadium in the diamond composite teeth, the brittleness of the cutting teeth can be reduced, their elasticity can be improved, and the breakage or cracking of the cutting teeth due to brittle damage during drilling can be reduced, thereby extending the service life of the cutting teeth. Moreover, when the diamond composite teeth are broken, the magnet can magnetically adsorb the fragments of the diamond composite teeth to prevent them from scattering.

[0030] In a further embodiment, four blade wings are provided, namely the first blade wing 101, the second blade wing 102, the third blade wing 103 and the fourth blade wing 104, and the two auxiliary wing cutting teeth are respectively the first auxiliary wing cutting tooth 206 and the second auxiliary wing cutting tooth 209;

[0031] The first blade 101 is provided with a first cutting tooth 201, a fourth cutting tooth 204 and a tenth cutting tooth 210 in sequence from the inside to the outside;

[0032] The second blade wing 102 is provided with a third cutting tooth 203 and an eighth cutting tooth 208 in sequence from the inside to the outside, and a second auxiliary wing cutting tooth 209 is provided on one side of the eighth cutting tooth 208;

[0033] The third blade 103 is provided with a second cutting tooth 202, a seventh cutting tooth 207 and a twelfth cutting tooth 212 in sequence from the inside to the outside;

[0034] The fourth blade wing 104 is provided with a fifth cutting tooth 205 and an eleventh cutting tooth 211 in sequence from the inside to the outside, and a first auxiliary wing cutting tooth 206 is also provided on one side of the fifth cutting tooth 205;

[0035] Among them, the second cutting tooth 202 is higher than the first cutting tooth 201, and the second cutting tooth 202, the third cutting tooth 203, the fourth cutting tooth 204 and the fifth cutting tooth 205 are located on the same horizontal plane, and the cutting trajectories are different; the seventh cutting tooth 207 is lower than the second cutting tooth 202, and the cutting trajectory of the seventh cutting tooth 207 is located outside the cutting trajectory of the second cutting tooth 202, and the heights of the seventh cutting tooth 207, the eighth cutting tooth 208, the tenth cutting tooth 210, the eleventh cutting tooth 211 and the twelfth cutting tooth 212 gradually decrease, and the cutting trajectories gradually expand outward; the cutting trajectory of the second wing cutting tooth 209 is located outside the cutting trajectory of the eighth cutting tooth 208, and the cutting trajectory of the first wing cutting tooth 206 is located outside the cutting trajectory of the fifth cutting tooth 205.

[0036] It should be noted that, by setting four blades, and setting three teeth on each blade, wherein the second blade wing 102 and the fourth blade wing 104 include an auxiliary wing cutting tooth, the φ94 caliber drill bit is transformed from the original four-wing ten-tooth drill bit to a four-wing twelve-tooth drill bit, and all the cutting teeth are arranged in a pyramid shape from high to low, from the first cutting tooth 201 → the second cutting tooth 202 → the third cutting tooth 203 → the fourth cutting tooth 204 → the fifth cutting tooth 205 → the first auxiliary wing cutting tooth 206 → the seventh cutting tooth 207 → the eighth cutting tooth 208 → the second auxiliary wing cutting tooth 209 →The cutting trajectory of the tenth cutting tooth 210→the eleventh cutting tooth 211→the twelfth cutting tooth 212 gradually expands outward, and drilling is performed with 12 trajectory friction lines during the drilling process. The two wing cutting teeth can assist the main knife cutting, thereby making the magnetic lone angle double wing drill bit of the present invention can easily cope with the drilling of hard rocks in coal mines. It can not only resist pyrite nodules in coal mine rocks, but also resist long-distance drilling of granite, the hardest rock on the surface. The addition of double wing blades can, on the one hand, cope with the strong propulsion pressure of advanced drilling rigs, and on the other hand, prevent the main blade from breaking during the drill bit cutting.

[0037] In a further embodiment, the first wing cutting tooth 206 is preferably 1 mm higher than the fifth cutting tooth; and the second wing cutting tooth 209 is 1 mm higher than the eighth cutting tooth. The first wing cutting tooth 206 cuts first with the fifth cutting tooth 205. Under the action of the first wing cutting tooth 206, the force on the fifth cutting tooth 205 is relatively small. Similarly, the second wing cutting tooth 209 can assist the eighth cutting tooth 208, so that the force on the eighth cutting tooth 208 is relatively small. The fifth cutting tooth 205 and the eighth cutting tooth 208 serve as the main cutting teeth, and the first wing cutting tooth 206 and the second wing cutting tooth 209 serve as auxiliary cutting teeth.

[0038] In a further embodiment, a cooling hole 5 is provided in the center of the embedded gum 3, and the cooling hole 5 axially penetrates the embedded gum 3. The cooling hole 5 can be cooled by water or air, or by a combination of air and water. The combination of air and water is preferred, which can achieve effective cooling and prevent the cutting teeth from falling off due to high temperature.

[0039] In a further embodiment, preferably, four cooling holes 5 are provided. The four cooling holes 5 are distributed in a circular array along the axis of the embedded gum 3.

[0040] In a further embodiment, a gage strip 6 is embedded on the side wall of the insert 3 near the blade, extending axially along the insert 3. The gage strip 6 ensures that the diameter of the holes formed is uniform and the holes are uniform without size deviation; the gage strip 6 is preferably made of alloy steel.

[0041] In a further embodiment, slag removal grooves are formed between adjacent blades. At the same time, slag removal grooves are also provided between the cutting teeth on the same blade, thereby improving the slag removal performance of the drill bit during drilling.

[0042] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0043] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one 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 limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A magnetic lone angle double-wing drill bit, characterized in that: include: Embedded in the gums; The blade wing is provided with a plurality of blade wings, and the plurality of blade wings are circumferentially distributed at one end of the embedded gum. A magnetic hole is provided on the side wall of each blade wing, and a magnet is installed in the magnetic hole. Each blade wing is provided with a plurality of cutting teeth, and the plurality of cutting teeth on each blade wing are arranged in sequence in the radial direction of the embedded gum and are located at different heights, wherein two of the plurality of blade wings are provided with auxiliary wing cutting teeth, and the auxiliary wing cutting teeth are higher than the other cutting teeth on the blade wing where the auxiliary wing cutting teeth are located.

2. The magnetic lone angle double-wing drill bit according to claim 1, characterized in that: There are four blade wings, namely the first blade wing, the second blade wing, the third blade wing and the fourth blade wing, and the two auxiliary wing cutting teeth are respectively the first auxiliary wing cutting tooth and the second auxiliary wing cutting tooth; The first blade is provided with a first cutting tooth, a fourth cutting tooth and a tenth cutting tooth in sequence from the inside to the outside; The second blade is provided with a third cutting tooth and an eighth cutting tooth in sequence from the inside to the outside, and the second auxiliary wing cutting tooth is provided on one side of the eighth cutting tooth; The third blade is provided with a second cutting tooth, a seventh cutting tooth and a twelfth cutting tooth in sequence from the inside to the outside; The fourth blade is provided with a fifth cutting tooth and an eleventh cutting tooth in sequence from the inside to the outside, and the first auxiliary wing cutting tooth is also provided on one side of the fifth cutting tooth; Among them, the second cutting tooth is higher than the first cutting tooth, and the second cutting tooth, the third cutting tooth, the fourth cutting tooth and the fifth cutting tooth are located on the same horizontal plane, and have different cutting trajectories; the seventh cutting tooth is lower than the second cutting tooth, and the cutting trajectory of the seventh cutting tooth is located outside the cutting trajectory of the second cutting tooth, and the heights of the seventh cutting tooth, the eighth cutting tooth, the tenth cutting tooth, the eleventh cutting tooth and the twelfth cutting tooth gradually decrease, and the cutting trajectories gradually expand outward; the cutting trajectory of the second wing cutting tooth is located outside the cutting trajectory of the eighth cutting tooth, and the cutting trajectory of the first wing cutting tooth is located outside the cutting trajectory of the fifth cutting tooth.

3. The magnetic lone angle double-wing drill bit according to claim 2, characterized in that: The first wing cutting teeth are 1 mm higher than the fifth cutting teeth; the second wing cutting teeth are 1 mm higher than the eighth cutting teeth.

4. The magnetic lone angle double-wing drill bit according to claim 1, characterized in that: A cooling hole is provided at the center of the embedded gum, and the cooling hole penetrates the embedded gum along the axial direction.

5. The magnetic lone angle double-wing drill bit according to claim 4, characterized in that: There are four cooling holes.

6. The magnetic lone angle double-wing drill bit according to claim 1, characterized in that: A gauge strip is embedded on the side wall of the embedded gum at a position close to the blade wing, and the gauge strip extends along the axial direction of the embedded gum.

7. The magnetic lone angle double-wing drill bit according to claim 1, characterized in that: A slag discharge groove is formed between adjacent blades.

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