Large-diameter diamond bit for drilling construction

Abstract

The utility model belongs to the technical field of diamond drill bits, and particularly relates to a large-diameter diamond drill bit for drilling construction, which comprises a supporting part, a butt joint part is arranged at one end of the supporting part, a drilling part is arranged at one end, far away from the butt joint part, of the supporting part, and a plurality of drilling wings are arranged on the drilling part. The utility model has the beneficial effects that the drilling bulges are integrally arranged on the side surfaces of the drilling wings, and are positioned on the side surfaces of the drilling wings, so that when the drilling wings are used for drilling, the drilling bulges are firstly in contact with a drilled material, and the drilling bulges are in contact with the drilled material; due to the fact that the area of the drilling crack protrusions is small, a row of grooves can be drilled in a drilled substance, the drilled substance is broken and incomplete, and the drilling wing can conveniently drill and break in a labor-saving mode.

Description

Technical Field

[0001] The utility model relates to the technical field of diamond drill bits, in particular to a diamond drill bit for large-caliber drilling construction. Background Art

[0002] Field use has proven that diamond drill bits have the advantages of high speed, high footage, long life, stable operation, few downhole accidents, and good wellbore quality when drilling in soft to medium-hard formations. Diamond drill bits not only have a long service life, but can also be reused. The performance of diamond drill bits returned to the factory for repair is almost the same as that of diamond drill bits shipped from the factory, which can save a lot of drilling costs.

[0003] The existing diamond drill bits have an unreasonable crown shape design, and the drilling wings of the crown are usually flat. Therefore, when drilling hard formations, the contact surface between the drilling wings and the hard formation is large, making it difficult to drill the hard formation cracks. As a result, the drill bit cannot achieve a high mechanical penetration rate when drilling soft to medium-hard formations, and the applicability of the drill bit is limited. Utility Model Content

[0004] In view of the problems existing in the existing large-diameter diamond drill bit for drilling construction, the utility model is proposed.

[0005] Therefore, the purpose of the utility model is to provide a large-diameter diamond drill bit for drilling construction, which solves the problem of the existing diamond drill bit that, due to the unreasonable design of the crown shape of the drill bit, the drilling wing of the crown is usually flat. Therefore, when drilling hard formations, the contact surface between the drilling wing and the hard formation is large, so it is not easy to drill the hard formation cracks, so that the drill bit cannot obtain a higher mechanical penetration rate when drilling soft to medium-hard formations, and the applicability of the drill bit is limited.

[0006] In order to solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0007] A diamond drill bit for large-diameter drilling construction comprises a support part, one end of the support part is provided with a docking part, the end of the support part away from the docking part is provided with a drilling part, the drilling part is provided with a plurality of drilling wings, material guide grooves are provided between adjacent drilling wings, and a drilling protrusion is integrally provided on the side of the drilling wing.

[0008] As a preferred solution of the large-diameter diamond drill bit for drilling construction described in the utility model, the docking portion is configured as a joint, an outer wall of the joint is provided with an external thread, and the joint and the support portion are an integrally formed structure.

[0009] As a preferred solution of the large-diameter diamond drill bit for drilling construction described in the utility model, the drilling part and the supporting part are an integrally formed structure.

[0010] As a preferred solution of a large-diameter diamond drill bit for drilling construction described in the utility model, wherein: a first through hole is opened on the drilling part, a second through hole is opened on the supporting part, and a third through hole is opened on the joint, and the first through hole, the second through hole and the third through hole are connected.

[0011] As a preferred solution of the large-diameter diamond drill bit for drilling construction described in the utility model, the intersection of the various surfaces of the drilling wing is pointed.

[0012] As a preferred solution of the large-diameter diamond drill bit for drilling construction described in the utility model, each drilling wing of the drilling part is provided with a through hole, and the through holes and the drilling protrusions are distributed alternately.

[0013] As a preferred solution of the large-diameter diamond drill bit for drilling construction described in the utility model, a fixing block is integrally provided on the outer wall of the support portion, an internal threaded hole is opened on the fixing block, and when the joint is connected to the drilling rod, bolts are used to fix the fixing block and the drilling rod.

[0014] Compared with existing technologies:

[0015] 1. A drilling protrusion is integrally provided on the side of the drilling wing. The drilling protrusion is located on the side of the drilling wing. Therefore, when the drilling wing is drilling, the drilling protrusion first contacts the drilled material. Since the area of ​​the drilling protrusion is small, a row of grooves can be drilled in the drilled material, so that the drilled material is broken and incomplete, which makes it easier for the drilling wing to drill and break it.

[0016] 2. There are guide grooves between adjacent drilling wings. During the drilling process, the drilled materials are more easily guided upwards under the action of the guide grooves, making drilling easier;

[0017] 3. The presence of the through holes on the drilling wing not only makes it easier to guide the material, but also the coolant is discharged through the through holes, so that the coolant can fully cover and wet all positions of the drill bit, thereby achieving sufficient cooling of the drill bit. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure provided for Example 1 of the utility model;

[0019] Figure 2 Provided for the utility model embodiment 1 Figure 1 A cross-sectional view of

[0020] Figure 3 A schematic diagram of the structure provided for Embodiment 2 of the present utility model;

[0021] Figure 4 This is a schematic diagram of the structure provided for Example 3 of the present utility model.

[0022] In the figure: support part 1, second through hole 11, joint 2, third through hole 21, drilling protrusion 3, through hole 4, drilling wing 5, first through hole 6, material guide groove 7, fixing block 9, internal threaded hole 91. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings. Example 1

[0024] The utility model provides a large-diameter diamond drill bit for drilling construction. Figure 1-2 , including a support portion 1, a docking portion is provided at one end of the support portion 1, and the docking portion is arranged as a joint 2. An external thread is provided on the outer wall of the joint 2, and the joint 2 and the support portion 1 are an integrally formed structure. A drilling portion is provided at one end of the support portion 1 away from the docking portion, and the drilling portion and the support portion 1 are an integrally formed structure. A plurality of drilling wings 5 ​​are provided on the drilling portion, and the intersection of each surface of the drilling wing 5 is pointed. A material guide groove 7 is provided between adjacent drilling wings 5. During the drilling process, under the action of the material guide groove 7, the drilled material is more easily guided upward, thereby making drilling easier. A drilling protrusion 3 is integrally provided on the side of the drilling wing 5, and the drilling protrusion 3 is located on the side of the drilling wing 5. Therefore, when the drilling wing 5 is drilling, the drilling protrusion 3 first contacts with the drilled material. Since the area of ​​the drilling protrusion 3 is small, a row of grooves can be drilled out of the drilled material, so that the drilled material is broken and incomplete, thereby facilitating the drilling and fragmenting of the drilling wing 5 with little effort.

[0025] A first through hole 6 is provided on the drilling part, a second through hole 11 is provided on the supporting part 1, and a third through hole 21 is provided on the joint 2. The first through hole 6, the second through hole 11 and the third through hole 21 are connected. Cooling liquid is injected into the drilled well through a cooling channel formed by the first through hole 6, the second through hole 11 and the third through hole 21, thereby preventing the drill bit from overheating.

[0026] During specific use, the joint 2 is connected to the drill pipe. When the drill pipe drives the drill bit to rotate, the drilling protrusion 3 first contacts the drilled material. Since the area of ​​the drilling protrusion 3 is small, a row of grooves can be drilled in the drilled material, so that the drilled material is broken and incomplete. Then the drilling wing 5 contacts the drilled material and can drill and fragment the material more effortlessly. With the presence of the arc-shaped material guide groove 7, the drilled material is easier to guide upward, making drilling easier. Cooling liquid is injected into the drilled well through the cooling channel formed by the first through hole 6, the second through hole 11 and the third through hole 21, so as to avoid excessive temperature of the drill bit. Example 2

[0027] See attached Figure 3 , which is different from Example 1, is that each drilling wing 5 of the drilling portion is provided with a through hole 4, and the through holes 4 and the drilling protrusions 3 are staggered. The presence of the through holes 4 not only makes the material guiding easier, but also the coolant is discharged through the through holes 4, so that the coolant can fully cover and wet various positions of the drill guide, thereby achieving sufficient cooling of the drill bit.

[0028] During specific use, the joint 2 is connected to the drill rod. When the drill rod drives the drill bit to rotate, the drilling protrusion 3 first contacts the drilled material. Since the area of ​​the drilling protrusion 3 is small, a row of grooves can be drilled in the drilled material, so that the drilled material is broken and incomplete. Then the drilling wing 5 contacts the drilled material and can drill and fragment the material more effortlessly. With the presence of the arc-shaped material guide groove 7, the drilled material is easier to guide upward, making drilling easier. Through the cooling channel formed by the first through hole 6, the second through hole 11 and the third through hole 21, coolant is injected into the drilled well to avoid excessive temperature of the drill bit. And the coolant enters the through hole 4, which can more fully infiltrate the drill bit, thereby achieving a more efficient heat dissipation effect on the drill bit. Example 3

[0029] See attached Figure 4 , which is different from Example 1, is that a fixing block 9 is integrally provided on the outer wall of the support portion 1, and an internal threaded hole 91 is opened on the fixing block 9. When the joint 2 is connected to the drilling rod, the fixing block 9 is fixed to the drilling rod by bolts (a fixing block connected to the fixing block 9 can be welded on the drill rod). After the joint is connected to the drill rod thread, the fixing block 91 is connected to the fixing block on the drill rod by bolts, so that when the drill rod drives the drill bit to rotate, the drill rod and the drill bit will not rotate relative to each other, so that the drill rod and the drill bit will not become tighter and tighter, and the drill bit can be removed more easily.

[0030] During specific use, the joint 2 is used to dock with the drill pipe, and the fixing block 91 is docked with the docking block on the drill pipe using bolts. When the drill pipe drives the drill bit to rotate, the drilling protrusion 3 first contacts the drilled material. Since the area of ​​the drilling protrusion 3 is small, a row of grooves can be drilled in the drilled material, so that the drilled material is broken and incomplete. Then the drilling wing 5 contacts the drilled material and can drill and fragment the material more effortlessly. With the presence of the arc-shaped material guide groove 7, the drilled material is easier to guide upward, making drilling easier. Through the cooling channel formed by the first through hole 6, the second through hole 11 and the third through hole 21, coolant is injected into the drilled well to avoid excessive temperature of the drill bit. The coolant enters the through hole 4 and can more fully infiltrate the drill bit, thereby achieving a more efficient heat dissipation effect on the drill bit. In addition, when the drill pipe drives the drill bit to rotate, there is no relative rotation between the drill pipe and the drill bit, so that the drill pipe and the drill bit will not become tighter and tighter, so that the drill bit is easier to remove.

[0031] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A diamond drill bit for large-diameter drilling construction, comprising a support portion (1), one end of the support portion (1) is provided with a docking portion, and the end of the support portion (1) away from the docking portion is provided with a drilling portion, characterized in that: The drilling portion is provided with a plurality of drilling wings (5), a material guide groove (7) is provided between adjacent drilling wings (5), and a drilling protrusion (3) is integrally provided on the side surface of the drilling wing (5); Each drilling wing (5) of the drilling portion is provided with a through hole (4), and the through holes (4) and the drilling protrusions (3) are distributed in a staggered manner.

2. A large-diameter diamond drill bit for drilling construction according to claim 1, characterized in that: The docking portion is configured as a joint (2), an outer wall of the joint (2) is provided with an external thread, and the joint (2) and the support portion (1) are an integrally formed structure.

3. A large-diameter diamond drill bit for drilling construction according to claim 2, characterized in that: The drilling part and the supporting part (1) are an integrally formed structure.

4. A large-diameter diamond drill bit for drilling construction according to claim 3, characterized in that: The drilling portion is provided with a first through hole (6), the supporting portion (1) is provided with a second through hole (11), the joint (2) is provided with a third through hole (21), and the first through hole (6), the second through hole (11) and the third through hole (21) are connected.

5. A large-diameter diamond drill bit for drilling construction according to claim 1, characterized in that: The intersection of the various surfaces of the drilling wing (5) is pointed.

6. A large-diameter diamond drill bit for drilling construction according to claim 4, characterized in that: A fixing block (9) is integrally provided on the outer wall of the support portion (1), and an internal threaded hole (91) is provided on the fixing block (9). When the joint (2) is butt-jointed with the drilling rod, bolts are used to fix the fixing block (9) and the drilling rod.

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