A rotary drilling rig bit with a detachable helical blade reinforcement structure

Abstract

This utility model relates to the field of rotary drilling bit technology and discloses a rotary drilling rig bit with a detachable helical blade reinforcement structure. This rotary drilling rig bit with a detachable helical blade reinforcement structure includes a drill bit body and helical blades. The outer side of the drill bit body has vertically equidistant helical grooves that are adapted to the helical blades. This device has advantages such as a detachable helical blade design, structural reinforcement, resolution of high-temperature welding issues, and stable material strength. It solves the problems of traditional rotary drilling bits where the outer helical blades are mostly integrally formed or welded to the drill bit body, requiring replacement of the entire drill bit after wear or breakage, making individual repair impossible. Furthermore, the welded area is prone to fatigue cracks due to impact loads, and the high welding temperature causes material grain coarsening, leading to a decrease in shear strength.

Description

Technical Field

[0001] This utility model relates to the field of rotary drilling bit technology, specifically a rotary drilling rig bit with a detachable helical blade reinforcement structure. Background Technology

[0002] As a core piece of equipment for foundation engineering construction, the performance of rotary drilling rigs directly affects construction efficiency and cost. Traditional rotary drilling rigs often have their outer helical blades integrally formed or welded to the drill bit body. When the helical blades wear out or break, the entire drill bit must be replaced, as it cannot be repaired separately. The welded area is prone to fatigue cracks due to impact loads, and the high temperature of welding causes material grain coarsening, resulting in a decrease in shear strength.

[0003] In summary, a rotary drilling rig bit with a detachable helical blade reinforcement structure is proposed to solve the above problems. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a rotary drilling rig bit with a detachable helical blade reinforced structure. It has the advantages of detachable helical blade design, structural reinforcement, and resolution of high-temperature welding issues, while maintaining stable material strength. It solves the problems of traditional rotary drilling bits where the outer helical blades are mostly integrally formed or welded to the drill bit body, requiring the entire drill bit to be replaced after the helical blades wear or break, making individual repair impossible. Furthermore, the welded area is prone to fatigue cracks due to impact loads, and the high temperature of welding causes material grain coarsening, leading to a decrease in shear strength.

[0006] (II) Technical Solution

[0007] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A rotary drilling rig drill bit with a detachable spiral blade reinforcement structure includes a drill bit body and a spiral blade. The outer side of the drill bit body is provided with spiral grooves that are vertically and equally distributed and adapted to the spiral blades. The upper and lower side walls of the spiral grooves are provided with a number of trapezoidal tenon grooves. The bottom of the spiral grooves is provided with a number of threaded holes along its length. The upper and lower side walls of the spiral blades are provided with trapezoidal tenons that are adapted to the trapezoidal tenon grooves. The surface of the spiral blades is provided with a number of countersunk holes that are adapted to the threaded holes along its length. The interior of each countersunk hole is provided with a high-strength bolt that passes through the spiral blade and is threadedly connected to the threaded hole.

[0008] The beneficial effects of this utility model are:

[0009] This rotary drilling rig bit with a detachable spiral blade reinforced structure aligns the trapezoidal tenon of the spiral blade with the trapezoidal tenon groove on the spiral groove, and then inserts the spiral blade into the spiral groove. High-strength bolts are then passed through the countersunk holes on the surface of the spiral blade and screwed into the threaded holes at the bottom of the spiral groove, achieving a secure connection. It features quick disassembly of the spiral blade, the fit between the trapezoidal tenon and the trapezoidal tenon groove, and the connection of high-strength bolts, providing multi-directional locking force, enhancing shear and impact resistance, reducing the risk of fatigue cracks, eliminating high-temperature welding issues, and maintaining stable material strength.

[0010] Based on the above technical solution, the present invention can be further improved as follows.

[0011] Furthermore, a polyurethane gasket, which is compatible with both the spiral groove and the counterbore, is bonded between the root of the spiral blade and the drill bit body.

[0012] The beneficial effect of adopting the above-mentioned further solutions is that polyurethane gaskets can effectively absorb vibration and impact during construction, thereby extending the life of the spiral blades.

[0013] Furthermore, each of the spiral grooves is segmented and installed with four spiral blades along the axial direction.

[0014] The advantages of adopting the above-mentioned further solutions are that the helical blades are modular and segmented, and only the damaged section needs to be replaced when there is local damage, which improves construction efficiency and reduces material waste.

[0015] Furthermore, the spiral blades are made of low-alloy high-strength structural steel.

[0016] The beneficial effect of adopting the above-mentioned further solutions is that the application of low-alloy high-strength structural steel ensures the wear resistance of the spiral blades in hard strata and extends the overall service life of the drill bit. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is an assembly diagram of the present invention;

[0019] Figure 3 This is an enlarged schematic diagram of the structure at point a of this utility model;

[0020] Figure 4 This is an enlarged schematic diagram of the structure at point b of this utility model;

[0021] Figure 5 This is an enlarged schematic diagram of the structure at point c of this utility model.

[0022] In the diagram: 1. Drill bit body; 2. Spiral blade; 3. Spiral groove; 4. Trapezoidal tenon; 5. Threaded hole; 6. Trapezoidal tenon; 7. Countersunk hole; 8. High-strength bolt; 9. Polyurethane gasket. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] In the embodiments, by Figure 1-5 This invention discloses a rotary drilling rig bit with a detachable helical blade reinforcement structure. The bit bit includes a bit body 1 and a helical blade 2. The outer side of the bit body 1 is provided with helical grooves 3 that are vertically and equally distributed and adapted to the helical blade 2. The upper and lower side walls of the helical grooves 3 are provided with a number of trapezoidal tenon grooves 4. The bottom of the helical grooves 3 is provided with a number of threaded holes 5 along its length. The upper and lower side walls of the helical blade 2 are provided with trapezoidal tenons 6 that are adapted to the trapezoidal tenon grooves 4. The surface of the helical blade 2 is provided with a number of countersunk holes 7 that are adapted to the threaded holes 5 along its length. The interior of each countersunk hole 7 is provided with a high-strength bolt 8 that passes through the helical blade 2 and is threadedly connected to the threaded hole 5.

[0025] The root of the spiral blade 2 and the drill bit body 1 are both bonded with polyurethane gaskets 9 that are compatible with the spiral groove 3 and the countersunk hole 7.

[0026] Each spiral groove 3 is divided into four spiral blades 2 along the axial direction;

[0027] The material of the spiral blade 2 is low-alloy high-strength structural steel.

[0028] Working principle:

[0029] Step 1: Align the trapezoidal tenon 6 of the spiral blade 2 with the trapezoidal tenon 4 on the spiral groove 3, and then install the spiral blade 2 into the spiral groove 3. Then, pass the high-strength bolt 8 through the countersunk hole 7 on the surface of the spiral blade 2 and screw it into the threaded hole 5 at the bottom of the spiral groove 3 to achieve a firm connection.

[0030] Step 2: The polyurethane gasket 9 can effectively absorb vibration and impact during construction, thereby extending the life of the spiral blade 2.

[0031] Step 3: The spiral blades are modularly segmented, so that only the damaged section needs to be replaced when there is local damage, which improves construction efficiency and reduces material waste.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rotary drilling rig drill bit of detachable auger blade reinforcing structure, comprising a drill bit body (1) and an auger blade (2), characterized in that: The outer side of the drill bit body (1) is provided with spiral grooves (3) that are vertically and equally distributed and adapted to the spiral blades (2). The upper and lower side walls of the spiral grooves (3) are provided with several trapezoidal tenons (4). The bottom of the spiral grooves (3) is provided with several threaded holes (5) along its length. The upper and lower side walls of the spiral blades (2) are provided with trapezoidal tenons (6) that are adapted to the trapezoidal tenons (4). The surface of the spiral blades (2) is provided with several countersunk holes (7) that are adapted to the threaded holes (5) along its length. The interior of each countersunk hole (7) is provided with a high-strength bolt (8) that passes through the spiral blades (2) and is threadedly connected to the threaded holes (5).

2. The rotary drilling rig drill bit of claim 1, wherein: The root of the spiral blade (2) and the drill bit body (1) are bonded with polyurethane gaskets (9) that are compatible with the spiral groove (3) and the countersunk hole (7).

3. The rotary drilling rig drill bit of claim 2, wherein: Each of the spiral grooves (3) is segmented along the axial direction with four spiral blades (2).

4. The rotary drilling rig bit with a detachable helical blade reinforcement structure according to claim 3, characterized in that: The spiral blade (2) is made of low-alloy high-strength structural steel.

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