Diamond reamer

Abstract

The utility model relates to a kind of diamond hole expanders, including outer steel cylinder, inner liner and several hole expanding teeth, the lateral wall of outer steel cylinder is provided with several teeth holes, the hole expanding tooth is one-to-one corresponding and is inserted in the teeth hole, the front end of the hole expanding tooth protrudes to outer steel cylinder, the inner liner is installed in outer steel cylinder, and it is concentrically arranged with outer steel cylinder, the outer wall of the inner liner and the rear end of hole expanding tooth abut. Utilize inner liner, provide support for hole expanding tooth, prevent hole expanding tooth from shrinking into outer steel cylinder under external soil pressure during hole expanding process, simultaneously make that hole expanding tooth can be replaced individually, and maintenance cost is low.

Description

Technical Field

[0001] This utility model relates to the field of drilling equipment technology, and in particular to a diamond reamer. Background Technology

[0002] Drilling reamers are core tools in geological exploration, oil drilling, and trenchless engineering, primarily used to enlarge borehole diameters or trim borehole walls. Current reamers directly weld high-strength, wear-resistant alloy teeth onto their outer wall. For example, application number CN202222074401.4 discloses a diamond reamer with a spirally arranged, arc-shaped disc-shaped blade, where several circular positioning pits for the blades are distributed along a spiral line on the outer surface of the reamer's steel body. The blades are mounted on these positioning pits, and their longitudinal section is circular. This design, welding the reamer teeth and the cylinder into a single unit, makes repair and maintenance extremely difficult after the reamer teeth break, increasing maintenance costs and complexity. Therefore, improvements are needed. Utility Model Content

[0003] Therefore, it is necessary to provide a diamond reamer to address the above problems.

[0004] A diamond reamer includes an outer steel cylinder, an inner liner cylinder, and a plurality of reaming teeth. The side wall of the outer steel cylinder is provided with a plurality of tooth holes, and the reaming teeth are inserted into the tooth holes one by one. The front end of the reaming teeth protrudes out of the outer steel cylinder. The inner liner cylinder is installed inside the outer steel cylinder and is concentrically arranged with the outer steel cylinder. The outer wall of the inner liner cylinder abuts against the rear end of the reaming teeth.

[0005] Preferably, the enlarging tooth includes a tooth root, a tooth cap, and a connecting part. The tooth root is connected to the tooth cap through the connecting part. The tooth cap is conical in shape. The connecting part penetrates the tooth hole. The tooth root is engaged between the outer steel cylinder and the inner liner cylinder.

[0006] Preferably, the toothed hole is inclined downwards.

[0007] Preferably, the lower part of the outer steel cylinder is provided with an external threaded opening, the upper part of the outer steel cylinder is provided with an internal threaded opening, and the inner top of the external threaded opening is provided with a stepped platform for supporting the inner liner cylinder.

[0008] Preferably, the upper end of the inner liner is provided with a hexagonal hole, and a spring washer is provided on the upper end of the inner liner.

[0009] The advantages of this utility model are: by using an inner liner to provide support for the expanding teeth, it prevents the expanding teeth from shrinking into the outer steel cylinder due to external soil pressure during the expanding process, and at the same time, it allows the expanding teeth to be replaced individually, resulting in low maintenance costs. Attached Figure Description

[0010] Figure 1This is a three-dimensional schematic diagram of a diamond reamer as one embodiment;

[0011] Figure 2 This is a schematic diagram of a diamond reamer. Detailed Implementation

[0012] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0013] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0014] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0015] like Figures 1-2As shown, a diamond reamer includes an outer steel cylinder 1, an inner liner 2, and a plurality of reaming teeth 3. The sidewall of the outer steel cylinder 1 is provided with a plurality of toothed holes 11. The reaming teeth 3 are inserted one-to-one into the toothed holes 11, with the front end of each reaming tooth 3 protruding outside the outer steel cylinder 1. The inner liner 2 is installed inside the outer steel cylinder 1 and is concentrically arranged with it. The outer wall of the inner liner 2 abuts against the rear end of each reaming tooth 3. Specifically, in this embodiment, the outer steel cylinder 1 is provided with a plurality of toothed holes 11, through which the reaming teeth 3 are installed. The toothed holes 11 are arranged along the axial direction of the outer steel cylinder 1 in multiple rows, with equal spacing between adjacent rows of toothed holes 11. During assembly, workers first insert the reaming teeth 3 into the outer steel cylinder 1, then extend the ends of the reaming teeth 3 through the tooth holes 11 into the outer steel cylinder 1. Each reaming tooth 3 is inserted into one of the corresponding tooth holes 11. Then, the inner liner 2 is inserted into the outer steel cylinder 1 accordingly. The inner liner 2 provides support for the reaming teeth 3, preventing them from retracting into the outer steel cylinder 1 due to external soil pressure during the reaming process, thus failing to perform its reaming function. Furthermore, when a single reaming tooth 3 is damaged, the user only needs to replace the damaged tooth 3, making maintenance extremely convenient and quick. The inner liner 2 is coaxial with the outer steel cylinder 1, so it will not affect the flow of drill rod or cooling water.

[0016] like Figure 2 As shown, the enlarging tooth 3 includes a tooth root 31, a tooth cap 32, and a connecting part 33. The tooth root 31 is connected to the tooth cap 32 through the connecting part 33. The tooth cap 32 is conical in shape. The connecting part 33 penetrates the tooth hole 11. The tooth root 31 is engaged between the outer steel cylinder 1 and the inner liner cylinder 2. Specifically, the diameter of the tooth root 31 is larger than that of the tooth hole 11, thus serving as a stop. The connecting part 33 penetrates the tooth hole 11, and a tooth cap 32 is provided at the outer end of the connecting part 33. The tooth cap 32 is made of tungsten carbide, which is wear-resistant, has a hardness close to that of diamond, and has a long service life.

[0017] like Figures 1-2 As shown, the toothed hole 11 is inclined downwards. When the enlarging tooth 3 is assembled, the enlarging tooth 3 can be assembled in the toothed hole 11 by its own weight, so as to prevent the enlarging tooth 3 from retracting from the toothed hole 11. This ensures that when the inner liner 2 is assembled later, the inner liner 2 is blocked by the enlarging tooth 3, so that the inner liner 2 cannot reach the inner bottom of the outer steel cylinder 1, thus ensuring that the inner liner 2 can be assembled in place.

[0018] like Figures 1-2 As shown, the lower part of the outer steel cylinder 1 is provided with an external threaded port 12, and the upper part of the outer steel cylinder 1 is provided with an internal threaded port 13. The inner top of the external threaded port 12 is provided with a stepped platform for supporting the inner liner cylinder 2. Specifically, the outer steel cylinder 1 is connected to the drill bit (not shown in the figure) and drill rod (not shown in the figure) through the external threaded port 12 and the internal threaded port 13. The stepped platform supports the inner liner cylinder 2 to prevent the inner liner cylinder 2 from sinking.

[0019] like Figure 1 As shown, the upper end of the inner liner 2 is provided with a hexagonal hole, and a spring washer is placed on the upper end of the inner liner 2. Specifically, by using a hexagonal wrench to engage with the upper end of the inner liner 2, the inner liner 2 is screwed on to assemble it into the inner bottom of the outer steel cylinder 1. The spring washer is used to match the drill rod screwed on the upper end of the outer steel cylinder 1 to compensate for axial clearance.

[0020] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A diamond reamer, characterized in that: It includes an outer steel cylinder, an inner liner cylinder, and several enlarging teeth. The side wall of the outer steel cylinder is provided with several tooth holes, and the enlarging teeth are inserted into the tooth holes one by one. The front end of the enlarging teeth protrudes out of the outer steel cylinder. The inner liner cylinder is installed inside the outer steel cylinder and is concentrically arranged with the outer steel cylinder. The outer wall of the inner liner cylinder abuts against the rear end of the enlarging teeth.

2. The diamond reamer as described in claim 1, characterized in that: The enlarging tooth includes a tooth root, a tooth cap, and a connecting part. The tooth root is connected to the tooth cap through the connecting part. The tooth cap is conical in shape. The connecting part penetrates the tooth hole. The tooth root is engaged between the outer steel cylinder and the inner liner cylinder.

3. A diamond reamer as described in claim 2, characterized in that: The toothed holes are inclined downwards.

4. A diamond reamer as described in claim 1, characterized in that: The lower part of the outer steel cylinder is provided with an external threaded port, and the upper part of the outer steel cylinder is provided with an internal threaded port. The inner top of the external threaded port is provided with a stepped platform for supporting the inner liner cylinder.

5. A diamond reamer as described in claim 1, characterized in that: The upper end of the inner liner is provided with a hexagonal hole, and a spring washer is provided on the upper end of the inner liner.

Images