Special tool for marking internal thread spigot of petroleum drilling tool

Abstract

The utility model relates to the petroleum drilling tool processing field, and discloses a petroleum drilling tool internal thread spigot marking special tool comprising a tool body, the tool body comprises a first vertical part and a second vertical part, the first vertical part and the second vertical part are connected through an S-shaped bending part, the first vertical part is sleeved with a rubber sleeve, and the second vertical part is sleeved with a rubber sleeve. A mounting groove is formed in the bottom end of the second vertical part, a replaceable bushing is detachably mounted in the mounting groove, a steel character head is arranged in the replaceable bushing, a first threaded hole is formed in one side wall of the second vertical part, a set screw is in threaded connection with the interior of the first threaded hole, a conical surface is arranged on one side of the inner wall of the replaceable bushing, and a second threaded hole is formed in the other side of the inner wall of the replaceable bushing; the front end of a set screw penetrates through the second threaded hole to fix the steel character head in the replaceable lining, and meanwhile the replaceable lining is fixed in the mounting groove of the second vertical part. Due to the adoption of the design of the replaceable bushing, the matched bushing can be replaced according to the spigot tapers of threads with different specifications, and the application range of the tool is widened.

Description

Technical Field

[0001] This utility model relates to the field of oil drilling tool processing, and in particular to a special tool for marking the internal thread stop of oil drilling tools. Background Technology

[0002] According to API standards, after completing the cold rolling and unraveling torque tests on oil drilling tools, the markings "cw" or "MB" must be stamped on the internal thread taper hole (stop position). Currently, workers typically use a steel stamp head and a hammer to strike the stamp vertically. However, due to the space limitations of the internal thread stop, it is difficult to ensure vertical force during striking, resulting in unclear stamps, especially on small-diameter threads, which seriously affects the product's appearance quality. To solve this problem, some improvements have been proposed in the prior art. For example, patent CN218776448U discloses a manual stamping clamping tool for the internal thread stop of drilling tools. This tool adopts a curved body structure, fixing the steel stamp head with a set screw and a magnet, and using a rubber partition to protect the thread sealing surface. Although this solution can ensure the vertical striking of the steel stamp head to a certain extent, its structural design still has limitations. The fixing method of the steel stamp head is relatively fixed, making it difficult to adjust according to the taper of the stop for different thread specifications, resulting in poor versatility. Therefore, a special tool for marking the stop of internal threads on oil drilling tools was developed. Utility Model Content

[0003] Therefore, the purpose of this utility model is to provide a special tool for marking the internal thread stop of oil drilling tools, so as to solve the problems pointed out in the background art.

[0004] To achieve the aforementioned objectives of this utility model, the technical solution adopted is as follows:

[0005] A special tool for marking the internal thread stop of oil drilling tools includes a tool body, which comprises a first vertical part and a second vertical part, connected by an S-shaped bend. A rubber sleeve is fitted on the first vertical part, and an installation groove is provided at the bottom of the second vertical part. A replaceable bushing is detachably installed in the installation groove, and a steel letter head is provided in the replaceable bushing. A first threaded hole is provided on one side wall of the second vertical part, and a set screw is threaded into the first threaded hole. A conical surface is provided on one side of the inner wall of the replaceable bushing, and a second threaded hole is provided on the other side of the inner wall. The front end of the set screw passes through the second threaded hole and fixes the steel letter head in the replaceable bushing, while simultaneously fixing the replaceable bushing in the installation groove of the second vertical part.

[0006] As a further improvement of this utility model, the tapered surface of the replaceable bushing is consistent with the taper of the internal thread stop of the oil drilling tool.

[0007] As a further improvement of this utility model, the outer surface of the rubber sleeve is provided with anti-slip texture to enhance grip stability during operation.

[0008] As a further improvement of this utility model, the end of the steel letterhead is provided with the letters "cw" or "MB".

[0009] As a further improvement of this utility model, a hammer-bearing plate is fixed to the top of the first vertical part, and the diameter of the hammer-bearing plate is larger than the diameter of the first vertical part, so as to increase the force-bearing area during hammering.

[0010] As a further improvement of this utility model, the outer wall of the replaceable bushing and the mounting groove of the second vertical part are interference fit.

[0011] As a further improvement of this utility model, the outer wall of the replaceable bushing and the mounting groove of the second vertical part are threaded together.

[0012] The beneficial effects of this utility model are as follows: This utility model adopts a replaceable bushing design, allowing for the replacement of matching bushings according to the taper of the stop face of different thread specifications, thus improving the tool's applicability and overcoming the limitations of existing fixed steel-head tools. Furthermore, the tapered surface design of the replaceable bushing ensures that the end of the steel head fits tightly against the internal thread stop face during marking, preventing the steel head from shifting and damaging the thread sealing surface, thereby improving product yield. In addition, the replaceable bushing and the mounting groove can be connected by interference fit or thread, facilitating disassembly and maintenance and adapting to different working conditions. Attached Figure Description

[0013] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a partial structural schematic diagram of the present invention;

[0016] Figure 3 This is a schematic diagram of the structure in Embodiment 3 of this utility model.

[0017] In the diagram: 1. Tool body, 2. First vertical part, 3. Second vertical part, 4. S-shaped bend, 5. Rubber sleeve, 6. Mounting groove, 7. Replaceable bushing, 8. Steel letter head, 9. Set screw, 10. Conical surface, 11. Hammering plate. Detailed Implementation

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0020] Example 1

[0021] like Figure 1-2 As shown, a special tool for marking the internal thread stop of an oil drilling tool includes a tool body 1. The tool body 1 includes a first vertical part 2 and a second vertical part 3, which are connected by an S-shaped bend 4. A rubber sleeve 5 is fitted on the first vertical part 2. An installation groove 6 is provided at the bottom end of the second vertical part 3. A replaceable bushing 7 is detachably installed in the installation groove 6. A steel letter head 8 is provided in the replaceable bushing 7. A first threaded hole is provided on one side wall of the second vertical part 3, and a set screw 9 is threaded into the first threaded hole. A conical surface 10 is provided on one side of the inner wall of the replaceable bushing 7, and a second threaded hole is provided on the other side of the inner wall. The front end of the set screw 9 passes through the second threaded hole and fixes the steel letter head 8 in the replaceable bushing 7, while fixing the replaceable bushing 7 in the installation groove 6 of the second vertical part 3.

[0022] Example 2

[0023] Based on the structure of Embodiment 1, in Embodiment 2, the tapered surface 10 of the replaceable bushing 7 is consistent with the taper of the internal thread stop of the oil drilling tool.

[0024] The outer surface of the rubber sleeve 5 is provided with anti-slip texture to enhance grip stability during operation.

[0025] The end of the steel letter 8 is marked with the letters "cw" or "MB".

[0026] Example 3

[0027] Based on the structure of Example 1, in Example 3, as follows: Figure 3 As shown, a hammer-bearing plate 11 is fixed to the top of the first vertical part 2, and the diameter of the hammer-bearing plate 11 is larger than the diameter of the first vertical part 2 to increase the force-bearing area during hammering.

[0028] The outer wall of the replaceable bushing 7 and the mounting groove 6 of the second vertical part 3 are either interference fit or threaded connection.

[0029] The operating steps for using this utility model are as follows:

[0030] 1. Select a replaceable bushing 7 that matches the taper of the thread stop, and install the steel letterhead 8 into the bushing, making sure it fits snugly against the tapered surface 10.

[0031] 2. Secure the steel letterhead 8 and bushing to the body using set screw 9.

[0032] 3. Place the tool close to the threaded end face, hold the rubber sleeve 5, and use the hammer to vertically strike the upper end face of the body to complete the marking.

[0033] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, component disassembly or combination, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A tool for marking a pin end of a petroleum drill tool box thread, characterized by: The tool body includes a first vertical section and a second vertical section, which are connected by an S-shaped bend. A rubber sleeve is fitted on the first vertical section, and a mounting groove is provided at the bottom of the second vertical section. A replaceable bushing is detachably installed in the mounting groove, and a steel letter head is provided inside the replaceable bushing. A first threaded hole is provided on one side wall of the second vertical section, and a set screw is threaded into the first threaded hole. A conical surface is provided on one side of the inner wall of the replaceable bushing, and a second threaded hole is provided on the other side of the inner wall. The front end of the set screw passes through the second threaded hole and fixes the steel letter head inside the replaceable bushing, while simultaneously fixing the replaceable bushing in the mounting groove of the second vertical section.

2. A tool for marking a pin of a petroleum drill tool box thread, according to claim 1, characterized in that: The tapered surface of the replaceable bushing is consistent with the taper of the internal thread stop of the oil drilling tool.

3. A tool for marking a pin of a petroleum drill tool box thread, according to claim 1, characterized in that: The outer surface of the rubber sleeve is provided with anti-slip texture.

4. A special tool for marking the stop of internal threads on oil drilling tools according to claim 1, characterized in that: The steel letterhead has "cw" or "MB" printed at the end.

5. The tool for marking the butt of the internal thread of the petroleum drilling tool according to claim 1, characterized in that: A hammer-bearing plate is fixed to the top of the first vertical part, and the diameter of the hammer-bearing plate is larger than the diameter of the first vertical part.

6. A tool for marking a pin of a petroleum drill tool box thread, according to claim 1, characterized in that: The outer wall of the replaceable bushing and the mounting groove of the second vertical part are interference fit.

7. A tool for marking a pin of a petroleum drill tool box thread, according to claim 1, characterized in that: The outer wall of the replaceable bushing is threadedly connected to the mounting groove of the second vertical part.

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