Bore gauge for casing thread measurement

Abstract

This utility model relates to a boring template device for measuring the thread of oil casing pipes. The technical solution includes a main scale and a vernier scale. The main scale has upper and lower measuring jaws on its upper and lower ends, respectively. The upper edge of the main scale body has a lower inner diameter limit scale and an upper inner diameter limit scale. A vernier scale is fitted onto the main scale body. The left end of the vernier scale body has upper and lower measuring jaws, and the left end faces of the upper and lower measuring jaws are not on the same vertical line. The horizontal difference between the two is the boring limit difference. The beneficial effect is that by moving the position of the vernier scale body, it is possible to quickly determine in batches whether the bore opening of the corresponding product is too small or too large. Since the left end faces are not on the same vertical line, the difference is fixed, making it suitable for measuring the inner diameter of bores of various products with consistent boring tolerances, significantly improving measurement efficiency.

Description

Technical Field

[0001] This utility model relates to the field of oil casing thread measurement technology in the oil and gas industry, and in particular to a boring template device for measuring oil casing threads. Background Technology

[0002] In the petroleum industry, casing and tubing are important production equipment. In the API SPEC 5B standard, NU, EU, SC, and LC threaded couplings all have bore diameters. Special threads are generally bored to ensure that the inner hole is flush after screwing to prevent turbulence during oil and gas transportation. Manufacturers usually use vernier calipers to measure during production. However, measuring each piece individually during mass production affects the inspection speed. Therefore, some manufacturers will track different specifications and thread types and customize go / no-go bore patterns. Multiple thread types, specifications, and wall thicknesses require multiple patterns to be processed. For production companies, processing patterns in this way is a waste of costs.

[0003] Our company filed Chinese patent application No. 2025211005892 on May 30, 2025, entitled "An Adjustable Boring Template Measuring Device", which includes a main scale, an upstream gauge sleeve, a downstream gauge sleeve, and an anti-detachment block. The left end of the main scale is the measuring end, with an upper measuring jaw at the top and a lower measuring jaw at the bottom. A mounting notch is provided in the middle of the main scale, dividing the main scale into an upper main scale body and a lower main scale body. The upstream gauge sleeve is fitted onto the upper main scale body, and the downstream gauge sleeve is fitted onto the lower main scale body. The upper tolerance of the boring hole is set by the distance between the upstream gauge sleeve and the upper measuring jaw, and the lower tolerance of the boring hole is set by the distance between the downstream gauge sleeve and the lower measuring jaw. An anti-detachment block is installed at the right end of the main scale to prevent the upstream and downstream gauge sleeves from detaching. This utility model patent can save the cost of processing boring templates of various specifications, and can also quickly determine whether the inner diameter of the hole at the pipe end or coupling end of the product is qualified, thus improving the inspection efficiency.

[0004] This invention provides another solution that can also measure boring holes. It has a simple structure, long service life, and improves inspection efficiency. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned deficiencies in the existing technology by providing a boring template device for measuring oil casing thread. This device has a simple structure, long service life, and can quickly perform measurement and judgment, thereby achieving the goal of reducing costs and accelerating measurement.

[0006] The present invention discloses a boring template device for measuring the thread of an oil casing pipe. The technical solution is as follows: it includes a main scale (1) and a vernier scale (2). The main scale (1) includes an upper measuring jaw (1.1), a lower measuring jaw (1.2), a main scale end (1.3), a main scale body (1.4), a lower inner diameter scale (1.6), and an upper inner diameter scale (1.7). A main scale end (1.3) is provided at one end of the main scale body (1.4). The upper measuring jaw (1.1) and lower measuring jaw (1.2) are respectively provided on the upper and lower sides of the main scale end (1.3). A lower inner diameter scale (1.6) is provided on the upper edge of the main scale body (1.4), and an upper inner diameter scale (1.7) is provided on the lower edge of the main scale body (1.4). The scale is limited (1.7); a vernier scale (2) is fitted onto the main scale body (1.4); the vernier scale (2) includes a vernier scale body (2.1), a vernier scale upper jaw (2.2), and a vernier scale lower jaw (2.3). The vernier scale upper jaw (2.2) is provided on the upper left side of the vernier scale body (2.1), and the vernier scale lower jaw (2.3) is provided on the lower left side of the vernier scale body (2.1). The left end faces of the vernier scale upper jaw (2.2) and the vernier scale lower jaw (2.3) are not on the same vertical line, and the horizontal difference between the two is the boring limit difference (a); the vernier scale first graduation (2.6) and the vernier scale second graduation (2.7) are provided on the upper and lower sides of the vernier scale body (2.1), respectively.

[0007] Preferably, the upper left side of the main scale upper measuring jaw (1.1) is provided with an upper cutting edge (1.8), and the lower left side of the main scale lower measuring jaw (1.2) is provided with a lower cutting edge (1.9), and the cutting edges of both extend to the left.

[0008] Preferably, an anti-detachment screw (1.5) is provided at the other end of the main scale body (1.4) to prevent the vernier scale (2) from falling off.

[0009] Preferably, an upper locking screw (2.4) is provided at the upper edge of the vernier scale body (2.1), and a lower locking screw (2.5) is provided at the lower edge of the vernier scale body (2.1).

[0010] Preferably, a vernier upper cutting edge (2.8) is provided on the right side of the vernier upper measuring jaw (2.2), and a vernier lower cutting edge (2.9) is provided on the right side of the vernier lower measuring jaw (2.3).

[0011] Preferably, the vernier scale body (2.1) has a rectangular groove (2.12) in the middle, the vertical width of the groove (2.12) being greater than the width of the main scale body (1.4), for fitting around the outside of the main scale body (1.4).

[0012] Preferably, the first scale (2.6) of the vernier scale is located on the upper inclined surface of the vernier scale body (2.1), and the upper edge (2.10) extends downward from the upper inclined surface. The second scale (2.7) of the vernier scale is located on the lower inclined surface of the vernier scale body (2.1), and the lower edge (2.11) extends upward from the lower inclined surface. The upper edge (2.10) and the lower edge (2.11) limit the main scale body (1.4) to slide within the rectangular groove (2.12) in the middle of the vernier scale body (2.1).

[0013] The beneficial effects of this utility model are as follows: By moving the position of the vernier scale body so that the upper cutting edge and the upper cutting edge of the vernier scale are located on the inner wall of the boring hole, the value of the first scale of the vernier scale body is set, the upper tolerance of the boring hole is set, and the upper locking screw is locked, it is possible to quickly determine in batches whether the opening of the boring hole of the corresponding product is too small; similarly, by moving the position of the vernier scale body so that the lower cutting edge and the lower cutting edge of the vernier scale are located on the inner wall of the boring hole, the value of the second scale of the vernier scale body is set, the lower tolerance of the boring hole is set, and the lower locking screw is locked, it is possible to quickly determine in batches whether the opening of the boring hole is too large; because the left end faces of the upper and lower measuring jaws of the vernier scale are not on the same vertical line, and the upper and lower scales of the vernier scale body are not aligned, the difference is fixed, which is suitable for measuring the inner diameter of the boring hole of various products with consistent boring tolerances, greatly improving the measurement efficiency. Attached Figure Description

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

[0015] Figure 2 This is a schematic diagram of the front structure of the main scale;

[0016] Figure 3 This is a schematic diagram of the front structure of the vernier caliper;

[0017] Figure 4 This is a schematic diagram of the side structure of the vernier caliper;

[0018] Figure 5 This is a schematic diagram of the lower limit of the inner diameter of the boring hole according to this utility model;

[0019] Figure 6 This is a schematic diagram of the present invention for measuring the upper limit of the inner diameter of a boring hole;

[0020] In the diagram above: Main scale 1, Vernier scale 2, Boring limit difference a, Main scale upper measuring jaw 1.1, Main scale lower measuring jaw 1.2, Main scale end 1.3, Main scale body 1.4, Anti-loosening screw 1.5, Inner diameter lower limit scale 1.6, Inner diameter upper limit scale 1.7, Upper cutting edge 1.8, Lower cutting edge 1.9, Vernier scale body 2.1, Vernier scale upper measuring jaw 2.2, Vernier scale lower measuring jaw 2.3, Upper locking screw 2.4, Lower locking screw 2.5, Vernier scale first scale 2.6, Vernier scale second scale 2.7, Vernier scale upper cutting edge 2.8, Vernier scale lower cutting edge 2.9, Upper stop edge 2.10, Lower stop edge 2.11, Groove 2.12. Detailed Implementation

[0021] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0022] Example 1, referring to Figures 1-4 This utility model discloses a boring template device for measuring the thread of an oil casing pipe, comprising a main scale 1 and a vernier scale 2. The main scale 1 includes an upper measuring jaw 1.1, a lower measuring jaw 1.2, a main scale end 1.3, a main scale body 1.4, a lower inner diameter scale 1.6, and an upper inner diameter scale 1.7. The main scale end 1.3 is located at one end of the main scale body 1.4. The upper measuring jaw 1.1 and the lower measuring jaw 1.2 are located on the upper and lower sides of the main scale end 1.3, respectively. The lower inner diameter scale 1.6 is located on the upper edge of the main scale body 1.4, and the upper inner diameter scale is located on the lower edge of the main scale body 1.4. 1.7; A vernier scale 2 is fitted onto the main scale body 1.4; the vernier scale 2 includes a vernier scale body 2.1, an upper vernier scale jaw 2.2, and a lower vernier scale jaw 2.3. The upper vernier scale jaw 2.2 is provided on the upper left side of the vernier scale body 2.1, and the lower vernier scale jaw 2.3 is provided on the lower left side of the vernier scale body 2.1. The left end faces of the upper vernier scale jaw 2.2 and the lower vernier scale jaw 2.3 are not on the same vertical line, and the horizontal difference between the two is the boring limit difference a; the first vernier scale 2.6 and the second vernier scale 2.7 are respectively provided on the upper and lower sides of the vernier scale body 2.1.

[0023] Among them, the upper left side of the main scale upper measuring jaw 1.1 is provided with an upper cutting edge 1.8, and the lower left side of the main scale lower measuring jaw 1.2 is provided with a lower cutting edge 1.9, and the cutting edges of both extend to the left.

[0024] An anti-detachment screw 1.5 is provided at the other end of the main scale body 1.4 to prevent the vernier scale 2 from falling off.

[0025] An upper locking screw 2.4 is provided on the upper edge of the vernier scale body 2.1, and a lower locking screw 2.5 is provided on the lower edge of the vernier scale body 2.1.

[0026] A vernier upper cutting edge 2.8 is provided on the right side of the vernier upper measuring jaw 2.2, and a vernier lower cutting edge 2.9 is provided on the right side of the vernier lower measuring jaw 2.3.

[0027] The vernier scale body 2.1 has a rectangular groove 2.12 in the middle. The vertical width of the groove 2.12 is greater than the width of the main scale body 1.4, and it is used to fit around the outside of the main scale body 1.4.

[0028] The first scale mark 2.6 of the vernier scale is located on the upper inclined surface of the vernier scale body 2.1, and the upper edge 2.10 extends downward from the upper inclined surface. The second scale mark 2.7 of the vernier scale is located on the lower inclined surface of the vernier scale body 2.1, and the lower edge 2.11 extends upward from the lower inclined surface. The upper edge 2.10 and the lower edge 2.11 limit the main scale body 1.4 to slide within the rectangular groove 2.12 in the middle of the vernier scale body 2.1.

[0029] When using this utility model, refer to Figure 5 By moving the position of the vernier scale body 2.1, the upper cutting edge 1.8 and the upper cutting edge 2.8 of the vernier scale are located on the inner wall of the boring hole. The value of the first scale 2.6 of the vernier scale body 2.1 is set to determine the upper tolerance of the boring hole. The upper locking screw 2.4 is then locked. This allows for quick batch determination of whether the opening of the boring hole of the corresponding product is too small.

[0030] Similarly, refer to Figure 6 By moving the position of the vernier scale body 2.1, the lower cutting edge 1.9 and the lower cutting edge 2.9 of the vernier scale are positioned on the inner wall of the boring hole. The value of the second scale 2.7 of the vernier scale body 2.1 is set to determine the lower tolerance of the boring hole. The lower locking screw 2.5 is then locked, allowing for rapid batch determination of whether the bore opening is too large. Regardless of whether the value of the first scale 2.6 or the second scale 2.7 of the vernier scale is set first, since the left end faces of the upper measuring jaw 2.2 and the lower measuring jaw 2.3 of the vernier scale are not on the same vertical line, the horizontal difference between the two is the boring limit difference a, which is the difference between the upper and lower limits of the inner diameter of the boring hole. At this time, the boring limit difference a has been set to a fixed value. As long as the locking screw is tightened, the diameter of the boring hole can be quickly determined in batches.

[0031] This utility model can design several boring limit differences 'a' that can cover a variety of products according to product classification, which can save factories from making boring templates for products of different specifications and wall thicknesses, thus reducing costs for manufacturing enterprises.

[0032] The above description is merely a preferred embodiment of this utility model. Any person skilled in the art may modify this utility model or modify it into an equivalent technical solution using the technical solutions described above. Therefore, any simple modifications or equivalent transformations made based on the technical solutions of this utility model are within the scope of protection claimed by this utility model.

Claims

1. A boring template device for measuring the thread of an oil casing pipe, comprising a main scale (1) and a vernier scale (2), characterized in that: The main scale (1) includes an upper measuring jaw (1.1), a lower measuring jaw (1.2), a main scale end (1.3), a main scale body (1.4), a lower inner diameter scale (1.6), and an upper inner diameter scale (1.7). A main scale end (1.3) is located at one end of the main scale body (1.4). The upper measuring jaw (1.1) and lower measuring jaw (1.2) are located on the upper and lower sides of the main scale end (1.3), respectively. A lower inner diameter scale (1.6) is located on the upper edge of the main scale body (1.4), and an upper inner diameter scale (1.7) is located on the lower edge of the main scale body (1.4). A main scale body (1.4) is fitted with… A vernier scale (2) is provided; the vernier scale (2) includes a vernier scale body (2.1), a vernier scale upper jaw (2.2), and a vernier scale lower jaw (2.3). The vernier scale upper jaw (2.2) is provided on the upper left side of the vernier scale body (2.1), and the vernier scale lower jaw (2.3) is provided on the lower left side of the vernier scale body (2.1). The left end faces of the vernier scale upper jaw (2.2) and the vernier scale lower jaw (2.3) are not on the same vertical line, and the horizontal difference between the two is the boring limit difference (a). The vernier scale first graduation (2.6) and vernier scale second graduation (2.7) are provided on the upper and lower sides of the vernier scale body (2.1), respectively.

2. The boring template device for measuring oil casing threads according to claim 1, characterized in that: The upper left side of the main scale upper measuring jaw (1.1) is provided with an upper cutting edge (1.8), and the lower left side of the main scale lower measuring jaw (1.2) is provided with a lower cutting edge (1.9), and both cutting edges extend to the left.

3. The boring template device for measuring oil casing threads according to claim 2, characterized in that: in The other end of the main scale body (1.4) is provided with an anti-detachment screw (1.5) to prevent the vernier scale (2) from falling off.

4. The boring template device for measuring oil casing threads according to claim 3, characterized in that: in The upper edge of the vernier scale body (2.1) is provided with an upper locking screw (2.4), and the lower edge of the vernier scale body (2.1) is provided with a lower locking screw (2.5).

5. The boring template device for measuring oil casing threads according to claim 4, characterized in that: in The upper vernier jaw (2.2) has an upper vernier cutting edge (2.8) on the right side, and the lower vernier jaw (2.3) has a lower vernier cutting edge (2.9) on the right side.

6. The boring template device for measuring oil casing threads according to claim 5, characterized in that: The vernier scale body (2.1) has a rectangular groove (2.12) in the middle. The vertical width of the groove (2.12) is greater than the width of the main scale body (1.4) and is used to fit around the outside of the main scale body (1.4).

7. The boring template device for measuring oil casing threads according to claim 6, characterized in that: The first scale (2.6) of the vernier scale is located on the upper inclined surface of the vernier scale body (2.1), and the upper edge (2.10) extends downward from the upper inclined surface. The second scale (2.7) of the vernier scale is located on the lower inclined surface of the vernier scale body (2.1), and the lower edge (2.11) extends upward from the lower inclined surface. The upper edge (2.10) and the lower edge (2.11) limit the main scale body (1.4) to slide within the rectangular groove (2.12) in the middle of the vernier scale body (2.1).

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