Thread axis irregularity measuring meter

Abstract

The utility model discloses a thread axis irregularity measuring meter. According to the technical scheme, an outer ruler measuring conical surface is arranged on the upper portion of the right side of an outer ruler body, a dial indicator body is installed on the upper middle portion of the outer ruler body through a dial indicator fixing screw, and the lower middle portion of the outer ruler body is movably connected with two sliding cylinders on the left side of an inner ruler body and fastened through sliding cylinder fixing screws. The outer ruler measuring conical surface and the upper portion of the inner ruler body make contact with external threads at the end of the oil casing, scales are arranged on the outer surface of the sliding cylinder, and an inner ruler handle is fixed to the right side of the inner ruler body. The utility model has the beneficial effects that the burden of on-site inspection is reduced, the measurement can be carried out at any time, the constraint that the thread axis irregularity can be measured only by measuring the standoff by using a ring gauge is avoided, and the effective guarantee is provided for ensuring the product quality of the oil casing.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of oil casing machining, particularly to a thread axis misalignment measuring table. BACKGROUND

[0002] In the petroleum industry, oil casing is an important exploitation tool, wherein, the indexes of the oil casing are mainly full-length straightness, pipe end straightness, thread axis misalignment and the like, if the deviation of the full-length straightness is large and the deviation of the thread axis misalignment is large, it may cause the curvature of the downhole string borehole to be too large, and in severe cases, it may cause the downhole string to fail prematurely, such as the premature failure of the packer, the aggravation of the eccentric wear of the pipe rod, the aggravation of the clearance wear of the oil pump, and the piston failing to enter the pump cylinder during operation and construction. Many enterprises will increase the inspection requirements of the full-length straightness, the pipe end straightness and the thread axis misalignment when producing downhole products such as oil casing, but when measuring the outer thread axis misalignment, no special measuring tool is available, and the assistance of a ring gauge is required to measure the thread axis misalignment, in the specific measurement, after the ring gauge is used to measure the close-fit distance, a vernier caliper is used to measure the distance between the inner wall of the end outer thread of the oil casing and the outer circle of the ring gauge, the maximum point and the minimum point in a circle are found, and then the difference is calculated, and the difference cannot exceed an internal specified value. SUMMARY

[0003] The utility model discloses a thread axis misalignment measuring table, which can relieve the burden of on-site inspection, can measure at any time, is not restricted by the need to use a ring gauge to measure the close-fit distance to measure the thread axis misalignment, and provides effective guarantee for the product quality of the oil casing.

[0004] The technical scheme is as follows: an outer ruler body (1), an outer ruler measuring conical surface (2), an inner ruler body (3), a dial gauge body (4), an inner ruler handle (6), a sliding cylinder (7), a sliding cylinder fixing screw (8), a dial gauge fixing screw (9), the right side upper portion of the outer ruler body (1) is provided with the outer ruler measuring conical surface (2), the dial gauge body (4) is installed on the middle upper portion of the outer ruler body (1) through the dial gauge fixing screw (9), the middle lower portion of the outer ruler body (1) is movably connected with the two sliding cylinders (7) on the left side of the inner ruler body (3), and the position is fastened through the sliding cylinder fixing screw (8), the end outer thread (10) of the oil casing is contacted through the outer ruler measuring conical surface (2) and the upper portion of the inner ruler body (3), the outer surface of the sliding cylinder (7) is provided with a scale, and the right side of the inner ruler body (3) is fixed with the inner ruler handle (6).

[0005] Preferably, the middle and lower part of the outer ruler body (1) is provided with a dial gauge mounting hole (1.1), a first sliding cylinder mounting hole (1.2) and a second sliding cylinder mounting hole (1.3), a first fixed screw hole (1.4) is arranged at the upper part of the dial gauge mounting hole (1.2), a second fixed screw hole (1.5) is arranged at the upper part of the first sliding cylinder mounting hole (1.2), and a third fixed screw hole (1.6) is arranged on the second sliding cylinder mounting hole (1.3).

[0006] Preferably, the outer ends of the two sliding cylinders (7) are respectively provided with anti-skid covers (11), and the outer diameter of the anti-skid cover (11) is greater than the outer diameter of the sliding cylinder (7).

[0007] Preferably, the lower part of the left side of the outer ruler body (1) is fixed with an outer ruler handle (5) and is located between the first sliding cylinder mounting hole (1.2) and the second sliding cylinder mounting hole (1.3).

[0008] Preferably, the upper part of the outer ruler body (1) is provided with outer ruler measuring conical surfaces (2) of different sizes.

[0009] Preferably, the outer walls of the outer ruler handle (5) and the inner ruler handle (6) of the outer ruler body (1) are sleeved with anti-skid rubber sleeves.

[0010] The utility model discloses a structure that is simple, convenient and practical, and is suitable for the wall thickness of the end part of the oil jacket pipe of different sizes, and the burden of on-site inspection is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is the whole structure schematic diagram of the utility model discloses;

[0012] Figure 2 It is the front structure schematic diagram of outer ruler body;

[0013] Figure 3 It is the side structure schematic diagram of outer ruler body;

[0014] Figure 4 It is the front structure schematic diagram of inner ruler body;

[0015] Figure 5 is the side structure schematic diagram of the inner ruler body;

[0016] Figure 6 is the structure schematic diagram of the inner ruler body in the top direction;

[0017] Figure 7 is the structure schematic diagram of the dial gauge body;

[0018] Figure 8 is the structure schematic diagram when the utility model is measured;

[0019] In the above figure: outer ruler body 1, outer ruler measuring conical surface 2, inner ruler body 3, dial gauge body 4, outer ruler handle 5, inner ruler handle 6, connecting rod 7, inner and outer ruler fixing bolt 8, dial gauge fixing bolt 9, end outer thread 10, anti-skid cover 11, dial gauge mounting hole 1.1, first sliding cylinder mounting hole 1.2, second sliding cylinder mounting hole 1.3, first fixing screw hole 1.4, second fixing screw hole 1.5, third fixing screw hole 1.6. PREFERRED EMBODIMENT

[0020] The preferred embodiments of the utility model are described below in combination with the drawings, and it should be understood that the preferred embodiments described here are only used for illustrating and explaining the utility model, and are not used for limiting the utility model.

[0021] Embodiment 1, refer to Figures 1-8 The utility model refers to a kind of thread axis misalignment measuring gauge, including outer ruler body 1, outer ruler measuring conical surface 2, inner ruler body 3, dial gauge body 4, inner ruler handle 6, sliding cylinder 7, sliding cylinder fixing screw 8, dial gauge fixing screw 9, the right side upper portion of outer ruler body 1 is equipped with outer ruler measuring conical surface 2, dial gauge body 4 is installed in the middle upper portion of outer ruler body 1 by dial gauge fixing screw 9, the middle lower portion of outer ruler body 1 is movably connected with the two sliding cylinders 7 of the left side of inner ruler body 3, and position is fastened by sliding cylinder fixing screw 8, the end outer thread 10 of oil jacket pipe is contacted by outer ruler measuring conical surface 2 and the upper portion of inner ruler body 3, scale is provided on the outer surface of the sliding cylinder 7, the right side of the inner ruler body 3 is fixed with inner ruler handle 6.

[0022] Among them, the middle lower portion of the above-mentioned outer ruler body 1 is equipped with dial gauge mounting hole 1.1, first sliding cylinder mounting hole 1.2 and second sliding cylinder mounting hole 1.3, first fixing screw hole 1.4 is equipped in the upper portion of dial gauge mounting hole 1.2, second fixing screw hole 1.5 is equipped in the upper portion of first sliding cylinder mounting hole 1.2, and third fixing screw hole 1.6 is equipped on second sliding cylinder mounting hole 1.3.

[0023] Preferably, anti-skid covers 11 are arranged at the outer ends of the two sliding cylinders 7 respectively, and the outer diameter of the anti-skid cover 11 is larger than the outer diameter of the sliding cylinder 7, so as to avoid the two sliding cylinders 7 from sliding out of the outer ruler body 1.

[0024] Preferably, the outer ruler handle 5 is fixed to the left lower part of the outer ruler body 1 and is located between the first sliding cylinder mounting hole 1.2 and the second sliding cylinder mounting hole 1.3.

[0025] In use, the two measuring surfaces of the outer ruler body 1 and the inner ruler body 3 are first pulled apart by a distance, the interval distance is greater than the wall thickness of the end outer thread 10 of the oil casing, the outer ruler measuring cone surface 2 of the outer ruler body 1 is attached to the outer surface of the end outer thread 10, the top of the inner ruler body 3 is attached to the end inner wall of the oil casing, then the two sliding cylinder fixing screws 8 and the dial gauge fixing screw 9 are tightened, so that the interval distance is slightly greater than the wall thickness of the end outer thread 10 of the oil casing; then the outer ruler body 1 and the inner ruler body 3 are kept still, the oil casing is rotated for one turn, the maximum and minimum points of the outer thread are found, and the difference value is calculated, which is the thread axis misalignment; in addition, the dial gauge body 4 is in contact with the surface of the outer thread, so that the size of the outer thread is accurately measured.

[0026] In the embodiment 2, the outer ruler body 1 is provided with the outer ruler measuring cone surface 2 at the upper right part, the dial gauge body 4 is mounted on the middle upper part of the outer ruler body 1 through the dial gauge fixing screw 9, the middle lower part of the outer ruler body 1 is movably connected with the two sliding cylinders 7 on the left side of the inner ruler body 3 through the sliding cylinder fixing screw 8, the outer ruler measuring cone surface 2 is in contact with the end outer thread 10 of the oil casing on the upper part of the inner ruler body 3, the outer surface of the sliding cylinder 7 is provided with a scale, and the inner ruler handle 6 is fixed to the right side of the inner ruler body 3.

[0027] Different from the embodiment 1, the upper part of the outer ruler body 1 is provided with the outer ruler measuring cone surface 2 of different sizes, which can adapt to outer thread structures of different types, and the outer ruler body 1 with the outer ruler measuring cone surface 2 of different sizes can be replaced to be connected with the inner ruler body 3, so that the thread axis misalignment can be measured.

[0028] The utility model discloses a screw axis misalignment measuring table, including outer ruler main body 1, outer ruler measuring conical surface 2, inner ruler main body 3, dial gauge main body 4, inner ruler handle 6, sliding cylinder 7, sliding cylinder fixed screw 8, dial gauge fixed screw 9, the right side upper portion of outer ruler main body 1 is equipped with outer ruler measuring conical surface 2, and the dial gauge main body 4 is installed through dial gauge fixed screw 9 in the upper middle portion of outer ruler main body 1, and the lower middle portion of outer ruler main body 1 is movably connected with the two sliding cylinders 7 of inner ruler main body 3 left side, and is fastened position through sliding cylinder fixed screw 8, and the end portion outer thread 10 of oil jacket pipe is contacted through outer ruler measuring conical surface 2 and the upper portion of inner ruler main body 3, the outer surface of sliding cylinder 7 is equipped with scale, and the right side of inner ruler main body 3 is fixed inner ruler handle 6.

[0029] The difference from example 2 is that:

[0030] The outer wall of the outer ruler handle 5 and the inner ruler handle 6 of the outer ruler main body 1 of the present embodiment is sleeved with an anti-skid rubber sleeve, which can facilitate the operation of the outer ruler main body 1 and the inner ruler main body 3 and avoid slipping.

[0031] The above is only the preferred embodiment of the utility model, and any skilled person in the art can modify the utility model by using the technical solutions described above or modify it into an equivalent technical solution. Therefore, any simple modification or equivalent transformation according to the technical solutions of the utility model is within the scope of protection required by the utility model.

Claims

1. A thread axis misalignment measuring gauge characterized by: The utility model relates to a kind of external caliper, including outer ruler body (1), external caliper measuring cone (2), inner ruler body (3), dial body (4), inner ruler handle (6), sliding cylinder (7), sliding cylinder fixing screw (8), dial fixing screw (9), the right side upper portion of the outer ruler body (1) is equipped with external caliper measuring cone (2), dial body (4) is installed in the middle upper portion of outer ruler body (1) by dial fixing screw (9), the middle lower portion of outer ruler body (1) is movably connected with the two sliding cylinders (7) left side of inner ruler body (3), and by sliding cylinder fixing screw (8) fastening position, by external caliper measuring cone (2) and the upper portion of inner ruler body (3) contact the end of outer thread (10) of oil jacket pipe, scale is equipped on the outer surface of the sliding cylinder (7), the right side of the inner ruler body (3) is fixed inner ruler handle (6).

2. The thread axis misalignment gauge of claim 1, wherein: The middle lower portion of the outer ruler body (1) is equipped with dial mounting hole (1.1), first sliding cylinder mounting hole (1.2) and second sliding cylinder mounting hole (1.3), first fixed screw hole (1.4) is equipped in the upper portion of dial mounting hole (1.2), second fixed screw hole (1.5) is equipped in the upper portion of first sliding cylinder mounting hole (1.2), third fixed screw hole (1.6) is equipped on second sliding cylinder mounting hole (1.3).

3. The thread axis misalignment gauge of claim 2 wherein the gauge is formed of a material having a hardness of at least 50 on the Rockwell C scale. The outer end of two sliding cylinders (7) is equipped with antiskid cover (11) respectively, the outer diameter of antiskid cover (11) is greater than the outer diameter of sliding cylinder (7).

4. The thread axis misalignment gauge of claim 3, wherein: The left lower portion of the outer ruler body (1) is fixed outer ruler handle (5), and located between first sliding cylinder mounting hole (1.2) and second sliding cylinder mounting hole (1.3).

5. A thread axis misalignment gauge according to claim 3 or 4, characterised in that: The upper portion of the outer ruler body (1) adopts different sizes of external caliper measuring cone (2).

6. The thread axis misalignment gauge of claim 5, wherein: The outer wall of the outer ruler handle (5) and inner ruler handle (6) of the outer ruler body (1) is sleeved with antiskid rubber sleeve.

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