Wired in-hole television centralizing structure suitable for large-diameter drilling

Abstract

The utility model discloses a wired in-hole television centralizing structure suitable for a large-diameter drill hole, which comprises an in-hole television probe centralizing structure, a plurality of roller mounting notches, a plurality of roller mounting grooves, a plurality of roller mounting grooves and a plurality of roller mounting grooves are formed in the length direction of the in-hole television probe centralizing structure, and the roller mounting grooves and the roller mounting grooves penetrate through the in-hole television probe centralizing structure in the longitudinal direction and the transverse direction. A roller is mounted in each roller mounting notch, each roller is connected with the in-hole television centralizing structure through a rotating shaft, and the plane of the axis of the rotating shaft of each roller is parallel to the planes of the axes of the rotating shafts of the other rollers. The technical problems that in the prior art, a television probe in a hole is difficult to center in the hole, so that the searchlight intensity is not uniform, a gap for rock debris to pass through is small, and the passing performance of the probe cannot meet the requirement for crossing the rock debris in the hole are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of construction, and in particular relates to a wired in-hole television righting structure suitable for large-diameter drilling. Background Art

[0002] When performing in-hole television, it is necessary to form a gap between the in-hole television instrument and the hole wall to prevent the outer wall of the in-hole television from rubbing against the hole wall and avoiding wear of the outer wall of the in-hole television. At the same time, it improves the problem of the in-hole television being blocked by slag accumulated at the bottom of the hole wall and expands the imaging range; improves the uneven intensity of the searchlight in the hole wall and improves the phenomenon of "one bright and one dark" stripes appearing in the detection image.

[0003] To achieve the goal of creating a gap between the TV instrument in the hole and the hole wall, this can be achieved by adding a plastic sheet to the probe in vertical detection. However, in horizontal detection, the instrument needs to support the weight of its own push rod, and a special stabilizer needs to be installed to achieve the effect of creating a gap between the instrument and the hole wall.

[0004] Common designs for in-hole television centralizers include roller-type, elastic plate-type, and a combination of the two. Patent Publication No. CN220377241U, "Auxiliary Device for In-Hole Television Used in Anchor Cable Holes," is a roller-type centralizer. Patent Publication No. CN215369733U, "Centralizer for In-Hole Television Optical Imaging Probe," is an elastic plate-type centralizer. Patent Publication No. CN214118104U, "A Retractable Centralizer with a Tube Wheel," is a composite centralizer.

[0005] The defects or problems of the existing technology are:

[0006] In practice, the horizontal borehole diameter often exceeds the diameter of the TV probe inside the hole. The spacing provided by these various centralizers is often relatively limited, making it difficult to center the probe within the hole, resulting in uneven searchlight intensity. Furthermore, the clearance reserved by these centralizers for rock fragments to pass through is relatively small, which can affect the probe's ability to pass through rock fragments within the hole. Utility Model Content

[0007] The purpose of the utility model is to provide a wired in-hole TV straightening structure suitable for large-diameter drilling holes, so as to solve the problem that the diameter of the horizontal drilling hole is much larger than the diameter of the in-hole TV probe, and it is impossible to achieve the effect of centering the two probes in the hole, which will be affected by the uneven intensity of the searchlight and the small gap available for the passage of rock fragments, which will affect the passing performance of the probe when crossing the rock fragments in the hole.

[0008] The technical solution adopted by the utility model to solve its technical problems is:

[0009] A wired in-hole TV righting structure suitable for large-diameter drilling comprises: an in-hole TV probe righting structure, wherein the in-hole TV probe righting structure is provided with a plurality of roller mounting notches which penetrate the in-hole TV probe righting structure longitudinally and transversely along the length direction, wherein a roller is mounted in each of the roller mounting notches, and the roller is connected to the in-hole TV probe righting structure via a rotating shaft, and the axis of the rotating shaft of each roller is not coplanar with the parallel plane where the axis of the in-hole TV probe righting structure at the corresponding position is located.

[0010] The utility model provides a wired in-hole television righting structure suitable for large-diameter drilling, wherein the planes where two adjacent rollers are located are perpendicular to each other.

[0011] The utility model provides a wired in-hole television probe righting structure suitable for large-diameter drilling. Two adjacent rollers in the same direction have opposite offset directions relative to the in-hole television probe righting structure.

[0012] The utility model provides a wired in-hole television centering structure suitable for large-diameter drilling. The absolute values of the offsets of two adjacent rollers in the same direction relative to the in-hole television probe centering structure are equal.

[0013] The utility model provides a wired in-hole television centering structure suitable for large-diameter drilling. The absolute values of the offsets of two adjacent rollers relative to the in-hole television probe centering structure are equal.

[0014] The beneficial effects of the present invention are: a wired in-hole television straightening structure suitable for large-diameter drilling is proposed, which changes the rollers used for bearing force from a side-by-side arrangement to a distributed arrangement, and reserves sufficient space for installing large-diameter rollers, so that the straightener can be used for large-diameter drilling. Moreover, compared with traditional straighteners, its distributed roller arrangement only takes up space on the same cross-section, thereby reserving a gap for rock fragments to pass through. Moreover, by replacing rollers of different diameters, it can be adapted to drilling holes of various diameters. On top of this, the roller straightener retains the advantage of reducing friction compared to the elastic sheet straightener. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0016] Figure 1 It is a schematic diagram of the utility model;

[0017] Figure 2 It is a side perspective view of the utility model;

[0018] Figure 3 It is an end view of the present invention. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, rather than all the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] like Figure 1-3 As shown, a wired in-hole TV righting structure suitable for large-diameter drilling comprises: an in-hole TV probe righting structure 1, wherein the in-hole TV probe righting structure 1 is provided with a plurality of roller mounting notches 2 which penetrate the in-hole TV probe righting structure 1 longitudinally and transversely along the length direction, wherein a roller 3 is mounted in each of the roller mounting notches 2, and the roller 3 is connected to the in-hole TV probe righting structure 1 through a rotating shaft 4, and the axis of the rotating shaft 4 of each of the rollers 3 is not coplanar with the parallel plane where the axis of the in-hole TV probe righting structure 1 at the corresponding position is located.

[0021] It should be noted that, usually, the in-hole TV probe straightening structure 1 is a columnar structure, and the roller mounting notch 2 runs through the center of its side, and the length direction of the roller mounting notch 2 is codirectional with the length direction of the in-hole TV probe straightening structure 1; when the roller 3 is installed, the rotating shaft 4 passes through the center of the roller 3, but the rotating shaft 4 is not on the center of the in-hole TV probe straightening structure 1, that is, it will be biased up, down, left or right, and the direct feeling from the outside is that the height of the wheel rim of the roller 3 extending out from the two sides of the roller mounting notch 2 is different.

[0022] As a preferred embodiment, the planes of the two adjacent rollers 3 are perpendicular to each other.

[0023] If one roller 3 is arranged horizontally, the adjacent rollers on both sides thereof are arranged vertically.

[0024] As a preferred embodiment, the two adjacent rollers 3 in the same direction are offset in opposite directions relative to the in-hole TV probe straightening structure 1. To give a simple example, if the first of the two vertical rollers 3 is offset upward, the second vertical roller 3 is offset downward, and then the third vertical roller is offset upward again, and so on. Similarly, the rules for the horizontal rollers 3 are the same as those for the vertical ones.

[0025] As a preferred embodiment, the absolute values of the offsets of two adjacent rollers 3 in the same direction relative to the in-hole TV probe straightening structure 1 are equal. As mentioned above, the offsets of the two vertical rollers 3 are the same whether upward or downward, so that different pipe diameters can be adapted by adjusting the distance.

[0026] As a preferred embodiment, the absolute values of the offsets of the two adjacent rollers 3 relative to the in-hole TV probe straightening structure 1 are equal. As mentioned above, the two adjacent rollers 3 are one vertical and one horizontal, but both have an offset relative to the in-hole TV probe straightening structure 1. However, the direction of the offset may be different, but the size of the offset is the same.

[0027] Brief description of working principle:

[0028] In the specific application scenario of wired in-hole television (IBOV) in horizontal drilling, the borehole diameter is on the order of tens to hundreds of millimeters, while the push rod used to propel the IBOV probe straightening structure 1 is on the order of tens to hundreds of meters in length, a difference of more than a thousand times. This means that the push rod and IBOV probe straightening structure 1, together, will remain parallel to the borehole. Under the constraints of the push rod, the IBOV probe straightening structure 1 can still provide stable support for the IBOV probe straightening structure 1 even if the two force points supporting the IBOV probe straightening structure 1 are some distance apart. Because the center axis of roller 3 is located outside the axis of IBOV probe straightening structure 1, the diameter of the circumscribed circle formed by the larger offset portion of roller 3 is larger than the diameter of the smaller offset portion of roller 3. This ensures that each roller contacts the borehole wall at only one point, allowing the pulley to roll properly. Furthermore, by replacing rollers 3 with different diameters, the straightening device can be adapted for use in boreholes of various diameters.

[0029] When the in-hole TV probe straightening structure 1 is advanced in the borehole, on the same horizontal section, there is at most one roller 3 between the in-hole TV probe straightening structure 1 and the hole wall as a support. Compared with the traditional design, the continuous gap that can be used for rock fragments to pass through is left to the maximum extent, such as Figure 3 The debris is shown passing through space 5 .

[0030] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified or limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0032] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all such improvements and changes should fall within the scope of protection of the claims attached to this utility model.

Claims

1. A wired in-hole television righting structure suitable for large-diameter drilling, characterized in that: include: A TV probe in-hole straightening structure (1) is provided with a plurality of roller mounting notches (2) that penetrate the TV probe in-hole straightening structure (1) longitudinally and transversely along the length direction. A roller (3) is mounted in each of the roller mounting notches (2). The roller (3) is connected to the TV probe in-hole straightening structure (1) via a rotating shaft (4). The plane where the axis of the rotating shaft (4) of each roller (3) is located is parallel to and not coplanar with the plane where the axes of the rotating shafts (4) of the remaining rollers (3) are located.

2. The wired in-hole television righting structure suitable for large-diameter drilling according to claim 1, characterized in that: The planes on which two adjacent rollers (3) are located are perpendicular to each other.

3. The wired in-hole television righting structure suitable for large-diameter drilling according to claim 2, characterized in that: The two adjacent same-direction rollers (3) are offset in opposite directions relative to the in-hole television probe straightening structure (1).

4. The wired in-hole television righting structure suitable for large-diameter drilling according to claim 3, characterized in that: The absolute values of the offsets of two adjacent rollers (3) in the same direction relative to the in-hole TV probe straightening structure (1) are equal.

5. The wired in-hole television righting structure suitable for large-diameter drilling according to claim 4, characterized in that: The absolute values of the offsets of two adjacent rollers (3) relative to the in-hole TV probe straightening structure (1) are equal.

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