Centralizing device for geological and geophysical prospecting logging instrument

Abstract

The utility model discloses a righting device for a geological geophysical prospecting logging instrument, which comprises a cylindrical shell, the diameter of the cylindrical shell is sequentially reduced from top to bottom, the cylindrical shell comprises a first protection tube, a second protection tube and a third protection tube which are sequentially connected, and bending mechanisms are arranged among the first protection tube, the second protection tube and the third protection tube; the bending mechanism comprises arc-shaped springs, a steel wire rope and a tensioning assembly, the arc-shaped springs are arranged between the first protection pipe and the second protection pipe or between the second protection pipe and the third protection pipe, the tensioning assembly enables the arc-shaped springs to deform by pulling the steel wire rope, and then the radian joint of the cylindrical shell is driven to change. According to the centralizing device for the geophysical prospecting logging instrument, through the multi-stage bending mechanism, the centralizing device can be suitable for a bent and inclined well, and the practicability of the centralizing device for the geophysical prospecting logging instrument is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of geological detection, in particular to a righting device for a geological geophysical well logging instrument. Background Art

[0002] Chinese patent document CN215718533U discloses a geophysical logging instrument centering device, comprising a logging instrument protection tube within which the logging instrument is placed and fixed. The top of the logging instrument protection tube is covered by a cover plate secured to the logging instrument protection tube by screws. A co-located clamping assembly for securing the logging instrument is mounted on the side of the cover plate facing the inner cavity of the logging instrument protection tube. A threaded connecting pipe is welded and fixed to the bottom end of the logging instrument protection tube. This geophysical logging instrument centering device comprises a co-located clamping assembly, wherein three sets of clamping arms in the co-located clamping assembly can be driven to deflect at the same angle. This allows the three sets of clamping arms to clamp the logging instrument, preventing it from loosening during measurement, and allows the logging instrument to be fixed at the center of the device to maintain balance, preventing the logging instrument from tilting or shifting during measurement, which could affect the measurement results. However, in actual use, if the well path is tilted or curved, the detection device may not be able to pass smoothly. Utility Model Content

[0003] In view of the shortcomings existing in the above problems, the utility model provides a righting device for a geological and geophysical logging tool.

[0004] To achieve the above-mentioned object, the present invention provides a stabilizing device for a geophysical well logging instrument, comprising a cylindrical housing, wherein the diameter of the cylindrical housing decreases from top to bottom, the cylindrical housing comprising a first protective tube, a second protective tube, and a third protective tube connected in sequence, wherein a bending mechanism is provided between the first protective tube, the second protective tube, and the third protective tube;

[0005] In which, the bending mechanism includes an arc spring, a steel wire rope and a tensioning assembly. An arc spring is provided between the first protective tube and the second protective tube or between the second protective tube and the third protective tube. The tensioning assembly pulls the steel wire rope to deform the arc spring, thereby driving the curvature of the cylindrical shell to change.

[0006] Preferably, the tensioning assembly includes a motor, a winding drum and a transmission assembly, the motor drives the winding drum to move through the transmission assembly, and the steel wire rope is wound around the winding drum.

[0007] Preferably, the transmission assembly includes a driving wheel, a driven wheel and a transmission belt arranged between the driving wheel and the driven wheel, the driving wheel is connected to the motor output shaft, and the driven wheel is arranged on the winding drum.

[0008] Preferably, the tensioning assembly further includes a guide wheel, and the steel wire rope passes around the guide wheel and is connected to the winding drum.

[0009] Preferably, a geophysical logging instrument body is provided in the cylindrical housing.

[0010] Preferably, a protective sleeve is provided between the outer walls of the first protection tube and the second protection tube or between the outer walls of the second protection tube and the third protection tube.

[0011] Preferably, the first protection tube, the second protection tube and the third protection tube are all provided with elastic balls.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] The utility model uses a multi-stage bending mechanism to enable the device to be suitable for a geophysical well logging instrument straightening device for a curved and inclined well, thereby improving the practicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is the overall structural diagram of the utility model;

[0015] Figure 2 It is an overall cross-sectional view of the utility model;

[0016] Figure 3 yes Figure 2 Enlarged view of point A in the middle. DETAILED DESCRIPTION

[0017] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, 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, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0018] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0020] The following is combined with Figure 1-3 The utility model is further described in detail:

[0021] Reference Figure 1 The utility model provides a stabilizing device for a geophysical well logging instrument, comprising a cylindrical housing, the diameter of which decreases from top to bottom, the cylindrical housing comprising a first protective tube 1, a second protective tube 2, and a third protective tube 3 connected in sequence, a bending mechanism 6 being provided between the first protective tube 1, the second protective tube 2, and the third protective tube 3;

[0022] Specifically, the cylindrical shell is divided into a multi-level structure, which includes a first protective tube 1, a second protective tube 2, a third protective tube 3, and a protective cover 4 for preventing stone fragments arranged between the first protective tube 1, the second protective tube 2, and the third protective tube 3. The overall curvature of the cylindrical shell is adjusted by arranging multiple bending mechanisms 6 between each level.

[0023] Reference Figure 2 and Figure 3 The bending mechanism 6 includes an arc spring 67, a steel wire rope 65 and a tensioning assembly. An arc spring 67 is provided between the first protective tube 1 and the second protective tube 2 or between the second protective tube 2 and the third protective tube 3. The tensioning assembly deforms the arc spring 67 by pulling the steel wire rope 65, thereby driving the curvature of the cylindrical shell to change.

[0024] Specifically, the tensioning assembly includes a motor 61 , a bobbin 64 and a transmission assembly. The motor 61 drives the bobbin 64 to move through the transmission assembly, and the wire rope 65 is wound around the bobbin 64 .

[0025] The transmission assembly further includes a driving pulley 62, a driven pulley, and a transmission belt 63 disposed between the driving and driven pulleys. The driving pulley 62 is connected to the output shaft of the motor 61, and the driven pulley is mounted on a winding drum 64. The tensioning assembly also includes a guide pulley 66, around which a wire rope 65 passes and is connected to the winding drum 64. When the motor 61 is in operation, it can loosen or tighten the winding drum 64, thereby releasing or retracting the wire rope 65, causing the arc spring 67 to relax or tighten, thereby achieving the desired bending effect.

[0026] In this embodiment, a geophysical logging instrument body 7 is disposed in the cylindrical housing. Elastic balls 5 are disposed on the first protection tube 1, the second protection tube 2, and the third protection tube 3.

[0027] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A geophysical well logging instrument centralizing device, characterized in that: The cylindrical shell includes a cylindrical shell, the diameter of which decreases from top to bottom, the cylindrical shell including a first protective tube, a second protective tube, and a third protective tube connected in sequence, wherein a bending mechanism is provided between the first protective tube, the second protective tube, and the third protective tube; In which, the bending mechanism includes an arc spring, a steel wire rope and a tensioning assembly. An arc spring is provided between the first protective tube and the second protective tube or between the second protective tube and the third protective tube. The tensioning assembly pulls the steel wire rope to deform the arc spring, thereby driving the curvature of the cylindrical shell to change.

2. The geophysical logging tool centralizing device according to claim 1, wherein: The tensioning assembly includes a motor, a winding drum and a transmission assembly. The motor drives the winding drum to move through the transmission assembly, and the steel wire rope is wound on the winding drum.

3. The geophysical logging tool centralizing device according to claim 2, wherein: The transmission assembly includes a driving wheel, a driven wheel and a transmission belt arranged between the driving wheel and the driven wheel. The driving wheel is connected to the motor output shaft, and the driven wheel is arranged on the winding drum.

4. The geophysical logging tool centralizing device according to claim 3, characterized in that: The tensioning assembly further includes a guide wheel, and the steel wire rope passes around the guide wheel and is connected to the winding drum.

5. The geophysical logging tool centralizing device according to claim 4, characterized in that: The cylindrical shell is provided with a geophysical logging instrument body.

6. The geophysical logging tool centralizing device according to claim 5, characterized in that: A protective sleeve is provided between the outer walls of the first protection tube and the second protection tube or between the outer walls of the second protection tube and the third protection tube.

7. The geophysical logging tool centralizing device according to claim 6, characterized in that: Elastic balls are provided on the first protection tube, the second protection tube and the third protection tube.

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