Cement bond logging instrument with eccentricity correction function

Abstract

The utility model relates to the technical field of cement bond logging instruments, and discloses a cement bond logging instrument with an eccentricity correction function, which comprises a cement bond logging instrument body. The cement bond logging instrument body is composed of an electronic circuit module, a sound wave generator, a sound insulator, a sound wave logging receiver, a sound amplitude logging receiver and a sound wave variable density logging receiver. The threaded block is spirally rotated, the threaded block drives the adjusting sleeve to move downwards on the outer wall of the L-shaped guide rod through cooperation of the limiting slide and the guide groove, and the adjusting sleeve drives the four arc-shaped positioning plates to expand outwards through the multiple connecting rods and the multiple multi-section guide telescopic rods. Four arc-shaped positioning plates are arranged in the inner cavity of the cased well, and rolling balls on the outer walls of the four arc-shaped positioning plates abut against the inner wall of the cased well, so that the cement bond logging instrument is limited, it is guaranteed that the cement bond logging instrument is located in the middle of the inner cavity of the cased well, the conditions of inclination and eccentricity of the cement bond logging instrument are avoided, and the accuracy of measured data of the cement bond logging instrument is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cement bond logging instruments, and more particularly to a cement bond logging instrument with an eccentricity correction function. Background Art

[0002] The "Cement Bond Logging Tool" is an acoustic logging instrument used to monitor the quality of casing cement bonds. It assesses cement bond quality by transmitting and receiving acoustic signals and is typically used in cased wells. Cement Bond Logging Tools are widely used in oil exploration and development. They provide detailed information on casing cement bond quality, helping engineers assess cementing quality and promptly identify and address cementing issues. This logging method effectively identifies wellbore channels, has a wide detection range, is less affected by thin mud rings, and is applicable to various well conditions.

[0003] At present, when using cement bond logging tools, they usually need to be lowered into the casing well for testing. During the lowering and testing process, since the cement bond logging tool is usually similar to a long rod, it is easy to tilt and eccentricity, which leads to inaccurate measurement data and affects the evaluation of cementing quality. This needs to be improved. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the utility model provides a cement bond logging tool with an eccentricity correction function to solve the problems existing in the above-mentioned background technology.

[0005] The utility model provides the following technical solution: a cement bond logging instrument with an eccentricity correction function, comprising a cement bond logging instrument body, wherein the cement bond logging instrument body is composed of an electronic circuit module, an acoustic wave generator, a sound insulator, an acoustic wave logging receiver, an acoustic amplitude logging receiver and an acoustic variable density logging receiver, wherein the electronic circuit module, the acoustic wave generator, the sound insulator, the acoustic wave logging receiver, the acoustic amplitude logging receiver and the acoustic variable density logging receiver are fixedly connected, a correction mechanism is installed in the middle of the outer wall of the cement bond logging instrument body, the correction mechanism comprises a connecting tube, the interior of the connecting tube is fixedly sleeved in the middle of the outer wall of the cement bond logging instrument body, the outer wall of the connecting tube is movably sleeved with an adjustment sleeve, and arc-shaped positioning plates are provided around the outside of the adjustment sleeve, and the number of the arc-shaped positioning plates is four, and connecting rods are hinged above and below one side of the four arc-shaped positioning plates, and one end of the connecting rod is hinged to the outer wall of the adjustment sleeve.

[0006] Furthermore, an external thread is provided on the upper portion of the outer wall of the connecting tube, and a threaded block is threadedly sleeved on the upper portion of the outer wall of the connecting tube, and the threaded block is located above the adjusting sleeve.

[0007] Furthermore, a plurality of limiting sliders are fixedly connected to the bottom of the threaded block, an annular limiting slot is provided on the top of the adjustment sleeve, and the lower parts of the outer walls of the plurality of limiting sliders are slidably connected to the inside of the annular limiting slot.

[0008] Furthermore, L-shaped guide rods are fixedly connected to the lower parts of both sides of the connecting tube, and the top ends of the two L-shaped guide rods are slidably sleeved on both sides of the bottom of the adjustment sleeve.

[0009] Furthermore, multi-section guide telescopic rods are fixedly installed around the lower part of the outer wall of the connecting tube. The number of the multi-section guide telescopic rods is four, and the telescopic ends of the four multi-section guide telescopic rods are fixedly connected to the lower part of one side of the four arc-shaped positioning plates.

[0010] Furthermore, a plurality of rolling balls are rotatably embedded on the other side of the four arc-shaped positioning plates.

[0011] The technical effects and advantages of this utility model are:

[0012] 1. This utility model utilizes a connecting tube, a threaded block, a limiting slider, an adjustment sleeve, an annular limiting slot, a connecting rod, an arc-shaped positioning plate, a rolling ball, an L-shaped guide rod, and a multi-section guide telescopic rod. By helically rotating the threaded block, the threaded block moves along the outer wall of the connecting tube. The threaded block, through the cooperation of the limiting slider and the guide slot, drives the adjustment sleeve downward along the outer wall of the L-shaped guide rod. The adjustment sleeve, through multiple connecting rods and multiple multi-section guide telescopic rods, drives the four arc-shaped positioning plates outward, causing the rolling balls on the outer walls of the four arc-shaped positioning plates to abut against the inner wall of the cased well. This limits the position of the cement bond logging instrument, ensuring that the cement bond logging instrument is located in the center of the cased well cavity, preventing tilt and eccentricity of the cement bond logging instrument and improving the accuracy of the cement bond logging instrument's measurement data.

[0013] 2. This utility model utilizes multiple rolling balls to prevent friction between the outer wall of the arc-shaped positioning plate and the inner wall of the casing well. The two L-shaped guide rods facilitate vertical guidance of the adjustment sleeve, while the multi-section guide telescopic rods facilitate horizontal guidance of the arc-shaped positioning plate, preventing the arc-shaped positioning plate from tilting when expanding outward. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0015] Figure 2 This is a schematic structural diagram of the correction mechanism of the present utility model.

[0016] Figure 3 It is a schematic cross-sectional view of the correction mechanism structure of the present utility model.

[0017] Figure 4 It is a top view schematic diagram of the limit slider, adjustment sleeve, annular limit slide groove, connecting rod, arc-shaped positioning plate and rolling ball structure of the utility model.

[0018] Figure 5 It is a schematic cross-sectional view of the local structure of the annular limiting sliding groove of the present utility model.

[0019] The accompanying drawings are marked as follows: 1. Cement bond logging instrument body; 2. Correction mechanism; 21. Connecting cylinder; 22. Threaded block; 23. Limiting slider; 24. Adjusting sleeve; 25. Annular limiting slide; 26. Connecting rod; 27. Arc-shaped positioning plate; 28. Rolling ball; 29. ​​L-shaped guide rod; 291. Multi-section guide telescopic rod; 3. Electronic circuit module; 4. Sound wave generator; 5. Sound insulator; 6. Sound wave logging receiver; 7. Amplitude logging receiver; 8. Sound wave variable density logging receiver. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are merely examples. The cement bond logging instrument with eccentricity correction function involved in the present invention is not limited to the various structures recorded in the following embodiments. All other implementation methods obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0021] Example 1:

[0022] like Figure 1-5As shown, a cement bond logging instrument with an eccentricity correction function includes a cement bond logging instrument body 1, which is composed of an electronic circuit module 3, an acoustic wave generator 4, a sound insulator 5, an acoustic wave logging receiver 6, an acoustic amplitude logging receiver 7, and an acoustic variable density logging receiver 8. The electronic circuit module 3, the acoustic wave generator 4, the sound insulator 5, the acoustic wave logging receiver 6, the acoustic amplitude logging receiver 7, and the acoustic variable density logging receiver 8 are fixedly connected. A correction mechanism 2 is installed in the middle of the outer wall of the cement bond logging instrument body 1. The correction mechanism 2 includes a connecting tube 21. The interior of the connecting tube 21 is fixedly sleeved in the middle of the outer wall of the cement bond logging instrument body 1. The outer wall of the connecting tube 21 is movably sleeved with an adjustment sleeve 24. The upper part of the outer wall of the connecting tube 21 is provided with an external thread. The upper threaded sleeve of the outer wall of the cylinder 21 is connected with a threaded block 22, and the threaded block 22 is located above the adjusting sleeve 24. The bottom of the threaded block 22 is fixedly connected with multiple limit sliders 23. The top of the adjusting sleeve 24 is provided with an annular limit sliding groove 25. The lower parts of the outer walls of the multiple limit sliders 23 are slidably connected to the inside of the annular limit sliding groove 25. Since the upper part of the outer wall of the connecting cylinder 21 is provided with an external thread, the threaded block 22 can be spirally moved on the outer wall of the connecting cylinder 21 by spirally rotating the threaded block 22. The arrangement of the multiple limit sliders 23 and the annular limit sliding groove 25 facilitates the connection between the threaded block 22 and the adjusting sleeve 24. When the threaded block 22 is spirally moved, the multiple limit sliders 23 can be driven to slide inside the annular limit sliding groove 25, and the adjusting sleeve 24 can be driven to move on the adjusting sleeve 24.

[0023] like Figure 1-5 As shown, L-shaped guide rods 29 are fixedly connected to the lower sides of the connecting cylinder 21. The top ends of the two L-shaped guide rods 29 are slidably sleeved on both sides of the bottom of the adjustment sleeve 24. When the connecting cylinder 21 moves, the two L-shaped guide rods 29 are set to facilitate vertical guidance of the connecting cylinder 21, preventing the adjustment sleeve 24 from rotating with the rotation of the threaded block 22.

[0024] like Figure 1-5As shown, arc-shaped positioning plates 27 are provided around the outside of the adjusting sleeve 24, and there are four arc-shaped positioning plates 27. Connecting rods 26 are hinged above and below one side of the four arc-shaped positioning plates 27. One end of the connecting rod 26 is hinged to the outer wall of the adjusting sleeve 24, and a multi-section guide telescopic rod 291 is fixedly installed around the bottom of the outer wall of the connecting tube 21. There are four multi-section guide telescopic rods 291, and the telescopic ends of the four multi-section guide telescopic rods 291 are fixedly connected to the bottom of one side of the four arc-shaped positioning plates 27. When the adjusting sleeve 24 moves vertically, it can drive one end of the multiple connecting rods 26 to move downward, and the other ends of the multiple connecting rods 26 push the four arc-shaped positioning plates 27 outward to expand. When the arc-shaped positioning plates 27 move, the telescopic ends of the multi-section guide telescopic rods 291 can be driven to move. The multi-section guide telescopic rods 291 can be used to guide the arc-shaped positioning plates 27 horizontally.

[0025] like Figure 1-5 As shown, a plurality of rolling balls 28 are rotatably embedded on the other side of the four arc-shaped positioning plates 27. The arrangement of the plurality of rolling balls 28 can avoid friction between the outer wall of the arc-shaped positioning plate 27 and the inner wall of the casing well.

[0026] In summary, if Figure 1-5 As shown, the cement bond logging instrument with eccentricity correction function is used. First, the connecting tube 21 on the outer wall of the cement bond logging instrument body 1 is placed in the inner cavity of the casing well. The staff then spirally rotates the threaded block 22 so that the threaded block 22 moves downward in a spiral on the outer wall of the connecting tube 21. The threaded block 22 drives multiple limiting sliders 23 to slide inside the annular limiting groove 25. At the same time, the threaded block 22 drives the adjusting sleeve 24 to slide vertically downward on the outer wall of the connecting tube 21 and the top of the L-shaped guide rod 29 through multiple limiting sliders 23. The outer wall of the adjusting sleeve 24 synchronously drives one end of the multiple connecting rods 26 to move, and the other end of the multiple connecting rods 26 The end pushes the four arc-shaped positioning plates 27 outward to expand, and the arc-shaped positioning plates 27 simultaneously drive the telescopic ends of the multi-section guide telescopic rods 291 to move horizontally, so that the outer walls of the four arc-shaped positioning plates 27 are moved to the inner wall of the casing well, and the outer wall of the rolling ball 28 is in contact with the inner wall of the casing well. At this time, the cement bond logging instrument can be limited to ensure that the cement bond logging instrument is located in the middle of the inner cavity of the casing well. At this time, the cement bond logging instrument can be vertically lowered into the inner cavity of the casing well, and sound waves are generated by the sound wave generator 4. The sound wave logging receiver 6, the sound amplitude logging receiver 7 and the sound wave variable density logging receiver 8 are used to receive the reflected sound waves for detection.

[0027] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense, and may refer to mechanical or electrical connections, internal communication between two components, or direct connection. "Up," "down," "left," and "right" are only used to indicate relative positional relationships. When the absolute positions of the objects being described change, the relative positional relationships may also change.

[0028] Secondly: The drawings of the embodiments disclosed in this utility model only involve structures related to the embodiments disclosed in this utility model. Other structures can refer to common designs. In the absence of conflicts, the same embodiment and different embodiments of the utility model can be combined with each other.

[0029] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A cement bond logging tool with an eccentricity correction function, comprising a cement bond logging tool body (1), characterized in that: The cement bond logging instrument body (1) is composed of an electronic circuit module (3), an acoustic wave generator (4), a sound insulator (5), an acoustic wave logging receiver (6), an acoustic amplitude logging receiver (7), and an acoustic wave variable density logging receiver (8). The electronic circuit module (3), the acoustic wave generator (4), the sound insulator (5), the acoustic wave logging receiver (6), the acoustic amplitude logging receiver (7), and the acoustic wave variable density logging receiver (8) are fixedly connected. A correction mechanism (2) is installed in the middle of the outer wall of the cement bond logging instrument body (1). The correction mechanism (2) includes a connecting tube (21), the interior of the connecting tube (21) is fixedly sleeved on the middle part of the outer wall of the cement bonded logging instrument body (1), the outer wall of the connecting tube (21) is movably sleeved with an adjustment sleeve (24), and the outer periphery of the adjustment sleeve (24) is provided with arc-shaped positioning plates (27), the number of the arc-shaped positioning plates (27) is four, and the upper and lower sides of the four arc-shaped positioning plates (27) are hinged with connecting rods (26), and one end of the connecting rod (26) is hinged to the outer wall of the adjustment sleeve (24).

2. The cement bond logging tool with eccentricity correction function according to claim 1, characterized in that: An external thread is provided above the outer wall of the connecting tube (21), and a threaded block (22) is threadedly sleeved above the outer wall of the connecting tube (21), and the threaded block (22) is located above the adjustment sleeve (24).

3. The cement bond logging tool with eccentricity correction function according to claim 2, characterized in that: The bottom of the threaded block (22) is fixedly connected to a plurality of limiting slide blocks (23), the top of the adjustment sleeve (24) is provided with an annular limiting slide groove (25), and the lower parts of the outer walls of the plurality of limiting slide blocks (23) are slidably connected to the inside of the annular limiting slide groove (25).

4. The cement bond logging tool with eccentricity correction function according to claim 1, characterized in that: L-shaped guide rods (29) are fixedly connected to the lower sides of both sides of the connecting tube (21), and the top ends of the two L-shaped guide rods (29) are slidably sleeved on both sides of the bottom of the adjustment sleeve (24).

5. The cement bond logging tool with eccentricity correction function according to claim 1, characterized in that: Multi-section guide telescopic rods (291) are fixedly installed around the lower portion of the outer wall of the connecting tube (21). The number of the multi-section guide telescopic rods (291) is four, and the telescopic ends of the four multi-section guide telescopic rods (291) are fixedly connected to the lower portion of one side of the four arc-shaped positioning plates (27).

6. The cement bond logging tool with eccentricity correction function according to claim 1, characterized in that: The other side of the four arc-shaped positioning plates (27) is rotatably inlaid with a plurality of rolling balls (28).

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