Logging instrument
By using a stop-retardant ring and positioning structure in the well logging instrument, the anti-loose failure problem caused by the contact between the pinch screw and the outer peripheral surface of the rotating shaft is solved, ensuring a stable connection between the base and the rotating base, avoiding the risk of falling off.
Patent Information
- Application Number
- CN202420262465.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-02
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-02-02
AI Technical Summary
In existing logging instruments, the pinch screws are in contact with the outer peripheral surface of the rotating shaft to prevent loosening, but when the pinch screws fall back, the loosening failure occurs, resulting in the problem that the base and rotating base are prone to fall off.
The locking ring and positioning structure are adopted, and the screw head of the locking screw is contacted by the inner surface of the locking ring, which defines the position of the locking screw to prevent it from being released, and locking screws and retaining rings are provided on the base to enhance the Positioning of the stop-ret ring and preventing disengagement.
It effectively solves the problem of anti-loosening screw failure, ensures the fixity of the base and rotary base, and avoids the risk of the base and rotary base falling off.
Smart Images
Figure CN222276643U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of drilling measurement, in particular to a well logging instrument. Background Art
[0002] The logging instrument is used in the well drilling field. It can continuously scan the well wall and can also perform horizontal scanning at any level to provide technical data such as the wellbore vertical section, horizontal section, wellbore effective section, wellbore deviation distance, etc. In order to make more accurate and comprehensive measurements of the well wall, the end of the logging instrument often has a rotation function underground.
[0003] Generally, the logging instrument includes a rotating shaft driven by a motor, a rotating base is sleeved on the rotating shaft, a sensor for scanning and measuring the well wall is arranged inside the rotating base, and a cable is also inserted into the rotating shaft for signal transmission. In order to prevent the cables from being entangled due to the relative rotation of the rotating base and the rotating shaft during installation, a base is often arranged between the rotating shaft and the rotating base. Specifically, a threaded mounting hole is arranged on the base, and the base is threadedly assembled on the outer peripheral surface of the rotating shaft through the threaded mounting hole. Two step structures arranged at intervals are arranged on the outer peripheral surface of the base, and the two step structures form an outer step close to the rotating base and an inner step away from the rotating base. The rotating base is provided with a mounting hole that cooperates with the outer step structure stopper, and a convex ring for cooperating with the inner step structure for stopper is provided on one end of the threaded sleeve, and a threaded hole is provided on the other end. Under the action of the convex ring and the threaded hole, the threaded sleeve, the rotating base and the base are fixedly connected together. A limit screw is assembled on the threaded sleeve, and a limit groove that cooperates with the limit screw stopper is provided on the base. A tightening screw is also mounted on the base to abut against the rotating shaft to prevent loosening.
[0004] However, in the above technical solution, the radial dimension of the rotating shaft is limited, and a hollow through hole for the cable to pass through is provided at the axial position of the rotating shaft. In order to ensure the strength of the rotating shaft, no limit groove or limit hole or other structures are provided on the rotating shaft, but the end face of the tightening screw is abutted against the rotating shaft to prevent loosening. When the rotating base rotates together with the rotating shaft, if the tightening screw retreats, the tightening screw will fail to prevent loosening. Utility Model Content
[0005] The utility model aims to provide a logging instrument for solving the problem in the prior art that the tightening screw abuts against the outer peripheral surface of the rotating shaft to prevent loosening, which causes the tightening screw to fail to prevent loosening, thereby causing the base and the rotating base to fall off easily.
[0006] In order to achieve the above-mentioned purpose, the logging instrument in the utility model adopts the following technical solutions:
[0007] A logging instrument comprises a rotating shaft and a base threadedly assembled on the rotating shaft, a rotating base is directly or indirectly fixedly arranged on the base, a tightening screw is threadedly assembled on the base, the end of the tightening screw is tightened on the outer circumference of the rotating shaft, a stop ring is sleeved on the outer circumference of the base, the inner surface of the stop ring is in abutment contact with the screw head of the tightening screw, and a positioning structure for positioning the stop ring to prevent the stop ring from falling off the base is also arranged on the stop ring and / or the rotating shaft.
[0008] Furthermore, the positioning structure includes a locking screw threadedly assembled on the stop ring, the locking screw is used to tighten against the outer peripheral surface of the base or a stop groove is provided on the base, and the end of the locking screw extends into the stop groove.
[0009] Furthermore, the positioning structure comprises a retaining ring mounted on the rotating shaft, and a side surface of the retaining ring cooperates with an end surface stop of the retaining ring.
[0010] Furthermore, a stop surface arranged parallel to the axis of the base is provided on the base, and a stop plane in contact with the stop surface is provided on the inner side of the stop ring.
[0011] Furthermore, at least two stop surfaces are provided, and the plurality of stop surfaces are evenly arranged about the axis of the base.
[0012] Furthermore, the stop surface is provided with a threaded hole for installing a tightening screw.
[0013] Furthermore, the threaded hole is a countersunk hole, and the screw head of the tightening screw is flush with the stop surface.
[0014] Furthermore, the logging instrument also includes a threaded sleeve, one end of which is threadedly connected to the rotating base, and the end of the threaded sleeve away from the rotating base is also provided with a convex ring protruding from the inner wall of the threaded sleeve, and the base is provided with an outer step for abutting contact with the rotating base and an inner step for abutting contact with the convex ring.
[0015] Furthermore, a limit screw is threadedly assembled on the threaded sleeve, a limit slot is provided on the base, and an end of the limit screw extends into the limit slot.
[0016] Furthermore, an extension section is provided at one end of the base away from the rotating base, the stop ring is provided on the extension section, a stop step is provided on one side of the extension section close to the rotating base, and the end face of the threaded sleeve is flush with the step surface of the stop step.
[0017] The beneficial effects of the well logging instrument in the utility model are as follows: the utility model improves the existing well logging instrument, and by providing a base, it is convenient to fix the rotating base on the rotating shaft, so as to provide space for fixing the rotating base; by providing a tightening screw and tightening the tightening screw on the outer peripheral surface of the rotating shaft, it is convenient to connect the base and the rotating shaft together; in order to ensure that the anti-loosening of the tightening screw is always effective, a stop ring is sleeved on the outer peripheral surface of the base, and the tightening screw is limited by the inner surface of the stop ring abutting and contacting with the screw end of the tightening screw to prevent the tightening screw from falling out; in addition, in order to prevent the stop ring from falling out, a positioning structure is also provided to limit the position of the stop ring, thereby solving the problem in the prior art that the tightening screw abuts and contacts with the outer peripheral surface of the rotating shaft to prevent loosening, which makes the anti-loosening at the tightening screw fail, thereby causing the base and the rotating base to fall off easily. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 A cross-sectional view of an embodiment of the well logging instrument in the utility model;
[0019] Figure 2 for Figure 1 Cross-sectional view at AA in the middle.
[0020] In the figure: 1. threaded sleeve; 2. rotating base; 3. base; 4. limit screw; 5. stop ring; 6. tightening screw; 7. retaining ring; 8. rotating shaft; 9. locking screw; 10. sensor. DETAILED DESCRIPTION
[0021] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.
[0022] In the utility model, a backstop ring is sleeved on the outer peripheral surface of the base, and the backstop ring is used to cooperate with the screw end stop of the jacking screw to prevent the jacking screw from coming out.
[0023] In the embodiment of the logging instrument in the utility model:
[0024] like Figure 1As shown, the logging instrument in this embodiment includes a hollow rotating shaft 8 and a rotating base 2. The inside of the hollow rotating shaft 8 is used to set the cable. The rotating base 2 is fixedly provided with a sensor 10. In order to facilitate the fixed connection between the rotating base 2 and the rotating shaft 8, a base 3 is also provided between the rotating base 2 and the rotating shaft 8. A threaded section is provided at the end of the rotating shaft 8, and a threaded mounting hole for threaded assembly with the threaded section at the end of the rotating shaft 8 is provided on the base 3. A step structure is also provided on the outer peripheral surface of the base 3. Specifically, the base 3 is a structure with a thick middle and thin ends, that is, the base 3 has a large diameter section in the middle and a small diameter section at both ends, and a step structure is formed between the large diameter section and the small diameter section, that is, two step structures arranged at intervals are provided on the base 3, and the direction of the rotating shaft 8 toward the end is defined as the outside, and the direction toward the installation of the rotating shaft 8 is defined as the inside. The step structure located on the outside of the base 3 is recorded as the outside step, and the step structure located on the inside of the base 3 is recorded as the inside step. The small diameter section located on the outside is used to install the rotating base 2, and the small diameter section is recorded as the outside small diameter section.
[0025] like Figure 1 As shown, the rotating base 2 is provided with a mounting section for installation, and the mounting section is provided with a mounting hole. The mounting hole of the rotating base 2 is nested with the outer small diameter section on the base 3, and the outer step stopper at the end of the rotating base 2 cooperates. A threaded structure is also provided on the outer peripheral surface of the mounting section of the rotating base 2. In order to facilitate the fixed connection between the rotating base 2 and the base 3, the well logging instrument also includes a threaded sleeve 1, one end of the threaded sleeve 1 is a threaded hole section, and the other end is also provided with a convex ring protruding from the inner wall of the threaded sleeve 1. The convex ring of the threaded sleeve 1 cooperates with the inner step stopper where the inner small diameter section on the base 3 is located, and the threaded hole section of the threaded sleeve 1 is threadedly matched with the threaded section on the rotating base 2. The threaded sleeve 1 is fixedly connected to the threaded sleeve 1, the base 3 and the rotating base 2 through the threaded section and the convex ring on the threaded sleeve 1, that is, the rotating base 2 is indirectly provided on the base 3. Of course, in other embodiments, the rotating base 2 can also be directly sleeved on the base 3, and the rotating base 2 and the base 3 are welded.
[0026] like Figure 1 and Figure 2 As shown, in order to prevent the threaded sleeve 1, the rotating base 2 and the base 3 from loosening, a limit screw 4 is threadedly assembled on the threaded sleeve 1, and a limit groove is also provided on the large diameter section of the base 3. The limit groove is an annular groove provided on the outer peripheral surface of the base 3, and the limit screw 4 extends into the limit groove, and the limit screw 4 cooperates with the stopper of the groove side wall of the limit groove to prevent loosening. Of course, in other embodiments, the limit groove may no longer be provided, but the end of the limit screw 4 may be in contact with the outer peripheral surface of the base 3.
[0027] An extension section is also provided on the inner side of the inner small diameter section of the base 3. In order to prevent the base 3 and the rotating shaft 8 from loosening, a tightening screw 6 is also threadedly mounted on the extension section of the base 3. The end of the tightening screw 6 abuts against the outer peripheral surface of the rotating shaft 8, so that the tightening screw 6 is fixedly arranged with the base 3 and has a large friction force with the rotating shaft 8, which is convenient for preventing the base 3 and the rotating shaft 8 from loosening. In order to prevent the tightening screw 6 from coming out and causing the anti-loosening failure between the base 3 and the rotating shaft 8, a stop ring 5 is also sleeved on the extension section of the base 3. The stop ring 5 is arranged on the outside of the tightening screw 6 and is used to cooperate with the screw head stop of the tightening screw 6. Under the action of the stop ring 5, the screw of the tightening screw 6 will move toward the inner surface of the stop ring 5 during the loosening process. Since the screw head of the tightening screw 6 abuts against the inner surface of the stop ring 5, the tightening screw 6 will not retreat under the action of the inner surface of the stop ring 5, so that the anti-loosening is continuously effective. A step structure is formed between the extension section and the inner minor diameter section, and the step structure constitutes a stop step, and the end face of the threaded sleeve 1 is flush with the step surface of the stop step. Of course, in other embodiments, the end face of the threaded sleeve 1 can also protrude from the step surface of the stop step.
[0028] like Figure 2 As shown, in order to facilitate the setting of the stop ring 5, a stop surface arranged parallel to the axis of the base 3 is provided on the outer peripheral surface of the extension section of the base 3, and a stop plane that fits the stop surface is provided on the stop ring 5. The stop surface and the stop plane cooperate with each other, so that the stop ring 5 will not rotate on the base 3. Since the base 3 needs to rotate, the weight along the rotation axis needs to be as close as possible during the rotation process, so two stop surfaces are provided, and the two stop surfaces are evenly arranged about the axis of the base 3. Of course, in other embodiments, three stop surfaces can also be provided, and the three stop surfaces are evenly arranged about the rotation axis of the base 3. Alternatively, only one stop surface can be provided or no stop surface can be provided.
[0029] In order to facilitate the arrangement of the jacking screw 6, a threaded hole for accommodating the jacking screw 6 is provided on the stop surface, and the threaded hole is a countersunk hole, and the screw head of the jacking screw 6 is accommodated in the countersunk hole. Providing a countersunk hole on the stop surface facilitates the installation of the backstop ring 5, and the backstop ring 5 can be directly pushed into the outer peripheral surface of the base 3 from the end. Of course, in other embodiments, the base 3 may no longer be provided with a stop surface, and the jacking screw 6 is directly arranged on the cylindrical surface of the base 3. Alternatively, the jacking screw 6 is set as a top screw, and the countersunk hole may no longer be provided.
[0030] like Figure 1 and Figure 2As shown, the stop ring 5 also has a certain risk of falling. The stop ring 5 is also provided with a positioning structure for positioning the stop ring 5 so that the stop ring 5 is fixed relative to the rotating shaft 8. Specifically, the positioning structure includes a locking screw 9 threadedly assembled on the stop ring 5, and a stop groove is also provided on the extension section of the base 3. The locking screw extends into the stop groove and cooperates with the groove side wall of the stop groove. Of course, in other embodiments, the locking screw 9 can also be threadedly assembled on the stop ring 5, and the end of the locking screw is pressed against the outer peripheral surface of the extension section of the base 3. In order to further enhance the reliability of the stop ring 5, a retaining ring 7 is also installed on the rotating shaft 8, and the retaining ring 7 is assembled on the rotating shaft 8. The side of the retaining ring 7 cooperates with the end face stop of the stop ring 5, so that the stop ring 5 will not move in the axial direction. Of course, in other embodiments, the retaining ring 7 can also be no longer provided and only the locking screw is provided. Or, in other embodiments, the locking screw can also be no longer provided but only the retaining ring 7 is provided. Alternatively, in other embodiments, the locking screw and the retaining ring 7 may no longer be provided, and the inner surface of the retaining ring 5 and the outer peripheral surface of the extension section of the base 3 may be interference fit together, and the inner surface of the retaining ring 5 constitutes a positioning structure.
[0031] When the logging instrument needs to be assembled, firstly, the threaded sleeve 1, the retaining ring 7 and the backstop ring 5 are sleeved on the rotating shaft 8, then the base 3 is installed on the rotating shaft 8, then the rotating base 2 is sleeved on the outside of the base 3, and then the threaded sleeve 1 is screwed on the outer circumference of the base 3 and the rotating base 2. Then, the limit screw 4 and the tightening screw 6 are screwed into the threaded sleeve 1 and the base 3 respectively to prevent loosening. Then, the backstop ring 5 and the locking screw 9 are installed, and finally the retaining ring 7 is fixedly set on the rotating shaft 8 so that the side of the retaining ring 7 matches the end face stop of the backstop ring 5.
[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the description and drawings of the present invention shall be included in the protection scope of the present invention.
Claims
1. A logging instrument, comprising a rotating shaft and a base threadedly mounted on the rotating shaft, a rotating base being directly or indirectly fixedly mounted on the base, a tightening screw being threadedly mounted on the base, an end of the tightening screw being tightened against an outer peripheral surface of the rotating shaft, characterized in that: A stop ring is sleeved on the outer circumferential surface of the base, and the inner surface of the stop ring is in abutment with the screw head of the tightening screw. A positioning structure for positioning the stop ring to prevent the stop ring from falling out of the base is also provided on the stop ring and / or the rotating shaft.
2. The logging tool according to claim 1, characterized in that: The positioning structure includes a locking screw threadedly assembled on a stop ring, the locking screw is used to tighten against the outer peripheral surface of the base or a stop groove is provided on the base, and the end of the locking screw extends into the stop groove.
3. The logging tool according to claim 1 or 2, characterized in that: The positioning structure comprises a retaining ring installed on the rotating shaft, and the side surface of the retaining ring is matched with the end surface stop of the retaining ring.
4. The logging tool according to claim 1 or 2, characterized in that: The base is provided with a stop surface which is arranged parallel to the axis of the base, and the inner side of the stop ring is provided with a stop plane which is in contact with the stop surface.
5. The logging tool according to claim 4, characterized in that: At least two stop surfaces are provided, and the plurality of stop surfaces are evenly arranged about the axis of the base.
6. The logging tool according to claim 4, characterized in that: The stop surface is provided with a threaded hole for installing a tightening screw.
7. The logging tool according to claim 6, characterized in that: The threaded hole is a countersunk hole, and the screw head of the tightening screw is flush with the stop surface.
8. The well logging tool according to claim 1 or 2, characterized in that: The logging instrument also includes a threaded sleeve, one end of which is threadedly connected to a rotating base, and an end of the threaded sleeve away from the rotating base is also provided with a convex ring protruding from the inner wall of the threaded sleeve, and the base is provided with an outer step for abutting against the rotating base and an inner step for abutting against the convex ring.
9. The well logging tool according to claim 8, characterized in that: The threaded sleeve is threadedly assembled with a limit screw, the base is provided with a limit slot, and the end of the limit screw extends into the limit slot.
10. The well logging tool according to claim 8, characterized in that: An extension section is also provided at one end of the base away from the rotating base, the stop ring is provided on the extension section, a stop step is provided on one side of the extension section close to the rotating base, and the end face of the threaded sleeve is flush with the step surface of the stop step.