Headstall release structure and logging headstall

Abstract

The utility model relates to a headstall release structure and a logging headstall, and relates to the technical field of logging devices. The headstall releasing structure comprises a shell, a releasing rod, a heating piece, a hot melting piece and an elastic piece. A sliding cavity is formed in the shell, and an opening of the sliding cavity is located at one end of the shell; the release rod is movably arranged in the sliding cavity, and one end of the release rod extends out of the opening of the sliding cavity; the heating piece is arranged at the end, away from the opening, of the sliding cavity, and the heating piece and the release rod are coaxially arranged; the heating piece is sleeved with the hot melting piece, and the two ends of the hot melting piece abut against the release rod and the shell correspondingly; the release rod is sleeved with the elastic piece, and the two ends of the elastic piece abut against the shell and the release rod respectively. According to the technical scheme, the problem that the releasing process of an existing headstall releasing structure is not fast enough and not stable enough can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of well logging equipment, in particular to a bridle releasing structure and a well logging bridle. Background Art

[0002] The logging bridle is a quick connector tool used to connect logging cables and logging instruments. It can separate the downhole cable from the instrument string and is widely used in oil field production.

[0003] Existing bridle release structures usually adopt the principle of breaking at a mechanical weak point. When the logging instrument gets stuck underground, a certain strength of pulling force is applied to break the weak point and achieve release. However, it often takes a certain amount of time to complete the breaking, and the energy released at the moment of breaking is large, making the release process not fast enough and not smooth enough. Utility Model Content

[0004] The embodiments of the present application provide a bridle release structure and a well logging bridle, which can solve the problem that the release process of the existing bridle release structure is not fast enough and not smooth enough.

[0005] In a first aspect, an embodiment of the present application provides a bridle release structure, comprising:

[0006] a housing, wherein a sliding cavity is provided in the housing, and an opening of the sliding cavity is located at one end of the housing;

[0007] a release rod movably disposed in the sliding cavity, with one end of the release rod extending out of the opening of the sliding cavity;

[0008] a heating element, disposed at an end of the sliding cavity away from the opening, and the heating element is coaxially disposed with the release rod;

[0009] a hot melt component, sleeved on the heating component, with two ends of the hot melt component respectively abutting against the release rod and the housing; and

[0010] The elastic member is sleeved on the release rod, and two ends of the elastic member are respectively in contact with the housing and the release rod.

[0011] In one embodiment, there is an annular distance between the hot melt component and the inner wall of the sliding cavity.

[0012] In one embodiment, the hot melt comprises:

[0013] a first hot-melt section, wherein an inner wall of the first hot-melt section is in contact with the heating element, and an outer diameter of the first hot-melt section gradually decreases along an axial direction of the heating element;

[0014] a second hot melt section, coaxially arranged with the first hot melt section, wherein the inner wall of the second hot melt section is in contact with the heating element, and the outer diameter of the second hot melt section gradually increases along the axial direction of the heating element; and

[0015] a third hot melt section, whose two ends are respectively connected to the first hot melt section and the second hot melt section, an inner wall of the third hot melt section is in contact with the heating element, and the third hot melt section is cylindrical;

[0016] Among them, the outer diameter of the end of the first hot melt section away from the third hot melt section is larger than the outer diameter of the end of the first hot melt section close to the third hot melt section; the outer diameter of the end of the second hot melt section away from the third hot melt section is larger than the outer diameter of the end of the second hot melt section close to the third hot melt section.

[0017] In one embodiment, one end of the first hot melt section away from the third hot melt section abuts against the inner wall of the sliding cavity, and one end of the second hot melt section away from the third hot melt section abuts against the inner wall of the sliding cavity.

[0018] In one embodiment, the release lever comprises:

[0019] A first releasing section is movably disposed in the sliding cavity; and

[0020] a second release section, one end of which is connected to the first release section and the other end of which extends out of the opening;

[0021] Wherein, the diameter of the second release section is smaller than the diameter of the first release section, so as to form a release step surface abutting against the elastic member.

[0022] In one embodiment, a guide hole is provided inside the first release section, and the heating element matches the shape of the guide hole.

[0023] In one embodiment, the housing includes a first cavity segment, a second cavity segment, a third cavity segment, and a fourth cavity segment that are sequentially arranged and communicated with each other along the axial direction of the release rod.

[0024] In one embodiment, the opening is located on a side of the first cavity segment away from the second cavity segment, and the inner diameter of the opening is smaller than the inner diameter of the first cavity segment, so as to form a first step surface abutting against the elastic member;

[0025] The diameter of the second cavity section is greater than the diameter of the third cavity section to form a second step surface abutting against the hot melt component.

[0026] In one embodiment, one end of the heating element is threadedly connected to the fourth cavity segment.

[0027] In a second aspect, an embodiment of the present application provides a well logging bridle, comprising the bridle release structure as described above.

[0028] Compared with the prior art, the advantages of the embodiments of the present application are that a hot-melt component is used to replace the traditional mechanical weak point connection to lock the release rod, and the release action is achieved by heating the hot-melt component by a heating element to unlock it, replacing the traditional mechanical weak point pull-off unlocking. The hot-melt component is mounted on the heating element to form an internal heating structure with a short heating path, uniform heating, and a fast melting speed, making the entire release process fast and stable, solving the problem that the existing release process is not fast enough and not smooth enough. When the release rod is locked, the hot-melt component acts as a limiter in the axial direction of the release rod, constraining the axial movement of the release rod, and the elastic component is in compression deformation and stores elastic potential energy; when the release rod is released, the hot-melt component heats the hot-melt component, and the hot-melt component melts, thereby ending the axial constraint on the release rod. Under the action of the elastic component, the release rod slides along the sliding cavity to achieve the release action. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will be described in more detail below based on embodiments with reference to the accompanying drawings.

[0030] Figure 1 This is a structural diagram of a bridle release structure provided by an embodiment of the present utility model;

[0031] Figure 2 yes Figure 1 A schematic structural diagram of a hot melt component provided in the embodiment.

[0032] Reference numerals:

[0033] 10. Housing; 110. Sliding cavity; 1101. Opening; 1102. First cavity section; 1103. Second cavity section; 1104. Third cavity section; 1105. Fourth cavity section; 1106. First step surface; 1107. Second step surface

[0034] 20, release lever; 210, first release section; 220, second release section; 2201, release step surface;

[0035] 30. Heating element;

[0036] 40, hot melt component; 410, first hot melt section; 420, second hot melt section; 430, third hot melt section;

[0037] 50. Elastic parts. DETAILED DESCRIPTION

[0038] The present invention will be further described below with reference to the accompanying drawings.

[0039] Existing bridle release structures usually adopt the principle of breaking at a mechanical weak point. When the logging instrument gets stuck underground, a certain strength of pulling force is applied to break the weak point and achieve release. However, it often takes a certain amount of time to complete the breaking, and the energy released at the moment of breaking is large, making the release process not fast enough and not smooth enough.

[0040] Example 1

[0041] like Figure 1 As shown, in order to solve the above technical problems, an embodiment of the present application provides a bridle release structure, including a shell 10, a release rod 20, a heating element 30, a hot melt element 40 and an elastic element 50; a sliding cavity 110 is provided in the shell 10, and an opening 1101 of the sliding cavity 110 is located at one end of the shell 10; the release rod 20 is movably provided in the sliding cavity 110, and one end of the release rod 20 extends out of the opening 1101 of the sliding cavity 110; the heating element 30 is provided at one end of the sliding cavity 110 away from the opening 1101, and the heating element 30 and the release rod 20 are coaxially arranged; the hot melt element 40 is sleeved on the heating element 30, and the two ends of the hot melt element 40 are respectively abutted against the release rod 20 and the shell 10; the elastic element 50 is sleeved on the release rod 20, and the two ends of the elastic element 50 are respectively abutted against the shell 10 and the release rod 20.

[0042] As can be seen from the above, the release rod 20 is locked and restricted by a hot melt component 40 instead of a traditional mechanical weak point connection, and the release action is achieved by heating the hot melt component 40 with the heating component 30, replacing the traditional mechanical weak point pull-off unlocking. The hot melt component 40 is mounted on the heating component 30 to form an internal heating structure with a short heating path, uniform heating, and a fast melting speed, making the entire release process fast and stable, solving the problem that the existing release process is not fast enough and not smooth enough. When the release rod 20 is locked and restricted, the hot melt component 40 acts as a limiter in the axial direction of the release rod 20, constraining the axial movement of the release rod 20, and the elastic component 50 is in compression deformation and stores elastic potential energy; when the release rod 20 is released, the hot melt component 40 heats the hot melt component 40, and the hot melt component 40 melts, thereby ending the axial constraint on the release rod 20. Under the action of the elastic component 50, the release rod 20 slides along the sliding cavity 110 to achieve the release action.

[0043] Compared to the prior art's mechanical weak-point breaking principle, where the release process requires almost all of the time needed to complete the break, the moment of breakage is very short, and the energy released at that moment is large, resulting in a slow and unstable release process. This application, on the other hand, utilizes an internally heated hot-melt release mechanism, which shortens the release time. Once the hot-melt member 40 is partially melted, the release rod 20 moves axially, initiating the release action. This ensures a fast and stable release process.

[0044] It should be noted that the elastic member 50 includes but is not limited to a spring; the hot melt member 40 includes but is not limited to fusible metal.

[0045] It should also be noted that the hot melt component 40 is provided with a hot melt hole for the heating component 30 to pass through, and the hot melt hole matches the shape of the heating component 30 so that the hot melt component 40 can slide along the heating component 30.

[0046] Example 2

[0047] like Figure 1 As shown, the bridle release structure includes a shell 10, a release rod 20, a heating element 30, a hot melt element 40 and an elastic element 50; a sliding cavity 110 is provided in the shell 10, and an opening 1101 of the sliding cavity 110 is located at one end of the shell 10; the release rod 20 is movably provided in the sliding cavity 110, and one end of the release rod 20 extends out of the opening 1101 of the sliding cavity 110; the heating element 30 is provided at the end of the sliding cavity 110 away from the opening 1101, and the heating element 30 and the release rod 20 are coaxially provided; the hot melt element 40 is sleeved on the heating element 30, and the two ends of the hot melt element 40 are respectively abutted against the release rod 20 and the shell 10; the elastic element 50 is sleeved on the release rod 20, and the two ends of the elastic element 50 are respectively abutted against the shell 10 and the release rod 20.

[0048] The release rod 20 is locked and restricted by a heat-melting hot melt component 40 instead of a conventional mechanical weak point connection, and the release action is achieved by heating the hot melt component 40 with the heating component 30 to unlock it, replacing the conventional mechanical weak point pull-off unlocking. The hot melt component 40 is sleeved on the heating component 30 to form an internal heating structure with a short heating path, uniform heating, and a fast melting speed, making the entire release process fast and stable, solving the problem that the existing release process is not fast enough and not smooth enough. When the release rod 20 is locked and restricted, the hot melt component 40 acts as a limiter in the axial direction of the release rod 20, constraining the axial movement of the release rod 20, and the elastic component 50 is in a state of compression deformation and storing elastic potential energy; when the release rod 20 is released, the hot melt component 40 heats the hot melt component 40, and the hot melt component 40 melts, thereby ending the axial constraint on the release rod 20. Under the action of the elastic component 50, the release rod 20 slides along the sliding cavity 110 to achieve the release action.

[0049] Compared to the prior art's mechanical weak-point breaking principle, where the release process requires almost all of the time needed to complete the break, the moment of breakage is very short, and the energy released at that moment is large, resulting in a slow and unstable release process. This application, on the other hand, utilizes an internally heated hot-melt release mechanism, which shortens the release time. Once the hot-melt member 40 is partially melted, the release rod 20 moves axially, initiating the release action. This ensures a fast and stable release process.

[0050] It should be noted that the elastic member 50 includes but is not limited to a spring; the hot melt member 40 includes but is not limited to fusible metal.

[0051] It should also be noted that the hot melt component 40 is provided with a hot melt hole for the heating component 30 to pass through, and the hot melt hole matches the shape of the heating component 30 so that the hot melt component 40 can slide along the heating component 30.

[0052] like Figure 1 As shown, in some embodiments, there is an annular gap between the hot melt 40 and the inner wall of the sliding cavity 110 .

[0053] The annular spacing is set to provide sufficient space for the hot melt member 40 to melt and for the release lever 20 to move.

[0054] like Figure 2 As shown, in some embodiments, the hot melt component 40 includes a first hot melt section 410, a second hot melt section 420 and a third hot melt section 430; the inner wall of the first hot melt section 410 is in contact with the heating element 30, and the outer diameter of the first hot melt section 410 gradually decreases along the axial direction of the heating element 30; the second hot melt section 420 is coaxially arranged with the first hot melt section 410, the inner wall of the second hot melt section 420 is in contact with the heating element 30, and the outer diameter of the second hot melt section 420 gradually increases along the axial direction of the heating element 30; the third hot melt section 430 is coaxially arranged with the first hot melt section 410, the inner wall of the second hot melt section 420 is in contact with the heating element 30, and the outer diameter of the second hot melt section 420 gradually increases along the axial direction of the heating element 30; The two ends of the segment 430 are respectively connected to the first hot melt segment 410 and the second hot melt segment 420, the inner wall of the third hot melt segment 430 is in contact with the heating element 30, and the third hot melt segment 430 is cylindrical; wherein, the outer diameter of the end of the first hot melt segment 410 away from the third hot melt segment 430 is greater than the outer diameter of the end of the first hot melt segment 410 close to the third hot melt segment 430; the outer diameter of the end of the second hot melt segment 420 away from the third hot melt segment 430 is greater than the outer diameter of the end of the second hot melt segment 420 close to the third hot melt segment 430.

[0055] By setting the outer diameter of the end of the first hot melt section 410 away from the third hot melt section 430 to be larger than the outer diameter of the end of the first hot melt section 410 close to the third hot melt section 430, and the outer diameter of the end of the second hot melt section 420 away from the third hot melt section 430 to be larger than the outer diameter of the end of the second hot melt section 420 close to the third hot melt section 430, the hot melt member 40 is made to have a narrow middle and wide ends structure. When the heating element 30 heats the hot melt member 40, the narrow middle portion of the hot melt member 40 will be completely melted first, that is, the third hot melt section 430 will be melted first. The hot melt is completely melted and then gradually transitions to the wide parts at both ends, so that during the melting process, the hot melt first melts from the middle to form two separate conical parts, and the molten liquid in the inner layer can flow out from the melted part to the annular space. Because the inner layer begins to melt first, it loses the support of the heating element 30, allowing the two conical parts to slide along the sliding cavity 110 before being completely melted. During the gradual release of the release rod 20, the two conical parts are pushed together, thereby gradually compressing the axial length of the hot melt part 40 until it is finally completely melted. Therefore, although the overall melting speed is relatively fast, the release rod 20 continues to move in the axial direction as the hot melt part 40 melts. In other words, the release of the release rod 20 is a process, not an instantaneous release, making the release process not only fast but also smooth.

[0056] By respectively attaching the first hot melt section 410 , the second hot melt section 420 , and the third hot melt section 430 to the heating element 30 , the heating path is further shortened and the melting is faster.

[0057] It should be noted that the first hot melt section 410 and the second hot melt section 420 are both truncated cone-shaped; the diameters of the first hot melt section 410 and the second hot melt section 420 close to the third hot melt section 430 are both D1, and the diameter of the third hot melt section 430 is D1.

[0058] In some embodiments, one end of the first hot melt section 410 away from the third hot melt section 430 abuts against the inner wall of the sliding cavity 110 , and one end of the second hot melt section 420 away from the third hot melt section 430 abuts against the inner wall of the sliding cavity 110 .

[0059] Since the first hot melt section 410 and the second hot melt section 420 are both melted by heat from the inner layer, after losing the support of the heating element 30, by setting the end of the first hot melt section 410 away from the third hot melt section 430 to abut against the inner wall of the sliding cavity 110, and the end of the second hot melt section 420 away from the third hot melt section 430 to abut against the inner wall of the sliding cavity 110, a guiding effect can be provided for the sliding of the two conical parts formed by the melt in the sliding cavity 110 before they are completely melted.

[0060] like Figure 1As shown, in some embodiments, the release rod 20 includes a first release section 210 and a second release section 220; the first release section 210 is movably disposed in the sliding cavity 110; one end of the second release section 220 is connected to the first release section 210, and the other end extends out of the opening 1101; wherein, the diameter of the second release section 220 is smaller than the diameter of the first release section 210 to form a release step surface 2201 that abuts against the elastic member 50.

[0061] The first release section 210 and the second release section 220 having different diameters are provided to provide a structural basis for the installation of the elastic member 50 .

[0062] It should be noted that the shape of the second releasing section 220 matches that of the opening 1101 , and the second releasing section 220 can slide in the opening 1101 .

[0063] like Figure 1 As shown, in some embodiments, a guide hole is provided inside the first release section 210 , and the heating element 30 matches the shape of the guide hole.

[0064] By providing the guide hole and cooperating with the heating element 30 , a sliding movement of the release rod 20 is guided, so that the release process of the release rod 20 is more stable.

[0065] It should be noted that the outer wall of the release rod 20 matches the shape of the inner wall of the sliding cavity 110, thereby guiding the sliding of the release rod 20, and the guide hole matches the heating element 30 to form a double guide slide, further ensuring the stability of the release process.

[0066] like Figure 1 As shown, in some embodiments, the housing 10 includes a first cavity section 1102 , a second cavity section 1103 , a third cavity section 1104 and a fourth cavity section 1105 that are sequentially arranged and connected along the axial direction of the release rod 20 .

[0067] The first cavity section 1102 , the second cavity section 1103 , the third cavity section 1104 and the fourth cavity section 1105 provide space and a structural basis for the installation of the release rod 20 , the heating element 30 and the hot melt element 40 .

[0068] like Figure 1 As shown, in some embodiments, the opening 1101 is located on the side of the first cavity section 1102 away from the second cavity section 1103, and the inner diameter of the opening 1101 is smaller than the inner diameter of the first cavity section 1102 to form a first step surface 1106 abutting against the elastic member 50; the diameter of the second cavity section 1103 is larger than the diameter of the third cavity section 1104 to form a second step surface 1107 abutting against the hot melt member 40.

[0069] It should be noted that the shape of the first release section 210 matches that of the second cavity section 1103, and the first release section 210 can slide along the second cavity section 1103; and the diameter of the third cavity section 1104 is smaller than the diameter of the fourth cavity section 1105, so as to form a third step surface that can abut against the heating element 30.

[0070] like Figure 1 As shown, in some embodiments, one end of the heating element 30 is threadedly connected to the fourth cavity segment 1105.

[0071] By setting the heating element 30 to be threadedly connected with the fourth cavity section 1105, the length of the heating element 30 extending into the sliding cavity 110 can be adjusted. When hot melt release is required, the heating element 30 can be rotated to adjust the length of the heating element 30 in the sliding cavity 110 to avoid the heating element 30 interfering with the moving length of the release rod 20, and then the release action can be performed, thereby ensuring safe use.

[0072] At least one embodiment of the present application further provides a logging bridle, comprising the bridle release structure of any embodiment of the present application, and thus having all the technical effects brought about by the technical solutions of the above embodiments.

[0073] While the present invention has been described with reference to preferred embodiments, various modifications may be made and equivalent components may be substituted without departing from the scope of the present invention. In particular, the various technical features described in the various embodiments may be combined in any manner, provided no structural conflicts exist. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A bridle release structure, characterized in that: include: a housing, wherein a sliding cavity is provided in the housing, and an opening of the sliding cavity is located at one end of the housing; a release rod movably disposed in the sliding cavity, with one end of the release rod extending out of the opening of the sliding cavity; a heating element, disposed at an end of the sliding cavity away from the opening, and the heating element is coaxially disposed with the release rod; a hot melt component, sleeved on the heating component, with two ends of the hot melt component respectively abutting against the release rod and the housing; and The elastic member is sleeved on the release rod, and two ends of the elastic member are respectively in contact with the housing and the release rod.

2. The bridle release structure according to claim 1, characterized in that: There is an annular distance between the hot melt component and the inner wall of the sliding cavity.

3. The bridle release structure according to claim 2, characterized in that: The hot melt component includes: a first hot-melt section, wherein an inner wall of the first hot-melt section is in contact with the heating element, and an outer diameter of the first hot-melt section gradually decreases along an axial direction of the heating element; a second hot melt section, coaxially arranged with the first hot melt section, wherein the inner wall of the second hot melt section is in contact with the heating element, and the outer diameter of the second hot melt section gradually increases along the axial direction of the heating element; and a third hot melt section, whose two ends are respectively connected to the first hot melt section and the second hot melt section, an inner wall of the third hot melt section is in contact with the heating element, and the third hot melt section is cylindrical; Among them, the outer diameter of the end of the first hot melt section away from the third hot melt section is larger than the outer diameter of the end of the first hot melt section close to the third hot melt section; the outer diameter of the end of the second hot melt section away from the third hot melt section is larger than the outer diameter of the end of the second hot melt section close to the third hot melt section.

4. The bridle release structure according to claim 3, characterized in that: One end of the first hot melt section away from the third hot melt section abuts against the inner wall of the sliding cavity, and one end of the second hot melt section away from the third hot melt section abuts against the inner wall of the sliding cavity.

5. The bridle release structure according to any one of claims 1 to 4, characterized in that: The release lever comprises: A first releasing section is movably disposed in the sliding cavity; and a second release section, one end of which is connected to the first release section and the other end of which extends out of the opening; Wherein, the diameter of the second release section is smaller than the diameter of the first release section, so as to form a release step surface abutting against the elastic member.

6. The bridle release structure according to claim 5, characterized in that: A guide hole is provided inside the first release section, and the heating element matches the shape of the guide hole.

7. The bridle release structure according to any one of claims 1 to 4, characterized in that: The housing includes a first cavity section, a second cavity section, a third cavity section, and a fourth cavity section which are sequentially arranged and communicated with each other along the axial direction of the release rod.

8. The bridle release structure according to claim 7, characterized in that: The opening is located on a side of the first cavity section away from the second cavity section, and the inner diameter of the opening is smaller than the inner diameter of the first cavity section, so as to form a first step surface abutting against the elastic member; The diameter of the second cavity section is greater than the diameter of the third cavity section to form a second step surface abutting against the hot melt component.

9. The bridle release structure according to claim 7, characterized in that: One end of the heating element is threadedly connected to the fourth cavity segment.

10. A well logging bridle, characterized in that: The invention comprises a bridle releasing structure according to any one of claims 1 to 9.

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