Fusing type releasing device and method for well logging headstall

Abstract

The invention relates to the technical field of petroleum well logging, and discloses a fusing type releasing device and method for a well logging headstall, a split brake block is arranged in a second cavity of a lower connector and an outer shell, a heating rod is arranged on the split brake block in a surrounding mode, and the surface of the split brake block is wrapped with a fusing protection layer; the heating rod is attached to the fusing protection layer, the driving end of the high-voltage connector is connected with the power supply end of the heating rod through the lower connector, the heating rod is driven to heat and fuse the fusing protection layer, and after the fusing protection layer is fused, the split braking blocks are separated. The elastic ejector rod assembly abutting against the split brake block integrally moves towards the side of the split brake block, the brake hook is separated from the outer shell, headstall release is achieved, the whole operation can be completed only by opening the high-voltage connector, the operation process is simple, and unified treatment can be conducted on different cables and well depths.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil logging, in particular to a logging crown block fuse release device and method. BACKGROUND

[0002] The crown block weak point design is to separate the cable from the instrument string when the instrument string is stuck and cannot be released during logging operation, to avoid cable breakage during logging, and to reduce the difficulty of complex on-site disposal. The existing common weak point is to set a mechanical tension rod in the crown block. When the instrument string is stuck and cannot be pulled out, the tension rod is pulled off by increasing the cable tension, thereby protecting the logging cable and reducing the difficulty of complex disposal.

[0003] The mechanical tension rod currently in use has the following defects:

[0004] (1) Different cables and different well depths require different types of tension rods, and the commonly used rated load is 3K-10K, with a large variety of types;

[0005] (2) The tension rod in the crown block needs to be replaced regularly during normal logging construction, which is costly;

[0006] (3) The tension rod has thermal decay at high temperatures at the well bottom, and tests show that the rated load decays by 5% at 230℃;

[0007] (4) During logging operation, sudden high tension caused by instrument sticking can easily cause false pull-off;

[0008] (5) As the well depth increases, the tension that can act on the tension rod becomes smaller and smaller, so the deeper the well depth, the smaller the tension rod setting, and ultimately cannot meet the normal logging requirements. SUMMARY

[0009] The present application aims to provide a logging crown block fuse release device and method to solve the technical problem that the mechanical tension rod in the prior art is not easy to operate in the crown block and cannot uniformly handle different cables and well depths.

[0010] The present application is achieved by the following technical solutions:

[0011] In a first aspect, the present application provides a logging crown block fuse release device, comprising a brake hook, an outer shell, an elastic top rod assembly, a lower connector and a high-voltage connector;

[0012] The outer shell is provided with a first cavity and a second cavity, and the first cavity and the second cavity are communicated through a through hole;

[0013] One end of the brake hook is connected to the cable, and the other end is sleeved in the first cavity of the outer shell;

[0014] One end of the lower connector is connected to the logging instrument; the other end is fitted into the second cavity of the outer shell.

[0015] A split braking block is provided between the lower connector and the second cavity; a heating rod is surrounded on the split braking block, and the surface of the split braking block is covered with a fusible protective layer; the heating rod is attached to the fusible protective layer.

[0016] The driving end of the high-voltage connector is connected to the power supply end of the heating rod via a lower connector.

[0017] One end of the elastic push rod assembly abuts against the brake hook, and the other end passes through the first cavity and through hole of the outer shell in sequence, and abuts against the split brake block in the second cavity.

[0018] Preferably, a first shock-absorbing pad is provided between the lower connector and the second cavity;

[0019] The split brake block and the heating rod are both wrapped inside the first shock-absorbing pad, and a second shock-absorbing pad is provided between the heating rod and the first shock-absorbing pad.

[0020] Preferably, an insulating block is provided on the side wall of the lower connector near the second cavity;

[0021] The split braking block abuts against one end of the insulating block, and a third shock-absorbing pad is provided between the other end of the insulating block and the inner wall of the lower connector.

[0022] The lower connector is provided with a connector on the side wall outside the second cavity; the connector is used to connect with logging instruments; a disc spring is provided between the third shock absorber and the connector.

[0023] Preferably, the brake hook includes a brake hook body and a mechanical claw;

[0024] One end of the brake hook is connected to a cable, and the other end abuts against the outer shell. A fourth shock-absorbing pad is provided between the end of the brake hook and the outer shell.

[0025] The mechanical claw is located at one end of the brake hook body near the outer shell. The mechanical claw extends into the first cavity of the outer shell, and the claw of the mechanical claw is clamped to the elastic push rod assembly.

[0026] Furthermore, the sidewall of the first cavity near the through hole is wedge-shaped and corresponds to the outer side of the claw of the mechanical gripper.

[0027] Furthermore, the brake hook body is equipped with a retaining ring and a washer;

[0028] The retaining ring is disposed on the inner end of the brake hook body, and the end of the elastic push rod assembly is sleeved inside the retaining ring;

[0029] The gasket is fitted between the end of the elastic push rod assembly and the retaining ring.

[0030] Furthermore, the resilient push rod assembly includes a sealing push rod and a spring;

[0031] One end of the sealing top rod abuts against the brake hook body, and the other end passes through the first cavity and through the through hole of the outer shell and abuts against the split brake block in the second cavity.

[0032] The spring 4 is sleeved on the sealing top rod 3 and located inside the through hole of the outer shell 2.

[0033] Furthermore, the sealing top rod includes a first rod body, a second rod body, and a third rod body;

[0034] One end of the first rod abuts against the brake hook body, and the other end extends into the first cavity of the outer shell and is integrally connected to one end of the second rod. The other end of the second rod extends into the through hole and is integrally connected to one end of the third rod. The other end of the third rod extends into the second cavity of the outer shell and abuts against the split brake block.

[0035] The second rod is provided with a baffle, and the spring is sleeved on the second rod, with one end connected to the inside of the through hole and the other end connected to the baffle.

[0036] Furthermore, the diameter of the second rod is larger than that of the first and second rods; the mechanical claw grips the first or second rod.

[0037] Secondly, the present invention also provides a logging bridle fuse release method, based on the above-described logging bridle fuse release device, comprising the following process:

[0038] Connect the brake hook to the cable and the lower connector to the logging instrument. When the bridle needs to be released, apply a specific pressure to the high-pressure connector. The high-pressure connector drives the heating rod to heat up. The heated rod burns off the fusible protective layer wrapped around the surface of the split brake block, causing the split brake block to separate. The elastic push rod assembly moves as a whole into the second cavity, causing the brake hook to disengage from the first cavity of the outer shell.

[0039] Compared with the prior art, the present invention has the following beneficial technical effects:

[0040] This invention provides a logging bridle release device with a fusible link. A heating rod is surrounded by a split braking block within the second cavity of the lower connector and outer shell, and the surface of the split braking block is covered with a fusible protective layer. The heating rod is attached to the fusible protective layer and connected to the power supply end of the heating rod via the lower connector through the driving end of a high-voltage connector. The heating rod heats and melts the fusible protective layer. When the fusible protective layer melts, the split braking block separates, causing the elastic push rod assembly abutting against the split braking block to move towards the split braking block side, thus releasing the bridle. The entire operation can be completed simply by opening the high-voltage connector, making the operation simple and allowing for uniform handling of different cables and well depths.

[0041] Furthermore, a first shock-absorbing pad is provided between the lower connector and the second cavity; the split brake block and the heating rod are both wrapped in the first shock-absorbing pad, and a second shock-absorbing pad is provided between the heating rod and the first shock-absorbing pad. The first and second shock-absorbing pads can effectively reduce the severe vibrations experienced by the split brake block and the heating rod in the lateral or longitudinal direction, and play a stabilizing role in the position of the split brake block and the heating rod between the lower connector and the second cavity.

[0042] Furthermore, an insulating block is provided on the side wall of the lower connector near the second cavity; the split braking block abuts against one end of the insulating block, and a third shock-absorbing pad is provided between the other end of the insulating block and the inner wall of the lower connector, making the position of the split braking block more stable in the lower connector. At the same time, the third shock-absorbing pad also reduces the severe vibration experienced by the split braking block, heating rod, and insulating block in the lateral or longitudinal direction, and plays a stabilizing role in the position of the split braking block, heating rod, and insulating block between the lower connector and the second cavity; a connector is provided on the side wall of the lower connector on the outer side of the second cavity; the connector is used to connect with logging instruments; a disc spring is provided between the third shock-absorbing pad and the connector. Through the cooperation of the disc spring and the third shock-absorbing pad, it can be ensured that the connection part between the split braking block and the connector in the device can still work normally after being subjected to severe lateral vibration.

[0043] Furthermore, the brake hook includes a brake hook body and a mechanical claw; one end of the brake hook body is connected to a cable, and the other end abuts against the outer shell, and a fourth shock-absorbing pad is provided between the end of the brake hook body and the end of the outer shell; the fourth shock-absorbing pad can ensure that the connection between the end of the brake hook and the outer shell can withstand lateral vibration, and the mechanical claw is set at the end of the brake hook body near the outer shell. The mechanical claw extends into the first cavity of the outer shell, and the hook of the mechanical claw is clamped and set with the elastic push rod assembly to ensure the stability of the brake hook assembly between the outer shells.

[0044] Furthermore, the sidewall of the first cavity near the through hole is wedge-shaped and corresponds to the outer side of the claw of the mechanical claw, which limits the position of the mechanical claw in the first cavity. At the same time, when the release action is performed, the wedge-shaped structure guides the mechanical claw to disengage from the sidewall of the first cavity.

[0045] Furthermore, the elastic push rod assembly includes a sealing push rod and a spring; one end of the sealing push rod abuts against the brake hook body, and the other end passes through the first cavity and through hole of the outer shell and abuts against the split brake block in the second cavity; the spring is sleeved on the sealing push rod and located in the through hole of the outer shell. The spring can ensure that the connection between the end of the outer shell and the brake hook can withstand lateral or longitudinal vibration, and at the same time, it provides a thrust to the sealing push rod.

[0046] Furthermore, the sealing top rod includes a first rod body, a second rod body, and a third rod body; one end of the first rod body abuts against the brake hook body, and the other end extends into the first cavity of the outer shell and is integrally connected to one end of the second rod body; the other end of the second rod body extends into the through hole and is integrally connected to one end of the third rod body; the other end of the third rod body extends into the second cavity of the outer shell and abuts against the split brake block; a baffle is provided on the second rod body; the spring is sleeved on the second rod body, with one end connected to the inner side of the end of the through hole and the other end connected to the baffle, so that the spring exerts a pushing force on the overall sealing top rod on the second rod body, which facilitates pushing the sealing top rod towards the split brake block when released, so that the brake hook can disengage from the outer shell.

[0047] Furthermore, the diameter of the second rod is larger than that of the first and second rods; the mechanical claw clamps onto the first or second rod. When not released, the mechanical claw clamps onto the second rod, causing the entire mechanical claw to be spread open, fixing the position of the brake hook in the first cavity of the outer shell. When released, the sealing top rod moves towards the split brake block, causing the mechanical claw to clamp onto the first rod. Since the diameter of the first rod is smaller than that of the second rod, the mechanical claw's rod retracts, making it easier for the brake hook to detach from the outer shell.

[0048] This invention also provides a logging bridle fuse release method, which uses an electrically controlled release device to replace the traditional mechanical tension rod. When needed, the bridle weak point is released through a cable-transmitted signal, realizing manual control of the weak point release, which is safer and more reliable than the traditional mechanical weak point release. Attached Figure Description

[0049] Figure 1 This is a schematic diagram of the structure of the present invention;

[0050] Figure 2 This is a schematic diagram of the structure after the invention is released.

[0051] In the diagram: 1-Brake hook; 2-Outer shell; 3-Sealing top rod; 4-Spring; 5-Lower connector; 6-First shock absorber; 7-Split brake block; 8-Fuse protection layer; 9-Disc spring; 10-Connector; 11-Second shock absorber; 12-Heating rod; 13-Insulating block; 14-Third shock absorber; 15-High voltage connector; 16-Retaining ring; 17-Washer; 18-Brake hook body; 19-Mechanical claw; 20-Fourth shock absorber; 31-First rod; 32-Second rod; 33-Third rod; 34-Baffle; Detailed Implementation

[0052] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0053] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0054] The present invention will now be described in further detail with reference to the accompanying drawings:

[0055] The purpose of this invention is to provide a logging bridle-type release device and method to solve the technical problem that the mechanical tension rod is not easy to operate inside the bridle in the prior art, and cannot achieve uniform treatment for different cables and well depths.

[0056] Example 1

[0057] See Figure 1In one embodiment of the present invention, a logging bridle-type release device is provided, comprising a brake hook 1, an outer shell 2, an elastic push rod assembly, a lower connector 5, and a high-voltage connector 15; the outer shell 2 has a first cavity and a second cavity, which are connected by a through hole; one end of the brake hook 1 is connected to a cable, and the other end is sleeved in the first cavity of the outer shell 2; one end of the lower connector 5 is connected to a logging instrument; the other end is threaded in the second cavity of the outer shell 2; a split brake block 7 is provided between the lower connector 5 and the second cavity; a heating rod 12 is surrounded on the split brake block 7, and the surface of the split brake block 7 is covered with a fusible protective layer 8; the heating rod 12 is attached to the fusible protective layer 8; the driving end of the high-voltage connector 15 is connected to the power supply end of the heating rod 12 through the lower connector 5; one end of the elastic push rod assembly abuts against the brake hook 1, and the other end passes through the first cavity and the through hole of the outer shell 2 in sequence, and abuts against the split brake block 7 in the second cavity.

[0058] Specifically, a first shock-absorbing pad 6 is provided between the lower connector 5 and the second cavity; the split brake block 7 and the heating rod 12 are both wrapped inside the first shock-absorbing pad 6, and a second shock-absorbing pad 11 is provided between the heating rod 12 and the first shock-absorbing pad 6.

[0059] In this embodiment, the first shock-absorbing pad 6 and the second shock-absorbing pad 11 can effectively reduce the severe vibrations experienced by the split brake block 7 and the heating rod 12 in the lateral or longitudinal direction, and play a stabilizing role in the position of the split brake block 7 and the heating rod 12 between the lower connector 5 and the second cavity.

[0060] Specifically, an insulating block 13 is provided on the side wall of the lower connector 5 near the second cavity; a split braking block 7 abuts against one end of the insulating block 13, and a third shock-absorbing pad 14 is provided between the other end of the insulating block 13 and the inner wall of the lower connector 5; a connector 10 is provided on the side wall of the lower connector 5 located outside the second cavity; the connector 10 is used to connect with logging instruments; a disc spring 9 is provided between the third shock-absorbing pad 14 and the connector 10.

[0061] In this embodiment, the third shock-absorbing pad 14 makes the position of the split brake block 7 within the lower connector 5 more stable. At the same time, the third shock-absorbing pad 14 also reduces the severe vibrations experienced by the split brake block 7, heating rod 12, and insulating block 13 in the lateral or longitudinal direction, and plays a stabilizing role in the position of the split brake block 7, heating rod 12, and insulating block 13 between the lower connector and the second cavity.

[0062] In this embodiment, the cooperation between the disc spring 9 and the third shock-absorbing pad 14 ensures that the connection between the split brake block 7 and the connector 10 in the device can still work normally after being subjected to severe lateral vibration.

[0063] Specifically, the brake hook 1 includes a brake hook body 18 and a mechanical claw 19; one end of the brake hook body 18 is connected to a cable, and the other end abuts against the outer shell 2, and a fourth shock-absorbing pad 20 is provided between the brake hook body 18 and the end of the outer shell 2.

[0064] In this embodiment, the fourth shock-absorbing pad 20 can ensure that the connection between the end of the brake hook 1 and the outer shell 2 can withstand lateral vibration.

[0065] The mechanical claw 19 is located at one end of the brake hook body 18 near the outer shell 2. The mechanical claw 19 extends into the first cavity of the outer shell 2, and the claw of the mechanical claw 19 is clamped with the elastic push rod assembly to ensure the stability of the brake hook 1 in the assembly between the outer shells 2.

[0066] The side wall of the first cavity near the through hole is wedge-shaped and corresponds to the outer side of the hook of the mechanical claw 19, which limits the position of the mechanical claw 19 in the first cavity. At the same time, when the release action is performed, the wedge-shaped structure guides the mechanical claw 19 to disengage from the side wall of the first cavity.

[0067] The brake hook body 18 is provided with a retaining ring 16 and a washer 17. The retaining ring 16 is located at the inner end of the brake hook body 18, and the end of the elastic push rod assembly is sleeved in the retaining ring 16. The washer 17 is sleeved between the end of the elastic push rod assembly and the retaining ring 16.

[0068] The elastic push rod assembly includes a sealing push rod 3 and a spring 4. One end of the sealing push rod 3 abuts against the brake hook body 18, and the other end passes through the first cavity and through hole of the outer shell 2, abutting against the split brake block 7 in the second cavity. The spring 4 is sleeved on the sealing push rod 3 and is located in the through hole of the outer shell 2. The spring 4 can ensure that the connection between the end of the outer shell 2 and the brake hook 1 can withstand lateral or longitudinal vibration, and at the same time, it provides a thrust to the sealing push rod 3.

[0069] The sealing top rod 3 includes a first rod body 31, a second rod body 32 and a third rod body 33;

[0070] One end of the first rod 31 abuts against the brake hook 18, and the other end extends into the first cavity of the outer shell 2 and is integrally connected to one end of the second rod 32. The other end of the second rod 32 extends into the through hole and is integrally connected to one end of the third rod 33. The other end of the third rod 33 extends into the second cavity of the outer shell 2 and abuts against the split brake block 7.

[0071] The second rod 32 is provided with a baffle 34. The spring 4 is sleeved on the second rod 32, with one end connected to the inner side of the through hole end and the other end connected to the baffle 34. This allows the spring 4 to exert a pushing force on the overall sealing top rod 3 on the second rod 32, so that when released, it can push the sealing top rod 3 towards the split brake block 7, allowing the brake hook 1 to disengage from the outer shell 2.

[0072] The diameter of the second rod 32 is larger than that of the first rod 31 and the second rod 32; the mechanical claw 19 is clamped on the first rod 31 or the second rod 32.

[0073] In this embodiment, when not released, the mechanical claw 19 is clamped onto the second rod 32, causing the entire mechanical claw 19 to be stretched open, fixing the position of the brake hook 1 in the first cavity of the outer shell 2. When released, the sealing top rod 3 moves towards the split brake block 7, causing the mechanical claw 19 to clamp onto the first rod 31. Since the diameter of the first rod 31 is smaller than that of the second rod 32, the retraction of the mechanical claw 19 facilitates the brake hook's disengagement from the outer shell. Figure 2 As shown.

[0074] In summary, this invention provides a logging bridle release device with a fusible link. A heating rod is surrounded by a split braking block within the second cavity of the lower connector and outer shell, and the surface of the split braking block is covered with a fusible protective layer. The heating rod is attached to the fusible protective layer, and the driving end of the high-voltage connector is connected to the power supply end of the heating rod through the lower connector. The heating rod is driven to heat and fuse the fusible protective layer. When the fusible protective layer melts, the split braking block separates, causing the elastic push rod assembly abutting against the split braking block to move towards the split braking block side, thus releasing the bridle. The entire operation can be completed simply by opening the high-voltage connector, making the operation simple and allowing for uniform handling of different cables and well depths.

[0075] Example 2

[0076] This embodiment provides a logging bridle fuse release method, based on the aforementioned logging bridle fuse release device, including the following process:

[0077] Connect the brake hook 1 to the cable and the lower connector 5 to the logging instrument. When the bridle needs to be released, apply a specific pressure to the high-pressure connector 15. The high-pressure connector 15 supplies power to the heating rod 12 to heat it to 300°C. The heated heating rod 12 burns off the fusible protective layer 8 wrapped around the surface of the split brake block 7, causing the split brake block 7 to separate. The elastic push rod assembly moves as a whole into the second cavity, causing the brake hook 1 to come out of the first cavity of the outer shell 2. At this time, the claw of the brake hook 1 is forced to retract, and the cable-connected brake hook 1 can be pulled out of the outer shell 2, realizing the release of the bridle and the separation of the cable from the logging instrument.

[0078] In this embodiment, an electrical weakness is utilized. When the bridle needs to be released, the fuse circuit cuts off the power supply to the logging instrument, and the ground can only supply power to the fuse device. The fuse device provides a specific voltage, and the heating device melts the high-temperature fuse within 60 seconds. The sealing rod 3 moves to the right under the action of the spring 4 and disengages from the brake hook 1. At this time, the cable connecting brake hook 1 can be pulled out from the outer shell 2, realizing the release of the bridle. After release, only 50KG of pulling force is needed to ensure the cable is released, which is safer and more reliable than the traditional mechanical pull bar.

[0079] In this embodiment, the brake hook 1 is made of 65Mn, TC4, 50CrVA or QBe2 shape memory material. When it is subjected to external force, it will deform. However, after the external force disappears, the brake hook will return to its original shape, which improves the service life of the device.

[0080] In summary, the present invention provides a logging bridle fuse release method that uses an electrically controlled release device to replace the traditional mechanical tension rod. When needed, the bridle weak point is released through a cable-transmitted signal, realizing manual control of the weak point release, which is safer and more reliable than the traditional mechanical weak point release method.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the protection scope of the claims of the present invention.

Claims

1. A logging horse bridle-type release device, characterized in that, Includes a brake hook (1), a housing (2), a resilient push rod assembly, a lower connector (5), and a high-voltage connector (15); The outer shell (2) is provided with a first cavity and a second cavity, and the first cavity and the second cavity are connected through a through hole; One end of the brake hook (1) is connected to a cable, and the other end is sleeved in the first cavity of the outer shell (2); One end of the lower connector (5) is connected to the logging instrument; the other end is fitted into the second cavity of the outer shell (2); A split braking block (7) is provided between the lower connector (5) and the second cavity; a heating rod (12) is arranged around the split braking block (7), and the surface of the split braking block (7) is covered with a fusible protective layer (8); the heating rod (12) is attached to the fusible protective layer (8); The driving end of the high-voltage connector (15) is connected to the power supply end of the heating rod (12) through the lower connector (5); One end of the elastic push rod assembly abuts against the brake hook (1), and the other end passes through the first cavity and through hole of the outer shell (2) in sequence, and abuts against the split brake block (7) in the second cavity.

2. The logging horse bridle fuse-type release device according to claim 1, characterized in that, A first shock-absorbing pad (6) is provided between the lower connector (5) and the second cavity; The split brake block (7) and the heating rod (12) are both wrapped inside the first shock-absorbing pad (6), and a second shock-absorbing pad (11) is provided between the heating rod (12) and the first shock-absorbing pad (6).

3. The logging horse bridle fusible release device according to claim 1, characterized in that, An insulating block (13) is provided on the side wall of the lower connector (5) near the second cavity; The split braking block (7) abuts against one end of the insulating block (13), and a third shock-absorbing pad (14) is provided between the other end of the insulating block (13) and the inner wall of the lower connector (5); The lower connector (5) is provided with a connector (10) on the side wall outside the second cavity; the connector (10) is used to connect with the logging instrument; a disc spring (9) is provided between the third shock absorber (14) and the connector (10).

4. The logging horse bridle fusible release device according to claim 1, characterized in that, The brake hook (1) includes a brake hook body (18) and a mechanical claw (19); One end of the brake hook (18) is connected to a cable, and the other end abuts against the outer shell (2). A fourth shock-absorbing pad (20) is provided between the brake hook (18) and the end of the outer shell (2). The mechanical claw (19) is located at one end of the brake hook body (18) near the outer shell (2). The mechanical claw (19) extends into the first cavity of the outer shell (2), and the claw of the mechanical claw (19) is clamped to the elastic push rod assembly.

5. A logging horse bridle-type release device according to claim 4, characterized in that, The sidewall of the first cavity near the through hole is wedge-shaped and corresponding to the outer side of the hook of the mechanical claw (19).

6. A logging horse bridle-type release device according to claim 4, characterized in that, The brake hook body (18) is provided with a retaining ring (16) and a gasket (17); The retaining ring (16) is disposed on the inner end of the brake hook body (18), and the end of the elastic push rod assembly is sleeved inside the retaining ring (16); The gasket (17) is fitted between the end of the elastic push rod assembly and the retaining ring (16).

7. A logging horse bridle-type release device according to claim 4, characterized in that, The elastic push rod assembly includes a sealing push rod (3) and a spring (4); One end of the sealing top rod (3) abuts against the brake hook body (18), and the other end abuts against the split brake block (7) in the second cavity through the first cavity and through hole of the outer shell (2); The spring (4) is sleeved on the sealing top rod (3) and located in the through hole of the outer shell (2).

8. A logging bridle-type release device according to claim 7, characterized in that, The sealing top rod (3) includes a first rod body (31), a second rod body (32) and a third rod body (33); One end of the first rod (31) abuts against the brake hook (18), and the other end extends into the first cavity of the outer shell (2) and is integrally connected to one end of the second rod (32). The other end of the second rod (32) extends into the through hole and is integrally connected to one end of the third rod (33). The other end of the third rod (33) extends into the second cavity of the outer shell (2) and abuts against the split brake block (7). The second rod (32) is provided with a baffle (34), and the spring (4) is sleeved on the second rod (32), with one end connected to the inner side of the through hole end and the other end connected to the baffle (34).

9. A logging horse bridle-type release device according to claim 8, characterized in that, The diameter of the second rod (32) is larger than that of the first rod (31) and the second rod (32); the mechanical claw (19) is clamped on the first rod (31) or the second rod (32).

10. A method for releasing a logging horse bridle by fusion, characterized in that, A logging valve release device based on any one of claims 1-9 includes the following process: Connect the brake hook (1) to the cable and connect the lower connector (5) to the logging instrument. When the bridle needs to be released, apply a specific pressure to the high-pressure connector (15). The high-pressure connector (15) drives the heating rod (12) to heat up. The heated heating rod (12) burns off the fusible protective layer (8) wrapped around the surface of the split brake block (7), causing the split brake block (7) to separate. The elastic push rod assembly moves as a whole into the second cavity, causing the brake hook (1) to come out of the first cavity of the outer shell (2).

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