Logging releasable headstall structure

Abstract

The utility model discloses a releasable headstall structure for well logging, which belongs to the technical field of well logging and comprises a headstall pipe body, a well logging electrical apparatus element and a cable body, clamping blocks are slidably connected in two sliding grooves, two push-pull electromagnets which are symmetrically distributed are embedded in a clamping ferrule, and the two push-pull electromagnets are connected with the clamping ferrule in a sliding mode. The output ends of the two push-pull electromagnets are fixedly connected with the two clamping blocks correspondingly, a connecting column is movably connected into the clamping ferrule, a tension sensor is installed on the upper end face of the connecting column, and when the headstall pipe body is clamped in a well, the cable body is pulled, so that a connector pulls the connecting column through the tension sensor, and the cable body is pulled to pull the connecting column. When the tension exceeds a set value of the tension sensor, the push-pull electromagnet is started through the controller, the output end of the push-pull electromagnet drives the clamping block to enter the sliding groove, the cable body pulls out the connecting column from the interior of the clamping ferrule, and the cable clamping device has the advantages of being capable of preventing the cable from being broken, high in working efficiency and good in sealing effect.

Description

Technical Field

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

[0002] The bridle is an instrument used to connect the cable and the logging instrument and facilitate the transportation of the instrument down the well. During logging work, if the releasable bridle is in a deep well or at a large angle and the instrument gets stuck, the mechanical pulling force provided by the winch is required to pull the cable out of the releasable bridle structure, thereby separating the cable from the instrument and preventing the cable from breaking and falling into the well. In addition, since the operation is in a deep well, it is necessary to ensure the safety of the electrical components inside the bridle structure and the sealing of the location where the electrical components are located to avoid damage from well water.

[0003] When the existing bridle structure is in use, due to the complex well conditions of the logging well, the mechanical tension provided by the test winch may cause the cable to break, resulting in cable fragments left on the top of the bridle, which increases the difficulty of subsequent accident handling, complicates downhole accidents, affects work efficiency, and increases operating costs. In addition, the existing bridle structure has a poor sealing effect, which may cause well water to enter the interior and damage electrical components. Utility Model Content

[0004] In order to solve the problems in the above background, the utility model provides a releasable logging bridle structure, which has the characteristics of preventing cable breakage, high working efficiency and good sealing effect.

[0005] The utility model is implemented as follows: a releasable logging bridle structure includes a bridle tube body, a logging electrical component, and a cable body; the lower end surface of the bridle tube body is threadedly connected to a bottom shell; the logging electrical component is mounted on the inner bottom surface of the bottom shell; a clamping ring is fixedly connected to the inner wall of the bridle tube body; the inner wall of the clamping ring is provided with two symmetrically distributed sliding grooves; the interiors of the two sliding grooves are both slidably connected to a clamping block; two symmetrically distributed push-pull electromagnets are embedded and installed in the interior of the clamping ring; the output ends of the two push-pull electromagnets are respectively fixedly connected to the two clamping blocks;

[0006] The internal movably connected part of the clamping ring is provided with a connecting column, the upper end face of the connecting column is provided with a tension sensor, the cable body is fixedly connected to the upper end face of the tension sensor through a connector, the outer wall of the connecting column is provided with two clamping grooves matching the clamping block, and the outer wall of the connecting column is fixedly connected with two symmetrically distributed limit blocks.

[0007] In order to limit the connecting column, as a preferred structure of a well logging releasable bridle of the present invention, the inner wall of the bridle tube body is fixedly connected to a limiting ring located above the clamping ring, and the inner wall of the limiting ring is provided with two limiting grooves matching the limiting block.

[0008] In order to increase the sealing performance of the device, as a preferred structure of a well logging releasable bridle of the present invention, the lower end face of the clamping ring is fixedly connected to a sealing bottom plate, and a sealing ring is provided between the bridle tube body and the bottom shell.

[0009] In order to facilitate the movement of the clamping blocks, as a preferred structure of a well logging releasable bridle of the present invention, the opposite ends of the two clamping blocks are both arranged as inclined surfaces.

[0010] In order to make the push-pull electromagnet operate normally, as a preferred structure of a well logging releasable bridle of the present invention, the outer wall of the limiting ring is provided with two symmetrically distributed through grooves.

[0011] For the convenience of operation, as a preferred structure of a well logging releasable bridle of the present invention, a controller located above the well logging electrical components is provided inside the bottom shell.

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

[0013] The utility model has the advantages that when the bridle tube body is stuck in the well, the cable body is pulled so that the connector pulls the connecting column through the tension sensor; when the pulling force exceeds the set value of the tension sensor, the push-pull electromagnet is started by the controller, the tension sensor transmits the signal to the controller, and then the output end of the push-pull electromagnet drives the card block into the sliding groove, so that the cable body pulls the connecting column out of the inside of the clamping ring, thereby preventing the cable from breaking, having high working efficiency and good sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the overall structural diagram of a releasable well logging bridle structure of the utility model;

[0015] Figure 2 This is the overall cutaway structural diagram of the present utility model;

[0016] Figure 3 This is a structural diagram of the connecting column of the utility model;

[0017] Figure 4 For this utility model Figure 2 Enlarged view of point A in the middle.

[0018] In the figure, 1. bridle tube body; 2. bottom shell; 3. clamping ring; 4. limiting ring; 5. connecting column; 6. tension sensor; 7. connector; 8. cable body; 9. limiting groove; 10. limiting block; 11. clamping groove; 12. push-pull electromagnet; 13. sliding groove; 14. clamping block; 15. sealing bottom plate; 16. through groove; 17. controller; 18. logging electrical component; 19. sealing ring. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] In the description of the present invention, it should be understood that the terms "length," "width," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," and the like, indicating positions or location relationships, are based on the positions or location relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, in the description of the present invention, "plurality" means two or more, unless otherwise expressly and specifically defined.

[0021] See also Figure 1-4 A well logging releasable bridle structure includes a bridle body 1, a well logging electrical component 18, and a cable body 8. The lower end surface of the bridle body 1 is threadedly connected to a bottom shell 2, and the well logging electrical component 18 is installed on the inner bottom surface of the bottom shell 2. A clamping ring 3 is fixedly connected to the inner wall of the bridle body 1. The inner wall of the clamping ring 3 is provided with two symmetrically distributed sliding grooves 13. The insides of the two sliding grooves 13 are slidably connected with a clamping block 14. Two symmetrically distributed push-pull electromagnets 12 are embedded and installed in the inside of the clamping ring 3. The output ends of the two push-pull electromagnets 12 are respectively fixedly connected to the two clamping blocks 14;

[0022] The internal movable connection of the clamping ring 3 is provided with a connecting column 5, the upper end face of the connecting column 5 is installed with a tension sensor 6, the cable body 8 is fixedly connected to the upper end face of the tension sensor 6 through the connector 7, the outer wall of the connecting column 5 is provided with two clamping grooves 11 matching the clamping block 14, and the outer wall of the connecting column 5 is fixedly connected with two symmetrically distributed limit blocks 10.

[0023] In this embodiment, the connecting post 5 is inserted into the interior of the bridle tube body 1, so that the connecting post 5 enters the interior of the clamping ring 3. The connecting post 5 squeezes the clamping block 14, so that the clamping block 14 pushes the output end of the push-pull electromagnet 12 into the interior of the sliding groove 13. When the bottom end of the connecting post 5 is flush with the lower end surface of the clamping ring 3, the clamping groove 11 is aligned with the sliding groove 13. The spring at the output end of the push-pull electromagnet 12 squeezes the clamping block 14, so that the clamping block 14 enters the clamping groove 11, and the connecting post 5 is fixed inside the clamping ring 3.

[0024] When the bridle tube body 1 is stuck in the well, by pulling the cable body 8, the connector 7 pulls the connecting column 5 through the tension sensor 6. When the pulling force exceeds the set value of the tension sensor 6, the tension sensor 6 transmits a signal to the controller 17, and then the push-pull electromagnet 12 is started through the controller 17, so that the output end of the push-pull electromagnet 12 drives the card block 14 into the sliding groove 13, so that the cable body 8 pulls the connecting column 5 out from the inside of the clamping ring 3, preventing the cable from breaking, with high working efficiency and good sealing effect.

[0025] As a technical optimization solution of the present invention, the inner wall of the bridle tube body 1 is fixedly connected with a limiting ring 4 located above the clamping ring 3, and the inner wall of the limiting ring 4 is provided with two limiting grooves 9 matching the limiting block 10.

[0026] In this embodiment, the connection column 5 drives the limiting block 10 to move inside the limiting groove 9, so as to facilitate the limiting of the connection column 5.

[0027] As a technical optimization solution of the present invention, the lower end surface of the clamping ring 3 is fixedly connected to the sealing bottom plate 15 , and a sealing ring 19 is provided between the bridle tube body 1 and the bottom shell 2 .

[0028] In this embodiment, the sealing performance of the device is increased by the sealing bottom plate 15 and the sealing ring 19 to prevent the well water from damaging the well logging electrical components 18 .

[0029] As a technical optimization solution of the present invention, opposite ends of the two clamping blocks 14 are both configured as inclined surfaces.

[0030] In this embodiment, the opposite ends of the two clamping blocks 14 are both configured as inclined surfaces, so as to facilitate the clamping of the connecting column 5 into the interior of the clamping ring 3 .

[0031] As a technical optimization solution of the present invention, the outer wall of the limiting ring 4 is provided with two symmetrically distributed through grooves 16 .

[0032] In this embodiment, two symmetrically distributed through slots 16 are provided on the outer wall of the limiting ring 4 to ensure the normal operation of the push-pull electromagnet 12 .

[0033] As a technical optimization solution of the present invention, a controller 17 located above the well logging electrical component 18 is provided inside the bottom shell 2 .

[0034] In this embodiment, the tension sensor 6 and the push-pull electromagnet 12 are both electrically connected to the controller 17 , making the device operation more convenient.

[0035] The working principle and usage process of the utility model are as follows: the connecting column 5 is inserted into the interior of the bridle tube body 1, so that the connecting column 5 enters the interior of the clamping ring 3, and the clamping block 14 is squeezed by the connecting column 5, so that the clamping block 14 pushes the output end of the push-pull electromagnet 12 into the interior of the sliding groove 13. When the bottom end of the connecting column 5 is flush with the lower end surface of the clamping ring 3, the clamping groove 11 is aligned with the sliding groove 13, and the spring at the output end of the push-pull electromagnet 12 squeezes the clamping block 14, so that the clamping block 14 enters the clamping groove 11, and the connecting column 5 is fixed to the interior of the clamping ring 3;

[0036] When the bridle tube body 1 is stuck in the well, by pulling the cable body 8, the connector 7 pulls the connecting column 5 through the tension sensor 6. When the pulling force exceeds the set value of the tension sensor 6, the tension sensor 6 transmits a signal to the controller 17, and then the push-pull electromagnet 12 is started through the controller 17, so that the output end of the push-pull electromagnet 12 drives the card block 14 into the sliding groove 13, so that the cable body 8 pulls the connecting column 5 out from the inside of the clamping ring 3, preventing the cable from breaking, with high working efficiency and good sealing effect.

[0037] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements 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 releasable well logging bridle structure, comprising a bridle tube (1), a well logging electrical component (18) and a cable body (8), characterized in that: The lower end face of the bridle tube body (1) is threadedly connected to a bottom shell (2), the logging electrical component (18) is mounted on the inner bottom face of the bottom shell (2), the inner wall of the bridle tube body (1) is fixedly connected to a clamping ring (3), the inner wall of the clamping ring (3) is provided with two symmetrically distributed sliding grooves (13), the interiors of the two sliding grooves (13) are both slidably connected to clamping blocks (14), the interior of the clamping ring (3) is embedded with two symmetrically distributed push-pull electromagnets (12), the output ends of the two push-pull electromagnets (12) are fixedly connected to the two clamping blocks (14) respectively; The internal movable connection of the clamping ring (3) is provided with a connecting column (5), the upper end surface of the connecting column (5) is provided with a tension sensor (6), the cable body (8) is fixedly connected to the upper end surface of the tension sensor (6) through a connector (7), the outer wall of the connecting column (5) is provided with two clamping grooves (11) matching the clamping block (14), and the outer wall of the connecting column (5) is fixedly connected to two symmetrically distributed limit blocks (10).

2. A releasable well logging bridle structure according to claim 1, characterized in that: The inner wall of the bridle tube body (1) is fixedly connected to a limiting ring (4) located above the clamping ring (3), and the inner wall of the limiting ring (4) is provided with two limiting grooves (9) matching the limiting blocks (10).

3. The releasable well logging bridle structure according to claim 1, characterized in that: The lower end surface of the clamping ring (3) is fixedly connected to a sealing bottom plate (15), and a sealing ring (19) is provided between the bridle tube body (1) and the bottom shell (2).

4. The releasable well logging bridle structure according to claim 1, characterized in that: The opposite ends of the two clamping blocks (14) are both arranged as inclined surfaces.

5. The releasable well logging bridle structure according to claim 2, characterized in that: The outer wall of the limiting ring (4) is provided with two symmetrically distributed through grooves (16).

6. The releasable well logging bridle structure according to claim 1, characterized in that: A controller (17) located above the well logging electrical component (18) is provided inside the bottom shell (2).

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