Jarring device structure

Abstract

The utility model discloses a jar structure. An elastic piece is arranged between a core shaft and an upper cylinder body; the clamping jaws are hinged to the clamping seats, and compression springs are further arranged between the clamping jaws and the clamping seats; the clamping jaw is connected with the mandrel, and a step part is arranged at the top of the clamping jaw; the clamping jaws penetrate through the limiting grooves and then are clamped with the groove walls of the movable grooves through the step parts, and inclined parts are arranged on the sides, close to the limiting grooves, of the clamping jaws; an impact block is further arranged on the side, close to the lower cylinder body, of the pull cylinder, and one side of the impact block is movably connected into the impact groove. An elastic piece and a compression spring are used as key components of the pressure storage mechanism and the release mechanism, and the elastic piece and the spring can provide enough elasticity and feedback force to generate the jarring effect. Besides, a clamping jaw and clamping seat structure is designed, flexible and reliable operation of the releasing mechanism is achieved by means of interaction of a limiting groove and a movable groove, meanwhile, automatic reset can be achieved through the design of the clamping jaw, and next traction and drill bit impacting can be conveniently and directly conducted.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil drilling, in particular to a jar structure. Background Art

[0002] As a device used to apply impact force during drilling operations, spring jars are widely used in the fields of oil drilling, geological exploration, etc. Existing spring jars have a common problem during operation, that is, the reset of the spring jar is unstable. Due to some limitations in the existing structural design, such as the untimely reset of the release mechanism and the uneven force on the connecting parts, the reset of the spring jar is unstable during operation, which affects the transmission efficiency of the impact force and may even affect the working effect and safety of the entire working device.

[0003] The problem of unstable resetting of spring jars is mainly manifested in: during the operation, the release mechanism cannot complete the resetting operation in a timely and accurate manner, resulting in the device being unable to release the impact force or traction force in the expected manner; due to uneven force or unreasonable design, the connecting parts are prone to displacement or misalignment during the operation, resulting in reduced work efficiency and even damage or safety hazards.

[0004] The patent with publication number CN106194091A discloses an externally adjustable spring jar, which uses an external adjustment nut to adjust the force required by the jar. When the jar rod is pulled, the disc spring compresses the stored energy, and an instantaneous upward jarring force is generated when the slip and the connecting rod are disengaged; when jarring downward, the slip and the connecting rod reconnect and continue to jar upward. During the jarring process, how the binding force between the slip and the connecting rod is designed and controlled is also a key factor. If the binding force is insufficient or the binding method is not firm, the reset of the jar may be unstable, making it impossible to accurately control the release of the jarring force, or even causing the jarring force to be uneven or out of control. Utility Model Content

[0005] The purpose of the utility model is to provide a jar structure to solve the following technical problems raised in the background technology:

[0006] The existing spring jar has the problem of unstable resetting.

[0007] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0008] A jar structure, comprising an upper assembly, a lower assembly, a pressure storage mechanism and a release mechanism; the upper assembly and the lower assembly are connected via the release mechanism; the pressure storage mechanism is arranged in the upper assembly; the upper assembly comprises an upper cylinder, an upper joint, a connecting cylinder and a pull cylinder; the lower assembly comprises a lower cylinder and a lower joint; the pressure storage mechanism comprises an elastic member and a core shaft, and the release mechanism comprises a clamping claw and a clamping seat;

[0009] The upper joint and the connecting cylinder are connected to the two sides of the upper cylinder respectively; the pull cylinder is fixedly connected to the connecting cylinder, and a limiting groove is provided on one side of the pull cylinder; the lower joint is connected to one side of the lower cylinder, and a movable groove is provided on one side of the lower cylinder, and an impact groove is provided on the other side of the lower cylinder; the mandrel is movably connected in the upper cylinder, the elastic member is provided between the mandrel and the upper cylinder, and the two ends of the elastic member are respectively connected to the mandrel and the upper cylinder; the clamping seat is connected to the mandrel;

[0010] The claw is hinged to the seat, and a compression spring is provided between the claw and the seat; the claw is fixed to the core shaft, and a step portion is provided on the top of the claw; after the claw passes through the limiting groove, it is clamped with the groove wall of the movable groove through the step portion, and an inclined portion is provided on the side of the claw close to the limiting groove; an impact block is also provided on the side of the pull cylinder close to the lower cylinder, and one side of the impact block is movably connected in the impact groove.

[0011] Furthermore, the upper joint is threadedly connected to the upper cylinder, and the lower joint is threadedly connected to the lower cylinder.

[0012] Furthermore, a retaining ring is fixedly connected to one side of the core shaft, an adjusting ring is connected inside the connecting cylinder, the elastic member is located between the upper cylinder and the core shaft, and the elastic member is located between the retaining ring and the adjusting ring.

[0013] Furthermore, the connecting cylinder is threadedly connected to the upper cylinder, and the pulling cylinder is threadedly connected to the connecting cylinder.

[0014] Furthermore, a protective tube is provided between the connecting tube and the pulling tube.

[0015] Furthermore, a contact spring is provided between the pull tube and the lower joint, and the contact spring is connected to the lower joint.

[0016] Furthermore, the holder is threadedly connected to the core shaft.

[0017] Furthermore, the clamping seat and the clamping claw are arranged in the pull cylinder, and one side of the clamping claw passes through the limiting groove on the pull cylinder.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] The utility model uses elastic parts and compression springs as key components of the pressure storage mechanism and the release mechanism, because the elastic parts and springs can provide sufficient elasticity and feedback force to produce the shock effect. In addition, the claw and the seat structure are designed, and the flexible and reliable operation of the release mechanism is achieved by the interaction of the limit groove and the movable groove. At the same time, the design of the claw can achieve automatic reset, which is convenient for the next traction and impact on the drill bit. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 for Figure 1 A magnified schematic diagram of part A;

[0022] Figure 3 It is a schematic diagram of the internal structure of the utility model;

[0023] Figure 4 This is a schematic diagram of the claw structure of the utility model;

[0024] Figure 5 This is a schematic diagram of the connecting tube structure of the utility model;

[0025] Figure 6 It is a schematic diagram of the pull tube structure of the utility model.

[0026] Markings in the figure: 1-upper joint, 2-upper cylinder, 3-connecting cylinder, 4-protective cylinder, 5-pull cylinder, 6-movable groove, 7-impact block, 8-lower cylinder, 9-lower joint, 10-limiting groove, 11-claw, 12-retaining ring, 13-elastic member, 14-core shaft, 15-adjusting ring, 16-seat, 17-compression spring, 18-contact spring, 19-step portion, 20-inclined portion, 21 impact groove. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Example

[0029] A jar structure, such as Figures 1 to 6As shown, it includes an upper component, a lower component, a pressure storage mechanism and a release mechanism; the upper component and the lower component are connected through the release mechanism; the pressure storage mechanism is arranged in the upper component; the upper component includes an upper cylinder 2, an upper joint 1, a connecting cylinder 3 and a pulling cylinder 5; the lower component includes a lower cylinder 8 and a lower joint 9; the pressure storage mechanism includes an elastic member 13 and a core shaft 14, and the release mechanism includes a claw 11 and a seat 16; in this embodiment, the elastic member 13 adopts a disc spring.

[0030] like Figure 1 or Figure 3 As shown, the upper joint 1 and the connecting cylinder 3 are respectively connected to the two sides of the upper cylinder 2; the pull cylinder 5 is fixedly connected to the connecting cylinder 3, and a limiting groove 10 is provided on one side of the pull cylinder 5; the lower joint 9 is connected to one side of the lower cylinder 8, and a movable groove 6 is provided on one side of the lower cylinder 8, and an impact groove is provided on the other side of the lower cylinder 8; the core shaft 14 is movably connected in the upper cylinder 2, and the elastic member 13 is provided between the core shaft 14 and the upper cylinder 2, and the two ends of the elastic member 13 are respectively connected to the core shaft 14 and the upper cylinder 2; the clamping seat is connected to the core shaft;

[0031] like Figure 3 As shown, the claw 11 is hinged with the seat 16, and a compression spring 17 is provided between the claw 11 and the seat 16; the claw 11 is fixedly connected to the mandrel 14, and a step portion 19 is provided on the top of the claw 11; after the claw 11 passes through the limiting groove 10, it is clamped with the groove wall of the movable groove 6 through the step portion 19, as shown in FIG. Figure 4 As shown, an inclined portion 20 is provided on one side of the clamping claw 11 close to the limiting groove 10 ; an impact block 7 is also provided on one side of the pull cylinder 5 close to the lower cylinder 8 , and one side of the impact block 7 is movably connected in the impact groove 21 .

[0032] Specifically, when in use, the upper joint 1 is connected to the weighting rod, the weighting rod is pulled by the steel wire to apply traction, and the lower joint 9 is connected to the drill bit that needs to be jarred. The upper joint 1 and the lower joint 9 can be connected to the weighting rod and the drill bit respectively by threaded connection. When in use, the traction force is applied by the steel wire, and the traction force acts on the upper cylinder 2, and the upper cylinder 2 transmits the traction force to the pull tube 5 through the connecting tube 3. Since the lower cylinder 8 is clamped with the claw 11 through the groove wall of the movable groove 6, the claw 11, the seat 16, and the mandrel 14 will clamp the lower cylinder 8 and remain motionless in the process of pulling the jar. The upper cylinder 2 moves upward under the traction force and drives the pull tube 5 to move upward, and a relative displacement occurs between the mandrel 14 and the upper cylinder 2, and a relative displacement occurs between the pull tube 5 and the claw 11. In this process, the elastic member 13 between the upper cylinder 2 and the mandrel 14 is compressed, and a cavity is generated between the mandrel 14 and the upper joint 1. At the same time, the pull tube 5 will move upward. Since the claw 11 passes through the limiting groove 10 on the pull cylinder 5, during the movement of the pull cylinder 5, the groove wall of the limiting groove 10 on the claw 11 will contact the inclined portion 20 on the claw 11, and compress the claw 11 to gradually separate from the lower cylinder 8. When the stepped portion 19 on the claw 11 separates from the groove wall of the movable groove 6 on the lower cylinder 8, the lower cylinder 8 and the core shaft 14 are no longer restricted, and the elastic member 13 is released. The elastic member 13 resets and pushes the core shaft 14 to move toward the direction of the cavity and hit the cavity wall of the upper joint 1. After the upper joint 1 is subjected to force, it drives the upper cylinder 2, the connecting cylinder 3 and the pull cylinder 5 to jump upward. The pull cylinder 5 moves upward and drives the impact block 7 to hit the groove wall of the impact groove 21, thereby generating a shock force on the lower cylinder 8. Then the claw 11 and the pull tube 5 fall together under the action of gravity. When the claw 11 moves to the position of the movable groove 6, the compression spring 17 drives the claw 11 to reset and makes the step 19 on the claw 11 stuck on the groove wall of the movable groove 6. When the claw 11 and the pull tube 5 cannot fall, the upper cylinder 2 can be pushed down by an external object such as a push rod. It should be noted here that gravity can generally ensure that the claw 11 and the pull tube 5 are reset smoothly, but when the external friction force increases, such as more sand in the mortar, it is necessary to use an external object, such as a push rod, to help the claw 11 and the pull tube 5 reset, thereby driving the claw 11 and the pull tube 5 to move downward. Since one side of the impact block 7 is always located in the impact groove 21, there will be no relative rotation between the pull tube 5 and the lower cylinder 8 to ensure that the claw 11 enters the limit groove 10. Then the next traction and impact drill bit can be carried out. It should be noted that the top width of the claw 11 is greater than the inner diameter of the pull tube 5 and smaller than the outer diameter of the pull tube 5 to ensure that the claw 11 does not escape from the limiting groove 10. The elastic member 13 and the compression spring 17 are used as key components of the pressure storage mechanism and the release mechanism. The pressure release of the elastic member 13 can produce a strong shock effect; the compression spring 17 ensures that the claw 11 is smoothly reset (enters the limiting groove 10).In addition, the structure of the claw 11 and the holder 16 is designed, and the flexible and reliable operation of the release mechanism is achieved by means of the interaction between the limit groove 10 and the movable groove 6. At the same time, the design of the claw 11 can achieve automatic resetting, which is convenient for the next direct traction and impact on the drill bit.

[0033] In a preferred embodiment, the upper joint 1 is threadedly connected to the upper cylinder 2, and the lower joint 9 is threadedly connected to the lower cylinder 8. This design effectively ensures a firm connection between the upper and lower joints 9 and the upper and lower cylinders 8, and improves the stability and safety of the overall device.

[0034] In a preferred embodiment, a retaining ring 12 is fixedly connected to one side of the core shaft 14, an adjusting ring 15 is connected to the connecting cylinder 3, and the elastic member 13 is located between the upper cylinder 2 and the core shaft 14, and the elastic member 13 is located between the retaining ring 12 and the adjusting ring 15. This arrangement helps to ensure the balance between stability and flexibility of the elastic member 13 during movement, thereby improving the service life and performance of the entire device.

[0035] In a preferred embodiment, the connecting tube 3 is threadedly connected to the upper cylinder 2, and the pull tube 5 is threadedly connected to the connecting tube 3. The connecting tube 3 and the upper cylinder 2 are threadedly connected to ensure a firm connection between the two. The pull tube 5 and the connecting tube 3 are also threadedly connected to enhance the stability and reliability between the two. This design can effectively improve the overall performance and service life of the device.

[0036] In a preferred embodiment, a protective tube 4 is provided between the connecting tube 3 and the pulling tube 5. The function of the protective tube 4 is to provide additional protection for the connecting tube 3 and the pulling tube 5, effectively reduce the impact of the external environment on the device, especially the connection part between the connecting tube and the pulling tube 5, and improve the durability and stability of the device.

[0037] In a preferred embodiment, a contact spring 18 is provided between the pull cylinder 5 and the lower joint 9, and the contact spring 18 is connected to the lower joint 9. The function of the contact spring 18 is to buffer the impact force of the pull cylinder 5 falling when the device is reset, protect the stability and safety of the device, and at the same time increase the service life of the device.

[0038] In a preferred embodiment, the holder 16 is threadedly connected to the mandrel 14. The holder 16 and the mandrel 14 are threadedly connected to ensure a tight and stable connection between the two, thereby enhancing the overall structural strength and stability of the device.

[0039] In a preferred embodiment, the clamping seat 16 and the claw 11 are arranged in the pull cylinder 5, and one side of the claw 11 passes through the limiting groove 10 on the pull cylinder 5. This design can ensure the effective fixation and cooperation between the clamping seat 16 and the claw 11, and the claw 11 passes through the limiting groove 10 to achieve limiting and prevent the claw 11 from rotating, which can improve the stability and operability of the device.

[0040] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0041] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A jar structure, characterized in that: The invention comprises an upper component, a lower component, a pressure storage mechanism and a release mechanism; the upper component and the lower component are connected via the release mechanism; the pressure storage mechanism is arranged in the upper component; the upper component comprises an upper cylinder (2), an upper joint (1), a connecting cylinder (3) and a pull cylinder (5); the lower component comprises a lower cylinder (8) and a lower joint (9); the pressure storage mechanism comprises an elastic member (13) and a core shaft (14); the release mechanism comprises a clamping claw (11) and a clamping seat (16); The upper joint (1) and the connecting tube (3) are respectively connected to the two sides of the upper cylinder (2); the pull tube (5) is fixedly connected to the connecting tube (3), and a limiting groove (10) is provided on one side of the pull tube (5); the lower joint (9) is connected to one side of the lower cylinder (8), and a movable groove (6) is provided on one side of the lower cylinder (8), and an impact groove (21) is provided on the other side of the lower cylinder (8); the core shaft (14) is movably connected in the upper cylinder (2), and the elastic member (13) is provided between the core shaft (14) and the upper cylinder (2), and the two ends of the elastic member (13) are respectively connected to the core shaft (14) and the upper cylinder (2); the clamping seat (16) is connected to the core shaft (14); The clamping claw (11) is hinged to the clamping seat (16), and a compression spring (17) is also arranged between the clamping claw (11) and the clamping seat (16); the clamping claw (11) is fixedly connected to the core shaft (14), and a stepped portion (19) is arranged on the top of the clamping claw (11); after the clamping claw (11) passes through the limiting groove (10), it is clamped with the groove wall of the movable groove (6) through the stepped portion (19), and an inclined portion (20) is arranged on the side of the clamping claw (11) close to the limiting groove (10); and an impact block (7) is also arranged on the side of the pull cylinder (5) close to the lower cylinder (8), and one side of the impact block (7) is movably connected in the impact groove (21).

2. A jar structure according to claim 1, characterized in that: The upper joint (1) is threadedly connected to the upper cylinder (2), and the lower joint (9) is threadedly connected to the lower cylinder (8).

3. A jar structure according to claim 1, characterized in that: A retaining ring (12) is fixedly connected to one side of the core shaft (14), an adjusting ring (15) is connected inside the connecting cylinder (3), the elastic member (13) is located between the upper cylinder (2) and the core shaft (14), and the elastic member (13) is located between the retaining ring (12) and the adjusting ring (15).

4. A jar structure according to claim 1, characterized in that: The connecting tube (3) is threadedly connected to the upper cylinder (2), and the pulling tube (5) is threadedly connected to the connecting tube (3).

5. A jar structure according to claim 1, characterized in that: A protection tube (4) is arranged between the connecting tube (3) and the pulling tube (5).

6. A jar structure according to claim 1, characterized in that: A contact spring (18) is provided between the pull tube (5) and the lower joint (9), and the contact spring (18) is connected to the lower joint (9).

7. A jar structure according to claim 1, characterized in that: The holder (16) is threadedly connected to the core shaft (14).

8. A jar structure according to claim 1, characterized in that: The clamping seat (16) and the clamping claw (11) are arranged in the pull cylinder (5), and one side of the clamping claw (11) passes through the limiting groove (10) on the pull cylinder (5).

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