Hydraulic oscillator structure

Abstract

The utility model discloses a hydraulic oscillator structure which comprises a vibration part and a power part, a valve structure comprises a movable valve and a fixed valve, the movable valve is rotationally connected in the power part, and an eccentric hole is formed in the fixed valve; the other end of the stator is connected with the stabilizing device; the stabilizing device comprises a stabilizing rod, a stabilizing block, a stabilizing cap and a bearing; wherein the bearing is fixedly connected with the power part, and the stabilizing block is used for pressing the bearing; the stabilizing cap is fixedly connected to one end of the stabilizing rod; one end of the stabilizer bar away from the stabilizer cap is fixedly connected with the stator; one end, close to the stabilizing cap, of the stabilizing rod is rotationally connected with the bearing and the stabilizing block; a middle runner is arranged in the side, close to the stabilizing cap, of the stabilizing rod, and circulating holes are formed in the two sides of the bottom of the middle runner. Through the design of the stabilizing device comprising the bearing, the stabilizing block, the stabilizing cap and the like, the bearing can be effectively pressed, the stability of the rotor is improved, and the possibility that the rotor deflects during high-speed rotation is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of oscillators, in particular to a hydraulic oscillator structure. Background Art

[0002] The development of the petroleum industry has led oilfield drilling projects to move forward in the direction of horizontal wells. During horizontal well drilling, the weight of the drill bit will increase the friction between the drill bit and the wellbore, which may reduce the drilling speed and even cause the drill bit to be unable to transmit power to the drill bit normally. Therefore, reducing friction, reducing the occurrence of drill bit sticking accidents, increasing the dynamic drilling pressure, and improving drilling efficiency have become issues that need to be urgently addressed.

[0003] In the prior art, hydraulic oscillators are usually used to reduce friction. Hydraulic oscillators are devices that use water flow and pressure changes to generate oscillating motion. Its basic working principle is to change the speed and direction of the water flow so that the water flow produces periodic unstable flow inside the pipe or device, and under the action of fluid dynamics, oscillating motion is generated. The hydraulic oscillator used in the drilling field drives the internal rotor to rotate and drives the valve disc to rotate through the drilling fluid, thereby generating periodic pressure changes. However, the rotor connection method in the prior art is relatively simple. During the high-speed rotation of the rotor, the rotor is prone to shaking and contacting the stator, which not only makes the rotor easy to be damaged but also causes irregular pressure changes in the oscillator, affecting the periodic motion of the core shaft.

[0004] A well hydraulic oscillator is disclosed in the patent with publication number CN102704842A. The flow holes of the vibration valve and the fixed valve are interlaced to achieve the change of the flow channel cross section, affect the flow of drilling fluid, modulate the simple harmonic pressure wave, drive the vibration shell to have continuous simple harmonic vibration in the longitudinal direction, and effectively improve the friction resistance between the drill string and the well wall. According to the original text and the attached drawings, it can be obtained that the oscillator of this structure is connected to the vibration valve. The stability of the rotor depends entirely on the vibration valve. Therefore, the rotor will deviate from the axis when rotating at high speed, causing the rotor to contact with the stator and cause damage to the rotor. Utility Model Content

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

[0006] The connection method of the rotor in the prior art is relatively simple. During the high-speed rotation of the rotor, the rotor is prone to shake and contact with the stator.

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

[0008] A hydraulic oscillator structure comprises a vibration part and a power part, the vibration part and the power part are connected and communicated with each other, a stator, a rotor and a valve mechanism are arranged in the power part, an elastic member is arranged in the vibration part, the valve structure comprises a movable valve and a fixed valve, the movable valve is rotatably connected in the power part, and an eccentric hole is arranged on the fixed valve; one end of the stator is connected to the movable valve through a coupling, and the other end is connected to a stabilizing device;

[0009] The stabilizing device includes a stabilizing rod, a stabilizing block, a stabilizing cap and a bearing; wherein the bearing is fixedly connected to the power unit, and the stabilizing block is used to press the bearing; the stabilizing cap is fixedly connected to one end of the stabilizing rod, and the stabilizing cap is rotatably connected to the stabilizing block;

[0010] The end of the stabilizing rod away from the stabilizing cap is fixedly connected to the stator; the end of the stabilizing rod close to the stabilizing cap is rotatably connected to the bearing and the stabilizing block; an intermediate flow channel is arranged inside the side of the stabilizing rod close to the stabilizing cap, and flow holes are arranged on both sides of the bottom of the intermediate flow channel.

[0011] Furthermore, the vibration part includes a core shaft, a key body and a vibration cylinder; the core shaft is key-connected to the key body; the vibration cylinder is connected to the key body; the elastic member is arranged between the vibration cylinder and the core shaft, one end of the elastic member is connected to the vibration cylinder, and the other end is connected to the core shaft.

[0012] Furthermore, a sealing joint is arranged outside the core shaft, and an adjusting ring is fixed inside the vibration cylinder; one end of the elastic member is connected to the sealing joint, and the other end is connected to the adjusting ring.

[0013] Furthermore, one end of the vibration cylinder is connected to a joint, a piston is movably connected in the mounting joint, a limit joint is also connected between the movable and core shaft, one end of the limit joint is connected to the core shaft, and the other end is connected to the piston.

[0014] Furthermore, a sealing ring is provided between the piston and the mounting joint.

[0015] Furthermore, the power unit includes a power cylinder, a matching joint, a valve joint and an end joint; the matching joint and the valve joint are respectively connected to the two ends of the power cylinder, and the end joint is connected to one end of the valve joint; the stator is fixed in the power cylinder, and the stator valve is fixed in the valve joint.

[0016] Furthermore, the flow hole is an inclined structure.

[0017] Furthermore, the bearing adopts a thrust roller bearing.

[0018] Furthermore, an intermediate joint is provided between the vibration part and the power part, one end of the intermediate joint is connected to the vibration part, and the other end is connected to the power part.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] The utility model can effectively press the bearings, improve the stability of the rotor, and reduce the possibility of the rotor being deflected when rotating at high speed through the design of the stabilizing device, including bearings, stabilizing blocks, stabilizing caps, etc. The intermediate flow channel and the flow hole in the stabilizing device are designed so that the radial force generated by the drilling fluid on the stabilizing rod and the rotor when passing through the stabilizing rod and the rotor is small, thereby ensuring the stability of the stabilizing rod and the rotor. By improving the stability of the rotor, the working stability of the hydraulic oscillator at high speed rotation can be ensured, the collision between the rotor and the stator can be reduced, and the service life of the hydraulic oscillator can be extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 It is a structural schematic diagram of the vibration part of the utility model;

[0023] Figure 3 It is a structural schematic diagram of the power unit of the utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the stabilizing device of the utility model;

[0025] Figure 5 A schematic diagram of the connection structure between the movable valve and the fixed valve of the utility model.

[0026] Markings in the figure: 1-vibration part, 2-power part, 3-middle joint, 4-core shaft, 5-key body, 6-vibration cylinder, 7-elastic part, 8-adjusting ring, 9-installation joint, 10-piston, 11-sealing ring, 12-limit joint, 13-sealing joint, 14-matching joint, 15-stabilizing block, 16-stabilizing rod, 17-stator, 18-rotor, 19-coupling, 20-moving valve, 21-fixed valve, 22-end joint, 23-valve joint, 24-power cylinder, 25-bearing, 26-stabilizing cap, 27-middle flow channel, 28-flow hole, 29-eccentric hole. 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. Example

[0028] A hydraulic oscillator structure, such as Figure 1As shown, it includes a vibration part 1 and a power part 2, the vibration part 1 and the power part 2 are connected and communicated with each other, a stator 17, a rotor 18 and a valve mechanism are arranged in the power part 2, an elastic member 7 is arranged in the vibration part 1, and the valve structure includes a movable valve 20 and a fixed valve 21, the movable valve 20 is rotatably connected in the power part 2, and an eccentric hole 29 is arranged on the fixed valve 21, one end of the stator 17 is connected to the movable valve 20 through a coupling 19, and the other end is connected to a stabilizing device, as shown in FIG. Figure 4 As shown; it should be noted that flow channels are provided in both the power unit 2 and the vibration unit 1. For details, reference may be made to the hydraulic oscillator structure in the prior art, wherein the rotor 18 can rotate when the drilling fluid flows through. The rotor 18 drives the actuator 20 to rotate so that the flow diameter of the eccentric hole 29 on the fixed valve 21 changes periodically. When the flow diameter of the eccentric hole 29 changes periodically, the internal pressure of the hydraulic oscillator changes periodically. Since an elastic member 7 is provided in the power unit 2, the vibration unit 1 can vibrate in the axial direction. For details about the vibration principle of the hydraulic oscillator, reference may be made to the hydraulic oscillator in the prior art, which will not be described one by one here. In this embodiment, the elastic member 7 adopts a disc spring.

[0029] The stabilizing device includes a stabilizing rod 16, a stabilizing block 15, a stabilizing cap 26 and a bearing 25; wherein the bearing 25 is fixedly connected to the power unit 2, and the stabilizing block 15 is used to press the bearing 25; the stabilizing cap 26 is fixedly connected to one end of the stabilizing rod 16, and the stabilizing cap 26 is rotatably connected to the stabilizing block 15; a ball is arranged between the stabilizing cap 26 and the stabilizing block 15, and the rotational connection is achieved through the ball.

[0030] One end of the stabilizing rod 16 away from the stabilizing cap 26 is fixedly connected to the stator 17; the end of the stabilizing rod 16 close to the stabilizing cap 26 is rotatably connected to the bearing 25 and the stabilizing block 15; an intermediate flow channel 27 is provided inside the side of the stabilizing rod 16 close to the stabilizing cap 26, and flow holes 28 are provided on both sides of the bottom of the intermediate flow channel 27.

[0031] Specifically, when in use, the drilling fluid enters through the vibration part 1 and then flows into the power part 2, and drives the rotor 18 to rotate when the drilling fluid flows through the rotor 18. Since one end of the rotor 18 is connected to the movable valve 20 and the other end is connected to the stabilizing device, the rotor 18 is not easy to deflect during the rotation. In the stabilizing device, the bearing 25 can ensure the stable rotation of the rotor 18. The stabilizing plate is used to press the bearing 25 to improve the stability of the bearing 25, that is, to ensure the stability of the rotor 18. The design of the stabilizing cap 26 makes it difficult for the rotor 18 to change its position in the axial direction during the rotation, further improving the stability of the rotor 18. At the same time, an intermediate flow channel 27 and a flow hole 28 are provided on the stabilizing rod 16. In order for the drilling fluid to drive the rotor 18 to rotate, it needs to pass through the intermediate flow channel 27 and the flow hole 28 in sequence, so that the radial force generated by the drilling fluid on the stabilizing rod 16 and the rotor 18 is small, thereby ensuring the stability of the stabilizing rod 16 and the rotor 18. This design makes it difficult for the rotor 18 to deflect and hit the stator 17 when rotating at high speed, thereby ensuring the working stability of the rotor 18, that is, ensuring the overall stability of the hydraulic oscillator.

[0032] In a preferred embodiment, if Figure 2 As shown, the vibration part 1 includes a core shaft 4, a key body 5 and a vibration cylinder 6; the core shaft 4 is key-connected with the key body 5; the vibration cylinder 6 is connected with the key body 5; the elastic member 7 is arranged between the vibration cylinder 6 and the core shaft 4, one end of the elastic member 7 is connected to the vibration cylinder 6, and the other end is connected to the core shaft 4. Further optimized, a sealing joint 13 is arranged outside the core shaft 4, and an adjustment ring 8 is fixed inside the vibration cylinder 6; one end of the elastic member 7 is connected to the sealing joint 13, and the other end is connected to the adjustment ring 8. The design of the core shaft 4 and the key body 5 ensures the stability of the movement of the core shaft 4 in the axial direction, so that vibration can be generated stably. The design of the adjustment ring 8 is to facilitate the control of the tightness of the elastic member 7 by increasing or decreasing the number of adjustment rings 8, thereby realizing adjustable vibration performance.

[0033] In a preferred embodiment, one end of the vibration cylinder 6 is connected to a joint, a piston 10 is movably connected in the mounting joint 9, and a limit joint 12 is also connected between the movable and the core shaft 4, one end of the limit joint 12 is connected to the core shaft 4, and the other end is connected to the piston 10. The movable is used to improve the sensitivity of the core shaft 4 to pressure, and the contact area between the piston 10 and the drilling fluid is large. When the water pressure in the hydraulic vibrator changes, the piston 10 will move and drive the core shaft 4 to move through the limit joint 12, the core shaft 4 moves to compress the elastic member 7, and the elastic member 7 drives the core shaft 4 to reset, thereby generating vibration.

[0034] In a preferred embodiment, a sealing ring 11 is provided between the piston 10 and the mounting joint 9. The sealing ring 11 ensures the sealing between the piston 10 and the mounting joint 9, and prevents the drilling fluid from entering the gap between the core shaft 4 and the vibration cylinder 6 through the gap between the piston 10 and the mounting joint 9.

[0035] In a preferred embodiment, if Figure 3 As shown, the power unit 2 includes a power cylinder 24, a matching joint 14, a valve joint 23 and an end joint 22; the matching joint 14 and the valve joint 23 are respectively connected to the two ends of the power cylinder 24, and the end joint 22 is connected to one end of the valve joint 23; the stator 17 is fixed in the power cylinder 24, and the fixed valve 21 is fixed in the valve joint 23. The design of the power cylinder 24 is to facilitate the installation and fixing of the stator 17, the design of the valve joint 23 is to facilitate the installation of the fixed valve 21, and the design of the end joint 22 is to facilitate the connection of the hydraulic oscillator with the outside world.

[0036] In a preferred embodiment, the flow hole 28 is an inclined structure. The design of the flow hole 28 is to facilitate the drilling fluid to flow out of the middle flow channel 27, and to easily enter the flow channel in the power cylinder 24 when flowing out.

[0037] In a preferred embodiment, the bearing 25 is a thrust roller bearing 25. The thrust roller bearing 25 uses rolling friction, which has a smaller friction loss than sliding friction, and can reduce energy consumption. At the same time, the thrust roller bearing 25 uses rolling friction, which has a lower friction coefficient than sliding friction, and can therefore withstand a higher rotation speed. That is, the stable rotation of the rotor 18 is ensured.

[0038] In a preferred embodiment, an intermediate joint 3 is provided between the vibration part 1 and the power part 2, one end of the intermediate joint 3 is connected to the vibration part 1, and the other end is connected to the power part 2. The vibration part 1 and the power part 2 are connected by the intermediate joint so that the vibration part 1 and the power part 2 can be separated, realizing a modular design, which is conducive to the maintenance, replacement and upgrade of the product.

[0039] 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.

[0040] 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.

[0041] Although the embodiments of the present invention have been shown and described, it will be understood 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 the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydraulic oscillator structure, comprising a vibration part (1) and a power part (2), wherein the vibration part (1) and the power part (2) are connected and communicated with each other, a stator (17), a rotor (18) and a valve mechanism are arranged in the power part (2), and an elastic member (7) is arranged in the vibration part (1), characterized in that: The valve structure comprises a movable valve (20) and a fixed valve (21), wherein the movable valve (20) is rotatably connected in the power unit (2), and an eccentric hole (29) is provided on the fixed valve (21); one end of the stator (17) is connected to the movable valve (20) through a coupling (19), and the other end is connected to a stabilizing device; The stabilizing device comprises a stabilizing rod (16), a stabilizing block (15), a stabilizing cap (26) and a bearing (25); wherein the bearing (25) is fixedly connected to the power unit (2), and the stabilizing block (15) is used to press the bearing (25); the stabilizing cap (26) is fixedly connected to one end of the stabilizing rod (16), and the stabilizing cap (26) is rotatably connected to the stabilizing block (15); One end of the stabilizing rod (16) away from the stabilizing cap (26) is fixedly connected to the stator (17); one end of the stabilizing rod (16) close to the stabilizing cap (26) is rotatably connected to the bearing (25) and the stabilizing block (15); an intermediate flow channel (27) is provided inside the side of the stabilizing rod (16) close to the stabilizing cap (26), and flow holes (28) are provided on both sides of the bottom of the intermediate flow channel (27).

2. A hydraulic oscillator structure according to claim 1, characterized in that: The vibration part (1) comprises a core shaft (4), a key body (5) and a vibration cylinder (6); the core shaft (4) is key-connected to the key body (5); the vibration cylinder (6) is connected to the key body (5); an elastic member (7) is arranged between the vibration cylinder (6) and the core shaft (4); one end of the elastic member (7) is connected to the vibration cylinder (6), and the other end is connected to the core shaft (4).

3. A hydraulic oscillator structure according to claim 2, characterized in that: A sealing joint (13) is arranged outside the core shaft (4), and an adjusting ring (8) is fixed inside the vibration cylinder (6); one end of the elastic member (7) is connected to the sealing joint (13), and the other end is connected to the adjusting ring (8).

4. A hydraulic oscillator structure according to claim 2, characterized in that: One end of the vibration cylinder (6) is connected to a joint, a piston (10) is movably connected inside the mounting joint (9), a limit joint (12) is also connected between the movable part and the core shaft (4), one end of the limit joint (12) is connected to the core shaft (4), and the other end is connected to the piston (10).

5. A hydraulic oscillator structure according to claim 1, characterized in that: A sealing ring (11) is provided between the piston (10) and the mounting joint (9).

6. A hydraulic oscillator structure according to claim 1, characterized in that: The power unit (2) comprises a power cylinder (24), a matching joint (14), a valve joint (23) and an end joint (22); the matching joint (14) and the valve joint (23) are respectively connected to two ends of the power cylinder (24), and the end joint (22) is connected to one end of the valve joint (23); the stator (17) is fixedly connected in the power cylinder (24), and the stator valve (21) is fixedly connected in the valve joint (23).

7. A hydraulic oscillator structure according to claim 1, characterized in that: The flow hole (28) is an inclined structure.

8. A hydraulic oscillator structure according to claim 1, characterized in that: The bearing (25) adopts a thrust roller bearing (25).

9. A hydraulic oscillator structure according to claim 1, characterized in that: An intermediate joint (3) is provided between the vibration part (1) and the power part (2); one end of the intermediate joint (3) is connected to the vibration part (1), and the other end is connected to the power part (2).

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