Transverse hydraulic oscillator

Abstract

The utility model discloses a transverse hydraulic oscillator, and relates to the field of drilling tools, the transverse hydraulic oscillator comprises a shell, a driving part and an oscillating part are coaxially arranged in the shell, the driving part and the oscillating part are connected through a spline shaft, the driving part comprises a turbine shaft, a plurality of turbine stators and turbine rotors are distributed on the turbine shaft in the axial direction, and the oscillating part is composed of an eccentric shaft; a plurality of mounting supports are arranged in the shell, the two ends of the eccentric shaft and the two ends of the turbine shaft are rotationally connected to the mounting supports, and a plurality of through holes allowing liquid to flow axially are formed in the mounting supports at equal intervals in the circumferential direction of the mounting supports. The transverse dynamic adjusting capacity of the drill column is improved, and radial vibration caused by the irregular well wall and the heterogeneity of the stratum is effectively restrained; the shell is arranged to be of a split type structure, the shell can be assembled, disassembled and combined at will under the action of the double male connectors, and the adaptability of the length of the oscillator to the well depth is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of drilling tools, in particular to a transverse hydraulic oscillator. BACKGROUND

[0002] For directional wells and horizontal wells, the problem of high friction is more prominent, which can cause the wellbore to bend and greatly reduce the ability of the drilling rig to drill to the maximum depth, and even have a negative impact on oil production. To solve this industry problem, hydraulic oscillators have emerged. Hydraulic oscillator is a device that uses hydraulic pulse to generate drill string oscillation. By converting the hydraulic energy of the drilling fluid into mechanical energy to generate oscillation of the drill string, the static friction between the drill string and the wellbore is reduced, and the drilling pressure transmission is improved. Foreign countries started early in the research and application of hydraulic oscillation drag reduction tools, and the technology has been quite mature, becoming a commonly used drilling drag reduction tool abroad. For example, in the development of Eagle Ford shale gas in the United States, the mechanical drilling speed of multiple wells increased by 20%-50% after applying the hydraulic oscillation drag reduction tool, and the drilling cycle was shortened by 10%-30%. In China, with the exploration and development of oil and gas resources to complex and deep formations, the demand for efficient drilling technology is increasingly urgent, and hydraulic oscillators have gradually been valued and applied.

[0003] With the exploration and development of oil and gas resources to deep and complex formations, the well trajectory becomes more complex, and the downhole working conditions become more severe. In actual operation, the drill string not only bears axial load, but also faces challenges of transverse and radial vibration caused by irregular well wall and formation heterogeneity. Although the axial structure of the hydraulic oscillator has achieved remarkable results in axial drag reduction, it is difficult to meet the demand for radial dynamic adjustment downhole. Therefore, there is an urgent need for a transverse hydraulic oscillator. At the same time, it is also necessary to solve the stability of the driving part and the oscillation part during transverse oscillation, as well as the axial flow of water. CONTENT OF THE INVENTION

[0004] The device provides a transverse hydraulic oscillator, and the specific implementation is as follows:

[0005] The shell;

[0006] The driving part and the oscillation part are coaxially arranged inside the shell and are connected through a spline shaft;

[0007] The driving part includes a turbine shaft, and the turbine shaft is arranged with a plurality of turbine stators and turbine rotors in the axial direction. The liquid flowing through the turbine rotors drives the turbine shaft to rotate;

[0008] The oscillation part is composed of an eccentric shaft, and the shell is built-in with a plurality of mounting supports. The two ends of the eccentric shaft and the turbine shaft are rotatably connected to the mounting supports. The mounting supports are equidistantly provided with a plurality of through holes for axial flow of liquid along the circumferential direction. The axial flow of liquid simultaneously causes the turbine shaft to drive the eccentric shaft to oscillate transversely.

[0009] Based on the above technical scheme, by setting the eccentric shaft driven by the driving part, the eccentric shaft acts on the lower shell to produce lateral oscillation, which improves the lateral dynamic adjustment capability of the drill string, effectively suppresses the radial vibration caused by irregular well wall and formation heterogeneity; enhances the stability of the drilling tool, reduces the risk of collision and wear between the drill string and the well wall; at the same time, the hydraulic circulation path is optimized, the axial hydraulic efficient flow is guaranteed, and more reliable technical support is provided for deep complex formation drilling operation.

[0010] Preferably, the shell is a split structure, which is composed of a lower shell and an upper shell, and the connection is connected by a double male joint.

[0011] Preferably, the upper shell is axially connected with an upper joint, and the lower shell is axially connected with a lower joint.

[0012] Based on the above technical scheme, in view of the problems of large well depth difference and variable operation environment under deep complex well conditions, the traditional integrated hydraulic oscillator is difficult to flexibly adapt to different well depth requirements due to fixed size, and a split shell design is adopted, which realizes the rapid disassembly and free combination of the shell through the double male joint connection. This modular structure breaks through the size limitation of the traditional oscillator, and the operation personnel can flexibly adjust the shell splicing node according to the actual well depth and working condition requirements, so that the length of the oscillator can accurately match different drilling depths, and the adaptability of the equipment to complex well conditions is greatly improved.

[0013] Preferably, the turbine rotor is sleeved on the inside of the turbine stator, and the turbine stator is positioned in the upper shell by a nut.

[0014] The turbine rotor is provided with second blades in the circumferential direction, the turbine stator is provided with first blades in the circumferential direction, and the inclination directions of the second blades and the first blades are the same.

[0015] Based on the above technical scheme, when the high-pressure drilling fluid flows through the driving part, the strong fluid power acts on the turbine rotor to drive the turbine shaft to rotate at high speed. The rotating motion is converted into the oscillation power of the oscillator by the eccentric shaft; the second blades and the first blades adopt the same direction inclination layout, which effectively enhances the consistency of the fluid driving force, not only improves the rotation efficiency of the turbine rotor system, but also ensures the stability of the oscillation force output, so that the oscillator can still maintain high efficiency and reliable working state in complex downhole conditions.

[0016] Preferably, bearing sleeves are arranged between the two ends of the eccentric shaft and the mounting support, and a taper sleeve is arranged on the outside of the mounting support.

[0017] Preferably, bearing sleeves are arranged between the two ends of the turbine shaft and the mounting support, and a taper sleeve is arranged on the outside of the mounting support.

[0018] Based on the above technical scheme, the inner side caliber of the cone sleeve is larger than the outer side caliber, the cone sleeve can effectively position the installation position of the installation support, and simultaneously has the effect of converging flow on the water passing through the installation support.

[0019] Preferably, one end of the turbine shaft and one end of the eccentric shaft are provided with splines engaged with the spline shaft.

[0020] In summary, the present application has the following beneficial technical effects:

[0021] 1. In the utility model, the eccentric shaft driven by the driving part acts on the lower shell to produce transverse oscillation, which improves the transverse dynamic adjustment capacity of the drill string and effectively suppresses the radial vibration caused by irregular well wall and non-homogeneous stratum.

[0022] 2. The utility model has a simple structure, the shell is provided in a split structure, and under the action of the double male joint, the shell can be disassembled and assembled at will, which improves the adaptability of the length of the oscillator to the well depth.

[0023] 3. The utility model is provided with a turbine rotor driven by water power, so that the turbine shaft rotates, and the oscillation force of the oscillator is converted, and the installation support improves the stability of the driving part and the oscillation part, and the through hole also enables the water power to flow stably. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is the explosion structure schematic view of the utility model;

[0025] Figure 2 is the explosion structure schematic view of the shell part in the utility model;

[0026] Figure 3 is the explosion structure schematic view of the shaft part in the utility model;

[0027] Figure 4 is the cross-sectional view of the shaft part structure in the utility model;

[0028] Figure 5 is the cross-sectional view of the oscillation section structure in the utility model;

[0029] Figure 6 is the structure schematic view of the oscillation section in the utility model;

[0030] Figure 7 is the cross-sectional view of the driving part structure in the utility model;

[0031] Figure 8 is the explosion structure schematic view of the driving part in the utility model.

[0032] EXPLANATION OF REFERENCE NUMBERS:

[0033] 1. Upper connector, 2. Upper housing, 3. Nut, 4. Double male connector, 5. Splined shaft, 6. Spline, 7. Lower housing, 8. Mounting support, 9. Eccentric shaft, 10. Drive unit, 11. Bearing sleeve, 12. Lower connector, 13. Tapered sleeve

[0034] 801, through hole; 1001, turbine shaft; 1002, turbine rotor; 1003, turbine stator; 1004, first blade; 1005, second blade. Detailed Implementation

[0035] The specific embodiments of this utility model are described below with reference to the accompanying drawings and examples:

[0036] It should be noted that the structures, proportions, sizes, etc. shown in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which the present invention can be implemented. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0037] Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in this specification are only for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered as within the scope of implementation of this utility model.

[0038] The following is in conjunction with the appendix Figures 1-8 This application will be described in further detail.

[0039] This application discloses a transverse hydraulic oscillator.

[0040] Reference Figures 1-8 This embodiment discloses a transverse hydraulic oscillator, including a housing. Inside the housing, a drive unit 10 and an oscillation unit are coaxially arranged and connected by a splined shaft 5. In this structure, the drive unit 10 includes a turbine shaft 1001. The turbine shaft 1001 is provided with a plurality of turbine stators 1003 and turbine rotors 1002 arranged axially. When liquid flows through the turbine rotors 1002, it drives the turbine shaft 1001 to rotate. The oscillation unit is composed of an eccentric shaft 9. One end of the turbine shaft 1001 and one end of the eccentric shaft 9 are provided with splines 6 that engage with the splined shaft 5.

[0041] The shell is internally provided with a plurality of mounting supports 8, both ends of the eccentric shaft 9 and the turbine shaft 1001 are rotationally connected to the mounting supports 8, the mounting supports 8 are equidistantly provided with a plurality of through holes 801 for axial liquid circulation along the circumferences of the mounting supports 8, the axial liquid circulation simultaneously causes the turbine shaft 1001 to drive the eccentric shaft 9 to perform transverse oscillation.

[0042] The turbine rotor 1002 is sleeved on the inner side of the turbine stator 1003, the turbine stator 1003 is positioned in the upper shell 2 through the nut 3, in the structure, the turbine rotor 1002 is provided with the second blades 1005 along the circumferences of the turbine rotor 1002, the turbine stator 1003 is provided with the first blades 1004 along the circumferences of the turbine stator 1003, and the second blades 1005 and the first blades 1004 have the same inclination direction.

[0043] Embodiment 2

[0044] With reference to Figures 1-3 The embodiment also discloses a transverse hydraulic oscillator, the shell is a split structure, which is composed of a lower shell 7 and an upper shell 2, and the connecting position is connected through a double male joint 4, the upper shell 2 is axially connected with an upper joint 1, the lower shell 7 is axially connected with a lower joint 12, in the structure, bearing sleeves 11 are arranged between both ends of the eccentric shaft 9 and the mounting supports 8, and taper sleeves 13 are arranged on the outer sides of the mounting supports 8, bearing sleeves 11 are also arranged between both ends of the turbine shaft 1001 and the mounting supports 8, and taper sleeves 13 are arranged on the outer sides of the mounting supports 8.

[0045] The specific implementation process is as follows: the lower shell 7 and the upper shell 2 are assembled through the double male joint 4, and the spline shaft 5 is used to butt joint the turbine shaft 1001 and the eccentric shaft 9; water is introduced into the upper shell 2, and the water flow drives the turbine rotor 1002 and the turbine shaft 1001 to rotate; the eccentric shaft 9 is radially rotated to impact the lower shell 7, so that a transverse oscillation force is generated at the position of the lower shell 7.

[0046] Many other changes and modifications can be made to the present application without departing from the spirit and scope of the application. It should be understood that the application is not limited to the specific embodiments described herein, but only by the claims made below.

Claims

1. A lateral hydraulic shaker, characterized by, The utility model relates to a liquid driven eccentric shaft, which comprises a shell, a driving part (10) and an oscillation part arranged coaxially inside the shell, and a spline shaft (5) arranged between the driving part (10) and the oscillation part. The driving part (10) comprises a turbine shaft (1001) provided with turbine stators (1003) and turbine rotors (1002) along the axial direction, and the turbine shaft (1001) is driven to rotate when liquid flows through the turbine rotors (1002). The oscillation part is composed of an eccentric shaft (9), and the shell is provided with a plurality of mounting supports (8), both ends of the eccentric shaft (9) and the turbine shaft (1001) are rotatably connected to the mounting supports (8), a plurality of through holes (801) for axial liquid flow are equidistantly arranged on the circumference of the mounting supports (8), and the axial liquid flow simultaneously drives the turbine shaft (1001) to drive the eccentric shaft (9) to perform transverse oscillation. The shell is a split structure composed of a lower shell (7) and an upper shell (2), and the connection part is connected by a double male joint (4). The upper shell (2) is axially connected with an upper joint (1), and the lower shell (7) is axially connected with a lower joint (12).

2. A lateral hydraulic oscillator according to claim 1, wherein, The turbine rotor (1002) is sleeved on the inner side of the turbine stator (1003), and the turbine stator (1003) is positioned in the upper shell (2) by a nut (3).

3. A transverse hydrodynamic oscillator according to claim 2, characterized in that The turbine rotor (1002) is provided with second blades (1005) along the circumference thereof, the turbine stator (1003) is provided with first blades (1004) along the circumference thereof, and the second blades (1005) and the first blades (1004) have the same inclination direction.

4. A lateral hydraulic oscillator according to claim 3, wherein, One end of the turbine shaft (1001) and one end of the eccentric shaft (9) are provided with splines (6) matched with the spline shaft (5). Bearing sleeves (11) are arranged between the two ends of the eccentric shaft (9) and the mounting supports (8), and the outer sides of the mounting supports (8) are provided with taper sleeves (13).

5. A lateral hydraulic oscillator according to claim 2, wherein, Bearing sleeves (11) are also arranged between the two ends of the turbine shaft (1001) and the mounting supports (8), and the outer sides of the mounting supports (8) are provided with taper sleeves (13).

6. A lateral hydraulic oscillator according to claim 5, wherein, ​ 7. A lateral hydraulic oscillator according to claim 5, wherein, ​

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