A turbine type hydraulic oscillator with drag reduction and speed-up double action

Abstract

The application discloses a turbine type hydraulic oscillator with drag reduction and speed increasing double action, which comprises a shell, a turbine main shaft rotatingly arranged in the shell, a plurality of turbine components capable of driving the turbine main shaft to rotate and being spaced and arranged on the turbine main shaft, a central rod rotatingly connected in the shell through a bearing member and being fixedly arranged at the lower end of the turbine main shaft, and a pulse pressure generating component arranged at the bottom of the central rod and capable of generating periodic pulse pressure. The shell, the turbine main shaft, the turbine components, the central rod and the pulse pressure generating component in the application can cooperate to form periodic pulse pressure, so that the application can generate regular vibration and axial impact, and can effectively reduce the friction and effectively improve the drilling efficiency. In addition, all the components in the application are made of metal materials, have good heat resistance, and the application has compact structure, is not easy to wear, has low pressure consumption, and can effectively prolong the service life of the application.

Description

Technical Field

[0001] This invention relates to a hydraulic oscillator, specifically a turbine-type hydraulic oscillator with the dual functions of drag reduction and speed increase. Background Technology

[0002] In recent years, with the increasing efforts in unconventional oil and gas extraction, the complexity of wellbore structures has gradually increased. In long horizontal wells, extended reach wells, and multi-branch horizontal wells, the friction between the drill string and the well wall is high during drilling, often resulting in pressure drag, which makes it impossible to implement effective drilling pressure and seriously affects drilling speed.

[0003] To improve drilling speed, hydraulic oscillators are widely used in oil and gas drilling operations. They generate vibrations of a specific frequency and amplitude in the drill string, converting static friction between the drill string and the wellbore into dynamic friction, reducing frictional resistance, effectively mitigating pressure build-up, and improving drilling efficiency. However, existing hydraulic oscillators are typically screw-type, which suffer from high pressure loss, are prone to wear, and are not heat-resistant, affecting their service life. Furthermore, screw-type oscillators have poor friction-reducing effects and provide insufficient impact force, severely impacting drilling efficiency. Summary of the Invention

[0004] To address the aforementioned shortcomings in the existing technology, this invention aims to provide a turbine-type hydraulic oscillator with both drag reduction and speed-up functions, thereby improving service life and drilling efficiency.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a turbine-type hydraulic oscillator with dual functions of drag reduction and speed increase, comprising a housing, a turbine main shaft rotatably disposed within the housing, multiple turbine components spaced apart on the turbine main shaft capable of driving the turbine main shaft to rotate, a central rod fixed to the lower end of the turbine main shaft and rotatably connected to the housing via a bearing component, and a pulse pressure generating component assembled at the bottom of the central rod capable of generating periodic pulse pressure.

[0006] As a limitation of the present invention, the central rod includes a central rod body, a central through hole is provided at the center of the central rod body along the axial direction of the central rod body, and a plurality of lateral holes communicating with the central through hole are provided circumferentially on the side wall of the central rod body near the turbine main shaft.

[0007] As a further limitation of the present invention, the turbine spindle includes a turbine spindle body rotatably disposed within a housing and a flow divider sleeve fixedly disposed at the bottom of the turbine spindle body; a flow-blocking member is fixedly disposed on the inner wall of the housing below the flow divider sleeve, and the flow divider sleeve and the flow-blocking member cooperate with each other to allow drilling fluid to enter multiple lateral holes.

[0008] As a further definition of the invention, the turbine assembly includes a turbine stator fixed to the inner wall of the housing and a turbine rotor fixed to a corresponding position on the turbine main shaft and adapted to the turbine stator.

[0009] As a further definition of the present invention, the pulse pressure generating assembly includes a rotary valve fixed to the bottom end of the central rod and a stationary valve fixed to the bottom end of the housing and fitted with the rotary valve. A spring is fixed between the lower end of the stationary valve and the bottom of the housing. The rotary valve includes a rotary valve body, a rotary valve circular hole located at the center of the rotary valve body, and four rotary valve square holes arranged at equal intervals around the rotary valve circular hole on the rotary valve body. The stationary valve includes a stationary valve body, a stationary valve circular hole located at the center of the stationary valve body, and four stationary valve square holes arranged at equal intervals around the stationary valve circular hole on the stationary valve body.

[0010] As another limitation of the present invention, the housing, turbine main shaft, turbine assembly, center rod and pulse pressure generating assembly are all made of metallic materials.

[0011] By adopting the above-described technical solution, the beneficial effects achieved by this invention compared to the prior art are as follows: This invention employs a structure combining a housing, turbine spindle, turbine assembly, central rod, and pulse pressure generating assembly. Drilling fluid enters from the top of the housing, then sequentially flows into the turbine assembly, central rod, and pulse pressure generating assembly, finally exiting from the bottom of the housing. The turbine stator and rotor in the turbine assembly work together to convert the drilling fluid pressure into mechanical energy. The turbine rotor drives the turbine spindle to rotate, which in turn drives the central rod. The central rod then drives the rotary valve in the pulse pressure generating assembly. During rotation, the relative position between the rotary valve and the stationary valve changes, altering the area connecting the square orifice of the rotary valve and the square orifice of the stationary valve. This creates a periodic pressure difference across the pulse pressure generating assembly, generating periodic pulse pressure. This allows the invention to produce both regular vibration and axial impact, effectively reducing friction and improving drilling efficiency. Furthermore, all components are made of metal, exhibiting excellent heat resistance. The invention also features a compact structure, is resistant to wear, and has low pressure loss, effectively extending its service life. This invention is suitable for drilling operations under complex geological conditions. Attached Figure Description

[0012] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0013] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention; Figure 2 This is a schematic diagram of the drilling fluid flow direction in an embodiment of the present invention; Figure 3 This is a cross-sectional view of the rotary valve in an embodiment of the present invention; Figure 4 This is a schematic diagram showing the relative positions of the rotary valve and the stationary valve during the rotation of the rotary valve in an embodiment of the present invention; In the diagram: 1. Housing; 2. Turbine main shaft body; 3. Flow divider sleeve; 4. Main shaft bearing; 5. Turbine stator; 6. Turbine rotor; 7. Flow baffle; 8. Center rod; 9. Bearing component; 10. Rotary valve; 101. Rotary valve body; 102. Rotary valve round hole; 103. Rotary valve square hole; 11. Static valve; 12. Spring. Detailed Implementation

[0014] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustrative and understanding purposes only and are not intended to limit the scope of the invention.

[0015] Example: A turbine-type hydraulic oscillator with dual functions of drag reduction and speed increase. like Figure 1 As shown, this embodiment includes a housing 1, a turbine main shaft rotatably disposed within the housing 1, multiple turbine assemblies spaced apart on the turbine main shaft capable of driving the turbine main shaft to rotate, a central rod 8 fixed at the lower end of the turbine main shaft and rotatably connected to the housing 1 via a bearing component 9, and a pulse pressure generating assembly assembled at the bottom of the central rod 8 capable of generating periodic pulse pressure. The housing 1, turbine main shaft, turbine assemblies, central rod 8, and pulse pressure generating assembly are all made of metal materials.

[0016] The turbine main shaft includes a turbine main shaft body 2 rotatably mounted in a housing 1 via a main shaft bearing 4 and a flow divider sleeve 3 fixed at the bottom of the turbine main shaft body 2. A flow-blocking member 7 is fixed on the inner wall of the housing 1 at a position below the flow divider sleeve 3. The flow-blocking member 7 is made of metal material. The main shaft bearing 4 is an existing bearing.

[0017] The center rod 8 includes a center rod body. A central through hole is formed at the center of the center rod body along its axial direction. Multiple lateral holes communicating with the central through hole are spaced apart on the side wall of the center rod body near the turbine spindle end. The flow divider sleeve 3 and the flow baffle 7 cooperate to allow drilling fluid to enter the multiple lateral holes.

[0018] The turbine assembly includes a turbine stator 5 fixed on the inner wall of the housing 1 and a turbine rotor 6 fixed at a corresponding position on the turbine main shaft and adapted to the turbine stator 5. When the drilling fluid flows through the turbine stator 5 and the turbine rotor 6, the turbine rotor 6 can drive the turbine main shaft to rotate.

[0019] The pulse pressure generating assembly includes a rotary valve 10 fixed to the bottom end of the central rod 8 and a stationary valve 11 fixed to the bottom end of the housing 1 and fitted with the rotary valve 10. A spring 12 is fixed between the lower end of the stationary valve 11 and the bottom of the housing 1. Figure 3 As shown, the rotary valve 10 includes a rotary valve body 101, a rotary valve circular hole 102 located at the center of the rotary valve body 101, and four rotary valve square holes 103 arranged at equal intervals around the rotary valve circular hole 102 on the rotary valve body 101. The stationary valve 11 includes a stationary valve body, a stationary valve circular hole located at the center of the stationary valve body, and four stationary valve square holes arranged at equal intervals around the stationary valve circular hole on the stationary valve body. The rotary valve body 101 and the stationary valve body have the same dimensions, the rotary valve circular hole 102 and the stationary valve circular hole have the same dimensions, the rotary valve square holes 103 and the stationary valve square holes have the same dimensions, the rotary valve circular hole 102 is positioned on the rotary valve body 101 in the same position as the stationary valve circular hole on the stationary valve body, and the four rotary valve square holes 103 are positioned on the rotary valve body 101 in the same position as the four stationary valve square holes on the stationary valve body.

[0020] The working principle of this embodiment is as follows: Figure 2 As shown, drilling fluid enters from the upper part of the casing 1, then sequentially enters the turbine assembly, the center rod 8, and the pulse pressure generating assembly, finally flowing out from the lower part of the casing 1. The turbine stator 5 and turbine rotor 6 in the turbine assembly work together to convert the pressure of the drilling fluid into mechanical energy. The turbine rotor 6 drives the turbine main shaft to rotate, which in turn drives the center rod 8 to rotate, and the rotation of the center rod 8 drives the rotary valve 10 in the pulse pressure generating assembly to rotate. Figure 4 As shown, Figure 4 The example only shows the relative positional relationship between the rotary valve 10 and the stationary valve 11 in four instantaneous states when the rotary valve 10 is rotating. Figure 4 The dashed box represents the square hole of the stationary valve, and the solid box represents the square hole 103 of the rotary valve. Specifically, during the rotation of the rotary valve 10, the relative position between the rotary valve 10 and the stationary valve 11 changes, and the area connecting the square hole 103 of the rotary valve 10 and the square hole of the stationary valve changes accordingly. At this time, a periodic pressure difference can be formed on both sides of the pulse pressure generating component. The periodic pressure difference can form a periodic pulse pressure, thereby enabling the present invention to generate both regular vibration and axial impact.

[0021] It should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A turbine-type hydraulic oscillator with dual functions of drag reduction and speed increase, characterized in that: It includes a housing, a turbine main shaft rotatably disposed within the housing, multiple turbine assemblies spaced apart on the turbine main shaft that can drive the turbine main shaft to rotate, a central rod fixed at the lower end of the turbine main shaft and rotatably connected to the housing via a bearing component, and a pulse pressure generating assembly assembled at the bottom of the central rod that can generate periodic pulse pressure.

2. The turbine-type hydraulic oscillator with dual functions of drag reduction and speed increase according to claim 1, characterized in that: The central rod includes a central rod body, a central through hole is provided at the center of the central rod body along the axial direction of the central rod body, and a plurality of lateral holes communicating with the central through hole are provided circumferentially on the side wall of the central rod body near the turbine main shaft.

3. A turbine-type hydraulic oscillator with dual functions of drag reduction and speed increase according to claim 2, characterized in that: The turbine main shaft includes a turbine main shaft body rotatably disposed within a housing and a flow divider sleeve fixedly disposed at the bottom of the turbine main shaft body; a flow-blocking component is fixedly disposed on the inner wall of the housing below the flow divider sleeve, and the flow divider sleeve and the flow-blocking component are connected. The combined action allows drilling fluid to enter multiple lateral holes.

4. A turbine-type hydraulic oscillator with dual functions of drag reduction and speed increase as described in claim 3, characterized in that: The turbine assembly includes a turbine stator fixed to the inner wall of the housing and a turbine rotor fixed at a corresponding position on the turbine main shaft and adapted to the turbine stator.

5. A turbine-type hydraulic oscillator with dual functions of drag reduction and speed increase according to claim 4, characterized in that: The pulse pressure generating assembly includes a rotary valve fixed to the bottom of the central rod and a stationary valve fixed to the bottom of the housing and fitted with the rotary valve. A spring is fixed between the lower end of the stationary valve and the bottom of the housing. The rotary valve includes a rotary valve body, a rotary valve circular hole at the center of the rotary valve body, and four rotary valve square holes arranged at equal intervals around the rotary valve circular hole on the rotary valve body. The stationary valve includes a stationary valve body, a stationary valve circular hole at the center of the stationary valve body, and four stationary valve square holes arranged at equal intervals around the stationary valve circular hole on the stationary valve body.

6. A turbine-type hydraulic oscillator with dual functions of drag reduction and speed increase according to any one of claims 1-5, characterized in that: The housing, turbine spindle, turbine assembly, center rod, and pulse pressure generating assembly are all made of metallic materials.

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