Integrated drilling fluid pulse oscillator

Abstract

The utility model relates to the technical field of drilling equipment, concretely relates to integrated drilling fluid pulse oscillator, it includes drilling outer tube, the upper end of drilling outer tube connects hydraulic propeller, the axial sliding sleeve of drilling outer tube is equipped with drilling rod, is connected through elastic assembly between drilling outer tube and drilling rod, and the drill bit end of drilling rod contacts with formation, is provided with oscillation subassembly in the cylinder of drilling outer tube, and oscillation subassembly includes high frequency oscillation subassembly and low frequency oscillation subassembly, is used for providing different oscillation effects for drilling rod, is applicable to the drilling work of different geological formation. The utility model solves the technical problem of different frequency oscillation effect for different geological formation in the drilling process.

Description

Technical Field

[0001] This utility model relates to the field of drilling equipment technology, and more specifically, to an integrated drilling fluid pulse oscillator. Background Technology

[0002] Drilling equipment is a mechanical device used in oil and gas exploration, development, and geological drilling, designed to achieve functions such as formation fracturing, cuttings removal, wellbore stabilization, and data acquisition. A drilling oscillator is a downhole tool that reduces friction between the drill string and the wellbore through mechanical vibration or hydraulic pulses, improving drilling pressure transmission efficiency. It is mainly used in complex well types such as extended reach wells and horizontal wells to solve the "pressure drag" problem. Its working principle involves applying axial or radial vibration to the drill string, converting static friction between the drill string and the wellbore into dynamic friction. The high-frequency pressure pulses generated by the oscillation create localized stress concentration at the drill bit, which improves rock fracturing efficiency and increases drilling efficiency.

[0003] A Chinese utility model patent, titled "A Low-Energy Hydraulic Oscillator for Drilling" (publication number CN215169858U), includes a central tube with a sliding sleeve connected to it. The bottom of the sliding sleeve and a lower connector are connected by a spring. Several oscillating plates are fixedly connected to the upper part of the sliding sleeve, extending into the central tube through a window. This utility model utilizes the flow of drilling fluid to drive the sliding sleeve and spring to generate axial fluctuations, thus producing oscillations. This avoids the problem of poor oscillation effect caused by oscillations within the tubing string in previous technologies, effectively solving the problem of frictional resistance in drilling.

[0004] Although this invention can generate axial oscillation, i.e., produce an oscillation effect to reduce frictional resistance during drilling, when facing formations with different hardness and properties, the constant oscillation frequency can easily lead to some drilling channels being difficult to drill or collapsing during the drilling process. It is difficult to adjust the oscillation frequency to adapt to different drilling geology. Summary of the Invention

[0005] The purpose of this application is to provide an integrated drilling fluid pulse oscillator, which solves the technical problem of applying different frequencies of oscillation to different geological formations during the drilling process.

[0006] To solve the above-mentioned technical problems, the solution adopted in this application is as follows:

[0007] An integrated drilling fluid pulse oscillator includes a drilling outer cylinder, the upper end of which is connected to a hydraulic thruster.

[0008] Preferably, a drill rod is axially slidably sleeved inside the drilling outer cylinder, and the drilling outer cylinder and the drill rod are connected by an elastic component, with the drill bit end of the drill rod in contact with the formation.

[0009] Preferably, the drilling outer cylinder is provided with an oscillation assembly, which includes a high-frequency oscillation assembly and a low-frequency oscillation assembly.

[0010] Preferably, the high-frequency oscillation component includes a through cavity, in which a vortex cylinder is rotatably disposed. At least one spiral liquid groove is formed on the wall of the vortex cylinder, and one end of the spiral liquid groove is open, connecting to the space above the drilling outer cylinder. At least one flow channel is also formed on the wall of the circular cavity, and one end of the flow channel is also open, connecting to the space below the drilling outer cylinder where the drilling rod is disposed.

[0011] Preferably, the low-frequency oscillation component includes a second through cavity, a baffle column is fixedly installed in the second through cavity, a liquid outlet valve is provided at the upper part of the baffle column, the liquid outlet valve is connected to the inside and outside of the drilling outer cylinder, a sudden expansion pipe is provided at the lower part of the baffle column, and a plug is provided at the sudden expansion point in the sudden expansion pipe.

[0012] Preferably, a second liquid outlet valve is also provided on the side wall of the drilling outer cylinder, and the second liquid outlet valve is located on the sliding path of the drilling rod in the drilling outer cylinder.

[0013] Preferably, a flow guiding component is also provided inside the drilling outer cylinder, and the flow guiding component is located between the oscillation component and the hydraulic thruster.

[0014] Preferably, a pressure sensor is also provided on the drilling outer cylinder, and the pressure sensor is connected to a controller via a line, and the controller is connected to the flow guiding component.

[0015] Preferably, a vortex fan blade is coaxially fixed on the end of the vortex tube near the hydraulic thruster.

[0016] Preferably, the sudden expansion pipe includes a narrow pipe and a wide pipe connected together, wherein the cross-sectional area of ​​the wide pipe is larger than that of the narrow pipe.

[0017] Preferably, a wide pipe connects to the space at one end of the drilling outer cylinder where the drill rod is located, and a narrow pipe connects to the space at one end of the drilling outer cylinder where the hydraulic thruster is located.

[0018] Preferably, a plug is axially provided inside the wide pipe. The plug is located at the connection of the two pipes. The plug is axially slidably disposed in the groove of the sliding column. The plug and the bottom surface of the groove are respectively connected to the two ends of the spring. The sliding column is coaxially fixed inside the wide pipe.

[0019] Preferably, the elastic component includes several butterfly springs, which are stacked one on top of the other inside the drilling outer cylinder.

[0020] Preferably, the drill rod includes a drill bit located at the lower end of the drilling outer cylinder. The drill bit is fixed to one end of the rod, which is slidably disposed inside the drilling outer cylinder. A plug is fixed to the other end of the rod and is slidably disposed at the bottom of the pressurization chamber. An inverted conical chamber is connected inside the pressurization chamber, which is fixed inside the drilling outer cylinder. The top of the pressurization chamber is connected to a first through chamber and a second through chamber.

[0021] Preferably, a limiting ring plate is also fixed inside the drilling outer cylinder, the rod is axially sleeved inside the limiting ring plate, and a piston and a baffle are fixed on the rod. The piston is located above the limiting ring plate and is slidably disposed inside the drilling outer cylinder, and the baffle is located below the limiting ring plate and abuts against the elastic component.

[0022] The technical solution of this application has at least the following advantages and beneficial effects:

[0023] In this invention, by setting a low-frequency oscillation component and a high-frequency oscillation component inside the drilling outer cylinder, and using the pressurized drilling fluid generated by the hydraulic thruster to be introduced into the two oscillation components, different frequency oscillation effects are generated, thereby enabling the drill bit of the drilling rod to generate different oscillations and to carry out drilling work on different geological formations.

[0024] In this invention, the high-frequency oscillation component utilizes the spiral liquid groove on the rotating vortex cylinder to connect the flow channel at intervals, thereby using pressurized drilling fluid to push the drill rod and generate high-frequency oscillation by directly displacing the drill rod at high speed.

[0025] In this invention, the low-frequency oscillation component generates low-frequency oscillation by connecting a sudden expansion pipe next to the pressurized, high-speed flowing drilling fluid and using Bernoulli's principle to drive the drill rod to perform bidirectional displacement, thereby reducing the displacement frequency of the drill rod.

[0026] In this invention, a pressure sensor is installed on the outer cylinder of the drilling machine, and a flow guiding component is installed above the two oscillation components. The pressure sensor is connected to the flow guiding component. The pressure range generated when drilling into formations of different hardness is used to control the flow guiding component to guide the pressurized drilling fluid to different oscillation components, thereby realizing the function of adjusting the oscillation components of different frequencies according to the changes in the formation. Attached Figure Description

[0027] Figure 1 This is a cross-sectional structural diagram of the present invention.

[0028] Figure 2 This is a cross-sectional view of the low-frequency oscillation component of this utility model.

[0029] Figure 3 This is a cross-sectional view of the low-frequency oscillation component of this utility model. Figure 1 .

[0030] Figure 4This is a cross-sectional view of the high-frequency oscillation component of this utility model. Figure 1 .

[0031] Figure 5 This is a cross-sectional view of the high-frequency oscillation component of this utility model. Figure 2 .

[0032] Figure 6 This is a cross-sectional view of the high-frequency oscillation component of this utility model. Figure 3 .

[0033] Figure 7 This is a cross-sectional view of the high-frequency oscillation component of this utility model. Figure 4 .

[0034] Figure 8 This is a schematic diagram of the structure of this utility model.

[0035] Figure 9 This is a partial cross-sectional structural diagram of the present invention.

[0036] In the diagram: 1-Drilling outer cylinder, 2-Drill rod, 201-Drill bit, 202-Plug, 203-Baffle, 204-Piston, 205-Limiting ring plate, 3-Elastic component, 4-High-frequency oscillation component, 401-Through cavity one, 402-Swirl tube, 403-Vortex fan blade, 404-Helical fluid groove, 405-Flow channel, 5-Low-frequency oscillation component, 501-Through cavity two, 502-Baffle column, 503-Narrow pipe, 504-Wide pipe, 505-Plug, 506-Slide column, 507-Spring, 508-Outlet valve port one, 6-Outlet valve port two, 7-Flow guiding component, 8-Pressure chamber, 9-Pressure sensor. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0038] It should be noted that similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. The terms "center," "upper," "lower," "inner," and "outer," indicating orientation or positional relationships based on the orientation or positional relationships shown in the figures, or the orientation or positional relationships commonly used when the product is in use, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore should not be construed as a limitation on this application. It should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0039] Example 1

[0040] Please refer to Figures 1-9 This utility model provides an integrated drilling fluid pulse oscillator, including a drilling outer cylinder 1, a drilling rod 2 axially slidably sleeved inside the drilling outer cylinder 1, and the drill bit 201 end of the drilling rod 2 extending from the front end of the drilling outer cylinder 1. During the drilling process, the drill bit 201 end of the drilling rod 2 contacts the formation to drill the ground, while the cylinder wall of the drilling outer cylinder 1 slides in the drilled formation channel and is connected to a pushing device at the rear end of the drilling outer cylinder 1, which drives the drill bit 201 end of the drilling rod 2 to continue drilling to the formation depth.

[0041] Furthermore, an oscillation assembly is installed inside the outer cylinder 1. The oscillation assembly squeezes the drilling fluid inside the cylinder, and the pressurized drilling fluid applies a force to the drill rod 2 in the outer cylinder 1, causing the drill rod 2 to move axially within the outer cylinder 1. The outer cylinder 1 and the drill rod 2 are connected by an elastic assembly 3. After the drill rod 2 moves, it will return to its original position after the drilling fluid is depressurized, due to the elastic action of the elastic assembly 3. Then the oscillation assembly continues to squeeze the drilling fluid, repeating the above steps, thereby realizing the reciprocating movement of the drill rod 2 and generating an oscillation effect, so that the drill bit 201 end of the drill rod 2 performs drilling work through oscillation.

[0042] The device for pressurizing the drilling fluid inside the outer casing 1 is a hydraulic thruster, which is an existing device used to pump and transport liquids (such as water pumps) to achieve the effects of pressurizing and propulsion. Its specific structural principle is not described in detail in this specification.

[0043] The oscillation component includes a high-frequency oscillation component 4 and a low-frequency oscillation component 5.

[0044] The high-frequency oscillation component 4 directly pressurizes the drilling fluid, causing the drill rod 2 to move. After the drill rod 2 moves, the outlet valve 6 is exposed, releasing pressure on the drilling fluid and achieving a high-frequency oscillation effect. The low-frequency oscillation component 5 opens the outlet valve 508, allowing the pressurized drilling fluid to flow directly from the outer cylinder 1 to the outlet valve 508 at high speed (Bernoulli's principle). This creates a negative pressure inside the outer cylinder 1, causing the drill rod 2 to move in the opposite direction. Once the negative pressure returns to normal, the drill rod 2 resets. Then, the pressurized drilling fluid continues to pressurize the outer cylinder 1, causing the drill rod 2 to move in the forward direction. After the drill rod 2 moves, the outlet valve 6 is exposed, releasing pressure on the drilling fluid. The bidirectional displacement of the drill rod 2 creates a low-frequency oscillation effect.

[0045] Among them, the first outlet valve 508 and the second outlet valve 6 are both installed on the drilling outer cylinder 1, connecting the inner and outer spaces of the cylinder.

[0046] For specific details, please refer to Figures 2-7 The high-frequency oscillation component 4 includes a through cavity 401, a vortex tube 402, a vortex fan blade 403, a spiral liquid tank 404, and a flow channel 405.

[0047] The through cavity 401 is fixedly installed inside the drilling outer cylinder 1. The through cavity 401 has a vertically penetrating circular chamber. A vortex cylinder 402 is rotatably installed inside the circular chamber. A vortex fan blade 403 is coaxially fixed on the end of the vortex cylinder 402 near the hydraulic thruster. When the drilling fluid is pressurized, the pressurized drilling fluid flows through the vortex fan blade 403 and drives it to rotate. The vortex fan blade 403 then drives the vortex cylinder 402 to rotate relative to the through cavity 401.

[0048] At least one spiral fluid groove 404 is provided on the wall of the vortex cylinder 402. One end of the spiral fluid groove 404 is open and connects to the drilling outer cylinder 1 space where the vortex fan blade 403 is located, so that the pressurized drilling fluid can enter the spiral fluid groove 404. The other end of the spiral fluid groove 404 is not provided with a through-hole, so that the spiral fluid groove 404 and the circular chamber wall of the through cavity 401 form a non-flowing space (only one opening is provided, so there is no flow). A flow channel 405 is also provided on the circular chamber wall. One end of the flow channel 405 is also provided with an opening, which connects to the drilling outer cylinder 1 space where the drill rod 2 is located. The flow channel 405 and the cylinder wall of the vortex cylinder 402 form a non-flowing space.

[0049] During the operation of the high-frequency oscillation component 4, when the high-frequency oscillation component 4 is not working, the flow channel 405 is in contact with the wall of the vortex cylinder 402, and the spiral liquid channel 404 is in contact with the wall of the circular chamber. The flow channel 405 and the spiral liquid channel 404 are separated and do not flow, so the drilling fluid cannot flow from one end of the hydraulic thruster of the outer drilling cylinder 1 to one end of the drill rod 2 of the outer drilling cylinder 1. When the high-frequency oscillation component 4 starts working, the drilling fluid is pressurized and flows, the vortex cylinder 402 rotates, and the spiral liquid channel 404 on the vortex cylinder 402 rotates accordingly. During the rotation, the spiral liquid channel 404 will contact and connect with the flow channel 405 on the wall of the circular chamber, so that the pressurized drilling fluid flows into the space of the outer drilling cylinder 1 where the drill rod 2 is located, squeezing the drill rod 2 and causing it to move forward. When the high-frequency oscillation component 4 continues to work, the vortex cylinder 402 continues to flow. As the spiral fluid continues to rotate, it causes the spiral fluid tank 404 to rotate and separate from the flow channel 405 again. The two are no longer connected, and the pressurized drilling fluid no longer enters the drill rod 2 position. The pressure at the drill rod 2 position remains constant. At this time, due to the positive displacement of the drill rod 2, the outlet valve port 2 6 set at the corresponding position of the drill rod 2 is no longer blocked by the drill rod 2 and is connected to the inner space of the outer drilling cylinder 1. This allows the pressurized drilling fluid to flow out from the outlet valve port 2 6 due to the pressure difference, thereby depressurizing the drilling fluid at the drill rod 2. This causes the drill rod 2, which has been positively displaced due to the pressurized drilling fluid, to begin to move back to its original position. As the pressure decreases, the repositioned drill rod 2 blocks the outlet valve port 2 6 again, maintaining the normal pressure environment at the drill rod 2 until the spiral fluid tank 404 rotates again and connects with the flow channel 405. The above working process is repeated, causing the drill rod 2 to move back to its original position, producing an oscillation effect.

[0050] For specific details, please refer to Figures 5-7 The low-frequency oscillation component 5 includes a through cavity 2 501, a baffle column 502, a sudden expansion pipe, a plug 505, a chute column 506, a spring 507, and an outlet valve port 1 508.

[0051] The second through cavity 501 is fixedly installed inside the drilling outer cylinder 1. The second through cavity 501 has a vertically penetrating circular chamber. A flow-blocking column 502 is fixedly installed inside the circular chamber. The side wall of the circular chamber near the liquid thruster is connected to the first outlet valve 508. When the drilling fluid is pressurized, the first outlet valve 508 will be directly subjected to the pressure from the drilling fluid, causing the valve of the first outlet valve 508 to open under pressure, and the pressurized drilling fluid flows out to the outside of the drilling outer cylinder 1.

[0052] An abrupt expansion pipe runs axially through the flow-blocking column 502. This expansion pipe is formed by connecting a narrow pipe 503 and a wide pipe 504. The cross-sectional area of ​​the wide pipe 504 is larger than that of the narrow pipe 503. The wide pipe 504 connects to the space at one end of the drilling outer casing 1 where the drill rod 2 is located, and the narrow pipe 503 connects to the space at one end of the drilling outer casing 1 where the hydraulic thruster is located. A plug 505 is axially installed inside the wide pipe 504, located at the connection point of the two pipes. The plug 505 is axially slidably positioned within the groove of the sliding column 506. The plug 505 and the bottom surface of the groove are respectively connected to the two ends of a spring 507, allowing the plug 505 to abut against the connection point of the two pipes under the elastic force of the spring 507. The sliding column 506 is coaxially fixed inside the wide pipe 504.

[0053] During the operation of the low-frequency oscillation component 5, when the low-frequency oscillation component 5 is not working, the outlet valve 508 is not pressurized, the valve is closed, and the plug 505 is not subjected to the drilling fluid pressure at the narrow pipe 503, thus the plug 505 seals the suddenly expanding pipe. When the low-frequency oscillation component 5 starts working, the pressurized drilling fluid opens both the closed valve and the sealed plug 505 simultaneously through the high pressure. Most of the drilling fluid is pumped out of the cylinder through the outlet valve 508, and a small portion enters the wide pipe 504 through the narrow pipe 503. Due to the sudden increase in the cross-sectional area of ​​the suddenly expanding pipe and the high-velocity drilling fluid outside the narrow pipe 503, the pressure at the wide pipe 504 drops sharply, creating a negative pressure (Bernoulli's principle). This causes the drilling fluid at the drill rod 2 to flow towards the narrow pipe 503, resulting in the drill rod 2 being displaced in the opposite direction due to the negative pressure. When the low-frequency oscillation component 5 starts working... When component 5 continues to operate, the pressurized drilling fluid begins to flow continuously into the wide pipe 504, pressurizing the drill rod 2 outside the wide pipe 504. This causes the drill rod 2 to change from negative pressure to positive pressure, thereby driving the drill rod 2 to move forward. The displaced drill rod 2 will then open the blocked outlet valve 6, depressurizing the pressurized environment at the drill rod 2. The drilling fluid at the drill rod 2 will begin to depressurize, causing the plug 505, which was compressed under pressure at the wide pipe 504, to elastically reset after depressurization, re-blocking the suddenly expanding pipe. The depressurized drill rod 2 will also reset to block the outlet valve 6. At this time, the pressurized drilling fluid at the narrow pipe 503 will pressurize again and push the blocked plug 505, reopening the suddenly expanding pipe. The above working steps are repeated, causing the drill rod 2 to move back and forth, achieving the oscillation effect of the drill rod 2.

[0054] During low-frequency oscillation, the displacement process of drill pipe 2 is negative displacement-reset-positive displacement-reset. Compared with the displacement process of drill pipe 2 during high-frequency oscillation (positive displacement-reset), the single oscillation time of low-frequency oscillation is relatively longer and the oscillation frequency is relatively lower, hence it is low-frequency oscillation. However, because the displacement amplitude of drill pipe 2 is larger in low-frequency oscillation, its oscillation impact displacement is larger, while high-frequency oscillation has a higher impact frequency.

[0055] Preferably, by integrating a high-frequency oscillation component 4 and a low-frequency oscillation component 5 within the drilling outer casing 1, different components can be switched to improve drilling efficiency for different formation conditions. When facing hard formations, the pressurized drilling fluid uses the high-frequency oscillation component 4 to drive the drill bit 201 end of the drill pipe 2 to move slightly, generating high-frequency oscillations for fine rock breaking and quickly crushing hard rocks. When facing soft formations, the pressurized drilling fluid uses the low-frequency oscillation component 5 to drive the drill bit 201 end of the drill pipe 2 to move significantly, generating low-frequency oscillations for large-scale drilling mud breaking and reducing the risk of collapse of the soft wellbore due to excessively high-frequency oscillations.

[0056] For further details, please refer to... Figure 1 In order to enable drilling fluid to pass through different oscillation components in one direction within the drilling outer cylinder 1 and achieve different vibration frequencies, a flow guiding component 7 is also provided inside the drilling outer cylinder 1. The flow guiding component 7 is located between the oscillation component and the hydraulic thruster and is used to guide the drilling fluid pressurized by the hydraulic thruster to flow unidirectionally to the high-frequency oscillation component 4 or the low-frequency oscillation component 5.

[0057] Specifically, the flow guiding component 7 is set as a two-position three-way directional valve. The two-position three-way directional valve is an existing device, which is usually composed of a three-way valve body, a valve core, and an actuator. The valve core moves within the valve body through the actuator (such as a motor driving the valve core to rotate), thereby changing the position of the fluid channel to achieve fluid reversal.

[0058] The three-way valve body is equipped with a pressure-boosting inlet, a high-frequency outlet, and a low-frequency outlet, with the valve core located at the connection point of the three outlets. When the drill pipe 2 needs to perform high-frequency oscillation, the two-position three-way directional valve starts to switch, and the actuator drives the valve core to move, so that the pressure-boosting inlet is connected to the high-frequency outlet alone. The high-frequency outlet is connected to the through cavity 401 of the high-frequency oscillation component 4, thereby achieving high-frequency oscillation. At this time, the low-frequency outlet is blocked by the valve core, and no drilling fluid enters the low-frequency oscillation component 5. When the drill pipe 2 needs to perform low-frequency oscillation, the two-position three-way directional valve starts to switch, and the actuator drives the valve core to move, so that the pressure-boosting inlet is connected to the low-frequency outlet alone. The low-frequency outlet is connected to the through cavity 501 of the low-frequency oscillation component 5, thereby achieving low-frequency oscillation. At this time, the high-frequency outlet is blocked by the valve core, and no drilling fluid enters the high-frequency oscillation component 4.

[0059] For further details, please refer to... Figure 8When the drill pipe 2 drills into different formations, the flow guiding component 7 controls the valve core to guide the drilling fluid into different oscillation components. To change the oscillation frequency in real time using the flow guiding component 7, a pressure sensor 9 is fixedly installed on the outer drilling casing 1. The pressure sensor 9 is connected to a controller via wiring, which in turn connects to the actuator of the flow guiding component 7. The pressure sensor 9 is located on the outer drilling casing 1 near the drill bit 201 end of the drill pipe 2. When the drill bit 201 end of the drill pipe 2 drills into different formations, the pressure values ​​fed back to the pressure sensor 9 from hard and soft formations are also different.

[0060] When the pressure value of pressure sensor 9 is less than the preset pressure threshold range, the formation is soft. Pressure sensor 9 sends a pressure signal to the controller, which controls the actuator to move the valve core, connecting the pressurized inlet port to the high-frequency outlet port for low-frequency oscillation. When the pressure value of pressure sensor 9 is within the preset pressure threshold range, the formation is hard. Pressure sensor 9 sends a pressure signal to the controller, which controls the actuator to move the valve core, connecting the pressurized inlet port to the low-frequency outlet port for high-frequency oscillation.

[0061] It is worth noting that the oscillation assembly drives the drill pipe 2 to oscillate through the pressurized drilling fluid flow. The drilling fluid is pressurized and propelled by the hydraulic thruster. The first and second outlet valves are one-way valves, which will automatically open when subjected to hydraulic pressure inside the casing. The actuators of the hydraulic thruster and the flow guide assembly 7 require external power to drive them. Therefore, a high-temperature and high-pressure resistant waterproof wire is also installed inside the drilling outer casing 1. The wire is connected to an external generator (the external generator is placed on the ground), and the wire is connected to the actuators and the hydraulic thruster to provide them with power.

[0062] Example 2

[0063] To enhance the oscillation effect of drill pipe 2, please refer to... Figure 1 and Figure 9 In this embodiment, the drill rod 2 includes a drill bit 201, a plug 202, a baffle 203, a piston 204, and a limiting ring plate 205.

[0064] Specifically, the drill bit 201 is located at the front end of the drilling outer cylinder 1. The drill bit 201 is fixed to one end of the rod, which slides inside the drilling outer cylinder 1. The other end of the rod is fixed with a plug 202, which is slidably positioned at the bottom of the pressurization chamber 8. The pressurization chamber 8 has an inverted conical chamber running through it. The pressurization chamber 8 is fixed inside the drilling outer cylinder 1, and its top is connected to the first through chamber 401 and the second through chamber 501. When oscillation occurs, the pressurized drilling fluid flows into the inverted conical chamber. The volume of the fluid channel decreases, the flow rate decreases, the flow velocity increases, and the hydraulic pressure increases, so that the plug 202 is pushed more efficiently, causing the drill bit 201 on the rod to move.

[0065] Inside the drilling outer cylinder 1, a limiting ring plate 205 is fixed. The rod is axially sleeved inside the limiting ring plate 205, and a piston 204 and a baffle 203 are fixed on the rod. The piston 204 is located above the limiting ring plate 205, close to the oscillation component, and slides inside the drilling outer cylinder 1. The baffle 203 is located below the limiting ring plate 205 and abuts against the elastic component 3, so that the baffle 203 is subjected to elastic action.

[0066] When the pressurized drilling fluid pushes the plug 202, causing the entire drill rod 2 to shift, the piston 204 slides inside the outer cylinder 1 of the drilling system, and the push plate slides to squeeze the elastic component 3. During the oscillation process, after the drilling fluid is depressurized, the elastic component 3 will assist in driving the drill rod 2 to reset. During the entire cyclic oscillation process, the elastic component 3 can also absorb some lateral vibration, reduce the lateral collision between the drill rod 2 and the outer cylinder 1 of the drilling system, and improve the service life of the entire device.

[0067] Among them, the elastic component 3 is formed by stacking several butterfly springs. The butterfly springs have high rigidity and can withstand the cyclic oscillation from the drill pipe 2 while providing elasticity to the drill pipe 2, thus maintaining the elastic function for a long time while bearing a large load.

[0068] The various embodiments of this utility model have now been described in detail. To avoid obscuring the concept of this utility model, some details known in the art have not been described. Those skilled in the art will fully understand how to implement the technical solution of this utility model based on the above description. The scope of this utility model is defined by the appended claims.

Claims

1. An integrated drilling fluid pulse oscillator, comprising a drilling outer cylinder (1), wherein the upper end of the drilling outer cylinder (1) is connected to a hydraulic thruster, characterized in that; The drilling outer cylinder (1) is axially slidably fitted with a drilling rod (2), and the drilling outer cylinder (1) and the drilling rod (2) are connected by an elastic component (3). The drill bit (201) end of the drilling rod (2) is in contact with the formation. The drilling outer cylinder (1) is equipped with an oscillation assembly inside the cylinder, which includes a high-frequency oscillation assembly (4) and a low-frequency oscillation assembly (5). The high-frequency oscillation component (4) includes a through cavity (401), in which a vortex cylinder (402) is rotatably arranged. At least one spiral liquid groove (404) is opened on the cylinder wall of the vortex cylinder (402). One end of the spiral liquid groove (404) is open and connects to the space above the drilling outer cylinder (1). At least one flow channel (405) is also opened on the wall of the circular cavity. One end of the flow channel (405) is also open and connects to the space below the drilling outer cylinder (1) where the drilling rod (2) is arranged. The low-frequency oscillation component (5) includes a through cavity two (501), a baffle column (502) is fixedly installed in the through cavity two (501), a liquid outlet valve port one (508) is provided on the upper part of the baffle column (502), the liquid outlet valve port one (508) is connected to the inside and outside of the drilling outer cylinder (1), and a sudden expansion pipe is provided on the lower part of the baffle column (502), and a plug (505) is provided at the sudden expansion point in the sudden expansion pipe. The drilling outer cylinder (1) also has a liquid outlet port 2 (6) through it on the side wall. The liquid outlet port 2 (6) is located on the sliding path of the drilling rod (2) on the drilling outer cylinder (1).

2. The integrated drilling fluid pulse oscillator according to claim 1, characterized in that, The drilling outer cylinder (1) is also equipped with a flow guiding component (7), which is located between the oscillation component and the hydraulic thruster.

3. The integrated drilling fluid pulse oscillator according to claim 1, characterized in that, A pressure sensor (9) is also installed on the drilling outer cylinder (1). The pressure sensor (9) is connected to the controller via a line, and the controller is connected to the flow guiding component (7).

4. The integrated drilling fluid pulse oscillator according to claim 1, characterized in that, The vortex tube (402) has a vortex fan blade (403) coaxially fixed on one end near the hydraulic thruster.

5. The integrated drilling fluid pulse oscillator according to claim 1, characterized in that, The expansion pipe includes a narrow pipe (503) and a wide pipe (504) connected together, and the cross-sectional area of ​​the wide pipe (504) is larger than that of the narrow pipe (503). A wide pipe (504) connects to the space at one end of the drilling outer cylinder (1) where the drilling rod (2) is located, and a narrow pipe (503) connects to the space at one end of the drilling outer cylinder (1) where the hydraulic thruster is located.

6. The integrated drilling fluid pulse oscillator according to claim 5, characterized in that, A plug (505) is axially provided inside the wide pipe (504). The plug (505) is located at the connection of the two pipes. The plug (505) is axially slidably disposed in the groove of the sliding column (506). The plug (505) and the bottom surface of the groove are respectively connected to the two ends of the spring (507). The sliding column (506) is coaxially fixed inside the wide pipe (504).

7. The integrated drilling fluid pulse oscillator according to claim 1, characterized in that, The elastic component (3) includes several butterfly springs, which are stacked one on top of the other inside the drilling outer cylinder (1).

8. The integrated drilling fluid pulse oscillator according to claim 1, characterized in that, The drilling rod (2) includes a drill bit (201), which is located at the lower end of the drilling outer cylinder (1). The drill bit (201) is fixed on one end of the rod, which is slidably disposed inside the drilling outer cylinder (1). A plug (202) is fixed at the other end of the rod. The plug (202) is slidably disposed at the bottom of the pressurization chamber (8). An inverted conical chamber is connected inside the pressurization chamber (8). The pressurization chamber (8) is fixed inside the drilling outer cylinder (1), and its top is connected to the first through chamber (401) and the second through chamber (501).

9. The integrated drilling fluid pulse oscillator according to claim 8, characterized in that, The drilling outer cylinder (1) is also fixed with a limiting ring plate (205). The rod is axially sleeved in the limiting ring plate (205), and a piston (204) and a baffle (203) are fixed on the rod. The piston (204) is located above the limiting ring plate (205) and is slidably disposed in the drilling outer cylinder (1). The baffle (203) is located below the limiting ring plate (205) and abuts against the elastic component (3).

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