Dual feedback multi-dimensional impinger

Abstract

This invention belongs to the technical field of oil well drilling equipment, specifically relating to a dual-feedback multidimensional impactor. It aims to solve the problems of significantly reduced rock-breaking efficiency and increased drill bit wear when encountering hard or medium-hard coarse-grained heterogeneous rock formations during drilling. The invention includes a main body and a fluid channel disposed within the main body. The main body is arranged inside the drill bit. The fluid channel includes a fluid inlet, a jet channel, an attached-wall oscillation chamber, a first outlet, a second outlet, and a feedback channel. The fluid inlet, jet channel, attached-wall oscillation chamber, and feedback channel are arranged along the axial direction of the main body, while the first and second outlets are arranged radially. The fluid inlet, first outlet, and second outlet are connected to the outside of the main body. A mechanical feedback component is installed in the feedback channel. This invention can generate axial and radial impacts, improving operational efficiency.

Description

Technical Field

[0001] This invention belongs to the technical field of oil well drilling equipment, and specifically relates to a dual-feedback multidimensional impactor. Background Technology

[0002] With the development of oil and gas resources, shallow and easily exploitable resources are gradually being depleted, prompting the exploration and development field to move towards deep and ultra-deep wells. During the drilling process of deep and ultra-deep wells, due to the hardness of the rock at deep depths, which is characterized by high brittleness and high resistance to static pressure, rock breaking by impact is necessary.

[0003] In the current development of shale oil and gas, geothermal resources, complex geological conditions often lead to the encounter with hard strata and complex lithology. Drilling through these strata is difficult and inefficient. Typically, when encountering hard or medium-hard coarse-grained heterogeneous rock formations during drilling, the rock-breaking efficiency of the drill bit decreases significantly. Moreover, existing impactors have relatively complex structures and greater energy loss, resulting in insufficient energy transferred to the drill bit, low power, and low drilling efficiency, which also affects the drill bit's rock-breaking efficiency. Summary of the Invention

[0004] In order to solve the above-mentioned problems in the prior art, namely, the significant decrease in drill bit rock breaking efficiency and the significant increase in drill bit wear rate when encountering hard or medium hard coarse-grained heterogeneous rock layers during drilling, this invention provides a dual-feedback multidimensional impactor.

[0005] This application discloses a dual-feedback multidimensional impactor, which adopts the following technical solution:

[0006] A dual-feedback multidimensional impactor includes a main body and a fluid channel disposed in the main body;

[0007] The main body is arranged inside the drill bit;

[0008] The fluid channel includes a fluid inlet on one side of the main body, a jet channel inside the main body communicating with the fluid inlet, a wall-mounted oscillation cavity inside the main body communicating with the jet channel, a first outlet and a second outlet on the main body communicating with the wall-mounted oscillation cavity, and a feedback channel inside the main body communicating with the wall-mounted oscillation cavity and the jet channel at both ends respectively.

[0009] The fluid inlet, jet channel, wall-mounted oscillation cavity, and feedback channel are arranged along the main body axis, and the first outlet and the second outlet are arranged along the main body radially.

[0010] The fluid inlet, the first outlet, and the second outlet are connected to the outside of the main body;

[0011] The inlet end of the feedback channel is connected to the wall-mounted oscillation cavity, and the outlet end is connected to the jet channel;

[0012] The feedback channel is provided with two feedback outlets, both of which are connected to the jet channel; the two feedback outlets are a first feedback port and a second feedback port, respectively, with the first feedback port located between the jet channel and the second feedback port; a mechanical feedback component is installed in the second feedback port.

[0013] By adopting the above technical solution, fluid flows into the fluid inlet on the main body. The fluid flows at high speed through the jet channel, generating axial impact force. Fluid in the wall-attached oscillation chamber enters the feedback channel. When fluid flows through the jet channel at a certain rate, the fluid entering the feedback channel disturbs the fluid in the jet channel, causing a wall-attachment effect within the wall-attached oscillation chamber. Under the entrainment effect of the wall-attachment effect, the flow rates at the first and second outlets change, and the fluid is intermittently ejected from the first and second outlets, generating radial impact force and a high-frequency impact torque relative to the center. The axial impact force and radial torque achieve multi-dimensional impact, thereby improving drilling efficiency. The dual feedback consists of two parts: fluid feedback and mechanical feedback. Fluid feedback refers to the feedback caused by the fluid in the feedback channel to the inlet fluid. Mechanical feedback refers to the mechanical device, under the action of fluid pressure, sliding a square slider with wedges into the wall-attached oscillation chamber, thus causing feedback to the inlet fluid. Fluid feedback and mechanical feedback together achieve the dual feedback effect.

[0014] Optionally, a wedge protrudes from the wall of the attached oscillation cavity; the tip of the wedge faces the jet channel and is aligned with the center of the jet channel; the wedge is located at the middle position between the first outlet and the second outlet.

[0015] By adopting the above technical solution, the wedge splits the fluid. Under the guidance of the wedge, part of the fluid entering the wall-mounted oscillating cavity enters the first outlet, and the other part enters the second outlet.

[0016] Optionally, the height of the wedge arrangement is higher than the inlet end of the feedback channel.

[0017] By adopting the above technical solution, it is easier for the fluid diverted through the feedback channel to enter the feedback channel.

[0018] Optionally, two feedback channels are provided, which are arranged symmetrically on both sides of the attached wall oscillation cavity.

[0019] Optionally, the feedback channel is provided with two feedback outlets, both of which are connected to the jet channel.

[0020] Optionally, the fluid inlet cross-section is tapered, and the outer aperture is larger than the inner aperture.

[0021] Optionally, the overall cross-section of the attached wall oscillation cavity is conical, the attached wall oscillation cavity is connected to the jet channel, and the aperture of the side of the attached wall oscillation cavity connected to the jet channel is larger than that of the other side.

[0022] Optionally, the cross-section of the jet channel is rectangular.

[0023] Optionally, the two feedback outlets are a first feedback port and a second feedback port, with the first feedback port located between the jet channel and the second feedback port; a mechanical feedback component is installed in the second feedback port.

[0024] The mechanical feedback assembly includes an inner slider, an outer slider, a connecting rod connecting the inner slider and the outer slider, and a spring sleeved on the connecting rod; the volume of the inner slider is larger than that of the outer slider.

[0025] The second feedback port has a first mounting groove, the inner slider is slidably installed in the first mounting groove and is inserted into the first mounting groove, and the outer slider is installed in the second feedback port. The position of the outer slider is located on the side where the second feedback port is connected to the attached wall oscillation cavity.

[0026] The connecting rod passes through the second feedback port, and a second mounting groove is provided in the second feedback port. The spring is arranged in the second mounting groove within the groove of the first mounting groove.

[0027] When the mechanical feedback assembly is installed in the second feedback port, the inner slider is installed in the first mounting groove with a gap between it and the bottom of the first mounting groove. The spring is in a balanced state, and the outer slider is arranged in the port of the second feedback port facing the wall-mounted oscillation cavity.

[0028] Optionally, both the inner and outer sliders are square sliders, with one side of the outer slider having a bevel.

[0029] The beneficial effects of this invention are:

[0030] This invention provides a dual-feedback multidimensional impactor that cleverly utilizes the wall-attachment effect. When fluid flows through the jet channel at a certain rate, two feedback channels agitate the fluid, causing a wall-attachment effect within the wall-attachment oscillation chamber. This alters the flow rates at the first and second outlets of the dual-feedback multidimensional impactor, resulting in radial impact through periodic oscillation. Axial impact is generated when fluid flows through the jet channel at a certain rate, thus achieving a multidimensional impact effect. The dual feedback consists of two parts: fluid feedback and mechanical feedback. Fluid feedback refers to the feedback from the fluid in the feedback channel to the inlet fluid. Mechanical feedback refers to the mechanical device, under fluid pressure, sliding a wedge-shaped square slider into the wall-attachment oscillation chamber, thereby providing feedback to the inlet fluid. The fluid and mechanical feedback work together to achieve the dual-feedback effect. Attached Figure Description

[0031] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0032] Figure 1 This is a schematic diagram of the dual-feedback multidimensional impactor installed inside the drill bit in this embodiment;

[0033] Figure 2 This is a schematic diagram of the dual-feedback multidimensional impactor in this embodiment;

[0034] Figure 3 for Figure 2 Sectional view at point AA;

[0035] Figure 4 This is a schematic diagram of the mechanical feedback component in this embodiment;

[0036] Figure 5 This is a schematic diagram showing the state A when the dual-feedback multidimensional impactor is in use in this embodiment;

[0037] Figure 6 This is a schematic diagram of the state B when the dual-feedback multidimensional impactor is used in this embodiment.

[0038] Explanation of reference numerals in the attached drawings: 1. Main body; 11. Key; 12. Wedge; 2. Fluid channel; 21. Fluid inlet; 22. Jet channel; 23. Attached oscillation cavity; 24. First outlet; 25. Second outlet; 26. Feedback channel; 261. First feedback port; 262. Second feedback port; 263. First mounting slot; 264. Second mounting slot; 3. Mechanical feedback assembly; 31. Inner slider; 32. Outer slider; 33. Connecting rod; 34. Spring. Detailed Implementation

[0039] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0040] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0041] This invention provides a dual-feedback multidimensional impactor, with reference to Figure 1 , Figure 2The dual-feedback multidimensional impactor includes a main body 1 and a fluid channel 2 disposed in the main body 1. Fluid enters the fluid channel 2 in the main body 1 and is discharged radially from the main body 1. The fluid entering the fluid channel 2 generates an axial impact, so that the dual-feedback multidimensional impactor can generate both axial and radial impacts, thereby improving work efficiency.

[0042] Reference Figure 2 , Figure 3 The main body 1 is built into the drill bit. The main body 1 is cylindrical. A key 11 is protruding on one side of the main body 1. When the main body 1 is installed inside the drill bit, the key 11 is located on the lower side of the main body 1 and is locked onto the drill bit, thus firmly installing the main body 1 on the drill bit.

[0043] The fluid channel 2 includes a fluid inlet 21 located on one side of the main body 1, with the fluid inlet 21 and key 11 arranged on both sides of the main body 1. The fluid inlet 21 has a tapered cross-section, with the outer aperture larger than the inner aperture. A jet channel 22 is connected to the inner side of the fluid inlet 21. The jet channel 22 is located inside the main body 1 and communicates with the smaller aperture of the fluid inlet 21. The jet channel 22 has a rectangular cross-section. Fluid flows into the fluid channel 2 through the fluid inlet 21 and then into the jet channel 22 through the fluid channel 2.

[0044] An attached wall oscillation cavity 23 is formed inside the main body 1. The overall cross-section of the attached wall oscillation cavity 23 is conical. The attached wall oscillation cavity 23 is connected to the jet channel 22, and the aperture of the side of the attached wall oscillation cavity 23 connected to the jet channel 22 is larger than that of the other side. Fluid flows into the attached wall oscillation cavity 23 through the jet channel 22.

[0045] Reference Figure 3 The main body 1 has a first outlet 24 and a second outlet 25, which are respectively arranged on both sides of the main body 1. The cross-sections of the first outlet 24 and the second outlet 25 are rectangular and perpendicular to the axis of the main body 1, and are arranged radially along the main body 1. The first outlet 24 and the second outlet 25 are connected to the wall-mounted oscillation cavity 23, and the fluid flowing into the wall-mounted oscillation cavity 23 flows out through the first outlet 24 and the second outlet 25.

[0046] Reference Figure 2 , Figure 4 A feedback channel 26 is provided on the main body 1. The inlet end of the feedback channel 26 is connected to the wall-mounted oscillation cavity 23, and the outlet end is connected to the jet channel 22. There are two feedback channels 26, which are arranged symmetrically on both sides of the wall-mounted oscillation cavity 23.

[0047] The feedback channel 26 has two feedback outlets, both of which are connected to the jet channel 22. The two feedback outlets are a first feedback port 261 and a second feedback port 262, with the first feedback port 261 located close to the jet channel 22. A mechanical feedback assembly 3 is installed in the second feedback port 262.

[0048] The mechanical feedback assembly 3 includes an inner slider 31, an outer slider 32, a connecting rod 33 connecting the inner slider 31 and the outer slider 32, and a spring 34 sleeved on the connecting rod 33. Both the inner slider 31 and the outer slider 32 are square sliders, with the inner slider 31 having a larger volume than the outer slider 32. One side of the outer slider 32 has an angled edge. When the mechanical feedback assembly 3 is installed in the second feedback port 262, a first mounting groove 263 is provided in the second feedback port 262. The inner slider 31 is slidably installed in the first mounting groove 263 and is inserted into it. The outer slider 32 is installed in the second feedback port 262, positioned on the side where the second feedback port 262 connects to the wall-mounted oscillation cavity 23. The connecting rod 33 passes through the second feedback port 262, and a second mounting groove 264 is provided in the second feedback port 262. The second mounting groove 264 is located within the groove of the first mounting groove 263, and the spring 34 is arranged in the second mounting groove 264. When the mechanical feedback assembly 3 is installed in the second feedback port 262, the inner slider 31 is installed in the first mounting groove 263 with a gap between it and the bottom of the groove. The spring 34 is in a balanced state, and the outer slider 32 is arranged in the port of the second feedback port 262 facing the wall-mounted oscillation cavity 23. When fluid enters the feedback channel 26, the fluid pushes the inner slider 31, causing it to move towards the outer slider 32 and compress the spring 34. This allows the outer slider 32 to enter the wall-mounted oscillation cavity 23 from the feedback channel 26, blocking and guiding the fluid. When the inner slider 31 loses fluid pressure or the pressure decreases, the spring 34 pushes the inner slider 31 in the opposite direction and pulls the outer slider 32 back into the second feedback port 262.

[0049] A wedge 12 protrudes from the wall of the attached wall oscillation chamber 23. The wedge 12 has a triangular cross-section, and its tip faces the jet channel 22 and is aligned with the center of the jet channel 22. The wedge 12 is positioned between the first outlet 24 and the second outlet 25 to divert the fluid. Under the diversion and guidance of the wedge 12, part of the fluid entering the attached wall oscillation chamber 23 enters the first outlet 24, and the other part enters the second outlet 25.

[0050] Moreover, the height of the wedge 12 is higher than the inlet end of the feedback channel 26, making it easier for the fluid diverted through the feedback channel 26 to enter the feedback channel 26.

[0051] In this embodiment, the fluid is drilling fluid. The fluid inlet 21, jet channel 22, wall-attached oscillation chamber 23, and feedback channel 26 are arranged along the axial direction of the main body 1, while the first outlet 24 and the second outlet 25 are arranged radially along the main body 1. The fluid inlet 21, the first outlet 24, and the second outlet 25 are connected to the outside of the main body 1.

[0052] The working principle of the dual-feedback multidimensional impactor disclosed in this application embodiment is as follows: Fluid flows into the fluid inlet 21 on the main body 1. The fluid flows at high speed through the jet channel 22, generating axial impact force. When the fluid passes through the jet channel 22, it generates axial impact. The fluid in the wall-attached oscillation chamber 23 enters the feedback channel 26. When the fluid flows through the jet channel 22 at a certain rate, the fluid entering the feedback channel 26 disturbs the fluid in the jet channel 22, causing the fluid to have a wall-attached effect in the wall-attached oscillation chamber 23. Under the entrainment effect of the wall-attached effect, the flow rates of the first outlet 24 and the second outlet 25 change. The fluid is intermittently ejected from the first outlet 24 and the second outlet 25 alternately, generating radial impact force and high-frequency impact torque relative to the center. The axial impact force and radial torque achieve multidimensional impact, thereby improving drilling efficiency.

[0053] In this process, the fluid exerts pressure on the inner slider 31, causing it to shift. Simultaneously, the spring 34 is compressed, pushing the outer slider 32 into the wall-mounted oscillation chamber 23, thus achieving mechanical feedback. When the pressure exerted by the fluid on the inner slider 31 decreases, the compressed spring 34 returns to its original state, thereby generating a thrust on the inner slider 31, and the outer slider 32 is pulled back.

[0054] Reference Figure 5 , Figure 6 Under the influence of the wall adhesion effect, the system transitions from the normal state to state A. Due to fluid and mechanical feedback, more fluid within the cavity gradually shifts to the other end, switching to state B. In state B, the fluid flow rate in the feedback channel is greater, generating pressure on the inner slider 31, causing it to displace. Simultaneously, the spring 34 is compressed, pushing the outer slider 32 into the cavity, thus achieving mechanical feedback. Fluid flow through the feedback channel provides feedback to the fluid at the inlet, achieving fluid feedback. As more fluid within the cavity gradually shifts to the other end, switching back to state A, the pressure on the inner slider 31 decreases, causing the compressed spring 34 to return to its original state, thus generating a thrust on the inner slider 31, pulling the outer slider 32 back.

[0055] This invention provides a dual-feedback multidimensional impactor that cleverly utilizes the wall-attachment effect. When fluid flows through the jet channel 22 at a certain rate, the two feedback channels 26 agitate the fluid in the jet channel 22, causing the fluid to exhibit a wall-attachment effect within the wall-attachment oscillation chamber 23. This alters the flow rates at the first outlet 24 and the second outlet 25 of the dual-feedback multidimensional impactor, resulting in radial impact through periodic oscillation. Axial impact is also generated when the fluid flows through the jet channel 22 at a certain rate, thus achieving a multidimensional impact effect.

[0056] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent in such process, method, article, or apparatus / device.

[0057] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A dual-feedback multidimensional impactor, characterized in that: It includes a main body (1) and a fluid channel (2) disposed in the main body (1); The main body (1) is arranged inside the drill bit; The fluid channel (2) includes a fluid inlet (21) opened on one side of the main body (1), a jet channel (22) opened inside the main body (1) and communicating with the fluid inlet (21), a wall-mounted oscillation cavity (23) opened inside the main body (1) and communicating with the jet channel (22), a first outlet (24) and a second outlet (25) opened on the main body (1) and communicating with the wall-mounted oscillation cavity (23), and a feedback channel (26) opened inside the main body (1) and communicating with the wall-mounted oscillation cavity (23) and the jet channel (22) at both ends respectively; The fluid inlet (21), jet channel (22), wall-mounted oscillation cavity (23), and feedback channel (26) are arranged along the axial direction of the main body (1), and the first outlet (24) and the second outlet (25) are arranged along the radial direction of the main body (1). The fluid inlet (21), the first outlet (24), and the second outlet (25) are connected to the outside of the main body (1); The inlet end of the feedback channel (26) is connected to the wall-mounted oscillation cavity (23), and the outlet end is connected to the jet channel (22). The feedback channel (26) is provided with two feedback outlets, both of which are connected to the jet channel (22). The two feedback outlets are a first feedback port (261) and a second feedback port (262), respectively. The first feedback port (261) is located between the jet channel (22) and the second feedback port (262). A mechanical feedback component (3) is installed in the second feedback port (262).

2. The dual-feedback multidimensional impactor according to claim 1, characterized in that: The wall of the attached oscillating cavity (23) is provided with a wedge (12) protruding from the cavity wall; the tip of the wedge (12) faces the jet channel (22) and is aligned with the center of the jet channel (22); the wedge (12) is located at the middle position between the first outlet (24) and the second outlet (25).

3. The dual-feedback multidimensional impactor according to claim 2, characterized in that: The wedge (12) is arranged at a height higher than the inlet end of the feedback channel (26).

4. The dual-feedback multidimensional impactor according to claim 1, characterized in that: There are two feedback channels (26), which are arranged on both sides of the attached wall oscillation cavity (23) and are symmetrically arranged.

5. The dual-feedback multidimensional impactor according to claim 1, characterized in that: The fluid inlet (21) has a tapered cross section, and the outer diameter is larger than the inner diameter.

6. The dual-feedback multidimensional impactor according to claim 1, characterized in that: The wall-mounted oscillating cavity (23) has a tapered cross section. The wall-mounted oscillating cavity (23) is connected to the jet channel (22), and the aperture of the side of the wall-mounted oscillating cavity (23) connected to the jet channel (22) is larger than that of the other side.

7. The dual-feedback multidimensional impactor according to claim 1, characterized in that: The cross-section of the jet channel (22) is rectangular.

8. The dual-feedback multidimensional impactor according to claim 1, characterized in that: The mechanical feedback component (3) includes an inner slider (31), an outer slider (32), a connecting rod (33) connecting the inner slider (31) and the outer slider (32) together, and a spring (34) sleeved on the connecting rod (33); the volume of the inner slider (31) is larger than that of the outer slider (32); The second feedback port (262) is provided with a first mounting groove (263), the inner slider (31) is slidably installed in the first mounting groove (263) and is inserted into the first mounting groove (263), and the outer slider (32) is installed in the second feedback port (262), and the position of the outer slider (32) is located on the side where the second feedback port (262) is connected to the wall-mounted oscillation cavity (23); The connecting rod (33) passes through the second feedback port (262), and a second mounting groove (264) is provided in the second feedback port (262). The second mounting groove (264) is located in the groove of the first mounting groove (263), and the spring (34) is arranged in the second mounting groove (264). When the mechanical feedback assembly (3) is installed in the second feedback port (262), the inner slider (31) is installed in the first mounting groove (263) with a gap between it and the bottom of the first mounting groove (263), the spring (34) is in a balanced state, and the outer slider (32) is arranged in the port of the second feedback port (262) facing the wall-mounted oscillation cavity (23).

9. The dual-feedback multidimensional impactor according to claim 8, characterized in that: Both the inner slider (31) and the outer slider (32) are square sliders, and one side of the outer slider (32) has a bevel.

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