High-speed continuous wave pulser for petroleum drilling

Abstract

The invention relates to the field of petroleum drilling equipment, in particular to a high-speed continuous wave pulser for petroleum drilling, which comprises a pulse generating device shell sleeve, a transmission shaft, a rotor valve plate and a stator valve plate, the transmission shaft, the rotor valve plate and the stator valve plate are mounted on the inner side of the pulse generating device shell sleeve, and a first slurry passing hole and a second slurry passing hole are correspondingly formed in the rotor valve plate and the stator valve plate respectively. The rotor valve plate and the transmission shaft are coaxially fixed, the stator valve plate is fixed to the inner wall of the pulse generating device shell sleeve, and the stator valve plate is located on the side, away from the slurry output direction, of the rotor valve plate and is in sliding fit with the rotor valve plate; a valve type filtering structure used for filtering sand particles is arranged on the side, away from the rotor valve plate, of the stator valve plate. Compared with an existing high-speed continuous wave pulser for petroleum drilling, the high-speed continuous wave pulser has the advantages of being capable of preventing gravel particles with large particle sizes in slurry from abrading the edge of a valve hole of a rotary valve, and therefore the service life of the rotary valve is prolonged.

Description

Technical Field

[0001] This invention relates to the field of oil drilling equipment, and in particular to a high-speed continuous wave pulser for oil drilling. Background Technology

[0002] In the field of oilfield logging-while-drilling (LWD), measured drilling and formation parameters are used to adjust the drill bit trajectory in a timely manner, ensuring it drills along the target formation. Furthermore, the formation parameters obtained from LWD closely approximate the original state of the formation, making it more advantageous for evaluating the oil and gas content of complex formations. During operation, high-pressure drilling fluid passes through the continuous wave mud pulse generator. The rotary valves in various components bear significant pressure, making them prone to damage and affecting the overall service life of the mud pulse generator. Therefore, it is necessary to redesign the relevant components inside the continuous wave mud pulse generator to achieve a more balanced distribution among the components and reduce the pressure at the rotary valves.

[0003] For example, the specification of patent publication number CN103015989B discloses a downhole continuous wave mud pulse generator. The downhole continuous wave mud pulse generator includes a continuous wave pulse generating component and a driving component for driving the continuous wave generating component. The continuous wave pulse generating component includes a housing, a stator and a rotor that can rotate axially around the axial direction of the housing, arranged sequentially from top to bottom inside the housing. Mud flow holes are provided on the stator and rotor along the axial direction of the housing. An end cap is provided at the upper end of the housing. A through hole for mud to pass through is provided on the end cap. The mud flow holes on the stator communicate with the through holes on the end cap. The flow holes on the rotor communicate with the side openings of the housing. The driving component drives the rotor to rotate.

[0004] Based on the above search and combined with existing technology, it was found that in the process of rotating the rotary valve of the existing high-speed continuous wave pulser for oil drilling to control the on and off of the mud, a shear force is generated on the mud. Since the mud contains sand and gravel particles with large diameters, it is easy to cause wear on the valve orifice edge of the rotary valve, resulting in a shortened service life of the rotary valve. Therefore, a high-speed continuous wave pulser for oil drilling is proposed to improve the above problems. Summary of the Invention

[0005] In order to solve the problem in the prior art that the valve bore edge of the rotary valve is worn due to the presence of large-diameter sand and gravel particles in the drilling mud, which leads to a shortened service life of the rotary valve, this application provides a high-speed continuous wave pulser for oil drilling.

[0006] To achieve the above-mentioned technical effects, the technical solution of this application is as follows: A high-speed continuous wave pulse generator for oil drilling includes a pulse generator housing, and a drive shaft, a rotor valve plate, and a stator valve plate installed inside the pulse generator housing. The rotor valve plate and the stator valve plate are respectively provided with a first mud passage hole and a second mud passage hole. The rotor valve plate is coaxially fixed with the drive shaft, and the stator valve plate is fixed on the inner wall of the pulse generator housing. The stator valve plate is located on the side of the rotor valve plate away from the mud output direction and slides against the rotor valve plate. A valve-type filter structure for filtering sand and gravel particles is provided on the side of the stator valve plate away from the rotor valve plate.

[0007] Furthermore, the valve-type filter structure includes a filter screen and a sand collection sleeve. The filter screen is coaxially fixed with the drive shaft, and the circumferential side of the filter screen slides against the inner wall of the pulse generator housing. The filter screen is provided with a sand collection through hole corresponding to the first slurry passage hole. The sand collection sleeve is fixed at the sand collection through hole and slides against the surface of the stator valve plate.

[0008] The working principle is as follows: As the filter screen rotates synchronously with the drive shaft and rotor valve plate, the smaller particles in the mud pass through the filter screen, while the larger particles are trapped in the sand collecting sleeve. As the overlap between the first slurry passage hole on the rotor valve plate and the second slurry passage hole on the stator valve plate increases, the conduction area between the sand collecting sleeve and the second slurry passage hole gradually increases, and both the smaller and larger particles in the mud pass through the first slurry passage hole. As the overlap between the first slurry passage hole on the rotor valve plate and the second slurry passage hole on the stator valve plate decreases, the conductive area between the sand collecting sleeve and the first slurry passage hole gradually decreases. Before the first slurry passage hole on the rotor valve plate and the second slurry passage hole on the stator valve plate are completely misaligned, the conductive area between the sand collecting sleeve and the second slurry passage hole is zero. Larger particles in the slurry cannot continue to pass through the second slurry passage hole, while smaller particles in the slurry continue to pass through both the second and first slurry passage holes.

[0009] Furthermore, the length of the sand collecting through hole along its circumference is less than the length of the first slurry passage hole along its circumference, and the side of the sand collecting through hole near the rotation direction is vertically aligned with the side of the rotor valve plate near the rotation direction; before the first slurry passage hole on the rotor valve plate and the second slurry passage hole on the stator valve plate are completely misaligned, the conductive area between the sand collecting sleeve and the second slurry passage hole is zero.

[0010] Furthermore, a notch is provided at the end of the sand collecting sleeve away from the filter screen plate, and a movable plate is installed at the notch by a torsion spring. The movable plate is located on the side of the sand collecting sleeve facing its rotation direction.

[0011] Furthermore, notches are provided on both ends of the sand collecting sleeve perpendicular to its rotation path, and movable plates are installed at the notches on both sides of the sand collecting sleeve by torsion springs.

[0012] Furthermore, a clearing component is provided on the side of the filter screen away from the stator valve plate. The clearing component is fixed on the inner wall of the pulse generator housing and is in contact with the surface of the filter screen.

[0013] Furthermore, the unblocking component includes a fixing structure and unblocking parts. The fixing structure is fixed to the inner wall of the pulse generator housing. Multiple unblocking parts are provided and are installed equidistantly on the fixing structure, and are adapted to the filter holes of the filter screen.

[0014] Furthermore, the fixing structure includes a fixing seat, a mounting seat, and an elastic connector; the fixing seat is fixed to the inner wall of the pulse generator housing, and the side end of the fixing seat near the filter screen is provided with a sliding mounting groove that is adapted to the mounting seat. The mounting seat is fixed to the inner wall of the sliding mounting groove through the elastic connector, and multiple unblocking parts are installed at equal intervals along the length direction of the mounting seat at the side end of the mounting seat near the filter screen.

[0015] Furthermore, the drain cleaner is spherical, and the end face of the mounting base near the filter screen is provided with a spherical mounting groove for the drain cleaner to be installed movably; the spherical drain cleaner and the filter screen are subject to rolling friction.

[0016] In summary, by setting a filter screen and a sand collecting sleeve on one side of the stator valve plate, the filter screen rotates synchronously with the drive shaft and the rotor valve plate. The smaller particles in the mud pass through the filter screen, while the larger particles are trapped in the sand collecting sleeve. As the overlap between the first slurry passage hole on the rotor valve plate and the second slurry passage hole on the stator valve plate increases, the conduction area between the sand collecting sleeve and the second slurry passage hole gradually increases. Both the smaller and larger particles in the mud pass through the first slurry passage hole. As the overlap between the first slurry passage hole on the rotor valve plate and the second slurry passage hole on the stator valve plate decreases, the conduction area between the sand collecting sleeve and the first slurry passage hole gradually decreases. Before the first slurry passage hole on the rotor valve plate and the second slurry passage hole on the stator valve plate are completely misaligned, the conduction area between the sand collecting sleeve and the second slurry passage hole is zero. Larger particles in the slurry cannot continue to pass through the second slurry passage hole, while smaller particles in the slurry continue to pass through both the second and first slurry passage holes, thereby reducing the wear caused by large-diameter slurry on the valve hole edge during valve closure. In addition, by providing notches at both ends of the sand collecting sleeve perpendicular to its rotation path, and by installing movable plates at the notches on both sides of the sand collecting sleeve via torsion springs, the sand collecting sleeve can avoid the obstruction of mud as it rotates with the filter screen, especially when it approaches or moves away from the second slurry passage hole. By providing a dredging component on the side of the filter screen away from the stator valve plate, the filter screen can be effectively prevented from clogging. Furthermore, the elastic connector ensures the dredging effect while reducing wear on the filter screen. The spherical dredging component and the filter screen experience rolling friction, which further reduces wear on the filter screen.

[0017] This application has the following technical effects: 1. Compared with existing high-speed continuous wave pulse generators for oil drilling, it has the feature of preventing large-diameter sand and gravel particles in the mud from causing wear on the valve orifice edge of the rotary valve, thereby extending the service life of the rotary valve.

[0018] 2. In the high-speed continuous wave pulse generator for oil drilling protected in this application, as the allowable flow between the rotor valve plate and the stator valve plate increases, large-diameter mud particles can pass through. Conversely, as the allowable flow between the rotor valve plate and the stator valve plate decreases, large-diameter mud particles cannot pass through, thereby reducing the wear caused by large-diameter mud particles on the valve orifice edge during valve closure. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall planar structure of this application.

[0020] Figure 2 This is a three-dimensional structural diagram of the rotary valve in this application.

[0021] Figure 3 for Figure 2 A three-dimensional structural diagram of the valve-type filter structure in the middle.

[0022] Figure 4 This is a three-dimensional structural diagram of the valve-type filter structure of this application.

[0023] Figure 5 This is a three-dimensional structural diagram of the unblocking component in this application.

[0024] Figure 6 This is a three-dimensional structural diagram of the unblocking component of this application.

[0025] Figure 7 This is a planar perspective structural diagram of the first slurry passage gradually coinciding with the second slurry passage in this application.

[0026] Figure 8 This is a planar perspective structural diagram of the first and second slurry passages of this application when they are completely overlapped.

[0027] Figure 9 This is a planar perspective structural diagram of the first slurry passage hole gradually offset from the second slurry passage hole in this application.

[0028] In the attached diagram: 1-Pulse generator housing, 2-Drive shaft, 3-Rotor valve plate, 301-First slurry passage hole, 4-Stator valve plate, 401-Second slurry passage hole, 5-Filter screen plate, 501-Sand collection hole, 6-Modible plate, 7-Sand collection sleeve, 8-Dredging component, 81-Fixed seat, 8101-Sliding mounting groove, 82-Mounting seat, 8201-Spherical mounting groove, 83-Dredging component, 84-Elastic connector. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0031] It should be noted that similar labels 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.

[0032] In the description of this application, it should be noted that the terms "upper," "vertical," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are used 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, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0033] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0034] Example 1 like Figures 1-4 As shown, a high-speed continuous wave pulse generator for oil drilling includes a pulse generator housing 1, and a drive shaft 2, a rotor valve plate 3, and a stator valve plate 4 installed inside the pulse generator housing 1. The rotor valve plate 3 and the stator valve plate 4 are respectively provided with a first mud passage hole 301 and a second mud passage hole 401. The rotor valve plate 3 is coaxially fixed with the drive shaft 2, and the stator valve plate 4 is fixed on the inner wall of the pulse generator housing 1. The stator valve plate 4 is located on the side of the rotor valve plate 3 away from the mud output direction and slides against the rotor valve plate 3. A valve-type filter structure for filtering sand and gravel particles is provided on the side of the stator valve plate 4 away from the rotor valve plate 3.

[0035] The valve-type filter structure includes a filter screen plate 5 and a sand collection sleeve 7. The filter screen plate 5 is coaxially fixed with the drive shaft 2, and the circumferential side of the filter screen plate 5 slides against the inner wall of the pulse generator housing 1. The filter screen plate 5 is provided with a sand collection through hole 501 corresponding to the first slurry passage hole 301. The sand collection sleeve 7 is fixed at the sand collection through hole 501 and slides against the surface of the stator valve plate 4.

[0036] As the drive shaft 2 and rotor valve plate 3 rotate synchronously, the smaller particles in the mud pass through the filter screen plate 5, while the larger particles are trapped in the sand collecting sleeve 7. As the overlap between the first slurry passage hole 301 on the rotor valve plate 3 and the second slurry passage hole 401 on the stator valve plate 4 increases, the conduction area between the sand collecting sleeve 7 and the second slurry passage hole 401 gradually increases, and both the smaller and larger particles in the mud pass through the first slurry passage hole 301. As the overlap between the first slurry passage hole 301 on the rotor valve plate 3 and the second slurry passage hole 401 on the stator valve plate 4 decreases, the conductive area between the sand collecting sleeve 7 and the first slurry passage hole 301 gradually decreases. Before the first slurry passage hole 301 on the rotor valve plate 3 and the second slurry passage hole 401 on the stator valve plate 4 are completely misaligned, the conductive area between the sand collecting sleeve 7 and the second slurry passage hole 401 is zero. The larger particles in the slurry cannot continue to pass through the second slurry passage hole 401, while the smaller particles in the slurry continue to pass through both the second slurry passage hole 401 and the first slurry passage hole 301.

[0037] Example 2 like Figures 1-9As shown, a high-speed continuous wave pulse generator for oil drilling includes a pulse generator housing 1, and a drive shaft 2, a rotor valve plate 3, and a stator valve plate 4 installed inside the pulse generator housing 1. The rotor valve plate 3 and the stator valve plate 4 are respectively provided with a first mud passage hole 301 and a second mud passage hole 401. The rotor valve plate 3 is coaxially fixed with the drive shaft 2, and the stator valve plate 4 is fixed on the inner wall of the pulse generator housing 1. The stator valve plate 4 is located on the side of the rotor valve plate 3 away from the mud output direction and slides against the rotor valve plate 3. A valve-type filter structure for filtering sand and gravel particles is provided on the side of the stator valve plate 4 away from the rotor valve plate 3.

[0038] The valve-type filter structure includes a filter screen plate 5 and a sand collection sleeve 7. The filter screen plate 5 is coaxially fixed with the drive shaft 2, and the circumferential side of the filter screen plate 5 slides against the inner wall of the pulse generator housing 1. The filter screen plate 5 is provided with a sand collection through hole 501 corresponding to the first slurry passage hole 301. The sand collection sleeve 7 is fixed at the sand collection through hole 501 and slides against the surface of the stator valve plate 4.

[0039] As the drive shaft 2 and rotor valve plate 3 rotate synchronously, the smaller particles in the mud pass through the filter screen plate 5, while the larger particles are trapped in the sand collecting sleeve 7. As the overlap between the first slurry passage hole 301 on the rotor valve plate 3 and the second slurry passage hole 401 on the stator valve plate 4 increases, the conduction area between the sand collecting sleeve 7 and the second slurry passage hole 401 gradually increases, and both the smaller and larger particles in the mud pass through the first slurry passage hole 301. As the overlap between the first slurry passage hole 301 on the rotor valve plate 3 and the second slurry passage hole 401 on the stator valve plate 4 decreases, the conductive area between the sand collecting sleeve 7 and the first slurry passage hole 301 gradually decreases. Before the first slurry passage hole 301 on the rotor valve plate 3 and the second slurry passage hole 401 on the stator valve plate 4 are completely misaligned, the conductive area between the sand collecting sleeve 7 and the second slurry passage hole 401 is zero. The larger particles in the slurry cannot continue to pass through the second slurry passage hole 401, while the smaller particles in the slurry continue to pass through both the second slurry passage hole 401 and the first slurry passage hole 301.

[0040] The length of the sand collecting through hole 501 along its circumference is less than the length of the first slurry passage hole 301 along its circumference, and the side of the sand collecting through hole 501 near the rotation direction is vertically aligned with the side of the rotor valve plate 3 near the rotation direction; before the first slurry passage hole 301 on the rotor valve plate 3 and the second slurry passage hole 401 on the stator valve plate 4 are completely misaligned, the conductive area between the sand collecting sleeve 7 and the second slurry passage hole 401 is zero.

[0041] The end of the sand collecting sleeve 7 away from the filter screen plate 5 is provided with a notch, and a movable plate 6 is installed at the notch by a torsion spring. The movable plate 6 is located on the side of the sand collecting sleeve 7 facing its rotation direction. As the sand collecting sleeve 7 rotates with the filter screen plate 5, especially when it is close to the second slurry passage hole 401, it can avoid the obstruction of the mud.

[0042] The sand collecting sleeve 7 has notches on both sides perpendicular to its rotation path, and movable plates 6 are installed at the notches on both sides of the sand collecting sleeve 7 by torsion springs; as the sand collecting sleeve 7 rotates with the filter screen plate 5, especially when it approaches or moves away from the second slurry passage hole 401, it can avoid the obstruction of mud.

[0043] A clogging component 8 is provided on the side of the filter screen plate 5 away from the stator valve plate 4. The clogging component 8 is fixed on the inner wall of the pulse generator housing 1 and fits against the surface of the filter screen plate 5; this can effectively prevent the filter screen plate 5 from clogging.

[0044] The unblocking component 8 includes a fixing structure and unblocking parts 83. The fixing structure is fixed to the inner wall of the pulse generator housing 1. Multiple unblocking parts 83 are provided, and the multiple unblocking parts 83 are installed at equal intervals on the fixing structure and are adapted to the filter holes of the filter screen plate 5.

[0045] The fixing structure includes a fixing seat 81, a mounting seat 82, and an elastic connector 84. The fixing seat 81 is fixed to the inner wall of the pulse generator housing 1. The fixing seat 81 is provided with a sliding mounting groove 8101 that is adapted to the mounting seat 82 at the side end near the filter screen plate 5. The mounting seat 82 is fixed to the inner wall of the sliding mounting groove 8101 through the elastic connector 84. Multiple unblocking parts 83 are installed at equal intervals along the length direction of the mounting seat 82 at the side end of the mounting seat 82 near the filter screen plate 5. The elastic connector 84 ensures the unblocking effect while reducing wear on the filter screen plate 5.

[0046] The unblocking component 83 is spherical, and the mounting base 82 is provided with a spherical mounting groove 8201 on the end face near the filter screen plate 5 for the unblocking component 83 to be movably installed; the spherical unblocking component 83 and the filter screen plate 5 are subject to rolling friction, which can further reduce the wear on the filter screen plate 5.

[0047] By providing notches at both ends of the sand collecting sleeve 7 perpendicular to its rotation path, and by installing movable plates 6 at the notches on both sides of the sand collecting sleeve 7 via torsion springs, the sand collecting sleeve 7 can avoid the obstruction of mud as it rotates with the filter screen plate 5, especially when it approaches or moves away from the second slurry passage hole 401. By providing a dredging component 8 on the side of the filter screen plate 5 away from the stator valve plate 4, the clogging of the filter screen plate 5 can be effectively avoided. Furthermore, the provided elastic connector 84 can ensure the dredging effect while reducing the wear on the filter screen plate 5. The spherical dredging component 83 and the filter screen plate 5 have rolling friction, which can further reduce the wear on the filter screen plate 5.

[0048] Example 3 This invention provides a high-speed continuous wave pulser for oil drilling. Please refer to [link / reference]. Figures 1-9 The device includes a pulse generator housing 1, and a drive shaft 2, a rotor valve plate 3, and a stator valve plate 4 installed inside the pulse generator housing 1. The rotor valve plate 3 and the stator valve plate 4 are respectively provided with a first slurry passage hole 301 and a second slurry passage hole 401. The rotor valve plate 3 is coaxially fixed with the drive shaft 2, and the stator valve plate 4 is fixed on the inner wall of the pulse generator housing 1. The stator valve plate 4 is located on the side of the rotor valve plate 3 away from the slurry output direction and slides against the rotor valve plate 3.

[0049] A valve-type filter structure is provided on the side of the stator valve plate 4 away from the rotor valve plate 3. Specifically, the valve-type filter structure includes a filter screen plate 5 and a sand collecting sleeve 7. The filter screen plate 5 is coaxially fixed with the drive shaft 2, and the circumferential side of the filter screen plate 5 slides against the inner wall of the pulse generator housing 1. The filter screen plate 5 is provided with a sand collecting through hole 501 corresponding to the first slurry passage hole 301. The sand collecting sleeve 7 is fixed at the sand collecting through hole 501 and slides against the surface of the stator valve plate 4, so that: As the drive shaft 2 and rotor valve plate 3 rotate synchronously, the smaller particles in the mud pass through the filter screen plate 5, while the larger particles are trapped in the sand collecting sleeve 7. As the overlap between the first slurry passage hole 301 on the rotor valve plate 3 and the second slurry passage hole 401 on the stator valve plate 4 increases, the conduction area between the sand collecting sleeve 7 and the second slurry passage hole 401 gradually increases, and both the smaller and larger particles in the mud pass through the first slurry passage hole 301. As the overlap between the first slurry passage hole 301 on the rotor valve plate 3 and the second slurry passage hole 401 on the stator valve plate 4 decreases, the conductive area between the sand collecting sleeve 7 and the first slurry passage hole 301 gradually decreases. Before the first slurry passage hole 301 on the rotor valve plate 3 and the second slurry passage hole 401 on the stator valve plate 4 are completely misaligned, the conductive area between the sand collecting sleeve 7 and the second slurry passage hole 401 is zero. The larger particles in the slurry cannot continue to pass through the second slurry passage hole 401, while the smaller particles in the slurry continue to pass through both the second slurry passage hole 401 and the first slurry passage hole 301.

[0050] The high-speed continuous wave pulse generator for oil drilling allows large-diameter mud to pass through as the allowable flow between rotor valve plate 3 and stator valve plate 4 increases, while preventing large-diameter mud from passing through as the allowable flow between rotor valve plate 3 and stator valve plate 4 decreases, thereby reducing the wear caused by large-diameter mud on the valve orifice edge during valve closure.

[0051] Among them, the length of the sand collecting through hole 501 along its circumference is less than the length of the first slurry passage hole 301 along its circumference, and the side of the sand collecting through hole 501 near the rotation direction is vertically aligned with the side of the rotor valve plate 3 near the rotation direction. Before the first slurry passage hole 301 on the rotor valve plate 3 and the second slurry passage hole 401 on the stator valve plate 4 are completely misaligned, the conductive area between the sand collecting sleeve 7 and the second slurry passage hole 401 is zero.

[0052] The sand collecting sleeve 7 has notches on both sides perpendicular to its rotation path, and movable plates 6 are installed at the notches on both sides of the sand collecting sleeve 7 by torsion springs; the sand collecting sleeve 7 can avoid the obstruction of mud when it rotates with the filter screen plate 5, especially when it is close to or away from the second slurry hole 401.

[0053] A clogging component 8 is provided on the side of the filter screen plate 5 away from the stator valve plate 4. The clogging component 8 is fixed to the inner wall of the pulse generator housing 1 and fits against the surface of the filter screen plate 5, effectively preventing clogging of the filter screen plate 5. Specifically, the clogging component 8 includes a fixing structure and clogging parts 83. The fixing structure is fixed to the inner wall of the pulse generator housing 1. Multiple clogging parts 83 are provided and are equidistantly installed on the fixing structure, and are adapted to the filter holes of the filter screen plate 5. The fixing structure includes a fixing seat 81 and a mounting bracket 82. The mounting base 82 and the elastic connector 84 are provided. The fixed base 81 is fixed to the inner wall of the pulse generator housing 1. The side end of the fixed base 81 near the filter screen plate 5 is provided with a sliding mounting groove 8101 that is adapted to the mounting base 82. The mounting base 82 is fixed to the inner wall of the sliding mounting groove 8101 through the elastic connector 84. Multiple unblocking parts 83 are installed at equal intervals along the length direction of the mounting base 82 near the side end of the mounting base 82 near the filter screen plate 5. Through the provided elastic connector 84, the unblocking effect can be ensured while reducing the wear on the filter screen plate 5.

[0054] Furthermore, the unblocking component 83 is spherical, and the mounting base 82 is provided with a spherical mounting groove 8201 on the end face near the filter screen plate 5 for the unblocking component 83 to be movably installed; the spherical unblocking component 83 and the filter screen plate 5 have rolling friction, which can further reduce the wear on the filter screen plate 5.

[0055] Working principle: The filter screen 5 rotates synchronously with the drive shaft 2 and the rotor valve plate 3. Smaller particles in the mud pass through the filter screen 5, while larger particles are trapped in the sand collecting sleeve 7. As the overlap between the first slurry passage hole 301 on the rotor valve plate 3 and the second slurry passage hole 401 on the stator valve plate 4 increases, such as... Figure 7As shown, the conductive area between the sand collecting sleeve 7 and the second slurry passage hole 401 gradually increases, and both the smaller and larger particles in the slurry pass through the first slurry passage hole 301; as the overlap between the first slurry passage hole 301 on the rotor valve plate 3 and the second slurry passage hole 401 on the stator valve plate 4 decreases, as... Figure 9 As shown, the conductive area between the sand collecting sleeve 7 and the first slurry passage hole 301 gradually decreases, and before the first slurry passage hole 301 on the rotor valve plate 3 and the second slurry passage hole 401 on the stator valve plate 4 are completely misaligned, the conductive area between the sand collecting sleeve 7 and the second slurry passage hole 401 is zero. The larger particles in the slurry cannot continue to pass through the second slurry passage hole 401, while the smaller particles in the slurry continue to pass through the second slurry passage hole 401 and the first slurry passage hole 301. Furthermore, as the sand collecting sleeve 7 rotates with the filter screen plate 5, especially when it approaches or moves away from the second slurry passage hole 401, it can avoid the obstruction of the slurry. The unblocking component 8 provided on the side of the filter screen plate 5 away from the stator valve plate 4 can unblock the filter screen plate 5.

[0056] In light of current practical needs, the above-described embodiments adopted in this application are not limited to these. Any changes made within the scope of knowledge possessed by those skilled in the art without departing from the concept of this application still fall within the protection scope of this invention.

Claims

1. A high-speed continuous wave pulse generator for oil drilling, characterized in that: The device includes a pulse generator housing (1) and a drive shaft (2), a rotor valve plate (3), and a stator valve plate (4) installed inside the pulse generator housing (1). The rotor valve plate (3) and the stator valve plate (4) are respectively provided with a first slurry passage hole (301) and a second slurry passage hole (401). The rotor valve plate (3) is fixed coaxially with the drive shaft (2), and the stator valve plate (4) is fixed on the inner wall of the pulse generator housing (1). The stator valve plate (4) is located on the side of the rotor valve plate (3) away from the mud output direction and slides against the rotor valve plate (3). The side of the stator valve plate (4) away from the rotor valve plate (3) is provided with a valve-type filter structure for filtering sand and gravel particles.

2. The high-speed continuous wave pulse generator for oil drilling according to claim 1, characterized in that: The valve-type filter structure includes a filter screen plate (5) and a sand collection sleeve (7). The filter screen plate (5) is coaxially fixed with the drive shaft (2), and the circumferential side of the filter screen plate (5) slides against the inner wall of the pulse generator housing (1). The filter screen plate (5) is provided with a sand collection through hole (501) corresponding to the first slurry passage hole (301). The sand collection sleeve (7) is fixed at the sand collection through hole (501) and slides against the surface of the stator valve plate (4).

3. A high-speed continuous wave pulse generator for oil drilling according to claim 2, characterized in that: As the drive shaft (2) and rotor valve plate (3) rotate synchronously, the smaller particles in the mud pass through the filter screen plate (5), while the larger particles are trapped in the sand collecting sleeve (7). As the overlap between the first slurry passage hole (301) on the rotor valve plate (3) and the second slurry passage hole (401) on the stator valve plate (4) increases, the conduction area of ​​the sand collecting sleeve (7) and the second slurry passage hole (401) gradually increases, and both the smaller and larger particles in the mud pass through the first slurry passage hole (301). As the overlap between the first slurry passage hole (301) on the rotor valve plate (3) and the second slurry passage hole (401) on the stator valve plate (4) decreases, the conduction area between the sand collecting sleeve (7) and the first slurry passage hole (301) gradually decreases. Before the first slurry passage hole (301) on the rotor valve plate (3) and the second slurry passage hole (401) on the stator valve plate (4) are completely misaligned, the conduction area between the sand collecting sleeve (7) and the second slurry passage hole (401) is zero. The larger particle size in the mud cannot continue to pass through the second slurry passage hole (401), while the smaller particle size in the mud continues to pass through the second slurry passage hole (401) and the first slurry passage hole (301).

4. A high-speed continuous wave pulse generator for oil drilling according to claim 2, characterized in that: The length of the sand collection through hole (501) along its circumference is less than the length of the first slurry passage hole (301) along its circumference, and the side of the sand collection through hole (501) near the rotation direction is vertically aligned with the side of the rotor valve plate (3) near the rotation direction; before the first slurry passage hole (301) on the rotor valve plate (3) and the second slurry passage hole (401) on the stator valve plate (4) are completely misaligned, the conductive area between the sand collection sleeve (7) and the second slurry passage hole (401) is zero.

5. A high-speed continuous wave pulse generator for oil drilling according to claim 2, characterized in that: The end of the sand collecting sleeve (7) away from the filter screen (5) is provided with a notch, and a movable plate (6) is installed at the notch by a torsion spring. The movable plate (6) is located on the side of the sand collecting sleeve (7) facing its rotation direction.

6. A high-speed continuous wave pulse generator for oil drilling according to claim 2, characterized in that: The sand collecting sleeve (7) has notches on both sides perpendicular to its rotation path, and movable plates (6) are installed at the notches on both sides of the sand collecting sleeve (7) by torsion springs.

7. A high-speed continuous wave pulse generator for oil drilling according to claim 2, characterized in that: A dredging component (8) is provided on the side of the filter screen (5) away from the stator valve plate (4). The dredging component (8) is fixed on the inner wall of the pulse generator housing (1) and is in contact with the surface of the filter screen (5).

8. A high-speed continuous wave pulse generator for oil drilling according to claim 7, characterized in that: The unblocking component (8) includes a fixing structure and unblocking parts (83). The fixing structure is fixed on the inner wall of the pulse generator housing (1). Multiple unblocking parts (83) are provided, and multiple unblocking parts (83) are installed at equal intervals on the fixing structure and are adapted to the filter holes of the filter screen plate (5).

9. A high-speed continuous wave pulse generator for oil drilling according to claim 8, characterized in that: The fixing structure includes a fixing seat (81), a mounting seat (82), and an elastic connector (84). The fixing seat (81) is fixed to the inner wall of the pulse generator housing (1). The side end of the fixing seat (81) near the filter screen (5) is provided with a sliding mounting groove (8101) that is compatible with the mounting seat (82). The mounting seat (82) is fixed to the inner wall of the sliding mounting groove (8101) through the elastic connector (84). Multiple unblocking parts (83) are installed at equal intervals along the length direction of the mounting seat (82) at the side end of the mounting seat (82) near the filter screen (5).

10. A high-speed continuous wave pulse generator for oil drilling according to claim 1, characterized in that: The unblocking component (83) is spherical, and the mounting base (82) is provided with a spherical mounting groove (8201) on the end face of the filter screen (5) for the unblocking component (83) to be movably installed; the spherical unblocking component (83) and the filter screen (5) are subject to rolling friction.

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