Valve body device resistant to large-displacement erosion and inclinometry tool while drilling

Abstract

The invention provides a large-displacement-erosion-resistant valve body device and a while-drilling inclinometer tool, the valve body device comprises a valve cylinder, a valve seat, a rotor and a stator, the valve seat is connected to the lower end of the valve cylinder, the rotor is arranged in the valve cylinder in a penetrating mode, and the rotor can rotate in the valve cylinder; the rotor comprises a rotating shaft and blades, the rotating shaft penetrates through the valve seat and can rotate, the blades are connected to the rotating shaft, and flow guide grooves and flow guide belts are arranged on the blades; the stator is arranged in the valve cylinder in a penetrating manner and is arranged above the rotor; a first overflowing channel is formed in the stator; a second overflowing channel is formed in the valve seat, drilling fluid can flow through the valve body along the first overflowing channel and the second overflowing channel, the flow guide grooves and the flow guide belts can transfer vortex areas formed at the corners of the second overflowing channel to the middle position so as to reduce erosion, erosion-resistant hard alloy can be additionally installed locally, and the erosion-resistant capacity is improved. According to the invention, the high-displacement erosion resistance can be improved from about 50L / s to 80L / s, and the large-displacement erosion resistance life can be prolonged from 100h by more than 5 times to more than 500-1000h.

Description

Technical Field

[0001] This invention relates to the field of downhole tools technology for oil drilling, and more specifically, to a valve body device and a drilling traction measurement tool that are resistant to high-volume erosion. Background Technology

[0002] As oil and gas exploration and development in Sichuan, Chongqing, and Tarim Basin advances towards deeper and unconventional oil and gas resources, geological and engineering conditions become more complex, and drilling depths and horizontal section lengths continue to increase, posing significant challenges to the smooth implementation of drilling projects. Theoretical and practical experience shows that excellent vertical well trajectory quality is fundamental to wellbore collision prevention, reducing drilling friction torque, lowering the difficulty of subsequent well section construction, and safely and efficiently achieving geological engineering objectives. This is of great significance for reducing the engineering difficulty of complex deep wells and long horizontal well sections.

[0003] Current downhole measurement-while-drilling (MWD) tools often encounter erosion problems under high-displacement conditions. Specifically, the conventional cross-shaped retrieval valve cover structure used in MWD tools typically has low strength, providing only a pull-out force of no more than 2 tons. When the tool is obstructed by foreign objects such as rock cuttings inside the drill string, this cross-shaped structure can be damaged, potentially preventing the tool from being pulled out of the drill string. Furthermore, the conventional valve body structure in MWD tools contains internal... In the event of strong local eddies, when the stator and rotor close together to trigger a pulse signal, the drilling fluid velocity is high on the outer edge of the rotor and is mainly concentrated on both sides. There are 8 eddy concentration points in the valve body, all located at the corners of the valve seat flow passage. These 8 weak points will gradually erode in 80 to 120 hours at high flow rates above 50 L / s until they erode through the valve body and then through the external suspension sub, resulting in no signal. In some cases, the reduced strength of the suspension sub may even lead to downhole accidents such as drill string breakage.

[0004] The upper part of a conventional valve body can be reinforced with a hard alloy ring to improve its erosion resistance. However, the lower part of the valve body is complex and the weak points for erosion are at the corners, making it difficult to reinforce its erosion resistance with hard alloy as a whole (the corners are difficult to machine and are prone to breakage due to vibration). Summary of the Invention

[0005] The purpose of this invention is to address at least one of the aforementioned shortcomings of the prior art. For example, one objective of this invention is to provide a valve body device and a drilling rig that are resistant to large-volume erosion, in order to solve the technical problems in the prior art where eddy current zones are easily generated at the corners of the valve seat flow channel, and where the erosion-resistant alloy block is difficult to process at the corners, thus easily causing erosion of the valve body.

[0006] To achieve the above objectives, the present invention provides a valve body device resistant to high-volume erosion. The valve body device includes a valve cylinder, a valve seat, a rotor, and a stator. The valve seat is fixedly connected to the lower end of the valve cylinder, and the rotor passes through the valve cylinder and can be driven to rotate within the valve cylinder. The rotor includes a shaft and several blades. One end of the shaft passes through the valve seat and is rotatable relative to the valve seat. The several blades are fixedly connected to the other end of the shaft and are evenly distributed circumferentially on the outer side of the shaft. Each blade has several guide grooves at its radially outer end, and the guide grooves are spaced apart from each other. The blades are arranged and distributed circumferentially; each blade has radially arranged guide strips at both sides of its edge; the stator is inserted into the valve cylinder and spaced above the rotor, and several axially penetrating first flow channels are formed in the stator; several axially penetrating second flow channels are formed in the valve seat, and drilling fluid can flow through the valve body device along the first and second flow channels. Several guide grooves and guide strips can transfer the vortex areas formed at the corners of several second flow channels to the middle position of the second flow channels when the rotor rotates, so as to reduce the erosion of the valve seat by the drilling fluid.

[0007] Optionally, a screw hole may be provided in the valve seat between two adjacent second flow channels for fastening the valve seat and the functional module below the valve seat.

[0008] Optionally, a plurality of erosion-resistant blocks may be installed on the inner wall of the valve seat. The plurality of erosion-resistant blocks correspond one-to-one with the plurality of second flow channels and are respectively located in the plurality of second flow channels. The plurality of erosion-resistant blocks can withstand the erosion of the side wall of the valve seat by the eddy current zone in the middle position of the second flow channel, so as to further improve the erosion resistance of the side wall of the valve seat.

[0009] Alternatively, the valve body device may further include a wear-resistant ring, which passes through the valve cylinder, closely adhering to the inner wall of the valve cylinder, and the upper end of the wear-resistant ring is flush with the upper end of the rotor. The wear-resistant ring can improve the erosion resistance of the side wall of the valve cylinder.

[0010] Alternatively, the valve body device may further include a valve cover, which is fixedly connected to the upper end of the valve cylinder. The valve cover can be connected to a retrieval tool on the upper part of the valve body device for retrieving the valve body device from the well.

[0011] Alternatively, the sidewall of the valve cover may be formed with a variable diameter section, which allows the inner diameter of the valve cover to gradually decrease from top to bottom and then gradually increase, so as to form an inner protrusion for axially limiting the salvage tool that extends into the valve cover.

[0012] Alternatively, the side wall of the valve cover may be provided with a plurality of radially penetrating retrieval holes, which can be used to engage the lower end of a retrieval tool to facilitate the retrieval operation of the valve body device.

[0013] Alternatively, the outer walls of the valve cover, valve cylinder, and valve seat may be provided with circumferential sealing grooves, in which sealing rings can be installed to seal the outer side of the valve body assembly.

[0014] Optionally, the number of guide grooves opened on each of the plurality of blades can be three, the three guide grooves are distributed along the circumference of the blade, and each guide groove is opened along the radial direction of the blade and connected to the radial outer end of the blade.

[0015] In another aspect, the present invention provides a drilling directional measurement tool, which may include a valve body device as described above that is resistant to large displacement erosion. The drilling directional measurement tool may also include a drive sub, a measuring sub, and a battery sub connected to the lower end of the valve body device.

[0016] Compared with the prior art, the beneficial effects of the present invention include at least one of the following:

[0017] 1. The valve body device of the present invention removes the "cross-shaped" retrieval structure in the center of the valve cover, leaving a hollow structure in the middle. The opening at the top of the valve cover is formed as a variable diameter section to facilitate the introduction of the lifting retrieval tool. The valve cover has three retrieval holes for connecting with the retrieval tool. The three retrieval holes on the valve cover can provide more than 8 tons of pulling force for the retrieval tool, solving the problem that the tool cannot be pulled out of the drill bit when the valve body is stuck.

[0018] 2. The valve body device of the present invention optimizes the structure of the outer circle edge of the rotor by opening a flow guide groove and adding a flow guide belt, which transfers the high-velocity vortex zone of drilling fluid from the edge corner of the valve seat flow channel to the smooth middle part, thereby facilitating the local addition of erosion-resistant hard alloy and greatly improving the erosion resistance.

[0019] 3. The valve body device of the present invention can increase the resistance to high displacement erosion from about 50L / s to 80L / s, and the service life of high displacement erosion can be increased by more than 5 times from about 100h to more than 500-1000h. Attached Figure Description

[0020] The above and other objects and / or features of the present invention will become clearer from the following description taken in conjunction with the accompanying drawings, in which:

[0021] Figure 1 An assembly cross-sectional view of a valve body device resistant to large-displacement erosion, an exemplary embodiment of the present invention, is shown.

[0022] Figure 2 It shows Figure 1 The cross-sectional view of “AA” in the middle.

[0023] Figure 3 It shows Figure 1 A cross-sectional view of “BB” in the middle.

[0024] Figure 4 A perspective view of the rotor in a valve body device resistant to large displacement erosion according to an exemplary embodiment of the present invention is shown.

[0025] Figure 5 A schematic diagram of a valve cover in a valve body device resistant to high-displacement erosion according to an exemplary embodiment of the present invention is shown.

[0026] Figure 6 A perspective view of a valve body device resistant to large-displacement erosion according to an exemplary embodiment of the present invention is shown.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Valve cylinder, 2. Rotor, 21. Blade, 211. Guide groove, 212. Guide band, 22. Shaft, 3. Valve seat, 31. Second flow passage, 32. Screw hole, 4. Valve cover, 41. Variable diameter section, 42. Retrieval hole, 5. Erosion resistant block, 6. Wear resistant ring, 7. Sealing groove, 8. Stator, 81. First flow passage, a. Vortex zone before flow guidance, b. Vortex zone after flow guidance. Detailed Implementation

[0029] In the following sections, the valve body device and drilling siphon tool resistant to high-volume erosion of the present invention will be described in detail with reference to exemplary embodiments.

[0030] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0031] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0032] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] In related technologies, the conventional "+" shaped retrieval valve cover structure is typically used in MWD tools. This retrieval structure has low strength, providing only a pull-out force of no more than 2 tons. When the tool is obstructed by foreign objects such as rock cuttings inside the drill string, this "+" shaped structure can be damaged, potentially preventing the tool from being pulled out of the drill string. Furthermore, the conventional valve body structure in MWD tools exhibits strong localized eddies. When the stator and rotor close together to trigger a pulse signal, the drilling fluid velocity is high on the outer edge of the rotor, mainly concentrated on both sides. The valve body primarily... There are 8 eddy current concentration points, all located at the corners of the valve seat flow passage. High-pressure drilling fluid will gradually erode the valve body sidewall until it erodes through the valve body, and then erodes through the external suspension section, causing no signal, or even downhole accidents such as drill string breakage due to the decrease in the strength of the suspension section. The upper part of the conventional valve body can improve its erosion resistance by setting a hard alloy ring, but the lower part of the valve body structure is complex and the weak points of erosion are at the corners, making it difficult to strengthen its erosion resistance with hard alloy as a whole (the corners are difficult to process and are prone to breakage due to vibration).

[0034] Based on this, the present invention provides a valve body device and a drilling rig measurement tool resistant to high-volume erosion. The valve body device includes a valve cylinder, a valve seat, and a rotor. The valve seat is fixedly connected to the lower end of the valve cylinder, and the rotor passes through the valve cylinder and can be driven to rotate within the valve cylinder. The rotor includes a rotating shaft and several blades. One end of the rotating shaft is rotatably connected to the valve seat, and the several blades are fixedly connected to the other end of the rotating shaft and are evenly distributed circumferentially on the outer side of the rotating shaft. Each blade has several guide grooves at its radially outer end, and the guide grooves are distributed circumferentially along the blade. Each blade has a guide band radially provided at both sides of its edge. Several axially penetrating second flow channels are formed in the valve seat, and drilling fluid can flow through the valve seat along the second flow channels. The guide grooves and guide bands can transfer the vortex areas formed at the corners of the several second flow channels to the middle position of the second flow channels when the rotor rotates, thereby reducing the erosion of the valve seat by the drilling fluid.

[0035] The valve body device of this invention completely removes the "cross-shaped" retrieval structure at the center of the valve cover, resulting in a hollow structure in the middle. The upper opening of the valve cover is formed into a variable diameter section, facilitating the introduction and lifting of retrieval tools. The valve cover has three retrieval holes for connecting with the retrieval tools. These three retrieval holes can provide a pulling force of over 8 tons for the retrieval tools, solving the problem of tools being unable to be pulled out of the drill string when the valve body is jammed. The valve body device of this invention optimizes the structure of the outer edge of the rotor by creating a guide groove and adding a guide belt, shifting the high-velocity vortex zone of the drilling fluid from the edge corner of the valve seat flow channel to the smooth center, thus facilitating the local addition of erosion-resistant hard alloy and significantly improving erosion resistance. The valve body device of this invention can increase the high-displacement erosion resistance from about 50L / s to 80L / s, and the high-displacement erosion resistance life can be increased by more than 5 times from about 100 hours to over 500-1000 hours.

[0036] Exemplary Example 1

[0037] This exemplary embodiment provides a valve body device resistant to high-displacement erosion.

[0038] Figure 1 An assembly cross-sectional view of a valve body device resistant to large-displacement erosion according to an exemplary embodiment of the present invention is shown. Figure 2 It shows Figure 1 Cross-sectional view of "AA" in the middle; Figure 3 It shows Figure 1 A cross-sectional view of "BB" in the middle; Figure 4 A perspective view of the rotor in a valve body device resistant to large displacement erosion according to an exemplary embodiment of the present invention is shown. Figure 5 A schematic diagram of a valve cover in a valve body device resistant to large displacement erosion according to an exemplary embodiment of the present invention is shown. Figure 6 A perspective view of a valve body device resistant to large-displacement erosion according to an exemplary embodiment of the present invention is shown.

[0039] like Figures 1 to 6 As shown in the exemplary embodiment, the valve body device resistant to large-volume erosion may include a valve cylinder 1, a rotor 2, a valve seat 3, and a stator 8. The valve seat 3 can be integrally formed and fixedly connected to the lower end of the valve cylinder 1. The rotor 2 can be inserted into the valve cylinder 1 and rotatably connected to the valve seat 3. The rotor 2 can be driven to rotate within the valve cylinder 1. The rotor 2 may include blades 21 and a rotating shaft 22. The lower end of the rotating shaft 22 can pass through the valve seat 3 and rotate relative to the valve seat 3. Here, the lower end of the rotating shaft 22 can be connected to a drive section below the valve body device and rotate under the drive of the drive section, so that the entire rotor 2 can rotate within the valve cylinder 1 under the drive of the drive section. However, the present invention is not limited to this. The connection method between the valve seat 3 and the valve cylinder 1 may also be other than integral forming, such as welding, threaded connection, etc. The present invention does not specifically limit this.

[0040] Optionally, the rotor 2 may include multiple blades 21. Specifically, the number of blades 21 may be four. The four blades 21 may be connected by a key and sleeved on the upper end of the rotating shaft 22. The four blades 21 may be evenly distributed on the outer side of the rotating shaft 22 along the circumference of the rotating shaft 22. The four blades 21 may rotate with the rotation of the rotating shaft 22. During the operation of the valve body device, high-pressure drilling fluid may be introduced into the valve cylinder 1 from top to bottom. The rotation of the rotor 2 in the valve cylinder 1 may generate a pressure pulse signal, thereby enabling the transmission of downhole measurement parameters.

[0041] Each blade 21 may have multiple guide grooves 211 formed at its radially outer end. Here, the number of guide grooves 211 formed on the blade 21 can be three. Each of the three guide grooves 211 can be formed radially along the blade 21, and one end of each guide groove 211 can be connected to the radially outer end of the blade 21. The three guide grooves 211 can be spaced apart from each other and distributed circumferentially along the blade 21. A guide band 212 is also provided on the blade 21. The guide band 212 can be set at the edges on both sides of the blade 21. That is, each blade 21 may be provided with two guide strips 212, and the two guide strips 212 may be located at the two side edges of the blade 21 respectively. The guide strips 212 and the blade 21 may be fixedly connected by integral molding. However, the present invention is not limited to this. The number of blades 21 in the rotor 2, the connection method between the blades 21 and the rotating shaft 22, and the number and position of the guide grooves 211 and guide strips 212 provided on the blades 21 can be arbitrarily selected according to actual needs. The present invention does not make specific limitations in this regard.

[0042] Optionally, the stator 8 is installed in the valve cylinder 1 and spaced above the rotor 2. The stator 8 has multiple axially penetrating first flow channels 81; the valve seat 3 has multiple axially penetrating second flow channels 31. Here, the number of first flow channels 81 and second flow channels 31 can both be four. The four first flow channels 81 can be evenly distributed in the stator 8 along the circumference of the stator 8, and the four second flow channels 31 can be evenly distributed in the valve seat 3 along the circumference of the valve seat 3. Drilling fluid can flow in the valve body device along the four first flow channels 81 and the four second flow channels 31.

[0043] In conventional valve body structures, the conventional rotor structure allows drilling fluid to form a vortex zone at the corners of the second flow channel 31 as it flows through it. For example... Figure 3As shown, each second flow channel 31 has two pre-guided vortex zones a. The drilling fluid velocity in the pre-guided vortex zone a is the highest, and the local pressure can also reach the maximum, which can cause significant erosion to the structure at the corners of the valve seat 3. It is very difficult to process erosion-resistant materials on the valve seat at the corners of the second flow channel 31, so it is difficult to protect the valve seat material at this location from erosion. However, after setting guide grooves 211 and guide bands 212 on the blades 21 of the rotor 2, the rotor 2 can change the flow direction of the drilling fluid passing through the rotor 2 during rotation, which can change the position of the vortex zone formed by the drilling fluid in the second flow channel 31. Specifically, for example... Figure 3 As shown in the figure, the vortex zone a before the flow is diverted can be transformed into the vortex zone b after the flow is diverted. It can be seen from the figure that the position of the vortex zone has been moved from the corner of the second flow channel 31 to the middle of the second flow channel and close to the inner wall of the valve seat 3. Here, the inner wall of the valve seat has a smooth edge, which is different from the wall surface with a certain corner at the corner. The degree of erosion of the wall surface of the valve seat 3 by the drilling fluid in the vortex zone b after the flow is diverted is significantly less than the degree of erosion in the vortex zone a before the flow is diverted.

[0044] It should be noted that the flow guiding effects of the guide strip 212 and the flow guiding groove 211 are not entirely the same. The respective functions of the guide strip 212 and the flow guiding groove 211 are described below:

[0045] 1) Guide strip 212:

[0046] Since there is a certain axial gap between the stator 8 and the rotor 2, which is usually about 1.5 mm, and the axial height of the guide strip 212 is 0.5 to 0.8 mm, that is, the upper end of the guide strip 212 is 0.5 to 0.8 mm higher than the upper plane of the rotor 2, when the blade 21 of the rotor 2 rotates and coincides with the position of the four first flow channels 81 on the stator 8, the drilling fluid flow gap between the stator 8 and the rotor 2 is reduced by about 40%. Since the high-speed drilling fluid flow flowing out along the outside of the blade 21 will directly rush to the corner of the lower valve seat (i.e. the corner of the second flow channel 31), now that the guide strip 212 is installed on the blade 21, the flow gap at the edge of the blade is reduced, and correspondingly less fluid flows into the area below the rotor through the blade, thus reducing the erosion of the valve seat corner area by the drilling fluid. Meanwhile, the arc-shaped structure on the outer circumference of the guide band 212 can concentrate the drilling fluid flow to the middle position of the second flow channel 31, changing the position of the vortex zone. This makes it easier to install the cemented carbide erosion-resistant block on the side wall of the middle position of the second flow channel 31, which can further improve the erosion resistance of the side wall of the second flow channel 31 to the new vortex zone.

[0047] 2) Guide channel 211:

[0048] Since the guide strip 212 reduces the area of ​​the flow gap at the edge of the blade 21, the guide groove 211 has two functions: first, to guide the drilling fluid to the middle position of the second flow channel 31 (i.e., the protected area where the hard alloy erosion-resistant block is installed); second, to balance the flow area reduced by the guide strip 212. In other words, the guide groove 211 can make up for the flow area reduced by the guide strip 212. The flow areas of the two are basically balanced by the increase and decrease, thereby avoiding the impact on the signal strength of the pressure pulse.

[0049] In this embodiment, screw holes 32 can be provided on the lower end face of the valve seat 3 and between two adjacent second flow channels 31. The number of screw holes 32 can be four. The screw holes 32 can cooperate with the screws on the functional module below the valve seat 3, so that the functional module below the valve seat 3 can be fixedly connected to the lower end of the valve body device, so that the valve body device and the functional module below are fastened together to form a complete drilling and surveying tool. Here, the functional module may include, for example, a drive sub, a measuring sub, and a battery sub, etc., which can be arbitrarily selected according to actual operation requirements. The connection method between the functional module and the valve seat 3 is not limited to the screw and screw hole connection, and other connection methods can be selected as needed. The number of screw holes 32 can also be arbitrarily selected, and the present invention does not specifically limit it.

[0050] In this embodiment, multiple erosion-resistant blocks 5 can be installed on the inner wall of the valve seat 3. The number of erosion-resistant blocks 5 can be four, and each of the four erosion-resistant blocks 5 corresponds one-to-one with one of the four second flow channels 31. All four erosion-resistant blocks 5 can be installed on the inner wall where the four second flow channels 31 are located. Figure 3 As can be seen, each erosion-resistant block 5 can approach the vortex zone b after the flow is guided, allowing the drilling fluid in the vortex zone b to directly act on the erosion-resistant block 5, thereby protecting the sidewall material of the valve seat 3 and preventing the sidewall of the valve seat 3 from being directly eroded and damaged. Here, the material of the erosion-resistant block 5 can be a hard alloy material, such as tungsten-cobalt hard alloys YG6, YG8, etc. By setting erosion-resistant blocks on the inner wall of the second flow channel of the valve seat, the erosion resistance of the valve seat can be further improved. The processing of erosion-resistant blocks at the middle position of the second flow channel and at the smooth edge of the inner wall of the valve seat is less difficult and less expensive than processing at the corners of the second flow channel, and it is easier to protect the valve seat material. However, the present invention is not limited to this, and the material of the erosion-resistant block 5 is not limited to the above-mentioned materials, as long as it can ensure sufficient erosion resistance. The present invention does not make specific limitations in this regard.

[0051] In this embodiment, the valve body device may further include a wear-resistant ring 6, which is inserted into the valve cylinder 1 and located between the rotor 2 and the valve cylinder 1. The outer wall of the wear-resistant ring 6 can be tightly fitted with the inner wall of the valve cylinder 1, and the upper end of the wear-resistant ring 6 can be aligned with the upper end of the rotor 2. The drilling fluid in the inner cavity of the valve cylinder 1 flows from top to bottom through the rotor 2 and, after being guided by the rotor 2, can act on the wear-resistant ring 6. Due to the erosion resistance of its wear-resistant material, the wear-resistant ring 6 can prevent the drilling fluid from eroding it, thereby protecting the material of the valve cylinder 1 from the erosion of the drilling fluid and improving the erosion resistance of the side wall of the valve cylinder 1. Here, the material of the wear-resistant ring 6 may specifically be tungsten-cobalt or tungsten-titanium-cobalt hard alloy, etc. However, the present invention is not limited to this, and the material of the wear-resistant ring 6 may not be limited to the above-mentioned materials, as long as it can ensure sufficient erosion resistance. The present invention does not make specific limitations in this regard.

[0052] In this embodiment, the valve body device may further include a valve cover 4, which can be fastened to the upper end of the valve cylinder 1 by a threaded connection. The valve cover 4 can be connected to the retrieval tool on the upper part of the valve body device and can be used to retrieve the valve body device from the well. However, the present invention is not limited to this. The valve cover 4 and the valve cylinder 1 can also be connected by other connection methods. The present invention does not specifically limit this.

[0053] Alternatively, a reducing section 41 is formed on the side wall of the valve cover 4, from... Figure 5 As can be seen, the variable diameter section 41 allows the inner diameter of the valve cover 4 to change axially. Specifically, the inner diameter of the valve cover 4 can gradually decrease and then gradually increase from top to bottom, while the inner diameter below the variable diameter section 41 can remain consistent axially. The radially inwardly protruding part of the variable diameter section 41 can be formed as an inner protrusion, allowing the retrieval tool to extend into the valve cover 4 from the variable diameter section 41 and be axially limited by the inner protrusion of the variable diameter section 41, thereby preventing the retrieval tool from detaching from the valve cover 4 during the retrieval operation. However, the present invention is not limited to this, and the structure and shape of the variable diameter section 41 can be arbitrarily adjusted according to actual operational needs. The present invention does not specifically limit this.

[0054] Optionally, multiple retrieval holes 42 can be provided on the side wall of the valve cover 4. All multiple retrieval holes 42 can penetrate the side wall of the valve cover 4 radially. Here, the number of retrieval holes 42 can be three. The lower end of the retrieval tool can form a locking part corresponding to each of the three retrieval holes 42. The locking part of the retrieval tool can extend and retract radially. When the retrieval tool is inserted into the valve cover 4 from above, the locking part can be inserted into the corresponding retrieval hole 42, so that the locking part of the retrieval tool is engaged with the retrieval hole 42. Then, by lifting the retrieval tool, the valve body device can be retrieved and brought out of the well. However, the present invention is not limited to this. The number of retrieval holes 42 provided on the side wall of the valve cover 4 can also be arbitrarily selected, as long as they can correspond one-to-one with the locking part at the lower end of the retrieval tool. The present invention does not make a specific limitation in this regard.

[0055] In this embodiment, sealing grooves 7 can be provided circumferentially on the outer walls of valve cylinder 1, valve seat 3 and valve cover 4. Sealing rings can be installed in the sealing grooves 7 to seal the outer side of the valve body device. Here, the number and size of the sealing grooves 7 and the material of the sealing rings can be arbitrarily selected according to the operational requirements. This invention does not impose specific limitations on this.

[0056] The detailed operation of the valve body device resistant to large-volume erosion described in this exemplary embodiment is as follows:

[0057] High-pressure drilling fluid is input from the upper end of valve cover 4 into valve cover 4 and valve cylinder 1. Opening the drive section at the lower end of valve seat 3 drives rotor 2 to rotate within valve cylinder 1. The drilling fluid is protected by the wear-resistant ring 6, preventing direct erosion of the inner wall of valve cylinder 1. As the drilling fluid flows through rotor 2, its flow direction is altered by the guiding action of the guide grooves 211 and guide bands 212 on the blades 21. This causes the drilling fluid to enter the valve seat 3 and enter the vortex zone (i.e., the area originally formed at the corner of the second flow channel 31) after entering the valve seat 3. Figure 3 The vortex region a) before the flow guide is transferred to the middle position of the second flow channel 31 (i.e. Figure 3 The drilling fluid in the vortex zone b after the flow is guided can avoid direct erosion of the inner wall of the valve seat 3 due to the protection of the erosion-resistant block 5, thereby realizing the erosion resistance of the valve tube and valve seat materials.

[0058] When it is necessary to retrieve the valve body device, the locking part at the lower end of the retrieval tool can be retracted radially first, so that the retrieval tool can be inserted into the valve cover 4 through the reducing section 41. Then, the locking part of the retrieval tool is aligned with the retrieval hole 42 on the side wall of the valve cover 4, and the locking part is extended radially into the corresponding retrieval hole 42, so that the retrieval tool is fixedly connected to the valve cover 4. Then, the retrieval tool is lifted up, and the valve body device and its lower components can be retrieved from the well as a whole.

[0059] Exemplary Example 2

[0060] This exemplary embodiment provides a drilling surveying tool.

[0061] The drilling survey tool described in this exemplary embodiment may include a valve body device resistant to high-volume erosion as described in Exemplary Embodiment 1.

[0062] The drilling measurement-while-drilling tool described in this exemplary embodiment may also include other components such as a drive sub, a measuring sub, and a battery sub connected to the lower end of the valve body device resistant to large displacement erosion as described in Exemplary Embodiment 1; however, the present invention is not limited thereto. The components included in the drilling measurement-while-drilling tool described in this exemplary embodiment may also be other components besides the drive sub, measuring sub, and battery sub, and may be arbitrarily selected according to actual operational needs. The present invention does not make specific limitations in this regard.

[0063] In summary, the valve body device of this invention completely removes the "cross-shaped" retrieval structure at the center of the valve cover, resulting in a hollow structure in the middle. The upper opening of the valve cover is formed into a variable diameter section, facilitating the introduction and lifting of retrieval tools. The valve cover has three retrieval holes for connecting with the retrieval tools. These three retrieval holes can provide a pulling force of over 8 tons for the retrieval tools, solving the problem of not being able to pull the tools out of the drill string when the valve body is stuck. The valve body device of this invention optimizes the structure of the outer edge of the rotor by creating a guide groove and adding a guide belt, shifting the high-velocity vortex zone of the drilling fluid from the edge corner of the valve seat flow channel to the smooth center, thus facilitating the local addition of erosion-resistant hard alloy and significantly improving erosion resistance. The high-displacement erosion resistance of the valve body device of this invention can be increased from about 50L / s to 80L / s, and the high-displacement erosion resistance life can be increased by more than 5 times from about 100 hours to over 500-1000 hours.

[0064] Although the present invention has been described above in conjunction with exemplary embodiments and accompanying drawings, those skilled in the art should understand that various modifications can be made to the above embodiments without departing from the spirit and scope of the claims.

Claims

1. A valve body device resistant to large-volume erosion, characterized in that, The valve body assembly includes a valve cylinder, a valve seat, a rotor, and a stator, wherein, The valve seat is fixedly connected to the lower end of the valve cylinder, and the rotor passes through the valve cylinder. The rotor can be driven to rotate in the valve cylinder. The rotor includes a shaft and several blades. One end of the shaft passes through the valve seat and can rotate relative to the valve seat. Several blades are fixedly connected to the other end of the shaft and are evenly distributed circumferentially on the outer side of the shaft. Several guide grooves are opened at the radial outer end of each blade. The guide grooves are spaced apart from each other and distributed circumferentially on the blade. Guide bands are provided radially at the edges on both sides of each blade. The stator is installed inside the valve cylinder and spaced above the rotor. Several axially penetrating first flow channels are formed in the stator. Several axially penetrating second flow channels are formed in the valve seat. Drilling fluid can flow through the valve body device along the first and second flow channels. Several guide grooves and guide bands can transfer the vortex areas formed at the corners of the several second flow channels to the middle position of the second flow channels when the rotor rotates, so as to reduce the erosion of the valve seat by the drilling fluid.

2. The valve body device resistant to large-volume erosion according to claim 1, characterized in that, The valve seat has a screw hole between two adjacent second flow channels for fastening the valve seat to the functional module below the valve seat.

3. The valve body device resistant to large-volume erosion according to claim 1, characterized in that, The valve seat has several erosion-resistant blocks installed on its inner wall. Each of the several erosion-resistant blocks corresponds to one of the several second flow channels and is located in one of the several second flow channels. The several erosion-resistant blocks can withstand the erosion of the valve seat sidewall by the vortex zone in the middle of the second flow channel, so as to further improve the erosion resistance of the valve seat sidewall.

4. The valve body device resistant to large-volume erosion according to claim 1, characterized in that, The valve body device also includes a wear-resistant ring, which passes through the valve cylinder and is in close contact with the inner wall of the valve cylinder. The upper end of the wear-resistant ring is flush with the upper end of the rotor. The wear-resistant ring can improve the erosion resistance of the side wall of the valve cylinder.

5. The valve body device resistant to large-volume erosion according to claim 1, characterized in that, The valve body device also includes a valve cover, which is fixedly connected to the upper end of the valve cylinder. The valve cover can be connected to a retrieval tool on the upper part of the valve body device for retrieving the valve body device from the well.

6. The valve body device resistant to large-volume erosion according to claim 5, characterized in that, The valve cover has a variable diameter section on its side wall, which allows the inner diameter of the valve cover to gradually decrease from top to bottom and then gradually increase, forming an inner convex portion for axially limiting the salvage tool that extends into the valve cover.

7. The valve body device resistant to large-volume erosion according to claim 5, characterized in that, The valve cover has several radially penetrating retrieval holes on its side wall. These holes can be used to engage the lower end of a retrieval tool, facilitating the retrieval of the valve body device.

8. The valve body device resistant to large-volume erosion according to claim 5, characterized in that, The outer walls of the valve cover, valve cylinder, and valve seat are all provided with sealing grooves along the circumference, and sealing rings can be installed in the sealing grooves to seal the outside of the valve body device.

9. The valve body device resistant to large-volume erosion according to claim 1, characterized in that, The number of guide grooves opened on each of the plurality of blades is three. The three guide grooves are distributed along the circumference of the blade, and each guide groove is opened along the radial direction of the blade and connected to the radial outer end of the blade.

10. A drilling surveying tool, characterized in that, The MWD tool includes a valve body device resistant to high-displacement erosion as described in any one of claims 1 to 9, and the MWD tool further includes a drive sub, a measuring sub, and a battery sub connected to the lower end of the valve body device.

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