General stator and rotor assembly for mud pulser

Abstract

The invention relates to the technical field of measurement-while-drilling instruments for petroleum drilling, and discloses a general stator and rotor assembly for a mud pulser, a stator and rotor assembly is assembled in an assembly shell, the stator and rotor assembly can be used for realizing a high-speed or low-speed stator and rotor pulser, and a stator pressing ring is arranged at one end of the assembly shell and is pressed on the stator and rotor assembly. The other end of the stator and rotor assembly is provided with a rotor backing ring, the conical shell is arranged in the assembly shell and is pressed on the other end of the stator and rotor assembly through the rotor backing ring, the low-speed / high-speed use requirements of a drilling site on the mud pulser can be met on the premise that other accessories are not replaced, the structure is simple, connection is reliable, and the cost is low. The low-speed and high-speed use requirements of on-site well logging while drilling on the mud pulser are effectively met, the non-production cost is effectively reduced while the purchase of instruments and equipment is reduced, and the utilization rate of the instruments and equipment is improved.

Description

Technical Field

[0001] The invention relates to the technical field of drilling-while-drilling measurement instruments for oil well drilling, in particular to a universal stator and rotor assembly of a mud pulser. Background Art

[0002] Mud pulser is a key part of the downhole information transmission in the measurement while drilling instrument for oil drilling. It is currently widely used in the field of logging while drilling. According to the need for downhole information transmission data volume, major manufacturers have developed low-speed and high-speed mud pulsers of different structural types to meet the needs of field applications. In order to meet the needs of oil and gas exploration and development, it is necessary to purchase multiple types of mud pulsers at the same time. This will result in: 1. Different manufacturers have different interfaces and require additional design of conversion short sections; 2. Mud pulsers with multiple structures will increase the number of staff, increase maintenance costs, and increase the cost of purchasing instruments and equipment; 3. Due to the requirements of actual wells, the user unit often needs to use both low-speed and high-speed mud pulsers to minimize costs, but the demand often fluctuates, and it is difficult to grasp this change when purchasing instruments and equipment. Designing a mud pulser that can achieve high / low speed conversion is the simplest and most effective technical means to solve the problem, and the stator and rotor assembly of the mud pulser is its core part. At present, there is no universal stator and rotor assembly that can meet the use requirements of low-speed / high-speed pulsers at the same time, and the above problems cannot be solved. Summary of the invention

[0003] In order to overcome the defects of the above-mentioned prior art, the purpose of the present invention is to provide a universal stator and rotor assembly of a mud pulser to solve the technical problem that the universal stator and rotor assembly in the prior art cannot simultaneously meet the use requirements of low-speed / high-speed pulsers.

[0004] The present invention is achieved through the following technical solutions:

[0005] A universal stator and rotor assembly of a mud pulser comprises a stator clamping ring, an assembly housing, a stator and rotor assembly, a conical housing, a drive shaft and a servo motor; the conical side of the stator gasket is arranged in the assembly housing, the stator and rotor assembly is assembled in the conical side of the stator gasket, the stator and rotor assembly is used to realize a high-speed or low-speed stator and rotor pulser, the stator clamping ring is arranged at one end of the assembly housing and is clamped on the stator and rotor assembly, a rotor gasket is arranged at the other end of the stator and rotor assembly, the conical housing is arranged in the assembly housing and is clamped on the other end of the stator and rotor assembly through the rotor gasket, the servo motor is located outside the assembly housing, one end of the drive shaft is connected to the servo motor, and the other end extends into the assembly housing, and is inserted into the stator and rotor assembly through the conical housing and the rotor gasket, and a rotor clamping assembly is provided at the end of the drive shaft extending into the stator and rotor assembly.

[0006] Preferably, when the stator-rotor assembly is a high-speed stator-rotor assembly, the stator-rotor assembly includes a high-speed pulser stator and a high-speed pulser rotor; the high-speed pulser stator is arranged in the tapered side of the stator gasket, the stator clamping ring is clamped on one end of the high-speed pulser stator, one side of the high-speed pulser rotor abuts on the high-speed pulser stator, the conical shell is arranged on the other side of the high-speed pulser rotor, the rotor gasket is arranged between the high-speed pulser rotor and the conical shell, one end of the drive shaft extends into the assembly shell, passes through the high-speed pulser rotor through the conical shell and the rotor gasket, and then is inserted into the high-speed pulser stator, and the rotor clamping assembly abuts on the high-speed pulser rotor at the end of the drive shaft.

[0007] Furthermore, the high-speed pulser stator includes a high-speed pulser stator shell; the high-speed pulser stator shell is a hollow cylindrical structure, and a high-speed pulse mud inlet spherical surface is provided at the center position of the high-speed pulser stator shell, and the drive shaft is inserted into the high-speed pulse mud inlet spherical surface, and a plurality of high-speed mud holes are evenly distributed circumferentially from the high-speed pulse mud inlet spherical surface as the center to the inner wall of the high-speed pulser stator shell, and the edges of the plurality of high-speed mud holes are conical surfaces, and a plurality of key grooves are annularly distributed on one side of the high-speed pulser stator shell close to the stator clamping ring for clamping the stator clamping ring.

[0008] Furthermore, the high-speed pulser rotor includes a high-speed rotating structure, the outer edge of which is a three-petal structure and is positioned corresponding to the mud hole of the high-speed pulser stator; a high-speed rotor center hole is provided at the center of the high-speed rotating structure, and the drive shaft passes through the high-speed rotor center hole and is inserted into the high-speed pulser stator.

[0009] Preferably, when the stator-rotor assembly is a low-speed stator-rotor assembly, the stator-rotor assembly includes a low-speed pulser stator and a low-speed pulser rotor; the low-speed pulser stator is arranged in the tapered side of the stator gasket, and the stator clamping ring is clamped on one end of the low-speed pulser stator, wherein a low-speed pulse stator adjustment ring is sleeved between the low-speed pulser stator and the stator clamping ring; one side of the low-speed pulser rotor abuts against the low-speed pulser stator, the conical outer shell is arranged on the other side of the low-speed pulser rotor, the rotor gasket is arranged between the low-speed pulser rotor and the conical outer shell, one end of the drive shaft extends into the assembly outer shell, passes through the low-speed pulser rotor through the conical outer shell and the rotor gasket, and is inserted into the low-speed pulser stator; the rotor clamping assembly abuts against the low-speed pulser rotor at the end of the drive shaft.

[0010] Furthermore, the stator of the low-speed pulser includes a low-speed pulser stator shell; the stator shell of the low-speed pulser is a hollow cylindrical structure, and a low-speed pulse mud inlet spherical surface is provided at the center position of the stator shell of the low-speed pulser, and the drive shaft is inserted into the low-speed pulse mud inlet spherical surface, and a plurality of low-speed mud holes are evenly distributed circumferentially from the low-speed pulse mud inlet spherical surface as the center to the inner wall of the stator shell of the low-speed pulser, and the edges of the plurality of low-speed mud holes are conical surfaces.

[0011] Furthermore, the high-speed pulser rotor includes a low-speed rotor structure, the outer edge of which is a four-petal structure and is positioned corresponding to the mud hole of the low-speed pulser stator; a low-speed rotor center hole is provided at the center of the low-speed rotor structure, and the drive shaft passes through the low-speed rotor center hole and is inserted into the low-speed pulser stator.

[0012] Furthermore, the rotor clamping assembly includes a hexagonal normal face nut, a conical washer, a conical slotted nut and a rotor clamping washer which are sleeved on the drive shaft; the hexagonal normal face nut presses the conical washer, the conical slotted nut and the rotor clamping washer onto the high-speed pulser rotor or the low-speed pulser rotor at the end of the drive shaft.

[0013] Furthermore, the conical slotted nut comprises a hexagonal nut and a conical sleeve, wherein the conical sleeve is arranged on the hexagonal nut, and the sleeve is provided with a plurality of slots along the circumferential direction.

[0014] Preferably, a dynamic seal is provided in the conical housing, an elastic retaining ring is sleeved on the side end of the dynamic seal, and an O-ring is sleeved between the dynamic seal and the drive shaft.

[0015] Compared with the prior art, the present invention has the following beneficial technical effects:

[0016] The present invention provides a universal stator and rotor assembly for a mud pulser. By assembling the stator and rotor assembly in an assembly housing, the stator and rotor assembly can be used to realize a high-speed or low-speed stator and rotor pulser. A stator clamping ring is arranged at one end of the assembly housing and is clamped on the stator and rotor assembly. A rotor gasket is arranged at the other end of the stator and rotor assembly. The conical housing is arranged in the assembly housing and is clamped on the other end of the stator and rotor assembly through the rotor gasket. The low-speed / high-speed use requirements of the mud pulser at the drilling site can be met without replacing other accessories. The structure is simple and the connection is reliable. The low-speed and high-speed use requirements of the mud pulser at the on-site logging while drilling are effectively solved. While reducing the purchase of instruments and equipment, the non-production cost is also effectively reduced, and the utilization rate of the instruments and equipment is improved.

[0017] Furthermore, when the stator-rotor assembly is a high-speed stator-rotor assembly, the stator-rotor assembly includes a high-speed pulser stator and a high-speed pulser rotor. The high-speed pulser stator is arranged in the tapered side of the stator gasket, and the stator clamping ring is clamped on one end of the high-speed pulser stator. One side of the high-speed pulser rotor abuts against the high-speed pulser stator, which effectively solves the requirement for high-speed use of mud pulsers in on-site logging while drilling.

[0018] Furthermore, the mud inlet side of the high-speed pulser stator adopts a conical flow-guiding and spherical erosion-resistant structure, and the conical surfaces at the edges of the three circumferentially evenly distributed mud holes have a smooth transition to reduce the erosion of the stator by the mud. At the same time, three circumferentially evenly distributed keyways are arranged on the end face of the outer cylinder, which cooperate with the stator clamping ring to radially fix the rotor.

[0019] Furthermore, the overall structure of the high-speed pulser rotor is a three-petal structure to achieve cooperation with the high-speed pulser stator, and a plane that cooperates with the drive shaft is provided at the center hole to achieve power transmission.

[0020] Furthermore, when the stator-rotor assembly is a low-speed stator-rotor assembly, the stator-rotor assembly includes a low-speed pulser stator and a low-speed pulser rotor; the low-speed pulser stator is arranged in the tapered side of the stator gasket, the stator clamping ring is clamped on one end of the low-speed pulser stator, and a low-speed pulse stator adjustment ring is sleeved between the low-speed pulser stator and the stator clamping ring, and one side of the low-speed pulser rotor abuts against the low-speed pulser stator, which effectively solves the demand for low-speed use of mud pulsers in on-site logging while drilling.

[0021] Furthermore, four mud holes are evenly distributed in the circumferential direction in the stator of the low-speed pulser, and a spherical erosion-resistant structure is adopted on the mud inlet side to reduce the erosion of the stator by the mud.

[0022] Furthermore, the overall structure of the low-speed pulser rotor is a four-petal structure to achieve cooperation with the low-speed pulser stator, and a plane that cooperates with the drive shaft is provided at the center hole to achieve power transmission.

[0023] Furthermore, the rotor clamping assembly effectively ensures the stability of the rotor case on the drive shaft, wherein the lower end of the conical slotted nut is a hexagonal nut structure, and the upper end adopts a conical slotted structure, which cooperates with the rotor clamping washer, conical washer and hexagonal normal nut to achieve axial fixation and anti-loosening of the high-speed pulser rotor, avoiding the loosening of the rotor due to high-speed rotation of the rotor. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of a universal stator and rotor assembly of a mud pulser (high speed) in the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of a universal stator and rotor assembly of a mud pulser (low speed) in the present invention;

[0026] Figure 3 This is a schematic diagram of the stator structure of the high-speed pulser in the present invention;

[0027] Figure 4 It is a schematic diagram of the rotor structure of the high-speed pulser in the present invention;

[0028] Figure 5 It is a schematic diagram of the structure of the conical slotted nut in the present invention;

[0029] Figure 6 It is a schematic diagram of the stator structure of the low-speed pulser of the present invention;

[0030] Figure 7 It is a schematic diagram of the rotor structure of the low-speed pulser of the present invention;

[0031] In the figure: 1-stator clamping ring; 2-assembly housing; 3-high-speed pulser stator; 4-high-speed pulser rotor; 5-rotor gasket; 6-stator gasket; 7-conical housing; 8-drive shaft; 9-servo motor; 10-hexagonal normal nut; 11-conical washer; 12-conical slotted nut; 13-rotor clamping washer; 14-elastic retaining ring; 15-O-ring; 16-dynamic seal; 17-low-speed pulse stator adjustment ring; 18-low-speed pulser stator 1-low speed pulser stator housing; 19-low speed pulser rotor; 31-high speed pulser stator housing; 32-high speed pulse inlet sphere; 33-high speed mud hole; 34-keyway; 41-high speed swivel structure; 42-high speed rotor center hole; 121-hexagonal nut; 122-conical sleeve; 123-slot; 181-low speed pulser stator housing; 182-low speed pulse inlet sphere; 183-low speed mud hole; 191-low speed swivel structure; 192-low speed rotor center hole. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0033] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0034] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0035] The object of the present invention is to provide a universal stator and rotor assembly for a mud pulser, so as to solve the technical problem in the prior art that the universal stator and rotor assembly cannot simultaneously meet the use requirements of low-speed / high-speed pulsers.

[0036] See also Figure 1 and Figure 2 In one embodiment of the present invention, a universal stator and rotor assembly of a mud pulser is provided, comprising a stator clamping ring 1, an assembly housing 2, a stator and rotor assembly, a conical housing 7, a drive shaft 8 and a servo motor 9; the conical side of the stator gasket 6 is arranged in the assembly housing 2, the stator and rotor assembly is assembled in the conical side of the stator gasket 6, the stator and rotor assembly is used to realize a high-speed or low-speed stator and rotor pulser, the stator clamping ring 1 is arranged at one end of the assembly housing 2 and is pressed on the stator and rotor assembly, a rotor gasket 5 is arranged at the other end of the stator and rotor assembly, the conical housing 7 is arranged in the assembly housing 2 and is pressed on the other end of the stator and rotor assembly through the rotor gasket 5, the servo motor 9 is located outside the assembly housing 2, one end of the drive shaft 8 is connected to the servo motor 9, and the other end extends into the assembly housing 2, and is inserted into the stator and rotor assembly through the conical housing 7 and the rotor gasket 5, and the drive shaft 8 is provided with a rotor clamping assembly at the end extending into the stator and rotor assembly.

[0037] Specifically, according to Figure 1As shown, when the stator-rotor assembly is a high-speed stator-rotor assembly, the stator-rotor assembly includes a high-speed pulser stator 3 and a high-speed pulser rotor 4; the high-speed pulser stator 3 is arranged in the tapered side of the stator gasket 6, the stator clamping ring 1 is clamped on one end of the high-speed pulser stator 3, one side of the high-speed pulser rotor 4 abuts on the high-speed pulser stator 3, the conical shell 7 is arranged on the other side of the high-speed pulser rotor 4, the rotor gasket 5 is arranged between the high-speed pulser rotor 4 and the conical shell 7, one end of the drive shaft 8 extends into the assembly shell 2, passes through the high-speed pulser rotor 4 through the conical shell 7 and the rotor gasket 5, and then is inserted into the high-speed pulser stator 3, and the rotor clamping assembly abuts on the high-speed pulser rotor 4 at the end of the drive shaft 8.

[0038] Among them, according to Figure 3 As shown, the high-speed pulser stator 3 includes a high-speed pulser stator housing 31; the high-speed pulser stator housing 31 is a hollow cylindrical structure, and a high-speed pulse mud inlet spherical surface 32 is provided at the center position of the high-speed pulser stator housing 31, and the drive shaft 8 is inserted into the high-speed pulse mud inlet spherical surface 32, and a plurality of high-speed mud holes 33 are evenly distributed circumferentially from the high-speed pulse mud inlet spherical surface 32 as the center to the inner wall of the high-speed pulser stator housing 31, and the edges of the plurality of high-speed mud holes 33 are conical surfaces, and a plurality of key grooves 34 are annularly distributed on one side of the high-speed pulser stator housing 31 close to the stator clamping ring 1 for clamping the stator clamping ring 1.

[0039] Among them, according to Figure 4 As shown, the high-speed pulser rotor 4 includes a high-speed rotating structure 41, the outer edge of the high-speed rotating structure 41 is a three-petal structure, and the position is arranged corresponding to the mud hole of the high-speed pulser stator 3; a high-speed rotor center hole 42 is arranged at the center of the high-speed rotating structure 41, and the drive shaft 8 passes through the high-speed rotor center hole 42 and then is inserted into the high-speed pulser stator 3.

[0040] Specifically, according to Figure 2 As shown, when the stator-rotor assembly is a low-speed stator-rotor assembly, the stator-rotor assembly includes a low-speed pulser stator 18 and a low-speed pulser rotor 19; the low-speed pulser stator 18 is arranged in the tapered side of the stator gasket 6, and the stator clamping ring 1 is clamped on one end of the low-speed pulser stator 18, wherein a low-speed pulse stator adjustment ring 17 is sleeved between the low-speed pulser stator 18 and the stator clamping ring 1; one side of the low-speed pulser rotor 19 abuts on the low-speed pulser stator 18, the conical housing 7 is arranged on the other side of the low-speed pulser rotor 19, the rotor gasket 5 is arranged between the low-speed pulser rotor 19 and the conical housing 7, one end of the drive shaft 8 extends into the assembly housing 2, passes through the low-speed pulser rotor 19 through the conical housing 7 and the rotor gasket 5, and is inserted into the low-speed pulser stator 18; the rotor clamping assembly abuts on the low-speed pulser rotor 19 at the end of the drive shaft 8.

[0041] Among them, according to Figure 6 As shown, the low-speed pulser stator 18 includes a low-speed pulser stator housing 181; the low-speed pulser stator housing 181 is a hollow cylindrical structure, and a low-speed pulse mud inlet spherical surface 182 is provided at the center position of the low-speed pulser stator housing 181, and the drive shaft 8 is inserted into the low-speed pulse mud inlet spherical surface 182, and a plurality of low-speed mud holes 183 are evenly distributed circumferentially from the low-speed pulse mud inlet spherical surface 182 as the center to the inner wall of the low-speed pulser stator housing 181, and the edges of the plurality of low-speed mud holes 183 are conical surfaces.

[0042] Among them, according to Figure 7 As shown, the high-speed pulser rotor 4 includes a low-speed rotating structure 191, the outer edge of the low-speed rotating structure 191 is a four-petal structure, and the position is set corresponding to the mud hole of the low-speed pulser stator 18; a low-speed rotor center hole 192 is provided at the center of the low-speed rotating structure 191, and the drive shaft 8 passes through the low-speed rotor center hole 192 and is inserted into the low-speed pulser stator 18.

[0043] Among them, the rotor clamping assembly includes a hexagonal normal face nut 10, a conical washer 11, a conical slotted nut 12 and a rotor clamping washer 13 which are sleeved on the drive shaft 8; the hexagonal normal face nut 10 presses the conical washer 11, the conical slotted nut 12 and the rotor clamping washer 13 onto the high-speed pulser rotor 4 or the low-speed pulser rotor 19 at the end of the drive shaft 8.

[0044] Among them, according to Figure 5 As shown, the conical slotted nut 12 comprises a hexagonal nut 121 and a conical sleeve 122 . The conical sleeve 122 is arranged on the hexagonal nut 121 . The sleeve 122 is provided with a plurality of slots 123 along the circumferential direction.

[0045] Specifically, a dynamic seal 16 is provided in the conical housing 7 , a side end of the dynamic seal 16 is sleeved with an elastic retaining ring 14 , and an O-ring is sleeved between the dynamic seal 16 and the drive shaft 8 .

[0046] Example

[0047] The present embodiment provides a universal stator and rotor assembly of a mud pulser, including: a stator clamping ring 1, an assembly housing 2, a high-speed pulser stator 3, a high-speed pulser rotor 4, a rotor gasket 5, a stator gasket 6, a conical housing 7, a drive shaft 8, a servo motor 9, a hexagonal normal nut 10, a conical washer 11, a conical slotted nut 12, a rotor clamping washer 13, an elastic retaining ring 14, an O-ring 15, a dynamic seal 16, a low-speed pulse stator adjustment ring 17, a low-speed pulser stator 18, and a low-speed pulser rotor 19.

[0048] The tapered side of the stator gasket 6 is inserted and installed in the assembly housing 2, the high-speed pulser stator 3 is installed on the upper side of the stator gasket 6, and then the stator clamping ring 1 clamps the high-speed pulser stator 3 to assemble into a stator assembly; the dynamic seal 16 is installed in the conical housing 7, the conical housing 7 with the dynamic seal 16 is inserted and installed on the drive shaft 8 with the O-ring 15 pre-installed, the rotor gasket 5 is inserted and installed to the drive shaft 8, and then the high-speed pulser rotor 4 is inserted and installed, and then the rotor clamping washer 13, the conical slotted nut 12, the conical washer 11, and the hexagonal normal nut 10 are installed in sequence to fix the high-speed pulser rotor 4, and assembled into a rotor assembly, connected with the common parts of the pulser such as the servo motor 9, and then the assembled stator assembly is axially connected and fixed with the rotor assembly to form a high-speed pulser with a complete structure. The method of using the high-speed / low-speed pulser switch is: remove the high-speed pulser stator 3 and the high-speed pulser rotor 4; install the low-speed pulser stator 18, the low-speed pulser rotor 19 and the low-speed pulse stator adjustment ring 17; switch the ground software system to the low-speed decoding system; switch the low-speed pulser to the high-speed pulser, and vice versa.

[0049] When using a low-speed pulser, it is necessary to replace the high-speed pulser stator 3 and the high-speed pulser rotor 4 with a low-speed pulser stator 18 and a low-speed pulser rotor 19. In addition, a low-speed pulse stator adjustment ring 17 needs to be installed on the upper side of the low-speed pulser stator 18, while other parts remain unchanged to realize the structure of the low-speed pulser.

[0050] The mud inlet side of the high-speed pulser stator 3 adopts a conical flow-guiding and spherical erosion-resistant structure. The conical surfaces at the edges of the three circumferentially evenly distributed mud holes have smooth transitions to reduce the erosion of the high-speed pulser stator 3 by the mud. At the same time, three circumferentially evenly distributed keyways are arranged on the end face of the outer cylinder, which cooperate with the stator clamping ring 1 to radially fix the high-speed pulser rotor 4.

[0051] Among them, the high-speed pulser rotor 4 has an overall structure of a three-petal structure to achieve cooperation with the high-speed pulser stator 3, and a plane that cooperates with the drive shaft 8 is provided at the center hole to achieve power transmission.

[0052] The low-speed pulser stator 18 has four mud holes evenly distributed around the circumference, and the mud inlet side adopts a spherical erosion-resistant structure. The low-speed pulser rotor 19 has a four-petal structure to achieve cooperation with the low-speed pulser stator 18, and a plane is provided at the center hole to cooperate with the drive shaft 8 to achieve power transmission.

[0053] In this embodiment, the hexagonal normal face nut 10 presses the conical washer 11, the conical slotted nut 12 and the rotor clamping washer 13 onto the high-speed pulser rotor 4 or the low-speed pulser rotor 19 at the end of the driving shaft 8, wherein the conical slotted nut 12 includes a hexagonal nut 121 and a conical sleeve 122, the conical sleeve 122 is arranged on the hexagonal nut 121, and the sleeve 122 is provided with a plurality of slots 123 along the circumferential direction; the conical slotted nut 12 cooperates with the rotor clamping washer 13, the conical washer 11 and the hexagonal normal face nut 10 to realize the axial fixation and anti-loosening of the high-speed pulser rotor 4, and avoid the loosening of the high-speed pulser rotor 4 due to the high-speed rotation of the high-speed pulser rotor 4.

[0054] In summary, the present invention provides a universal stator and rotor assembly for a mud pulser, which can simultaneously meet the low-speed / high-speed use requirements of the mud pulser at the drilling site, and has a simple structure and reliable connection, which effectively solves the low-speed and high-speed use requirements of the on-site logging while drilling for the mud pulser, reduces the purchase of instruments and equipment, and effectively reduces non-production costs and improves the utilization rate of instruments and equipment. Through the universal design of the stator and rotor assembly, the conversion of low-speed / high-speed pulsers can be achieved by only replacing the stator and rotor assembly while other parts remain unchanged, meeting the different use requirements of the logging while drilling site; it is conducive to the unification of instrument interfaces, reducing interface conversion problems caused by the use of different instruments, and improving instrument reliability; it reduces the types of instrument and equipment purchase structures, integrates existing resources, effectively reduces manpower and material costs, and improves the utilization rate of instruments and equipment, and has a broad market application prospect.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A universal stator and rotor assembly for a mud pulser, It is characterized in that The invention comprises a stator clamping ring (1), an assembly housing (2), a stator-rotor assembly, a conical housing (7), a drive shaft (8) and a servo motor (9); the conical side of the stator gasket (6) is arranged in the assembly housing (2); the stator-rotor assembly is assembled in the conical side of the stator gasket (6); the stator-rotor assembly is used to realize a high-speed or low-speed stator-rotor pulser; the stator clamping ring (1) is arranged at one end of the assembly housing (2) and is pressed against the stator-rotor assembly; the other end of the stator-rotor assembly is arranged The conical housing (7) is arranged in the assembly housing (2) and is pressed against the other end of the stator-rotor assembly through the rotor ring (5). The servo motor (9) is located outside the assembly housing (2). One end of the drive shaft (8) is connected to the servo motor (9), and the other end extends into the assembly housing (2) and is inserted into the stator-rotor assembly through the conical housing (7) and the rotor ring (5). The drive shaft (8) is provided with a rotor pressing assembly at the end extending into the stator-rotor assembly.

2. A universal stator and rotor assembly of a mud pulser according to claim 1, It is characterized in that When the stator-rotor assembly is a high-speed stator-rotor assembly, the stator-rotor assembly comprises a high-speed pulser stator (3) and a high-speed pulser rotor (4); the high-speed pulser stator (3) is arranged in the conical side of the stator gasket (6); the stator clamping ring (1) is clamped on one end of the high-speed pulser stator (3); one side of the high-speed pulser rotor (4) abuts against the high-speed pulser stator (3); the conical housing (7) is arranged on the other side of the high-speed pulser rotor (4); the rotor gasket (5) is arranged between the high-speed pulser rotor (4) and the conical housing (7); one end of the drive shaft (8) extends into the assembly housing (2), passes through the high-speed pulser rotor (4) through the conical housing (7) and the rotor gasket (5), and then is inserted into the high-speed pulser stator (3); the rotor clamping assembly abuts against the high-speed pulser rotor (4) at the end of the drive shaft (8).

3. A universal stator and rotor assembly of a mud pulser according to claim 2, It is characterized in that The high-speed pulse generator stator (3) comprises a high-speed pulse generator stator shell (31); the high-speed pulse generator stator shell (31) is a hollow cylindrical structure, a high-speed pulse mud inlet spherical surface (32) is provided at the center of the high-speed pulse generator stator shell (31), the drive shaft (8) is inserted into the high-speed pulse mud inlet spherical surface (32), a plurality of high-speed mud holes (33) are evenly distributed circumferentially from the high-speed pulse mud inlet spherical surface (32) as the center to the inner wall of the high-speed pulse generator stator shell (31), and the edges of the plurality of high-speed mud holes (33) are conical surfaces, and a plurality of key grooves (34) are annularly distributed on one side of the high-speed pulse generator stator shell (31) close to the stator clamping ring (1) for clamping the stator clamping ring (1).

4. A universal stator and rotor assembly of a mud pulser according to claim 2, It is characterized in that The high-speed pulser rotor (4) comprises a high-speed rotating structure (41), the outer edge of the high-speed rotating structure (41) is a three-petal structure, and the position is arranged corresponding to the mud hole of the high-speed pulser stator (3); a high-speed rotor center hole (42) is arranged at the center of the high-speed rotating structure (41), and the driving shaft (8) passes through the high-speed rotor center hole (42) and is inserted into the high-speed pulser stator (3).

5. A universal stator and rotor assembly of a mud pulser according to claim 1, It is characterized in that When the stator-rotor assembly is a low-speed stator-rotor assembly, the stator-rotor assembly comprises a low-speed pulser stator (18) and a low-speed pulser rotor (19); the low-speed pulser stator (18) is arranged in the conical side of the stator gasket (6), the stator clamping ring (1) is clamped on one end of the low-speed pulser stator (18), wherein a low-speed pulse stator adjustment ring (17) is sleeved between the low-speed pulser stator (18) and the stator clamping ring (1); one side of the low-speed pulser rotor (19) abuts against the low-speed pulser On the stator (18), the conical shell (7) is arranged on the other side of the low-speed pulser rotor (19), the rotor gasket (5) is arranged between the low-speed pulser rotor (19) and the conical shell (7), one end of the drive shaft (8) extends into the assembly shell (2), passes through the conical shell (7) and the rotor gasket (5) through the low-speed pulser rotor (19), and is inserted into the low-speed pulser stator (18); the rotor clamping assembly abuts against the low-speed pulser rotor (19) at the end of the drive shaft (8).

6. A universal stator and rotor assembly of a mud pulser according to claim 5, It is characterized in that The low-speed pulser stator (18) comprises a low-speed pulser stator housing (181); the low-speed pulser stator housing (181) is a hollow cylindrical structure, a low-speed pulse mud inlet spherical surface (182) is provided at the center of the low-speed pulser stator housing (181), the drive shaft (8) is inserted into the low-speed pulse mud inlet spherical surface (182), and a plurality of low-speed mud holes (183) are evenly distributed circumferentially from the low-speed pulse mud inlet spherical surface (182) as the center to the inner wall of the low-speed pulser stator housing (181), and the edges of the plurality of low-speed mud holes (183) are conical surfaces.

7. A universal stator and rotor assembly of a mud pulser according to claim 5, It is characterized in that The high-speed pulser rotor (4) comprises a low-speed rotor structure (191), the outer edge of the low-speed rotor structure (191) is a four-petal structure, and the position is arranged corresponding to the mud hole of the low-speed pulser stator (18); a low-speed rotor center hole (192) is arranged at the center of the low-speed rotor structure (191), and the drive shaft (8) passes through the low-speed rotor center hole (192) and is inserted into the low-speed pulser stator (18).

8. A universal stator and rotor assembly of a mud pulser according to claim 2 or 5, It is characterized in that The rotor clamping assembly comprises a hexagonal normal face nut (10), a conical washer (11), a conical slotted nut (12) and a rotor clamping washer (13) which are sleeved on a drive shaft (8); the hexagonal normal face nut (10) presses the conical washer (11), the conical slotted nut (12) and the rotor clamping washer (13) against a high-speed pulser rotor (4) or a low-speed pulser rotor (19) at the end of the drive shaft (8).

9. A universal stator and rotor assembly of a mud pulser according to claim 8, It is characterized in that The conical slotted nut (12) comprises a hexagonal nut (121) and a conical sleeve (122). The conical sleeve (122) is arranged on the hexagonal nut (121), and the sleeve (122) is provided with a plurality of slots (123) along the circumferential direction.

10. A universal stator and rotor assembly of a mud pulser according to claim 1, It is characterized in that A dynamic seal (16) is provided in the conical outer shell (7), a side end of the dynamic seal (16) is sleeved with an elastic retaining ring (14), and an O-type seal ring is sleeved between the dynamic seal (16) and the drive shaft (8).

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