Jet motor device

Abstract

The present invention provides a jet motor device, which includes an outer cylinder assembly and a rotary drive assembly. The outer cylinder assembly includes an upper joint, an outer sleeve, and a lower joint. The rotary drive assembly includes a drive member and a first central member. Both the upper joint and the lower joint have through holes. The drive member has a central hole and a jet channel. The first end of the jet channel communicates with the central hole, and the second end of the jet channel extends to the outside of the drive member and reaches the side wall of the drive member. The jet channel is configured to spray the liquid in the central hole from the side wall of the drive member into the inner cavity, so that the drive member rotates around the axis of the outer sleeve under the reaction force of driving the liquid, and drives the first central member to rotate. Without setting a rotor and a stator, the jet motor device is not easily damaged and has high reliability.

Description

Technical Field

[0001] The present invention belongs to the field of drilling, and particularly relates to a jet motor device. Background Art

[0002] With the development of drilling technology, downhole rotary power drilling tools are widely used in downhole operations such as drilling, well completion, and workover. Among them, the most widely used is the positive displacement motor drilling tool.

[0003] The existing positive displacement motor drilling tool is a positive displacement downhole power drilling tool that uses liquid as power and converts liquid pressure energy into mechanical energy. Among them, the positive displacement motor drilling tool includes a positive displacement motor, a drill bit, and a connecting shaft. A rotor and a stator are arranged in the positive displacement motor. Specifically, when high-pressure liquid enters the positive displacement motor, it forces the rotor in the positive displacement motor to roll in the stator, and the generated torque and rotational speed are transmitted to the transmission shaft and the drill bit through a universal joint shaft to achieve the purpose of drilling.

[0004] However, during the drilling operation of the positive displacement motor drilling tool, the rotor and the stator are easily damaged, which in turn causes damage to the positive displacement motor drilling tool and has low reliability. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a jet motor device, which can make the jet motor device not easily damaged during operation and has high reliability.

[0006] The present invention provides a jet motor device, which includes an outer cylinder assembly and a rotary drive assembly. The outer cylinder assembly includes an upper joint, an outer sleeve, and a lower joint. The rotary drive assembly includes a driving member and a first central member. Both the upper joint and the lower joint have through holes. The top end of the outer sleeve is connected to the upper joint, and the inner cavity of the outer sleeve communicates with the through hole of the upper joint. Both the driving member and the first central member are movably arranged in the inner cavity of the outer sleeve. The first central member is connected to the side of the driving member facing away from the upper joint, and the first central member is relatively fixed to the outer sleeve in the axial direction of the outer sleeve.

[0007] Further, the driving member has a central hole and a jet channel. The central hole communicates with the through hole of the upper joint for introducing driving liquid. The first end of the jet channel communicates with the central hole, the second end of the jet channel extends to the outside of the driving member and reaches the side wall of the driving member, and there is a distance between the jet channel and the central axis of the driving member. The jet channel is configured to spray the liquid in the central hole from the side wall of the driving member into the inner cavity, so that the driving member rotates around the axis of the outer sleeve under the reaction force of the driving liquid and drives the first central member to rotate. The top of the lower joint is connected to the first central member, and the bottom of the lower joint is configured to be connected to the drill bit to drive the drill bit to rotate under the drive of the first central member.

[0008] Optionally, the rotary drive assembly further includes a second central member disposed on a side of the drive member facing the upper joint, and a top end of the second central member extends into a through hole of the upper joint, and a bottom end of the second central member is connected to the drive member.

[0009] Optionally, the second central member has a through hole extending axially along the outer sleeve, and the through hole communicates with the through hole and the central hole of the upper joint.

[0010] Optionally, both the first central member and the second central member are detachably connected to the drive member by trapezoidal threads.

[0011] Optionally, a top end of the second central member is exposed in the through hole of the upper joint, and a top end of the second central member has a wrench hole for inserting a driving tool.

[0012] Optionally, an outer side wall of the first central member has a flange extending outward in a circumferential direction of the first central member. A ring gap is provided between an inner cavity wall of the outer sleeve and the outer side wall of the first central member. A first communication hole communicating with the first central member is provided on a side wall of the flange, and the first communication hole is located on a side of the flange facing the lower joint. The first central member has a cavity with an open bottom, and a second communication hole communicating with the cavity is provided on a side wall of the first central member, and the second communication hole is located on a side of the flange facing the upper joint.

[0013] Optionally, the rotary drive assembly further includes a plurality of thrust bearings. The plurality of thrust bearings are sequentially arranged in the ring gap between the inner cavity wall of the outer sleeve and the outer side wall of the first central member along the axis of the outer sleeve. An inner ring of the thrust bearing is connected to the outer side wall of the first central member, and an outer ring of the thrust bearing is connected to the inner cavity wall of the outer sleeve.

[0014] Optionally, an inner cavity wall of the outer sleeve has an annular step, and the annular step has a step surface facing the lower joint side. An end surface of the thrust bearing closest to the upper joint among the plurality of thrust bearings abuts against the step surface.

[0015] Optionally, there are at least two jet channels, which are centrally symmetrically arranged with respect to the central hole, and a cross-section of the jet channel in a direction perpendicular to the axis of the outer sleeve is arc-shaped.

[0016] Optionally, a channel radius of the jet channel is 3.5 - 5 mm, and a distance between the jet channel and the central axis of the central hole is 15 - 25 mm.

[0017] The present invention provides a jet motor device, including an outer cylinder assembly and a rotary drive assembly, the outer cylinder assembly includes an upper joint, an outer sleeve and a lower joint, the rotary drive assembly includes a drive member and a first center member, the upper joint and the lower joint both have through holes, the top end of the outer sleeve is connected to the upper joint, and the inner cavity of the outer sleeve is connected to the through hole of the upper joint, the drive member and the first center member are both movably arranged in the inner cavity of the outer sleeve, the first center member is connected to the side of the drive member away from the upper joint, and the first center member is relatively fixed to the outer sleeve in the axial direction of the outer sleeve, the drive member has a center hole and a jet channel, the center hole is connected to the through hole of the upper joint for passing the drive liquid, The first end of the jet channel is connected to the center hole, and the second end of the jet channel extends to the outside of the driving member and to the side wall of the driving member, and there is a distance between the jet channel and the central axis of the driving member. The jet channel is configured to spray the liquid in the center hole from the side wall of the driving member into the inner cavity, so that the driving member rotates around the axis of the outer sleeve under the reaction force of the driving liquid, and drives the first center member to rotate. The top of the lower joint is connected to the first center member, and the bottom of the lower joint is configured to be connected to the drill bit to drive the drill bit to rotate under the drive of the first center member. There is no need to set a rotor and a stator, so that the jet motor device is not easily damaged during operation and has high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0019] Figure 1 A schematic structural diagram of a fluidic motor device provided in an embodiment of the present invention;

[0020] Figure 2 A cross-sectional view of a driving member provided in an embodiment of the present invention.

[0021] Description of reference numerals:

[0022] 100-jet motor device;

[0023] 200-drill bit;

[0024] 110-outer cylinder assembly;

[0025] 120-rotation drive assembly;

[0026] 111-upper connector;

[0027] 112-outer sleeve;

[0028] 113-lower connector;

[0029] 1111 - Through - hole of the upper joint;

[0030] 1121 - Inner cavity;

[0031] 1122 - Annular step;

[0032] 1123 - Step surface;

[0033] 1131 - Through - hole of the lower joint;

[0034] 121 - Driving part;

[0035] 122 - First central part;

[0036] 123 - Second central part;

[0037] 124 - Thrust bearing;

[0038] 1211 - Central hole;

[0039] 1212 - Jet channel;

[0040] 1221 - Flange;

[0041] 1222 - Cavity;

[0042] 1223 - First communication hole;

[0043] 1224 - Second communication hole;

[0044] 1231 - Through - hole;

[0045] 1232 - Lever - actuating hole. Detailed implementation manners

[0046] In order to make the above - mentioned objects, features, and advantages of the embodiments of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention.

[0047] The existing positive - displacement downhole motor drill is a positive - displacement downhole motor drill that uses liquid as power and converts liquid pressure energy into mechanical energy. Among them, the positive - displacement downhole motor drill includes a positive - displacement motor, a drill bit, and a connecting shaft. A rotor and a stator are arranged in the positive - displacement motor. Specifically, when high - pressure liquid enters the positive - displacement motor, it forces the rotor in the positive - displacement motor to roll in the stator, and the generated torque and rotational speed are transmitted to the transmission shaft and the drill bit through a universal joint shaft to achieve the purpose of drilling.

[0048] However, during the drilling operation, the rotor and stator of the positive displacement motor drill are prone to damage, which may further cause damage to the positive displacement motor drill and result in relatively low reliability.

[0049] To solve the above problems, the present invention provides a jet motor device, which includes an outer cylinder assembly and a rotary drive assembly. After the driving liquid enters the driving member of the rotary drive assembly, it is ejected from the side wall of the driving member into the inner cavity of the outer cylinder assembly, so that the driving member rotates under the reaction force of the driving liquid, and finally drives the drill bit to rotate. Without setting a rotor and a stator, the jet motor device is not easily damaged during operation and has relatively high reliability.

[0050] Now, in combination with the accompanying drawings and specific embodiments, the specific content of the present invention will be further described.

[0051] The existing positive displacement motor drill is a positive displacement downhole motor drill that uses liquid as power and converts liquid pressure energy into mechanical energy. Among them, the positive displacement motor drill includes a positive displacement motor, a drill bit, and a connecting shaft. A rotor and a stator are provided inside the positive displacement motor. Specifically, when high-pressure liquid enters the positive displacement motor, it forces the rotor in the positive displacement motor to roll in the stator. The generated torque and speed are transmitted to the transmission shaft and the drill bit through a universal joint to achieve the purpose of drilling. However, during the drilling operation, the rotor and stator are prone to damage, which may further cause damage to the positive displacement motor drill and result in relatively low reliability. The jet motor device of this solution includes an outer cylinder assembly and a rotary drive assembly. The outer cylinder assembly includes an upper joint, an outer sleeve, and a lower joint. The rotary drive assembly includes a first central member, a driving member, and a second central member. The driving member has a central hole and a jet channel. The driving liquid sequentially passes through an external pipeline, the upper joint, and the second central member and flows into the driving member. The driving liquid is ejected from the side wall of the driving member into the inner cavity through the jet channel, so that the driving member rotates around the axis of the outer sleeve under the reaction force of the driving liquid, and drives the first central member and the lower joint to rotate, and finally drives the drill bit to rotate. Without setting a rotor and a stator, the jet motor device is not easily damaged during operation and has relatively high reliability.

[0052] Figure 1 It is a schematic structural diagram of the jet motor device provided by the embodiment of the present invention. As Figure 1As shown, the jet motor device 100 includes an outer cylinder assembly 110 and a rotary drive assembly 120. The outer cylinder assembly 110 includes an upper joint 111, an outer sleeve 112, and a lower joint 113. The upper joint 111 is used to connect to an external pipeline for liquid to flow in. The lower joint 113 is used to connect to the drill bit 200 to drive the drill bit 200 to rotate. The rotary drive assembly 120 includes a drive member 121 and a first central member 122. Both the upper joint 111 and the lower joint 113 have through holes for liquid to pass through. The top of the outer sleeve 112 is connected to the upper joint 111, and the inner cavity 1121 of the outer sleeve 112 communicates with the through hole 1111 of the upper joint 111, so that the liquid in the upper joint 111 flows into the inner cavity 1121 of the outer sleeve 112. Both the drive member 121 and the first central member 122 are movably arranged in the inner cavity 1121 of the outer sleeve 112. The first central member 122 is connected to the side of the drive member 121 facing away from the upper joint 111 and is used to drive the rotary drive assembly 120 to rotate. The first central member 122 is axially fixed relative to the outer sleeve 112 to fix the rotary drive assembly 120 relative to the outer sleeve 112.

[0053] Furthermore, the drive member 121 has a central hole 1211 and a jet channel 1212. Figure 2 It is a cross-sectional view of the drive member provided by the embodiment of the present invention. As Figure 2 shown, the central hole 1211 communicates with the through hole 1111 of the upper joint 111 for introducing driving liquid. The first end of the jet channel 1212 communicates with the central hole 1211. The second end of the jet channel 1212 extends outward from the drive member 121 to the side wall of the drive member 121, and there is a spacing between the jet channel 1212 and the central axis of the drive member 121. The jet channel 1212 is configured to eject the liquid in the central hole 1211 from the side wall of the drive member 121 into the inner cavity 1121, so that the drive member 121 rotates around the axis of the outer sleeve 112 under the reaction force of the driving liquid and drives the first central member 122 to rotate. The top of the lower joint 113 is connected to the first central member 122, and the bottom of the lower joint 113 is configured to connect to the drill bit 200 to drive the drill bit 200 to rotate under the drive of the first central member 122.

[0054] Specifically, the driving liquid flows into the upper joint 111 through an external pipeline, and then flows into the driving member 121 through the through hole 1111 of the upper joint 111. The driving liquid in the driving member 121 is ejected from the side wall of the driving member 121 into the inner cavity 1121 of the outer sleeve 112 through the jet channel 1212. Under the reaction force of the driving liquid, the driving member 121 rotates around the axis of the outer sleeve 112, drives the first central member 122 to rotate, and then drives the lower joint 113 connected to the first central member 122 to rotate, and finally drives the drill bit 200 to rotate. There is no need to set a rotor and a stator, which can make the jet motor device not easily damaged during operation and have high reliability.

[0055] Optionally, the rotary drive assembly 120 further includes a second central member 123. The second central member 123 is disposed on the side of the driving member 121 facing the upper joint 111, and the top end of the second central member 123 extends into the through hole 1111 of the upper joint 111. The bottom end of the second central member 123 is connected to the driving member 121. Specifically, the second central member 123 is connected to the upper joint 111 and the driving member 121. The driving liquid flows into the upper joint 111 through an external pipeline, flows into the second central member 123 through the through hole 1111 of the upper joint 111, and then flows into the driving member 121 through the second central member 123 to realize the rotation of the driving member 121, and finally drives the drill bit 200 to rotate.

[0056] Optionally, the second central member 123 has a through hole 1231 extending along the axis of the outer sleeve 112. The through hole 1231 communicates with the through hole 1111 of the upper joint 111 and the central hole 1211. Specifically, after the driving liquid flows into the upper joint 111, due to the through hole 1231 of the second central member 123 extending along the axis of the outer sleeve 112, it flows into the second central member 123 through the through hole 1111 of the upper joint 111 along the through hole 1231, and then flows into the driving member 121 along the central hole 1211 through the through hole 1231 of the second central member 123 to drive the driving member 121 to rotate.

[0057] Optionally, both the first central member 122 and the second central member 123 are detachably connected to the driving member 121 by trapezoidal threads. On the one hand, since both the first central member 122 and the second central member 123 are connected to the driving member 121 by trapezoidal threads, the connections between the first central member 122 and the driving member 121 and between the second central member 123 and the driving member 121 are tight and not easily loosened. Moreover, compared with ordinary threads, the processability is better, the strength is higher, the wear resistance is good, and it can withstand a greater transmission force. On the other hand, since both the first central member 122 and the second central member 123 are detachably connected to the driving member 121, the first central member 122, the second central member 123 and the driving member 121 can be disassembled according to the use requirements for convenient carrying when not in use and assembled for the normal operation of the device when in use.

[0058] Optionally, the top end of the second central member 123 is exposed in the through hole 1111 of the upper joint 111, and the top end of the second central member 123 has a wrench hole 1232 for inserting a driving tool. Specifically, when assembling the jet motor device 100, it is necessary to first place the first central member 122 fixedly relative to the outer sleeve 112, and then sequentially place the driving member 121 and the second central member 123 from the upper joint 111 towards the lower joint 113. Since the overall length of the outer cylinder assembly 110 is relatively long and the rotary drive assembly 120 is disposed inside the outer cylinder assembly 110, it is relatively difficult to fix the rotary drive assembly 120 from inside the outer cylinder assembly 110. Therefore, the top end of the second central member 123 is exposed in the through hole 1111 of the upper joint 111, and the top end of the second central member 123 is provided with a wrench hole 1232 for inserting a driving tool. During the assembly process, by inserting the external driving tool into the wrench hole 1232, the second central member 123 is driven to rotate, thereby driving the driving member 121 and the first central member 122 to rotate until the first central member 122, the driving member 121, and the second central member 123 are tightly fixed, and then the external driving tool is pulled out from the wrench hole 1232.

[0059] Optionally, the outer sidewall of the first central member 122 has a flange 1221 extending outward along the circumferential direction of the first central member 122. A spacer ring is provided between the flange 1221 and the outer sleeve 112. There is an annular gap between the inner cavity wall of the outer sleeve 112 and the outer sidewall of the first central member 122 along the flange 1221. Among them, the spacer ring is used to isolate the flange 1221 from the outer sleeve 112 to form the annular gap, so as to avoid direct contact between the first central member 122 and the outer sleeve 112, reduce the friction between the first central member 122 and the outer sleeve 112, and the spacer ring and the flange 1221 jointly limit the axial displacement of the thrust bearing 124. A first communication hole 1223 communicating with the first central member 122 is provided on the sidewall of the flange 1221. The first communication hole 1223 is located on the side of the flange 1221 facing the lower joint 113. Liquid can flow into the first central member 122 through the first communication hole 1223 at the lower end of the flange 1221. The first central member 122 has a cavity 1222, the bottom of the cavity 1222 is open, and a second communication hole 1224 communicating with the cavity 1222 is provided on the sidewall of the first central member 122. The second communication hole 1224 is located on the side of the flange 1221 facing the upper joint 111.

[0060] Specifically, since the first central member 122 has a cavity 1222 and a second communication hole 1224 communicating with the cavity 1222 is provided on the side wall of the first central member 122, the liquid sprayed from the driving member 121 into the inner cavity 1121 of the outer sleeve 112 can enter the cavity 1222 of the first central member 122 through the second communication hole 1224 on the side wall of the first central member 122, and then flow to the lower joint 113 through the through hole 1131 of the lower joint, and finally flow to the drill bit 200 for the drill bit 200 to spray out during rotary operation. Among them, the driving liquid sprayed during the rotation of the drill bit 200 can reduce the friction and temperature of the drill bit 200 to protect the drill bit 200 and can reduce the pollution caused by the flying dust.

[0061] Optionally, the rotary drive assembly 120 further includes a plurality of thrust bearings 124. The plurality of thrust bearings 124 are sequentially arranged along the axial direction of the outer sleeve 112 in the annular gap between the inner cavity wall 1121 of the outer sleeve 112 and the outer side wall of the first central member 122. The inner ring of the thrust bearing 124 is connected to the outer side wall of the first central member 122, and the outer ring of the thrust bearing 124 is connected to the inner cavity wall 1121 of the outer sleeve 112. Specifically, the plurality of thrust bearings 124 are arranged in the annular gap between the inner cavity wall 1121 of the outer sleeve 112 and the outer side wall of the first central member 122. On the one hand, during the rotation of the first central member 122, it can play a role of radial support for the first central member 122, so that the first central member 122 does not shift during rotation, and further the driving member 121, the second central member 123, the lower joint 113 and the drill bit 200 do not shift. On the other hand, during the rotation of the first central member 122, the plurality of thrust bearings 124 can reduce the friction between the first central member 122 and the side wall of the outer sleeve 112, making the rotation of the first central member 122 smoother.

[0062] Optionally, an annular step 1122 is provided on the inner wall of the inner cavity 1121 of the outer sleeve 112. The annular step 1122 has a step surface 1123 facing the lower joint 113. The end surface of the thrust bearing 124 closest to the upper joint 111 among the plurality of thrust bearings 124 abuts against the step surface 1123. Specifically, during the rotation of the plurality of thrust bearings 124, since the end surface of the thrust bearing 124 closest to the upper joint 111 among the plurality of thrust bearings 124 abuts against the step surface 1123, the displacement of the plurality of thrust bearings 124 in the direction of the step surface 1123 is restricted. And because the outer side wall of the first central member 122 has a flange 1221 extending outward along the circumferential direction of the first central member 122, the flange 1221 abuts against the end surface of the thrust bearing 124 closest to the lower joint 113 among the plurality of thrust bearings 124, restricting the displacement of the plurality of thrust bearings 124 in the opposite direction of the step surface 1123. Therefore, under the combined action of the step surface 1123 and the flange 1221, the displacement of the plurality of thrust bearings 124 along the axial direction of the outer sleeve 112 is restricted.

[0063] Optionally, there are at least two jet channels 1212, which are centrally symmetrically arranged with respect to the central hole 1211. The cross-section of the jet channel 1212 in the direction perpendicular to the axis of the outer sleeve 112 is arc-shaped. Specifically, since there are at least two jet channels 1212 and they are centrally symmetrically arranged with respect to the central hole 1211, when the driving liquid is ejected through the jet channels 1212 into the inner cavity 1121, the driving liquid is evenly stressed in each jet channel 1212, and the driving member 121 is also evenly stressed by the reaction force of the driving liquid, enabling the driving member 121 to rotate stably. Since the cross-section of the jet channel 1212 in the direction perpendicular to the axis of the outer sleeve 112 is arc-shaped, when the driving member 121 rotates, the driving liquid can be ejected along the direction of the arc, reducing the force resisting the ejection of the driving liquid and the torque under the reaction force of the driving liquid, providing a greater torque and enabling the driving member 121 to rotate faster.

[0064] Optionally, the channel radius of the jet channel 1212 is 3.5 - 5 mm, and the distance between the jet channel 1212 and the central axis of the central hole 1211 is 15 - 25 mm. Specifically, by setting the channel radius of the jet channel 1212 to 3.5 - 5 mm and the distance between the jet channel 1212 and the central axis of the central hole 1211 to 15 - 25 mm, the driving liquid can provide the maximum reaction force during the process of being ejected from the side wall of the driving member 121 into the inner cavity 1121, so as to drive the driving member 121 to rotate rapidly.

[0065] The working process of the jet motor device 100 provided by the present invention is as follows: The jet motor device 100 includes an outer cylinder assembly 110 and a rotary drive assembly 120. The outer cylinder assembly 110 includes an upper joint 111, an outer sleeve 112, and a lower joint 113. The rotary drive assembly 120 is disposed within the outer sleeve 112. The rotary drive assembly 120 includes a first central member 122, a drive member 121, and a second central member 123. Specifically, after the driving liquid enters the upper joint 111 through an external pipeline, it flows into the second central member 123 and the drive member 121 in sequence. On the one hand, the driving liquid flowing into the drive member 121 is ejected from the side wall of the drive member 121 into the inner cavity 1121 of the outer sleeve 112, so that the drive member 121 rotates, and then drives the first central member 122 and the lower joint 113 to rotate. Finally, it drives the drill bit 200 connected to the lower joint 113 to rotate, realizing the rotary operation of the drill bit 200. Without setting a rotor and a stator, the drilling operation can be carried out normally. On the other hand, the driving liquid flowing into the drive member 121 is ejected into the inner cavity 1121 of the outer sleeve 112, and then flows into the cavity 1222 of the first central member 122 through the second communication hole 1224 of the first central member 122, and then flows into the lower joint 113 connected to the first central member 122 through the through hole 1131 of the lower joint, and finally flows to the drill bit 200 for the drill bit 200 to eject during the rotary operation.

[0066] The jet motor device provided by the present invention includes an outer cylinder assembly and a rotary drive assembly. The outer cylinder assembly includes an upper joint, an outer sleeve, and a lower joint. The rotary drive assembly includes a drive member and a first central member. Both the upper joint and the lower joint have through holes. The top of the outer sleeve is connected to the upper joint, and the inner cavity of the outer sleeve communicates with the through hole of the upper joint. The drive member and the first central member are both movably disposed within the inner cavity of the outer sleeve. The first central member is connected to the side of the drive member facing away from the upper joint, and the first central member is relatively fixed to the outer sleeve in the axial direction of the outer sleeve. The drive member has a central hole and a jet channel. The central hole communicates with the through hole of the upper joint for introducing the driving liquid. The first end of the jet channel communicates with the central hole, and the second end of the jet channel extends outward from the drive member to the side wall of the drive member. There is a distance between the jet channel and the central axis of the drive member. The jet channel is configured to eject the liquid in the central hole from the side wall of the drive member into the inner cavity, so that the drive member rotates around the axis of the outer sleeve under the reaction force of the driving liquid and drives the first central member to rotate. The top of the lower joint is connected to the first central member, and the bottom of the lower joint is configured to be connected to the drill bit to drive the drill bit to rotate under the drive of the first central member. Without setting a rotor and a stator, the jet motor device is not easily damaged during operation and has high reliability.

[0067] In the description of the present invention, it should be understood that the terms "center", "length", "width", "thickness", "top", "bottom", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", "axial", "circumferential", etc. indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated position or component must have a specific orientation, be constructed and operated in a specific manner, and thus should not be construed as a limitation to the present invention.

[0068] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0069] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0070] In the present invention, unless otherwise clearly defined and limited, terms such as "mount", "set", "connect", "fix", "swivel connection", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and may be the communication inside two components or the interaction relationship between two components. Unless otherwise clearly limited, for those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0071] 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 foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A jet motor device, characterized in that, The invention comprises an outer cylinder assembly and a rotary drive assembly; the outer cylinder assembly comprises an upper joint, an outer sleeve and a lower joint; the rotary drive assembly comprises a driving member and a first center member; the upper joint and the lower joint both have through holes, the top end of the outer sleeve is connected to the upper joint, and the inner cavity of the outer sleeve is in communication with the through hole of the upper joint; The driving member and the first center member are both movably disposed in the inner cavity of the outer sleeve, the first center member is connected to a side of the driving member facing away from the upper joint, and the first center member is fixed relative to the outer sleeve in the axial direction of the outer sleeve; The driving member has a center hole and a jet channel, the center hole is connected to the through hole of the upper joint for introducing driving liquid, a first end of the jet channel is connected to the center hole, and a second end of the jet channel is toward the outside of the driving member and extends to the side wall of the driving member, and there is a distance between the jet channel and the center axis of the driving member, and the jet channel is configured to spray the liquid in the center hole from the side wall of the driving member into the inner cavity, so that the driving member rotates around the axis of the outer sleeve under the reaction force of the driving liquid and drives the first center member to rotate; the top of the lower joint is connected to the first center member, and the bottom of the lower joint is configured to be connected to the drill bit, so as to drive the drill bit to rotate under the drive of the first center member; The outer side wall of the first center piece has a flange extending outward along the circumference of the first center piece, and an annular gap is provided between the flange and the outer side wall of the first center piece along the inner cavity wall of the outer sleeve, and a first communicating hole connected to the first center piece is provided on the side wall of the flange, and the first communicating hole is located on the side of the flange facing the lower joint; the first center piece has a cavity, the bottom of the cavity is open, and a second communicating hole connected to the cavity is provided on the side wall of the first center piece, and the second communicating hole is located on the side of the flange facing the upper joint.

2. The jet motor device according to claim 1, wherein The rotary drive assembly also includes a second center piece, which is arranged on the side of the drive member facing the upper joint, and the top end of the second center piece extends into the through hole of the upper joint, and the bottom end of the second center piece is connected to the drive member.

3. The jet motor device according to claim 2, wherein, The second center piece has a through hole extending axially along the outer sleeve, and the through hole communicates with the through hole of the upper joint and the center hole.

4. The jet motor device according to any one of claims 2 or 3, characterized in that, The first center piece and the second center piece are both detachably connected to the driving piece via trapezoidal threads.

5. The jet motor device according to any one of claims 2 or 3, characterized in that, The top end of the second center piece is exposed in the through hole of the upper joint, and the top end of the second center piece is provided with a wrench hole for inserting a driving tool.

6. The jet motor device according to claim 1, characterized in that, The rotary drive assembly also includes a plurality of thrust bearings, which are sequentially arranged in the annular gap between the inner cavity wall of the outer sleeve and the outer wall of the first center piece along the axial direction of the outer sleeve, and the inner ring of the thrust bearing is connected to the outer wall of the first center piece, and the outer ring of the thrust bearing is connected to the inner cavity wall of the outer sleeve.

7. The jet motor device according to claim 6, characterized in that, The inner cavity wall of the outer sleeve has an annular step, and the annular step has a step surface facing the lower joint side. The end face of the thrust bearing closest to the upper joint among the plurality of thrust bearings abuts against the step surface.

8. The jet motor device according to any one of claims 1-3, characterized in that, There are at least two jet channels, and they are centrally symmetrically arranged with respect to the central hole; the cross-section of the jet channel in the direction perpendicular to the axis of the outer sleeve is arc-shaped.

9. The jet motor device according to claim 8, wherein, The channel radius of the jet channel is 3.5 - 5 mm, and the distance between the jet channel and the central axis of the central hole is 15 - 25 mm.

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