Pulse type unblocking device

Abstract

The invention discloses a pulse type unblocking device, which comprises a cylindrical shell, a cylindrical core part, an elastic piece and a nozzle, and is characterized in that the cylindrical core part is movably arranged in the cylindrical shell and can be switched between a first position and a second position along the axial direction of the cylindrical shell; the nozzle is arranged on the cylindrical shell, and a preset included angle is formed between the nozzle and the radial direction of the cylindrical shell in the circumferential direction of the cylindrical shell; a connecting hole is formed in the barrel wall of the barrel-shaped core part; the elastic piece is elastically connected between the cylindrical core part and the cylindrical shell, and the elastic piece is used for driving the cylindrical core part to move to a first position; the unblocking liquid entering the cylindrical shell is used for driving the cylindrical core part to overcome the elastic force of the elastic piece to move to a second position; when the cylindrical core part moves to a second position, the connecting hole is communicated with the nozzle, so that the unblocking liquid entering the cylindrical core part sequentially passes through the connecting hole and the nozzle to be sprayed out of the cylindrical shell; and when the cylindrical core part moves to the first position, the connecting hole is blocked by the inner wall of the cylindrical shell, so that the connecting hole is isolated from the nozzle.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil field plugging removal tool design, and particularly relates to a pulse type plugging removal device. BACKGROUND

[0002] In the process of oil field production, plugging often occurs in oil wells, and various reasons cause the plugging of oil wells, which will lead to reduced production. In order not to affect the production of oil wells, plugging removal operation needs to be performed on the oil wells.

[0003] The related art removes the plugging by lowering a plugging removal device into an oil well and spraying a plugging removal liquid (such as water) from the plugging removal device to flush the well wall of the oil well to remove the plugging material, so as to achieve the purpose of plugging removal. Therefore, the plugging removal efficiency of the plugging removal device is crucial, and relates to the speed of resuming production of the oil well. However, the plugging removal device involved in the related art has the problem of low flushing efficiency when removing the plugging because the plugging removal liquid is sprayed along the radial direction of the oil well to the well wall. In order to improve the plugging removal efficiency, the related art increases the flushing efficiency by increasing the liquid output of the plugging removal liquid, but in actual application, the plugging removal efficiency of the plugging removal device is still poor.

[0004] In the current environment of increasingly efficient production, how to better improve the plugging removal efficiency of the plugging removal device is related to the oil field production capacity and the oil field benefit, and is a technical problem to be urgently researched and solved by those skilled in the art. SUMMARY

[0005] The embodiments of the present application disclose a pulse type plugging removal device to solve the problem of poor plugging removal efficiency of the plugging removal device involved in the related art.

[0006] To solve the above technical problems, the embodiments of the present application disclose the following technical solutions:

[0007] A pulse type plugging removal device, comprising a cylindrical shell, a cylindrical core, an elastic member and a nozzle, wherein the cylindrical core is movably arranged in the cylindrical shell and can be switched between a first position and a second position along the axial direction of the cylindrical shell;

[0008] The nozzle is arranged on the cylindrical shell and has a preset included angle with the radial direction of the cylindrical shell in the circumferential direction of the cylindrical shell; the cylindrical wall of the cylindrical core is provided with a connecting hole; the elastic member is elastically connected between the cylindrical core and the cylindrical shell, and is used to drive the cylindrical core to move to the first position; the plugging removal liquid entering the cylindrical shell is used to drive the cylindrical core to move to the second position against the elastic force of the elastic member;

[0009] When the cylindrical core moves to the second position, the connecting hole communicates with the nozzle, so that the unblocking liquid entering the cylindrical core is sprayed out of the cylindrical shell through the connecting hole and the nozzle in sequence; when the cylindrical core moves to the first position, the connecting hole is blocked by the inner wall of the cylindrical shell, so that the connecting hole is isolated from the nozzle.

[0010] Optionally, there are multiple nozzles, which are spaced apart along the circumferential direction of the cylindrical outer shell; there are multiple connecting holes, which are spaced apart along the circumferential direction of the cylindrical core.

[0011] Optionally, the cylindrical outer shell includes a cylindrical oil pipe connection and a cylindrical outer shell body, the outer shell body being rotatably connected to the oil pipe connection, and the cylindrical core being slidably disposed within the outer shell body to switch between the first position and the second position; the nozzle is disposed on the outer shell body;

[0012] The elastic element is disposed between the outer shell body and the cylindrical core; the outer shell body can drive the cylindrical core, the elastic element and the nozzle to rotate relative to the oil pipe connection in a direction about the axial direction.

[0013] Optionally, the oil pipe connection is fitted to the outer casing body via a spherical hinge.

[0014] Optionally, the oil pipe connection includes a first cylindrical hinge portion, the first end of the first cylindrical hinge portion includes a spherical protrusion, the outer shell body includes a first connecting sleeve and a cylindrical valve shell portion, the cylindrical core portion is slidably disposed within the valve shell portion, the elastic element is disposed between the cylindrical core portion and the valve shell portion, and the nozzle is disposed on the valve shell portion; the first connecting sleeve is connected to the cylindrical valve shell portion, and the inner wall of the joint between the two forms a spherical depression, the spherical protrusion is spherically hinged to the spherical depression.

[0015] Optionally, the valve housing includes a housing body, a connecting sleeve, a spring sleeve, and a lower connector that are sequentially fixed and coaxially connected along the axial direction; the cylindrical core, the spring sleeve, the lower connector, and the connecting sleeve form a receiving space, the elastic element is located in the receiving space, the elastic element extends along the axial direction, and both ends of the elastic element are respectively in positional contact with the lower connector and the cylindrical core; the nozzle is disposed on the housing body.

[0016] Optionally, the first end of the connecting sleeve extends into the shell body, and the cylindrical core includes a limiting protrusion. When the cylindrical core is in the second position, the cylindrical core is limited and engaged by the limiting protrusion to make limiting contact with the end face of the first end of the connecting sleeve.

[0017] Optionally, the shell body has a limiting step surface, and when the cylindrical core is in the first position, the cylindrical core is limited and engaged by the limiting protrusion and the limiting step surface.

[0018] Optionally, the valve housing further includes a protective sleeve, which is fitted over the main body of the housing and fixedly connected to the main body of the housing. The nozzle is positioned between the protective sleeve and the main body of the housing, and the protective sleeve has a clearance hole for unblocking fluid opposite to the nozzle.

[0019] Optionally, the protective sleeve is fixed to the shell body by a connector. The shell body is provided with an annular groove extending around the axial direction. The end of the annular groove facing away from the connecting sleeve is a closed end, and the end of the annular groove facing the connecting sleeve is an open end. The two ends of the protective sleeve are respectively in positioning contact with the groove wall of the connecting sleeve and the closed end of the annular groove.

[0020] The technical solutions disclosed in the embodiments of the present invention have the following technical effects:

[0021] In the pulse-type unblocking device disclosed in this invention embodiment, since the radial direction of the nozzle and the cylindrical shell has a preset angle in the circumferential direction of the cylindrical shell, the unblocking fluid sprayed from the nozzle has both radial and circumferential components. At this time, the unblocking fluid can cut the well wall outside the cylindrical shell. The pulse-type unblocking device disclosed in this invention embodiment can not only spray the unblocking fluid radially, but also spray the unblocking fluid circumferentially, which can improve the flushing ability of foreign objects on the well wall and ultimately improve the unblocking efficiency. Attached Figure Description

[0022] Figure 1 This is a half-sectional structural diagram of the pulse unblocking device disclosed in an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram showing the nozzle orientation of the pulse unblocking device disclosed in an embodiment of the present invention. Figure 2 The circle in the diagram indicates the circumferential direction of the cylindrical outer shell 10, the arrow X indicates the radial direction of the cylindrical outer shell 10, and the arrow Y indicates the spray direction of the nozzle 40.

[0024] The components in the diagram are labeled as follows:

[0025] 10-Cylindrical outer shell, 11-Oil pipe connection, 111-First cylindrical hinge, 112-Upper connector, 12-Outer shell body, 121-First connecting sleeve, 122-Valve shell, 1221-Shell body, 1221a-Limiting step surface, 1221b-Annular groove, 1222-Connecting sleeve, 1223-Spring sleeve, 1224-Lower connector, 1225-Accommodation space, 1226-Protective sleeve, 1227-Connector,

[0026] 20-Cylindrical core, 21-Connecting hole, 22-Limiting protrusion, 201-Core body, 202-Mounting base,

[0027] 30-Elastic component,

[0028] 40-nozzle. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0030] The technical solutions disclosed in the various embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0031] Please refer to Figure 1 and Figure 2 This invention discloses a pulse-type unblocking device. This pulse-type unblocking device includes a cylindrical outer shell 10, a cylindrical core 20, an elastic element 30, and a nozzle 40.

[0032] The cylindrical housing 10 is the housing of the pulse-type unblocking device. The cylindrical housing 10 can be a cylindrical structure. Other components of the pulse-type unblocking device can be directly or indirectly installed on the cylindrical housing 10.

[0033] The cylindrical core 20 is one of the core components of the pulse-type unblocking device, and it is housed within the cylindrical outer casing 10. The cylindrical core 20 and the cylindrical outer casing 10 are coaxially arranged. Specifically, the cylindrical core 20 is movably disposed within the cylindrical outer casing 10 and can switch between a first position and a second position along the axial direction of the cylindrical outer casing 10. It should be noted that the axial direction of the cylindrical outer casing 10 refers to the direction in which the axis of the cylindrical outer casing 10 extends.

[0034] Nozzle 40 is a structural component capable of ejecting the introduced unblocking fluid at a high pressure. Nozzle 40 can be an existing high-pressure nozzle; this embodiment of the invention does not limit the specific type of nozzle 40. Specifically, nozzle 40 is disposed on the cylindrical outer shell 10 and is radially (i.e., ...) of the cylindrical outer shell 10. Figure 2 The direction indicated by the middle arrow X) is in the circumferential direction of the cylindrical outer shell 10 (i.e. Figure 2 The circumferential direction shown in the middle circle has a preset included angle α, that is, the spray direction of nozzle 40 (i.e., Figure 2 The direction indicated by the arrow Y in the figure) is radial to the cylindrical outer shell 10 (i.e., Figure 2 The directions indicated by the middle arrow X do not coincide, and the two have a preset angle α in the circumferential direction of the cylindrical outer shell 10. The preset angle α is not zero and can be 10°, 15°, 45°, etc. The specific size of the preset angle is not limited in the embodiments of the present invention.

[0035] The cylindrical core 20 has a connecting hole 21 on its cylindrical wall. Specifically, the connecting hole 21 extends from the inner surface of the cylindrical core 20 through the cylindrical wall of the cylindrical core 20 to the outer surface of the cylindrical wall of the cylindrical core 20.

[0036] An elastic element 30 is elastically connected between the cylindrical core 20 and the cylindrical outer shell 10, and is used to drive the cylindrical core 20 to move to a first position. The elastic element 30 can be a helical spring or an elastic rubber cylinder, etc., and the specific type of the elastic element 30 is not limited in the embodiments of the present invention.

[0037] The unblocking fluid entering the cylindrical outer shell 10 is used to drive the cylindrical core 20 to overcome the elastic force of the elastic member 30 and move to the second position. Specifically, the structure of the cylindrical core 20 can be designed so that the end face areas of the two ends of the cylindrical core 20 are unequal, thereby creating a difference in the hydraulic pressure of the unblocking fluid at the two ends of the cylindrical core 20. This allows the cylindrical outer shell 10 to be driven by the unblocking fluid to overcome the elastic force of the elastic member 30 and move to the second position. Of course, the unblocking fluid has a certain pressure. Unblocking fluid with a certain pressure can achieve the above-mentioned driving function. Those skilled in the art can reasonably design the pressure of the unblocking fluid during the unblocking operation so that the pressure of the unblocking fluid at least meets the above requirements. The embodiments of the present invention do not limit the pressure of the unblocking fluid.

[0038] When the cylindrical core 20 moves to the second position, the connecting hole 21 communicates with the nozzle 40, so that the unblocking fluid entering the cylindrical core 20 is sprayed out of the cylindrical outer shell 10 through the connecting hole 21 and the nozzle 40 in sequence. The unblocking fluid sprayed out of the cylindrical outer shell 10 can flush the well wall of the wellbore, thereby removing the blockage.

[0039] When the cylindrical core 20 moves to the first position, the connecting hole 21 is blocked by the inner wall of the cylindrical outer shell 10, thereby isolating the connecting hole 21 from the nozzle 40. In this case, the unblocking fluid can no longer pass through the connecting hole 21 and be sprayed out from the nozzle 40.

[0040] The working process of the pulse-type unblocking device disclosed in this embodiment of the invention is as follows: the unblocking fluid is delivered into the cylindrical shell 10. The unblocking fluid changes in a pulsed (i.e., periodically) manner with a preset pressure. When the pressure of the unblocking fluid reaches the preset pressure, the driving force of the unblocking fluid on the cylindrical core 20 is large, thereby overcoming the elastic force of the elastic element 30 and allowing the cylindrical core 20 to move to the second position. This allows the connecting hole 21 to communicate with the nozzle 40, so that the unblocking fluid in the cylindrical cavity of the cylindrical core 20 can be sprayed out of the cylindrical shell 10 through the connecting hole 21 and the nozzle 40 in sequence. The unblocking fluid sprayed out of the cylindrical shell 10 will scour the well wall. Since the spraying direction of the nozzle 40 has a preset angle with the radial direction of the cylindrical shell 10 in the circumferential direction, the unblocking fluid has a radial component and a circumferential component when it is sprayed out.

[0041] After the unblocking operation is completed, the unblocking fluid is consumed or the ground equipment stops supplying the unblocking fluid. The unblocking fluid remaining in the cylindrical shell 10 is insufficient to overcome the elastic force of the elastic element 30. In this case, the elastic element 30 drives the cylindrical core 20 to move to the first position, thereby causing the connecting hole 21 to be blocked by the inner wall of the cylindrical shell 10. At this time, the connecting hole 21 is isolated from the nozzle 40, and the unblocking fluid will no longer be sprayed out, and the unblocking operation is completed.

[0042] In the pulse-type unblocking device disclosed in this embodiment of the invention, since the radial direction of the nozzle 40 and the cylindrical shell 10 has a preset angle in the circumferential direction of the cylindrical shell 10, the unblocking fluid sprayed from the nozzle 40 has a radial component and a circumferential component. At this time, the unblocking fluid can not only impact the well wall of the wellbore radially, but also cut the well wall outside the cylindrical shell 10. It can be seen that the pulse-type unblocking device disclosed in this embodiment of the invention can not only spray the unblocking fluid radially, but also spray the unblocking fluid circumferentially. This can improve the flushing ability of the blockage on the well wall, and ultimately improve the unblocking efficiency.

[0043] In this embodiment of the invention, there may be one or more nozzles 40, and the number of nozzles 40 is not limited. Correspondingly, there may be one or more connecting holes 21, and the number of connecting holes 21 is also not limited. To further improve the unblocking efficiency, in one example, there are multiple nozzles 40, which are spaced apart along the circumference of the cylindrical outer shell 10. There are also multiple connecting holes 21, which are spaced apart along the circumference of the cylindrical core 20. Specifically, the nozzles 40 and connecting holes 21 can be connected in a one-to-one, one-to-many, or many-to-one manner. This undoubtedly improves the spraying efficiency of the unblocking fluid, thus contributing to improved unblocking efficiency.

[0044] In this embodiment of the invention, the cylindrical outer shell 10 can be a one-piece cylindrical structure or a combination of multiple separate cylindrical components assembled together; the embodiment of the invention does not impose any limitations. In one example, the cylindrical outer shell 10 may include a cylindrical oil pipe connection portion 11 and a cylindrical outer shell body 12. The oil pipe connection portion 11 is used to connect to an oil pipe. The outer shell body 12 is rotatably connected to the oil pipe connection portion 11, thereby allowing the outer shell body 12 to rotate about the axial direction of the cylindrical outer shell 10. In this case, the cylindrical core portion 20 can be slidably disposed within the outer shell body 12 to switch between a first position and a second position. The nozzle 40 may be disposed on the outer shell body 12.

[0045] An elastic element 30 is disposed between the outer shell body 12 and the cylindrical core 20. Specifically, the elastic element 30 can be sleeved outside the cylindrical core 20, thereby improving its expansion and contraction stability. The outer shell body 12 can drive the cylindrical core 20, the elastic element 30, and the nozzle 40 to rotate relative to the tubing connection 11 in the axial direction around the cylindrical shell 10. This structure enables the pulse-type unblocking device to rotatably spray unblocking fluid during operation, which can further improve the cutting and scouring ability of the sprayed unblocking fluid on the blockage in the wellbore.

[0046] In this embodiment of the invention, the outer shell body 12 and the oil pipe connection part 11 can be rotatably connected by bearings or by other means. In one example, the oil pipe connection part 11 can be engaged with the outer shell body 12 by a spherical hinge. The spherical hinge can improve the degree of freedom of the rotatable connection, thereby facilitating the better rotation of the outer shell body 12 around the axial direction.

[0047] There are various structures for achieving a spherical hinge fit. For ease of installation, in a specific example, the oil pipe connection 11 may include a first cylindrical hinge part 111. The first end of the first cylindrical hinge part 111 may include a spherical protrusion. The outer shell body 12 may include a first connecting sleeve 121 and a cylindrical valve shell part 122. The cylindrical core part 20 is slidably disposed within the valve shell part 122. The elastic element 30 may be disposed between the cylindrical core part 20 and the valve shell part 122. The nozzle 40 may be disposed on the valve shell part 122. The first connecting sleeve 121 is connected to the valve shell part 122, and a spherical depression is formed inside the joint between the two. The spherical protrusion and the spherical depression are spherically hinged. Optionally, the first connecting sleeve 121 and the valve shell part 122 may be sleeved and connected by a threaded fit. Of course, the two can also be connected by a flange structure. The embodiments of the present invention do not limit the specific connection method between the first connecting sleeve 121 and the valve shell part 122.

[0048] In a further embodiment, the tubing connection 11 may further include an upper connector 112, which can be threadedly fixedly connected to the first cylindrical hinge portion 111. The upper connector 112 is used to be fixedly connected to the tubing through a threaded engagement. Specifically, the upper connector 112 is used to be threadedly connected to one section of tubing, and the lower connector 1224 described later can be threadedly connected to another section of tubing, thereby enabling the pulse-type unblocking device disclosed in this embodiment of the invention to perform unblocking while drilling.

[0049] In this embodiment of the invention, the valve housing 122 can have various structures. To better protect the elastic element 30, in one example, the valve housing 122 may include a housing body 1221, a connecting sleeve 1222, a spring sleeve 1223, and a lower connector 1224, which are sequentially fixedly connected along the axial direction. Specifically, adjacent components of the housing body 1221, connecting sleeve 1222, spring sleeve 1223, and lower connector 1224 are detachably connected by threaded connections. This structure facilitates the disassembly, assembly, maintenance, and replacement of local components, and also facilitates local maintenance of the pulse-type unblocking device.

[0050] Furthermore, the cylindrical core 20, spring sleeve 1223, lower connector 1224, and connecting sleeve 1222 can form a receiving space 1225, in which the elastic element 30 can be located. The elastic element 30 extends axially along the cylindrical outer shell 10, and its two ends are respectively in positional contact with the lower connector 1224 and the cylindrical core 20. The nozzle 40 can be disposed on the shell body 1221. This structure can form a space specifically for accommodating the elastic element 30, which is beneficial for protecting the elastic element 30, preventing damage to the elastic element 30, and extending the service life of the elastic element 30.

[0051] In one embodiment, the first end of the connecting sleeve 1222 can extend into the shell body 1221, and the cylindrical core 20 can include a limiting protrusion 22. When the cylindrical core 20 is in the second position, the cylindrical core 20 is limited and engaged by the limiting protrusion 22 and the end face of the first end of the connecting sleeve 1222. This structure can limit the cylindrical core 20 by the connecting sleeve 1222, thereby preventing the cylindrical core 20 from moving excessively when moving to the second position. It can be seen that the connecting sleeve 1222 can also play the function of limiting and engaging with the cylindrical core 20.

[0052] Optionally, the shell body 1221 may have a limiting step surface 1221a. When the cylindrical core 20 is in the first position, the cylindrical core 20 is limited and engaged by the limiting protrusion and the limiting step surface 1221a, thereby preventing the cylindrical core 20 from moving excessively when moving to the first position. It can be seen that the shell body 1221 can also play the function of limiting and engaging with the cylindrical core 20.

[0053] In the pulse-type unblocking device disclosed in this embodiment of the invention, the valve housing 122 may further include a protective sleeve 1226. The protective sleeve 1226 can be fitted over the housing body 1221 and fixedly connected to the housing body 1221. The nozzle 40 can be positioned between the protective sleeve 1226 and the housing body 1221. The protective sleeve 1226 has an unblocking fluid clearance hole opposite to the nozzle 40. Specifically, the housing body 1221 may have an installation hole, and the nozzle 40 is disposed in the installation hole and cooperates with the protective sleeve 1226. Under the restriction of the protective sleeve 1226, the nozzle 40 will not fall out of the installation hole. The protective sleeve 1226 not only functions as the nozzle 40, but also assists in the installation of the nozzle 40.

[0054] In this embodiment of the invention, the protective sleeve 1226 can be fixed to the shell body 1221 by means of the connector 1227. The shell body 1221 is provided with an annular groove 1221b extending axially around the cylindrical outer shell 10. The end of the annular groove 1221b facing away from the connecting sleeve 1222 can be a closed end, and the end of the annular groove 1221b facing the connecting sleeve 1222 can be an open end. The two ends of the protective sleeve 1226 can respectively make positioning contact with the groove walls of the connecting sleeve 1222 and the closed end of the annular groove 1221b. This structure enables the protective sleeve 1226 to be embedded, thereby improving the installation stability of the protective sleeve 1226. Optionally, the connector 1227 can be a screw or a pin, and this embodiment of the invention does not limit the specific type of connector 1227.

[0055] In this embodiment of the invention, the cylindrical core 20 may include a core body 201 and a mounting base 202 axially joined together along the cylindrical outer shell 10, both of which are cylindrical structures. Optionally, the core body 201 and the mounting base 202 may be detachably connected by a threaded connection. The mounting base 202 is used to mount the elastic element 30, and the core body 201 has a connecting hole 21. The core body 201 may include the limiting protrusion 22 mentioned above. Figure 1 As shown, the elastic element 30 can be positioned between the mounting base 202 and the lower connector 1224. Specifically, the end of the mounting base 202 away from the lower connector 1224 is provided with an annular flange, and the lower connector 1224 is provided with an annular surface. The elastic element 30 is sleeved on the mounting base 202, and both ends of the elastic element 30 abut against the annular flange and the annular surface, respectively, thereby achieving installation. Of course, in this case, the mounting base 202, the lower connector 1224, and the spring sleeve 1223 can form an accommodating space 1225.

[0056] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of the present invention.

Claims

1. A device for pulse unblocking, characterized in that, The device comprises a cylindrical shell (10), a cylindrical core (20), an elastic member (30) and a nozzle (40), wherein the cylindrical core (20) is movably arranged in the cylindrical shell (10) and can be switched between a first position and a second position along the axial direction of the cylindrical shell (10); The nozzle (40) is arranged on the cylindrical shell (10) and has a preset included angle with the radial direction of the cylindrical shell (10) in the circumferential direction of the cylindrical shell (10); the cylindrical wall of the cylindrical core (20) is provided with a connecting hole (21); the elastic member (30) is elastically connected between the cylindrical core (20) and the cylindrical shell (10), and is used to drive the cylindrical core (20) to move to the first position; the plug-removing liquid entering the cylindrical shell (10) is used to drive the cylindrical core (20) to move to the second position against the elastic force of the elastic member (30); When the cylindrical core (20) moves to the second position, the connecting hole (21) is in communication with the nozzle (40), so that the plug-removing liquid entering the cylindrical core (20) is sequentially sprayed to the outside of the cylindrical shell (10) through the connecting hole (21) and the nozzle (40); when the cylindrical core (20) moves to the first position, the connecting hole (21) is blocked by the inner wall of the cylindrical shell (10), so that the connecting hole (21) is isolated from the nozzle (40).

2. The device of claim 1, wherein, The nozzle (40) is a plurality of nozzles (40) which are distributed at intervals in the circumferential direction of the cylindrical shell (10); the connecting hole (21) is a plurality of connecting holes (21) which are distributed at intervals in the circumferential direction of the cylindrical core (20).

3. The device of claim 1, wherein, The cylindrical shell (10) comprises a cylindrical tubing connection part (11) and a cylindrical shell body (12), the shell body (12) is rotationally connected with the tubing connection part (11), the cylindrical core (20) is slidably arranged in the shell body (12) to switch between the first position and the second position; the nozzle (40) is arranged on the shell body (12); The elastic member (30) is arranged between the shell body (12) and the cylindrical core (20); the shell body (12) can drive the cylindrical core (20), the elastic member (30) and the nozzle (40) to rotate relative to the tubing connection part (11) around the axial direction.

4. The device of claim 3, wherein, The tubing connection part (11) and the shell body (12) are connected through spherical surface articulation.

5. The device of claim 4, wherein, The oil pipe connecting part (11) comprises a first cylindrical hinged part (111), a first end part of the first cylindrical hinged part (111) comprises a spherical convex, the shell main body (12) comprises a first connecting sleeve (121) and a cylindrical valve shell part (122), the cylindrical core part (20) is slidably arranged in the valve shell part (122), the elastic member (30) is arranged between the cylindrical core part (20) and the valve shell part (122), and the nozzle (40) is arranged on the valve shell part (122); the first connecting sleeve (121) is connected with the cylindrical valve shell part (122), and the inner walls of the connecting parts of the two form a spherical concave, and the spherical convex and the spherical concave are hinged.

6. The device of claim 5, wherein, The valve shell part (122) comprises a shell main body (1221), a connecting sleeve (1222), a spring sleeve (1223) and a lower joint (1224) which are fixed and coaxially connected in sequence along the axial direction; the cylindrical core part (20), the spring sleeve (1223), the lower joint (1224) and the connecting sleeve (1222) form an accommodating space (1225), the elastic member (30) is located in the accommodating space (1225), the elastic member (30) extends along the axial direction, and the two ends of the elastic member (30) are in positioning contact with the lower joint (1224) and the cylindrical core part (20) respectively; the nozzle (40) is arranged on the shell main body (1221).

7. The device of claim 6, wherein, The first end part of the connecting sleeve (1222) extends into the shell main body (1221), the cylindrical core part (20) comprises a limiting convex (22), when the cylindrical core part (20) is in the second position, the cylindrical core part (20) is limitedly matched by the limiting convex (22) in limiting contact with the end face of the first end part of the connecting sleeve (1222).

8. The device of claim 7, wherein, The shell main body (1221) has a limiting step face (1221a), when the cylindrical core part (20) is in the first position, the cylindrical core part (20) is limitedly matched by the limiting convex (22) in limiting contact with the limiting step face (1221a).

9. The device of claim 6, wherein, The valve shell part (122) further comprises a protective sleeve (1226), the protective sleeve (1226) is sleeved outside the shell main body (1221) and is fixedly connected with the shell main body (1221), the nozzle (40) is positioned between the protective sleeve (1226) and the shell main body (1221), and the protective sleeve (1226) is provided with a blockage-removing liquid avoiding hole opposite to the nozzle (40).

10. The device of claim 9, wherein, The protective sleeve (1226) is fixed to the shell main body (1221) through a connecting piece (1227), the shell main body (1221) is provided with an annular groove (1221b) extending in the axial direction, one end of the annular groove (1221b) away from the connecting sleeve (1222) is a closed end, one end of the annular groove (1221b) towards the connecting sleeve (1222) is an open end, and the two ends of the protective sleeve (1226) are in positioning contact with the connecting sleeve (1222) and the groove wall of the closed end of the annular groove (1221b) respectively.

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