CN214616418U

CN214616418U - Rotary jet device

Info

Publication number: CN214616418U
Application number: CN202120519356.1U
Authority: CN
Inventors: 王钊; 张宏杰; 高申领; 乔荣娜; 卢玉灵; 周越骑; 李新丹; 陈渊
Original assignee: China Petroleum and Chemical Corp; Petroleum Engineering Technology Research Institute of Sinopec Henan Oilfield Branch Co
Current assignee: China Petroleum and Chemical Corp; Petroleum Engineering Technology Research Institute of Sinopec Henan Oilfield Branch Co
Priority date: 2021-03-11
Filing date: 2021-03-11
Publication date: 2021-11-05
Anticipated expiration: 2031-03-11

Abstract

The utility model relates to a rotary jet device, which comprises a middle cylinder, an upper joint and a lower joint, wherein one of the upper joint and the lower joint is detachably connected with the middle cylinder, and the other of the upper joint and the lower joint is fixedly connected with the middle cylinder or integrally formed; the rotary jet device also comprises a rotary sleeve body, the rotary sleeve body is movably sleeved outside the middle cylinder body and can rotate around the axis of the middle cylinder body, a jet hole is arranged on the inner wall of the rotary sleeve body, a certain included angle is formed between the injection direction of the jet hole and the radial direction of the rotary sleeve body so as to reversely push the rotary sleeve body to rotate when liquid is injected, and a communication channel for communicating the inner cavity of the middle cylinder body with the jet hole is arranged on the middle cylinder body; the upper joint is provided with an upper limiting surface for limiting the upper part of the middle cylinder, the lower joint is provided with a lower limiting surface for limiting the lower part of the middle cylinder, and the upper and lower limiting surfaces are used for matching with the upper and lower positions of the limited rotary sleeve body so as to enable the communication channel to be communicated with the jet hole.

Description

Rotary jet device

Technical Field

The utility model relates to a rotary ejector.

Background

In the production process of the oil-water well, due to scaling, wax precipitation and mechanical impurity precipitation in rock stratum pores, or due to the fact that drilling fluid, workover fluid and solid particles in the drilling fluid and the workover fluid invade the stratum during drilling and workover, the stratum in a near wellbore zone is blocked to different degrees, so that the stratum permeability is reduced, the oil well yield is reduced, the water absorption of the water well is poor, and even the oil-water well stops production. The jet flow blockage removing device is a main tool for realizing blockage removing and yield increasing of an oil-water well, and the common jet flow blockage removing device also has the function of backwashing.

The existing jet flow blockage removing device comprises a spray head, wherein a check valve is arranged on the spray head, and the check valve can realize one-way flow of liquid from top to bottom as shown in the Chinese utility model patent with the granted publication number of CN 207332832U. The jet hole is arranged above the check valve on the jet head and can spray liquid to impact the blockage of the stratum, thereby achieving the aim of blockage removal. When the device is used, a well is firstly washed back, and liquid positive flushing jet flow is carried out.

In the prior art, the spray head is fixedly arranged on the connecting pipe, and the coverage area of the sprayed liquid is increased by increasing the number of jet holes and arranging the jet holes along the circumferential direction of the spray head. It also has certain disadvantages: in order to expand the coverage range as much as possible, the number of the jet holes needs to be increased, so that the processing cost is higher, the jet pressure of a single jet hole is lower, and the jet blockage removal effect is poorer; and the blind area of injection still exists when using, can't satisfy the operation requirement of circumference full coverage, also can reduce the effect that the injection deblocks.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a rotatory ejector to shower nozzle fixed arrangement leads to spraying the relatively poor technical problem of unblocking effect among the solution prior art.

In order to achieve the above object, the utility model provides a vacuum arc-extinguishing chamber's technical scheme is: a rotary jet device comprising: a middle cylinder, the axis of which extends along the up-down direction;

the upper joint and the lower joint are respectively arranged at the upper end and the lower end of the middle cylinder body, one of the upper joint and the lower joint is detachably connected with the middle cylinder body, and the other of the upper joint and the lower joint is fixedly connected with the middle cylinder body or integrally formed with the middle cylinder body;

the rotary sleeve body is movably sleeved outside the middle cylinder body and can rotate around the axis of the middle cylinder body, a jet hole is arranged on the inner wall of the rotary sleeve body, a certain included angle is formed between the jet direction of the jet hole and the radial direction of the rotary sleeve body so as to reversely push the rotary sleeve body to rotate when liquid is injected, and a communication channel for communicating the inner cavity of the middle cylinder body with the jet hole is arranged on the middle cylinder body;

the upper joint is provided with an upper limiting surface for limiting the upper part of the middle cylinder, the lower joint is provided with a lower limiting surface for limiting the lower part of the middle cylinder, and the upper and lower limiting surfaces are used for matching with the upper and lower positions of the limited rotary sleeve body so as to enable the communication channel to be communicated with the jet hole.

Has the advantages that: the upper and lower limiting surfaces limit the upper and lower positions of the rotating sleeve body, so that the rotating sleeve body is prevented from moving, and the communicating channel and the jet hole are ensured to be communicated. The jet direction of jet orifice is certain contained angle with the radial of the rotating sleeve body, and liquid can produce direction thrust and form turning moment to the rotating sleeve body after the jet orifice blowout, promotes the rotating sleeve body and rotates, and the rotatory in-process can realize the full cover of circumference, compares the shower nozzle of immobilization, and the effect that the injection was separated stifled is better.

As a further optimized scheme, the middle cylinder body is provided with a ball seat in an up-down sliding manner, the interior of the ball seat is communicated up and down, and the top of the ball seat is used for pressing the pressing ball to seal the opening at the top of the ball seat;

the up-and-down movement stroke of the ball seat is provided with an upper limit position and a lower limit position, when the ball seat is positioned at the upper limit position, the ball seat seals the communication channel, and when the ball seat is positioned at the lower limit position, the ball seat gives way to the communication channel;

the rotary ejector further comprises a limiting structure for keeping the ball seat at an upper limit position and a lower limit position.

Has the advantages that: when the ball seat is limited at the upper pole, the ball seat seals the communication channel, and flushing fluid cannot form a flow channel in the jet hole during backwashing, so that sundries in the flushing fluid are prevented from blocking the jet hole; the ball seat lets out the intercommunication passageway when extremely spacing down to through the cooperation with the ball of suppressing, form the single current valve in the below of jet orifice, guide liquid through the jet orifice blowout, improved liquid jet's pressure, improve and spray the effect of deblocking.

As a further optimized scheme, the limiting structure comprises a shearing pin arranged on the middle cylinder body, the shearing pin is used for being matched with the bottom stop of the ball seat to keep the ball seat at the upper limit position, and the shearing pin is used for being sheared and damaged when the ball is pressed to push the ball seat;

the limiting structure further comprises a stopping step arranged on the middle cylinder body or the lower joint, and the stopping step is used for being matched with the bottom of the ball seat in a stopping mode so as to keep the ball seat at the lower limiting position.

Has the advantages that: the limiting structure is formed by the shearing pin and the stopping step, and the whole structure is simpler.

As a further optimized scheme, the lower joint is screwed outside the middle cylinder;

the inner wall of the lower joint is flush with the inner wall of the middle barrel, and the stopping step is arranged on the lower joint.

Has the advantages that: the inner wall of lower clutch and the inner wall parallel and level of middle barrel, the ball seat can remove in the lower clutch, need not the length of barrel in the middle of the extra extension.

As a further optimized scheme, an annular cavity is arranged on the inner circumferential surface of the rotary sleeve body and/or the outer circumferential surface of the middle cylinder body, and the annular cavity is connected with the communication channel and the jet hole.

Has the advantages that: through setting up the annular chamber, guaranteed the normal intercommunication of intercommunication passageway with the jet hole, even the jet hole, the quantity of intercommunication passageway diminishes and also can realize the intercommunication.

As a further optimized scheme, at least two jet holes are arranged, and all the jet holes are arranged on the rotary sleeve body in a layered mode along the vertical direction.

Has the advantages that: the jet holes are arranged in a layered mode, the jet area of the rotary jet device at the same position can be improved, and the integral moving times of the rotary jet device are reduced.

As a further optimized scheme, the jet holes of any two adjacent layers are arranged in a staggered mode in the circumferential direction.

Has the advantages that: the adjacent two layers of jet holes are arranged in a staggered mode in the circumferential direction, so that the jet holes between the adjacent layers can be prevented from interfering with each other during injection.

As a further preferred solution, the thread in the jet hole is equipped with a nozzle.

Has the advantages that: the nozzle is assembled in a threaded manner, so that subsequent disassembly, assembly and replacement are convenient.

As a further optimized solution, the lower end of the lower joint is a tapered end, so that the lower joint forms a lower guiding head.

Has the advantages that: the lower guide head can guide the rotary ejector to move in the well depth direction.

As a further optimized scheme, the lower connector is provided with a bottom opening and a lateral channel, and the bottom opening and the lateral channel are communicated with an inner cavity of the lower connector.

Has the advantages that: the lower joint is provided with the bottom opening and the lateral passages, the quantity of backflow paths of well washing liquid in the well backwashing process is increased, and when a sand layer exists in the well, even if the bottom opening is blocked, the lateral passages can still pass the liquid, so that the smoothness of the backwashing paths is ensured.

Drawings

Fig. 1 is a schematic structural diagram of a rotary ejector 1 according to an embodiment of the present invention;

fig. 2 is a schematic cross-sectional view of a rotating sleeve body in an embodiment 1 of the rotating ejector according to the present invention;

description of reference numerals:

1. an upper joint; 2. an upper limiting surface; 3. a middle cylinder; 4. a nozzle; 5. an annular cavity; 6. rotating the sleeve body; 7. a lower limiting surface; 8. a lower guide head; 9. a lateral channel; 10. shearing the pin; 11. a communication channel; 12. a ball seat; 13. pressing the ball; 14. a jet hole; 15. and stopping the step.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.

It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, elements recited by the phrase "comprising an … …" do not exclude the inclusion of such elements in processes or methods.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from the specific situation.

In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be a detachable connection or a non-detachable connection. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from the specific situation.

The present invention will be described in further detail with reference to examples.

The utility model provides a specific embodiment 1 of rotatory ejector:

as shown in figures 1 and 2, the rotary ejector is used for ejecting liquid to impact the blockage of the stratum, and when the rotary ejector is used, the rotary ejector performs rotary ejection, so that full coverage is realized in the circumferential direction, and the ejection blockage removal effect is good.

The rotary ejector comprises a middle cylinder 3, an upper connector 1 positioned above the middle cylinder 3 and a lower guide head 8 positioned below the middle cylinder 3, wherein the upper connector 1 and the middle cylinder 3 are integrally formed, and the upper connector 1 is provided with internal threads and is used for connecting a pipe column. The lower guide head 8 is installed outside the lower end of the middle cylinder 3 in a threaded manner. The upper joint 1, the middle cylinder 3 and the lower guide head 8 form a channel which is communicated up and down and used for passing liquid. Also, as shown in fig. 1, the inner wall of the intermediate cylinder 3 is flush with the upper end portion of the inner wall of the lower guide head 8.

The outer diameters of the upper joint 1 and the lower guide head 8 are larger than the outer diameter of the middle cylinder 3, a rotary sleeve body 6 is sleeved outside the middle cylinder 3, and the rotary sleeve body 6 can rotate around the axis of the middle cylinder 3. The structure of the rotating sleeve body 6 is as shown in fig. 2, the inner wall of the rotating sleeve body 6 is provided with jet holes 14, and in combination with fig. 1, two jet holes 14 are provided at the same height, and the two jet holes 14 at the same height are circumferentially and uniformly distributed. Here, the jet hole 14 includes two vertically distributed sections, which are communicated with the inside of the rotating sleeve body 6, and the direction of the jet hole 14 ejecting the liquid forms a certain angle with the radial direction of the rotating sleeve body 6. When the liquid is sprayed out of the jet hole 14, the liquid generates a reverse acting force on the rotating sleeve body 6, and the acting force can reversely push the rotating sleeve body 6 to rotate. Three layers of jet holes 14 are arranged here, and any two adjacent layers of jet holes 14 are arranged in a staggered mode along the circumferential direction. A nozzle 4 is screwed into the jet hole 14, and liquid is ejected from the nozzle 4.

As shown in fig. 1, a communication channel 11 is provided on the middle cylinder 3 at a position corresponding to the position of the rotating sleeve 6, the communication channel 11 is used for communicating the inner cavity of the middle cylinder 3 with each jet hole 14, in order to ensure that the communication channel 11 and the jet hole 14 can be communicated, an annular cavity 5 is provided on the inner circumferential surface of the rotating sleeve 6 and the outer circumferential surface of the middle cylinder 3, and the annular cavity 5 ensures that each jet hole 14 can be connected with the communication channel 11.

In order to prevent the rotating sleeve body 6 from moving up and down when in use, so that the jet hole 14 cannot be communicated with the inner cavity of the middle cylinder body 3, and the size of the rotating sleeve body 6 is matched with the interval size between the upper connector 1 and the lower guide head 8, specifically, the upper limiting surface 2 is arranged at the bottom of the upper connector 1, the lower limiting surface 7 is arranged at the top of the lower guide head 8, and the distance between the upper limiting surface 2 and the lower limiting surface 7 is preferably consistent with the axial length of the rotating sleeve body 6, so that the rotating sleeve body 6 can only rotate in the circumferential direction and cannot move up and down, of course, when in actual processing, even if the distance between the upper limiting surface 2 and the lower limiting surface 7 is greater than the axial length of the rotating sleeve body 6, as long as the jet hole 14 can be communicated with the inner cavity of the middle cylinder body 3, the use requirements can be met.

For carrying out the backwash well, liquid can not block up the jet hole 14 with debris when guaranteeing the backwash well simultaneously, and has sufficient pressure when the injection strikes the plug, and the inside slip of barrel 3 is equipped with ball seat 12 in the middle of the present embodiment, and ball seat 12 is inside to link up from top to bottom. The ball seat 12 is matched with the middle cylinder 3 in a sliding and sealing mode, and the ball seat 12 has enough length, so that the communication channel 11 can be closed, and the communication channel 11 can also be opened. In practice, a sealing ring may be provided outside the ball seat 12 to ensure that the ball seat 12 can seal the communication channel. Of course, if the accuracy of the ball seat 12 is high, the seal ring may not be provided. Furthermore, as shown in fig. 1, there is a limit step on the upper joint 1 to prevent the ball seat 12 from moving upward when in use. When the ball seat 12 closes the communication channel 11, the flushing fluid and impurities carried by the flushing fluid cannot enter the inner cavity of the middle cylinder 3 through the jet hole 14 during the backwashing. As shown in fig. 1, in order to maintain the ball seat 12 at this position, a shear pin 10 is inserted into the intermediate cylinder 3, the ball seat 12 is stopped by the shear pin 10, and the shear pin 10 is inserted into the intermediate cylinder 3 from the outside of the intermediate cylinder 3.

When the liquid is sprayed to impact the blockage, a pressing ball 13 is thrown into the rotary ejector, the pressing ball 13 moves to the ball seat 12, and after the pressing is continued, the pressing ball 13 pushes the ball seat 12 to move downwards and cut the shear pin 10, so that the communication channel 11 is opened. In order to prevent the liquid from flowing downward through the lower guide head 8, there is a stopping step 15 on the lower guide head 8, the stopping step 15 is used to stop the ball seat 12, and when the liquid is sprayed, the ball seat 12 and the pressing ball 13 actually form a check valve to prevent the liquid from flowing downward.

As shown in fig. 1, the lower end of the lower guide head 8 is a conical end which can play a guiding role in the process of lowering into the well, the lower guide head 8 is provided with a bottom opening and a lateral channel 9, the lateral channel 9 plays a role in increasing the number of upward return paths of liquid in the backwashing of the well, and after the rotary jet device is inserted into a sand layer, the liquid can be returned through the lateral channel 9, so that the backwashing of the well is ensured to be carried out smoothly.

In this embodiment, the lower guide head 8 constitutes a lower joint connected below the intermediate cylinder 3. When the shear pin 10 is not sheared, the shear pin 10 is in stop fit with the bottom of the ball seat 12, and the position of the ball seat 12 at this time is an upper limit position; when the ball seat 12 is engaged with the stop step 15, the ball seat 12 is located at a lower limit position.

And the shear pin 10 and the stop step 15 form a limit structure capable of limiting the ball seat 12.

It should be noted that the up and down directions in this embodiment are only concepts customized for convenience of description, and when the rotary jet device is applied to a horizontal well, the up and down directions at this time are actually horizontal directions.

The utility model discloses rotary jet device's embodiment 2:

in example 1, the lower joint has a bottom opening and a lateral channel. In this embodiment, only one of the bottom opening and the lateral channel remains on the lower joint.

The utility model discloses rotary jet device's embodiment 3:

in example 1, the lower end of the lower joint was a tapered end. In this embodiment, the lower joint has a structure in which the outer periphery has the same diameter.

The utility model discloses rotary jet device's embodiment 4:

in embodiment 1, the nozzle is screwed into the jet hole, which facilitates replacement. In this embodiment, the nozzle may be welded or glued into the jet hole.

The utility model discloses rotary jet device's embodiment 5:

in embodiment 1, six jet holes are arranged in three layers, and the jet holes between any two layers are arranged in a staggered manner in the circumferential direction. In this embodiment, the number and arrangement of the jet holes may be changed, for example, the jet holes are still arranged in three layers, but the jet holes of any two layers are arranged in the vertical direction. Of course, the jet holes can have only one layer, and the number of the jet holes can also have only one layer.

In addition, it should be noted that the shape of the jet holes and the size of the included angle between the jet direction and the radial direction can also be changed.

The utility model discloses rotary jet device's embodiment 6:

in example 1, annular cavities were formed in both the inner peripheral surface of the rotary sleeve body and the outer peripheral surface of the intermediate cylindrical body. In this embodiment, the annular cavity may be provided only on the inner peripheral surface of the rotary sleeve body or the outer peripheral surface of the intermediate cylinder body.

In other embodiments, the annular cavity may be eliminated when the number of communication channels and jet holes is large.

The utility model discloses rotary jet device's embodiment 7:

in embodiment 1, the lower joint is screwed outside the middle cylinder, and the inner wall of the lower joint is flush with the inner wall of the middle cylinder, and the lower joint is provided with a stopping step. In this embodiment, the middle cylinder is extended, and the stopping step can be disposed on the middle cylinder.

When the stopping step is arranged on the middle cylinder, the inner wall of the lower joint and the inner wall of the middle cylinder can not be arranged in parallel and level any more.

The utility model discloses rotary jet device's embodiment 8:

in embodiment 1, the limiting structure comprises a shear pin and a stop step. In this embodiment, limit structure is including arranging the pressure spring in middle barrel, and the lower extreme roof pressure of pressure spring is on middle barrel or lower clutch, and the ball seat roof pressure is in the upper end of pressure spring. When the well is backwashed, the ball seat is pressed upwards by the pressure spring, so that the communication channel is closed; when liquid is sprayed, the pressing ball is thrown firstly and then pressed, and the pressing ball pushes the ball seat to compress the pressure spring to open the communicating channel.

In this embodiment, the upper limit and the lower limit are both range values.

The utility model discloses rotary jet device's concrete embodiment 9:

in example 1, the movable ball seat is arranged to prevent the jet hole from being blocked when the well is backwashed. In this embodiment, the ball seat is fixed and can't reciprocate in the barrel in the middle of, and the ball seat is located the below in jet hole.

Or the ball seat can be eliminated, and the check valve is directly fixed on the middle cylinder and positioned below the jet hole.

The utility model discloses rotary jet device's concrete embodiment 10:

in example 1, a movable ball seat was provided in the intermediate cylinder. In this embodiment, the ball seat is eliminated and the check valve is no longer provided.

The utility model discloses rotary jet device's concrete embodiment 11:

in embodiment 1, the middle cylinder and the upper joint are integrally formed and detachably connected with the lower joint. In this embodiment, the middle cylinder and the upper joint can be welded together or detachably connected through threads. Or in other embodiments, the middle cylinder body and the lower joint are integrally formed and detachably connected with the lower joint.

Finally, it should be noted that the above mentioned embodiments are only preferred embodiments of the present invention, and not intended to limit the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made without inventive effort to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A rotary jet device characterized by: the method comprises the following steps:

a middle cylinder (3) with an axis extending in the vertical direction;

the upper joint (1) and the lower joint are respectively arranged at the upper end and the lower end of the middle cylinder body (3), one of the upper joint (1) and the lower joint is detachably connected with the middle cylinder body (3), and the other of the upper joint (1) and the lower joint is fixedly connected with the middle cylinder body (3) or integrally formed;

the rotary sleeve body (6) is movably sleeved outside the middle cylinder body (3) and can rotate around the axis of the middle cylinder body (3), a jet hole (14) is formed in the inner wall of the rotary sleeve body (6), a certain included angle is formed between the jet direction of the jet hole (14) and the radial direction of the rotary sleeve body (6) so as to reversely push the rotary sleeve body (6) to rotate when liquid is jetted, and a communicating channel (11) for communicating the inner cavity of the middle cylinder body (3) with the jet hole (14) is formed in the middle cylinder body (3);

the upper joint (1) is provided with an upper limiting surface (2) used for limiting the middle cylinder body (3) in an upper mode, the lower joint is provided with a lower limiting surface (7) used for limiting the middle cylinder body (3) in a lower mode, and the upper limiting surface and the lower limiting surface are used for being matched with an upper position and a lower position of a rotating sleeve body (6) to enable a communication channel (11) to be communicated with the jet hole (14).

2. The rotary ejector of claim 1 wherein: the middle barrel (3) is provided with a ball seat (12) in a up-down sliding manner, the interior of the ball seat (12) is communicated up and down, and the top of the ball seat (12) is pressed by a pressing ball (13) to seal the opening at the top of the ball seat (12);

the up-and-down movement stroke of the ball seat (12) is provided with an upper limit position and a lower limit position, when the ball seat (12) is at the upper limit position, the ball seat (12) seals the communication channel (11), and when the ball seat (12) is at the lower limit position, the ball seat (12) gives way to the communication channel (11);

the rotary ejector further comprises a retaining structure for retaining the ball seat (12) in an upper limit position and a lower limit position.

3. The rotary ejector of claim 2 wherein: the limiting structure comprises a shearing pin (10) arranged on the middle cylinder body (3), the shearing pin (10) is used for being matched with the bottom of the ball seat (12) in a blocking mode so as to keep the ball seat (12) at the upper limiting position, and the shearing pin (10) is used for being sheared and damaged when a pressing ball (13) presses the ball seat (12);

the limiting structure further comprises a stopping step (15) arranged on the middle cylinder body (3) or the lower joint, and the stopping step (15) is used for being matched with the bottom of the ball seat (12) in a stopping mode so as to keep the ball seat (12) at the lower limiting position.

4. The rotary ejector of claim 3 wherein: the lower joint is screwed outside the middle cylinder (3);

the inner wall of the lower joint is flush with the inner wall of the middle cylinder (3), and the stopping step (15) is arranged on the lower joint.

5. The rotary ejector according to any one of claims 1 to 4, wherein: an annular cavity (5) is arranged on the inner circumferential surface of the rotating sleeve body (6) and/or the outer circumferential surface of the middle cylinder body (3), and the annular cavity (5) is connected with the communicating channel (11) and the jet hole (14).

6. The rotary ejector of claim 5 wherein: the jet holes (14) are at least two, and each jet hole (14) is arranged on the rotating sleeve body (6) in a layered mode along the vertical direction.

7. The rotary ejector of claim 6 wherein: the jet holes (14) of any two adjacent layers are arranged in a staggered way in the circumferential direction.

8. The rotary ejector according to any one of claims 1 to 4, wherein: the jet hole (14) is internally threaded with a nozzle (4).

9. The rotary ejector according to any one of claims 1 to 4, wherein: the lower end of the lower joint is a conical end, so that the lower joint forms a lower guide head (8).

10. The rotary ejector according to any one of claims 1 to 4, wherein: the lower joint is provided with a bottom opening and a lateral channel (9), and the bottom opening and the lateral channel (9) are communicated with an inner cavity of the lower joint.