Multiple switch rail reamer

Abstract

The invention discloses a multiple-open and close track reamer, comprising a core shaft, the core shaft being sleeved in a shell, the core shaft comprising a fixed section and a movable section, the fixed section being fixedly arranged in the shell, the fixed section being provided with a water outlet; the movable section is partially sleeved with the fixed section, the movable section is movably arranged in the shell, and has an open position and a closed position, the movable section located at the open position opens the water outlet, and the movable section located at the closed position closes the water outlet; the core shaft is decomposed into the fixed section and the movable section, and the opening and closing of the water outlet can be directly controlled while the movable section moves, thereby simplifying the structure of other components such as a transposition piston and the connection relationship or working logic between the components, thereby simplifying the design, production and use difficulty of the reamer.

Description

Technical Field

[0001] The invention relates to the field of drilling, in particular to a multiple-opening and closing track reamer. Background Art

[0002] As the difficulty of domestic oil and gas field development gradually increases, complex situations such as complex formations, shrinking wellbore diameter, and well leakage occur frequently; in order to ensure underground safety, the wellbore usually needs to be expanded using an expander.

[0003] In order to realize multiple opening and closing of the reamer in the wellbore, the prior art controls the opening and closing of the reamer by throwing a ball. However, the structure of the existing ball-throwing reamer is relatively complex, which increases the difficulty of manufacturing and using the reamer and increases the cost. Summary of the invention

[0004] In order to overcome at least one of the defects of the prior art described above, the present invention provides a multiple-opening and closing rail-type reamer, which has a simple and reliable structure, ensuring the function of multiple opening and closing, and simplifying the overall structure.

[0005] The technical solution adopted by the present invention to solve the problem is:

[0006] Multiple switch rail reamer, including:

[0007] case;

[0008] A core shaft is sleeved in the shell, the core shaft includes a fixed section and a movable section, the fixed section is fixedly arranged in the shell, and the fixed section is provided with a water outlet; the movable section is partially sleeved with the fixed section, the movable section is movably arranged in the shell, and has an open position and a closed position, the movable section located in the open position opens the water outlet, and the movable section located in the closed position closes the water outlet;

[0009] Water is introduced from one end of the fixed section away from the movable section, and in the opposite direction of the fixed section where the water is introduced, a cutter head is movably provided on the shell behind the water outlet, and the cutter head is extended or retracted from the shell, and a pusher is provided at one end of the cutter head close to the water outlet, and the pusher acts on the cutter head to make the cutter head extend out of the shell;

[0010] A reset component is disposed in the housing, wherein the reset component acts on the cutter head to shrink the cutter head in the housing;

[0011] A nozzle is arranged on the side wall of the shell, and the water in the fixed section passes through the water outlet and the nozzle in sequence to be discharged outside the shell.

[0012] Further, it also includes a driving structure;

[0013] The driving structure includes a transposition piston, a ball passer and a return member;

[0014] The transposition piston is arranged in the housing and is rotationally connected to the moving section, and the transposition piston is provided with an opening and closing track;

[0015] A limiter is arranged on the housing, and one end of which is arranged in the opening and closing track, and the limiter abuts against the opening and closing track to realize that the moving section stops at the opening position and the closing position respectively;

[0016] One end of the ball passer is connected to one end of the moving section away from the fixed section and is located in the housing, and the other end of the ball passer is provided with an expansion and contraction structure;

[0017] The housing is provided with an opening position, the ball passing device moves following the moving section, and the expansion and contraction structure expands when reaching the opening position;

[0018] The return member is sleeved on the moving section and acts on the transposition piston to push the moving section and drive the expansion and contraction structure located at the open position to return to its original position and contract.

[0019] Furthermore, the return member is a return spring.

[0020] Furthermore, the shell is provided with an opening;

[0021] The side wall of the opening is provided with a first sliding structure, and the side wall of the cutter head is provided with a second sliding structure;

[0022] The first sliding structure and the second sliding structure are slidably connected.

[0023] Furthermore, the first sliding structure is arranged to be inclined from inside to outside.

[0024] Further, the reset assembly includes a reset spring;

[0025] The return spring is sleeved on the fixing section.

[0026] Furthermore, the reset assembly also includes a sealing sleeve;

[0027] The sealing sleeve is arranged in the housing, and the fixing section is inserted into the sealing sleeve;

[0028] And / or, the return spring is embedded in the sealing sleeve.

[0029] Furthermore, the housing is provided with a collecting chamber;

[0030] The collecting chamber is located at an end of the open position away from the fixing section.

[0031] Furthermore, one end of the collecting chamber away from the open position is a contraction end, and the contraction end is used for contraction and interception.

[0032] Furthermore, it also includes a collection basket, wherein a liquid leakage port is provided on the peripheral side of the collection basket;

[0033] A liquid-passing gap is provided between the outer wall of the collecting basket and the inner wall of the shell, and an interception position is provided in the middle of the collecting basket. Water passes through the liquid leakage port and the liquid-passing gap to bypass the interception position.

[0034] Furthermore, the number of the cutter heads is multiple;

[0035] And / or the plurality of cutting heads are evenly spaced and arranged on the housing.

[0036] Furthermore, it also includes an abutment member;

[0037] The abutment member is disposed at one end of the reset assembly close to the cutter head, and the reset assembly acts on the cutter head through the abutment member;

[0038] And / or, the abutment member is provided at one end of the pushing member close to the cutter head, and the pushing member pushes the cutter head via the abutment member.

[0039] Furthermore, the nozzle is arranged toward the cutter head.

[0040] Further, the housing comprises an upper section, a middle section and a lower section connected in sequence;

[0041] The fixed section is arranged in the upper section, the movable section passes through the upper section and the middle section, and the collecting chamber is arranged in the lower section.

[0042] In summary, the multiple switching rail reamer provided by the present invention has the following technical effects:

[0043] 1) The core shaft is decomposed into a fixed section and a movable section. When the movable section moves, the opening and closing of the water outlet can be directly controlled, thereby simplifying the structure of other components such as the transposition piston and the connection relationship or working logic between the components, thereby simplifying the design, production and use of the reamer. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 is a cross-sectional view of the present invention;

[0045] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0046] Figure 3 for Figure 2 The enlarged view of point B in the middle;

[0047] Figure 4 is a schematic diagram of a housing of the present invention;

[0048] Figure 5 for Figure 4 The enlarged view of point A in the middle;

[0049] Figure 6 is a schematic diagram of an abutment member of the present invention;

[0050] Figure 7 is a schematic diagram of a transposition piston of the present invention;

[0051] Figure 8 It is a schematic diagram of the ball passing device of the present invention;

[0052] Fig. 9 is a cross-sectional view of the lower section and the collection basket of the present invention;

[0053] Fig.10 is a schematic diagram of a collection basket of the present invention;

[0054] Fig.11 It is an expanded view of the opening and closing track of the present invention.

[0055] The meanings of the reference numerals are as follows:

[0056] 1. Shell; 11. Upper section; 12. Middle section; 13. Lower section; 2. Mandrel; 21. Fixed section; 211. Water outlet; 22. Moving section; 3. Cutting head; 31. Second sliding structure; 4. Pushing member; 5. Reset assembly; 51. Reset spring; 52. Sealing sleeve; 6. Nozzle; 7. Driving structure; 71. Transposition piston; 711. Opening and closing track; 72. Ball passer; 721. Retracting structure; 73. Return member ; 8. Limiting member; 9. Open position; 10. Opening; 101. First sliding structure; 14. Collecting chamber; 15. Collecting basket; 151. Leakage port; 152. Main body; 153. Pad; 154. Intercepting block; 16. Abutment member; 161. Ring seat; 162. Abutment block; 163. Snap-in groove; 17. First human-shaped track; 18. Second human-shaped track; 19. Water injection space; 20. Intercepting position; 23. Ball. DETAILED DESCRIPTION

[0057] For better understanding and implementation, 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.

[0058] In the description of the present invention, it should be noted that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0059] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0060] Embodiment 1

[0061] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The present invention discloses a multiple-opening and closing rail-type reamer, comprising:

[0062] The shell 1 is preferably a long strip structure, including an upper section 11 and a middle section 12, the middle section 12 is connected to the upper section 11, and the middle parts of the upper section 11 and the middle section 12 are connected, preferably, the upper section 11 and the middle section 13 are plug-connected, and more preferably, the two are sealed, and the sealing means include but are not limited to sealing rings.

[0063] The core shaft 2 is sleeved in the shell 1, and the core shaft 2 includes a fixed section 21 and a movable section 22. The fixed section 21 is fixedly arranged on the shell 1, and the fixed section 21 is provided with a water outlet 211; the movable section 22 is partially sleeved with the fixed section 21, and preferably, the movable section 22 is sleeved outside the fixed section 21; the movable section 22 is movably arranged in the shell 1, and has an open position and a closed position. The movable section 22 in the open position opens the water outlet 211, and the movable section 22 in the closed position closes the water outlet 211.

[0064] Specifically, the fixed section 21 is fixedly arranged in the upper section 11. The preferred solution includes: the reamer includes a reset component 5, the reset component 5 includes a sealing sleeve 52, the sealing sleeve 52 is arranged at one end of the upper section 11 away from the middle section 12, the fixed section 21 is arranged in the upper section 11, and one end thereof is embedded in the sealing sleeve 52. For the convenience of description, the other end of the fixed section 21 is now defined as a free end, and the free end of the fixed section 21 is provided with a water outlet 211. Preferably, the number of the water outlet hole 211 is at least one, and one water outlet hole 211 is arranged on the fixed section 21, and a plurality of water outlet holes 211 (preferably eight) are evenly spaced and arranged in a ring on the fixed section 21.

[0065] The cutter head 3 is movably arranged on the shell 1, and the cutter head 3 extends out or retracts in the shell 1. More specifically, the cutter head 3 and the reset assembly 5 are both arranged in the upper section 11, and the reset assembly 5 acts on the cutter head 3. Specifically, the reset assembly 5 also includes a reset spring 51, which can be replaced by a reset spring. The reset spring 51 acts on the cutter head 3 to retract the cutter head 3 in the shell 1.

[0066] Specifically, an opening 10 is provided on the upper section 11, and the opening 10 is located between the water outlet 211 and the sealing sleeve 52. The cutter head 3 is provided in the opening 10, and the side wall of the opening 10 is provided with a first sliding structure 101, and the side wall of the cutter head 3 is provided with a second sliding structure 31. The first sliding structure 101 and the second sliding structure 31 are slidably connected. Preferably, the first sliding structure 101 is a sliding groove, and the second sliding structure 31 is a sliding protrusion adapted to the sliding groove, and the number of the second sliding structures 31 is at least one.

[0067] In this embodiment, the preferred manners for the cutter head 3 to be retracted to the upper section 11 are:

[0068] This embodiment takes five sliding protrusions as an example. The five sliding protrusions are evenly spaced on the long side wall of the cutter head 3. The special sliding groove is tilted from the inside to the outside, and the sliding groove extends toward the sealing sleeve 52. Preferably, the angle between the sliding groove and the axis of the fixed section 21 is between 30° and 45°. Therefore, it can be known that when the sliding protrusion moves along the sliding groove toward the sealing sleeve 52, the cutter head 3 extends out of the upper section 11 and shrinks in the upper section 11 in the opposite direction; therefore, the reset spring 51 is arranged at one end of the cutter head 3 close to the sealing sleeve 52. Specifically, the reset spring 51 is sleeved on the fixed section 21, and more preferably, the reset spring 51 is embedded in the sealing sleeve 52; it is also explained that in addition to being used for resetting the cutter head 3, the reset spring 51 can also prevent the cutter head 3 from sliding outward and falling off.

[0069] Other alternative solutions for retracting the upper section 11 of the cutter head 3 include: the sliding groove is set parallel to the radial direction of the fixed section 21, then one end of the reset spring 51 is connected to the opening 10, and the other end is connected to the cutter head 3, and when the cutter head 3 is forced to extend outward, the reset spring 51 is compressed, and when the cutter head 3 is not forced, it retracts in the upper section 11 under the elastic force of the reset spring 51.

[0070] In the above two retracting modes of the cutter head 3 , the outer end of the sliding groove can be set on a positioning protrusion, and the positioning protrusion is used to stop the cutter head 3 when it is extended to the maximum position, so as to further prevent the cutter head 3 from falling off from the opening 10 .

[0071] Correspondingly, the preferred ways for the cutter head 3 to extend out of the upper section 11 are:

[0072] The pusher 4 is disposed at one end of the cutter head 3 opposite to the sealing sleeve 52 , that is, at a side of the cutter head 3 close to the water outlet 211 , and the pusher 4 is located between the water outlet 211 and the cutter head 3 .

[0073] Preferably, the pushing member 4 is a piston, which is sleeved on the fixed section 21 and sealed with the fixed section 21. At the same time, the outer wall of the piston is sealed with the inner wall of the upper section 11. The piston reciprocates in the upper section 11 to push the cutter head 3 outward or cancel the push on the cutter head 3.

[0074] Other alternative solutions for the push member 4 are that the push member 4 is an annular block. Similarly, the annular block is sealingly sleeved on the fixed section 21, the outer wall of the annular block is provided with a sliding groove, the inner wall of the upper section 11 is provided with a convex strip, the convex strip is arranged along the axial direction of the fixed section 21, the sliding groove and the convex strip are slidably connected, and the outer wall of the annular block is sealed with the inner wall of the upper section 11.

[0075] Further, see Figure 6 In terms of the number of cutter heads 3, the number of cutter heads 3 is at least one. In this embodiment, three cutter heads 3 are taken as an example. The three cutter heads 3 are evenly spaced and arranged in a ring on the upper section 11. In order to better promote the simultaneous extension or contraction of the three cutter heads 3, an abutment 16 is arranged at at least one end of the cutter head 3. The abutment 16 is sleeved on the fixed section 21 and moves along the axial direction of the fixed section 21. In particular, the abutment 16 includes a ring seat 161 and an abutment block 162. The ring seat 161 is sleeved on the fixed section 21, and the abutment block 162 corresponds to the number of the cutter heads 3, which is also three.

[0076] Preferably, an abutment member 16 is provided at one end of the cutter head 3 close to the return spring 51 , and three abutment blocks 162 abut against one end of the cutter head. Additionally, an abutment member 16 may also be provided at one end of the cutter head 3 close to the push member 4 .

[0077] More preferably, a clamping groove 163 is provided on the abutment member 16 , and the clamping groove 163 is provided on the ring seat 161 and the abutment block 162 , and the end of the cutter head 3 is clamped in the clamping groove 163 .

[0078] According to the above, the movable section 22 needs to move to open and close the water outlet 211. In the embodiment of the present invention, the movable section 22 moves axially along the fixed section 21. Specifically, the movable section 22 is penetrated through the middle section 12, and one end thereof extends into the upper section 11, and this end portion is partially socketed with the fixed section 21.

[0079] See also Figure 7 and Figure 8In order to move the moving section 22, it also includes a driving structure 7, which includes a transposition piston 71, a ball passer 72 and a return member 73; the transposition piston 71 is arranged in the housing 1 and is rotatably connected to the moving section 22. Specifically, at least one end of the transposition piston 71 is provided with a bearing, and the bearing is sleeved on the moving section 22. The transposition piston 71 is rotatably connected to the moving section 22 through the bearing. In this embodiment, in order to ensure the stability of the installation of the transposition piston 71, bearings are provided at both ends thereof.

[0080] In particular, the transposition piston 71 is provided with an opening and closing track 711, and the opening and closing track 711 includes at least two track modules, one track module includes a first human-shaped track 17 and three second human-shaped tracks 18, the first human-shaped track 17 and the second human-shaped track 18 respectively include a straight track and an oblique track, specifically, one end of the oblique track is connected to the middle of the straight track to form a character recognition result, in particular, the straight track of the first human-shaped track 17 is longer than the straight track of the second human-shaped track 18, the straight track is arranged along the axial direction of the transposition piston 71, the three first human-shaped tracks 17 are sequentially connected to one side of the first human-shaped track 17, and the first human-shaped track 17 and the second human-shaped track 18, as well as the three second human-shaped tracks 18 are all interconnected by the straight track and the oblique track, it can be known that only one end of the straight track is involved in the connection of the oblique track, for the convenience of description, the other end of the straight track is named as the clamping free end,

[0081] Particularly, the free ends of the linear tracks of one of the three second human-shaped tracks 18 and the linear tracks of the first human-shaped track 17 extend to the same side, while the free ends of the linear tracks of the other two second human-shaped tracks 18 extend in opposite directions.

[0082] In addition, the two track modules, in addition to being connected by straight tracks and oblique tracks, also need to satisfy the requirement that the first human-shaped track 17 of one track module is connected to the second human-shaped track 18 at the end of the other track module.

[0083] For reference, after the transposition piston 71 is installed to the moving section 22 , the clamping free end of the first human-shaped track 17 faces a direction away from the upper section 11 .

[0084] The limiting member 8 is arranged on the shell 1. Specifically, one end of the limiting member 8 passes through the shell 1 and is arranged in the opening and closing track 711. The limiting member 8 abuts against the opening and closing track 711 to achieve the movement section 22 to stop at the open position and the closed position respectively.

[0085] Preferably, the limiting member 8 is a limiting screw, which passes through the middle section 12 and is inserted into the opening and closing track 711.

[0086] One end of the ball passer 72 is connected to the end of the moving section 22 away from the fixed section 21, and it is located in the shell 1, and the other end of the ball passer 72 is provided with a contraction structure 721; the shell 1 is provided with an opening position 9, the ball passer 72 moves with the moving section 22, and the contraction structure 721 opens when it reaches the opening position 9; the return member 73 is sleeved on the moving section 22, and acts on the shifting piston 71 to push the moving section 22 and drive the contraction structure 721 located at the opening position 9 to reset and contract.

[0087] Specifically, the ball passer 72 includes an annular base and multiple spring sheets, one end of which is connected to the edge of the annular base in sequence. The annular base is connected to one end of the movable section 22 away from the fixed section 21, and a trigger block is provided at the other end of the elastic sheet. The multiple spring sheets and the multiple trigger blocks at the ends of the spring sheets form an expansion and contraction structure 721.

[0088] In addition, an outwardly recessed annular groove is provided on the inner wall of the middle section 12 to form an opening position 9 .

[0089] Preferably, the return member 73 is a return spring. Alternatively, the return member 73 may also be a return spring.

[0090] The return member 73 is sleeved on the moving section 22 , and one end thereof abuts against the inner wall of the middle section 12 , and the other end abuts against the bearing of the end of the shifting piston 71 away from the fixed section 21 .

[0091] According to the above, after the movable section 22 is inserted into the middle section 12, when the movable section 22 is in the closed position, a water injection space 19 is formed between the inner wall of the upper section 11, the outer wall of the fixed section 21, the outer wall of the movable section 22 located in the upper section 11, one end of the pushing member 4 close to the middle section 12, and one end where the middle section 12 is connected to the upper section 11, and a nozzle 6 is provided on the outer wall of the upper section 11 and located in the water injection space 19, and preferably, the nozzle 6 is arranged toward the cutter head 3, and preferably, the angle between the nozzle 6 and the axis of the fixed section 21 is between 30° and 45°.

[0092] In the initial state, the movable section 22 is in the closed position, and one end of the movable section 22 blocks and closes the water outlet 211 . To prevent leakage from the gap between the fixed section 21 and the movable section 22 , at least one sealing ring is provided on the inner wall of the movable section 22 .

[0093] The return spring 51 is in a naturally extended state, and the cutter head 3 is retracted in the upper section 11 .

[0094] At this time, the limiter 8 is located at the free end of the linear track of the first human-shaped track 17 , and the return spring is in a naturally extended state; the trigger block of the ball passer 72 is squeezed inwardly by the moving section 22 .

[0095] The reamer is placed into the wellbore, specifically, the middle section 12 is placed at the bottom and the upper section 11 is placed at the top. The outer end of the fixed section 21 is connected to an external water pipe. When the reamer reaches the predetermined position, the ball 23 is placed into the fixed section 21. After the ball 23 reaches the trigger block position, the middle gap of the multiple trigger blocks in the contracted state is smaller than the diameter of the ball 23, and the ball 23 cannot pass through, so it cannot fall out from the end of the movable section 22.

[0096] The opening process of the water outlet 211 is as follows:

[0097] Water is introduced into the external water pipe and reaches the position of the ball 23. Since the water cannot pass through the ball 23, it is pressed in the fixed section 21 and the movable section 22. When the pressure is large enough, the water pushes the movable section 22 downward (that is, away from the fixed section 21).

[0098] At this time, the transposition piston 71 moves following the moving section 22, so that the initial state is located at the clamping free end of the linear track of the first human-shaped track 17 ( Fig.11 The limiting member 8 at the middle point A position) enters the linear track of the second human-shaped track 18 from the adjacent oblique track of the second human-shaped track 18 along the linear track. At this time, the shift piston 71 rotates. When the limiting member 8 reaches the linear track clamping free end of the second human-shaped track 18 ( Fig.11 At point B in the middle), the trigger block reaches the open position 9, and it expands outward under the elastic force of the spring to enter the open position 9. At this time, the gaps between the multiple trigger blocks become larger, and the ball 23 passes through the enlarged middle gap to fall outside the middle section 12. In addition, due to the downward squeezing of the transposition piston 71, the return spring is compressed; because the ball 23 passes through the gap in the middle of the trigger block, then, the water pressure in the moving section 22 becomes smaller, and the return spring rebounds. At this time, the transposition piston 71 follows the moving section 22 to move upward (that is, in the direction close to the fixed section 21). At this time, the limit member 8 enters the linear track of the current second human-shaped track 18 from the linear track of the second human-shaped track 18 through the oblique track of the next second human-shaped track 18, and the transposition piston 71 rotates in the same direction from point A to point B again, and reaches the free end of the linear track ( Fig.11 At point C in the middle), at this time, the moving section 22 is in the open position, the trigger block is separated from the open position 9 and retracted to the initial state, the moving section 22 has no obstruction to the water outlet 211, and the water enters the water injection space 19 through the water outlet 211. The water in the water injection space 19 pushes the pushing member 4 to move toward the cutter head 3. The cutter head 3 extends outward under the push of the pushing member 4 and compresses the reset spring 51. The cutter head 3 extends to the maximum position, and the nozzle 6 is started to discharge the water in the water injection space 19 to the outside for pressure relief. In particular, since the nozzle 6 is arranged toward the cutter head 3, the water discharged from the nozzle 6 is sprayed toward the cutter head 3 to clean the cutter head 3.

[0099] The ring process of the water outlet 211 is as follows: the ball 23 is thrown into the fixed section 21 again. Similarly, the ball 23 intercepts the water to hold the pressure. The moving section 22 moves downward. After the transposition piston 71 rotates in the same direction from point A to point B again, the limiter 8 comes to the free end of the linear track of the next second human-shaped track 18 ( Fig.11 At this time, the trigger block reaches the opening position 9. After the trigger block opens, the ball 23 passes through the trigger block and falls out of the middle section 12; then due to the resilience of the return spring, the moving section 22 moves upward, and the shifting piston 71 rotates in the same direction from point A to point B again, and the limiter 8 comes to the free end of the linear track of the next first human-shaped track 17 ( Fig.11 The trigger block is detached from the open position 9 and contracts again, the movable section 22 returns to the closed position, the water outlet 211 is closed, and the water flow to the fixed section 21 stops. The compressed return spring 51 rebounds and pushes the extended cutter head 3 into the upper section 11, and the reamer returns to the initial state.

[0100] The above operation can be repeated to cycle the opening and closing of the reamer. It should be noted that, preferably, the movable section 22 always maintains the socket connection with the fixed section 21 during the downward movement.

[0101] Embodiment 2

[0102] See also Fig. 9 and Fig.10 On the basis of the first embodiment, in order to realize the recovery of the ball 23, the shell 1 is further provided with a collecting chamber 14; the collecting chamber 14 is located at one end of the open position 9 away from the fixed section 21; specifically, the shell 1 also includes a lower section 13, preferably, the lower section 13 is plugged into one end of the middle section 12 away from the upper section 11, and the collecting chamber 14 is arranged in the lower section 13, preferably, along the falling direction of the ball 23, the collecting chamber 14 gradually shrinks from top to bottom to form a shrinking end at one end of the open position 9, the ball 23 cannot pass through the lower end of the collecting chamber 14, and then the collecting chamber 14 intercepts and collects the ball 23; alternatively, the collecting chamber 14 can be provided with a collecting net, etc., to collect the ball 23.

[0103] Furthermore, in order to prevent debris from entering the collection chamber 14 and being blocked by the ball 23 and unable to be discharged from the collection chamber 14, preferably, a collection basket 15 is also included, and a liquid leakage port 151 is provided on the surrounding side of the collection basket 15; a liquid gap is provided between the outer wall of the collection basket 15 and the inner wall of the shell 1, and an interception position 20 is provided in the middle of the collection basket 15, and the water passes through the liquid leakage port 151 and the liquid gap to bypass the interception position 20.

[0104] Specifically, the collecting basket 15 includes a main body 152, a cushion block 153 and an intercepting block 154. The main body 152 is provided with a liquid leakage port 151. Preferably, three liquid leakage ports 151 are provided at the same height position, which is a group of liquid leakage ports 151. Three groups of liquid leakage ports 151 are provided along the length direction of the main body 152. The cushion block 153 is provided on at least one end of the main body 152. The intercepting block 154 is provided in the middle of the main body 152. The intercepting position 20 is located above the intercepting block 154.

[0105] The collecting basket 15 is installed in the collecting chamber 14. Preferably, the collecting basket 15 is inserted into the collecting chamber 14; the cushion block 153 abuts against the inner wall of the collecting chamber 14 so that there is a liquid gap between the outer wall of the main body 152 and the inner wall of the collecting chamber. The ball 23 is intercepted at the intercepting block 154. When there is mud and sand and other debris in the collecting chamber, the mud and sand are discharged into the lower section 13 through the leakage port 151 and the liquid gap.

[0106] Embodiment 3

[0107] In embodiment 1, other alternative structures of the driving structure 7 include: the driving structure 7 includes: a linear motor, the end of the moving segment 22 away from the fixed segment 21 can be a closed structure, and the linear motor acts on the moving segment 22 to control the switching of the moving segment 22 between the open position and the closed position.

[0108] Alternatively, the linear motor is replaced with a rotary motor, and a through hole is provided at the sleeved portion of the movable section 22 and the fixed section 21. The rotary motor rotates to align the through hole with the water outlet 211, which is the open position of the movable section 22; the rotary motor rotates to avoid the misalignment of the through hole with the water outlet 211.

[0109] The water outlet 211 is shielded, and this is the closed position of the moving section 22 .

[0110] The technical means disclosed in the scheme of the present invention are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical schemes composed of any combination of the above-mentioned technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications are also regarded as the protection scope of the present invention.

Claims

1. Multiple opening and closing of the reamer, characterized in that: include: The housing (1) comprises an upper section (11) and a middle section (12), wherein the middle section (12) is connected to the upper section (11), and the middle parts of the upper section (11) and the middle section (12) are in communication; A core shaft (2) is sleeved in the shell (1), the core shaft comprising a fixed section (21) and a movable section (22), the fixed section (21) being fixedly arranged in the shell (1), and the fixed section (21) being provided with a water outlet (211); the movable section (22) being partially sleeved with the fixed section (21), the movable section (22) being movably arranged in the shell (1), and having an open position and a closed position, the movable section (22) being located in the open position opens the water outlet (211), and the movable section (22) being located in the closed position closes the water outlet (211); Water is introduced from one end of the fixed section (21) away from the movable section (22), and in the opposite direction of the water introduced along the fixed section (21), a cutter head (3) is movably provided on the shell (1) behind the water outlet, and the cutter head (3) is extended or retracted from the shell (1), and a push member (4) is provided at one end of the cutter head (3) close to the water outlet (211), and the push member (4) acts on the cutter head (3) to make the cutter head (3) extend out of the shell (1); A reset component (5) is arranged in the housing (1), and the reset component (5) acts on the cutter head (3) to cause the cutter head (3) to retract in the housing (1); A nozzle (6) is provided on the side wall of the shell (1), and the water in the fixed section (21) passes through the water outlet hole (211) and the nozzle (6) in sequence to be discharged outside the shell (1); The push member (4) is an annular block, the push member (4) is sleeved on the fixed section (21), the outer wall of the push member (4) is provided with a sliding groove, the inner wall of the upper section (11) is provided with a convex strip, the convex strip is arranged along the axial direction of the fixed section (21), the sliding groove is slidably connected to the convex strip, and the outer wall of the push member (4) is sealed with the inner wall of the upper section (11); Also includes a drive structure (7); The driving structure (7) comprises: a linear motor, an end of the moving section (22) away from the fixed section (21) being a closed structure, and the linear motor acts on the moving section (22) to control the moving section (22) to switch between the open position and the closed position; Alternatively, the driving structure (7) comprises: a rotating motor, a portion where the movable section (22) and the fixed section (21) are sleeved is provided with a through hole, the rotating motor rotates so that the through hole is aligned and connected with the water outlet hole (211), which is the open position of the movable section (22), and the rotating motor rotates so that the through hole and the water outlet hole (211) are offset and avoided, and the water outlet hole (211) is covered, which is the closed position of the movable section (22).

2. The multiple opening and closing reamer according to claim 1, characterized in that: The housing (1) is provided with an opening (10); The side wall of the opening (10) is provided with a first sliding structure (101), and the side wall of the cutter head (3) is provided with a second sliding structure (31); The first sliding structure (101) and the second sliding structure (31) are slidably connected.

3. The multiple opening and closing reamer according to claim 2, characterized in that: The first sliding structure (101) is arranged to be inclined from the inside to the outside.

4. The multiple opening and closing reamer according to claim 1, characterized in that: Place The reset assembly (5) comprises a reset spring (51); The return spring (51) is sleeved on the fixed section (21).

5. The multiple opening and closing reamer according to claim 4, characterized in that: The reset assembly (5) further comprises a sealing sleeve (52); The sealing sleeve (52) is arranged in the housing (1), and the fixing section (21) is inserted into the sealing sleeve (52); And / or, the return spring is embedded in the sealing sleeve (52).

6. The multiple opening and closing reamer according to claim 1, characterized in that: The number of the cutting heads (3) is multiple; And / or a plurality of the blade heads (3) are evenly spaced and arranged on the housing (1).

7. The multiple opening and closing reamer according to claim 1, characterized in that: Also includes an abutment member (16); The abutment member (16) is provided at one end of the reset component (5) close to the cutter head (3), and the reset component (5) acts on the cutter head (3) via the abutment member (16); And / or, the abutment member (16) is provided at one end of the pushing member (4) close to the cutter head (3), and the pushing member (4) pushes the cutter head (3) via the abutment member (16).

8. The multiple opening and closing reamer according to claim 1, characterized in that: The nozzle (6) is arranged toward the cutter head (3).

Images