Repeated activation type reamer

Abstract

The invention relates to the technical field of drilling equipment, and provides a multi-time activation type reamer which comprises a body, a sliding sleeve part, a first connector, a ball seat, a reaming assembly, a breakable plugging ball and a hole plugging ball, and the sliding sleeve part is provided with a flow channel; the first connector comprises a sealing section arranged on the periphery of the sliding sleeve piece in a sleeving mode and a gap section arranged on the periphery of the sliding sleeve piece in a winding mode at intervals. The ball seat is fixed in the flow channel and is provided with a ball seat opening corresponding to the flow channel; the reaming assembly comprises a trigger piece and a cutter piece. The destructible plugging ball is used for throwing and plugging the ball seat opening and increasing the hydraulic pressure of the sliding sleeve part above the ball seat, so that the sliding sleeve part moves and extrudes the triggering part; the hole plugging ball is thrown after the breakable plugging ball blocks the ball seat opening and can be used for plugging the liquid inlet hole, so that the breakable plugging ball is broken and does not block the ball seat opening any more. The hole opener capable of being activated for multiple times can conduct hole reaming activation for multiple times, can be used for hole reaming for multiple times underground, and greatly improves the hole reaming efficiency of well drilling.

Description

Technical Field

[0001] The present disclosure relates to the technical field of drilling equipment, and particularly to a multi-activation reamer. Background Art

[0002] With the continuous deepening of the understanding of the formation mechanism of oil and gas reservoirs and the continuous advancement of oil and gas field development work, the innovation of drilling tools has become crucial. The reaming technology emerged under such a background. This technology uses special reaming tools in cooperation with drill bits to sometimes enlarge the wellbore during the drilling process and close it after use.

[0003] The actual application shows that the reaming technology has shown obvious advantages in dealing with underground complex conditions, reducing the overall drilling cost, accelerating the drilling rate, improving the well construction quality and safety, etc. Therefore, reaming tools are gradually becoming one of the indispensable important tools in oil drilling operations.

[0004] The reamers in the prior art generally use hydraulic pressure to control the activation and closing of the reamer, and the main methods for hydraulic control of the reamer are mainly differential pressure-driven activation and ball-drop activation. However, whether the reamer in the prior art uses the differential pressure activation or ball-drop activation method, it can only ream once and cannot be used multiple times downhole. Moreover, the traditional single-activation reamer needs to repeatedly trip out of the hole to replace the tool during routine operations, and the average time-consuming for a single operation is 12 - 18 hours, which seriously restricts the drilling efficiency and is difficult to carry out reaming work of different diameters with high efficiency. The traditional single-activation reamer needs to repeatedly trip out of the hole to replace the tool during routine operations, and the average time-consuming for a single operation is 12 - 18 hours. In view of this, there is an urgent need for a reamer with a new structure in the market to solve the problems that the reamer in the prior art can only be activated for reaming once, cannot be used multiple times downhole, and seriously restricts the drilling efficiency. Summary of the Invention

[0005] The embodiments of the present disclosure provide a multi-activation reamer to solve the problems that the reamer in the prior art can only be activated for reaming once, cannot be used multiple times downhole, and seriously restricts the drilling efficiency.

[0006] The multi-activation reamer provided by the embodiments of the present disclosure includes a body, a sliding sleeve assembly, a first joint, a ball seat, a reaming assembly, and a breakable plug ball; The sliding sleeve assembly can be slidably inserted into the body, and a flow channel for liquid flow is formed in the sliding sleeve assembly; The first joint is fixedly arranged in the body and includes a sealing section sleeved on the outer peripheral part of the sliding sleeve assembly and a gap section spaced around the outer peripheral part of the sliding sleeve assembly; The ball seat is fixedly arranged in the flow channel and is provided with a ball seat opening corresponding to the flow channel; The reaming assembly includes a trigger member and a cutting tool member disposed below the sliding sleeve assembly, and the trigger member can expand the cutting tool member outward under the extrusion of the sliding sleeve assembly; The destructible plugging ball is used to be dropped to plug the ball seat opening and increase the hydraulic pressure of the sliding sleeve assembly above the ball seat, so that the sliding sleeve assembly moves to extrude the trigger member; Wherein, the sliding sleeve assembly is respectively provided with a liquid inlet hole and a liquid outlet hole on the circumferential walls above and below the ball seat; When the sliding sleeve assembly extrudes the trigger member, the liquid inlet hole and the liquid outlet hole are respectively in clearance communication with the inner wall side clearance of the gap section to form a temporary flow path; The multi-activatable reamer further includes a plugging ball; The plugging ball is dropped after the destructible plugging ball plugs the ball seat opening, and can be used to plug the liquid inlet hole, and further increase the hydraulic pressure of the sliding sleeve assembly above the ball seat, so that the destructible plugging ball ruptures and no longer plugs the ball seat opening.

[0007] In an implementable embodiment, it further includes an elastic reset assembly, and the elastic reset assembly is in transmission connection with the sliding sleeve assembly; In the working condition where the destructible plugging ball ruptures and no longer plugs the ball seat opening, the elastic reset assembly makes the sliding sleeve assembly move away from the trigger member and reset.

[0008] In an implementable embodiment, the elastic reset assembly includes an elastic claw and a compression spring; The elastic claw is elastically connected to the top end of the sliding sleeve assembly and the inner wall of the body respectively; The compression spring is elastically connected to the bottom end of the sliding sleeve assembly and the cutting tool member respectively; Wherein, when the sliding sleeve assembly moves towards the trigger member, the elastic claw and the compression spring respectively store elastic potential energy, and when the elastic claw and the compression spring release the elastic potential energy, they can make the sliding sleeve assembly move away from the trigger member.

[0009] In an implementable embodiment, when the sliding sleeve assembly moves away from the trigger member and resets to the initial position, the sealing section in the first joint correspondingly plugs the liquid inlet hole.

[0010] In an implementable embodiment, a plurality of liquid inlet holes are arranged at intervals along the same circumferential direction in the circumferential wall of the sliding sleeve assembly; A plurality of liquid outlet holes are arranged at intervals along the same circumferential direction in the circumferential wall of the sliding sleeve assembly.

[0011] In an implementable embodiment, the multi-activatable reamer further includes a second joint; The second joint fixing sleeve is fixedly sleeved on the peripheral wall of the sliding sleeve located below the ball seat, and the sliding sleeve can synchronously drive the second joint to move and squeeze the triggering member.

[0012] In an implementable embodiment, the triggering member is arranged as a disc spring, and the cutter member is arranged on the outer peripheral part of the disc spring; When the disc spring is squeezed by the sliding sleeve and the second joint, it can correspondingly drive the cutter member to expand outwards.

[0013] In an implementable embodiment, the multi - activatable reamer further includes a hydraulic shifting module; The hydraulic shifting module is correspondingly arranged below the reaming assembly, and can adjust the amplitude of the outward expansion of the cutter member under different hydraulic actions.

[0014] In an implementable embodiment, the hydraulic shifting module includes a flow - dividing baffle, a sliding body, a flow - blocking ball and a shifting baffle; The flow - dividing baffle is correspondingly arranged with the flow channel and can partially block the fluid; The sliding body is slidably arranged with the flow - dividing baffle, and a liquid inlet gap is formed between the lower part and the flow - dividing baffle, and a liquid outlet gap is opened at the upper part; The flow - blocking ball is installed in the sliding body through a flow - blocking spring and can block the liquid inlet gap under the elastic force of the flow - blocking spring; The shifting baffle is arranged at the liquid outlet gap above the flow - dividing baffle, and can squeeze the triggering member upwards under hydraulic action to change the amplitude of the outward expansion of the cutter member.

[0015] In an implementable embodiment, multiple groups of the flow - blocking balls and flow - blocking springs are arranged in one - to - one correspondence along the height direction of the sliding body.

[0016] The technical solutions provided by the embodiments of the present disclosure have the following advantages compared with the related technologies: The multi - activatable reamer provided by the embodiments of the present disclosure, by cleverly arranging the sliding sleeve, the ball seat, the destructible plug ball, the plugging hole ball and the reaming assembly, and by using the destructible plug ball and the plugging hole ball to respectively change the hydraulic pressure in the flow channel inside the sliding sleeve, can enable the sliding sleeve to slide downwards to trigger the outward expansion of the reaming assembly, or enable the sliding sleeve to slide upwards to make the reaming assembly contract and reset inwards, so that the multi - activatable reamer can be activated for reaming multiple times and can be used for reaming multiple times underground, greatly improving the drilling reaming efficiency.

[0017] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present disclosure, nor is it used to limit the scope of the present disclosure. Other features of the present disclosure will become easily understandable through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] By referring to the following detailed description and the accompanying drawings, the above and other objects, features, and advantages of the exemplary embodiments of the present disclosure will become readily understood. In the drawings, several embodiments of the present disclosure are shown by way of illustration and not limitation, in which: In the drawings, the same or corresponding reference numerals represent the same or corresponding parts.

[0019] Figure 1 FIG. shows a schematic diagram of the standby state of the multi-activatable eye dilator provided by an embodiment of the present disclosure; Figure 2 FIG. shows a schematic diagram of the expanded state of the multi-activatable eye dilator provided by an embodiment of the present disclosure; Figure 3 FIG. shows a schematic diagram of the reset state of the multi-activatable eye dilator provided by an embodiment of the present disclosure; Figure 4 FIG. shows a schematic diagram of the hydraulic shift module in the multi-activatable eye dilator provided by an embodiment of the present disclosure.

[0020] Description of reference numerals in the figures: 1, body; 2, sliding sleeve assembly; 21, flow channel; 22, liquid inlet hole; 23, liquid outlet hole; 24, elastic claw; 25, compression spring; 3, first joint; 31, sealing section; 32, clearance section; 4, ball seat; 41, ball seat opening; 5, second joint; 6, eye dilation assembly; 61, trigger member; 62, cutting tool member; 7, destructible plugging ball; 8, hole plugging ball; 9, hydraulic shift module; 91, flow splitting baffle; 92, sliding body; 921, liquid inlet gap; 922, liquid outlet gap; 93, flow blocking ball; 94, flow blocking spring; 95, shift baffle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] In order to make the objects, features, and advantages of the present disclosure more obvious and understandable, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present disclosure.

[0022] The embodiments of the present disclosure will be described in detail below with reference to the drawings.

[0023] Combined with Figure 1 、 Figure 2 and Figure 3As shown in the figure, an embodiment of the present disclosure provides a multi-activation type hole opener, which includes a body 1, a sliding sleeve 2, a first joint 3, a ball seat 4, a hole opening assembly 6, a breakable plugging ball 7, and a hole plugging ball 8; the sliding sleeve 2 can be slidably disposed through the body 1, and a flow channel 21 for liquid flow is formed in the sliding sleeve 2; the first joint 3 is fixedly disposed in the body 1, and includes a sealing section 31 sleeved on the outer peripheral portion of the sliding sleeve 2 and a clearance section 32 spaced around the outer peripheral portion of the sliding sleeve 2; the ball seat 4 is fixedly disposed in the flow channel 21 and is provided with a ball seat opening 41 corresponding to the flow channel 21; the hole opening assembly 6 includes a trigger member 61 and a cutter member 62 disposed below the sliding sleeve 2, and the trigger member 61 can expand the cutter member 62 outward under the extrusion of the sliding sleeve 2; the breakable plugging ball 7 is used to put and block the ball seat opening 41 and increase the hydraulic pressure of the sliding sleeve 2 above the ball seat 4, so that the sliding sleeve 2 moves to extrude the trigger member 61; Wherein, an inlet hole 22 and an outlet hole 23 are respectively formed in the upper and lower side walls of the sliding sleeve 2 on the ball seat 4; when the sliding sleeve 2 extrudes the trigger member 61, the inlet hole 22 and the outlet hole 23 are respectively in clearance communication with the inner wall side clearance of the clearance section 32 to form a temporary flow channel; the hole plugging ball 8 is put after the breakable plugging ball 7 blocks the ball seat opening 41, and can be used to block the inlet hole 22 and further increase the hydraulic pressure of the sliding sleeve 2 above the ball seat 4, so that the breakable plugging ball 7 breaks and no longer blocks the ball seat opening 41.

[0024] This multi-activation type hole opener can be specifically used in cooperation with a drilling bit equipment, and can perform multiple hole opening operations during the drilling process, such as Figure 1 As shown in the figure, when the multi-activation type hole opener is in the standby state, the flow channel 21 formed by the sliding sleeve 2 for liquid flow can directly supply and guide the liquid for flow, and the hole opening assembly 6 below the sliding sleeve 2 will not be triggered, so it will not affect the normal drilling function of the drill bit equipment.

[0025] Such as Figure 2As shown in the figure, when reaming of the wellbore is required, the destructible plug ball 7 is simply placed correspondingly into the flow channel 21 in the sliding sleeve assembly 2. In this way, the destructible plug ball 7 will correspondingly fall into the ball seat 4 in the flow channel 21 and seal the ball seat opening 41 in the ball seat 4. At this time, the flow channel 21 in the sliding sleeve assembly 2 is temporarily blocked. As the liquid continuously accumulates and pressurizes in the upper half of the flow channel 21, when a certain threshold is reached, it will drive the sliding sleeve assembly 2 to slide downward. Moreover, after the sliding sleeve assembly 2 slides downward by a certain distance, the liquid inlet hole 22 and the liquid outlet hole 23 in the sliding sleeve assembly 2 can be respectively communicated with the gaps on the inner wall side of the gap section 32 in the first joint 3, thereby forming a temporary flow channel. The cross-sectional area of the temporary flow channel is 15%-25% of that of the flow channel 21, which is used to dynamically reduce the liquid pressure in the upper half of the flow channel 21 and stabilize it at a certain pressure value. And at this time, after the sliding sleeve assembly 2 slides downward, it can also keep squeezing and triggering the trigger member 61 in the reaming assembly 6, so that the cutting tool member 62 can expand outward under the continuous squeezing action of the sliding sleeve assembly 2. In this way, the multi-activatable reamer can carry out reaming work through the outward-expanded cutting tool member 62.

[0026] As Figure 3 shown in the figure, when the multi-activatable reamer needs to be reset after the reaming of the wellbore is completed, multiple plugging balls 8 are simply placed correspondingly into the flow channel 21 in the sliding sleeve assembly 2. The plugging balls 8 will move towards the liquid inlet hole 22 under the action of hydraulic pressure and seal the liquid inlet hole 22. At this time, the temporary flow channel formed by the liquid inlet hole 22, the gap and the liquid outlet hole 23 is also blocked. The mating gap between the plugging ball 8 and the liquid inlet hole 22 in the blocked state is less than 0.5 mm. At this time, as the liquid in the upper half of the flow channel 21 in the sliding sleeve assembly 2 continuously accumulates and pressurizes, when the hydraulic pressure is greater than the bearing range of the destructible plug ball 7 (the bursting pressure of the destructible plug ball is 1.2-1.8 times the working pressure), the destructible plug ball 7 will be squeezed and burst, so that the ball seat opening 41 in the ball seat 4 is opened again. The burst destructible plug ball 7 and the plugging balls 8 will flow downward and be discharged from the ball seat opening 41. At this time, the flow channel 21 in the sliding sleeve assembly 2 resumes the liquid guiding and flowing function, and the sliding sleeve assembly 2 no longer bears the hydraulic action. In this way, it will no longer squeeze and trigger the trigger member 61 in the reaming assembly 6, and the cutting tool member 62 can contract inward and reset. The sliding sleeve assembly 2 can also slide upward correspondingly to reset (the upward sliding can adopt methods such as electromagnetic drive, hydraulic drive, elastic drive, etc.). In this way, the multi-activatable reamer can correspondingly return to Figure 1 the standby state shown in the figure and can continue to carry out reaming work when reaming is required again.

[0027] In summary, the multi - activatable eye - enlarging tool provided by the embodiments of the present disclosure cleverly sets the sliding sleeve 2, the ball seat 4, the breakable plug ball 7, the hole - plugging ball 8 and the eye - enlarging assembly 6. By using the breakable plug ball 7 and the hole - plugging ball 8 to respectively change the hydraulic pressure in the internal flow channel 21 of the sliding sleeve 2, the sliding sleeve 2 can slide downward to trigger the outward expansion of the eye - enlarging assembly 6, or the sliding sleeve 2 can slide upward to make the eye - enlarging assembly 6 contract inward for reset. Thus, the multi - activatable eye - enlarging tool can achieve 3 - 5 consecutive eye - enlarging operations of different sizes, reducing the time cost by 60% - 70%. It can be used for multiple eye - enlarging operations underground, greatly improving the efficiency of well - drilling eye - enlarging.

[0028] In an implementable embodiment, the multi - activatable eye - enlarging tool further includes an elastic reset assembly, and the elastic reset assembly is in transmission connection with the sliding sleeve 2. In the working condition where the breakable plug ball 7 breaks and no longer blocks the ball seat opening 41, the elastic reset assembly moves the sliding sleeve 2 away from the trigger 61 for reset.

[0029] Specifically, combined with Figure 1 and Figure 2 For further detailed description, an elastic reset assembly is set and in transmission connection with the sliding sleeve 2. When the sliding sleeve 2 slides downward to squeeze and trigger the trigger 61 in the eye - enlarging assembly 6, the elastic reset assembly stores elastic potential energy correspondingly. When the breakable plug ball 7 breaks and no longer blocks the ball seat opening 41, and the sliding sleeve 2 no longer bears the hydraulic action, the elastic reset assembly can correspondingly release the elastic potential energy, enabling the sliding sleeve 2 to quickly move away from the trigger 61 for upward reset movement. The sliding stroke of the sliding sleeve 2 is 15 mm - 20 mm.

[0030] The above - mentioned specific setting method of the elastic reset assembly has the beneficial effects of simple structure and being able to quickly and automatically realize the upward reset of the sliding sleeve 2.

[0031] In an implementable embodiment, the elastic reset assembly includes an elastic claw 24 and a compression spring 25. The elastic claw 24 is elastically connected to the top end of the sliding sleeve 2 and the inner wall of the body 1 respectively. The compression spring 25 is elastically connected to the bottom end of the sliding sleeve 2 and the tool member 62 respectively. When the sliding sleeve 2 moves towards the trigger 61, the elastic claw 24 and the compression spring 25 store elastic potential energy respectively, and when the elastic claw 24 and the compression spring 25 release the elastic potential energy, they can make the sliding sleeve 2 move away from the trigger 61.

[0032] Specifically, combined with Figure 1 and Figure 2For further detailed description, the elastic reset assembly is specifically set to include an elastic claw 24 and a compression spring 25. The elastic claw 24 is connected to the top end of the sliding sleeve 2, and the compression spring 25 is connected to the bottom end of the sliding sleeve 2. In this way, when the sliding sleeve 2 slides downward to squeeze the trigger member 61 in the eye enlarging assembly 6, the elastic claw 24 is stretched to store elastic potential energy, and the compression spring 25 is compressed to store elastic potential energy. When the breakable plug ball 7 breaks and no longer blocks the ball seat opening 41, and the sliding sleeve 2 no longer bears the hydraulic action, the elastic claw 24 can shorten to release elastic potential energy, and the compression spring 25 can elongate to release elastic potential energy. The two can act on the top and bottom ends of the sliding sleeve 2 in coordination at the same time, fully ensuring the function that the sliding sleeve 2 can quickly and automatically rise and reset.

[0033] In an implementable embodiment, when the sliding sleeve 2 moves away from the trigger member 61 and resets to the initial position, the sealing section 31 in the first joint 3 correspondingly blocks the liquid inlet hole 22.

[0034] Specifically, in combination with Figure 1 and Figure 2 For further detailed description, the liquid inlet hole 22 and the liquid outlet hole 23 in the peripheral wall of the sliding sleeve 2 are respectively distributed on the upper side and the lower side of the ball seat 4. In this way, when the sliding sleeve 2 squeezes the trigger member 61, the liquid inlet hole 22, the gap on the inner wall side of the gap section 32, and the liquid outlet hole 23 can correspondingly form a temporary flow channel. When the sliding sleeve 2 moves away from the trigger member 61 and resets to the initial position, the liquid inlet hole 22 is correspondingly blocked by the sealing section 31 in the first joint 3. At this time, the liquid inlet hole 22, the gap on the inner wall side of the gap section 32, and the liquid outlet hole 23 are also blocked, so that the liquid can only flow downward through the flow channel 21 in the sliding sleeve 2. After the flow channel 21 is blocked by the breakable plug ball 7, it is ensured that the liquid pressure in the upper section of the sliding sleeve 2 can be quickly increased.

[0035] In an implementable embodiment, a plurality of liquid inlet holes 22 are arranged at intervals along the same circumferential direction in the side peripheral wall of the sliding sleeve 2; a plurality of liquid outlet holes 23 are arranged at intervals along the same circumferential direction in the side peripheral wall of the sliding sleeve 2.

[0036] Specifically, in combination with Figure 1 and Figure 2 For further detailed description, a plurality of liquid inlet holes 22 are arranged at intervals along the same circumferential direction in the side peripheral wall of the sliding sleeve 2, and a plurality of liquid outlet holes 23 are arranged at intervals along the same circumferential direction in the side peripheral wall of the sliding sleeve 2. In this way, the plurality of liquid inlet holes 22, the gap on the inner wall side of the gap section 32, and the plurality of liquid outlet holes 23 can form an efficient temporary flow channel, ensuring that the upper section flow channel 21 in the sliding sleeve 2 can effectively relieve pressure and preventing the breakable plug ball 7 from being accidentally squeezed and damaged.

[0037] In an implementable embodiment, the multi-activatable reamer further includes a second joint 5; the second joint 5 is fixedly sleeved on the circumferential wall of the sliding sleeve 2 below the ball seat 4, and the sliding sleeve 2 can synchronously drive the second joint 5 to move and squeeze the trigger member 61.

[0038] Specifically, in combination with Figure 1 and Figure 2 For further detailed description, the multi-activatable reamer further includes a second joint 5 fixedly sleeved on the lower section of the sliding sleeve 2, and the sliding sleeve 2 can synchronously drive the second joint 5 to move and squeeze the trigger member 61. In this way, on the one hand, the sliding sleeve 2 and the second joint 5 can cooperate to squeeze the trigger member 61 in the reaming assembly 6 together; on the other hand, the second joint 5 can also be in abutting limit cooperation with the sealing section 31 in the first joint 3, so as to limit the upward reset position of the sliding sleeve 2 and prevent the sliding sleeve 2 from rising and resetting excessively.

[0039] In an implementable embodiment, the trigger member 61 is set as a disc spring, and the cutter member 62 is arranged on the outer peripheral part of the disc spring; when the disc spring is squeezed by the sliding sleeve 2 and the second joint 5, it can correspondingly drive the cutter member 62 to expand outwards.

[0040] Specifically setting the trigger member 61 as a disc spring and arranging the cutter member 62 on the outer peripheral part of the disc spring, so that when subjected to the downward squeezing action of the sliding sleeve 2 and the second joint 5, the disc spring can expand the cutter member 62 outwards to perform reaming work. Moreover, the disc spring itself has relatively high strength limit, yield limit, elastic limit and impact toughness, so as to effectively maintain the morphological stability and reliability of the cutter member 62 expanding outwards for reaming.

[0041] In an implementable embodiment, the multi-activatable reamer further includes a hydraulic shift module 9; the hydraulic shift module 9 is correspondingly arranged below the reaming assembly 6, and can adjust the amplitude of the outward expansion of the cutter member 62 under different hydraulic pressures, and the diameter expansion rate of the expansion amplitude of the cutter member 62 is 15%-35%.

[0042] Specifically, in combination with Figure 4 For further detailed description, arranging the hydraulic shift module 9 correspondingly below the reaming assembly 6, so that when the liquid discharged from the lower section of the flow channel 21 in the sliding sleeve 2 enters the hydraulic shift module 9, it can correspondingly adjust the shift gear of the hydraulic shift module 9 under the action of different hydraulic pressures, so as to realize the function of adjusting the amplitude of the outward expansion of the cutter member 62.

[0043] In an implementable embodiment, the hydraulic shifting module 9 includes a flow splitting baffle 91, a sliding body 92, a flow blocking ball 93, a flow blocking spring 94, and a shifting baffle 95; the flow splitting baffle 91 is correspondingly arranged with the flow channel 21 and can partially block the fluid; the sliding body 92 is slidably arranged with the flow splitting baffle 91, and a liquid inlet gap 921 is formed between the lower part and the flow splitting baffle 91, and a liquid outlet gap 922 is formed above; the flow blocking ball 93 is installed in the sliding body 92 through the flow blocking spring 94 and can block the liquid inlet gap 921 under the elastic force of the flow blocking spring 94; the shifting baffle 95 is arranged at the liquid outlet gap 922 above the flow splitting baffle 91 and can upwardly extrude the triggering member 61 under the hydraulic action to change the amplitude of the outward expansion of the tool member 62.

[0044] Specifically, in Figure 4 Further detailed description, the hydraulic shifting module 9 includes a flow splitting baffle 91, a sliding body 92, a flow blocking ball 93, a flow blocking spring 94, and a shifting baffle 95. When the liquid discharged from the lower section of the flow channel 21 in the sliding sleeve 2 enters the hydraulic shifting module 9, the liquid acts on the flow splitting baffle 91, squeezes the flow blocking ball 93 and the flow blocking spring 94 through the liquid inlet gap 921, and then is discharged through the liquid outlet gap 922 above the flow splitting baffle 91, and correspondingly impacts the shifting baffle 95, causing the shifting baffle 95 to move upward to squeeze the triggering member 61, so as to further change the amplitude of the outward expansion of the tool member 62.

[0045] The above specific setting manner of the hydraulic shifting module 9 has the beneficial effects of simple structure and being able to flexibly change the amplitude of the outward expansion of the tool member 62.

[0046] In an implementable embodiment, a plurality of sets of the flow blocking ball 93 and the flow blocking spring 94 are correspondingly arranged along the height direction of the sliding body 92.

[0047] Specifically, in Figure 4 Further detailed description, a plurality of sets of the flow blocking ball 93 and the flow blocking spring 94 are correspondingly arranged along the height direction of the sliding body 92. In this way, each set of the flow blocking ball 93 and the flow blocking spring 94 correspondingly forms a shifting gear, and the shifting size of the hydraulic shifting module 9 can be specifically adjusted according to the magnitude of the split hydraulic pressure borne by the flow splitting baffle 91, further improving the shifting effect of the hydraulic shifting module 9 on the amplitude of the outward expansion of the tool member 62.

[0048] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present disclosure, "a plurality of" means two or more unless otherwise specifically defined.

[0049] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present disclosure can easily think of changes or substitutions, which should all be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims

1. A multi-activatable eye dilator, characterized in that, Comprising: A body (1); A sliding sleeve (2) that can be slidably inserted into the body (1), and a flow channel (21) for liquid flow is formed in the sliding sleeve (2); A first joint (3) fixedly arranged in the body (1), including a sealing section (31) sleeved on the outer peripheral part of the sliding sleeve (2) and a gap section (32) spaced around the outer peripheral part of the sliding sleeve (2); A ball seat (4) fixedly arranged in the flow channel (21), and a ball seat opening (41) corresponding to the flow channel (21) is provided; An eyelet expanding assembly (6), including a trigger member (61) and a cutter member (62) arranged below the sliding sleeve (2), and the trigger member (61) can cause the cutter member (62) to expand outwards under the extrusion of the sliding sleeve (2); A destructible plugging ball (7) for placing and plugging the ball seat opening (41) and increasing the hydraulic pressure above the ball seat (4) of the sliding sleeve (2), so that the sliding sleeve (2) moves to extrude the trigger member (61); Wherein, liquid inlet holes (22) and liquid outlet holes (23) are respectively provided in the circumferential walls above and below the ball seat (4) of the sliding sleeve (2); When the sliding sleeve (2) extrudes the trigger member (61), the liquid inlet holes (22) and the liquid outlet holes (23) are respectively in clearance communication with the inner wall side of the gap section (32) to form a temporary flow channel; The multi - activatable eyelet expander further includes a plugging ball (8); The plugging ball (8) is placed after the destructible plugging ball (7) plugs the ball seat opening (41), and can be used to plug the liquid inlet holes (22), and further increase the hydraulic pressure above the ball seat (4) of the sliding sleeve (2), so that the destructible plugging ball (7) ruptures and no longer plugs the ball seat opening (41).

2. The multiple-activation type eye dilator according to claim 1, wherein It further includes an elastic reset assembly, and the elastic reset assembly is in transmission connection with the sliding sleeve (2); In the working condition where the destructible plugging ball (7) ruptures and no longer plugs the ball seat opening (41), the elastic reset assembly causes the sliding sleeve (2) to move away from the trigger member (61) and reset.

3. The multi-activatable eye dilator according to claim 2, characterized in that, The elastic reset assembly includes: Elastic claws (24) elastically connected to the top end of the sliding sleeve (2) and the inner wall of the body (1) respectively; A compression spring (25) elastically connected to the bottom end of the sliding sleeve (2) and the cutter member (62) respectively; Wherein, when the sliding sleeve (2) moves towards the trigger member (61), the elastic claws (24) and the compression spring (25) respectively store elastic potential energy, and when the elastic claws (24) and the compression spring (25) release the elastic potential energy, they can cause the sliding sleeve (2) to move away from the trigger member (61).

4. The multi-activatable eye dilator according to claim 2, wherein, When the sliding sleeve (2) moves away from the trigger member (61) and resets to the initial position, the sealing section (31) in the first joint (3) correspondingly plugs the liquid inlet holes (22).

5. The multi-activatable eye expander according to claim 4, wherein, A plurality of the liquid inlet holes (22) are arranged at intervals along the same circumferential direction in the circumferential wall of the sliding sleeve (2); A plurality of the liquid outlet holes (23) are arranged at intervals along the same circumferential direction in the side peripheral wall of the sliding sleeve assembly (2).

6. The multiple-activation type eye dilator according to claim 1, characterized in that, It further includes a second joint (5); The second joint (5) is fixedly sleeved on the peripheral wall of the sliding sleeve assembly (2) below the ball seat (4), and the sliding sleeve assembly (2) can synchronously drive the second joint (5) to move and squeeze the trigger member (61).

7. The multi-activatable eye expander according to claim 6, wherein The trigger member (61) is arranged as a disc spring, and the cutter member (62) is arranged on the outer peripheral part of the disc spring; When the disc spring is squeezed by the sliding sleeve assembly (2) and the second joint (5), it can correspondingly drive the cutter member (62) to expand outwards.

8. The multi-activatable eye expander according to any one of claims 1 to 7, characterized in that, It further includes a hydraulic shifting module (9); The hydraulic shifting module (9) is correspondingly arranged below the reaming assembly (6), and can adjust the amplitude of the outward expansion of the cutter member (62) under different hydraulic pressures.

9. The multi-activatable reamer according to claim 8, wherein, The hydraulic shifting module (9) includes: A flow dividing baffle (91), which is correspondingly arranged with the flow channel (21) and can partially block the fluid; A sliding body (92), which is slidably arranged with the flow dividing baffle (91), and an inlet liquid gap (921) is formed between the lower part and the flow dividing baffle (91), and an outlet liquid gap (922) is formed above; A blocking ball (93), which is installed in the sliding body (92) through a blocking spring (94), and can block the inlet liquid gap (921) under the elastic force of the blocking spring (94); A shifting baffle (95), which is arranged at the outlet liquid gap (922) above the flow dividing baffle (91), and can squeeze the trigger member (61) upwards under hydraulic pressure to change the amplitude of the outward expansion of the cutter member (62).

10. The multi-activatable eye expander according to claim 9, characterized in that, A plurality of groups of the blocking balls (93) and the blocking springs (94) are arranged in one-to-one correspondence in the sliding body (92) along the height direction.

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