Repeated switching device

Abstract

The invention relates to the field of oil exploitation, in particular to a repeated opening and closing device which comprises a main tool (100), an opening tool (200) and a closing tool (300). The first positioning convex ring block (24) and the first opening convex ring block (26) can be arranged in the limiting groove (4) and the opening groove (9) respectively; the second split cylinder elastic piece (525) is sequentially provided with a second positioning convex ring block (524) and a closing convex ring block (528) in the direction from the second oil pipe joint (516) to the second guide head (517), and the second positioning convex ring block (524) and the closing convex ring block (528) can be arranged in the limiting groove (4) and the closing groove (7) respectively. The opening tool (200) or the closing tool (300) is fixed to the upper connector (1), and therefore the effect of opening and closing the screen holes (2) is achieved.

Description

Technical Field

[0001] The present invention relates to the field of oil extraction, and particularly to a repeatable switching tool used in the production completion process of oil and gas wells. Background Art

[0002] In the later stage of oil well exploitation, due to reasons such as differences in reservoir permeability, problems such as bottom water coning and single-layer breakthrough occur during the production process, resulting in a rapid increase in water cut and a decrease in recovery rate. Currently, the in-tube sectional water control technology has deficiencies: on the one hand, the later-stage sectional sealing is prone to failure, leading to the failure of sectional water control; on the other hand, moving the pipe string is required for changing the production well section, increasing the operation cost. Therefore, an invention of a tool is needed to be run into the well during the completion process to achieve selective repeatable switching control for the water-producing layer and achieve the purpose of stabilizing oil production and controlling water cut.

[0003] Patents of the same type of technology as the applied patent, namely "A Repeatable Switching Sleeve Mechanism for Casing Sleeves" (201810379092.7) and "A Fully Pass-Through Infinite-Stage Fracturing Sleeve with Repeatable Switching" (202310003453.9), are retrieved. Although the above two patent technologies give roughly the same technical effects, they cannot achieve refined selective construction, cannot control the high water cut section to stop production, and cannot achieve the purpose of stabilizing oil production and controlling water cut, increasing production and reducing consumption.

[0004] In other words, the above two patents cannot stably achieve the opening and closing of the sieve holes.

[0005] Therefore, there is currently a need for a repeatable switching device that can achieve refined selective construction, cannot control the high water cut section to stop production, and cannot achieve the purpose of stabilizing oil production and controlling water cut, increasing production and reducing consumption. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a repeatable switching device that can achieve refined selective construction, cannot control the high water cut section to stop production, and cannot achieve the purpose of stabilizing oil production and controlling water cut, increasing production and reducing consumption.

[0007] The object of the present invention is to develop a repeatable switching tool used in the production process of oil and gas wells to achieve selective water control exploitation and reduce the water cut in exploitation. This tool is used for the production completion construction operation of oil and gas wells.

[0008] A repeatable switching device of the present invention includes a main tool, an opening tool, and a closing tool;

[0009] The main tool includes an upper sub, screen holes, a switch sleeve, a limit groove, a closing groove, an opening groove, and a lower sub; the upper sub is fixed to the lower sub, the upper sub is provided with screen holes, the screen holes can be sealed and blocked by the switch sleeve, the switch sleeve is sleeved in the upper sub and moves along it, the inner circumferential surface of the switch sleeve is axially provided with a limit groove, a closing groove, and an opening groove in sequence from the upper sub to the lower sub, and the slot widths of the limit groove, the closing groove, and the opening groove increase in sequence;

[0010] The opening tool includes a first tubing sub, a first guide head, a first positioning ring block, a first split barrel spring piece, and a first opening ring block; the first tubing sub can be fixed to the upper sub, the first tubing sub and the first guide head are fixedly connected, both ends of the first split barrel spring piece are fixedly connected to the first tubing sub and the first guide head respectively, the first split barrel spring piece is sequentially provided with a first positioning ring block and a first opening ring block from the first tubing sub to the first guide head direction, and the first positioning ring block and the first opening ring block can be respectively arranged in the limit groove and the opening groove;

[0011] The closing tool includes a second tubing sub, a second guide head, a second positioning ring block, a second split barrel spring piece, and a closing ring block; the second tubing sub can be fixed to the upper sub, the second tubing sub and the second guide head are fixedly connected, both ends of the second split barrel spring piece are fixedly connected to the second tubing sub and the second guide head respectively, the second split barrel spring piece is sequentially provided with a second positioning ring block and a closing ring block from the second tubing sub to the second guide head direction, and the second positioning ring block and the closing ring block can be respectively arranged in the limit groove and the closing groove.

[0012] In a repeated switching device of the present invention, the upper sub is provided with an external thread, the lower sub is provided with an internal thread connected to the external thread, the upper sub is provided with a second through hole, a switch button base that moves along it is arranged in the second through hole, the length direction of the switch button base is an arc protruding outward, a first card slot is arranged on the outer surface of the switch button base, a switch button spring piece is arranged in the first card slot, the length direction of the switch button spring piece is an arc protruding outward, and the outer surface of the switch button spring piece abuts against the lower sub;

[0013] The arc-shaped surface on the inner side of the switch button base overlaps with the arc-shaped surface on the outer side of the arc-shaped button, the arc-shaped button is arranged in a first through hole opened in the opening groove of the switch sleeve and moves along it, and the length direction of the arc-shaped button is an arc protruding outward;

[0014] The closing groove of the switch sleeve is also provided with the first through hole and the arc-shaped button.

[0015] A repeated switch device of the present invention, wherein a limit sliding sleeve, a return spring, a limit block and a limit block pin are arranged in the switch sliding sleeve; the limit sliding sleeve is arranged in the switch sliding sleeve and moves along it, one end of the limit sliding sleeve is fixed to the return spring, the other end of the return spring is fixed to the switch sliding sleeve, the outer surface of the limit sliding sleeve can abut against the limit block pin, the limit block pin is connected to the switch sliding sleeve by a bearing through the limit block, and the limit block pin can overlap with the inner surface of the first split cylinder spring piece or the second split cylinder spring piece.

[0016] A repeated switch device of the present invention, wherein an opening split cylinder is provided on the outer circumferential surface of the first oil pipe joint and the first guide head of the opening tool together.

[0017] A repeated switch device of the present invention, wherein a closing split cylinder is provided on the outer circumferential surface of the second oil pipe joint and the second guide head of the closing tool together.

[0018] A repeated switch device of the present invention, wherein the inner circumferential surface of the switch sliding sleeve is threadedly connected to the outer circumferential surface of the limit bolt, and the outer circumferential surface of the limit bolt can be in a limit overlap with the inner surface of the limit block pin.

[0019] A repeated switch device of the present invention, wherein multiple sets of structures composed of the limit sliding sleeve, the return spring, the limit block and the limit block pin are evenly distributed along the circumferential direction of the switch sliding sleeve.

[0020] A repeated switch device of the present invention, wherein one end of the limit block pin away from the limit sliding sleeve is hemispherical.

[0021] A repeated switch device of the present invention, wherein the width of the limit block pin gradually increases from the side close to the limit sliding sleeve to the side away from the limit sliding sleeve.

[0022] A repeated switch device of the present invention, wherein the end faces of the first guide head and the second guide head are hemispherical.

[0023] The difference between a repeated switch device of the present invention and the prior art lies in that the repeated switch device of the present invention realizes the effect of opening and closing the screen holes by fixing an opening tool or a closing tool at the upper joint. Among them, the first positioning convex ring block and the first opening convex ring block of the opening tool with different widths are arranged in the limiting groove and the opening groove, so that the switch sliding sleeve can move along with the movement of the opening tool, and in cooperation with the fixed position of the opening tool, the screen holes can be opened without being sealed and blocked by the switch sliding sleeve; the second positioning convex ring block and the closing convex ring block of the closing tool with different widths are arranged in the limiting groove and the closing groove, so that the switch sliding sleeve can move along with the movement of the closing tool, and in cooperation with the fixed position of the closing tool, the screen holes can be opened without being sealed and blocked by the switch sliding sleeve.

[0024] The following further describes a repeated switch device of the present invention with reference to the accompanying drawings. Description of the Drawings

[0025] Figure 1 is a cross-sectional schematic view of the main tool of a repeated switch device;

[0026] Figure 2 is a cross-sectional schematic view of the opening tool of a repeated switch device;

[0027] Figure 3 is a cross-sectional schematic view of the closing tool of a repeated switch device.

[0028] Reference numerals: main tool 100, opening tool 200, closing tool 300, upper joint 1, screen hole 2, switch sliding sleeve 3, limiting groove 4, closing groove 7, opening groove 9, lower joint 13, first oil pipe joint 16, first guiding head 17, first positioning convex ring block 24, first split cylinder spring piece 25, first opening convex ring block 26, second oil pipe joint 516, second guiding head 517, second positioning convex ring block 524, second split cylinder spring piece 525, closing convex ring block 528. A limiting sliding sleeve 18, a return spring 19, a limiting block 20 and a limiting block pin 21 are arranged in the switch sliding sleeve 3. Detailed Embodiment

[0029] As Figures 1 to 3 shown, a repeated switch device of the present invention is characterized in that it includes a main tool 100, an opening tool 200 and a closing tool 300;

[0030] See Figure 1, the main tool 100 includes an upper sub 1, a screen hole 2, a switch sleeve 3, a limit groove 4, a closing groove 7, an opening groove 9, and a lower sub 13; the upper sub 1 is fixed to the lower sub 13, the upper sub 1 is provided with a screen hole 2, the screen hole 2 can be sealed and blocked by the switch sleeve 3, the switch sleeve 3 is sleeved in the upper sub 1 and moves along it, and the inner circumferential surface of the switch sleeve 3 is axially provided with a limit groove 4, a closing groove 7, and an opening groove 9 in sequence from the upper sub 1 to the lower sub 13, and the groove widths of the limit groove 4, the closing groove 7, and the opening groove 9 increase in sequence;

[0031] See Figure 2 , the opening tool 200 includes a first tubing joint 16, a first guide head 17, a first positioning ring block 24, a first split cylinder spring piece 25, and a first opening ring block 26; the first tubing joint 16 can be fixed to the upper sub 1, the first tubing joint 16 and the first guide head 17 are fixedly connected, both ends of the first split cylinder spring piece 25 are fixedly connected to the first tubing joint 16 and the first guide head 17 respectively, the first split cylinder spring piece 25 is sequentially provided with a first positioning ring block 24 and a first opening ring block 26 from the first tubing joint 16 to the first guide head 17 direction, and the first positioning ring block 24 and the first opening ring block 26 can be respectively arranged in the limit groove 4 and the opening groove 9;

[0032] See Figure 3 , the closing tool 300 includes a second tubing joint 516, a second guide head 517, a second positioning ring block 524, a second split cylinder spring piece 525, and a closing ring block 528; the second tubing joint 516 can be fixed to the upper sub 1, the second tubing joint 516 and the second guide head 517 are fixedly connected, both ends of the second split cylinder spring piece 525 are fixedly connected to the second tubing joint 516 and the second guide head 517 respectively, the second split cylinder spring piece 525 is sequentially provided with a second positioning ring block 524 and a closing ring block 528 from the second tubing joint 516 to the second guide head 517 direction, and the second positioning ring block 524 and the closing ring block 528 can be respectively arranged in the limit groove 4 and the closing groove 7.

[0033] The present invention realizes the effect of opening and closing the screen holes 2 by fixing an opening tool 200 or a closing tool 300 at the upper joint 1. Among them, the first positioning convex ring blocks 24 and the first opening convex ring blocks 26 of the opening tool 200 with different widths are configured in the limit groove 4 and the opening groove 9, so that the switch sliding sleeve 3 can move along with the movement of the opening tool 200. And in cooperation with the fixed position of the opening tool, the screen holes 2 can be opened without being sealed and blocked by the switch sliding sleeve 3; the second positioning convex ring blocks 524 and the closing convex ring blocks 528 of the closing tool 300 with different widths are configured in the limit groove 4 and the closing groove 7, so that the switch sliding sleeve 3 can move along with the movement of the closing tool. And in cooperation with the fixed position of the closing tool 300, the screen holes 2 can be opened without being sealed and blocked by the switch sliding sleeve 3.

[0034] The present invention provides a repeated switching tool for the construction process of the oil and gas well water control completion technology. The tool includes a main body tool, an opening tool and a closing tool; the main body tool includes an upper joint 1, a screen hole 2, a switch sliding sleeve 3, a limit groove 4, a guiding groove 5, a guiding key 6, a closing groove 7, a closing button 8, an opening groove 9, an opening button 10, a switch button spring piece 11, a switch button base 12, a lower joint 13, an "O" - shaped rubber ring 14, an "O" - shaped rubber ring 15; the opening tool includes a tubing joint 16, a guiding head 17, a limit sliding sleeve 18, a return spring 19, a limit block 20, a limit block pin 21, a limit bolt 22, an opening split cylinder 23, a positioning convex ring block 24, a split cylinder spring piece 25, an opening convex ring block 26, an "O" - shaped rubber ring 29; the closing tool includes a tubing joint 16, a guiding head 17, a limit sliding sleeve 18, a return spring 19, a limit block 20, a limit block pin 21, a limit bolt 22, a closing split cylinder 27, a positioning convex ring block 24, a split cylinder spring piece 25, a closing convex ring block 28, an "O" - shaped rubber ring 29.

[0035] The upper joint 1 is threadedly connected to the lower joint 13. The switch sliding sleeve 3 is installed inside the upper joint 1. By means of the closing button 8, the opening slot 9, the opening button 10, the switch button spring piece 11, and the switch button base 12, the outward extrusion and inward reset actions are realized to achieve axial movement inside the upper joint 1. Along the axial direction on the outer side of the switch sliding sleeve 3, a guiding slot 5 is opened. The guiding key 6 is threadedly fixed on the upper joint 1. The front end of the guiding key 6 is inside the guiding slot 5 and has a gap with the guiding slot 5 to ensure the free sliding of the switch sliding sleeve 3. The tubing joint 16 is threadedly connected to the guiding head 17. The two ends of the opening split cylinder 23 and the closing split cylinder 27 are respectively sleeved on the steps of the tubing joint 16 and the guiding head 17. The limit block pin 21 passes through the middle hole of the limit block 20 to install the limit block 20 on the side wall of the tubing joint 16. The limit block pin 21 is threadedly connected to the side wall of the tubing joint 16. The limit bolt 22 is threadedly connected and fixed on the inner wall of the tubing joint 16. The reset spring 19 in a compressed state is next to its upper end. The other end of the reset spring 19 is inside the limit sliding sleeve 18. The upper end face of the limit sliding sleeve 18 abuts against the raised step on the inner wall of the tubing joint 16.

[0036] The beneficial effects of the present invention are as follows: The present invention is applicable to the refined selective construction requirements in the late stage of oil and gas well exploitation under the condition of high water cut. By means of the tool for selectively closing the water-producing section, it is realized to control the high water cut well section to stop production, while the low water cut well section still produces normally, thereby reducing the water cut of the production well, achieving the purpose of stabilizing oil production, controlling water cut, increasing production and reducing consumption, having good economic and social benefits, and having a wide application prospect.

[0037] As Figure 1 shown, a repeated switch tool of the present invention, this tool includes a main body tool, an opening tool, and a closing tool; one of the main body tools includes an upper joint 1, a screen hole 2, a switch sliding sleeve 3, a limit slot 4, a guiding slot 5, a guiding key 6, a closing slot 7, a closing button 8, an opening slot 9, an opening button 10, a switch button spring piece 11, a switch button base 12, a lower joint 13, an "O" - shaped rubber ring 14, an "O" - shaped rubber ring 15; the second opening tool includes a tubing joint 16, a guiding head 17, a limit sliding sleeve 18, a reset spring 19, a limit block 20, a limit block pin 21, a limit bolt 22, an opening split cylinder 23, a positioning convex ring block 24, a split cylinder spring piece 25, an opening convex ring block 26; the third closing tool includes a tubing joint 16, a guiding head 17, a limit sliding sleeve 18, a reset spring 19, a limit block 20, a limit block pin 21, a limit bolt 22, a closing split cylinder 27, a positioning convex ring block 24, a split cylinder spring piece 25, a closing convex ring block 28.

[0038] The operation process of using the repeated switch tool of the present invention is as follows:

[0039] During the operation of running in the completion string, the predetermined position in the completion string connected to the main tool of the repeated switch tool is run into the wellbore along with the completion string. In the main tool, the switch sleeve 3 is at the step position above the upper joint 1, and the screen holes 2 are in the closed state. The sealing functions of the "O" - ring 14 and the "O" - ring 15 ensure the sealing performance of the completion tool string during the cementing operation;

[0040] During the tool opening operation, the opening tool is connected to the delivery string and run into the completion string. When the positioning lug block 24 and the opening lug block 26 on the opening tool reach the corresponding limit slots 4 and the opening slots 9 on the main tool of the completion string, the split - cylinder spring piece *25 of the opening tool radially pops up. The positioning lug block 24 and the opening lug block 26 pop up with the split - cylinder spring piece 25 and are embedded into the corresponding limit slots 4 and the opening slots 9. The opening lug block 26 radially presses the opening button 10 and the switch button base 12 under the action of the elastic force, causing them to move outward under pressure and compress the switch button spring piece 11, releasing the locked state of the switch sleeve 3. The switch sleeve 3 moves downward to reach the step part of the lower joint 13 at the lower part of the main tool. At this time, the closing button 8 in the closing slot 7 coincides with the switch button base 12. The switch button base 12 moves radially inward under the elastic force of the switch button spring piece 11, resulting in the switch sleeve 3 being in a state where the screen holes 2 are in the open - locked state;

[0041] During the tool closing operation, the closing tool is connected to the delivery string and run into the completion string. When the positioning lug block 24 and the closing lug block 28 on the closing tool reach the corresponding upper limit slots 4 and the closing slots 7 on the main tool of the completion string, the split - cylinder spring piece 25 of the closing split - cylinder radially pops up. The positioning lug block 24 and the closing lug block 28 pop up with the split - cylinder spring piece 25 and are embedded into the corresponding upper limit slots 4 and the closing slots 7. The closing lug block 28 radially presses the closing button 8 and the switch button base 12 under the action of the elastic force. Under the pressure of the closing tool, they move radially outward, compress the switch button spring piece 11, release the locked state of the switch sleeve 3. The switch sleeve 3 moves upward to reach the top of the tool. The opening button 10 in the opening slot 9 coincides with the switch button base 12. The switch button base 12 moves radially inward under the elastic force of the switch button spring piece 11, resulting in the switch sleeve 3 being in a state where the screen holes 2 are in the closed - locked state.

[0042] When starting or closing the operation, the liquid in the pipe can be circulated by pumping liquid at the wellhead. The limit sliding sleeve 18 moves downward under the action of the circulating pressure difference and compresses the return spring 19. At the same time, it pushes the limit block 20 to rotate outward around the limit bolt 22. The limit block 20 squeezes the split cylinder elastic piece 25, so as to ensure that the positioning convex ring block 24, the opening convex ring block 26 or the closing convex ring block 28 is limited in the positioning groove, the opening groove 9 or the closing groove 7, and pushes the switch sliding sleeve 3 to move downward or upward to open or close the screen holes 2. When the wellhead stops pumping liquid and the circulating pressure difference disappears, the limit sliding sleeve 18 returns to its original position under the elastic force of the return spring 19, releasing the extrusion on the limit block 20. The split cylinder elastic piece 25 can be compressed inward, and the opening or closing tool is lifted out to complete the opening and closing operation.

[0043] Wherein, the first split cylinder elastic piece 25 and the second split cylinder elastic piece 525 are both elastic and can always protrude toward the radial outside.

[0044] Wherein, the width of the first positioning convex ring block 24 can be matched with the opening width of the limit groove 4, the width of the first opening convex ring block 26 can be matched with the opening width of the opening groove 9, and the distance from the first positioning convex ring block 24 to the first opening convex ring block 26 is the same as the distance from the limit groove 4 to the opening groove 9.

[0045] Wherein, the width of the second positioning convex ring block 524 can be matched with the opening width of the limit groove 4, the width of the closing convex ring block 528 can be matched with the opening width of the closing groove 7, and the distance from the second positioning convex ring block 524 to the closing convex ring block 528 is the same as the distance from the limit groove 4 to the closing groove 7.

[0046] As a further explanation of the present invention, see Figure 1 , the upper joint 1 is provided with an external thread, the lower joint 13 is provided with an internal thread connected to the external thread, the upper joint 1 is provided with a second through hole 312, a switch button base 12 moving along it is arranged in the second through hole 312, the length direction of the switch button base 12 is an arc protruding toward the outside, a first card slot 313 is arranged on the outer surface of the switch button base 12, a switch button elastic piece 11 is arranged in the first card slot 313, the length direction of the switch button elastic piece 11 is an arc protruding outward, and the outer surface of the switch button elastic piece 11 abuts against the lower joint 13;

[0047] The arc-shaped surface on the inner side of the switch button base 12 abuts against the arc-shaped surface on the outer side of the arc-shaped button 10. The arc-shaped button 10 is arranged in the first through hole 311 opened in the opening groove 9 of the switch sliding sleeve 3 and moves along it. The length direction of the arc-shaped button 10 is an arc protruding outward;

[0048] The closing slot 7 of the switch sliding sleeve 3 is also provided with the first through hole 311 and the arc-shaped button 10.

[0049] In the present invention, by arranging the first through hole and the arc-shaped button 10 in both the opening slot 9 and the closing slot 7 of the switch sliding sleeve 3, the arc-shaped surface of the arc-shaped button 10 can be abutted against the arc-shaped surface of the switch button base 12, thereby increasing the alignment accuracy, making the moving position of the switch sliding sleeve 3 more accurate, and reducing unnecessary play. And it should be noted that when the arc-shaped button 10 does not press down the switch button base 12, the switch button base 12 is simultaneously arranged in the first through hole 311 and the second through hole 312, so that the switch sliding sleeve 3 cannot move relative to the upper joint 1. When the arc-shaped button 10 is pressed down by the first opening ring block 26 or the closing ring block 528, when the arc-shaped button 10 presses down the switch button spring piece 11 to a relatively flat state, the switch button base 12 is located in the second through hole 312 and not in the first through hole 311, so that the switch sliding sleeve 3 can move relative to the upper joint 1.

[0050] Among them, the first through hole 311 can limit the maximum up and down position of the arc-shaped button 10.

[0051] As a further explanation of the present invention, see Figure 1 、 2 , a limiting sliding sleeve 18, a return spring 19, a limiting block 20 and a limiting block pin 21 are arranged in the switch sliding sleeve 3; the limiting sliding sleeve 18 is arranged in the switch sliding sleeve 3 and moves along it, one end of the limiting sliding sleeve 18 is fixed to the return spring 19, the other end of the return spring 19 is fixed to the switch sliding sleeve 3, the outer surface of the limiting sliding sleeve 18 can abut against the limiting block pin 21, the limiting block pin 21 is connected to the switch sliding sleeve 3 by a bearing through the limiting block 20, and the limiting block pin 21 can lap with the inner surface of the first split cylinder spring piece 25 or the second split cylinder spring piece 525.

[0052] In the present invention, the limiting sliding sleeve 18 is used to receive the downward pressure of the water flow to drive the limiting block pin 21 to push up the first split cylinder spring piece 25 or the second split cylinder spring piece 525 outwards, thereby improving the fixing firmness between the main body tool 100 and the opening tool 200 and the closing tool 300.

[0053] Among them, a limiting ring for limiting the limiting sliding sleeve 18 is inwardly opened on the inner circumferential surface of the switch sliding sleeve 3.

[0054] Among them, a water receiving ring is inwardly opened on the upper end surface of the limiting sliding sleeve 18, so as to better receive the downward pressure brought by the water flow.

[0055] Among them, in the present inventionFigure 1 , 2 , 3 are both horizontally arranged, but in the present invention, the upper and lower directions are both based on the Figure 1 , 2 left and right directions in 3.

[0056] For further explanation of the present invention, refer to Figure 1 , 2 , the first oil pipe joint 16 and the first guide head 17 of the opening tool 200 are jointly provided with an opening split cylinder 23 on their outer circumferential surfaces.

[0057] In the present invention, through the form of clamping connection between the opening split cylinder 23 and the first split cylinder elastic piece 25, the first split cylinder elastic piece 25 is fixed to the first oil pipe joint 16 and the first guide head 17, so as to achieve better fixing effect and replaceable effect.

[0058] Among them, the opening split cylinder 23 can be understood as an annular groove, and the annular first split cylinder elastic piece 25 is arranged inside.

[0059] For further explanation of the present invention, refer to Figure 1 , 3 , the second oil pipe joint 516 and the second guide head 517 of the closing tool 300 are jointly provided with a closing split cylinder 27 on their outer circumferential surfaces.

[0060] In the present invention, through the form of clamping connection between the closing split cylinder 27 and the second split cylinder elastic piece 525, the second split cylinder elastic piece 525 is fixed to the second oil pipe joint 516 and the second guide head 517, so as to achieve better fixing effect and replaceable effect.

[0061] For further explanation of the present invention, refer to Figure 1 , 2 , the inner circumferential surface of the switch sliding sleeve 3 is threadedly connected to the outer circumferential surface of the sum limit bolt 22, and the outer circumferential surface of the sum limit bolt 22 can be in limit lap joint with the inner surface of the limit block pin 21.

[0062] In the present invention, the limit bolt can better limit the limit block pin 21, so as to ensure that it can only swing outwards.

[0063] For further explanation of the present invention, refer to Figure 1 , 2 , multiple sets of structures composed of the limit sliding sleeve 18, the return spring 19, the limit block 20 and the limit block pin 21 are evenly distributed along the circumferential direction of the switch sliding sleeve 3.

[0064] The present invention can achieve better outward support for the first split cylinder spring piece 25 or the second split cylinder spring piece 525 through multiple groups of the above-mentioned structures.

[0065] As a further explanation of the present invention, refer to Figure 1 , 2 , one end of the limit block pin 21 away from the limit sliding sleeve 18 is hemispherical.

[0066] The present invention can support the first split cylinder spring piece 25 or the second split cylinder spring piece 525 more smoothly through the hemispherical limit block pin 21.

[0067] As a further explanation of the present invention, refer to Figure 1 , 2 , the width of the limit block pin 21 gradually increases from near the limit sliding sleeve 18 to away from the limit sliding sleeve 18.

[0068] The present invention can support the first split cylinder spring piece 25 or the second split cylinder spring piece 525 more smoothly through the limit block pin 21 with the gradually increasing width.

[0069] As a further explanation of the present invention, refer to Figure 1 , 3 , the end faces of the first guide head 17 and the second guide head 517 are hemispherical.

[0070] The present invention can be more conveniently configured in the main body tool 100 through the first guide head 17 and the second guide head 517 with the hemispherical end faces.

[0071] The embodiments described above are only for describing the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention should fall within the protection scope determined by the claims of the present invention.

Claims

1. A repeated switching device, characterized in that: it includes a main body tool (100), an opening tool (200) and a closing tool (300); The main body tool (100) includes an upper joint (1), a screen hole (2), a switching sliding sleeve (3), a limiting groove (4), a closing groove (7), an opening groove (9), and a lower joint (13); the upper joint (1) is fixed to the lower joint (13), the upper joint (1) is provided with a screen hole (2), the screen hole (2) can be sealed and blocked by the switching sliding sleeve (3), the switching sliding sleeve (3) is sleeved in the upper joint (1) and moves along it, and the inner circumferential surface of the switching sliding sleeve (3) is axially provided with a limiting groove (4), a closing groove (7), and an opening groove (9) in sequence from the upper joint (1) to the lower joint (13), and the widths of the openings of the limiting groove (4), the closing groove (7), and the opening groove (9) increase in sequence; The opening tool (200) includes a first oil pipe joint (16), a first guiding head (17), a first positioning convex ring block (24), a first split barrel spring piece (25) and a first opening convex ring block (26); the first oil pipe joint (16) can be fixed to the upper joint (1), the first oil pipe joint (16) and the first guiding head (17) are fixedly connected, both ends of the first split barrel spring piece (25) are fixedly connected to the first oil pipe joint (16) and the first guiding head (17) respectively, the first split barrel spring piece (25) is provided with a first positioning convex ring block (24) and a first opening convex ring block (26) in sequence from the first oil pipe joint (16) to the first guiding head (17) direction, and the first positioning convex ring block (24) and the first opening convex ring block (26) can be respectively arranged in the limiting groove (4) and the opening groove (9); The closing tool (300) includes a second oil pipe joint (516), a second guiding head (517), a second positioning convex ring block (524), a second split barrel spring piece (525) and a closing convex ring block (528); the second oil pipe joint (516) can be fixed to the upper joint (1), the second oil pipe joint (516) and the second guiding head (517) are fixedly connected, both ends of the second split barrel spring piece (525) are fixedly connected to the second oil pipe joint (516) and the second guiding head (517) respectively, the second split barrel spring piece (525) is provided with a second positioning convex ring block (524) and a closing convex ring block (528) in sequence from the second oil pipe joint (516) to the second guiding head (517) direction, and the second positioning convex ring block (524) and the closing convex ring block (528) can be respectively arranged in the limiting groove (4) and the closing groove (7).

2. A repeated switching device according to claim 1, characterized in that: The upper joint (1) is provided with an external thread, the lower joint (13) is provided with an internal thread connected to the external thread, the upper joint (1) is provided with a second through hole (312), a switch button base (12) moving along it is arranged in the second through hole (312), the length direction of the switch button base (12) is an arc protruding towards the outside, a first card slot (313) is arranged on the outer surface of the switch button base (12), a switch button spring piece (11) is arranged in the first card slot (313), the length direction of the switch button spring piece (11) is an arc protruding outwards, and the outer surface of the switch button spring piece (11) abuts against the lower joint (13); The arc-shaped surface on the inner side of the switch button base (12) is lapped with the arc-shaped surface on the outer side of the arc-shaped button (10), the arc-shaped button (10) is arranged in a first through hole (311) opened in the opening slot (9) of the switch sliding sleeve (3) and moves along it, and the length direction of the arc-shaped button (10) is an arc protruding outwards; The first through hole (311) and the arc-shaped button (10) are also arranged in the closing slot (7) of the switch sliding sleeve (3).

3. A repeated switch device according to claim 2, characterized in that: A limiting sliding sleeve (18), a return spring (19), a limiting block (20) and a limiting block pin (21) are arranged in the switch sliding sleeve (3); the limiting sliding sleeve (18) is arranged in the switch sliding sleeve (3) and moves along it, one section of the limiting sliding sleeve (18) is fixed to the return spring (19), the other end of the return spring (19) is fixed to the switch sliding sleeve (3), the outer surface of the limiting sliding sleeve (18) can abut against the limiting block pin (21), the limiting block pin (21) is connected to the switch sliding sleeve (3) by a bearing through the limiting block (20), and the limiting block pin (21) can be lapped with the inner surface of the first split cylinder spring piece (25) or the second split cylinder spring piece (525).

4. A repeated switch device according to claim 1, characterized in that: An opening split cylinder (23) is jointly arranged on the outer circumferential surface of the first oil pipe joint (16) and the first guiding head (17) of the opening tool (200).

5. A repeated switch device according to claim 1, characterized in that: A closing split cylinder (27) is jointly arranged on the outer circumferential surface of the second oil pipe joint (516) and the second guiding head (517) of the closing tool (300).

6. A repeated switch device according to claim 3, characterized in that: The inner circumferential surface of the switch sliding sleeve (3) is threadedly connected to the outer circumferential surface of the limiting bolt (22), and the outer circumferential surface of the limiting bolt (22) can be in limiting lap with the inner surface of the limiting block pin (21).

7. A repeated switch device according to claim 3, characterized in that: Multiple sets of structures composed of the limiting sliding sleeve (18), the return spring (19), the limiting block (20) and the limiting block pin (21) are evenly distributed along the circumferential direction of the switch sliding sleeve (3).

8. A repeated switch device according to claim 3, characterized in that: One end of the limit block pin (21) away from the limit sliding sleeve (18) is hemispherical.

9. A repeated switch device according to claim 3, characterized in that: The width of the limit block pin (21) gradually increases from the side close to the limit sliding sleeve (18) to the side away from the limit sliding sleeve (18).

10. A repeated switch device according to claim 1, characterized in that: The end faces of the first guide head (17) and the second guide head (517) are hemispherical.

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