Hydraulic device system for increasing stress of sliding sleeve

Abstract

The invention relates to a hydraulic device system for increasing stress of a sliding sleeve. The hydraulic device system is composed of an upper connector, an upper fixator, an upper hydraulic device, a shifting device, a lower hydraulic device and a lower fixator. The upper connector is used for being connected with a coiled tubing, the upper fixing device and the lower fixing device achieve radial stretching and retracting of a slip type fixing device through hydraulic adjustment, the whole device system is fixed, the shifting device firstly achieves radial stretching and retracting of a wave type fixing device through hydraulic adjustment and is in meshed connection with a sliding sleeve, and a liquid inlet of a hydraulic rod is opened through radial movement of a piston; the hydraulic pressure continues to conduct pressurization to push the hydraulic rod to stretch out and draw back in the axial direction, the shifting device is pushed to move in the axial direction, the sliding sleeve is driven to move in the axial direction, the oil gas port is opened or closed, then the hydraulic pressure begins to relieve pressure, and the slip type fixator, the wave type fixator and the hydraulic rod return to the initial position under the action of the spring. The defects that the sliding sleeve cannot move due to small stress and the like are well overcome, and meanwhile the opening or closing problem of the sliding sleeve is solved.

Description

Technical Field

[0001] The invention relates to a hydraulic device system for increasing the force of a sliding sleeve, belonging to the field of oil and natural gas mining tools. Technical Background

[0002] In a large number of oil and gas well production operations, the wellbore needs to be drilled underground to pass through reservoirs containing target fluids such as oil and natural gas. In order to increase the production of oil and natural gas, fracturing operations are carried out at different stages in the oil well. During the operation, the sliding casing needs to be moved to control the flow and blockage of the fluid at each stage. Moreover, it is not only necessary to control the flow and blockage of the fluid at each stage in other related work of the oil well, not only in fracturing operations. However, as the horizontal wellbore continues to lengthen, it is becoming increasingly difficult to ensure that the shifting device has sufficient force to ensure the successful movement of the sliding casing.

[0003] In view of the above problems, a hydraulic device system for increasing the force on the sliding sleeve is proposed, which can move along the wellbore string underground, engage with a specific sliding sleeve, and realize the movement of the sliding sleeve by hydraulic pressure. Summary of the invention

[0004] The purpose of the present invention is to provide a hydraulic device system for increasing the force of a sliding sleeve, so as to solve the problem that as the horizontal wellbore continues to lengthen, the force of the displacement device is insufficient and the sliding sleeve is difficult to move.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is:

[0006] A hydraulic device system for increasing the force of a sliding sleeve, comprising an upper joint, an upper fixer, an upper hydraulic device, a shifting device, a lower hydraulic device and a lower fixer; the upper joint is used to connect a continuous oil pipe, and the continuous oil pipe transports the hydraulic device system for increasing the force of a sliding sleeve to a working position; the upper fixer is located below the upper joint, and acts together with the lower fixer to fix the entire device system, and the fixing method adopts hydraulic fixing. When the hydraulic oil flowing through the first hydraulic pipe fitting and the hydraulic oil of the third hydraulic pipe fitting are pressurized, the pressurized hydraulic oil pushes the first piston in the upper fixer and the lower fixer to move radially outward, and the outward-moving first piston then pushes the slip-type fixer The fixer moves radially outward and finally contacts with the pipe wall, and the upper fixer and the lower fixer work together to finally fix the entire device in the working area; the upper hydraulic device is located below the upper fixer, and when the oil and gas port needs to be closed, the first valve is opened and the second valve is closed, so that the hydraulic pressure pushes the shifting device to move axially downward, driving the sliding sleeve to move axially downward to complete the closing of the oil and gas port. After the oil and gas port is closed, the hydraulic pressure begins to release pressure, and under the action of the second spring, the inner rod of the hydraulic push rod in the upper hydraulic device returns to its initial position; the shifting device is located below the upper hydraulic device, and when the hydraulic pressure is increased, the wave-type fixer extends radially outward to complete the closing of the sliding sleeve. The movable sleeve is meshed and fixed, and when the initial position is not able to be normally meshed and fixed with the sliding sleeve, the elasticity of the second spring in the upper hydraulic device and the lower hydraulic device can be adaptively adjusted to make it normally meshed and fixed with the sliding sleeve. After the oil and gas port is opened or closed, the hydraulic pressure begins to release pressure. Since the third spring is fixedly connected to the wave-type fixer and the second hydraulic pipe fitting and is at its original length when not working, the wave-type fixer can be retreated to its original position under the action of the third spring; after retreating to its original position, it can move freely in the casing driven by the continuous oil pipe, thereby completing the subsequent opening or closing of the sliding casing; the lower hydraulic device is located at the movable sleeve. Below the positioning device, when the oil and gas port needs to be opened, the first valve is closed and the second valve is opened, so that the hydraulic pressure pushes the shifting device to move axially upward, driving the sliding sleeve to move axially upward to complete the opening of the oil and gas port. After the oil and gas port is closed, the hydraulic pressure begins to release pressure, and under the action of the third spring, the upper hydraulic device returns to its original position; the upper joint is provided with an upper joint thread and a hydraulic channel, the upper joint thread is used to connect the continuous oil pipe, and the hydraulic channel is used to connect the first hydraulic pipe fitting; the upper fixer is provided with a first hydraulic pipe fitting, a first piston slide groove, a first piston, a first spring, a slip-type fixer, a fourth spring, a radial fixing piston and an upper fixer housing;The first hydraulic pipe is used to connect the upper hydraulic pipeline and to guide the flow. One side of the first piston slide groove is provided with a thread connected to the first hydraulic pipe. The first piston is located inside the first piston slide groove and can only move radially. Under the action of hydraulic pressure, the outer slip-type fixture can be pushed to extend radially outward to fix the entire device system. After the work is completed, since the first spring is fixedly connected to the slip-type fixture and the first hydraulic pipe, and is at its original length when not working, the slip-type fixture shrinks to its initial position under the action of the first spring. The bottom of the slip fixture is also provided with a fourth spring, a radial The fixing piston is used to radially fix the slip-type fixer, and the slip-type fixer is conveniently disassembled and assembled through the first through hole provided in the upper fixer shell; the lower fixer is provided with a third hydraulic pipe fitting, a first piston slide groove, a first piston, a first spring, a slip-type fixer, a fourth spring, a radial fixing piston, a lower fixer shell and an end cover, and the lower fixer has the same working mode as the upper fixer, one end of the third hydraulic pipe fitting is threadedly connected to the outer pipe fitting of the oil pipe and one end is closed, and the end cover is used to close the lower fixer; the upper hydraulic device is provided with a hydraulic push rod outer rod, a hydraulic push rod inner rod, an outer pipe fitting of the oil pipe, an inner pipe fitting of the oil pipe When the oil and gas port needs to be closed, the first valve is opened and the second valve is closed. Under the drive of the hydraulic pressure, the outer rod and the inner rod of the hydraulic push rod slide relative to each other, pushing the displacement device to move axially downward. After the displacement is completed, the hydraulic pressure begins to release pressure. Since the second spring is at its original length when not working, the outer rod and the inner rod of the hydraulic push rod return to their initial positions under the action of the second spring. The lower hydraulic device has the same working mode as the upper hydraulic device. When the lower hydraulic device is working, the first valve is closed and the second valve is opened to complete the displacement device. The displacement device is provided with a piston slide groove with a hydraulic rod connecting device, a second piston, a second hydraulic pipe, a third spring, a second piston slide groove, a wave-type fixer, a second radial support, a fourth spring, a radial fixing piston and a displacement device housing; the piston slide groove with a hydraulic rod connecting device is threadedly connected to the inner rod of the hydraulic push rod, and the lower end is threadedly connected to the second hydraulic pipe; the second piston is located inside the piston slide groove and the second piston slide groove with the hydraulic rod connecting device, and pushes the wave-type fixer to move radially under the action of hydraulic pressure; the upper and lower ends of the second hydraulic pipe are respectively connected to the internal pipe fittings of the connecting oil pipe;The third spring is fixedly connected with the second hydraulic pipe and the wave-type fixer during installation. When the oil and gas port is opened or closed, the third spring is in a stretched state, so the wave-type fixer shrinks to the initial state under the tension of the third spring. One end of the second piston slide is threadedly connected to the second hydraulic pipe. One end of the second radial support is threadedly connected to the second hydraulic pipe and used for radial support of the wave-type fixer when it is not working. The fourth spring and the radial fixing piston are used for radial fixing of the wave-type fixer. The second through hole is opened in the housing of the displacement device to facilitate the convenient disassembly and assembly of the wave-type fixer. ;

[0007] According to claim 1, a hydraulic device system for increasing the force of the sliding sleeve is characterized in that the number of the cava-type fixtures in the upper fixture and the lower fixture is 4, and the cava-type fixtures on each fixture are equidistantly distributed on the upper fixture housing and the lower fixture housing, so the corresponding first piston grooves and first pistons are 8 each, and the first radial support members and first springs are 4 each.

[0008] According to the hydraulic device system for increasing the force on the sliding sleeve as described in claim 1, it is characterized in that the fourth spring and radial fixing piston on the bottom of the cava-type fixture in the upper fixture and the lower fixture are located in the upper and lower end surfaces of each cava-type fixture, and there are 16 of them.

[0009] According to claim 1, a hydraulic device system for increasing the force of a sliding sleeve is characterized in that each of the upper hydraulic device and the lower hydraulic device has a hydraulic push rod group consisting of 4 groups of hydraulic push rod outer rods and hydraulic push rod inner rods. In addition, the hydraulic push rod inner rods in the hydraulic rod group are arranged with valves, the upper hydraulic device is equipped with 4 first valves, and the lower hydraulic device is equipped with 4 second valves. In different working states, different valves are opened to achieve different working effects.

[0010] According to claim 1, a hydraulic device system for increasing the force of the sliding sleeve is characterized in that four of the wave-type fixers are evenly distributed on the outer shell of the displacement device, and two fourth springs and two radial fixed pistons are provided at the bottom of each wave-type fixer, so there are eight fourth springs and eight radial fixed pistons respectively.

[0011] According to claim 1, a hydraulic device system for increasing the force on the sliding sleeve is characterized in that the piston grooves with a hydraulic rod connecting device are distributed in four at the upper and lower ends of the displacement device, and an upper hydraulic inlet and a lower hydraulic inlet and a lower hydraulic inlet are opened on the side wall of the piston groove with a hydraulic rod connecting device, which are used to introduce the hydraulic pressure in the second hydraulic pipe into the upper hydraulic device and the lower hydraulic device respectively under different working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a cross-sectional schematic diagram of the device of the present invention when not working;

[0013] Figure 2 It is a cross-sectional schematic diagram of the device of the present invention when working;

[0014] Figure 3 A structural view of a fixing device on the device of the present invention;

[0015] Figure 4 It is a structural schematic diagram of the hydraulic device on the device of the present invention;

[0016] Figure 5 It is a schematic structural diagram of the shifting device of the device of the present invention.

[0017] 1-upper joint, 2-upper fixer, 3-upper hydraulic device, 4-shifting device, 5-lower hydraulic device, 6-lower fixer, 11-upper joint thread, 12-hydraulic channel, 21-first hydraulic pipe fitting, 22-first piston slide groove, 23-first piston, 24-first spring, 25-slip type fixer, 26-fourth spring, 27-radial fixed piston, 28-upper fixer housing, 29-first radial support, 31-hydraulic push rod outer rod, 32-hydraulic push rod inner rod, 33-oil pipe outer fitting, 34-oil pipe inner Pipe fitting, 35-second spring, 36-first valve, 37-upper hydraulic inlet and outlet, 41-piston slide groove with hydraulic rod connecting device, 42-second piston, 43-second hydraulic pipe fitting, 44-third spring, 45-second piston slide groove, 46-wave type fixer, 47-second radial support, 48-displacement device housing, 49-second through hole, 51-lower hydraulic inlet and outlet, 52-second valve, 61-third hydraulic pipe fitting, 62-lower fixer housing, 63-end cover, 71-sliding sleeve, 72-oil and gas port.

[0018] Specific implementation method

[0019] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described in conjunction with the accompanying drawings.

[0020] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by the terms "upper", "lower", "bottom", "inside", "outside", "end face", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0022] like Figures 1-2 As shown, the hydraulic device system for increasing the force of the sliding sleeve is composed of an upper joint 1, an upper fixer 2, an upper hydraulic device 3, a shifting device 4, a lower hydraulic device 5 and a lower fixer 6; the upper joint 1 is used to connect the continuous oil pipe; the upper fixer 2 is located below the upper joint 1, and works together with the lower fixer 6 to fix the overall device system; the upper hydraulic device 3 is located below the upper fixer 2, and when the oil and gas port 72 needs to be closed, the first valve 36 is opened and the second valve 52 is closed, so that the hydraulic pressure pushes the shifting device 4 to move axially downward, driving the sliding sleeve 71 to move axially downward, completing the closing of the oil and gas port 72. After the oil and gas port 72 is closed, under the action of the second spring 35, the upper hydraulic device 3 returns to its original position; the shifting device 4 is located below the upper hydraulic device 3, and when the hydraulic pressure is applied, the wave-type fixer 46 is radially The upper hydraulic device 3 and the lower hydraulic device 5 can be extended to complete the meshing fixation of the sliding sleeve 71, and when the initial position is unable to be normally meshed and fixed with the sliding sleeve 71, the elasticity of the second spring 35 in the upper hydraulic device 3 and the lower hydraulic device 5 can be adaptively adjusted to make it normally meshed and fixed with the sliding sleeve 71. After the oil and gas port 72 is closed, the hydraulic pressure begins to release pressure, and the wave-type fixer 46 returns to its original position under the action of the third spring 44 in the shifting device 4; the lower hydraulic device 5 is located below the shifting device 4. When the oil and gas port 72 needs to be opened, the first valve 36 is closed and the second valve 52 is opened, so that the hydraulic pressure pushes the shifting device 4 to move axially upward, driving the sliding sleeve 71 to move axially upward, completing the opening of the oil and gas port 72. After the oil and gas port 72 is closed, the hydraulic pressure begins to release pressure, and under the action of the third spring 44, the upper hydraulic device 3 returns to its original position.

[0023] like Figure 3As shown, the first hydraulic pipe 21 is used to connect the hydraulic oil entering from above and is used for diversion. One side of the first piston slide groove 22 is provided with a thread connected to the first hydraulic pipe 21. The first piston 23 is located inside the first piston slide groove 22. Under the action of hydraulic pressure, it pushes the outer cava type fixer 25 to extend radially outward, thereby fixing the entire device system. After the operation is completed, since the first spring is fixedly connected to the cava type fixer 25 and the first hydraulic pipe 21, and the first spring is at its original length when not working, it shrinks to its initial position under the action of the first spring 24. A fourth spring 26 and a radial fixing piston 27 are also provided at the bottom of the cava type fixer 25, which are used to radially fix the cava type fixer 25, and the cava type fixer 25 can be conveniently disassembled and assembled through the first through hole 201 provided in the upper fixer housing 28; the lower fixer 6 has the same working mode as the upper fixer 2.

[0024] like Figure 1 , Figure 4 As shown, one end of the third hydraulic pipe 61 is threadedly connected to one end of the oil pipe external pipe 33 and is closed, and the end cover is used to close the lower fixer 6; the upper hydraulic device 3 is provided with a hydraulic push rod outer rod 31, a hydraulic push rod inner rod 32, an oil pipe external pipe 33, an oil pipe internal pipe 34, a second spring 35 and a first valve 36; when it is necessary to open the oil and gas port 72, the first valve 36 is opened and the second valve 52 is closed, and under the drive of the hydraulic pressure, the hydraulic push rod outer rod 31 and the hydraulic push rod inner rod 32 slide relative to each other, pushing the displacement device 4 to move axially downward, and after the displacement is completed, the hydraulic pressure begins to release pressure, and under the action of the second spring 35, the hydraulic push rod outer rod 31 and the hydraulic push rod inner rod 32 return to the initial position; the lower hydraulic device 5 has the same working mode as the upper hydraulic device 3. When the lower hydraulic device 5 is working, the first valve 36 is closed and the second valve 52 is opened to complete the pushing of the displacement device 4.

[0025] like Figure 5As shown, the piston slide groove 41 with a hydraulic rod connecting device is threadedly connected to the hydraulic push rod inner rod 32, and the lower end is threadedly connected to the second hydraulic pipe 43; the second piston 42 is located inside the piston slide groove 41 with a hydraulic rod connecting device and the second piston slide groove 45, and under the action of hydraulic pressure, pushes the wave-type fixer 46 to move radially; the upper and lower ends of the second hydraulic pipe 43 are respectively connected to the internal pipe 34 of the connecting oil pipe; the third spring 44 is fixedly connected to the second hydraulic pipe 43 and the wave-type fixer 46 during installation, and when the oil and gas port 72 is opened or closed, The third spring 44 is in a stretched state, so the wave-type fixer 46 contracts to the initial state under the pulling force of the third spring 44, one end of the second piston slide groove 45 is threadedly connected to the second hydraulic pipe 43, one end of the second radial support member 47 is threadedly connected to the second hydraulic pipe 43, and is used for radial support of the wave-type fixer 46 when it is not working. The fourth spring 26 and the radial fixing piston 27 are used for radial fixation of the wave-type fixer 46, and by opening a second through hole 49 in the displacement device housing 48, the wave-type fixer 46 can be easily disassembled and assembled.

Claims

1. A hydraulic device system for increasing the force on a sliding sleeve, comprising an upper joint (1), an upper fixer (2), an upper hydraulic device (3), a shifting device (4), a lower hydraulic device (5) and a lower fixer (6); the upper joint (1) is used to connect a continuous oil pipe; the upper fixer (2) is located below the upper joint (1) and acts together with the lower fixer (6) to fix the entire device system; the upper hydraulic device (3) is located below the upper fixer (2); when it is necessary to close the oil and gas port (72), the first valve (36) is opened and the second valve (52) is closed, so that the hydraulic pressure pushes the shifting device (4) to move the oil and gas port (72) to the lower portion of the hydraulic pressure port (72). The positioning device (4) moves axially downward, driving the sliding sleeve (71) to move axially downward, completing the closing of the oil and gas port (72). After the oil and gas port (72) is closed, under the action of the second spring (35), the upper hydraulic device (3) returns to its original position; the displacement device (4) is located below the upper hydraulic device (3), and when hydraulic pressure is applied, the wave-type fixer (46) radially extends to complete the meshing fixation of the sliding sleeve (71), and when the initial position fails to mesh with the sliding sleeve (71) normally, the second spring (35) in the upper hydraulic device (3) and the lower hydraulic device (5) can also be used to fix the oil and gas port (72) to the original position. The elasticity is adaptively adjusted so that the sliding sleeve (71) is normally engaged and fixed. When the oil and gas port (72) is closed, the hydraulic pressure begins to release pressure, and the wave-type fixer (46) is returned to its original position under the action of the third spring (44) in the displacement device (4). The lower hydraulic device (5) is located below the displacement device (4). When the oil and gas port (72) needs to be opened, the first valve (36) is closed and the second valve (52) is opened, so that the hydraulic pressure pushes the displacement device (4) to move axially upward, driving the sliding sleeve (71) to move axially upward, completing the opening of the oil and gas port (72). The oil and gas port (72) is opened. 72) is closed, the hydraulic pressure begins to be released, and under the action of the third spring (44), the upper hydraulic device (3) returns to its original position; the upper joint (1) is provided with an upper joint thread (11) and a hydraulic channel (12), the upper joint thread (11) is used to connect the continuous oil pipe, and the hydraulic channel (12) is used to connect the first hydraulic pipe (21); the upper fixer (2) is provided with a first hydraulic pipe (21), a first piston slide groove (22), a first piston (23), a first spring (24), a slip-type fixer (25), a fourth spring (26), a radial fixing piston (27) and an upper fixer housing (28);The first hydraulic pipe (21) is used to connect the hydraulic oil entering from above and to guide the flow. One side of the first piston slide groove (22) is provided with a thread connected to the first hydraulic pipe (21). The first piston (23) is located inside the first piston slide groove (22) and pushes the outer slip type fixer (25) to extend radially outward under the action of hydraulic pressure, thereby fixing the entire device system. After the operation is completed, since the first spring is fixedly connected to the slip type fixer (25) and the first hydraulic pipe (21), and the first spring is at its original length when not working, it shrinks to its initial position under the action of the first spring (24). The bottom of the slip type fixer (25) is also provided with a fourth spring (26). The radial fixing piston (27) is used to radially fix the slip type fixer (25), and the slip type fixer (25) is conveniently disassembled and assembled through the first through hole (201) provided in the upper fixer housing (28); the lower fixer (6) is provided with a third hydraulic pipe (61), a first piston slide groove (22), a first piston (23), a first spring (24), a slip type fixer (25), a fourth spring (26), a radial fixing piston (27), a lower fixer housing (62) and an end cover (63); the lower fixer (6) has the same function as the upper fixer (2); one end of the third hydraulic pipe (61) is threadedly connected to one end of the oil pipe external pipe (33) for sealing; the end cover is used to fix the lower fixer The upper hydraulic device (3) is provided with a hydraulic push rod outer rod (31), a hydraulic push rod inner rod (32), an oil pipe outer pipe fitting (33), an oil pipe inner pipe fitting (34), a second spring (35) and a first valve (36); when the oil and gas port (72) needs to be closed, the first valve (36) is opened and the second valve (52) is closed, and under the drive of the hydraulic pressure, the hydraulic push rod outer rod (31) and the hydraulic push rod inner rod (32) slide relative to each other, pushing the shifting device (4) to move axially downward, and after the shifting is completed, the hydraulic pressure begins to release pressure, and under the action of the second spring (35), the hydraulic push rod outer rod (31) and the hydraulic push rod inner rod (32) return to their initial positions; the lower hydraulic device (5) and the The upper hydraulic device (3) has the same working mode. When the lower hydraulic device (5) is working, the first valve (36) is closed and the second valve (52) is opened to complete the pushing of the displacement device (4); the displacement device (4) is provided with a piston slide groove (41) with a hydraulic rod connecting device, a second piston (42), a second hydraulic pipe (43), a third spring (44), a second piston slide groove (45), a wave-type fixer (46), a second radial support member (47), a fourth spring (26), a radial fixed piston (27) and a displacement device housing (48); the piston slide groove (41) with a hydraulic rod connecting device is threadedly connected to the hydraulic push rod inner rod (32), and the lower end is threadedly connected to the second hydraulic pipe (43);The second piston (42) is located inside the piston slide groove (41) and the second piston slide groove (45) with the hydraulic rod connecting device, and pushes the wave-type fixer (46) to move radially under the action of hydraulic pressure; the upper and lower ends of the second hydraulic pipe (43) are respectively connected to the internal pipe (34) of the connecting oil pipe; the third spring (44) is fixedly connected to the second hydraulic pipe (43) and the wave-type fixer (46) during installation, and when the oil and gas port (72) is opened or closed, the third spring (44) is in a stretched state, so when the third spring (44) is in a stretched state, the third spring (44) is in a stretched state. Under the action of the pulling force, the wave-type fixer (46) shrinks to the initial state, one end of the second piston slide groove (45) is threadedly connected to the second hydraulic pipe (43), one end of the second radial support member (47) is threadedly connected to the second hydraulic pipe (43) and is used for radial support of the wave-type fixer (46) when it is not in operation, the fourth spring (26) and the radial fixing piston (27) are used for radial fixing of the wave-type fixer (46), and the second through hole (49) is opened on the displacement device housing (48), so as to facilitate the convenient disassembly and assembly of the wave-type fixer (46). ; 2. A hydraulic device system for increasing the force on a sliding sleeve according to claim 1, characterized in that: The cava-type fixtures in the upper fixture (2) and the lower fixture (6) are each provided with four cava-type fixtures, which are equidistantly distributed circumferentially on the upper fixture housing (28) and the lower fixture housing (62), so that the corresponding first piston grooves (22) and first pistons (23) are each provided with eight, and the corresponding first radial supports (29) and first springs (24) are each provided with four.

3. A hydraulic device system for increasing the force on a sliding sleeve according to claim 1, characterized in that: The fourth springs (26) and radial fixing pistons (27) on the bottom of the slip-type fixer in the upper fixer (2) and the lower fixer (6) are located in the upper and lower end surfaces of each slip-type fixer, and there are 16 of them respectively.

4. A hydraulic device system for increasing the force on a sliding sleeve according to claim 1, characterized in that: Each of the upper hydraulic device (3) and the lower hydraulic device (5) has a hydraulic push rod group consisting of four groups of hydraulic push rod outer rods (31) and hydraulic push rod inner rods (32); and the hydraulic push rod inner rods (32) in the hydraulic rod group are arranged with valves, the upper hydraulic device (3) is equipped with four first valves (36), and the lower hydraulic device (5) is equipped with four second valves (52). Under different working conditions, different valves are opened to achieve different working effects.

5. A hydraulic device system for increasing the force on a sliding sleeve according to claim 1, characterized in that: Four wave-type fixers (46) are evenly spaced on the displacement device housing (48), and two fourth springs (26) and two radial fixed pistons (27) are provided at the bottom of each wave-type fixer (46), so there are eight fourth springs (26) and eight radial fixed pistons (27).

6. A hydraulic device system for increasing the force on a sliding sleeve according to claim 1, characterized in that: The piston slide grooves (41) with hydraulic rod connecting devices are distributed at four ends of the upper and lower ends of the displacement device (4), and an upper hydraulic inlet and outlet (37) and a lower hydraulic inlet and outlet (51) are opened on the side wall of the piston slide groove (41) with hydraulic rod connecting devices, which are used to introduce the hydraulic pressure in the second hydraulic pipe (43) into the upper hydraulic device (3) and the lower hydraulic device (5) respectively under different working conditions.

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