Fracturing equipment

Abstract

The invention provides a fracturing device. The fracturing equipment comprises a tubular assembly. The fracturing main body comprises two packers, a differential pressure sliding sleeve and a ball injection sliding sleeve which are communicated with one another, and the differential pressure sliding sleeve and the ball injection sliding sleeve are located between the two packers; the liquid supply device communicates with the fracturing body through a tubular assembly so as to be used for supplying liquid into the fracturing body, the tubular assembly is provided with a ball injection opening communicating with an inner cavity of the tubular assembly, and the ball injection sliding sleeve is located on the side, away from the liquid supply device, of the differential pressure sliding sleeve; the plugging throwing ball enters the inner cavity through the ball throwing opening, the plugging throwing ball is driven by liquid supplied by the liquid supply device to move into the fracturing main body, a plugging matching seat is arranged in the ball throwing sliding sleeve, the plugging matching seat is provided with a through hole, and when the plugging throwing ball moves to abut against the plugging matching seat, the plugging throwing ball plugs the through hole; wherein the plugging throwing ball is made of a dissolvable material. The problem that in the prior art, the fracturing effect of fracturing equipment on long drill holes is poor is effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of fracturing, and in particular to a fracturing device. Background Art

[0002] At present, hydraulic fracturing technology is one of the most commonly used coal reservoir transformation technologies. This technology uses a high-pressure pump to inject water (or liquid carrying proppant) into the coal rock drill hole, so that the liquid pressure in the hole increases until the coal rock layer breaks and produces coal rock cracks that continue to extend and expand, so as to form a rich fracture network in the coal rock layer, thereby achieving the purpose of increasing gas extraction and transforming the strength of weakened coal rock layer.

[0003] In the prior art, commonly used staged fracturing processes include the drag-type double-packer staged fracturing process, in which the fracturing equipment used must first be sent to the bottom of the coal rock borehole, and then the tool string is dragged in the borehole to complete stage-by-stage fracturing.

[0004] However, in the process of long borehole staged fracturing, due to the long borehole length, the fracturing equipment is very likely to get stuck during the insertion process (i.e., the fracturing equipment cannot be inserted to the bottom of the borehole). After the jam occurs, the solution in the prior art is to perform a hole flushing operation on the coal and rock borehole to clear the jammed position. However, in fact, the hole flushing operation is not only inefficient, but also ineffective. If the jamming problem is not solved, the borehole section after the jammed position cannot be fractured, which seriously affects the actual fracturing effect. Summary of the invention

[0005] The main purpose of the present invention is to provide a fracturing device to solve the problem that the fracturing effect of the fracturing device in the prior art on a long borehole is poor.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a fracturing equipment, including: a tubular component; a fracturing body, including a packer, a pressure differential sleeve and a ball-throwing sleeve that are interconnected, there are two packers, and the pressure differential sleeve and the ball-throwing sleeve are located between the two packers; a liquid supply device, the liquid supply device is connected to the fracturing body through the tubular component to supply liquid into the fracturing body, the tubular component has a ball-throwing port connected to its inner cavity, and the ball-throwing sleeve is located on the side of the pressure differential sleeve away from the liquid supply device; a blocking ball, which enters the inner cavity through the ball-throwing port, and the blocking ball moves into the fracturing body driven by the liquid supplied by the liquid supply device, a blocking fitting seat is provided in the ball-throwing sleeve, and the blocking fitting seat has a through hole, and when the blocking ball moves to abut against the blocking fitting seat, the blocking ball blocks the through hole; wherein the blocking ball is made of a soluble material.

[0007] Furthermore, the differential pressure sleeve has a drainage working pressure M1, and the isolation device has a seating pressure M2. When the sealing ball is dropped into the inner cavity and the liquid supplied by the liquid supply device drives the sealing ball to move to abut against the sealing seat, the liquid supply pressure M3 of the liquid supply device and the drainage working pressure M1 and the seating pressure M2 satisfy: M3<M2<M1.

[0008] Furthermore, the tubular assembly includes: a tubular structure, one end of which is connected to the fracturing body; a ball-dropping device having a ball-dropping port, which is arranged on the other end of the tubular structure and connected to the tubular structure.

[0009] Furthermore, the fracturing body also includes: a connecting pipe fitting, which is arranged between a packer and a pressure differential sleeve to connect the packer and the pressure differential sleeve; and / or, the connecting pipe fitting is arranged between the pressure differential sleeve and the ball pitching sleeve to connect the pressure differential sleeve and the ball pitching sleeve; and / or, the connecting pipe fitting is arranged between the ball pitching sleeve and another packer to connect the packer and the ball pitching sleeve.

[0010] Furthermore, the fracturing equipment also includes: a driving device having a first driving part drivingly connected to the tubular assembly, the first driving part being used to drive the tubular assembly to drive the fracturing body to move along the extension direction of the borehole.

[0011] Furthermore, among the two packers, the packer arranged close to the fluid supply device relative to the pressure differential sleeve is the front packer, and the fracturing equipment also includes: a release structure, which is arranged between the tubular component and the front packer, and the tubular component is connected to the front packer through the release structure; wherein the driving device also has a second driving part which is drivingly connected to the tubular component, and the second driving part is used to drive the tubular component to rotate, and during the process of the second driving part driving the tubular component to rotate, the release structure is separated from the front packer.

[0012] Furthermore, among the two packers, the packer arranged away from the fluid supply device relative to the differential pressure sleeve is the rear packer, and the fracturing equipment also includes: a guide shoe structure arranged on the rear packer, and the guide shoe structure is located on the side of the rear packer away from the differential pressure sleeve.

[0013] Furthermore, the shoe guide structure is columnar, and the end face of the shoe guide structure away from the rear packer is an arc-shaped face; wherein, the diameter R1 of the shoe guide structure, the diameter R2 of the rear packer in a non-sealed state, and the diameter R3 of the rear packer in a seated state satisfy: R2<R1<R3.

[0014] Furthermore, the liquid supply device includes: a liquid storage structure for storing liquid; a liquid supply pipe, one end of which is connected to the liquid storage structure, and the other end of which is connected to an end of the tubular component away from the fracturing body; and a pump body structure, which is arranged on the liquid supply pipe and is used to drive the liquid to flow.

[0015] Furthermore, the liquid supplied by the liquid supply device includes a first liquid and a second liquid, the first liquid is a fracturing fluid, and the second liquid is a dissolving liquid, and the dissolving liquid is used to increase the dissolution rate of the plugging ball.

[0016] According to the technical solution of the present invention, the fracturing equipment includes a tubular component, a fracturing body, a fluid supply device and a plugging ball. The fracturing body includes a packer, a pressure differential sleeve and a ball-dropping sleeve that are interconnected. There are two packers, and the pressure differential sleeve and the ball-dropping sleeve are located between the two packers. The fluid supply device is connected to the fracturing body through the tubular component to supply liquid into the fracturing body. The tubular component has a ball-dropping port connected to its inner cavity, and the ball-dropping sleeve is located on the side of the pressure differential sleeve away from the fluid supply device. The plugging ball enters the inner cavity through the ball-dropping port, and the plugging ball moves into the fracturing body driven by the liquid supplied by the fluid supply device. A plugging matching seat is provided in the ball-dropping sleeve, and the plugging matching seat has a through hole. When the plugging ball moves to abut against the plugging matching seat, the plugging ball blocks the through hole. Wherein, the plugging ball is made of a soluble material. In this way, during the process of the fracturing body extending into the coal seam borehole, if the packer encounters an obstacle and the fracturing body cannot continue to extend, the sealing ball can be dropped into the inner cavity of the tubular component through the ball injection port, and the sealing ball moves under the drive of the liquid and seals the through hole of the sealing matching seat. At this time, even if the liquid supply pressure is increased, the high-pressure liquid cannot flow to the packer near the bottom of the coal seam borehole due to the sealing effect of the sealing ball, that is, the packer near the bottom of the coal seam borehole is always in an unsealed state (there is a gap between the packer and the borehole wall), so as to ensure high pressure The liquid can flow to the area between the obstruction position and the bottom of the coal seam borehole to perform fracturing on this part of the area. After fracturing on this part of the area, the sealing ball will dissolve after a period of time. At this time, the staff can drag the fracturing body to perform segmented fracturing on the area between the obstruction position and the coal seam borehole mouth. That is, even if the fracturing body of the fracturing equipment in the present application cannot extend to the bottom of the borehole, all the boreholes can be fractured, which greatly improves the fracturing effect of the borehole, thereby solving the problem that the fracturing effect of the fracturing equipment in the prior art on long boreholes is poor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 It shows a schematic diagram of the overall structure in which both packers of the embodiment of the fracturing equipment according to the present invention are in an unsealed state;

[0019] Figure 2 Shows Figure 1A schematic diagram of the overall structure of the fracturing equipment in the fracturing state when no ball is thrown;

[0020] Figure 3 Shows Figure 1 Schematic diagram of the overall structure of the fracturing equipment in the fracturing state after the ball is thrown.

[0021] The above drawings include the following reference numerals:

[0022] 10. Tubular component; 11. Tubular structure; 12. Ball throwing device;

[0023] 20. Fracturing body; 21. Packer; 211. Front packer; 212. Rear packer; 22. Pressure differential sleeve; 23. Ball-casting sleeve; 231. Blocking seat; 2311. Through hole; 24. Connecting pipe fitting;

[0024] 30. Liquid supply device; 31. Liquid storage structure; 32. Liquid supply pipe; 33. Pump body structure;

[0025] 40. Block the pitch;

[0026] 50. driving device; 51. first driving unit; 52. second driving unit;

[0027] 60. Throw-away structure;

[0028] 70. Shoe guide structure. DETAILED DESCRIPTION

[0029] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0030] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0031] In the present invention, unless otherwise specified, the directional words used, such as "up" and "down", usually refer to the directions shown in the drawings, or to the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention.

[0032] In order to solve the problem that the fracturing equipment in the prior art has a poor fracturing effect on long boreholes, the present application provides a fracturing equipment.

[0033] like Figures 1 to 3As shown, the present invention provides a fracturing device including a tubular component 10, a fracturing body 20, a fluid supply device 30 and a plugging ball 40. The fracturing body 20 includes a packer 21, a differential pressure sleeve 22 and a plugging ball sleeve 23 that are interconnected. There are two packers 21, and the differential pressure sleeve 22 and the plugging ball sleeve 23 are located between the two packers 21. The fluid supply device 30 is connected to the fracturing body 20 through the tubular component 10 to supply liquid into the fracturing body 20. The tubular component 10 has a ball port connected to its inner cavity, and the plugging ball sleeve 23 is located on the side of the differential pressure sleeve 22 away from the fluid supply device 30. The plugging ball 40 enters the inner cavity through the ball injection port, and moves into the fracturing body 20 driven by the liquid supplied by the liquid supply device 30. A plugging seat 231 is provided in the ball injection sleeve 23, and the plugging seat 231 has a through hole 2311. When the plugging ball 40 moves to abut against the plugging seat 231, the plugging ball 40 blocks the through hole 2311. The plugging ball 40 is made of a soluble material.

[0034] The technical solution of this embodiment is applied, and the fracturing equipment includes a tubular component 10, a fracturing body 20, a liquid supply device 30 and a plugging ball 40. The fracturing body 20 includes a packer 21, a differential pressure sleeve 22 and a plugging ball sleeve 23 that are interconnected. There are two packers 21, and the differential pressure sleeve 22 and the plugging ball sleeve 23 are located between the two packers 21. The liquid supply device 30 is connected to the fracturing body 20 through the tubular component 10 to supply liquid into the fracturing body 20. The tubular component 10 has a ball port connected to its inner cavity, and the plugging ball sleeve 23 is located on the side of the differential pressure sleeve 22 away from the liquid supply device 30. The plugging ball 40 enters the inner cavity through the ball injection port, and moves into the fracturing body 20 driven by the liquid supplied by the liquid supply device 30. A plugging seat 231 is provided in the ball injection sleeve 23, and the plugging seat 231 has a through hole 2311. When the plugging ball 40 moves to abut against the plugging seat 231, the plugging ball 40 blocks the through hole 2311. The plugging ball 40 is made of a soluble material. In this way, when the fracturing body 20 is inserted into the coal seam borehole, if the packer 21 encounters an obstacle and the fracturing body 20 cannot be further inserted, the plugging ball 40 can be dropped into the inner cavity of the tubular component 10 through the ball injection port, and the plugging ball 40 moves under the drive of the liquid and blocks the through hole 2311 of the plugging seat 231. At this time, even if the liquid supply pressure is increased, the high-pressure liquid cannot flow to the packer 21 near the bottom of the coal seam borehole under the plugging effect of the plugging ball 40, that is, the packer 21 near the bottom of the coal seam borehole is always in an unsealed state (the packer 21 is in a closed state with respect to the borehole wall). There is a gap between the two ends of the coal seam borehole and the blocking position to ensure that the high-pressure liquid can flow to the area between the obstruction position and the bottom of the coal seam borehole to perform fracturing on this part of the area. After fracturing on this part of the area, the sealing ball 40 will dissolve after a period of time. At this time, the staff can drag the fracturing body 20 to perform segmented fracturing on the area between the obstruction position and the coal seam borehole orifice. That is, even if the fracturing body 20 of the fracturing equipment in this embodiment cannot extend to the bottom of the borehole, all the boreholes can be fractured, which greatly improves the fracturing effect of the borehole, thereby solving the problem that the fracturing effect of the fracturing equipment in the prior art on long boreholes is poor.

[0035] Specifically, in this embodiment, the fracturing equipment does not perform ball dropping (blocking ball dropping 40), and it can also operate in a normal state, that is, the high-pressure water can normally cause the two packers 21 to be seated, and fracturing is performed in a conventional staged fracturing manner.

[0036] In this embodiment, the tubular component 10 is hollow inside and can pass high-pressure water, and the internal pore diameter is larger than the diameter of the blocking ball 40 .

[0037] In this embodiment, the plugging ball 40 is made of graphene-reinforced aluminum-based composite material, which is prepared by using graphene and silicon carbide ceramic particles to reinforce aluminum alloy and combining it with a powder metallurgy method. It has the characteristics of high strength, high hardness and rapid self-dissolution in a salt water environment. The yield strength reaches 469MPa and the surface hardness reaches 170HBW. When using clean water fracturing, the plugging ball 40 does not dissolve.

[0038] like Figure 1 As shown, the differential pressure sleeve 22 has a discharge working pressure M1, and the packer 21 has a seat sealing pressure M2. When the plugging ball 40 is put into the inner cavity and the liquid supplied by the liquid supply device 30 drives the plugging ball 40 to move to abut against the plugging matching seat 231, the liquid supply pressure M3 of the liquid supply device 30 and the discharge working pressure M1 and the seat sealing pressure M2 satisfy: M3<M2<M1. In this way, when the liquid supply device 30 supplies liquid at the liquid supply pressure M3, the liquid pressure will not trigger the packer 21 and the differential pressure sleeve 22, so as to ensure that the plugging ball 40 can move to abut against the plugging matching seat 231.

[0039] It should be noted that the structures of the packer 21 and the differential pressure sleeve 22 are not described in detail here, and their structures are relatively conventional.

[0040] like Figure 1 As shown, the tubular assembly 10 includes a tubular structure 11 and a ball throwing device 12. One end of the tubular structure 11 is connected to the fracturing body 20. The ball throwing device 12 has a ball throwing port, and the ball throwing device 12 is arranged on the other end of the tubular structure 11 and is connected to the tubular structure 11. In this way, the ball throwing device 12 can provide a ball throwing port for the tubular assembly 10 to achieve a ball throwing operation.

[0041] Specifically, the structure of the ball throwing device 12 is relatively conventional and will not be described in detail here.

[0042] Optionally, the fracturing body 20 further includes a connecting pipe 24. The connecting pipe 24 is arranged between a packer 21 and a differential pressure sleeve 22 to connect the packer 21 and the differential pressure sleeve 22; and / or, the connecting pipe 24 is arranged between the differential pressure sleeve 22 and the pitching sleeve 23 to connect the differential pressure sleeve 22 and the pitching sleeve 23; and / or, the connecting pipe 24 is arranged between the pitching sleeve 23 and another packer 21 to connect the packer 21 and the pitching sleeve 23. In this way, the connecting pipe 24 can adjust the distance between the two packers 21 to adjust the size of the fracturing section of the fracturing equipment while realizing the connection between the packer 21, the differential pressure sleeve 22 and the pitching sleeve 23.

[0043] like Figure 1As shown, the fracturing equipment further includes a driving device 50. The driving device 50 has a first driving part 51 drivingly connected to the tubular assembly 10, and the first driving part 51 is used to drive the tubular assembly 10 to drive the fracturing body 20 to move along the extension direction of the borehole. In this way, when the staff is performing fracturing construction, the driving device 50 can drive the tubular assembly 10 to drive the fracturing body 20 to move, so as to achieve the extension and dragging operation of the fracturing body 20.

[0044] In this embodiment, the driving device 50 is a drilling machine.

[0045] like Figure 1 As shown, among the two packers 21, the packer 21 arranged near the fluid supply device 30 relative to the differential pressure sleeve 22 is the front packer 211, and the fracturing equipment also includes a release structure 60. The release structure 60 is arranged between the tubular component 10 and the front packer 211, and the tubular component 10 is connected to the front packer 211 through the release structure 60. Among them, the driving device 50 also has a second driving part 52 drivingly connected to the tubular component 10, and the second driving part 52 is used to drive the tubular component 10 to rotate. In the process of the second driving part 52 driving the tubular component 10 to rotate, the release structure 60 is separated from the front packer 211. In this way, if an unexpected situation such as a hole collapse occurs during the fracturing construction process, which causes the fracturing body 20 to be unable to be dragged normally, the second driving part 52 of the driving device 50 can be used to perform positive rotation, and the tubular component 10 can be separated from the fracturing body 20 through the release structure 60, so as to discard the fracturing body 20 and realize the recovery of the tubular component 10.

[0046] Specifically, the first driving part 51 may be an integral driving structure of the drilling rig, that is, the drilling rig moves as a whole to drive the tubular component 10 to move along the extension direction of the drilling hole.

[0047] Specifically, the second driving part 52 may be a rotation driving structure of a drilling rig to drive the tubular component 10 to rotate.

[0048] like Figure 1 As shown, among the two packers 21, the packer 21 arranged away from the fluid supply device 30 relative to the differential pressure sleeve 22 is the rear packer 212, and the fracturing equipment further includes a guide shoe structure 70. The guide shoe structure 70 is arranged on the rear packer 212, and the guide shoe structure 70 is located on the side of the rear packer 212 away from the differential pressure sleeve 22. In this way, the guide shoe structure 70 can protect the rear packer 212 during the extension process of the fracturing body 20, that is, the impurities on the drilling path are broken through by the guide shoe structure 70.

[0049] like Figure 1As shown, the guide shoe structure 70 is columnar, and the end surface of the guide shoe structure 70 away from the rear packer 212 is an arc surface. Among them, the diameter R1 of the guide shoe structure 70, the diameter R2 of the rear packer 212 in a non-sealed state, and the diameter R3 of the rear packer 212 in a seated state satisfy: R2<R1<R3. In this way, the above setting can improve the breaking effect of the guide shoe structure 70 on the one hand, that is, impurities can move along the arc surface; on the other hand, it improves the protection reliability of the guide shoe structure 70 on the rear packer 212.

[0050] like Figure 1 As shown, the liquid supply device 30 includes a liquid storage structure 31, a liquid supply pipe 32 and a pump structure 33. The liquid storage structure 31 is used to store liquid. One end of the liquid supply pipe 32 is connected to the liquid storage structure 31, and the other end of the liquid supply pipe 32 is connected to the end of the tubular component 10 away from the fracturing body 20. The pump structure 33 is arranged on the liquid supply pipe 32, and the pump structure 33 is used to drive the liquid to flow. In this way, the above arrangement makes the overall structure of the liquid supply device 30 simpler on the one hand; on the other hand, when the liquid supply device 30 provides high-pressure water for fracturing construction, the staff can adjust the fracturing water pressure by adjusting the power of the pump structure 33.

[0051] In this embodiment, the pump structure 33 is a water pump.

[0052] In this embodiment, the liquid supply pipe 32 is a high-pressure rubber hose, and its rated working pressure needs to be greater than the maximum water pressure during the fracturing process.

[0053] like Figure 1 As shown, the liquid supplied by the liquid supply device 30 includes a first liquid and a second liquid, the first liquid is a fracturing fluid, and the second liquid is a dissolving liquid, and the dissolving liquid is used to increase the dissolving rate of the plugging ball 40. In this way, when the fracturing fluid is supplied, the fracturing fluid can realize the normal fracturing function of the fracturing equipment, and when the dissolving liquid is supplied, the dissolving rate of the plugging ball 40 can be accelerated to dissolve the plugging ball 40 as soon as possible, restore the normal staged fracturing function of the fracturing equipment, and improve the fracturing speed of the fracturing equipment.

[0054] Optionally, the fracturing fluid is water.

[0055] Optionally, the dissolving liquid is a potassium chloride solution, that is, when the liquid supply device 30 supplies potassium chloride solution, it can dissolve the plugging balls 40 as quickly as possible (about 20 minutes), thereby facilitating the staff to perform conventional staged fracturing on the remaining boreholes.

[0056] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0057] The fracturing equipment includes a tubular component, a fracturing body, a fluid supply device and a plugging ball. The fracturing body includes a packer, a pressure differential sleeve and a ball sleeve that are interconnected. There are two packers, and the pressure differential sleeve and the ball sleeve are located between the two packers. The fluid supply device is connected to the fracturing body through the tubular component to supply liquid into the fracturing body. The tubular component has a ball port connected to its inner cavity, and the ball sleeve is located on the side of the pressure differential sleeve away from the fluid supply device. The plugging ball enters the inner cavity through the ball port, and the plugging ball moves into the fracturing body driven by the liquid supplied by the fluid supply device. A plugging seat is provided in the ball sleeve, and the plugging seat has a through hole. When the plugging ball moves to abut against the plugging seat, the plugging ball blocks the through hole. Among them, the plugging ball is made of soluble material. In this way, during the process of the fracturing body extending into the coal seam borehole, if the packer encounters an obstacle and the fracturing body cannot continue to extend, the sealing ball can be dropped into the inner cavity of the tubular component through the ball injection port, and the sealing ball moves under the drive of the liquid and seals the through hole of the sealing matching seat. At this time, even if the liquid supply pressure is increased, the high-pressure liquid cannot flow to the packer near the bottom of the coal seam borehole due to the sealing effect of the sealing ball, that is, the packer near the bottom of the coal seam borehole is always in an unsealed state (there is a gap between the packer and the borehole wall), so as to ensure high pressure The liquid can flow to the area between the obstruction position and the bottom of the coal seam borehole to perform fracturing on this part of the area. After fracturing on this part of the area, the sealing ball will dissolve after a period of time. At this time, the staff can drag the fracturing body to perform segmented fracturing on the area between the obstruction position and the coal seam borehole mouth. That is, even if the fracturing body of the fracturing equipment in the present application cannot extend to the bottom of the borehole, all the boreholes can be fractured, which greatly improves the fracturing effect of the borehole, thereby solving the problem that the fracturing effect of the fracturing equipment in the prior art on long boreholes is poor.

[0058] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0059] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0060] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fracturing device, characterized in that: include: Tubular component (10); A fracturing body (20) comprises a packer (21), a differential pressure sleeve (22) and a ball-dropping sleeve (23) which are interconnected, wherein there are two packers (21), and the differential pressure sleeve (22) and the ball-dropping sleeve (23) are located between the two packers (21); a liquid supply device (30), the liquid supply device (30) being connected to the fracturing body (20) through the tubular component (10) so as to supply liquid into the fracturing body (20), the tubular component (10) having a ball injection port connected to its inner cavity, the ball injection sleeve (23) being located on a side of the differential pressure sleeve (22) away from the liquid supply device (30); A plugging ball (40) enters the inner cavity through the ball-dropping opening. The plugging ball (40) moves into the fracturing body (20) driven by the liquid supplied by the liquid supply device (30). A plugging matching seat (231) is provided in the ball-dropping sleeve (23). The plugging matching seat (231) has a through hole (2311). When the plugging ball (40) moves to abut against the plugging matching seat (231), the plugging ball (40) blocks the through hole (2311); Wherein, the blocking ball (40) is made of a dissolvable material.

2. The fracturing equipment according to claim 1, characterized in that: The differential pressure sleeve (22) has a liquid discharge working pressure M1, and the isolation device (21) has a sealing pressure M2. When the sealing ball (40) is dropped into the inner cavity and the liquid supplied by the liquid supply device (30) drives the sealing ball (40) to move to abut against the sealing seat (231), the liquid supply pressure M3 of the liquid supply device (30) satisfies the liquid discharge working pressure M1 and the sealing pressure M2: M3<M2<M1.

3. The fracturing equipment according to claim 1, characterized in that: The tubular component (10) comprises: A tubular structure (11), one end of the tubular structure (11) being in communication with the fracturing body (20); A ball throwing device (12) is provided with the ball throwing port. The ball throwing device (12) is arranged on the other end of the tubular structure (11) and is connected to the tubular structure (11).

4. The fracturing equipment according to claim 1, characterized in that: The fracturing body (20) further comprises: a connecting pipe (24), the connecting pipe (24) being arranged between a packer (21) and the pressure differential sleeve (22) so as to connect the packer (21) and the pressure differential sleeve (22); and / or, The connecting pipe (24) is arranged between the pressure difference sliding sleeve (22) and the ball pitching sliding sleeve (23) to connect the pressure difference sliding sleeve (22) and the ball pitching sliding sleeve (23); and / or, The connecting pipe (24) is arranged between the ball-dropping sliding sleeve (23) and another packer (21) to connect the packer (21) and the ball-dropping sliding sleeve (23).

5. The fracturing equipment according to claim 1, characterized in that: The fracturing equipment also includes: The driving device (50) comprises a first driving part (51) drivingly connected to the tubular component (10), wherein the first driving part (51) is used to drive the tubular component (10) to drive the fracturing body (20) to move along the extension direction of the drilling hole.

6. The fracturing equipment according to claim 5, characterized in that: Among the two packers (21), the packer (21) arranged close to the fluid supply device (30) relative to the differential pressure sleeve (22) is a front packer (211), and the fracturing equipment further comprises: a release structure (60) disposed between the tubular component (10) and the front packer (211), wherein the tubular component (10) is connected to the front packer (211) via the release structure (60); The driving device (50) further comprises a second driving part (52) drivingly connected to the tubular component (10), wherein the second driving part (52) is used to drive the tubular component (10) to rotate, and when the second driving part (52) drives the tubular component (10) to rotate, the release structure (60) is separated from the front packer (211).

7. The fracturing equipment according to claim 6, characterized in that: Among the two packers (21), the packer (21) arranged away from the fluid supply device (30) relative to the differential pressure sleeve (22) is a rear packer (212), and the fracturing equipment further comprises: A guide shoe structure (70) is arranged on the rear packer (212), and the guide shoe structure (70) is located on a side of the rear packer (212) away from the differential pressure sliding sleeve (22).

8. The fracturing equipment according to claim 7, characterized in that: The guide shoe structure (70) is columnar, and the end surface of the guide shoe structure (70) away from the rear packer (212) is an arc-shaped surface; wherein the diameter R1 of the guide shoe structure (70), the diameter R2 of the rear packer (212) in a non-sealed state, and the diameter R3 of the rear packer (212) in a seated state satisfy: R2<R1<R3.

9. The fracturing equipment according to claim 8, characterized in that: The liquid supply device (30) comprises: A liquid storage structure (31) for storing liquid; a liquid supply pipe (32), one end of which is in communication with the liquid storage structure (31), and the other end of which is in communication with an end of the tubular component (10) away from the fracturing body (20); A pump body structure (33) is arranged on the liquid supply pipe (32), and the pump body structure (33) is used to drive the liquid to flow.

10. The fracturing equipment according to claim 1, characterized in that: The liquid supplied by the liquid supply device (30) comprises a first liquid and a second liquid, wherein the first liquid is a fracturing fluid and the second liquid is a dissolving liquid, and the dissolving liquid is used to increase the dissolution rate of the plugging ball (40).

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