Drilling and fracturing integrated foam combustion in-situ fracturing device and method of use

Abstract

The application discloses a drilling and cracking integrated foam combustion in-situ impact fracturing device and a use method, and relates to the technical field of underground engineering construction machinery and methods.The application comprises a front packer, one end of the front packer is fixedly installed with a pressure-sensing excitation device, one end of the pressure-sensing excitation device away from the front packer is fixedly installed with a flow restrictor, one end of the flow restrictor away from the pressure-sensing excitation device is fixedly installed with a rear packer, and one end of the rear packer away from the flow restrictor is fixedly installed with a static pressure limiting device.The application realizes drilling and cracking integration by arranging the front packer, the pressure-sensing excitation device, the flow restrictor, the rear packer and the static pressure limiting device, ensures the continuity of fracturing and drilling processes, realizes the advanced deep hole in-situ pressure control excitation process by the pressure-sensing excitation device, solves the attenuation problem of energy long-distance propagation, and realizes the front and rear end sealing function of the in-pipe channel by the outer channel sealing ring and the static pressure limiting device, thereby guaranteeing the safety and efficiency of fracturing.

Description

Technical Field

[0001] This invention relates to the field of underground engineering construction machinery and construction methods, specifically to an integrated drilling and fracturing foam combustion in-situ impact fracturing device and its usage method. Background Technology

[0002] Currently, in the field of underground engineering construction machinery and construction methods, there exists a field of non-explosive pre-fracture. This field has many technologies and methods used to break, separate, or remove rocks or other solid materials in mining, construction, geological engineering, and other fields, such as hydraulic fracturing technology, hydraulic splitting technology, and carbon dioxide phase change rock breaking technology.

[0003] Existing non-explosive pre-splitting technologies and devices often require pre-drilling, but drilling and pre-splitting are two independent processes that cannot be performed simultaneously, resulting in discontinuity in the process. In addition, in terms of pre-splitting effect, the power source of existing technologies is often located outside the drill hole, resulting in a large degree of energy attenuation and difficulty in achieving precise pressure and positioning for pre-splitting. Therefore, an integrated drilling and splitting foam combustion in-situ impact fracturing device and its application method are proposed. Summary of the Invention

[0004] The purpose of this invention is to address the problem that existing non-explosive pre-splitting technologies and devices often require pre-drilling, and drilling and pre-splitting are two independent processes that cannot be performed simultaneously, resulting in discontinuity in the process. In addition, regarding the pre-splitting effect, the power source of existing technologies is often located outside the drill hole, resulting in a large degree of energy attenuation and difficulty in achieving precise pressure and positioning for pre-splitting. This invention provides an integrated drilling and splitting foam combustion in-situ impact fracturing device and its usage method.

[0005] To achieve the above objectives, the present invention specifically adopts the following technical solution:

[0006] An integrated drilling and fracturing foam combustion in-situ impact fracturing device includes a front packer, a pressure-sensitive excitation device fixedly installed at one end of the front packer, a throttle device fixedly installed at the end of the pressure-sensitive excitation device away from the front packer, a rear packer fixedly installed at the end of the throttle device away from the pressure-sensitive excitation device, and a static pressure limiting device fixedly installed at the end of the rear packer away from the throttle device. The front packer contains a first inner tube, the pressure-sensitive excitation device contains a second inner tube, the throttle device contains a third inner tube, the rear packer contains a fourth inner tube, and the static pressure limiting device contains a fifth inner tube. The first, second, third, fourth, and fifth inner tubes are sequentially connected.

[0007] Furthermore, an outer tube is fixedly installed at the end of the front packer away from the pressure-sensitive actuation device and at the end of the rear packer near the throttle. A shaped plate is fixedly sleeved on each outer tube. A capsule is fixedly sleeved on both the front and rear packers. First and second reversing baffles, distributed in an alternating pattern, are fixedly installed on both the front and rear packers. The first and second reversing baffles, located on the same side, are positioned between the shaped plate and the capsule. An outer channel sealing ring and a first straightening support frame are fixedly sleeved on the first inner tube. The outer channel sealing ring and the first straightening support frame are both fixedly connected to the front packer. The outer channel sealing ring corresponds to the position of the capsule near the outer tube. The first straightening support frame is away from the outer tube. The fourth inner tube is fixedly sleeved with a fourth straightening support front frame and a fourth straightening support rear frame. The fourth straightening support front frame and the fourth straightening support rear frame are both fixedly connected to the front packer. The fourth straightening support front frame corresponds to the position of the capsule near the outer tube. The fourth straightening support rear frame is away from the outer tube.

[0008] Furthermore, both the front packer and the rear packer have a slag guide rib fixedly sleeved on the end away from the outer tube. The positions of the two slag guide ribs correspond to the positions of the first straightening support frame and the fourth straightening support frame, respectively. The cross-sectional dimensions of the irregular plate and the slag guide ribs are both larger than the cross-sectional dimensions of the capsule.

[0009] Furthermore, a pressure sensing device and an ignition fixing device are fixedly installed inside the pressure-sensitive excitation device. An ignition head is fixedly installed on the side of the ignition fixing device close to the pressure sensing device. A control circuit is fixedly installed between the pressure sensing device and the ignition head. A second front support frame and a second rear support frame are fixedly sleeved at both ends of the second inner tube, and both the second front support frame and the second rear support frame are fixedly connected to the pressure-sensitive excitation device.

[0010] Furthermore, a pressure relief port is provided on one side of the throttle, and a third straightening support front frame and a third straightening support rear frame are respectively fixedly sleeved at both ends of the third inner tube. The third straightening support front frame and the third straightening support rear frame are both fixedly connected to the static pressure limiting device.

[0011] Furthermore, the static pressure limiting device is internally provided with a connecting device, and a self-locking ball is fixedly installed inside the connecting device. The self-locking ball is slidably sleeved on the fifth inner tube. A fifth straightening support front frame is fixedly sleeved at one end of the fifth inner tube near the rear packer, and a fifth straightening support rear frame is fixedly sleeved at the other end of the fifth inner tube. Both the fifth straightening support front frame and the fifth straightening support rear frame are fixedly connected to the static pressure limiting device. An annular baffle is fixedly installed inside the static pressure limiting device and is sleeved on the fifth inner tube. The connecting device is slidably installed inside the annular baffle. The self-locking ball is located between the fifth straightening support front frame and the annular baffle. The same spring is fixedly installed between the connecting device and the annular baffle. Multiple guide holes are opened on the side wall of the static pressure limiting device 5, and the positions of the guide holes correspond to the positions of the springs.

[0012] Furthermore, the front packer, the pressure-sensitive actuation device, the throttle, the rear packer, and the static pressure limiting device are fixedly connected in a removable manner.

[0013] The method of using the integrated drilling and fracturing foam combustion in-situ impact fracturing device includes the following steps:

[0014] S1. Connect the front packer, pressure-sensitive excitation device, throttle, rear packer and static pressure limiting device in sequence, and connect the drill bit and drill pipe to the ends of the front packer and static pressure limiting device that are far apart from each other, respectively.

[0015] S2. During drilling, water is injected through the first inner tube, second inner tube, third inner tube, fourth inner tube, and fifth inner tube to flush the drill bit and remove slag. When fracturing occurs, drilling and water injection are stopped. Combustible foam is injected through the channel between the outer tube and the first inner tube in the borehole. After being injected to a certain pressure, the capsule on the front packer expands to generate a certain pressure, i.e., the sealing pressure.

[0016] S3. When the foam pressure rises again, the pressure sensing device detects that the pressure is rising and reaches the preset excitation pressure threshold. It generates a pressure signal and transmits it to the control circuit, which converts it into an electrical signal to control the ignition head to perform delayed excitation.

[0017] S4. During the foam injection process, the spring deforms continuously. When a certain pressure is reached, the connecting device drives the self-locking ball to seal the channel, generating a certain pressure, namely the self-locking pressure, which is equal to or slightly greater than the excitation pressure.

[0018] S5. After a certain period of time, the ignition head is activated, inducing the foam to burn rapidly and pressurize, quickly reaching the threshold of the throttle and rushing out from the pressure relief port to fracture the rock.

[0019] S6. After the pressure gradually decreases following the rupture, the self-locking ball releases, and the capsule recovers.

[0020] S7. Repeat steps S2 to S6 to repeatedly fracture the rock. Once the fracturing is complete, continue drilling.

[0021] S8. After all fracturing and drilling are completed, remove the equipment and clean up the site.

[0022] The beneficial effects of this invention are as follows:

[0023] 1. This invention achieves integrated drilling and fracturing by setting up a front packer, a pressure-sensitive excitation device, a throttle, a rear packer, and a static pressure limiting device, ensuring the continuity of fracturing and drilling processes. The pressure-sensitive excitation device enables in-situ pressure-controlled excitation of deep holes, solving the problem of energy attenuation during long-distance propagation. The outer channel sealing ring and the static pressure limiting device achieve the function of sealing the front and rear ends of the pipe channel, ensuring the safety and efficiency of fracturing.

[0024] 2. This invention, by setting up a pressure sensing device, control circuit and ignition head, enables the pressure sensing device to detect that the pressure is rising and has reached a preset activation pressure threshold when the foam pressure in the inner channel rises again. Then the pressure sensing device will transmit the pressure signal in real time, and the control circuit will convert it into an electrical signal. The ignition head will only be activated with a delay when the pressure reaches the set value and has previously been in a rising state, so as to realize the activation of in-situ high-pressure cracking, which is close to the pre-crack position and solves the problem of energy loss during transmission.

[0025] 3. By setting a first reversing baffle, a second reversing baffle, and an outer channel sealing ring, the first reversing baffle and the second reversing baffle fixed on the front packer and the rear packer can prevent the front packer and the rear packer from reversing and falling off at the connection between the two capsules during drilling. The outer channel sealing ring is used to seal the front end of the inner and outer channels of the tube, ensuring the realization of in-situ impact fracturing.

[0026] 4. By setting up irregularly shaped plates and guide ribs, the present invention can protect the guide ribs from both the front and rear positions during drilling, even though the size of the irregularly shaped plates and guide ribs exceeds that of the capsule. This not only protects the guide ribs but also facilitates the discharge of slag and broken rock by cooperating with the water injected into the first, second, third, fourth, and fifth inner tubes.

[0027] 5. This invention, by setting up a connecting device, a self-locking ball, a spring, a guide hole, and an annular baffle, ensures that when the pressure reaches a certain value, a pressure difference is formed between the inner and outer channels of the device due to the presence of the guide hole. After the spring is compressed to a certain extent, it will drive the self-locking ball to contact the annular baffle through the connecting device. Together with the previous outer channel sealing ring, it forms a complete seal on both sides of the outer channel, generating self-locking pressure. This achieves constant pressure sealing in the pipeline, providing the function of sealing the front and rear ends of the pipeline channel, ensuring the safety and efficiency of fracturing. Attached Figure Description

[0028] Figure 1 This is a cross-sectional structural schematic diagram of the integrated drilling and fracturing foam combustion in-situ impact fracturing device of the present invention;

[0029] Figure 2 This is a cross-sectional view of the front packer structure of the present invention;

[0030] Figure 3 This is a schematic diagram of the left-side structure of the front packer of the present invention;

[0031] Figure 4 This is the present invention. Figure 2 Schematic diagram of the cross-sectional structure at point AA;

[0032] Figure 5 This is the present invention. Figure 2 Schematic diagram of the cross-sectional structure at point BB;

[0033] Figure 6 This is a three-dimensional structural diagram of the irregularly shaped plate and the front packer of the present invention.

[0034] Figure 7 This is a cross-sectional view of the pressure-sensitive excitation device of the present invention;

[0035] Figure 8 This is a schematic cross-sectional view of the throttle device of the present invention;

[0036] Figure 9 This is a cross-sectional view of the rear packer structure of the present invention;

[0037] Figure 10 This is a cross-sectional view of the static pressure limiting device of the present invention;

[0038] Figure 11 This is the present invention. Figure 10 Schematic diagram of the cross-sectional structure at the CC section;

[0039] Figure 12 This is the present invention. Figure 10 Schematic diagram of the cross-sectional structure at the middle DD section;

[0040] Reference numerals: 1. Front packer; 2. Pressure-sensitive actuation device; 3. Throttling device; 4. Rear packer; 5. Static pressure limiting device; 6. First inner tube; 7. Outer tube; 8. Shaped plate; 9. First reversing baffle; 10. Second reversing baffle; 11. Outer channel sealing ring; 12. Capsule; 13. Slag guide rib; 14. First uprighting support frame; 15. Pressure sensing device; 16. Control circuit; 17. Ignition head; 18. Ignition fixing device; 19. Second inner tube; 20. 21. Second straightening support front frame; 22. Second straightening support rear frame; 23. Pressure relief port; 24. Third inner tube; 25. Third straightening support front frame; 26. Third straightening support rear frame; 27. Fourth straightening support front frame; 28. Fourth straightening support rear frame; 29. ​​Connecting device; 30. Self-locking ball; 31. Spring; 32. Guide hole; 33. Annular baffle; 34. Fifth inner tube; 35. Fifth straightening support front frame; 36. Fifth straightening support rear frame. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0042] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0043] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0044] In the description of the embodiments of the present invention, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0045] like Figures 1 to 12As shown, the integrated drilling and fracturing foam combustion in-situ impact fracturing device and its usage method include a front packer 1, a pressure-sensitive excitation device 2 fixedly installed at one end of the front packer 1, a throttle 3 fixedly installed at the end of the pressure-sensitive excitation device 2 away from the front packer 1, a rear packer 4 fixedly installed at the end of the throttle 3 away from the pressure-sensitive excitation device 2, and a static pressure limiting device 5 fixedly installed at the end of the rear packer 4 away from the throttle 3. The front packer 1 has a first inner tube 6 inside, the pressure-sensitive excitation device 2 has a second inner tube 19 inside, the throttle 3 has a third inner tube 23 inside, the rear packer 4 has a fourth inner tube 26 inside, and the static pressure limiting device 5 has a fifth inner tube 34 inside. The first inner tube 6, the second inner tube 19, and the third inner tube 23 are also described. The fourth inner tube 26 and the fifth inner tube 34 are connected in sequence. In this embodiment, the front packer 1 and the static pressure limiting device 5 need to work with the drill bit, drill rod, and drilling rig to carry out drilling work, and work with the foam and water injection devices. Specifically, the integrated drilling and fracturing foam combustion in-situ impact fracturing device achieves integrated drilling and fracturing by setting the front packer 1, pressure-sensitive excitation device 2, throttle device 3, rear packer 4, and static pressure limiting device 5, ensuring the continuity of fracturing and drilling processes. The pressure-sensitive excitation device 2 realizes the advanced deep hole in-situ pressure-controlled excitation process, solving the problem of energy attenuation over long distances. The outer channel sealing ring 11 and the static pressure limiting device 5 realize the function of sealing the front and rear ends of the inner channel, ensuring the safety and efficiency of fracturing.

[0046] like Figure 2 , Figure 4 , Figure 5 , Figure 9As shown, an outer tube 7 is fixedly installed at the end of the front packer 1 away from the pressure-sensitive actuation device 2 and at the end of the rear packer 4 near the throttle device 3. A shaped plate 8 is fixedly sleeved on the outer tube 7. A capsule 12 is fixedly sleeved on both the front packer 1 and the rear packer 4. A first reversing baffle 9 and a second reversing baffle 10, which are staggered and located on the same side, are located on the shaped plate 8. Between capsules 12, an outer channel sealing ring 11 and a first straightening support frame 14 are fixedly sleeved on the first inner tube 6. Both the outer channel sealing ring 11 and the first straightening support frame 14 are fixedly connected to the front packer 1. The outer channel sealing ring 11 corresponds to the position of the end of capsule 12 near the outer tube 7. The first straightening support frame 14 is away from the outer tube 7. A fourth straightening support front frame 27 and a fourth straightening support rear frame 28 are fixedly sleeved on the fourth inner tube 26. The fourth straightening support front frame 27... The fourth straightening support rear frame 28 is fixedly connected to the front packer 1. The fourth straightening support front frame 27 corresponds to the position of the capsule 12 near the outer tube 7. The fourth straightening support rear frame 28 is away from the outer tube 7. Specifically, during drilling, water is injected through the first inner tube 6, the second inner tube 19, the third inner tube 23, the fourth inner tube 26, and the fifth inner tube 34 to flush the drill bit and remove slag. When fracturing occurs, drilling and water injection are stopped. Combustible foam is injected through the channel between the outer tube 7 and the first inner tube 6 in the borehole. After being injected to a certain pressure, the capsule 12 on the front packer 1 expands, generating a certain pressure, i.e., the sealing pressure. The first reversing baffle 9 and the second reversing baffle 10 are fixed on the front packer 1 and the rear packer 4 to prevent the connection between the front packer 1 and the rear packer 4 and the two capsules 12 from reversing and falling off during drilling. The outer channel sealing ring 11 is used to seal the front end of the inner and outer channels to ensure the realization of in-situ impact fracturing.

[0047] like Figure 2 , Figure 3 , Figure 6 As shown, both the front packer 1 and the rear packer 4 have a slag guide rib 13 fixedly sleeved on the end away from the outer tube 7. The positions of the two slag guide ribs 13 correspond to the positions of the first straightening support frame 14 and the fourth straightening support rear frame 28, respectively. The cross-sectional dimensions of the irregular plate 8 and the slag guide rib 13 are larger than the cross-sectional dimensions of the capsule 12. Specifically, by setting the irregular plate 8 and the slag guide rib 13, the irregular plate 8 and the slag guide rib 13, which are larger than the capsule 12, can protect the slag guide rib 13 from the front and rear positions respectively during drilling. This not only protects the slag guide rib 13, but also facilitates the discharge of slag and broken rock with the water injected into the first inner tube 6, the second inner tube 19, the third inner tube 23, the fourth inner tube 26, and the fifth inner tube 34.

[0048] like Figure 7As shown, a pressure sensor 15 and an ignition fixing device 18 are fixedly installed inside the pressure-sensitive arousing device 2. An ignition head 17 is fixedly installed on the side of the ignition fixing device 18 near the pressure sensor 15. A control circuit 16 is fixedly installed between the pressure sensor 15 and the ignition head 17. A second straightening support front frame 20 and a second straightening support rear frame 21 are respectively fixedly sleeved at both ends of the second inner tube 19. Both the second straightening support front frame 20 and the second straightening support rear frame 21 are fixedly connected to the pressure-sensitive arousing device 2. Specifically, by setting a pressure sensor... The force sensor 15, control circuit 16, and ignition head 17 enable the pressure sensor 15 to detect the rising pressure and reach the preset activation pressure threshold when the foam pressure in the inner channel increases again. Then, the pressure sensor 15 will transmit the pressure signal in real time, and the control circuit 16 will convert it into an electrical signal. The ignition head 17 will only be activated with a delay when the pressure reaches the set value and has previously been in a rising state, so as to realize the activation of in-situ high-pressure fracturing, which is close to the pre-fracturing position and solves the problem of energy loss during transmission.

[0049] like Figure 8 As shown, a pressure relief port 22 is provided on one side of the throttle 3. The two ends of the third inner tube 23 are respectively fixedly sleeved with the third straightening support front frame 24 and the third straightening support rear frame 25. The third straightening support front frame 24 and the third straightening support rear frame 25 are both fixedly connected to the static pressure limiting device 5. Specifically, by setting the pressure relief port 22, the foam in the channel between the outer tube 7 and the first inner tube 6 will quickly reach the threshold of the throttle 3 after rapid combustion and pressurization, and will rush out of the pressure relief port 22 to fracture the rock.

[0050] like Figure 10 , Figure 11 , Figure 12As shown, the static pressure limiting device 5 has a connecting device 29 inside. A self-locking ball 30 is fixedly installed inside the connecting device 29 and slidably sleeved on the fifth inner tube 34. A fifth straightening support front frame 35 is fixedly sleeved at one end of the fifth inner tube 34 near the rear packer 4, and a fifth straightening support rear frame 36 is fixedly sleeved at the other end of the fifth inner tube 34. Both the fifth straightening support front frame 35 and the fifth straightening support rear frame 36 are fixedly connected to the static pressure limiting device 5. An annular baffle 33 is fixedly installed inside the static pressure limiting device 5 and sleeved on the fifth inner tube 34. The connecting device 29 is slidably installed inside the annular baffle 33. The self-locking ball 30 is located between the fifth straightening support front frame 35 and the annular baffle 33. A single spring 31 is fixedly installed between the annular baffles 33. Multiple guide holes 32 are provided on the side wall of the static pressure limiting device 5, and the positions of the guide holes 32 correspond to the positions of the springs 31. Specifically, by setting up the connecting device 29, the self-locking ball 30, the spring 31, the guide holes 32, and the annular baffles 33, after the pressure reaches a certain value, due to the presence of the guide holes 32, a pressure difference is formed in the inner and outer channels of the device. After the spring 31 is compressed to a certain extent, it will drive the self-locking ball 30 to contact the annular baffles 33 through the connecting device 29. Together with the previous outer channel sealing ring 11, a complete seal is formed on both sides of the outer channel, generating self-locking pressure. This achieves constant pressure sealing in the pipeline, and plays the role of sealing the front and rear ends of the pipeline channel, ensuring the safety and efficiency of crack initiation.

[0051] like Figure 1 As shown, the front packer 1, pressure-sensitive excitation device 2, throttle device 3, rear packer 4, and static pressure limiting device 5 adopt a fixed connection method that can be repeatedly disassembled; specifically, the front packer 1, pressure-sensitive excitation device 2, throttle device 3, rear packer 4, and static pressure limiting device 5 adopt a detachable connection method to facilitate repeated operations of multi-point fracturing and drilling.

[0052] The method of using the integrated drilling and fracturing foam combustion in-situ impact fracturing device includes the following steps:

[0053] S1. Connect the front packer 1, pressure-sensitive excitation device 2, throttle device 3, rear packer 4 and static pressure limiting device 5 in sequence. Connect the drill bit and drill rod to the ends of the front packer 1 and static pressure limiting device 5 that are far apart from each other.

[0054] S2. During drilling, water is injected through the first inner tube 6, the second inner tube 19, the third inner tube 23, the fourth inner tube 26, and the fifth inner tube 34 to flush the drill bit and remove slag. When fracturing occurs, drilling and water injection are stopped, and combustible foam is injected through the channel between the outer tube 7 and the first inner tube 6 in the borehole. After being injected to a certain pressure, the capsule 12 on the front packer 1 expands, generating a certain pressure, i.e., the sealing pressure.

[0055] S3. When the foam pressure rises again, the pressure sensing device 15 detects that the pressure is rising and reaches the preset activation pressure threshold. It generates a pressure signal and transmits it to the control circuit 16, which converts it into an electrical signal to control the ignition head 17 to perform delayed activation.

[0056] S4. During the foam injection process, the spring 31 deforms continuously. When a certain pressure is reached, it drives the self-locking ball 30 to seal the channel through the connecting device 29, generating a certain pressure, namely the self-locking pressure, which is equal to or slightly greater than the excitation pressure.

[0057] S5. After a certain period of time, the ignition head 17 is activated, which induces the foam to burn rapidly and pressurize, quickly reaching the threshold of the throttle 3 and rushing out from the pressure relief port 22 to fracture the rock.

[0058] S6. After the rupture, the pressure gradually decreases, the self-locking ball 30 releases, and the capsule 12 recovers.

[0059] S7. Repeat steps S2 to S6 to repeatedly fracture the rock. Once the fracturing is complete, continue drilling.

[0060] S8. After all fracturing and drilling are completed, remove the equipment and clean up the site; specifically, ...

[0061] In summary, this integrated drilling and fracturing foam combustion in-situ impact fracturing device achieves integrated drilling and fracturing by setting up a front packer 1, a pressure-sensitive excitation device 2, a throttle 3, a rear packer 4, and a static pressure limiting device 5. This ensures the continuity of the fracturing and drilling processes. The pressure-sensitive excitation device 2 enables advanced deep hole in-situ pressure-controlled excitation, solving the problem of energy attenuation during long-distance propagation. The outer channel sealing ring 11 and the static pressure limiting device 5 achieve the function of sealing the front and rear ends of the pipe channel, ensuring the safety and efficiency of fracturing.

[0062] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. An integrated drilling and fracturing foam combustion in-situ impact fracturing device, characterized in that, The device includes a front packer (1), a pressure-sensitive excitation device (2) fixedly installed at one end of the front packer (1), a throttle (3) fixedly installed at the end of the pressure-sensitive excitation device (2) away from the front packer (1), a rear packer (4) fixedly installed at the end of the throttle (3) away from the pressure-sensitive excitation device (2), and a static pressure limiting device (5) fixedly installed at the end of the rear packer (4) away from the throttle (3). The front packer (1) has a first inner tube (6) inside, the pressure-sensitive excitation device (2) has a second inner tube (19) inside, the throttle (3) has a third inner tube (23) inside, the rear packer (4) has a fourth inner tube (26) inside, and the static pressure limiting device (5) has a fifth inner tube (34) inside. The first inner tube (6) The second inner tube (19), the third inner tube (23), the fourth inner tube (26), and the fifth inner tube (34) are connected in sequence. The front packer (1) at the end away from the pressure-sensitive excitation device (2) and the rear packer (4) at the end near the throttle (3) are both fixedly installed with an outer tube (7). The interlayer between the outer tube (7) and the first inner tube (6) is used as a channel for injecting combustible foam. The front packer (1) and the rear packer (4) are both fixedly fitted with capsules (12). The first inner tube (6) is fixedly fitted with an outer channel sealing ring (11) and a first straightening support frame (14). The position of the outer channel sealing ring (11) corresponds to the position of the capsule (12) near the end of the outer tube (7). A pressure relief port (22) is opened on one side of the throttle (3). The static pressure limiting device (5) is internally provided with a connecting device (29), and a self-locking ball (30) is fixedly installed inside the connecting device (29). The self-locking ball (30) is slidably sleeved on the fifth inner tube (34). The fifth inner tube (34) is fixedly sleeved with a fifth straightening support front frame (35) at one end near the rear packer (4), and a fifth straightening support rear frame (36) is fixedly sleeved at the other end of the fifth inner tube (34). The fifth straightening support front frame (35) and the fifth straightening support rear frame (36) are both fixedly connected to the static pressure limiting device (5). An annular baffle (33) is fixedly installed inside the device (5). The annular baffle (33) is sleeved on the fifth inner tube (34). The connecting device (29) is slidably installed inside the annular baffle (33). The self-locking ball (30) is located between the fifth straightening support front frame (35) and the annular baffle (33). The same spring (31) is fixedly installed between the connecting device (29) and the annular baffle (33). Multiple guide holes (32) are opened on the side wall of the static pressure limiting device (5). The positions of the guide holes (32) correspond to the positions of the springs (31).

2. The integrated drilling and fracturing foam combustion in-situ impact fracturing device according to claim 1, characterized in that, A shaped plate (8) is fixedly sleeved on each of the outer tubes (7). A first reversing baffle (9) and a second reversing baffle (10) are fixedly installed on both the front packer (1) and the rear packer (4). The first reversing baffle (9) and the second reversing baffle (10) on the same side are located between the shaped plate (8) and the capsule (12). The outer channel sealing ring (11) and the first straightening support frame (14) are both fixedly connected to the front packer (1). The frame (14) is away from the outer tube (7). The fourth inner tube (26) is fixedly sleeved with the fourth straightening support front frame (27) and the fourth straightening support rear frame (28). The fourth straightening support front frame (27) and the fourth straightening support rear frame (28) are both fixedly connected to the inner cavity of the rear packer (4). The fourth straightening support front frame (27) corresponds to the position of the capsule (12) near the outer tube (7). The fourth straightening support rear frame (28) is away from the outer tube (7).

3. The integrated drilling and fracturing foam combustion in-situ impact fracturing device according to claim 2, characterized in that, Both the front packer (1) and the rear packer (4) have a slag guide rib (13) fixedly sleeved on the end away from the outer tube (7). The positions of the two slag guide ribs (13) correspond to the positions of the first straightening support frame (14) and the fourth straightening support rear frame (28), respectively. The cross-sectional dimensions of the irregular plate (8) and the slag guide ribs (13) are larger than the cross-sectional dimensions of the capsule (12).

4. The integrated drilling and fracturing foam combustion in-situ impact fracturing device according to claim 1, characterized in that, The pressure-sensitive excitation device (2) is internally fixedly equipped with a pressure sensor (15) and an ignition fixing device (18). An ignition head (17) is fixedly installed on the side of the ignition fixing device (18) close to the pressure sensor (15). A control circuit (16) is fixedly installed between the pressure sensor (15) and the ignition head (17). The two ends of the second inner tube (19) are respectively fixedly sleeved with a second front support frame (20) and a second rear support frame (21). The second front support frame (20) and the second rear support frame (21) are both fixedly connected to the pressure-sensitive excitation device (2).

5. The integrated drilling and fracturing foam combustion in-situ impact fracturing device according to claim 1, characterized in that, The third inner tube (23) is fixedly sleeved with a third front support frame (24) and a third rear support frame (25) at both ends. The third front support frame (24) and the third rear support frame (25) are both fixedly connected to the inner cavity of the throttle (3).

6. The integrated drilling and fracturing foam combustion in-situ impact fracturing device according to claim 1, characterized in that, The front packer (1), the pressure-sensitive excitation device (2), the throttle (3), the rear packer (4), and the static pressure limiting device (5) are fixedly connected in a removable manner.

7. The method of using the integrated drilling and fracturing foam combustion in-situ impact fracturing device according to any one of claims 1-5, characterized in that: Includes the following steps: S1. Connect the front packer (1), pressure-sensitive excitation device (2), throttle (3), rear packer (4) and static pressure limiting device (5) in sequence. Connect the drill bit and drill rod to the ends of the front packer (1) and static pressure limiting device (5) that are far apart from each other. S2. During drilling, water is injected through the first inner tube (6), the second inner tube (19), the third inner tube (23), the fourth inner tube (26), and the fifth inner tube (34) to flush the drill bit and remove slag. When fracturing occurs, drilling and water injection are stopped. Combustible foam is injected through the channel between the outer tube (7) and the first inner tube (6) in the borehole. After being injected to a certain pressure, the capsule (12) on the front packer (1) expands to generate a certain pressure, i.e., the sealing pressure. S3. When the foam pressure rises again, the pressure sensing device (15) detects that the pressure is rising and reaches the preset excitation pressure threshold. It generates a pressure signal and transmits it to the control circuit (16) to convert it into an electrical signal, which controls the ignition head (17) to perform delayed excitation. S4. During the foam injection process, the spring (31) deforms continuously. When a certain pressure is reached, the connecting device (29) drives the self-locking ball (30) to seal the channel, generating a certain pressure, namely the self-locking pressure, which is equal to or slightly greater than the excitation pressure. S5. After a certain period of time, the ignition head (17) is activated, which induces the foam to burn rapidly and pressurize, quickly reaching the threshold of the throttle (3) and rushing out of the pressure relief port (22) to fracture the rock. S6. After the pressure gradually decreases after the rupture, the self-locking ball (30) releases and the capsule (12) recovers; S7. Repeat steps S2 to S6 to repeatedly fracture the rock. Once the fracturing is complete, continue drilling. S8. After all fracturing and drilling are completed, remove the equipment and clean up the site.

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