A high-efficiency fracturing combined device for multistage horizontal wells

Abstract

The application discloses a high-efficiency fracturing combined device for a multistage horizontal well, which comprises a sleeve and an ejector, the ejector is arranged at one end of the sleeve, and the outer wall of the ejector is provided with an ejection port, so that water forms a high-speed water jet, breaks through the sleeve, and cracks the stratum. The application has the beneficial effects that: the drill bit is fixed at one end of the sleeve by clamping the clamping block in the mounting groove, the pump is stopped, the sleeve is moved into the horizontal well, the connecting cylinder is moved, the drill bit is moved into the horizontal well, the drill bit contacts the stratum of the horizontal well before the sleeve, the phenomenon of the sleeve impact is reduced, the sleeve is protected, the service life of the sleeve is prolonged, and when the ejector does not eject outward, the baffle covers the ejection port to shield the ejection port, so that the ejector is prevented from being blocked by the soil in the bottom layer when the ejector is not started.

Description

Technical Field

[0001] This invention relates to a horizontal well production tool assembly, specifically a high-efficiency fracturing assembly for multi-stage horizontal wells, belonging to the field of horizontal well production technology. Background Technology

[0002] With the continuous advancement of oil and gas resource exploration and development technologies both domestically and internationally, major oilfields in China are vigorously promoting horizontal well development technology, with the core objectives of improving reservoir utilization, increasing recovery rates, increasing single-well production, and reducing extraction costs.

[0003] In existing technologies, high-speed water jets are mainly generated by casing injectors to break through the casing and formation. Then, the target formation is stimulated by adding sand to the tubing and fluid to the annulus. By controlling the stimulation of each segment, the production efficiency is improved. However, existing high-efficiency fracturing combination devices for multi-stage horizontal wells have certain limitations in use. Before the casing is inserted into the horizontal well, the formation is explored by drilling, which disrupts the internal balance of the bottom layer. This can easily lead to instability of the wellbore, resulting in the falling of rocks and other impurities into the well and the narrowing of the well diameter. As a result, the front end of the casing is prone to collision with rocks and other impurities when it is inserted into the horizontal well, causing certain damage. Moreover, when the existing injectors are not injecting, the injection port is easily blocked by rocks and other impurities, affecting the fracturing effect. Therefore, a high-efficiency fracturing combination device for multi-stage horizontal wells is proposed to solve the above problems. Summary of the Invention

[0004] This invention achieves the above objective through the following technical solution: a high-efficiency fracturing assembly for multi-stage horizontal wells, comprising: The casing and the ejector are provided. One end of the casing is provided with an ejector, and the outer wall of the ejector is provided with a spray nozzle, so that the water forms a high-speed water jet, which penetrates the casing and presses open the formation. A protective component is provided at one end of the casing. This protective component acts on the right end of the casing and contacts the formation before the casing, further protecting the casing. The protective component includes a connecting sleeve and a drill bit. A socket is provided through the right end of the connecting sleeve, and an installation rod is fixedly provided at the left end of the drill bit, with the left end of the installation rod inserted into the socket.

[0005] Preferably, the outer wall of the injector is provided with a connecting groove, and a baffle is movably inserted into the inner wall of the connecting groove. A connecting block is fixedly provided on the outer wall of the baffle, and a rotating shaft is fixedly provided on the outer wall of the connecting block. The rotating shaft is rotatably inserted into the inner wall of the injector.

[0006] Preferably, a first connecting plate is fixedly installed at one end of the rotating shaft, and a return spring is fixedly installed on the outer wall of the first connecting plate. A second connecting plate is fixedly installed at the other end of the return spring, and the second connecting plate is fixedly installed in the inner wall of the ejector cavity. The ejector moves with the casing to perform multi-stage horizontal well modification.

[0007] Preferably, a fixing block is fixedly provided at the right end of the sleeve, and a connecting rod is fixedly provided at the right end of the fixing block, and a connecting cylinder is fixedly provided at the right end of the connecting rod.

[0008] Preferably, a fixing rod is fixedly provided on the right wall of the fixing block, a movable groove is provided on the outer wall of the fixing rod, a locking block is movably engaged in the inner wall of the movable groove, and an installation groove is provided on the outer wall of the mounting rod, with the outer end of the locking block engaged in the installation groove.

[0009] Preferably, a push spring is fixedly provided on the inner wall of the moving groove cavity, and the other end of the push spring is fixedly provided on the locking block.

[0010] Preferably, a fixing plate is fixedly provided on the left wall of the connecting cylinder, and a sliding groove is opened on the left wall of the connecting cylinder, and a sliding plate is movably engaged with the inner wall of the sliding groove.

[0011] Preferably, a compression spring is fixedly provided on the inner wall of the groove cavity, and the other end of the compression spring is fixedly installed on the sliding plate.

[0012] Preferably, a transmission plate is fixedly installed on the left end of the sliding plate.

[0013] Preferably, an adjusting block is fixedly provided on the outer wall of the sliding plate, and a groove is provided on the outer wall of the corresponding connecting rod, and the outer wall of the adjusting block is engaged in the groove provided on the outer wall of the corresponding connecting rod.

[0014] The beneficial effects of this invention are: This high-efficiency fracturing assembly for multi-stage horizontal wells, through the connection relationship between the casing, injector, connecting sleeve, and drill bit, uses a locking block that engages in the installation groove to fix the drill bit at one end of the casing. When the pump is stopped and the blowout is released, the casing is dragged deeper into the horizontal well, pushing the connecting sleeve to move the drill bit into the horizontal well. The drill bit contacts the formation in the horizontal well before the casing, reducing impact on the casing and protecting it, thus extending its service life. Furthermore, by pressing the locking block, it disengages from the installation groove, and by moving it to the right... Pulling the drill bit makes it easy to remove it from the right end of the casing, facilitating storage or replacement, improving operation and usability. Furthermore, by configuring the connection between the injector, connecting groove, connecting block, and return spring, when the injector is not spraying outwards, a baffle covers the nozzle, preventing blockage by soil in the lower layers. When the injector is activated, water flows outwards through the nozzle, striking the baffle and causing it to rotate outwards, moving it out of the connecting groove for easy use. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the injector structure of the present invention; Figure 3 This is a schematic diagram of the connecting block structure of the present invention; Figure 4 This is a schematic diagram of the reset spring structure of the present invention; Figure 5 This is a schematic diagram of the connecting cylinder structure of the present invention; Figure 6 This is a schematic diagram of the fixing block structure of the present invention; Figure 7 This is a cross-sectional view of the fixing rod structure of the present invention; Figure 8 This is a schematic diagram of the mounting rod structure of the present invention.

[0016] In the diagram: 1. Sleeve; 2. Injector; 201. Injection port; 202. Connecting groove; 203. Baffle; 204. Connecting block; 205. Rotating shaft; 206. First connecting plate; 207. Return spring; 208. Second connecting plate; 3. Fixing block; 301. Connecting rod; 302. Connecting cylinder; 303. Insert; 304. Fixing plate; 305. Slide groove; 306. Sliding plate; 307. Transmission plate; 308. Compression spring; 309. Adjusting block; 4. Drill bit; 401. Mounting rod; 402. Mounting groove; 5. Fixing rod; 501. Moving groove; 502. Push spring; 503. Locking block. Detailed Implementation

[0017] 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] This invention discloses a high-efficiency fracturing assembly for multi-stage horizontal wells, such as... Figure 1-8 As shown, it includes: The casing 1 and the ejector 2 are provided. One end of the casing 1 is equipped with the ejector 2, and the outer wall of the ejector 2 is provided with the injection port 201, so that the water forms a high-speed water jet, which penetrates the casing and presses open the formation. In use, the high-speed water jet is mainly formed by the ejector 2 to open the casing and the formation. Then, the target layer is stimulated by adding sand to the tubing and fluid replenishing the annulus. The tubing string is dragged to the next section of construction to realize the segmented stimulation of the horizontal well. This is how multi-stage segmented construction is carried out. A protective component is provided at one end of the casing 1. This protective component acts on the right end of the casing 1, making contact with the formation before the casing 1, and further protecting the casing 1. The protective component includes a connecting sleeve 302 and a drill bit 4. A socket 303 is provided through the right end of the connecting sleeve 302. An installation rod 401 is fixedly provided on the left end of the drill bit 4, and the left end of the installation rod 401 is inserted into the socket 303. When the pump is stopped and the blowout is released, the casing 1 is dragged and moved, which pushes the connecting sleeve 302 to move, so that the drill bit 4 moves into the horizontal well, moving before the casing 1, thus protecting the casing 1.

[0019] The outer wall of the injector 2 has a connecting groove 202, and a baffle 203 is movably inserted into the inner wall of the connecting groove 202. A connecting block 204 is fixedly installed on the outer wall of the baffle 203, and a rotating shaft 205 is fixedly installed on the outer wall of the connecting block 204. The rotating shaft 205 is rotatably inserted into the inner wall of the injector 2. When the injector 2 is not spraying outward, the baffle 203 covers the spray nozzle 201 and blocks the spray nozzle 201 to prevent the injector 2 from being blocked by the soil in the bottom layer when it is not started. When the injector 2 is started, the water flows outward through the spray nozzle 201 and hits the baffle 203 outward, causing the baffle 203 to rotate outward and move out of the connecting groove 202 for easy use.

[0020] A first connecting plate 206 is fixedly installed at one end of the rotating shaft 205, and a return spring 207 is fixedly installed on the outer wall of the first connecting plate 206. A second connecting plate 208 is fixedly installed at the other end of the return spring 207, and the second connecting plate 208 is fixedly installed in the inner wall of the inner cavity of the injector 2. The injector 2 moves with the casing 1 to carry out multi-stage modification of the horizontal well. When the injector 2 is not started, the restoring force of the return spring 207 pulls the first connecting plate 206 back, causing the first connecting plate 206 to pull the rotating shaft 205 back, so that the rotating shaft 205 drives the baffle 203 to move back into the connecting groove 202, which facilitates the shielding of the injection port 201 and makes it easy to re-protect the injection port 201.

[0021] A fixing block 3 is fixedly installed at the right end of the sleeve 1, and a connecting rod 301 is fixedly installed at the right end of the fixing block 3. A connecting cylinder 302 is fixedly installed at the right end of the connecting rod 301, and the connecting cylinder 302 is connected to the sleeve 1.

[0022] A fixing rod 5 is fixedly installed on the right wall of the fixing block 3. A moving groove 501 is opened on the outer wall of the fixing rod 5. A locking block 503 is movably engaged in the inner wall of the moving groove 501. An installation groove 402 is opened on the outer wall of the mounting rod 401, and the outer end of the locking block 503 is engaged in the installation groove 402. The mounting rod 401 is sleeved on the outer wall of the fixing rod 5, and the locking block 503 is engaged in the installation groove 402, which facilitates the installation and fixing of the drill bit 4 on the fixing block 3.

[0023] A push spring 502 is fixedly installed on the inner wall of the moving groove 501, and the other end of the push spring 502 is fixedly installed on the locking block 503. The locking block 503 is automatically pushed outward by the pushing force of the push spring 502, so that the locking block 503 automatically locks into the corresponding mounting groove 402, which facilitates the fixing of the position of the drill bit 4.

[0024] The user inserts the left end of the mounting rod 401 into the socket 303 and pushes the drill bit 4 to the right, causing the mounting groove 402 to move out of the connecting cylinder 302 and the mounting rod 401 to fit onto the outer wall of the fixed rod 5. At this time, by pressing the locking block 503 inward, the locking block 503 is retracted into the moving groove 501. The user continues to move the mounting rod 401. When the locking block 503 is aligned with the mounting groove 402, the user pushes the locking block 503 outward by the pushing force of the spring 502, so that the locking block 503 automatically engages with the mounting groove 402. This makes it easy to install the drill bit 4 on the fixed block 3 and provides strong stability. The user can also push the locking block 503 inward to disengage it from the mounting groove 402. At this time, by pulling the drill bit 4 to the right, the drill bit 4 moves the mounting rod 401 out of the connecting cylinder 302, making it easy to remove the drill bit 4 from the right end of the sleeve 1 for storage or replacement. This improves its usability.

[0025] A fixing plate 304 is fixedly installed on the left wall of the connecting cylinder 302. A sliding groove 305 is opened on the left wall of the connecting cylinder 302, and a sliding plate 306 is movably engaged with the inner wall of the sliding groove 305. The fixing plate 304 and the sliding plate 306 wrap around the fixing rod 5, thereby protecting the locking block 503 and reducing the impact of impurities inside the bottom layer on the locking block 503. This allows the mounting rod 401 to detach from the fixing rod 5 at will, which facilitates the improvement of the installation stability of the drill bit 4.

[0026] A compression spring 308 is fixedly installed on the inner wall of the inner cavity of the slide groove 305, and the other end of the compression spring 308 is fixedly installed on the sliding plate 306. The sliding plate 306 is squeezed and pushed by the pushing force of the compression spring 308, so that the sliding plate 306 and the fixed plate 304 surround and protect the card block 503.

[0027] A transmission plate 307 is fixedly installed on the left end of the sliding plate 306 to connect the two sliding plates 306 together so that they can move simultaneously.

[0028] An adjustment block 309 is fixedly provided on the outer wall of the sliding plate 306, which makes it convenient for the user to adjust the position of the sliding plate 306. The outer wall of the corresponding connecting rod 301 is provided with a groove, and the outer wall of the adjustment block 309 is engaged in the groove on the outer wall of the corresponding connecting rod 301 for easy concealment.

[0029] The user can move the adjusting block 309 upwards, causing the sliding plate 306 to move upwards, thus exposing the fixing rod 5. This allows the user to easily adjust the locking block 503. By releasing the adjusted block 309, the squeezing spring 308 presses and pushes the sliding plate 306, causing it to return to its original position. This allows the fixing rod 5 to be concealed within the sliding plate 306 and the fixing plate 304, reducing the impact of impurities on the locking block 503 and preventing the mounting rod 401 from easily detaching from the fixing rod 5, thereby improving the stability of the drill bit 4 installation.

[0030] For those skilled in the art, by setting the connection relationship between casing 1, ejector 2, connecting sleeve 302, and drill bit 4, with the locking block 503 engaging in the mounting groove 402, drill bit 4 is fixedly installed at one end of casing 1. When the pump is stopped and the ejector is released, casing 1 is dragged deeper into the horizontal well, pushing the connecting sleeve 302 to move drill bit 4 into the horizontal well. Drill bit 4 contacts the formation in the horizontal well before casing 1, reducing the impact on casing 1 and providing protection, thus improving its service life. Furthermore, by pressing the locking block 503, the locking block 503 is disengaged from the mounting slot 402. By pulling the drill bit 4 to the right, the drill bit 4 can be easily removed from the right end of the casing 1, facilitating storage or replacement of the drill bit 4, improving operation and enhancing its practicality. Moreover, by configuring the connection relationship between the injector 2, the connecting slot 202, the connecting block 204, and the return spring 207, when the injector 2 is not spraying, the baffle 203 covers the spray nozzle 201, blocking the spray nozzle 201 and preventing the injector 2 from spraying outwards. When the jet injector 2 is activated, water is sprayed outward through the jet nozzle 201, striking the baffle 203 and causing it to rotate outward, thus moving the baffle 203 out of the connecting groove 202 for easier use. The connection relationship between the connecting cylinder 302, fixing plate 304, sliding groove 305, sliding plate 306, and locking block 503 causes the pushing force of the compression spring 308 to compress and push the sliding plate 306. By pushing the adjusting block 309 upward, the adjusting block 309 moves upward, bringing... The sliding plate 306 moves upward, exposing the fixing rod 5, which makes it convenient for the user to adjust the locking block 503. By releasing the toggled adjusting block 309, the squeezing force of the compression spring 308 pushes the sliding plate 306, causing the sliding plate 306 to return to its original position. This makes it easier to enclose the fixing rod 5 within the sliding plate 306 and the fixing plate 304, making it easier to hide. This reduces the impact of impurities inside the bottom layer on the locking block 503, and allows the mounting rod 401 to detach from the fixing rod 5, thus improving the installation stability of the drill bit 4.

[0031] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-efficiency fracturing assembly for multi-stage horizontal wells, comprising: The casing (1) and the ejector (2) are provided at one end of the casing (1) and the ejector (2) is provided with an ejector (201) on the outer wall of the ejector (2) so that the water forms a high-speed water jet, which penetrates the casing and presses open the formation. The casing (1) is characterized by having a protective component at one end. The protective component acts on the right end of the casing (1) and contacts the formation before the casing (1) to further protect the casing (1). The protective component includes a connecting cylinder (302) and a drill bit (4). The right end of the connecting cylinder (302) is provided with a through-hole (303). The left end of the drill bit (4) is fixedly provided with an installation rod (401) and the left end of the installation rod (401) is inserted into the through-hole (303). A fixing block (3) is fixedly provided at the right end of the sleeve (1), and a connecting rod (301) is fixedly provided at the right end of the fixing block (3), and a connecting cylinder (302) is fixedly provided at the right end of the connecting rod (301); A fixing rod (5) is fixedly installed on the right wall of the fixing block (3). A moving groove (501) is opened on the outer wall of the fixing rod (5). A locking block (503) is movably engaged in the inner wall of the moving groove (501). An installation groove (402) is opened on the outer wall of the mounting rod (401), and the outer end of the locking block (503) is engaged in the installation groove (402). A push spring (502) is fixedly installed on the inner wall of the inner cavity of the moving groove (501), and the other end of the push spring (502) is fixedly installed on the locking block (503); A fixing plate (304) is fixedly provided on the left wall of the connecting cylinder (302), and a sliding groove (305) is provided on the left wall of the connecting cylinder (302), and a sliding plate (306) is movably engaged with the inner wall of the inner cavity of the sliding groove (305). A compression spring (308) is fixedly installed on the inner wall of the inner cavity of the slide groove (305), and the other end of the compression spring (308) is fixedly installed on the sliding plate (306); A transmission plate (307) is fixedly installed on the left end of the sliding plate (306); An adjusting block (309) is fixedly provided on the outer wall of the sliding plate (306), and a groove is provided on the outer wall of the corresponding connecting rod (301), and the outer wall of the adjusting block (309) is engaged in the groove provided on the outer wall of the corresponding connecting rod (301).

2. The high-efficiency fracturing assembly for multi-stage horizontal wells according to claim 1, characterized in that: The outer wall of the injector (2) is provided with a connecting groove (202), and a baffle (203) is movably inserted into the inner wall of the connecting groove (202). A connecting block (204) is fixedly provided on the outer wall of the baffle (203), and a rotating shaft (205) is fixedly provided on the outer wall of the connecting block (204). The rotating shaft (205) is rotatably inserted into the inner wall of the injector (2).

3. The high-efficiency fracturing assembly for multi-stage horizontal wells according to claim 2, characterized in that: One end of the rotating shaft (205) is fixedly provided with a first connecting plate (206), and a return spring (207) is fixedly provided on the outer wall of the first connecting plate (206). The other end of the return spring (207) is fixedly installed with a second connecting plate (208), and the second connecting plate (208) is fixedly provided in the inner wall of the ejector (2). The ejector (2) moves with the casing (1) to carry out multi-stage modification of the horizontal well.

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