Hydraulic wheel cutting and wheel injection device

Abstract

The present invention relates to a hydraulic wheel sampling and wheel injection device, which comprises an upper joint (1), an upper main body (2), a lower main body (3) and a lower joint (4). The upper joint (1) is axially connected to the upper end of the upper main body (2), the lower end of the upper main body (2) is axially connected to the upper end of the lower main body (3), the lower joint is axially connected to the lower end of the lower main body (3). An upper intermediate sleeve (5) is arranged between the upper joint and the upper main body. An upper sliding sleeve (6) is arranged in the upper intermediate sleeve and the upper main body. A lower sliding sleeve (7) is arranged below the upper sliding sleeve. An inner hydraulic oil hole (72) is arranged on the side wall of the lower sliding sleeve. An outer hydraulic oil hole (31) is arranged on the side wall of the lower main body. A cone valve (8) is arranged at the lower end of the lower sliding sleeve. A rubber cylinder (41) is arranged in the central hole of the lower joint. It is controlled by hydraulic pressure, does not require profile control and sealing tools, test vehicles and test fishing tools, is simple to operate, has high operation reliability and efficiency, and can reduce the operation intensity and save the operation cost.

Description

Technical Field

[0001] The present invention relates to oil tools, and particularly to a hydraulic wheel production and wheel injection device. Background Art

[0002] Before oil production and water injection operations in oil fields, it is necessary to use a test vehicle to deliver a survey and adjustment instrument to the downhole oil production and water injection switches to open each switch. After oil production and water injection are completed, the survey and adjustment instrument is delivered downhole again to close each switch. In this process, test personnel need to use the test vehicle to fish tools, resulting in high labor intensity, a large number of operators, and high operating costs. If the tool falls off during fishing, a fishing tool is also required for fishing. This method has low operating efficiency, cumbersome operation, and a high probability of causing losses.

[0003] Existing hydraulic control devices are easily affected by well depth and well pressure, with unstable operating pressure, which affects the completion of actions. Summary of the Invention

[0004] The purpose of the present invention is to provide a hydraulic wheel production and wheel injection device with simple operation, high reliability and efficiency, low operating cost, and low operating intensity.

[0005] The technical solution of the present invention is as follows: It includes an upper joint, an upper main body, a lower main body, and a lower joint. The upper joint is axially connected to the upper end of the upper main body, the lower end of the upper main body is axially connected to the upper end of the lower main body, and the lower joint is axially connected to the lower end of the lower main body. An upper intermediate sleeve is provided between the upper joint and the upper main body. An upper sliding sleeve is provided inside the upper intermediate sleeve and the upper main body. An outer flange one is provided on the outer wall at the middle section of the upper sliding sleeve. The outer wall of the upper end portion of the upper sliding sleeve is axially slidably and sealingly fitted with the inner wall of the upper intermediate sleeve. The outer wall of the outer flange one is axially slidably and sealingly fitted with the thick inner wall of the upper part of the upper main body. The outer wall of the lower end portion of the upper sliding sleeve is axially slidably and sealingly fitted with the thin inner wall of the upper main body. A lower sliding sleeve located inside the upper main body and the lower main body is provided below the upper sliding sleeve. An outer flange two is provided on the outer wall at the middle upper section of the lower sliding sleeve. The outer wall of the upper end portion of the lower sliding sleeve is axially slidably and sealingly fitted with the thin inner wall of the upper main body. The outer wall of the outer flange two is axially slidably and sealingly fitted with the thick inner wall of the lower part of the upper main body. The outer wall of the lower sliding sleeve below the outer flange two is axially slidably and sealingly fitted with the inner wall of the lower main body. An oil passage one and an oil passage two are axially provided on the side wall of the upper main body. The upper end of the oil passage one is connected to the annular cavity between the upper sliding sleeve and the upper main body above the outer flange one and the lower end is connected to the annular cavity between the lower sliding sleeve and the upper main body above the outer flange two. The upper end of the oil passage two is connected to the annular cavity between the upper sliding sleeve and the upper main body below the outer flange one and the lower end is connected to the annular cavity between the lower sliding sleeve and the upper main body below the outer flange two. A radial inner oil hole is provided on the side wall of the lower sliding sleeve below the outer flange two. An outer oil hole matching the inner oil hole is provided radially on the side wall of the lower main body. A cone valve located inside the lower main body and the lower joint is provided at the lower end portion of the lower sliding sleeve. A rubber cylinder sealingly fitted with the cone valve is provided in the central hole of the lower joint.

[0006] The technical effect of the present invention is as follows: It is controlled hydraulically, without the need for profile control and sealing tools, testing vehicles, and testing fishing tools. The operation is simple, the operation reliability and efficiency are high, and the operation intensity can be reduced and the operation cost can be saved.

[0007] Compared with the prior art, the present device mainly has the following advantages:

[0008] 1. The present device adopts a closed hydraulic operating system, which is an independent system with a constant operating pressure, not affected by the well depth and the liquid pressure in the well, and has strong action reliability.

[0009] 2. It uses hydraulics to control the opening and closing of the wheel injection and wheel production device, without the need for a testing vehicle and testing fishing tools. The operation process is simple, the operation reliability and efficiency are high, and the operation intensity can be reduced and the operation cost can be saved.

[0010] 3. It is simple and reliable to operate. Two soluble balls of different sizes are used. They are respectively dropped into the well, and pressure is applied on the wellhead to rotate and control two layers alternately. When injecting water or producing oil in one layer, the other layer stops injecting water or producing oil. In this way, the purpose of injecting water and producing oil in different layers of the same well and rotating the injection and production of different layers in different periods can be achieved.

[0011] 4. Soluble balls of different diameters can correspond to different injection and production layers, avoiding misjudgment caused by long-term rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is an axial sectional structure diagram of an embodiment of the present invention. EMBODIMENT

[0013] As Figure 1As shown in the figure, it includes an upper joint 1, an upper main body 2, a lower main body 3 and a lower joint 4. The upper joint 1 is axially connected to the upper end of the upper main body 2, the lower end of the upper main body 2 is axially connected to the upper end of the lower main body 3, and the lower joint 4 is axially connected to the lower end of the lower main body 3. An upper intermediate sleeve 5 is provided between the upper joint 1 and the upper main body 2. An upper sliding sleeve 6 is provided in the upper intermediate sleeve 5 and the upper main body 2. An outer flange 61 is provided on the outer wall at the middle section of the upper sliding sleeve 6. The outer wall of the upper end portion of the upper sliding sleeve 6 is in axial sliding and sealing fit with the inner wall of the upper intermediate sleeve 5. The outer wall of the outer flange 61 is in axial sliding and sealing fit with the upper thick inner wall of the upper main body 2. The outer wall of the lower end portion of the upper sliding sleeve 6 is in axial sliding and sealing fit with the thin inner wall of the upper main body 2. A lower sliding sleeve 7 located in the upper main body 2 and the lower main body 3 is provided below the upper sliding sleeve 6. An outer flange 71 is provided on the outer wall at the middle and upper section of the lower sliding sleeve 7. The outer wall of the upper end portion of the lower sliding sleeve 7 is in axial sliding and sealing fit with the thin inner wall of the upper main body 2. The outer wall of the outer flange 71 is in axial sliding and sealing fit with the lower thick inner wall of the upper main body 2. The outer wall of the lower sliding sleeve 7 below the outer flange 71 is in axial sliding and sealing fit with the inner wall of the lower main body 3. An oil passage 21 and an oil passage 22 are axially provided on the side wall of the upper main body 2 respectively. The upper end of the oil passage 21 is communicated with the annular cavity between the upper sliding sleeve 6 and the upper main body 2 above the outer flange 61, and the lower end is communicated with the annular cavity between the lower sliding sleeve 7 and the upper main body 2 above the outer flange 71. The upper end of the oil passage 22 is communicated with the annular cavity between the upper sliding sleeve 6 and the upper main body 2 below the outer flange 61, and the lower end is communicated with the annular cavity between the lower sliding sleeve 7 and the upper main body 2 below the outer flange 71. An inner oil hole 72 is radially provided on the side wall of the lower sliding sleeve 7 below the outer flange 71. An outer oil hole 31 matched with the inner oil hole 72 is radially provided on the side wall of the lower main body 3. A cone valve 8 located in the lower main body 3 and the lower joint 4 is provided at the lower end portion of the lower sliding sleeve 7. A rubber cylinder 41 in sealing fit with the cone valve 8 is provided in the central hole of the lower joint 4.

[0014] The upper joint 1 is axially connected to the upper main body 2 through an upper connecting sleeve 9. The upper connecting sleeve 9 is sleeved outside the upper intermediate sleeve 5 and is in sealing fit with the outer wall of the upper intermediate sleeve 5. The internal thread at the upper end of the upper connecting sleeve 9 is axially connected to the external thread at the lower end of the upper joint 1, and the internal thread at the lower end is axially connected to the external thread at the upper end of the upper main body 2.

[0015] A sealing ring groove is circumferentially provided on the outer wall of the upper joint 1 above the position where it is connected to the upper connecting sleeve 9 by thread. A sealing ring 10 in sealing fit with the inner wall of the upper connecting sleeve 9 is provided in the sealing ring groove. Two sealing ring grooves are circumferentially provided on the outer wall of the upper intermediate sleeve 5. A sealing ring 10 in sealing fit with the inner wall of the upper connecting sleeve 9 is respectively provided in each sealing ring groove. A sealing ring groove is circumferentially provided on the outer wall of the upper main body 2 below the position where it is connected to the upper connecting sleeve 9 by thread. A sealing ring 10 in sealing fit with the inner wall of the upper connecting sleeve 9 is provided in the sealing ring groove.

[0016] On the outer wall of the upper end portion of the upper sliding sleeve 6, two sealing ring grooves are circumferentially provided. In each sealing ring groove, a sealing ring 10 that is hermetically fitted with the inner wall of the upper intermediate sleeve 5 is respectively provided. On the outer wall of the first outer flange 61, two sealing ring grooves are circumferentially provided. In each sealing ring groove, a sealing ring 10 that is hermetically fitted with the thick inner wall of the upper part of the upper main body 2 is respectively provided. On the outer wall of the lower end portion of the upper sliding sleeve 6, two sealing ring grooves are circumferentially provided. In each sealing ring groove, a sealing ring 10 that is hermetically fitted with the thin inner wall of the upper main body 2 is respectively provided.

[0017] The upper main body 2 is axially connected to the lower main body 3 through the middle connecting sleeve 11. The internal thread at the upper end of the middle connecting sleeve 11 is axially connected to the external thread at the lower end of the upper main body 2, and the internal thread at the lower end of the middle connecting sleeve 11 is axially connected to the external thread at the upper end of the lower main body 3.

[0018] On the outer wall of the upper main body 2 above the position where it is connected to the middle connecting sleeve 11 by thread, a sealing ring groove is circumferentially provided. In the sealing ring groove, a sealing ring 10 that is hermetically fitted with the inner wall of the middle connecting sleeve 11 is provided. On the outer wall of the lower main body 3 below the position where it is connected to the middle connecting sleeve 11 by thread, a sealing ring groove is circumferentially provided. In the sealing ring groove, a sealing ring 10 that is hermetically fitted with the inner wall of the middle connecting sleeve 11 is provided.

[0019] On the outer wall of the upper end portion of the lower sliding sleeve 7, two sealing ring grooves are circumferentially provided. In each sealing ring groove, a sealing ring 10 that is hermetically fitted with the thin inner wall of the upper main body 2 is respectively provided. On the outer wall of the second outer flange 71, two sealing ring grooves are circumferentially provided. In each sealing ring groove, a sealing ring 10 that is hermetically fitted with the thick inner wall of the lower part of the upper main body 2 is respectively provided. On the outer wall of the lower sliding sleeve 7 above the internal oil hole 72, two sealing ring grooves are circumferentially provided. In each sealing ring groove, a sealing ring 10 that is hermetically fitted with the inner wall of the lower main body 3 is respectively provided. On the outer wall of the lower sliding sleeve 7 near the internal oil hole 72 below the internal oil hole 72, a sealing ring groove is circumferentially provided. In the sealing ring groove, a sealing ring 10 that is hermetically fitted with the inner wall of the lower main body 3 is provided. On the outer wall of the lower sliding sleeve 7 far from the internal oil hole 72 below the internal oil hole 72, two sealing ring grooves are circumferentially provided. In each sealing ring groove, a sealing ring 10 that is hermetically fitted with the inner wall of the lower main body 3 is respectively provided.

[0020] The lower main body 3 is axially connected to the lower joint 4 through the lower connecting sleeve 12. The internal thread at the upper end of the lower connecting sleeve 12 is axially connected to the external thread at the lower end of the lower main body 3, and the internal thread at the lower end of the lower connecting sleeve 12 is axially connected to the external thread at the upper end of the lower joint 4.

[0021] On the outer wall of the lower main body 3 above the position where it is connected to the lower connecting sleeve 12 by thread, a sealing ring groove is circumferentially provided. In the sealing ring groove, a sealing ring 10 that is hermetically fitted with the inner wall of the lower connecting sleeve 12 is provided. On the outer wall of the lower joint 4 below the position where it is connected to the lower connecting sleeve 12 by thread, a sealing ring groove is circumferentially provided. In the sealing ring groove, a sealing ring 10 that is hermetically fitted with the inner wall of the lower connecting sleeve 12 is provided.

[0022] Above the lower joint 4, there are an upper compression spring 32 and a tapered ring 33 that are successively sleeved on the outside of the lower end of the lower body 3 from bottom to top. The lower end of the upper compression spring 32 is matched with the upper end surface of the lower joint 4, and the upper end is sleeved on the outside of the lower end of the tapered ring 33 and is matched with the middle end surface of the tapered ring 33 facing downward. On the side wall of the lower body 3 at the position corresponding to the inner tapered surface at the upper mouth of the tapered ring 33, there are several ball holes 34 circumferentially arranged. Each ball hole 34 is respectively provided with a ball 35. On the outer wall of the upper and lower limit positions where the sliding sleeve 7 is matched with the ball 35, there is a ball groove 73 circumferentially arranged.

[0023] When the sliding sleeve 7 slides to the upper and lower limit positions, the ball groove 73 is matched with the ball 35. Before the sliding sleeve 7 slides downward and upward, it is necessary to overcome the elastic locking force of the ball 35 by the tapered ring 33 and the upper compression spring 32, so as to play a positioning and locking role for the sliding sleeve 7 and prevent the sliding sleeve 7 from sliding abnormally.

[0024] The upper compression spring 32 and the tapered ring 33 are respectively located inside the lower connecting sleeve 12.

[0025] Each external oil hole 31 is respectively located radially on the side wall of the lower body 3 between the lower end of the middle connecting sleeve 11 and the upper end of the lower connecting sleeve 12.

[0026] The tapered valve 8 is composed of a tapered valve outer sleeve 81, a tapered valve body 82, a lower compression spring 83 and a nut 84. The internal thread at the upper end of the tapered valve outer sleeve 81 is axially connected to the external thread at the lower end of the sliding sleeve 7. The outer wall of the tapered valve outer sleeve 81 is axially slidably sealed with the inner wall of the lower joint 4. There is an inner flange 85 on the inner wall of the lower end of the tapered valve outer sleeve 81. There is an outer flange 86 on the outer wall of the upper end of the tapered valve body 82. The upper end of the tapered valve body 82 is sleeved inside the lower end of the tapered valve outer sleeve 81 and is axially slidably matched with the tapered valve outer sleeve 81. The inner wall of the inner flange 85 is axially slidably matched with the outer wall of the tapered valve body 82 below the outer flange 86. The outer wall of the outer flange 86 is axially slidably matched with the inner wall of the tapered valve outer sleeve 81 above the inner flange 85. The lower compression spring 83 is located below the tapered valve outer sleeve 81 and is sleeved on the outside of the tapered valve body 82. The nut 84 is located below the lower compression spring 83 and is installed on the outer wall of the tapered valve body 82 by thread. The upper end of the lower compression spring 83 is matched with the lower end surface of the tapered valve outer sleeve 81, and the lower end is matched with the upper end surface of the nut 84.

[0027] On the outer wall above the position where the sliding sleeve 7 is connected to the tapered valve outer sleeve 81 by thread, there is a sealing ring groove circumferentially arranged. Inside the sealing ring groove, there is a sealing ring 10 that is hermetically matched with the inner wall of the tapered valve outer sleeve 81. On the outer wall of the lower end of the tapered valve outer sleeve 81, there are two sealing ring grooves circumferentially arranged. Each sealing ring groove is respectively provided with a sealing ring 10 that is hermetically matched with the inner wall of the lower joint 4.

[0028] The lower end of the cone valve body 82 is provided with a tapered valve head 87 that is thick at the top and thin at the bottom and is matched with the rubber cylinder 41. A number of flow holes 88 that communicate the inner and outer walls of the cone valve body 82 are circumferentially provided on the side wall of the cone valve body 82 between the tapered valve head 87 and the nut 84. A flow groove 42 is circumferentially provided on the inner wall of the lower joint 4 at the position matched with the flow holes 88.

[0029] Under the action of the lower compression spring 83, the cone valve body 82 can ensure reliable sealing with the rubber cylinder 41. When the pressure below the rubber cylinder 41 is too high, it also has the function of upwardly compressing the cone valve body 82 to relieve pressure.

[0030] The rubber cylinder 41 is installed from bottom to top in the central hole of the lower joint 4. The upper end face of the rubber cylinder 41 is matched with the inner end face of the lower joint 4 facing downward, and the outer wall is matched with the inner wall of the lower joint 4. A pressure sleeve 43 is provided below the rubber cylinder 41. The external thread on the outer wall of the lower half section of the pressure sleeve 43 is installed on the internal thread on the central hole of the lower joint 4. The upper end face of the pressure sleeve 43 is matched with the lower end face of the rubber cylinder 41 to install the rubber cylinder 41 in the lower joint 4.

[0031] An internal thread 13 for pipe string connection is provided in the central hole at the upper end of the upper joint 1, and an external thread 44 for pipe string connection is provided on the outer wall at the lower end of the lower joint 4.

[0032] The inner diameter of the upper joint 1 and the inner diameter of the upper intermediate sleeve 5 are larger than the inner diameter of the upper sliding sleeve 6, and the inner diameter of the upper sliding sleeve 6 is larger than the inner diameter of the lower sliding sleeve 7. So that the large ball can pass through the inner holes of the upper joint 1 and the upper intermediate sleeve 5 to reach the upper end of the upper sliding sleeve 6 to block the central hole of the upper sliding sleeve 6, and the small ball can pass through the inner hole of the upper sliding sleeve 6 to reach the upper end of the lower sliding sleeve 7 to block the central hole of the lower sliding sleeve 7.

[0033] Working principle:

[0034] When this device is in use, it is connected to a packer at the lower end. By controlling the alternate opening and closing of the side oil passage and the upper and lower oil passages, water injection and oil production are alternately carried out for the intervals above and below the packer to achieve the purpose of alternate oil production and injection.

[0035] This device adopts hydraulic control. The annular cavity between the upper sliding sleeve 6 above the outer flange 61 and the upper body 2 is connected and filled with hydraulic oil through the oil passage 21 to the annular cavity between the lower sliding sleeve 7 above the outer flange 71 and the upper body 2. The annular cavity between the upper sliding sleeve 6 below the outer flange 61 and the upper body 2 is connected and filled with hydraulic oil through the oil passage 22 to the annular cavity between the lower sliding sleeve 7 below the outer flange 71 and the upper body 2. By controlling the simultaneous movement of the upper sliding sleeve 6 and the lower sliding sleeve 6, the transformation of the oil passage is realized.

[0036] After a large ball is dropped into the wellhead, the central hole of the upper sliding sleeve 6 is blocked, and pressure is applied from the wellhead to push the upper sliding sleeve 6 downward. While the upper sliding sleeve 6 moves downward, the hydraulic oil in the annular cavity below the upper sliding sleeve 6 enters the annular cavity below the lower sliding sleeve 7, causing the lower sliding sleeve 7 to move upward, resulting in the misalignment of the inner oil hole 72 on the lower sliding sleeve 7 and the outer oil hole 31 on the lower main body 3, closing the side oil passage between the inner hole of the device and the outside of the device. While the lower sliding sleeve 7 moves upward, it drives the cone valve 8 at the lower end of the lower sliding sleeve 7 to move upward, separating the cone valve 8 from the rubber cylinder 41 up and down, and opening the upper and lower oil passages in the inner hole of the device.

[0037] After a small ball is dropped into the wellhead, the central hole of the lower sliding sleeve 7 is blocked, and pressure is applied from the wellhead to push the lower sliding sleeve 7 downward. While the lower sliding sleeve 7 moves downward, the hydraulic oil in the annular cavity below the lower sliding sleeve 7 enters the annular cavity below the upper sliding sleeve 6, causing the upper sliding sleeve 6 to move upward. The downward movement of the lower sliding sleeve 7 causes the inner oil hole 72 on the lower sliding sleeve 7 to communicate with the outer oil hole 31 on the lower main body 3, opening the side oil passage between the inner hole of the device and the outside of the device. While the lower sliding sleeve 7 moves downward, it drives the cone valve 8 at the lower end of the lower sliding sleeve 7 to move downward, blocking the central hole of the rubber cylinder 41 and closing the upper and lower oil passages in the inner hole of the device.

[0038] The control of this device is simple and it is convenient to use. Both the large ball and the small ball are made of soluble materials and will dissolve automatically underground after the blocking task is completed, without affecting subsequent operations.

Claims

1. Hydraulic wheel mining and wheel injection device, which comprises an upper joint (1), an upper main body (2), a lower main body (3) and a lower joint (4). The upper joint (1) is axially connected to the upper end of the upper main body (2), the lower end of the upper main body (2) is axially connected to the upper end of the lower main body (3), and the lower joint (4) is axially connected to the lower end of the lower main body (3). It is characterized in that: An upper intermediate sleeve (5) is provided between the upper joint (1) and the upper main body (2). An upper sliding sleeve (6) is provided inside the upper intermediate sleeve (5) and the upper main body (2). An outer flange one (61) is provided on the outer wall at the middle section of the upper sliding sleeve (6). The outer wall of the upper end of the upper sliding sleeve (6) is in axial sliding sealing fit with the inner wall of the upper intermediate sleeve (5). The outer wall of the outer flange one (61) is in axial sliding sealing fit with the upper thick inner wall of the upper main body (2). The outer wall of the lower end of the upper sliding sleeve (6) is in axial sliding sealing fit with the thin inner wall of the upper main body (2). A lower sliding sleeve (7) located inside the upper main body (2) and the lower main body (3) is provided below the upper sliding sleeve (6). An outer flange two (71) is provided on the outer wall at the middle and upper section of the lower sliding sleeve (7). The outer wall of the upper end of the lower sliding sleeve (7) is in axial sliding sealing fit with the thin inner wall of the upper main body (2). The outer wall of the outer flange two (71) is in axial sliding sealing fit with the lower thick inner wall of the upper main body (2). The outer wall of the lower sliding sleeve (7) below the outer flange two (71) is in axial sliding sealing fit with the inner wall of the lower main body (3). An oil passage one (21) and an oil passage two (22) are axially provided on the side wall of the upper main body (2). The upper end of the oil passage one (21) is communicated with the annular cavity between the upper sliding sleeve (6) and the upper main body (2) above the outer flange one (61), and the lower end is communicated with the annular cavity between the lower sliding sleeve (7) and the upper main body (2) above the outer flange two (71). The upper end of the oil passage two (22) is communicated with the annular cavity between the upper sliding sleeve (6) and the upper main body (2) below the outer flange one (61), and the lower end is communicated with the annular cavity between the lower sliding sleeve (7) and the upper main body (2) below the outer flange two (71). An inner oil hole (72) is radially provided on the side wall of the lower sliding sleeve (7) below the outer flange two (71). An outer oil hole (31) communicated with the inner oil hole (72) when the lower sliding sleeve (7) descends to the lower limit position is radially provided on the side wall of the lower main body (3). A cone valve (8) located inside the lower main body (3) and the lower joint (4) is provided at the lower end of the lower sliding sleeve (7). A rubber cylinder (41) sealingly matched with the cone valve (8) when the lower sliding sleeve (7) descends to the lower limit position is provided in the central hole of the lower joint (4).

2. The hydraulic wheel mining and wheel injection device according to claim 1, characterized in that The upper joint (1) is axially connected to the upper main body (2) through an upper connecting sleeve (9). The upper connecting sleeve (9) is sleeved outside the upper intermediate sleeve (5) and is in sealing fit with the outer wall of the upper intermediate sleeve (5). The internal thread at the upper end of the upper connecting sleeve (9) is axially connected to the external thread at the lower end of the upper joint (1), and the internal thread at the lower end is axially connected to the external thread at the upper end of the upper main body (2).

3. The hydraulic wheel mining and wheel injection device according to claim 1, characterized in that On the outer wall of the upper end portion of the upper sliding sleeve (6), there are two circumferential sealing ring grooves. In each sealing ring groove, there is a sealing ring (10) that is in sealing cooperation with the inner wall of the upper intermediate sleeve (5). On the outer wall of the first outer flange (61), there are two circumferential sealing ring grooves. In each sealing ring groove, there is a sealing ring (10) that is in sealing cooperation with the thick inner wall of the upper part of the upper main body (2). On the outer wall of the lower end portion of the upper sliding sleeve (6), there are two circumferential sealing ring grooves. In each sealing ring groove, there is a sealing ring (10) that is in sealing cooperation with the thin inner wall of the upper main body (2).

4. The hydraulic wheel mining and wheel injection device according to claim 1, wherein The upper main body (2) is axially connected to the lower main body (3) through the middle connecting sleeve (11). The internal thread at the upper end of the middle connecting sleeve (11) is axially connected to the external thread at the lower end of the upper main body (2), and the internal thread at the lower end of the middle connecting sleeve (11) is axially connected to the external thread at the upper end of the lower main body (3).

5. The hydraulic wheel cutting and wheel injection device according to claim 1, characterized in that On the outer wall of the upper end portion of the lower sliding sleeve (7), there are two circumferential sealing ring grooves. In each sealing ring groove, there is a sealing ring (10) that is in sealing cooperation with the thin inner wall of the upper main body (2). On the outer wall of the second outer flange (71), there are two circumferential sealing ring grooves. In each sealing ring groove, there is a sealing ring (10) that is in sealing cooperation with the thick inner wall of the lower part of the upper main body (2). On the outer wall of the lower sliding sleeve (7) above the internal oil hole (72), there are two circumferential sealing ring grooves. In each sealing ring groove, there is a sealing ring (10) that is in sealing cooperation with the inner wall of the lower main body (3). On the outer wall of the lower sliding sleeve (7) near the internal oil hole (72) below the internal oil hole (72), there is a sealing ring groove, and in the sealing ring groove, there is a sealing ring (10) that is in sealing cooperation with the inner wall of the lower main body (3). On the outer wall of the lower sliding sleeve (7) far from the internal oil hole (72) below the internal oil hole (72), there are two circumferential sealing ring grooves. In each sealing ring groove, there is a sealing ring (10) that is in sealing cooperation with the inner wall of the lower main body (3).

6. The hydraulic wheel mining and wheel injection device according to claim 1, characterized in that The lower main body (3) is axially connected to the lower joint (4) through the lower connecting sleeve (12). The internal thread at the upper end of the lower connecting sleeve (12) is axially connected to the external thread at the lower end of the lower main body (3), and the internal thread at the lower end of the lower connecting sleeve (12) is axially connected to the external thread at the upper end of the lower joint (4).

7. The hydraulic wheel cutting and wheel injection device according to claim 1, characterized in that Above the lower joint (4), there are an upper compression spring (32) and a tapered ring (33) that are sleeved on the outside of the lower end of the lower main body (3) in sequence from bottom to top. The lower end of the upper compression spring (32) is in cooperation with the upper end face of the lower joint (4), and the upper end is sleeved on the outside of the lower end of the tapered ring (33) and is in cooperation with the middle end face of the tapered ring (33) facing downward. On the circumferential side wall of the lower main body (3) at the corresponding position of the inner tapered surface at the upper opening position of the tapered ring (33), there are a number of steel ball holes (34). In each steel ball hole (34), there is a steel ball (35). On the outer wall of the lower sliding sleeve (7) at the upper limit position and the lower limit position in cooperation with the steel ball (35), there is a steel ball groove (73) respectively.

8. The hydraulic wheel cutting and wheel injection device according to claim 1, characterized in that The poppet valve (8) is composed of a poppet valve outer sleeve (81), a poppet valve body (82), a lower compression spring (83) and a nut (84). The internal thread at the upper end of the poppet valve outer sleeve (81) is axially connected to the external thread at the lower end of the lower sliding sleeve (7). The outer wall of the poppet valve outer sleeve (81) is axially slidably and sealingly fitted with the inner wall of the lower joint (4). An inner flange (85) is provided on the inner wall of the lower end portion of the poppet valve outer sleeve (81). An outer flange (86) is provided on the outer wall of the upper end portion of the poppet valve body (82). The upper end of the poppet valve body (82) is sleeved inside the lower end of the poppet valve outer sleeve (81) and is axially slidably fitted with the poppet valve outer sleeve (81). The inner wall of the inner flange (85) is axially slidably fitted with the outer wall of the poppet valve body (82) below the outer flange (86). The outer wall of the outer flange (86) is axially slidably fitted with the inner wall of the poppet valve outer sleeve (81) above the inner flange (85). The lower compression spring (83) is located below the poppet valve outer sleeve (81) and is sleeved outside the poppet valve body (82). The nut (84) is located below the lower compression spring (83) and is installed on the outer wall of the poppet valve body (82) by means of a thread. The upper end of the lower compression spring (83) is fitted with the lower end face of the poppet valve outer sleeve (81), and the lower end is fitted with the upper end face of the nut (84).

9. The hydraulic wheel mining and wheel injection device according to claim 8, characterized in that A tapered valve head (87) with a thick upper part and a thin lower part, which is fitted with the rubber cylinder (41), is provided at the lower end portion of the poppet valve body (82). A plurality of flow holes (88) communicating the inner and outer walls of the poppet valve body (82) are circumferentially provided on the side wall of the poppet valve body (82) between the tapered valve head (87) and the nut (84). A flow groove (42) is circumferentially provided on the inner wall of the lower joint (4) at the position fitted with the flow holes (88).

10. The hydraulic wheel cutting and wheel injection device according to claim 1, characterized in that The rubber cylinder (41) is installed from bottom to top in the central hole of the lower joint (4). The upper end face of the rubber cylinder (41) is fitted with the inner end face of the lower joint (4) facing downward, and the outer wall is fitted with the inner wall of the lower joint (4). A pressure sleeve (43) is provided below the rubber cylinder (41). The external thread on the outer wall of the lower half section of the pressure sleeve (43) is installed on the internal thread on the central hole of the lower joint (4). The upper end face of the pressure sleeve (43) is fitted with the lower end face of the rubber cylinder (41) to install the rubber cylinder (41) in the lower joint (4).

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