Hydraulic type sand-containing oil-gas mixed transportation supercharging device

Abstract

The invention relates to the technical field of oil-gas mixed transportation, in particular to a hydraulic type sand-containing oil-gas mixed transportation supercharging device. Comprising a mounting frame, a hydraulic system, a liquid inlet pipeline, a liquid outlet pipeline and a supercharger are mounted on the mounting frame, the supercharger is fixedly connected and communicated with multiple sets of connecting shells distributed at intervals, fixing shells are fixedly connected into the connecting shells, the fixing shells are slidably connected with sliding parts, and reset tension springs are mounted between the fixing shells and the sliding parts; the axis of the connecting shell is in a vertical state, the side, away from the fixed shell, of the sliding piece is rotationally connected with a plugging piece, and a plugging part is fixedly connected to the plugging piece. When sealing between the plugging part and the connecting shell is relieved, the plugging part is actively controlled to rotate, so that the plugging part rotates to the position where the plugging part is not prone to being directly impacted by gravel in mining fluid, the probability that the plugging part is impacted and abraded by the sand-containing mining fluid is reduced, and the service life of the plugging part is greatly prolonged; therefore, the working reliability of the device in a severe environment is improved.

Description

Technical Field

[0001] This invention relates to the field of oil and gas mixed transportation technology, and specifically to a hydraulic sand-containing oil and gas mixed transportation booster device. Background Technology

[0002] In the mid-to-late stages of oilfield development, oil wells are located further and further from the combined station, and the gathering and transportation radius becomes larger. Therefore, existing wellhead booster units are needed to pressurize crude oil produced from different wells and transport it to a unified location for centralized oil and gas separation and storage. Because the content of wastewater, natural gas, carbon dioxide, and gravel in the production fluids changes continuously during the extraction process, the quality requirements for existing wellhead booster units are gradually increasing. Commonly used booster units such as screw pumps, compressors, and centrifugal pumps are becoming increasingly inadequate for current production needs. Therefore, a hydraulically driven booster system is required. The hydraulic oil-gas mixed-transport booster unit has emerged to address this issue. This unit uses hydraulically driven double-headed push rods to reciprocate, continuously drawing in and discharging high-pressure production fluid containing oil, gas, and sand through its internal check valve assembly. This unit features high wear resistance, high output pressure, large volume, and suitability for transporting oil and water with high gas and sand content. However, its crucial check valve assembly is susceptible to wear and tear from the impact of sand-containing production fluid, making it the most vulnerable part of the unit. Once the sealing performance of the check valve assembly deteriorates due to wear, the working performance of the hydraulic oil-gas mixed-transport booster unit will decrease significantly, the output pressure will drop, and the production efficiency of the oil well will be severely affected. Summary of the Invention

[0003] In order to overcome the shortcomings of existing hydraulic oil-gas mixed transport booster devices where the one-way valve is easily impacted by sand-containing oil and gas, resulting in wear and reduced sealing performance, this invention provides a hydraulic sand-containing oil-gas mixed transport booster device.

[0004] The technical solution is as follows: A hydraulic sand-containing oil-gas mixed transportation booster device includes a mounting frame, on which a hydraulic system, an inlet pipe, an outlet pipe, and a booster are mounted. A sliding plug is slidably connected inside the booster. The hydraulic system is connected to the booster. Multiple sets of connecting shells are fixedly connected and connected to the booster at intervals. Each set of connecting shells consists of two shells. The two connecting shells in the same set are respectively connected to the inlet pipe and the outlet pipe. A fixed shell is fixedly connected inside the connecting shell. A sliding member is slidably connected to the fixed shell, and a return spring is installed between the two. The axis of the connecting shell is vertical. A sealing member is rotatably connected to the side of the sliding member away from the fixed shell. The sealing member has a spherical surface and a sealing part is provided on the sealing member. The sealing part is squeezed and sealed with the connecting shell. A rotating mechanism is provided on the connecting shell for driving the sealing member to rotate, so that the sealing part avoids the impact of sand and gravel.

[0005] Furthermore, the rotating mechanism includes a hydraulic push rod, which is fixed to the connecting shell. A connecting rod is hinged to the telescopic end of the hydraulic push rod, and the connecting rod is hinged to the sealing member. The connecting rod is located on the side of the telescopic end of the hydraulic push rod away from the fixed part of the hydraulic push rod.

[0006] Furthermore, the sealing component is provided with a liquid-guiding slope, which is located on the side of the sealing component near the connecting rod.

[0007] Furthermore, a protective groove is provided in the middle of the liquid guiding slope, and the hinge joint between the connecting rod and the sealing component is located in the protective groove.

[0008] Furthermore, a flow restrictor is fixed to the side of the connecting shell near the hydraulic push rod, and the flow restrictor is located above the hydraulic push rod.

[0009] Furthermore, the side of the sealing portion away from the sealing member is a spherical surface, the radius of the sphere on the sealing portion is greater than the radius of the sphere on the sealing member, and the two spherical surfaces are connected to each other.

[0010] Furthermore, a sliding ring is slidably connected above the joint between the connecting shell and the sealing part. The maximum diameter of the sliding ring is greater than the minimum diameter of the joint between the connecting shell and the sealing part. A guide filter is fixedly connected to the lower side of the sliding ring. The cross-section of the guide filter is circular, and its maximum diameter is smaller than the minimum diameter of the joint between the connecting shell and the sealing part. When the sealing part is pressed and sealed with the connecting shell, the guide filter contacts the sealing part.

[0011] Furthermore, the center of the circle containing the cross-section of the guide filter gradually tilts from top to bottom away from the hydraulic push rod.

[0012] Furthermore, the fixed shell and the sliding member together form a cleaning cavity. A first filter screen is fixedly connected to the lower side of the sliding member. A one-way valve is installed inside the fixed shell on the sliding member. The cleaning cavity is connected to the connecting shell through the first filter screen and the one-way valve. Symmetrically distributed fixed blocks are fixedly connected to the sliding member. The fixed blocks and the sliding member are jointly provided with a drainage channel. The drainage channel is connected to both the cleaning cavity and the connecting shell. The outlet of the drainage channel on the fixed block is located above the sealing member. A sealing block for sealing itself is slidably connected to the outlet position of the drainage channel on the fixed block, and an elastic member is provided between the two.

[0013] Furthermore, the contact position between the sealing block and the adjacent drainage channel is a frustum, and a second filter screen is fixedly connected to the sealing block, with the second filter screen located outside the drainage channel.

[0014] Compared with the prior art, the beneficial effects of the present invention are at least as follows: 1. When the sealing part is released from the seal with the connecting shell, the present invention actively controls the rotation of the sealing part, so that the sealing part is rotated to a position that is not easily impacted by the sand and gravel in the mining fluid, thereby reducing the probability of the sealing part being impacted and worn by the sand-containing mining fluid, greatly extending the service life of the sealing part, and thus increasing the reliability of the device in harsh environments.

[0015] 2. This invention limits the shape of the sealing component and, in conjunction with the flow limiting component, limits the flow direction of the extraction fluid within the connecting shell, thereby reducing the probability of gravel in the extraction fluid abrading the sealing part.

[0016] 3. This invention intercepts and guides the sand and gravel in the mining fluid by inserting a guide filter into the joint between the connecting shell and the sealing part to squeeze and seal the joint. This reduces the probability of sand and gravel causing wear on the joint between the connecting shell and the sealing part, and also reduces the probability of sand and gravel flowing between the sealing part and the flow restriction part, causing wear on the sealing part.

[0017] 4. This invention utilizes the movement of the sliding member to collect the cleaning fluid when the sliding member, sealing member, and sealing part are opened and closed. The cleaning fluid is then used to backflush the connection shell and the sealing part to compress the seal, reducing the probability of gravel being trapped between the connection shell and the sealing part and maintaining the performance of the device. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a cross-sectional view of the turbocharger of the present invention; Figure 3 This is a three-dimensional structural diagram of the turbocharger and connecting housing of the present invention; Figure 4 This is a cross-sectional view of the connecting shell of the present invention; Figure 5 This is a cross-sectional view of the connecting shell and the fixing shell of the present invention; Figure 6 This is a cross-sectional view of the sealing element and sealing portion of the present invention; Figure 7 This is a schematic diagram of the sealing component of the present invention in its rotated open state; Figure 8 This is a three-dimensional structural diagram of the sliding component and drainage channel of the present invention; Figure 9 This is a cross-sectional view of the sealing block and the second filter screen of the present invention.

[0019] Reference numerals: 1: Mounting bracket, 101: Hydraulic system, 102: Inlet pipe, 103: Outlet pipe, 2: Intensifier, 201: Left chamber 1, 202: Left chamber 2, 203: Right chamber 1, 204: Right chamber 2, 205: Left hydraulic chamber, 206: Right hydraulic chamber, 3: Sliding plug, 4: Connecting shell, 5: Fixed shell, 6: Sliding component, 601: Drainage channel, 61: Reset spring, 62: First filter screen, 63: One-way valve, 7: Sealing component, 71: Sealing part, 72: Liquid guiding slope, 73: Protective groove, 74: Flow limiting component, 8: Hydraulic push rod, 9: Connecting rod, 10: Sliding ring, 11: Guide filter screen, 12: Fixed block, 13: Sealing block, 14: Second filter screen. Detailed Implementation

[0020] The invention will now be described more fully below with reference to the accompanying drawings, in which presently preferred embodiments of the invention are illustrated. However, the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided for thoroughness and completeness and to fully convey the scope of the invention to those skilled in the art.

[0021] Example 1: This example discloses a hydraulic sand-containing oil-gas mixed transport booster device, which is used to overcome the shortcomings of the existing hydraulic oil-gas mixed transport booster device where the one-way valve is easily impacted by sand-containing oil and gas, resulting in wear and a decrease in sealing performance.

[0022] Reference Figures 1-7 A hydraulic sand-containing oil-gas mixed transport booster device includes a mounting frame 1. The mounting frame 1 is equipped with a hydraulic system 101, an inlet pipe 102, an outlet pipe 103, a control terminal, and multiple boosters 2 spaced apart. A sliding plug 3 is slidably connected inside each booster 2, dividing the booster 2 into at least six cavities: a left first chamber 201, a left second chamber 202, a right first chamber 203, a right second chamber 204, a left hydraulic chamber 205, and a right hydraulic chamber 206 (see reference). Figure 2As shown in the diagram, the left chamber 201, left chamber 202, right chamber 203, and right chamber 204 are the working cavities for oil-gas pressurization. The left hydraulic chamber 205 and right hydraulic chamber 206 are the hydraulic drive cavities. By sequentially injecting hydraulic oil into the left hydraulic chamber 205 and right hydraulic chamber 206, the sliding plug 3 is controlled to slide back and forth within the booster 2. Both the left hydraulic chamber 205 and right hydraulic chamber 206 are connected to the hydraulic system 101. The booster 2 is fixedly connected to and connected to four sets of connecting shells 4 spaced apart (the number of sets of connecting shells 4 changes with the number of working cavities). Each set of connecting shells 4 consists of two parts, one upper and one lower. The four sets of connecting shells 4 correspond one-to-one with the left chamber 201, left chamber 202, right chamber 203, and right chamber 204. The upper connecting shell 4 within each set of connecting shells 4 is connected to the inlet pipe 102, and the lower connecting shell 4 within each set of connecting shells 4 is connected to the outlet pipe 103. A fixed shell 5 is fixedly connected, and a sliding member 6 is slidably connected to the fixed shell 5. A return spring 61 is installed between the two. The axis of the connecting shell 4 is vertical. A sealing member 7 is rotatably connected to the upper side of the sliding member 6. The sealing member 7 has a spherical surface. A sealing part 71 is provided on the upper side of the sealing member 7. The sealing part 71 is squeezed and sealed with the connecting shell 4. The side of the sealing part 71 away from the sealing member 7 is a spherical surface. The radius of the sphere on the sealing part 71 is larger than the radius of the sphere on the sealing member 7. The spherical surfaces of the two are connected to each other. Therefore, when the sealing part 71 is squeezed and contacted with the connecting shell 4, even if the sealing part 71 has not yet rotated to the top of the sealing member 7, the sealing part 71 will accelerate to rotate to the top of the sealing member 7 due to the squeezing force. The connecting shell 4 is provided with a rotating mechanism for driving the sealing member 7 to rotate so that the sealing part 71 avoids the impact of gravel. The hydraulic system 101 and the rotating mechanism are both electrically connected to the control terminal.

[0023] In the above scheme, the hydraulic system 101, the inlet pipe 102, and the outlet pipe 103 are all equipped with multiple valves, which can be individually disconnected from any one of the boosters 2. Therefore, when a single booster 2 fails, it is only necessary to close the connection between the hydraulic system 101, the inlet pipe 102, and the outlet pipe 103 and the booster 2 through the valves to repair the single booster 2. This will not affect other boosters 2. Because the reset spring 61 in this device is located on the lower side of the fixed shell 5, the fixed shell 5 can effectively protect the reset spring 61 and prevent it from being impacted by gravel in the mining fluid.

[0024] Furthermore, referring to Figures 4-7 The rotating mechanism includes a hydraulic push rod 8, which is fixed to the lower part of the connecting shell 4. The telescopic end of the hydraulic push rod 8 is located inside the connecting shell 4 and is hinged to a connecting rod 9. The connecting rod 9 is hinged to the sealing member 7, and the entire connecting rod 9 is located on the right side of the adjacent hydraulic push rod 8. The sealing member 7 is provided with a liquid-guiding inclined surface 72, which is located on the side of the sealing member 7 closest to the connecting rod 9. (Reference) Figure 7When the sealing component 7 rotates, the liquid guiding slope 72 is located on the left side of the sealing component 7, and the sealing component 7 gradually tilts to the right from top to bottom. A protective groove 73 is provided in the middle of the liquid guiding slope 72. The hinge of the connecting rod 9 and the sealing component 7 is located in the protective groove 73, which is used to reduce the probability of the connecting rod 9 and the sealing component 7 being impacted by gravel at the rotating connection. A flow limiting component 74 is fixedly connected to the side of the connecting shell 4 near the hydraulic push rod 8. The flow limiting component 74 is located above the hydraulic push rod 8, which is used to reduce the liquid flow area at the sealing part 71 after rotation. The hydraulic push rod 8 is connected to the hydraulic system 101.

[0025] In the above scheme, after the sealing component 7 rotates, refer to Figure 7 Both the hydraulic push rod 8 and the sealing part 71 are located on the right side of the liquid inlet slope 72. Most of the extraction fluid flows to the left side of the sealing part 7 under the action of the flow limiting component 74 and the liquid inlet slope 72. Therefore, the sealing part 7 can effectively protect the hydraulic push rod 8 and the sealing part 71, reduce the probability of the hydraulic push rod 8 and the sealing part 71 being impacted by sand and gravel in the extraction fluid, thereby reducing the wear of the hydraulic push rod 8 and the sealing part 71 and reducing the probability that the performance of the device will be affected by wear.

[0026] The working principle of the above scheme is as follows: After the equipment is installed at the wellhead, the operator starts the hydraulic system 101 via the control terminal. The hydraulic system 101 injects hydraulic oil into the left hydraulic chamber 205 and the right hydraulic chamber 206, causing the sliding plug 3 to move back and forth. This continuously operates the left chamber 201, left second chamber 202, right chamber 203, and right second chamber 204, drawing production fluid from the well through the inlet pipe 102 and discharging it under high pressure through the outlet pipe 103. For ease of description, the following example illustrates the process of the hydraulic system 101 injecting hydraulic oil into the left hydraulic chamber 205, causing the sliding plug 3 to move to the right. At this time, the hydraulic oil in the right hydraulic chamber 206 naturally drains back into the hydraulic system 101, and the left chamber 201 and right chamber 203... The inlet pipe 102 draws production fluid from the well. The production fluid in the left second chamber 202 and right second chamber 204 is squeezed by the sliding plug 3 and flows towards the outlet pipe 103. At this time, the sliding parts 6 and sealing parts 7 in the upper connecting shell 4 of the left first chamber 201 and right first chamber 203 move downward and open under the pressure of the production fluid. The sliding parts 6 and sealing parts 7 in the lower connecting shell 4 of the left second chamber 202 and right second chamber 204 move downward and open under the pressure of the production fluid. The adjacent reset spring 61 is stretched and stored. The sliding parts 6 and sealing parts 7 in other connecting shells 4 are in a closed state under the pressure of the production fluid. That is, the sealing parts 71 in other positions are tightly fitted with the adjacent connecting shells 4. The following takes the sliding parts 6 and sealing parts 7 in the upper connecting shell 4 of the left first chamber 201 as an example: When the sliding member 6 and the sealing member 7 inside the connecting shell 4 begin to slide downwards, that is, when the hydraulic system 101 injects hydraulic oil into the left hydraulic chamber 205, the hydraulic system 101 simultaneously injects hydraulic oil into the hydraulic push rod 8, causing the telescopic end of the hydraulic push rod 8 to extend to the left. The telescopic end of the hydraulic push rod 8 drives the connecting rod 9 to move to the left, and the connecting rod 9 drives the sealing member 7 and the sealing part 71 to rotate clockwise (from a front-to-back perspective). The sealing part 71 rotates to the flow restriction member 74 on the right side of the sealing member 7, and the liquid guiding slope 72 rotates to the left side of the sealing member 7. Most of the mining fluid flows downwards from top to bottom inside the connecting shell 4, passing through the left side of the sealing member 7 and flowing downwards, thereby reducing the probability of the telescopic end of the hydraulic push rod 8 and the sealing part 71 being impacted by sand and gravel in the mining fluid.

[0027] After the sliding plug 3 moves to the far right of its stroke, the control terminal controls the hydraulic system 101 to inject hydraulic oil into the right hydraulic chamber 206, causing the sliding plug 3 to begin moving to the left. The hydraulic oil in the left hydraulic chamber 205 naturally flows back into the hydraulic system 101. At this time, the sliding parts 6 and 7 in the lower connecting shell 4 of the left chamber 201 and right chamber 203, and the sliding parts 6 and 7 in the upper connecting shell 4 of the left chamber 202 and right chamber 204, are opened downwards under the pressure of the mining fluid, according to the above working principle. Simultaneously, the control terminal controls the hydraulic system 101 to retract the upper connecting shell 4 of the left chamber 201 and right chamber 203. The hydraulic oil inside the hydraulic push rod 8 connects to the upper side of the left second chamber 202 and the right second chamber 204. This causes the telescopic end of the hydraulic push rod 8 to drive the adjacent connecting rod 9 and the sealing part 7 to reset, so that the sealing part 71 rotates back to the upper side of the sealing part 7. At the same time, the sealing part 7 and the sealing part 71 move upward and reset under the action of the reset tension spring 61 and the pressure of the production fluid. The sealing part 71 re-seals the adjacent connecting shell 4. The hydraulic system 101 injects hydraulic oil into the left hydraulic chamber 205 and the right hydraulic chamber 206 through reciprocating motion, so that the device continuously collects the production fluid in the well and transports the production fluid to the designated location through the fluid outlet pipe 103.

[0028] Example 2: Based on Example 1, this device also has the function of reducing the wear of the connecting shell 4 and the sealing position of the plugging part 71 on the gravel in the mining fluid.

[0029] Furthermore, referring to Figures 4-7A sliding ring 10 is slidably connected to the connecting shell 4 above the compression seal point of the sealing part 71. The maximum diameter of the sliding ring 10 is larger than the minimum diameter of the compression seal point between the connecting shell 4 and the sealing part 71. Therefore, the sliding ring 10 is limited by the connecting shell 4 and will not move to the lower side of the compression seal point between the connecting shell 4 and the sealing part 71. A guide filter 11 is fixedly connected to the lower side of the sliding ring 10. The cross-section of the guide filter 11 is circular, and its maximum diameter is smaller than the minimum diameter of the compression seal point between the connecting shell 4 and the sealing part 71. Therefore, the guide filter 11... 1 can extend into the joint between the connecting shell 4 and the sealing part 71. When the sealing part 71 and the connecting shell 4 are pressed and sealed, the guide filter 11 is pressed by the sealing part 71 and moves to the top of the joint between the connecting shell 4 and the sealing part 71. The center of the circle where the cross-section of the guide filter 11 is located gradually tilts from top to bottom away from the hydraulic push rod 8. The guide filter 11 actively guides the gravel in the mining fluid to the left side of the adjacent sealing part 7, further reducing the probability that the gravel will flow to the right side of the sealing part 7 with a small amount of mining fluid.

[0030] In the above scheme, refer to Figure 7 The height of the guide filter 11 in the vertical direction is not less than the height of the contact position between the connecting shell 4 and the sealing part 71 in the vertical direction. This allows the guide filter 11 to actively intercept and guide the sand and gravel in the mining fluid when the sealing part 7 moves downward to open, thereby reducing the possibility of wear from sand and gravel at the contact position between the connecting shell 4 and the sealing part 71.

[0031] The working principle of the above scheme is as follows: by Figure 7 Taking the connecting shell 4 and adjacent components as an example, when the sealing part 7 moves downward and opens under the pressure of the mining fluid, the mining fluid flows downward through the connecting shell 4. The sliding ring 10 and the guide filter 11 move downward under the action of the mining fluid. The guide filter 11 is inserted into the sealing part 71 of the connecting shell 4 and squeezed together. At this time, the downward flow of the mining fluid is less affected. The gravel mixed in the mining fluid flows downward directly through the sealing part 71 of the connecting shell 4 and squeezed together under the guidance of the guide filter 11. The gravel is guided by the guide filter 11 and gradually enters the liquid flow to the left side of the sealing part 7, thereby reducing the probability of the gravel entering the right side of the sealing part 7. When the sealing part 7 moves upward and resets under the pressure of the mining fluid, the sliding ring 10 and the guide filter 11 are squeezed upward and reset by the sealing part 71.

[0032] In Example 3, based on Example 2, this device also has the function of collecting clean mining fluid (i.e., mining fluid with low sand content and no obvious large sand particles), and using the clean mining fluid to backflush the connecting shell 4 and the sealing part 71 to squeeze the sealing joint, thereby reducing the probability of sand particles being trapped between the connecting shell 4 and the sealing part 71, and thus reducing the possibility that the sealing performance of the sealing joint between the connecting shell 4 and the sealing part 71 will decrease due to the trapping of sand particles.

[0033] Furthermore, referring to Figure 6 , Figure 8 and Figure 9 The fixed shell 5 and the sliding member 6 together form a cleaning cavity. A first filter screen 62 is fixedly connected to the lower side of the sliding member 6. The first filter screen 62 is used to prevent sand and gravel in the mining fluid inside the connecting shell 4 from entering the cleaning cavity. A one-way valve 63 is installed inside the fixed shell 5 on the sliding member 6. The cleaning cavity is connected to the connecting shell 4 through the first filter screen 62 and the one-way valve 63. The one-way valve 63 is used to draw the mining fluid from the connecting shell 4 from bottom to top through the first filter screen 62 when the volume of the cleaning cavity expands. When the volume of the cleaning cavity shrinks, the one-way valve 63 closes to prevent the mining fluid from flowing downward through the first filter screen 62. Symmetrically distributed fixed blocks 12 are fixedly connected to the sliding member 6. The fixed blocks 12 and the sliding member 6 are jointly provided with a drainage channel 601. The lower side of the drainage channel 601 is connected to the cleaning cavity. The upper side of the drainage channel 601 is connected to the inner side of the connecting shell 4. The outlet of the drainage channel 601 on the fixing block 12 is located on the upper side of the sealing member 7. The outlet of the drainage channel 601 on the fixing block 12 is slidably connected to the sealing block 13 for sealing itself, and an elastic element, which is a tension spring, is provided between the two. The contact position between the sealing block 13 and the adjacent drainage channel 601 is a frustum surface, which is used to diffuse the clean mining fluid discharged in the drainage channel 601 to the surrounding area, thereby increasing the impact range of the clean mining fluid. A second filter screen 14 is fixed at the largest diameter of the sealing block 13. The second filter screen 14 is located outside the drainage channel 601. The second filter screen 14 is used to prevent the sand and gravel in the surrounding mining fluid from flowing back into the drainage channel 601 when the sealing block 13 does not seal the adjacent drainage channel 601.

[0034] In the above scheme, the opening of the fixed shell 5 faces downward. Therefore, when the cleaning cavity is used to extract the mining fluid, the sand and gravel in the mining fluid are not easily attracted by the cleaning cavity due to their large inertia, which further reduces the difficulty of extracting clean mining fluid.

[0035] The working principle of the above scheme is as follows: by Figure 7Taking the connecting shell 4 and adjacent components as an example, when the sliding member 6 and the sealing member 7 move downwards and open under the pressure of the mining fluid, the sliding member 6 moves downwards relative to the fixed shell 5, the volume of the cleaning cavity increases, and the one-way valve 63 opens under the influence of negative pressure. The cleaning cavity draws the mining fluid from the connecting shell 4 from bottom to top through the first filter screen 62 and the one-way valve 63. The first filter screen 62 intercepts the sand and gravel in the mining fluid to make the solution in the cleaning cavity a clean mining fluid. When the sliding member 6 and the sealing member 7 move upwards and reset under the pressure of the mining fluid, the volume of the cleaning cavity decreases, and the one-way valve 63 closes under the influence of pressure. At this time, the clean mining fluid can only be discharged outwards through the drainage channel 601, and the sealing block 13 and the second filter screen 14 open under the impact of the clean mining fluid. The elastic element on the plugging block 13 stretches and stores force, and the cleaning fluid is guided by the plugging block 13 to spray out along a gradually expanding annular path towards the joint between the connecting shell 4 and the plugging part 71. While cleaning the joint between the connecting shell 4 and the plugging part 71, it reduces the possibility of sand-containing mining fluid in the connecting shell 4 flowing back upward under the action of liquid pressure during the period when the plugging part 71 is not fully reset. This reduces the probability of sand and gravel entering between the connecting shell 4 and the plugging part 71 and being trapped by the connecting shell 4 and the plugging part 71. When the sliding element 6 is fully reset and the cleaning fluid in the cleaning cavity no longer flows out, the plugging block 13 and the second filter screen 14 are reset under the elastic force of the elastic element on the plugging block 13. The second filter screen 14 prevents the surrounding sand-containing mining fluid from entering the drainage channel 601.

[0036] The above embodiments are provided for those skilled in the art to implement or use the present invention. Those skilled in the art can make various modifications or changes to the above embodiments without departing from the inventive concept of the present invention. Therefore, the protection scope of the present invention is not limited to the above embodiments, but should be the maximum scope that conforms to the innovative features mentioned in the present invention.

Claims

1. A hydraulic sand-containing oil-gas mixed transport and pressurization device, characterized in that, The system includes a mounting bracket (1), on which a hydraulic system (101), an inlet pipe (102), an outlet pipe (103), and a booster (2) are mounted. A sliding plug (3) is slidably connected inside the booster (2). The hydraulic system (101) is connected to the booster (2). The booster (2) is fixedly connected to and connected to multiple sets of spaced connecting shells (4). Each set of connecting shells (4) consists of two shells. The two connecting shells (4) in the same set are respectively connected to the inlet pipe (102) and the outlet pipe (103). A sliding plug (3) is fixedly connected inside the connecting shell (4). A fixed shell (5) is sealed and slidably connected to a sliding member (6), and a return spring (61) is installed between the two. The axis of the connecting shell (4) is vertical. A sealing member (7) is rotatably connected to the side of the sliding member (6) away from the fixed shell (5). The sealing member (7) has a spherical surface and a sealing part (71) is provided on the sealing member (7). The sealing part (71) is squeezed and sealed with the connecting shell (4). The connecting shell (4) is provided with a rotating mechanism for driving the sealing member (7) to rotate so that the sealing part (71) avoids the impact of gravel.

2. The hydraulic sand-containing oil-gas mixed transport and booster device according to claim 1, characterized in that, The rotating mechanism includes a hydraulic push rod (8), which is fixed to the connecting shell (4). The telescopic end of the hydraulic push rod (8) is hinged to a connecting rod (9), which is hinged to the sealing member (7). The connecting rod (9) is located on the side of the telescopic end of the hydraulic push rod (8) away from the fixed part of the hydraulic push rod (8).

3. A hydraulic sand-containing oil-gas mixed transport and pressurization device according to claim 2, characterized in that, The sealing component (7) is provided with a liquid guiding slope (72), which is located on the side of the sealing component (7) near the connecting rod (9).

4. A hydraulic sand-containing oil-gas mixed transport and booster device according to claim 3, characterized in that, A protective groove (73) is provided in the middle of the liquid guiding slope (72), and the hinge of the connecting rod (9) and the sealing member (7) is located in the protective groove (73).

5. A hydraulic sand-containing oil-gas mixed transport and booster device according to claim 2, characterized in that, A flow limiter (74) is fixed to the side of the connecting shell (4) near the hydraulic push rod (8), and the flow limiter (74) is located above the hydraulic push rod (8).

6. A hydraulic sand-containing oil-gas mixed transport and booster device according to claim 4, characterized in that, The side of the sealing part (71) away from the sealing member (7) is a spherical surface. The radius of the sphere on the sealing part (71) is greater than the radius of the sphere on the sealing member (7), and the two spherical surfaces are connected to each other.

7. A hydraulic sand-containing oil-gas mixed transport and booster device according to claim 6, characterized in that, The connecting shell (4) has a sliding ring (10) slidably connected above the joint between it and the sealing part (71). The maximum diameter of the sliding ring (10) is greater than the minimum diameter of the joint between the connecting shell (4) and the sealing part (71). A guide filter (11) is fixedly connected to the lower side of the sliding ring (10). The cross-section of the guide filter (11) is circular, and its maximum diameter is less than the minimum diameter of the joint between the connecting shell (4) and the sealing part (71). When the sealing part (71) and the connecting shell (4) are in a joint seal, the guide filter (11) contacts the sealing part (71).

8. A hydraulic sand-containing oil-gas mixed transport and booster device according to claim 7, characterized in that, The center of the circle containing the cross-section of the guide filter (11) gradually tilts from top to bottom away from the hydraulic push rod (8).

9. A hydraulic sand-containing oil-gas mixed transport and booster device according to claim 8, characterized in that, The fixed shell (5) and the sliding member (6) together form a cleaning cavity. A first filter screen (62) is fixedly connected to the lower side of the sliding member (6). A one-way valve (63) is installed inside the fixed shell (5) on the sliding member (6). The cleaning cavity is connected to the connecting shell (4) through the first filter screen (62) and the one-way valve (63). A symmetrically distributed fixed block (12) is fixedly connected to the sliding member (6). The fixed block (12) and the sliding member (6) are provided with a drain channel (601). The drain channel (601) is connected to both the cleaning cavity and the connecting shell (4). The outlet of the drain channel (601) on the fixed block (12) is located above the sealing member (7). A sealing block (13) for sealing itself is slidably connected to the outlet position of the drain channel (601) on the fixed block (12), and an elastic member is provided between the two.

10. A hydraulic sand-containing oil-gas mixed transport and booster device according to claim 9, characterized in that, The contact position between the sealing block (13) and the adjacent drainage channel (601) is a frustum surface. The sealing block (13) is fixedly connected to a second filter screen (14), which is located outside the drainage channel (601).

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