Buffer device for sand-containing medium
By designing a buffer device for sand -containing medium, the fluid entrance and fluid export of the dislocation settings are used to solve the problem of antihypertensive elbow leakage caused by the sand outlets caused by the sand out of the air well, and the sand body is effectively reduced. The effect of erosion and spinning frequency.
Patent Information
- Application Number
- CN202421378970.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-17
- Publication Date
- 2025-01-24
- Estimated Expiration
- 2034-06-17
AI Technical Summary
The current pressure-down elbows are prone to pricking and leakage when a large amount of sand is released from the gas well, resulting in a sharp increase in the risk of pricking and leakage in the ground pipeline.
Design a buffer device for sand -containing medium, including cavity structure, buffer cavity, fluid inlet, and fluid exit, fluid inlet and fluid export dislocation setting, and set the buffer core in the buffer cavity to slow down the sand content medium The speed of the inside.
By slowing down the flow speed of the sand body, the erosion force of the sand-containing medium is effectively reduced, thereby preventing the sand body from piercing the pipeline and reducing the frequency of leakage in the buffer device and downstream pipelines.
Smart Images
Figure CN222392304U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of gas production technology in oil and gas fields, in particular to a buffer device for sand-containing media. Background Art
[0002] With the continuous breakthroughs in natural gas exploration and development technology, large-volume sand-added fracturing technology is increasingly being used in the transformation of ultra-deep and high-pressure gas reservoirs. However, after the gas wells using large-volume sand-added fracturing technology are put into production, the fracturing wells generally produce a large amount of sand due to the influence of the self-generated sand after the formation is damaged by fracturing, the supporting sand added by the fracturing process itself, and the degree of fracture closure. The sand production in the gas wells immediately leads to a sharp increase in the risk of puncture leakage in the ground pipeline, especially at the pressure drop elbow. Due to the surge in the flow rate of the sand-containing medium in the pipeline after the pressure drop, the erosion force of the medium surges.
[0003] At present, there are mainly two types of pressure drop elbows, most of which are seamless steel pipe right-angle elbows. Since there are no special anti-puncture measures at the front impact point of the right-angle elbow, puncture leakage incidents occur frequently; the other part is conventional anti-puncture leakage three-way elbows. One end of the three-way elbow is an ordinary blind plate, which has a certain anti-puncture leakage buffering capacity. However, with the in-depth application of volume fracturing technology, more and more high-pressure and high-yield gas wells with sand production have been developed, and the erosion force of sand-containing media has increased exponentially. Conventional three-way elbow blind plate puncture leakage incidents also occur frequently.
[0004] Therefore, there is an urgent need for a technical solution to solve the technical problem that the currently used pressure-reducing elbow is prone to puncture and leak when a large amount of sand is produced in a gas well. Utility Model Content
[0005] The utility model aims to provide a buffer device for sand-containing media in view of the technical problem that the currently used pressure-reducing elbow is prone to leakage when a large amount of sand is produced in a gas well.
[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0007] A buffer device for sand-containing media, comprising a cavity structure, wherein the cavity structure is provided with a buffer cavity, a fluid inlet and a fluid outlet, wherein the fluid inlet and the fluid outlet are both communicated with the buffer cavity, and the fluid inlet and the fluid outlet are staggered;
[0008] The buffer cavity is provided with a buffer core, and the buffer core is nested in the buffer cavity. The buffer core is used to reduce the velocity of the sand body in the sand-containing medium.
[0009] The utility model discloses a buffer device for sand-containing medium. The sand-containing medium enters the buffer cavity from the fluid inlet and then is discharged from the buffer cavity through the fluid outlet. The fluid inlet and the fluid outlet are staggered so that the flow trajectory of the sand-containing medium after entering the buffer cavity is changed. The reverse force of the sand-containing medium impacting the wall of the buffer cavity will decelerate the sand-containing medium entering the buffer cavity, so that the buffer cavity plays a role in buffering the speed of the sand body in the sand-containing medium. A buffer core is arranged in the buffer cavity. The sand-containing medium can pass through the buffer core when flowing in the buffer cavity. The sand body in the sand-containing medium impacts the buffer core, so that the buffer core slows down the flow speed of the sand body. The utility model discloses a buffer device for sand-containing medium. By staggering the fluid inlet and the fluid outlet and arranging the buffer core in the buffer space, the sand body in the sand-containing medium can reduce the speed after passing through the cavity structure, thereby preventing the sand body from leaking through the pipeline.
[0010] As a preferred embodiment of the utility model, the buffer core includes a frame structure, the frame structure is provided with a through buffer channel, the fluid inlet and the fluid outlet are both connected to the buffer channel, a plurality of buffers are provided in the buffer channel, and the buffers are welded or detachably connected to the frame structure. The buffer core is provided with a through channel as a buffer channel, a plurality of buffers are provided in the buffer channel, and the sand-containing medium flows along the axial direction of the buffer channel after entering the buffer channel, and the sand body in the sand-containing medium hits the buffer, so that the speed of the sand body is slowed down, and the frame structure supports the buffer core; the welding connection has better structural strength; the detachable connection method can replace buffers with different blocking capabilities according to the sand content of the sand-containing medium, so that the buffer device for the sand-containing medium can adapt to different use environments.
[0011] As a preferred solution of the utility model, the buffer comprises a plurality of first blocking bars, one end of which converges and is connected, and the other end is respectively connected to the frame structure. The plurality of first blocking bars are arranged in a divergent shape with the end as the center, so that the sand-containing medium can flow through the gap between adjacent first blocking bars, and the sand body in the sand-containing medium can be decelerated when it hits the first blocking bar; the adjacent buffers are arranged in a staggered manner, so that the sand body can continuously hit the first blocking bars of different buffers when flowing in the buffer channel, thereby improving the buffering effect of the buffer core on the sand body.
[0012] As a preferred solution of the utility model, a plurality of buffers are arranged at intervals along the flow direction of the sand-containing medium, and the first blocking bars of adjacent buffers are arranged in a staggered manner. By staggering the first blocking bars of the buffers, the sand body can continuously collide with the first blocking bars to decelerate.
[0013] As a preferred solution of the utility model, the buffer member includes a plurality of second blocking bars, which are staggered to form a mesh structure, and the second blocking bars are connected to the frame structure. The mesh structure can also have a good deceleration effect on the sand body.
[0014] As a preferred embodiment of the utility model, the buffer cavity includes a cylindrical space, and the buffer core includes a plurality of strip structures and a plurality of annular structures, and the strip structures are connected to the annular structures; along the circumference of the buffer core, the plurality of strip structures are arranged at intervals; along the axial direction of the buffer core, the plurality of annular structures are arranged at intervals, and the buffer is connected to the annular structures. The cylindrical space has a smooth cavity wall, which can reduce the damage to the cavity wall caused by the flow of sand-containing media and improve the service life of the cavity structure. The shape of the buffer core is adapted to the shape of the cylindrical space, so that the sand-containing media flowing into the cylindrical space are discharged after being buffered by the buffer core; the annular structure connects the strip structures to ensure the structural stability of the buffer core.
[0015] As a preferred solution of the utility model, the fluid inlet and the fluid outlet are arranged at 90 degrees, and the fluid inlet is parallel to the axial direction of the buffer chamber; the cross-sectional area of the fluid inlet and the cross-sectional area of the fluid outlet are both smaller than the cross-sectional area of the buffer chamber. The cylindrical space has a large volume, and after the sand-containing medium enters the cylindrical space, the cylindrical space can reduce the flow rate of the sand-containing medium, thereby reducing the erosion force of the sand body in the sand-containing medium; the fluid inlet and the fluid outlet are arranged at 90 degrees, so that the sand body can be fully decelerated in the buffer chamber.
[0016] As a preferred solution of the utility model, the cavity structure is provided with an inlet pipe and an outlet pipe, the inlet pipe is adapted to communicate with the fluid inlet, the outlet pipe is adapted to communicate with the fluid outlet, and the inlet pipe is flange-connected to a stop valve. By providing the inlet pipe and the outlet pipe, flanges are provided on the inlet pipe and the outlet pipe, and the cavity structure is more easily installed in the pipeline through the flange, which is convenient for the maintenance and use of the cavity structure; the stop valve can adjust the flow rate and flow of the sand-containing medium entering the cavity structure, so that the high-pressure and low-flow-rate sand-containing medium at the front end of the stop valve changes into a low-pressure and high-flow-rate fluid when entering the buffer cavity.
[0017] As a preferred solution of the utility model, a through hole is provided on the cavity structure member opposite to the fluid inlet, and the through hole is covered with an alloy blind plate, and the alloy blind plate is detachably connected to the cavity structure member. The through hole is arranged opposite to the fluid inlet, and the through hole is covered with an alloy blind plate. After the sand body in the sand-containing medium enters the buffer cavity, it will hit the alloy blind plate under the action of inertia, so that the alloy blind plate slows down the sand body; the alloy blind plate has better structural strength and stronger impact resistance, and can prevent the sand-containing medium from puncturing the cavity structure member; the operator can maintain the buffer core and the buffer cavity by opening the alloy blind plate; the alloy blind plate can be replaced periodically to prevent the alloy blind plate from puncturing.
[0018] As a preferred solution of the utility model, the cavity structure is provided with a connecting portion, the alloy blind plate is provided with a connecting hole, and the connecting portion is bolted to the connecting hole. The bolt connection makes the alloy blind plate easy to install and disassemble.
[0019] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:
[0020] 1. The utility model is a buffer device for sand-containing media. The sand-containing media enters the buffer cavity from the fluid inlet and then exits the buffer cavity through the fluid outlet. The fluid inlet and the fluid outlet are staggered so that the flow trajectory of the sand-containing media after entering the buffer cavity is changed. The reverse force of the sand-containing media impacting the wall of the buffer cavity will decelerate the sand-containing media entering the buffer cavity, so that the buffer cavity plays a role in buffering the sand body speed in the sand-containing media.
[0021] 2. The utility model is a buffer device for sand-containing media, in which a buffer core is arranged in a buffer cavity. When the sand-containing media flows in the buffer cavity, the sand body in the sand-containing media can pass through the buffer core, and the buffer core slows down the flow speed of the sand body by impacting the buffer core;
[0022] 3. The utility model is a buffer device for sand-containing media. By staggering the fluid inlet and the fluid outlet and arranging a buffer core in the buffer space, the sand body in the sand-containing medium can reduce its speed after passing through the cavity structure, thereby preventing the sand body from piercing the pipeline.
[0023] 4. The utility model is a buffer device for sand-containing media, which has a simple structure, is easy to manufacture and convenient to use. By staggering the fluid inlet and the fluid outlet, the reverse force of the sand-containing medium impacting the wall of the buffer chamber will decelerate the sand-containing medium entering the buffer chamber, and the sand body in the sand-containing medium will be decelerated by the buffer core, thereby reducing the speed of the sand body flowing out of the fluid outlet, which can effectively reduce the erosion force of the sand body in the sand-containing medium, and then effectively reduce the frequency of punctures in the buffer device and downstream pipelines, and has good economic value and practical value. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 is a schematic structural diagram of a buffer device for sand-containing media in Example 1;
[0025] Figure 2 is a schematic structural diagram of the buffer core of Example 1;
[0026] Figure 3 is a schematic structural diagram of the buffer core of Example 1;
[0027] Figure 4 is a schematic structural diagram of a buffer device for sand-containing media according to Example 4;
[0028] Figure 5 It is a schematic diagram of the structure of the buffer component of Example 6.
[0029] icon:
[0030] 1- cavity structure, 2- fluid inlet, 3- fluid outlet, 4- buffer core, 5- inlet pipe, 6- outlet pipe, 7- stop valve, 8- through hole, 9- alloy blind plate, 10- connecting part, 41- strip structure, 42- ring structure, 43- buffer channel, 44- first blocking bar, 45- second blocking bar. DETAILED DESCRIPTION
[0031] The utility model is described in detail below in conjunction with the accompanying drawings.
[0032] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.
[0033] Example 1
[0034] like Figure 1-Figure 3 A buffer device for sand-containing media shown in the figure comprises a cavity structure 1, wherein the cavity structure 1 is provided with a buffer cavity, a fluid inlet 2 and a fluid outlet 3, wherein the fluid inlet 2 and the fluid outlet 3 are both communicated with the buffer cavity, and the fluid inlet 2 and the fluid outlet 3 are staggered;
[0035] The buffer cavity is provided with a buffer core 4, and the buffer core 4 is nested in the buffer cavity. The buffer core 4 is used to reduce the velocity of the sand body in the sand-containing medium.
[0036] The sand-containing medium enters the buffer cavity from the fluid inlet 2 and then is discharged from the buffer cavity through the fluid outlet 3. The fluid inlet 2 and the fluid outlet 3 are staggered to change the flow trajectory of the sand-containing medium after entering the buffer cavity. The reverse force of the sand-containing medium impacting the wall of the buffer cavity will decelerate the sand-containing medium entering the buffer cavity, so that the buffer cavity plays a role in buffering the sand body speed in the sand-containing medium. A buffer core 4 is arranged in the buffer cavity. When the sand-containing medium flows in the buffer cavity, it can pass through the buffer core 4. The sand body in the sand-containing medium hits the buffer core 4, so that the buffer core 4 slows down the flow speed of the sand body. By staggering the fluid inlet 2 and the fluid outlet 3 and arranging the buffer core 4 in the buffer space, the sand body in the sand-containing medium can reduce its speed after passing through the cavity structure 1, thereby preventing the sand body from leaking through the pipeline.
[0037] Specifically, the buffer cavity is a cylindrical space, the fluid inlet 2 is connected to the end of the cylindrical space, the fluid outlet 3 is connected to the side of the cylindrical space, and the fluid inlet 2 and the fluid outlet 3 are arranged at 90 degrees; a through hole 8 is arranged in the cavity structure 1, so that the through hole 8 penetrates the cavity structure 1 and is connected to the cylindrical space, the through hole 8 is arranged opposite to the fluid inlet 2, and the diameter of the through hole 8 is equal to the diameter of the cylindrical space; an alloy blind plate 9 is covered on the through hole 8, and the cross-sectional area of the fluid inlet 2 and the cross-sectional area of the fluid outlet 3 are both smaller than the cross-sectional area of the buffer cavity; when the sand-containing medium enters the cylindrical space from the fluid inlet 2 Due to the large volume of the cylindrical space, the speed of the sand-containing medium is reduced. When the sand-containing medium hits the alloy blind plate 9 under the action of inertia, the sand-containing medium will flow in the opposite direction due to the blocking effect of the alloy blind plate 9, so that the sand-containing medium flowing in the opposite direction reduces the flow rate of the sand-containing medium entering from the fluid inlet 2; the alloy blind plate 9 is the main impact position of the sand-containing medium, and the strong anti-erosion ability of the alloy blind plate 9 itself can prevent the buffer device from leaking; the buffer core 4 is cylindrical, and the buffer core 4 is adapted to be connected with the cylindrical space; the through hole 8 allows the operator to maintain the buffer core 4 and the cylindrical space.
[0038] Specifically, the buffer core 4 is a cylindrical frame structure, and the buffer core 4 is composed of a plurality of strip structures 41 and a plurality of annular structures 42. Along the circumference of the buffer core 4, the plurality of strip structures 41 are arranged on the annular structure 42 in an annular manner; along the axial direction of the columnar structure, a plurality of annular structures are arranged at intervals, and the centers of all the annular structures are located on the axis of the buffer core 4; the buffer core 4 is provided with a through buffer channel 43, the fluid inlet 2 and the fluid outlet 3 are both connected to the buffer channel 43, the end of the buffer channel 43 is connected to the fluid inlet 2, a plurality of buffers are arranged in the buffer channel 43, and the buffers are welded to the annular structure.
[0039] Specifically, the buffer is composed of eight first blocking bars 44 forming a "M"-shaped structure, one end of the eight first blocking bars 44 are converged and connected, and the other end is respectively connected to the annular structure, and along the axial direction of the columnar structure, adjacent "M"-shaped structures are spaced apart, and adjacent "M"-shaped structures are staggered; by adjusting the setting angle of the "M"-shaped structure, the gaps between adjacent "M"-shaped structures along the axial direction of the columnar structure are staggered, so that the sand body in the fluid medium can continuously collide with the first blocking bars 44 of different "M"-shaped structures, so that the sand body is continuously decelerated.
[0040] Specifically, the cavity structure 1 is provided with an inlet pipe 5 and an outlet pipe 6, the inlet pipe 5 is adapted to be connected with the fluid inlet 2, and the outlet pipe 6 is adapted to be connected with the fluid outlet 3; the arrangement of the inlet pipe 5 and the outlet pipe 6 makes it easier to connect the cavity structure 1 in the pipeline; the inlet pipe 5 is flange-connected to the stop valve 7; the stop valve 7 can control the flow velocity and flow rate of the sand-containing medium entering the cylindrical space, so that the sand discharged from the fluid outlet 3 can be decelerated.
[0041] Specifically, a connecting portion 10 is provided on the cavity structure 1, and the alloy blind plate 9 is in the shape of a circular plate. A plurality of connecting holes are opened on the alloy, and the connecting holes and the connecting portion 10 are detachably connected by bolt connection.
[0042] In some embodiments, the buffer is composed of more than eight first barrier ribs 44 or less than eight first barrier ribs 44 .
[0043] The utility model discloses a buffer device for sand-containing medium. When the high-pressure and low-flow-rate sand-containing medium passes through the stop valve 7, it becomes a low-pressure and high-flow-rate sand-containing medium. The low-pressure and high-flow-rate sand-containing medium enters the lower end pipeline from the fluid outlet 3 after four-stage buffering. The first-stage buffer is a cylindrical space. Due to the large volume of the cylindrical space, the sand-containing medium enters the cylindrical space from the small diameter of the fluid inlet 2. The flow rate of the sand-containing medium can be effectively reduced by changing the diameter, thereby reducing the erosion force of the sand body in the sand-containing medium. The second-stage buffer is a buffer core 4. The sand-containing medium passes through the buffer core 4. By impacting the "M"-shaped structural parts, the erosion force of the sand body is reduced; the third-level buffer is the alloy blind plate 9 buffer, and the medium reduces the erosion force by impacting the alloy blind plate 9, thereby reducing the erosion effect on the downstream pipeline; the fourth-level buffer is a compression buffer. In the cylindrical space, after the sand-containing medium hits the alloy blind plate 9, it will apply a reverse force to the sand-containing medium entering the cylindrical space from the fluid inlet 2, which can effectively reduce the erosion force of the sand body in the medium, and effectively reduce the erosion effect of the sand body on the alloy blind plate 9, thereby effectively reducing the frequency of punctures in the buffer device and the downstream pipeline.
[0044] Example 2
[0045] The buffer device for sand-containing media in this embodiment has a structure substantially the same as that of Embodiment 1. The difference from Embodiment 1 is that the “M”-shaped structural member is welded to the strip-shaped structural member 41 .
[0046] Specifically, adjacent "M"-shaped structural members are arranged at intervals.
[0047] Example 3
[0048] The buffer device for sand-containing media of this embodiment has a structure substantially the same as that of Embodiment 1. The difference from Embodiment 1 is that the “M”-shaped structural member is detachably connected to the annular structural member.
[0049] By replacing different "M"-shaped structural members, the buffering capacity of the buffer core 4 to the sand-containing medium can be changed.
[0050] Example 4
[0051] like Figure 4 The structure of the buffer device for sand-containing media shown is substantially the same as that of Embodiment 1. The difference from Embodiment 1 is that the inlet pipe 5 is not connected to the stop valve 7.
[0052] Example 5
[0053] The buffer device for sand-containing media of this embodiment has a structure substantially the same as that of Embodiment 1. The difference from Embodiment 1 is that the buffer cavity is a rectangular block space, and the frame structure is a rectangular structure adapted to the shape of the rectangular block space.
[0054] Example 6
[0055] like Figure 5 A buffer device for sand-containing media is shown, and its structure is substantially the same as that of Example 1. The difference from Example 1 is that the buffer comprises a plurality of second blocking bars 45, and the plurality of second blocking bars 45 are staggered to form a mesh structure, and the second blocking bars 45 are connected to the frame structure.
[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A buffer device for sand-containing media, characterized in that: The invention comprises a cavity structure (1), wherein the cavity structure (1) is provided with a buffer cavity, a fluid inlet (2) and a fluid outlet (3), wherein the fluid inlet (2) and the fluid outlet (3) are both connected to the buffer cavity, and the fluid inlet (2) and the fluid outlet (3) are arranged in a staggered manner; The buffer cavity is provided with a buffer core (4), the buffer core (4) being nested and arranged in the buffer cavity, and the buffer core (4) being used to reduce the velocity of the sand body in the sand-containing medium.
2. A buffer device for sand-containing media according to claim 1, characterized in that: The buffer core (4) comprises a frame structure, the frame structure is provided with a through buffer channel (43), the fluid inlet (2) and the fluid outlet (3) are both in communication with the buffer channel (43), a plurality of buffer components are provided in the buffer channel (43), and the buffer components are connected to the frame structure by welding or in a detachable manner.
3. A buffer device for sand-containing media according to claim 2, characterized in that: The buffer component comprises a plurality of first blocking bars (44), one ends of the plurality of first blocking bars (44) being converged and connected, and the other ends thereof being respectively connected to the frame structure component.
4. A buffer device for sand-containing media according to claim 3, characterized in that: A plurality of the buffer members are arranged at intervals along the flow direction of the sand-containing medium, and the first blocking bars (44) of adjacent buffer members are arranged in a staggered manner.
5. A buffer device for sand-containing media according to claim 2, characterized in that: The buffer component comprises a plurality of second blocking bars (45), wherein the plurality of second blocking bars (45) are arranged in a staggered manner to form a mesh structure component, and the second blocking bars (45) are connected to the frame structure component.
6. A buffer device for sand-containing media according to claim 2, characterized in that: The buffer cavity comprises a cylindrical space, and the buffer core (4) comprises a plurality of strip-shaped structural members (41) and a plurality of annular structural members (42), wherein the strip-shaped structural members (41) are connected to the annular structural members (42); along the circumference of the buffer core (4), the plurality of strip-shaped structural members (41) are arranged at intervals; along the axial direction of the buffer core (4), the plurality of annular structural members (42) are arranged at intervals, and the buffer members are connected to the annular structural members (42).
7. A buffer device for sand-containing media according to claim 1, characterized in that: The fluid inlet (2) and the fluid outlet (3) are arranged at 90 degrees, and the fluid inlet (2) is parallel to the axial direction of the buffer cavity; the cross-sectional area of the fluid inlet (2) and the cross-sectional area of the fluid outlet (3) are both smaller than the cross-sectional area of the buffer cavity.
8. A buffer device for sand-containing media according to claim 1, characterized in that: The cavity structure (1) is provided with an inlet pipe (5) and an outlet pipe (6); the inlet pipe (5) is adapted to be in communication with the fluid inlet (2); the outlet pipe (6) is adapted to be in communication with the fluid outlet (3); and the inlet pipe (5) is flange-connected to a stop valve (7).
9. A buffer device for sand-containing media according to any one of claims 1 to 8, characterized in that: A through hole (8) is provided on the cavity structure component (1) opposite to the fluid inlet (2), and the through hole (8) is covered with an alloy blind plate (9), and the alloy blind plate (9) is detachably connected to the cavity structure component (1).
10. A buffer device for sand-containing media according to claim 9, characterized in that: The cavity structure (1) is provided with a connecting portion (10), the alloy blind plate (9) is provided with a connecting hole, and the connecting portion (10) is bolt-connected to the connecting hole.