Sand flushing and discharging pipeline

Abstract

The utility model discloses a sand flushing and discharging pipeline, and particularly relates to the technical field of sand flushing and discharging pipes, the sand flushing and discharging pipeline comprises an inner main pipe, a double-end sand suction port, a front vortex nozzle and a rear vortex nozzle, the double-end sand suction port is arranged at one end of a sand suction pipe far away from the inner main pipe, and an external auxiliary pipe is arranged below a connecting main pipe; the front vortex nozzles are installed at the ends, away from the sand suction pipe, of the two connecting supporting rods correspondingly, and the rear vortex nozzles are installed at the ends, away from the sand suction pipe, of the two connecting supporting rods correspondingly. Solid particles in fluid are separated through the front vortex nozzle and the rear vortex nozzle by means of centrifugal force, airflow is generated in water near an inlet of the sand suction pipe to drive water flow containing silt to form high-speed rotating vortex in a cavity of the separator, and under the action of the centrifugal force, the silt particles are thrown to the outer wall of the vortex cavity, so that the silt particles are separated. And the sand suction pipe moves downwards along the outer wall, enters the sand suction pipe through the underflow pipe and is discharged, so that faults caused by mechanical wear are reduced, and the equipment does not need to be frequently inspected, replaced and maintained.

Description

Technical Field

[0001] This utility model relates to the field of flushing and sand discharge pipe technology, and more specifically, to a flushing and sand discharge pipeline. Background Technology

[0002] In oil and gas field surface engineering, the produced fluid from oil wells is mostly a mixture of oil, gas, water, and sand. As this mixture migrates through formation pores and the wellbore, it inevitably carries solid impurities such as mud and sand. A horizontal three-phase separator is an indispensable device for separating oil, gas, and water. Further separation of sand from the mixture creates a four-phase separator for oil, gas, water, and sand.

[0003] A search revealed that patent publication number CN211935721U discloses a sand-removing device for an oil-gas-water-sand four-phase separator. The device includes a separator cylinder with several connecting pipes connected along its length at the bottom. An upper pipe is connected to the top of each connecting pipe, and several sand-suction upper pipes are vertically connected to the upper pipes along their length. Several sand-suction pipes are connected to the bottom of each sand-suction upper pipe, and a rotating frame is connected to the lower end of each sand-suction pipe. An impeller shaft is rotatably connected to the rotating frame, and an impeller is connected to the lower end of the impeller shaft. The lower end of each connecting pipe extends out of the separator cylinder and is connected to a lower pipe, which is connected to a valve. This device not only enables sand removal without shutting down the four-phase separator but also allows sand removal even when the separator is stopped, virtually eliminating sand removal dead zones, resulting in excellent sand removal efficiency. However, the inventors discovered the following problems with the existing technology during the development of this utility model:

[0004] Existing sand flushing devices, although the brushes connected to the bottom of the impeller can help clean mud and sand, the impeller is constantly being flushed by mud, sand and water during operation. When separating mud and sand that is difficult to clean, the brushes connected to the bottom will also rub against the bottom of the separator cylinder. After long-term use, the impeller and brushes will wear down, which will easily lead to failure. This will require regular inspection and replacement, increasing maintenance costs and workload.

[0005] Therefore, a flushing and sand-draining pipeline is proposed to address the above problems. Summary of the Invention

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a flushing and sand discharge pipeline to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a sand flushing pipeline, comprising an inner main pipe, a double-headed sand suction port, a front vortex nozzle, and a rear vortex nozzle. Sand suction pipes are provided on both sides of the inner main pipe, and several sets of sand suction pipes are provided. The double-headed sand suction port is installed at the end of the sand suction pipe furthest from the inner main pipe. A connecting main pipe is provided at the bottom of the inner main pipe, and three sets of connecting main pipes are provided. An external auxiliary pipe is provided below the connecting main pipe, and an outlet is provided at the front end of the external auxiliary pipe. A first electric valve is installed in the inner cavity of the differential pressure pipe. A backflow flushing pipe is provided at the rear end of the external auxiliary pipe, and a second electric valve is installed in the body of the backflow flushing pipe. An outlet electric valve is installed in the inner cavity of the outlet, and a differential pressure pipe is provided on the left side of the outlet.

[0008] Two sets of sand suction pipes have connecting support rods welded to their outer sides at both ends. An airflow pipe is installed at the upper end of the inner main pipe. The front vortex nozzles are respectively installed at the ends of the two sets of connecting support rods away from the sand suction pipes. The rear vortex nozzles are respectively installed at the ends of the two sets of connecting support rods away from the sand suction pipes. Both ends of the airflow pipe are equipped with tee pipes. An air delivery pipe is set at the center of one side of the airflow pipe. An air pump is set on the right side of the air delivery pipe.

[0009] Preferably, the two sets of front vortex nozzles are tilted 45° to the left and the two sets of rear vortex nozzles are tilted 45° to the right.

[0010] Preferably, the two ends of the two sets of three-way pipes away from the airflow pipe are respectively connected to the two sets of front vortex nozzles and the two sets of rear vortex nozzles.

[0011] Preferably, the end of the air supply pipe away from the airflow pipe is connected to the output end of the air pump, and the inner main pipe and the outer auxiliary pipe are arranged vertically parallel to each other.

[0012] Preferably, the two ends of the three sets of connecting main pipes are respectively connected to the inner main pipe and the outer auxiliary pipe, and the three sets of connecting main pipes are arranged in an equidistant manner.

[0013] Preferably, the inner cavities at both ends of the dual-headed sand suction port are interconnected, and several groups of sand suction pipes are distributed and arranged at equal intervals.

[0014] The technical effects and advantages of this utility model are as follows:

[0015] 1. Compared with existing technologies, this flushing and sand discharge pipeline uses centrifugal force to separate solid particles in the fluid through front and rear vortex nozzles. Near the sand suction pipe inlet, airflow is generated in the water, which drives the water containing silt to form a high-speed rotating vortex in the separator chamber. Under the action of centrifugal force, the silt particles are thrown towards the outer wall of the vortex chamber and move downward along the outer wall. They are then discharged through the underflow pipe into the sand suction pipe, thereby reducing failures caused by mechanical wear and eliminating the need for frequent equipment inspection, replacement and maintenance. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the three-dimensional cross-sectional structure of the airflow tube of this utility model.

[0018] Figure 3 This utility model Figure 1 A magnified schematic diagram of the structure at point A in the diagram.

[0019] Figure 4 This is a schematic diagram of the three-dimensional cross-sectional structure of the sand suction pipe of this utility model.

[0020] The attached diagram is labeled as follows: 1. Inner main pipe; 2. Sand suction pipe; 3. Double-ended sand suction port; 4. Connecting main pipe; 5. External auxiliary pipe; 6. Water outlet; 7. Differential pressure pipe; 8. First electric valve; 9. Water outlet electric valve; 10. Connecting support rod; 11. Airflow pipe; 12. Front vortex nozzle; 13. Rear vortex nozzle; 14. T-connector; 15. Air supply pipe; 16. Air pump; 17. Backflow flushing pipe; 18. Second electric valve. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0022] As attached Figures 1 to 4The sand flushing pipeline shown includes an inner main pipe 1, a double-headed sand suction port 3, a front vortex nozzle 12 and a rear vortex nozzle 13. Sand suction pipes 2 are provided on both sides of the inner main pipe 1, and several sets of sand suction pipes 2 are provided. The double-headed sand suction port 3 is installed at the end of the sand suction pipe 2 away from the inner main pipe 1. A connecting main pipe 4 is provided at the bottom of the inner main pipe 1, and three sets of connecting main pipes 4 are provided. An external auxiliary pipe 5 is provided below the connecting main pipe 4. A water outlet 6 is provided at the front end of the external auxiliary pipe 5. A first electric valve 8 is installed in the inner cavity of the differential pressure pipe 7. A backflow flushing pipe 17 is provided at the rear end of the external auxiliary pipe 5. A second electric valve 18 is installed in the pipe body of the backflow flushing pipe 17. A water outlet electric valve 9 is installed in the inner cavity of the water outlet 6. A differential pressure pipe 7 is provided on the left side of the water outlet 6.

[0023] Both ends of the two sets of sand suction pipes 2 are welded with connecting support rods 10. The upper end of the inner main pipe 1 is equipped with an airflow pipe 11. The front vortex nozzles 12 are respectively installed at the ends of the two sets of connecting support rods 10 away from the sand suction pipes 2. The rear vortex nozzles 13 are respectively installed at the ends of the two sets of connecting support rods 10 away from the sand suction pipes 2. Both ends of the airflow pipe 11 are equipped with tee pipes 14. An air delivery pipe 15 is set at the center of one side of the airflow pipe 11. An air pump 16 is set on the right side of the air delivery pipe 15.

[0024] The main internal pipe 1 serves as the primary transmission channel for sediment and water flow. It concentrates and transports the sand-laden water flow sucked in by the sand suction pipe 2 to subsequent treatment stages, ensuring the smooth operation of the sand discharge process. Several sets of sand suction pipes 2 on both sides of the main internal pipe 1 increase the coverage area for sand suction, allowing the flushing and sand discharge pipeline to absorb sediment over a larger area, thus improving sand discharge efficiency. The inner cavities at both ends of the double-headed sand suction port 3 are interconnected, enabling simultaneous suction of sediment from two directions, further improving the efficiency and range of sand suction and ensuring effective collection of sediment under different water flow and sediment conditions. The connecting main pipe 4 connects the main internal pipe 1 and the external auxiliary pipe 5, realizing fluid transmission between the two. This allows the sand-laden water flow to flow smoothly from the main internal pipe 1 to the external auxiliary pipe 5, completing the transition stage in the sand discharge process. The external auxiliary pipe 5 plays a role in diversion and discharge, guiding the sand-laden water flow from the main internal pipe 1 to the outlet 6 for discharge or backflow flushing operations as needed, increasing the flexibility and versatility of the flushing and sand discharge pipeline.

[0025] Outlet 6 serves as the final sand discharge outlet of the sand flushing pipeline. Outlet 6 discharges the treated sand-containing water from the system, effectively removing silt. The first electric valve 8 and the outlet electric valve 9 precisely control the water flow rate between outlet 6 and differential pressure pipe 7 according to actual needs. Differential pressure pipe 7 forms a pressure difference with the separator cavity through the opening and closing of the first electric valve 8, thereby drawing out the sand flow inside the separator. In different working scenarios, the valve opening can be adjusted according to the silt content and water flow conditions to achieve the best sand discharge effect. The backflow flushing pipe 17 of the second electric valve 18 provides a backflow flushing function for the sand flushing pipeline. When silt blockage occurs in the pipeline or maintenance is required, the valve of outlet 6 is closed, the second electric valve 18 is opened, and the water flows in reverse through the backflow flushing pipe 17 to flush the pipeline and enter the separator for sand flushing.

[0026] The connecting support rod 10 is welded to the outer sides of both ends of the sand suction pipe 2, providing a stable support structure for the front vortex nozzle 12 and the rear vortex nozzle 13. This ensures that the nozzles maintain a fixed position and angle during operation, guaranteeing the formation and effectiveness of the vortex. The air supply pipe 15 and the airflow pipe 11 serve as transmission channels for the airflow output from the air pump 16, delivering high-pressure airflow to the front vortex nozzle 12 and the rear vortex nozzle 13, providing a power source for the nozzles to generate vortices. The three-way pipes 14 installed at both ends of the airflow pipe 11 can evenly distribute the airflow. Each nozzle receives sufficient airflow to form a stable and efficient vortex in the water. The front vortex nozzle 12 and the rear vortex nozzle 13 can use the airflow provided by the air pump 16 to spray in one direction like a clockwise motion, continuously scouring the inner wall of the separator, thereby generating a high-speed rotating vortex in the water. The centrifugal force of the vortex can separate the mud and sand particles from the water flow, making it easier for the mud and sand to be sucked into the sand suction pipe 2, improving the sand discharge efficiency and avoiding excessive wear on mechanical parts. Example

[0027] Based on Example 1, the solution in Example 1 will be further described in detail below with reference to the specific working method, such as... Figures 1 to 4 As shown below, see details:

[0028] In a preferred embodiment, the two sets of front vortex nozzles 12 are tilted 45° to the left, and the two sets of rear vortex nozzles 13 are tilted 45° to the right. The two ends of the two sets of three-way pipes 14 away from the airflow pipe 11 are respectively connected to the two sets of front vortex nozzles 12 and the two sets of rear vortex nozzles 13. Furthermore, the front vortex nozzles 12 are tilted 45° to the left, and the rear vortex nozzles 13 are tilted 45° to the right. In this way, the vortex regions generated by the two sets of nozzles will complement each other. The two sets of nozzles are tilted in different directions, and the vortices they generate interact with each other, which can strengthen the centrifugal force field and expand the vortex coverage area of ​​the entire flushing and sand discharge area, so that more mud and sand can be affected by the vortex, reducing the dead angle of sand discharge. The three-way pipes 14 evenly distribute the airflow in the airflow pipe 11 to the two sets of front vortex nozzles 12 and the two sets of rear vortex nozzles 13.

[0029] In a preferred embodiment, the end of the air supply pipe 15 away from the airflow pipe 11 is connected to the output end of the air pump 16, and the inner main pipe 1 and the outer auxiliary pipe 5 are arranged in parallel vertically. Furthermore, the air supply pipe 15 stably delivers the gas generated by the air pump 16 to the airflow pipe 11, thereby providing a power source for the front vortex nozzle 12 and the rear vortex nozzle 13. The parallel arrangement of the inner main pipe 1 and the outer auxiliary pipe 5 can make more reasonable use of space, making the structure of the entire flushing and sand discharge pipeline more compact.

[0030] In a preferred embodiment, the two ends of the three sets of connecting main pipes 4 are respectively connected to the inner main pipe 1 and the outer secondary pipe 5, and the three sets of connecting main pipes 4 are arranged in an equidistant manner; furthermore, the three sets of connecting main pipes 4 increase the fluid flow area between the inner main pipe 1 and the outer secondary pipe 5, so that the sand-laden water can flow more smoothly from the inner main pipe 1 to the outer secondary pipe 5, and the equidistantly distributed connecting main pipes 4 can evenly distribute the water flow in the inner main pipe 1 to the outer secondary pipe 5.

[0031] In a preferred embodiment, the inner cavities at both ends of the double-headed sand suction port 3 are interconnected, and several groups of sand suction pipes 2 are arranged in an equidistant manner. Furthermore, the interconnection of the inner cavities at both ends allows the double-headed sand suction port 3 to simultaneously draw sand-containing water flow from two directions, increasing the sand suction range and flow rate. This can more effectively draw surrounding sand particles into the sand suction pipes 2, improving the sand suction capacity of the entire flushing and sand discharge pipeline, and helping to complete the sand discharge task more quickly. The equidistant distribution allows the sand suction pipes 2 on both sides of the inner main pipe 1 to evenly cover the area that needs sand suction. The sand suction range that each sand suction pipe 2 is responsible for is relatively independent and uniform, avoiding the problem of uneven sand particle suction caused by the sand suction pipes 2 being too concentrated or dispersed.

[0032] The working process of this utility model is as follows: First, in the initial state, the second electric valve 18 on the backflow flushing pipe 17 is closed, and the outlet electric valve 9 in the outlet 6 and the first electric valve 8 in the differential pressure pipe 7 are opened. At this time, there is a difference between the external pressure and the internal pressure of the separator. Due to the pressure difference, the external sand-containing water flow will be sucked in through the double-headed sand suction port 3 at the ends of several sets of sand suction pipes 2. The inner cavities at both ends of the double-headed sand suction port 3 are interconnected, and the sand-containing water flow can be sucked in from two directions at the same time, thus expanding the sand suction range and flow rate. Furthermore, several sets of sand suction pipes 2 are arranged at equal intervals on both sides of the inner main pipe 1, evenly covering the area that needs to be suctioned. This makes the sand suction range of each sand suction pipe 2 relatively independent and uniform, avoiding the problem of uneven sand suction caused by the sand suction pipes 2 being too concentrated or dispersed. It more effectively sucks the surrounding sand into the sand suction pipes 2 and then transports it to the inner main pipe 1. The inner main pipe 1 is the main transmission channel for mud and water flow. It concentrates the sand-containing water flow sucked in from the sand suction pipes 2. Three sets of connecting main pipes 4 are distributed at equal intervals and connected at both ends to the inner main pipe 1 and the external auxiliary pipe 5, respectively. This increases the fluid flow area between the inner main pipe 1 and the external auxiliary pipe 5. The equidistant distribution design allows the water flow in the inner main pipe 1 to be evenly distributed into the external auxiliary pipe 5, ensuring that the sand-containing water flow smoothly from the inner main pipe 1 to the external auxiliary pipe 5, completing the transition link in the sand discharge process.

[0033] The external auxiliary pipe 5 guides the sand-laden water flow to the outlet 6, which serves as the final sand discharge outlet of the flushing and desanding pipeline. The water flow is precisely controlled by the electric valve 9. When the pipeline is blocked by silt or when the separator needs to be flushed, the valve at the outlet 6 is closed, and the second electric valve 18 on the backflow flushing pipe 17 is opened. At this time, the externally connected water flow will flush the pipeline through the backflow flushing pipe 17 and enter the separator for sand flushing. Meanwhile, the gas generated by the air pump 16 is stably delivered to the airflow pipe 11 through the air supply pipe 15. The T-pipes 14 installed at both ends of the airflow pipe 11 evenly distribute the airflow to the two sets of front vortex nozzles 12 and the two sets of rear vortex nozzles 13. The front vortex nozzles 12 are tilted 45° to the left, and the rear vortex nozzles 13 are tilted 45° to the right. The two sets of nozzles use the airflow provided by the air pump 16 to spray, generating a high-speed rotating vortex in the water. Because the multiple nozzles are tilted in different directions, the vortices they generate interact to strengthen the centrifugal force field and expand the vortex coverage area of ​​the entire flushing and sand removal zone. This allows more sediment to be affected by the vortex, reducing dead zones in sand removal. The centrifugal force of the vortex can separate sediment particles from the water flow, making it easier for sediment to be sucked into the sand suction pipe 2, improving sand removal efficiency, and avoiding excessive wear on mechanical parts. The connecting support rod 10 provides a stable support structure for the front vortex nozzle 12 and the rear vortex nozzle 13, ensuring that the nozzles maintain a fixed position and angle during operation, guaranteeing the formation and effect of the vortex. The above is the working principle of this flushing and sand removal pipeline.

Claims

1. A sand washing pipeline comprising an inner main pipe (1), a double-head sand suction port (3), a front vortex nozzle (12) and a rear vortex nozzle (13), characterized in that: The inner main pipe (1) is provided with sand suction pipes (2) on both sides, the sand suction pipes (2) are provided with several groups, double-head sand suction mouths (3) are installed at one end of the sand suction pipes (2) away from the inner main pipe (1), the bottom of the inner main pipe (1) is provided with connecting main pipes (4), the connecting main pipes (4) are provided with three groups, the lower part of the connecting main pipes (4) is provided with external auxiliary pipes (5), the front end of the external auxiliary pipes (5) is provided with water outlets (6), the rear end of the external auxiliary pipes (5) is provided with reflux flushing pipes (17), the pipe body of the reflux flushing pipes (17) is provided with a second electric valve (18), the inner cavity of the water outlet (6) is provided with a water outlet electric valve (9), the left side of the water outlet (6) is provided with a differential pressure pipe (7), the inner cavity of the differential pressure pipe (7) is provided with a first electric valve (8); The outer sides of the two ends of the two groups of sand suction pipes (2) are welded with connecting support rods (10), the upper end of the inner main pipe (1) is provided with an airflow pipe (11), front vortex nozzles (12) are respectively installed at one end of the two groups of connecting support rods (10) away from the sand suction pipes (2), rear vortex nozzles (13) are respectively installed at one end of the two groups of connecting support rods (10) away from the sand suction pipes (2), the two ends of the airflow pipe (11) are provided with three-way pipes (14), the center of one side of the airflow pipe (11) is provided with a gas sending pipe (15), the right side of the gas sending pipe (15) is provided with a gas pump (16).

2. A sand washout line according to claim 1, characterized in that: The two groups of front vortex nozzles (12) are inclined to the left side by 45°, and the two groups of rear vortex nozzles (13) are inclined to the right side by 45°.

3. A sand washout line according to claim 2, characterized in that: The two ends of the two groups of three-way pipes (14) away from the airflow pipe (11) are respectively connected with the two groups of front vortex nozzles (12) and the two groups of rear vortex nozzles (13).

4. A sand washout line according to claim 1, characterized in that: The end of the gas sending pipe (15) away from the airflow pipe (11) is connected with the output end of the gas pump (16), and the inner main pipe (1) and the external auxiliary pipe (5) are arranged in parallel.

5. A sand washout line according to claim 1, characterized in that: The two ends of the three groups of connecting main pipes (4) are respectively connected with the inner main pipe (1) and the external auxiliary pipe (5), and the three groups of connecting main pipes (4) are arranged in an equidistant spacing manner.

6. A sand washout line according to claim 1, characterized in that: The inner cavities of the two ends of the double-head sand suction mouth (3) are connected with each other, and the several groups of sand suction pipes (2) are arranged in an equidistant spacing manner.

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