Gas-liquid sand combination separation and discharge device

Abstract

The utility model discloses a gas -liquid sand combination separation discharge device, it includes: the outer tube, the bottom of outer tube is provided with the water inlet, the inside fixed connection of outer tube has the middle pipe, the circumference of middle pipe is fixedly connected with middle filter screen, the inside fixed connection of middle pipe has the bottom plate, the top fixed connection of bottom plate has the inner tube. Through setting up outer tube, middle pipe, middle filter screen, inner tube, inner filter screen, filter ball, upper filter screen, bottom plate, air pump, air inlet pipe, air outlet pipe, gas -liquid separation membrane and water outlet pipe, the oil that adopts from the bottom of outer tube enters, filters and buffers through inner filter screen and filter ball, not only reduces its impact force, and after the filtration of layering, can fully filter out the sandstone in the oil, and under the action of air pump, the gas in the inside is extracted, completes gas -liquid separation, not only simpler structure, can better realize gas, liquid, sand separation, reduces the separation cost.

Description

Technical Field

[0001] This utility model relates to the field of gas-liquid-sand separation technology, and in particular to a gas-liquid-sand combined separation and discharge device. Background Technology

[0002] In oil extraction, most oil production utilizes beam pumps and plunger pumps. The pump draws water from the wellbore until the pressure is lower than the formation pressure, causing formation fluid to seep from the formation pores into the wellbore. The pump then lifts the gas-liquid-sand mixture from the wellbore to the surface. As the formation fluid rises and flows through the wellbore, its pressure gradually decreases, and dissolved gas gradually precipitates from the liquid. Because gases have strong expansion and compression properties, when gaseous liquid enters the pump, the expansion of the gas occupies space in the pump barrel. When the liquid is discharged, the compression of the gas affects the pump's discharge rate. This gas interference reduces pump efficiency, and severe gas interference can cause gas blockage. Sand-containing well fluids are prone to pump jamming. Therefore, it is necessary to separate the gas and sand in the oil.

[0003] Most existing gas-liquid-sand separation devices have complex structures, are difficult to separate, and are costly. Therefore, optimizing the structure of the separation device and reducing costs has become an urgent problem to be solved. Utility Model Content

[0004] The purpose of this invention is to provide a gas-liquid-sand combined separation and discharge device. The extracted oil enters from the bottom of the outer pipe and is filtered and buffered by the inner filter screen and filter balls, which not only reduces its impact force, but also fully filters out the sand and gravel inside the oil after stratified filtration. Under the action of the air pump, the internal gas is extracted to complete the gas-liquid separation. The structure is simpler and can better achieve the separation of gas, liquid and sand, and reduce the separation cost.

[0005] To achieve the above objectives, a gas-liquid-sand combined separation and discharge device is provided, comprising: an outer pipe, an inlet at the bottom of the outer pipe, a middle pipe fixedly connected inside the outer pipe, a middle filter screen fixedly connected to the circumference of the middle pipe, a base plate fixedly connected inside the middle pipe, an inner pipe fixedly connected to the top of the base plate, an inner filter screen fixedly connected inside the inner pipe, four inner filter screens evenly distributed vertically, three filter balls staggered with the inner filter screens inside the inner pipe, the filter balls being made of porous plastic, an upper filter screen fixedly connected to the top of the inner pipe, an air inlet pipe fixedly connected to the top of the outer pipe, an air pump fixedly connected to the top of the air inlet pipe, an air outlet pipe fixedly connected to the top of the air pump, a gas-liquid separation membrane fixedly connected to the top of the outer pipe, and a water outlet pipe fixedly connected to the circumference of the outer pipe.

[0006] According to the aforementioned gas-liquid-sand combined separation and discharge device, the inner filter screen is funnel-shaped with its opening facing downwards. The inner filter screen is made of stainless steel, and its mesh size increases exponentially from bottom to top. Through the layered filtration of the inner filter screen, sand and gravel of different sizes mixed in the oil can be filtered out, achieving liquid-sand separation. Furthermore, the buffering effect of the layers of inner filter screens greatly reduces the kinetic energy of the oil.

[0007] According to the aforementioned gas-liquid-sand combined separation and discharge device, the gas-liquid separation membrane is located inside the air inlet pipe. Gas-liquid separation can be performed from above.

[0008] According to the aforementioned gas-liquid-sand combined separation and discharge device, the top of the upper filter screen is fixedly connected to the outer pipe, and the upper filter screen is located above the inner filter screen.

[0009] According to the aforementioned gas-liquid-sand combined separation and discharge device, the middle filter screen is located below the inner filter screen, and the water outlet pipe is located below the middle filter screen.

[0010] According to the aforementioned gas-liquid-sand combined separation and emission device, the gas-liquid separation membrane is a nanoporous membrane. The nanoporous membrane achieves selective separation of gas and liquid through its unique pore structure and surface properties.

[0011] According to the aforementioned gas-liquid-sand combined separation and discharge device, the end of the water outlet pipe furthest from the outer pipe is connected to an external oil pumping system.

[0012] The above scheme has the following beneficial effects: By setting up an outer pipe, a middle pipe, a middle filter screen, an inner pipe, an inner filter screen, a filter ball, an upper filter screen, a bottom plate, an air pump, an air inlet pipe, an air outlet pipe, a gas-liquid separation membrane, and a water outlet pipe, the extracted oil enters from the bottom of the outer pipe. After being filtered and buffered by the inner filter screen and the filter ball, not only is its impact force reduced, but also after stratified filtration, the sand and gravel inside the oil can be fully filtered out. Under the action of the air pump, the internal gas is extracted to complete the gas-liquid separation. This not only simplifies the structure but also better achieves the separation of gas, liquid, and sand, reducing separation costs.

[0013] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0015] Figure 1 This is a front view of a gas-liquid-sand combined separation and discharge device according to this utility model;

[0016] Figure 2This is a cross-sectional view of a gas-liquid-sand combined separation and discharge device according to the present invention;

[0017] Figure 3 This is a schematic diagram of the inner pipe structure of a gas-liquid-sand combined separation and discharge device according to the present invention;

[0018] Figure 4 This is a front view of a gas-liquid-sand combined separation and discharge device according to the present invention.

[0019] Legend:

[0020] 1. Outer tube; 2. Middle tube; 3. Middle filter screen; 4. Inner tube; 5. Inner filter screen; 6. Filter ball; 7. Upper filter screen; 8. Base plate; 9. Air pump; 10. Air inlet pipe; 11. Air outlet pipe; 12. Gas-liquid separation membrane; 13. Water outlet pipe. Detailed Implementation

[0021] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0022] Reference Figure 1-4This utility model discloses a gas-liquid-sand combined separation and discharge device, comprising: an outer pipe 1 with a water inlet at its bottom; a middle pipe 2 fixedly connected inside the outer pipe 1; a middle filter screen 3 fixedly connected to the circumference of the middle pipe 2; a base plate 8 fixedly connected inside the middle pipe 2; an inner pipe 4 fixedly connected to the top of the base plate 8; and an inner filter screen 5 fixedly connected inside the inner pipe 4. Four inner filter screens 5 are evenly distributed vertically, are funnel-shaped with downward opening, and are made of stainless steel. The mesh size of the inner filter screens 5 is... The number of filters increases exponentially from bottom to top. The inner tube 4 contains three filter balls 6, which are staggered with the inner filter screen 5. The filter balls 6 are made of porous plastic. Passing oil impacts the filter balls 6, causing them to vibrate continuously between the upper and lower inner filter screens 5, thus reducing the kinetic energy of the oil. An upper filter screen 7 is fixedly connected to the top of the inner tube 4, and its top is fixedly connected to the outer tube 1. The upper filter screen 7 is located above the inner filter screen 5. An air inlet pipe 10 is fixedly connected to the top of the outer tube 1, and an air pump 9 is fixedly connected to the top of the air inlet pipe 10. An air outlet pipe 11 is fixedly connected to the top of the air pump 9, and a gas-liquid separation membrane 12 is fixedly connected to the top of the outer pipe 1. The gas-liquid separation membrane 12 is located inside the air inlet pipe 10. When the air pump 9 is started, a negative pressure is formed above the air inlet pipe 10, thereby creating a pressure difference above and below the gas-liquid separation membrane 12, allowing the gas to separate from the liquid more quickly. The gas-liquid separation membrane 12 is a nanoporous membrane. The nanoporous membrane achieves selective separation of gas and liquid through its special pore structure and surface properties. A water outlet pipe 13 is fixedly connected to the circumferential surface of the outer pipe 1. When the extracted oil enters the inner... When the oil passes through pipe 4, the oil is filtered by the layers of inner filter screen 5, which can filter out sand and gravel of different sizes mixed in the oil, thus achieving liquid-sand separation. Moreover, after being buffered by the layers of inner filter screen 5, the oil impacts the filter ball 6 during the process of passing through inner pipe 4, which further consumes the kinetic energy of the oil, thereby reducing the impact on the upper gas-liquid separation membrane 12, playing the role of mitigating the impact force and protecting the gas-liquid separation membrane 12. After being filtered, the oil flows from the upper filter screen 7 into the space between the middle pipe 2 and the inner pipe 4, and from the middle filter screen 3 into the space between the outer pipe 1 and the middle pipe 2, and flows out from the outlet pipe 13.

[0023] The middle filter screen 3 is located below the inner filter screen 5, and the water outlet pipe 13 is located below the middle filter screen 3. The end of the water outlet pipe 13 away from the outer pipe 1 is connected to the external oil pumping system.

[0024] Working principle: The end of the outlet pipe 13 furthest from the outer pipe 1 is connected to the external oil extraction system. The air pump 9 is connected to the external controller via a wire. When the extracted oil enters the inner pipe 4, it is filtered by the layers of the inner filter screen 5, which can filter out sand and gravel of different sizes mixed in the oil, thus achieving liquid-sand separation. Moreover, after being buffered by the layers of the inner filter screen 5, and as the oil passes through the inner pipe 4, it impacts the filter ball 6, further consuming the kinetic energy of the oil, thereby reducing the impact on the upper gas-liquid separation membrane 12. When the oil enters the top of the inner pipe 4, the air pump 9 is started, which can create a negative pressure above the air inlet pipe 10, thereby creating a pressure difference above and below the gas-liquid separation membrane 12, allowing the gas to separate from the liquid more quickly. After filtration, the oil flows from the upper filter screen 7 into the space between the middle pipe 2 and the inner pipe 4, then from the middle filter screen 3 into the space between the outer pipe 1 and the middle pipe 2, and finally flows out from the outlet pipe 13. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0025] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A gas-liquid-sand combined separation and discharge device, comprising: An outer pipe (1) is provided with an inlet at its bottom. The outer pipe (1) is characterized by having a middle pipe (2) fixedly connected inside it, a middle filter screen (3) fixedly connected to the circumference of the middle pipe (2), a base plate (8) fixedly connected inside the middle pipe (2), an inner pipe (4) fixedly connected to the top of the base plate (8), an inner filter screen (5) fixedly connected inside the inner pipe (4), and four inner filter screens (5) evenly distributed vertically. A filter ball (6) is provided inside the inner pipe (4). The number of filter balls (6) is set to three, and they are staggered with the inner filter screen (5). The filter balls (6) are made of porous plastic material. The top of the inner tube (4) is fixedly connected to the upper filter screen (7). The top of the outer tube (1) is fixedly connected to the air inlet pipe (10). The top of the air inlet pipe (10) is fixedly connected to the air pump (9). The top of the air pump (9) is fixedly connected to the air outlet pipe (11). The top of the outer tube (1) is fixedly connected to the gas-liquid separation membrane (12). The circumferential surface of the outer tube (1) is fixedly connected to the water outlet pipe (13).

2. The gas-liquid-sand combined separation and discharge device according to claim 1, characterized in that, The inner filter screen (5) is funnel-shaped with its opening facing downwards. The inner filter screen (5) is made of stainless steel and the mesh size of the inner filter screen (5) increases exponentially from bottom to top.

3. The gas-liquid-sand combined separation and discharge device according to claim 1, characterized in that, The gas-liquid separation membrane (12) is located inside the air inlet pipe (10).

4. The gas-liquid-sand combined separation and discharge device according to claim 1, characterized in that, The top of the upper filter screen (7) is fixedly connected to the outer tube (1), and the upper filter screen (7) is located above the inner filter screen (5).

5. The gas-liquid-sand combined separation and discharge device according to claim 1, characterized in that, The middle filter (3) is located below the inner filter (5), and the water outlet pipe (13) is located below the middle filter (3).

6. The gas-liquid-sand combined separation and discharge device according to claim 1, characterized in that, The gas-liquid separation membrane (12) is a nanoporous membrane.

7. The gas-liquid-sand combined separation and discharge device according to claim 1, characterized in that, The end of the outlet pipe (13) away from the outer pipe (1) is connected to the external oil pumping system.

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