Fracturing fluid treatment device for petroleum fracturing acidification and treatment process of fracturing fluid treatment device

Abstract

The invention discloses a fracturing fluid treatment device for petroleum fracturing acidizing and a treatment process thereof, the fracturing fluid treatment device comprises a tank body, the interior of the tank body is fixedly connected with a first filter screen, the first filter screen is obliquely arranged, and the bottom end of the first filter screen is provided with a concave arc filter screen; the top of the tank body is fixedly connected with a motor, the output end of the motor is fixedly connected with a rotating shaft, the side surface of the rotating shaft is fixedly connected with a stirring rod, the stirring rod is internally provided with an air channel, the rotating shaft is internally provided with an air channel, and the air channel is connected with the air channel; the top of the tank body is fixedly connected with an air pump, the output end of the air pump is fixedly connected with an air cavity through a pipeline, and the air cavity communicates with the air duct through a connecting hole; a transverse plate is fixedly connected to the interior of the tank body, and a circulating hole is formed in the transverse plate. Through the compact structural design, the working procedures of filtration, alkalization, flocculation, oxidation, filtration and the like of the used fracturing fluid can be effectively achieved, the occupied area is small, and treatment is faster and more convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of fracturing fluid treatment, and in particular to a fracturing fluid treatment device and a treatment process thereof for petroleum fracturing and acidification. Background Art

[0002] Acid fracturing is referred to as acid fracturing. It is a process of fracturing without proppant using acid as fracturing fluid at a pressure higher than the formation fracture pressure. During the acid fracturing process, the wall of the crack is corroded into an uneven surface by the dissolution effect of the acid, so that the wall of the crack will not be completely closed after the pump is stopped and the pressure is released. Therefore, it has a higher conductivity and is effective in restoring and improving the production capacity of oil wells.

[0003] The fracturing fluid needs to be recycled and processed after use. The existing fracturing fluid processing device uses one device for each processing step, which makes the device occupy a large space and has a slow processing speed. At the same time, the exhaust gas generated during the oxidation process is discharged slowly, affecting the internal flocculation process and having viscosity, which makes it mix slowly. Summary of the invention

[0004] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art, and to provide a fracturing fluid treatment device and a treatment process for petroleum fracturing and acidification. Through a compact structural design, the filtration, alkalization, flocculation, oxidation, filtration and other processes of the used fracturing fluid can be effectively realized, and the device occupies a small area and the treatment is faster and more convenient.

[0005] The present invention also provides a fracturing fluid processing device for petroleum fracturing and acidification, comprising: a tank body, a first filter screen is fixedly connected to the inside of the tank body, the first filter screen is arranged obliquely, and a concave arc filter screen is provided at the bottom end of the first filter screen; a motor is fixedly connected to the top of the tank body, a rotating shaft is fixedly connected to the output end of the motor, a stirring rod is fixedly connected to the side surface of the rotating shaft, an air channel is provided inside the stirring rod, an air channel is provided inside the rotating shaft, and the air channel is connected to the air channel; an air pump is fixedly connected to the top of the tank body, an air cavity is fixedly connected to the output end of the air pump through a pipeline, and the air cavity is connected to the air channel through a connecting hole; a transverse plate is fixedly connected to the inside of the tank body, a flow hole is provided inside the transverse plate, a second filter screen is fixedly connected to the lower surface of the transverse plate, the structure of the second filter screen is the same as that of the first filter screen, and a discharge port is provided at the bottom of the tank body.

[0006] According to a fracturing fluid processing device for petroleum fracturing and acidification provided by the present invention, a feed hopper is fixedly connected to the top of the tank body, and the feed hopper is communicated with the interior of the tank body.

[0007] According to a fracturing fluid processing device for petroleum fracturing and acidification provided by the present invention, a hopper is fixedly connected to the side surface of the tank body, the hopper is located below the first filter screen, and the hopper is connected to the tank body.

[0008] According to a fracturing fluid processing device for petroleum fracturing and acidification provided by the present invention, the inside of the feed hopper and the charging hopper are fixedly connected with a sealing port, the sealing port includes a spring, one end of the spring is fixedly connected to the surface of the feed hopper, and the end of the spring away from the feed hopper is fixedly connected to a baffle, and the baffle is rotatably connected to the feed hopper.

[0009] According to a fracturing fluid processing device for petroleum fracturing and acidification provided by the present invention, a pull plate is provided on the surface of the circular arc filter, a connecting rod is fixedly connected to the side surface of the pull plate, a closing cover is provided at one end of the connecting rod, a sealing strip is provided at the connection between the closing cover and the tank body, and the closing cover is located outside the tank body.

[0010] According to the fracturing fluid processing device for petroleum fracturing and acidification provided by the present invention, the discharge port and the inside of the flow hole are both provided with electric control valves.

[0011] According to a fracturing fluid processing device for petroleum fracturing and acidification provided by the present invention, a medicine storage box is fixedly connected to the surface of the feeding hopper, and a medicine outlet is arranged on the side surface of the medicine storage box.

[0012] According to a fracturing fluid processing device for petroleum fracturing and acidification provided by the present invention, a gas processing device is arranged on the upper surface of the tank body, and the gas processing device is connected to the tank body through a gas outlet.

[0013] A fracturing fluid treatment process for petroleum fracturing acidification, using the fracturing fluid treatment device as described above, comprises the following steps:

[0014] S1. Put the used fracturing fluid into the tank through the feed hopper, filter the solids in the fracturing fluid through the first filter, so that the particles fall into the arc filter, and the liquid falls through the bottom of the arc filter;

[0015] S2. The filtered liquid falls into the tank, is stirred by a stirring rod, and then alkali solution is added through a hopper, and the acidity is reduced by stirring with a stirring rod;

[0016] S3. After a period of alkalization, a flocculant is added through a hopper to continue stirring. During the stirring process, an air pump is used to inflate the interior to form dense bubbles, increase its fluidity, flocculate the internal debris to form particles, and add the corresponding oxidant again to continue stirring;

[0017] S4. The fracturing fluid after flocculation flows downward through the flow hole and falls onto the second filter screen, where the flocculated impurities inside are filtered, thereby completing the corresponding treatment;

[0018] S5. The gas generated during the treatment process enters the gas treatment device through the gas outlet, so that the harmful gas generated is treated and then discharged.

[0019] Beneficial Effects

[0020] 1. The present invention can effectively realize the filtering, alkalization, flocculation, oxidation, filtering and other processes of the used fracturing fluid through a compact structural design, and occupies a small area and is faster and more convenient to process.

[0021] 2. The present invention adds gas through an air pump during the stirring process, so that the contact area inside the stirring process is expanded, and the gas generated inside is quickly taken out during the flocculation and oxidation process, thereby accelerating the contact and speeding up the reaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention is further described below in conjunction with the accompanying drawings and embodiments;

[0023] Figure 1 This is an overall structural diagram of a fracturing fluid processing device for petroleum fracturing and acidification according to the present invention;

[0024] Figure 2 The present invention is a fracturing fluid processing device for petroleum fracturing acidification Figure 1 Structure diagram at A in the middle;

[0025] Figure 3 The present invention is a fracturing fluid processing device for petroleum fracturing acidification Figure 1 Structure diagram at B in the middle;

[0026] Figure 4 This is an internal structural diagram of a fracturing fluid processing device for petroleum fracturing and acidification according to the present invention;

[0027] Figure 5 The present invention is a diagram of the air duct structure of the fracturing fluid treatment device for petroleum fracturing and acidification.

[0028] Legend:

[0029] 1. Tank body; 2. First filter screen; 3. Arc filter screen; 4. Motor; 5. Rotating shaft; 6. Stirring rod; 7. Air duct; 8. Air duct; 9. Air pump; 10. Air cavity; 11. Horizontal plate; 12. Flow hole; 13. Second filter screen; 14. Discharge port; 15. Feed hopper; 16. Adding hopper; 17. Sealing port; 171. Spring; 172. Baffle; 18. Pull plate; 19. Connecting rod; 20. Closing cover; 21. Electric control valve; 22. Medicine storage box; 23. Medicine discharge port; 24. Gas treatment device. DETAILED DESCRIPTION

[0030] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0031] Reference Figure 1-5 The embodiment of the present invention is a fracturing fluid processing device for petroleum fracturing acidification, which includes: a tank body 1, a place for fracturing fluid processing, a first filter screen 2 is fixedly connected inside the tank body 1 to filter initial particulate debris, the first filter screen 2 is arranged obliquely to filter particulate matter and make it fall into the arc filter screen 3, a concave arc filter screen 3 is arranged at the bottom end of the first filter screen 2 to hold particulate matter, and the low-lying part of the first filter screen 2 allows liquid to fall along the bottom end of the arc to prevent liquid from leaking along the edge of the first filter screen 2; a motor 4 is fixedly connected to the top of the tank body 1 to drive a rotating shaft 5 to rotate, the output end of the motor 4 is fixedly connected to the rotating shaft 5, the side surface of the rotating shaft 5 is fixedly connected to a stirring rod 6 to stir the fracturing fluid, an air channel 7 is arranged inside the stirring rod 6, and the rotating shaft 5 is rotated. An air duct 8 is provided inside the rotating shaft 5, and the air duct 7 is connected to the air duct 8 to facilitate the introduction of gas; an air pump 9 is fixedly connected to the top of the tank body 1 to introduce gas, and the output end of the air pump 9 is fixedly connected to an air cavity 10 through a pipeline, and the air cavity 10 is installed on the surface of the rotating shaft 5. The air cavity 10 is connected to the air duct 8 through a connecting hole to facilitate the circulation of gas; a transverse plate 11 is fixedly connected to the inside of the tank body 1 to separate it into corresponding spaces, and a circulation hole 12 is provided inside the transverse plate 11 to facilitate internal circulation, and a second filter screen 13 is fixedly connected to the lower surface of the transverse plate 11 to continue filtering the treated fracturing fluid. The structure of the second filter screen 13 is the same as that of the first filter screen 2, and the same principle is adopted for filtering. A discharge port 14 is provided at the bottom of the tank body 1 to facilitate the discharge of the treated liquid.

[0032] A feed hopper 15 is fixedly connected to the top of the tank body 1 to facilitate the entry of untreated fracturing fluid. The feed hopper 15 is connected to the interior of the tank body 1 to facilitate entry into the interior of the tank body 1 .

[0033] A hopper 16 is fixedly connected to the side surface of the tank body 1 for convenient addition of corresponding auxiliary materials. The hopper 16 is located below the first filter screen 2 for convenient addition of auxiliary materials directly into the liquid to be treated without filtering. The hopper 16 is connected to the tank body 1.

[0034] The inside of the feed hopper 15 and the charging hopper 16 are both fixedly connected with a sealing port 17 to prevent the internal gas from escaping. The sealing port 17 includes a spring 171 to provide a closing force. One end of the spring 171 is fixedly connected to the surface of the feed hopper 15. The end of the spring 171 away from the feed hopper 15 is fixedly connected with a baffle 172 to close the feed hopper 15. The baffle 172 is rotatably connected to the feed hopper 15.

[0035] A pull plate 18 is provided on the surface of the arc filter 3 to push and pull impurities. A connecting rod 19 is fixedly connected to the side surface of the pull plate 18 to facilitate pulling. A closing cover 20 is provided at one end of the connecting rod 19 to close the side opening, thereby facilitating pulling of the pull plate 18. A sealing strip is provided at the connection between the closing cover 20 and the tank body 1 to form a sealing effect, and the closing cover 20 is located outside the tank body 1.

[0036] The discharge port 14 and the flow hole 12 are both provided with an electric control valve 21, and the discharge and discharge thereof are controlled by a doubling lever.

[0037] A medicine storage box 22 is fixedly connected to the surface of the feeding hopper 16 to store medicines such as flocculants, alkalizers, oxidants, etc. A medicine outlet 23 is provided on the side surface of the medicine storage box 22 to facilitate the discharge of the medicines.

[0038] A gas treatment device 24 is provided on the upper surface of the tank body 1, and a conventional gas treatment and absorption device in the art is used to treat the gas. The gas treatment device 24 is connected to the tank body 1 through the gas outlet to facilitate the circulation of the gas and meet the emission standards.

[0039] The fracturing fluid treatment process for petroleum fracturing and acidification of this embodiment uses the fracturing fluid treatment device as described above, and includes the following steps:

[0040] S1. The used fracturing fluid is placed into the tank body 1 through the feed hopper 15, and the solids in the fracturing fluid are first filtered through the first filter 2, so that the particles fall into the arc filter 3, and the liquid falls through the bottom of the arc filter 3;

[0041] S2. The filtered liquid falls into the interior of the tank 1, is stirred by the stirring rod 6, and then the alkali solution is added through the hopper 16, and stirred by the stirring rod 6, thereby reducing its acidity;

[0042] S3. After a period of alkalization, a flocculant is added through the hopper 16, thereby continuing to stir. During the stirring process, the interior is inflated by the air pump 9 to form dense bubbles, increase its fluidity, flocculate the internal debris to form particles, add the corresponding oxidant again, and continue stirring;

[0043] S4. The fracturing fluid after flocculation flows downward through the flow hole 12 and falls onto the second filter screen 13, where the flocculated impurities are filtered to complete the corresponding treatment;

[0044] S5. The gas generated during the treatment process enters the gas treatment device 24 through the gas outlet, so that the harmful gas generated is treated and then discharged.

[0045] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A fracturing fluid processing device for petroleum fracturing and acidification, characterized in that: include: A tank body (1), wherein a first filter screen (2) is fixedly connected to the inside of the tank body (1), the first filter screen (2) is arranged obliquely, and a concave arc filter screen (3) is provided at the bottom end of the first filter screen (2); A motor (4) is fixedly connected to the top of the tank body (1); a rotating shaft (5) is fixedly connected to the output end of the motor (4); a stirring rod (6) is fixedly connected to the side surface of the rotating shaft (5); an air duct (7) is arranged inside the stirring rod (6); an air duct (8) is arranged inside the rotating shaft (5); and the air duct (7) is connected to the air duct (8); An air pump (9) is fixedly connected to the top of the tank body (1); an output end of the air pump (9) is fixedly connected to an air cavity (10) via a pipeline; and the air cavity (10) is connected to the air duct (8) via a connecting hole; A transverse plate (11) is fixedly connected to the interior of the tank body (1), a flow hole (12) is provided inside the transverse plate (11), a second filter screen (13) is fixedly connected to the lower surface of the transverse plate (11), the structure of the second filter screen (13) is the same as that of the first filter screen (2), and a discharge port (14) is provided at the bottom of the tank body (1).

2. A fracturing fluid processing device for petroleum fracturing and acidification according to claim 1, characterized in that: A feed hopper (15) is fixedly connected to the top of the tank body (1), and the feed hopper (15) is communicated with the interior of the tank body (1).

3. A fracturing fluid processing device for petroleum fracturing and acidification according to claim 2, characterized in that: A feeding hopper (16) is fixedly connected to the side surface of the tank body (1); the feeding hopper (16) is located below the first filter screen (2); and the feeding hopper (16) is in communication with the tank body (1).

4. A fracturing fluid processing device for petroleum fracturing and acidification according to claim 3, characterized in that: The inside of the feed hopper (15) and the charging hopper (16) are both fixedly connected with a blocking port (17), and the blocking port (17) includes a spring (171), one end of the spring (171) is fixedly connected to the surface of the feed hopper (15), and the end of the spring (171) away from the feed hopper (15) is fixedly connected with a baffle (172), and the baffle (172) is rotatably connected to the feed hopper (15).

5. The fracturing fluid processing device for petroleum fracturing and acidification according to claim 1, characterized in that: A pull plate (18) is provided on the surface of the arc filter (3), a connecting rod (19) is fixedly connected to the side surface of the pull plate (18), a closing cover (20) is provided at one end of the connecting rod (19), a sealing strip is provided at the connection between the closing cover (20) and the tank body (1), and the closing cover (20) is located outside the tank body (1).

6. The fracturing fluid processing device for petroleum fracturing and acidification according to claim 1, characterized in that: The discharge port (14) and the circulation hole (12) are both provided with an electric control valve (21) inside.

7. The fracturing fluid processing device for petroleum fracturing and acidification according to claim 3, characterized in that: A medicine storage box (22) is fixedly connected to the surface of the feeding hopper (16), and a medicine outlet (23) is provided on the side surface of the medicine storage box (22).

8. The fracturing fluid processing device for petroleum fracturing and acidification according to claim 1, characterized in that: A gas processing device (24) is provided on the upper surface of the tank body (1), and the gas processing device (24) is connected to the tank body (1) via a gas outlet.

9. A fracturing fluid treatment process for petroleum fracturing and acidification, characterized in that: The fracturing fluid processing device according to claims 1 to 8 comprises the following steps: S1. The used fracturing fluid is placed into the tank (1) through the feed hopper (15), and the solids in the fracturing fluid are filtered through the first filter (2), so that the particles fall into the arc filter (3), and the liquid falls through the bottom of the arc filter (3); S2. The filtered liquid falls into the tank (1), is stirred by a stirring rod (6), and then an alkali solution is added through a hopper (16), and stirred by a stirring rod (6), thereby reducing its acidity; S3. After a period of alkalization, a flocculant is added through a hopper (16), and stirring is continued. During the stirring process, the interior is inflated by an air pump (9) to form dense bubbles, increase its fluidity, flocculate the internal debris to form particles, and add the corresponding oxidant again, and continue stirring; S4. The fracturing fluid after flocculation flows downward through the flow hole (12) and falls onto the second filter (13), where the flocculated impurities inside are filtered, thereby completing the corresponding treatment; S5. The gas generated during the treatment process enters the gas treatment device (24) through the gas outlet, so that the harmful gas generated is treated and then discharged.

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