Oil and gas field fracturing flow-back fluid treatment equipment

Abstract

The utility model belongs to the technical field of oil and gas field flow-back fluid treatment, and particularly relates to oil and gas field fracturing flow-back fluid treatment equipment which comprises a fixed base, a flocculation structure and a filtering structure, the input end of the filtering structure is connected with the output end of the flocculation structure, and a circulation assembly is arranged between the input end and the output end of the filtering structure; the circulating assembly comprises a two-in-one transfer pipe, a discharge pipe is arranged on one side of the top end of the two-in-one transfer pipe, a sixth conveying pipe is arranged on the other side of the top end of the two-in-one transfer pipe, and the sixth conveying pipe is connected with the output end of the flocculation structure; a fifth conveying pipe is arranged at the bottom end of the two-in-one adapter and is connected with the output end of the filtering structure; the flocculation structure in the treatment equipment can gather suspended solids in the flow-back liquid into large flocs, separation is convenient, meanwhile, the built-in filtering structure and the circulating assembly can conduct circulating filtering treatment on the flow-back liquid multiple times, impurity precipitation is reduced, the flow-back liquid reaches the discharge standard or the reuse standard, the environment is protected, and water resources are saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil and gas field flowback fluid treatment, in particular to oil and gas field fracturing flowback fluid treatment equipment. Background Art

[0002] During the oil and gas extraction process, a mixture known as "flowback fluid" is produced. This is the liquid containing solid matter that flows back from the borehole after the fracturing operation. Its main sources include wastewater from well flushing operations before and after construction and waste fluids after the fracturing project. This wastewater primarily contains guar gum, preservatives, breakers, crude oil, and other additives. It is characterized by high water consumption, large pollutant emissions, and a complex composition.

[0003] The primary challenge facing current oil and gas field flowback treatment equipment is its insufficient filtration capacity. This often makes it difficult to effectively treat the complex suspended matter and minute impurities in the flowback fluid, resulting in treated wastewater failing to achieve the desired cleanliness level. For example, suspended matter such as solid particles, colloids, and incompletely decomposed additives not only affects water quality but can also negatively impact subsequent treatment processes. Therefore, improving the filtration efficiency of existing equipment and developing more advanced technologies and materials are key to addressing the flowback treatment challenges in my country's oil and gas pipeline networks. Utility Model Content

[0004] In response to the above-mentioned deficiencies in the prior art, the utility model provides an oil and gas field fracturing flowback fluid processing equipment, which solves the problem that the existing oil and gas field flowback fluid processing equipment has low filtration capacity during the treatment process and is unable to completely filter out the complex and changeable suspended matter and tiny impurities in the flowback fluid, thereby affecting the water quality and subsequent treatment process.

[0005] In order to achieve the above purpose, the technical solution adopted by the present utility model is:

[0006] Provided is an oil and gas field fracturing flowback fluid processing equipment, comprising a fixed base and a flocculation structure and a filtration structure arranged on the fixed base, wherein the input end of the filtration structure is connected to the output end of the flocculation structure, and a circulation component is arranged between the input end and the output end of the filtration structure;

[0007] The circulation component includes a two-in-one adapter tube, a discharge pipe is provided on one side of the top of the two-in-one adapter tube, and a sixth transmission tube is provided on the other side of the top, and the sixth transmission tube is connected to the output end of the flocculation structure; a fifth transmission tube is provided at the bottom end of the two-in-one adapter tube, and the fifth transmission tube is connected to the output end of the filtration structure.

[0008] The beneficial effects of adopting the above technical solution are as follows: the fixed base serves as the supporting component of the entire equipment, which can ensure the stability and safety of the equipment during use; the flocculation structure can gather the suspended matter in the return liquid into larger flocs, which is convenient for subsequent separation machine to remove, and the flocculation structure performs a single filtration, which is beneficial to reducing the filtration intensity of the filtration structure; the return liquid after filtration by the flocculation structure enters the filtration structure, and is filtered twice by the filtration structure. The return liquid after the secondary filtration enters the two-in-one adapter in the circulation component from the output end of the filtration structure, and by first closing the discharge pipe and opening the sixth transmission pipe, the return liquid after the secondary filtration is input into the sixth transmission pipe through the fifth transmission pipe, and is transported to the input end of the filtration structure by the sixth transmission pipe to realize multiple circulation filtration treatment of the return liquid, further removing suspended matter, colloidal substances and tiny impurities in the return liquid, so that the return liquid meets the discharge standard or reuse standard, and then by closing the sixth transmission pipe and opening the valve of the discharge pipe, the return liquid that meets the standard after multiple circulation filtration is discharged through the discharge pipe.

[0009] Through the synergistic effect between the flocculation structure, the filtration structure and the circulation components, the return fluid can be circulated and filtered multiple times in the filtration structure, effectively reducing the precipitation of impurities, greatly improving the filtration efficiency and filtration effect of the oil and gas field fracturing return fluid, and making the return fluid meet the discharge standard or reuse standard, so as to protect the environment and save water resources.

[0010] Furthermore, a first valve is provided between the discharge pipe and the two-in-one transfer pipe, and a second valve is provided between the sixth transmission pipe and the two-in-one transfer pipe.

[0011] The beneficial effects of adopting the above technical solution are: the first valve is used to control the opening and closing of the discharge pipe, and the second valve is used to control the opening and closing of the sixth transmission pipe. The first valve and the second valve can flexibly switch between the discharge pipe and the sixth transmission pipe, thereby realizing precise control of the return liquid treatment process to improve the overall treatment efficiency.

[0012] Furthermore, the flocculation structure includes a first transmission tube and several flocculation tubes, which are arranged at the bottom of the first transmission tube. One end of the first transmission tube is connected to the liquid inlet tube, and the other end is connected to the second transmission tube. The middle section of the second transmission tube is connected to the sixth transmission tube.

[0013] The beneficial effects of adopting the above technical solution are: the liquid inlet pipe serves as a connecting pipe between the equipment and the external return liquid input, and the return liquid to be treated can be input into the flocculation structure. The input return liquid enters the flocculation tube through the first transmission pipe. After being treated by specific physical or chemical methods, the suspended matter in the return liquid can be aggregated into larger flocs, which is convenient for subsequent filtration treatment and greatly improves the removal efficiency of suspended matter; and the sixth transmission pipe serves as a connecting pipe connecting the second transmission pipe and the filtration structure, and can reintroduce the return liquid that needs multiple cycles of filtration treatment into the filtration structure, effectively improving the filtration effect.

[0014] Furthermore, a first control valve is provided between the liquid inlet pipe and the first transmission pipe, a second control valve is provided between the first transmission pipe and the second transmission pipe, and a third control valve is provided between the second transmission pipe and the sixth transmission pipe.

[0015] The beneficial effects of adopting the above technical solution are: the first control valve is used to control the opening and closing of the liquid inlet pipe, the second control valve is used to control the opening and closing of the second transmission pipe, and the third control valve is used to control the opening and closing of the output end of the sixth transmission pipe, and the first control valve, the second control valve and the third control valve can control the delivery volume of the return liquid to avoid the problem of poor treatment effect caused by excess or insufficient amount.

[0016] Furthermore, the filtration structure includes a circulation pump and a filter cartridge connected to the circulation pump. A third transmission pipe is provided at one end of the circulation pump, and a fourth transmission pipe is provided at the other end. The fourth transmission pipe is connected to the bottom end of the filter cartridge, and the top end of the filter cartridge is connected to the fifth transmission pipe; the third transmission pipe is connected to one end of the second transmission pipe.

[0017] The beneficial effects of adopting the above technical solution are: the circulation pump can ensure that the return liquid flows smoothly to the filter cartridge, the filter cartridge can effectively filter and remove suspended matter, colloidal substances and tiny impurities in the return liquid, and the fifth transmission pipe can introduce the filtered return liquid into the circulation pipeline to achieve the discharge or multiple filtration of the return liquid.

[0018] Furthermore, a fourth control valve is provided between the circulation pump and the fourth transmission pipe.

[0019] The beneficial effects of this technical solution are: by adjusting the opening of the fourth control valve, the flow rate of the backflow fluid can be precisely controlled to meet the needs of different treatment stages. Furthermore, during equipment maintenance or troubleshooting, closing the fourth control valve can quickly cut off the flow of the backflow fluid, ensuring the safety of operators.

[0020] In summary, the oil and gas field fracturing flowback fluid processing equipment provided by the utility model has the following beneficial effects:

[0021] (1) The flowback fluid treatment equipment can realize multiple circulation filtration treatment of the flowback fluid in the filtration structure through the synergistic effect between the flocculation structure, the filtration structure and the circulation components, effectively reducing the precipitation of impurities, greatly improving the filtration efficiency and filtration effect of the oil and gas field fracturing flowback fluid, and making the flowback fluid meet the discharge standard or reuse standard, so as to protect the environment and save water resources.

[0022] (2) The circulation component in the return liquid treatment equipment can realize multiple circulation filtration of the return liquid by flexibly switching between the discharge pipe and the sixth transmission pipe, which greatly improves the filtration effect of suspended matter, colloidal substances and tiny impurities in the return liquid, not only improving the water quality, but also greatly reducing the waste of water resources.

[0023] (3) The flocculation structure in the return liquid treatment equipment can aggregate the suspended matter in the return liquid into larger flocs through physical or chemical methods, which is beneficial for subsequent treatment by the separator.

[0024] (4) The filtration structure in the return liquid treatment equipment can effectively filter and remove suspended matter, colloidal substances and tiny impurities in the return liquid through the filter cartridge, greatly improving the cleanliness of the water quality. The circulating pump ensures the circulation of the return liquid in the filter cartridge, making the filtration process more sufficient and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the utility model of oil and gas field fracturing flowback fluid processing equipment Figure 1 ;

[0026] Figure 2 This is a schematic diagram of the utility model of oil and gas field fracturing flowback fluid processing equipment Figure 2 ;

[0027] Figure 3 This is a schematic diagram of the utility model of oil and gas field fracturing flowback fluid processing equipment Figure 3 ;

[0028] Among them, 1. Fixed base; 2. Flocculation structure; 21. Liquid inlet pipe; 22. First control valve; 23. First transmission pipe; 24. Flocculation pipe; 25. Second control valve; 26. Second transmission pipe; 27. Third control valve; 28. Third transmission pipe; 29. Sixth transmission pipe; 3. Filter structure; 31. Circulation pump; 32. Fourth control valve; 33. Fourth transmission pipe; 34. Filter cartridge; 35. Discharge pipe; 36. Fifth transmission pipe; 37. Two-in-one adapter pipe; 38. First valve; 39. Second valve. DETAILED DESCRIPTION

[0029] The specific implementation methods of the present invention are described below to facilitate understanding of the present invention by those skilled in the art. However, it should be clear that the present invention is not limited to the scope of the specific implementation methods. For those skilled in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the appended claims, these changes are obvious, and all utility model creations using the concept of the present invention are protected.

[0030] like Figures 1 to 3 As shown, the oil and gas field flowback fluid processing equipment provided by the present invention includes a fixed base 1 and a flocculation structure 2 and a filter structure 3 arranged on the fixed base 1. The input end of the filter structure 3 is connected to the output end of the flocculation structure 2, and a circulation component is provided between the input end and the output end of the filter structure 3;

[0031] The built-in flocculation structure 2 of the equipment can aggregate the suspended matter in the return liquid into larger flocs, perform a single filtration, and facilitate separation. At the same time, the built-in filtration structure 3 can perform a secondary filtration on the return liquid treated by the flocculation structure 2, and the circulation component can circulate the return liquid filtered by the filtration structure 3 into the filtration structure 3 for multiple circulation filtration treatments, thereby reducing the precipitation of impurities and making the return liquid meet the discharge or reuse standards, so as to protect the environment and save water resources.

[0032] As question 1 and Figure 2 As shown, the flocculation structure 2 includes a first transmission pipe 23 and a plurality of flocculation tubes 24. The flocculation tubes 24 are arranged at the bottom end of the first transmission pipe 23, and three groups are provided. One end of the first transmission pipe 23 is connected to the liquid inlet pipe 21, and the other end is connected to the second transmission pipe 26; and a first control valve 22 is provided between the liquid inlet pipe 21 and the first transmission pipe 23, and a second control valve 25 is provided between the first transmission pipe 23 and the second transmission pipe 26; the liquid inlet pipe 21 serves as a connecting pipe for the equipment and the external return liquid input, and the return liquid to be treated can be input into the flocculation structure 2. The input return liquid enters the flocculation tube 24 through the first transmission pipe 23. After being treated by specific physical or chemical methods, the suspended matter in the return liquid can be aggregated into larger flocs, which is convenient for subsequent filtration treatment, thereby greatly improving the removal efficiency of the suspended matter.

[0033] like Figure 2 and Figure 3 As shown, the filtration structure 3 includes a circulation pump 31 and a filter cartridge 34 connected to the circulation pump 31. A third transmission pipe 28 is provided at one end of the circulation pump 31, and a fourth transmission pipe 33 is provided at the other end. The fourth transmission pipe 33 is connected to the bottom end of the filter cartridge 34, and the third transmission pipe 28 is connected to one end of the second transmission pipe 26; and a fourth control valve 32 is provided between the circulation pump 31 and the fourth transmission pipe 33; the circulation pump 31 can ensure that the return liquid flows smoothly to the filter cartridge 34, and the filter cartridge 34 can effectively filter and remove suspended matter, colloidal substances and tiny impurities in the return liquid. The filtered return liquid is introduced into the circulation component to realize the discharge or multiple filtration of the return liquid.

[0034] like Figure 2 and Figure 3 As shown, the circulation component includes a two-in-one transfer tube 37, a discharge pipe 35 is provided on one side of the top of the two-in-one transfer tube 37, and a sixth transmission pipe 29 is provided on the other side of the top, and the sixth transmission pipe 29 is connected to the middle section of the second transmission pipe 26; a fifth transmission pipe 36 is provided at the bottom end of the two-in-one transfer tube 37, and the fifth transmission pipe 36 is connected to the top of the filter cartridge 34; and a first valve 38 is provided between the discharge pipe 35 and the two-in-one transfer tube 37, a second valve 39 is provided between the sixth transmission pipe 29 and the two-in-one transfer tube 37, and a third control valve 27 is provided between the sixth transmission pipe 29 and the second transmission pipe 26.

[0035] The return liquid after being filtered by the filter structure 3 enters the two-in-one adapter pipe 37 in the circulation component from the output end of the filter structure 3. By first closing the discharge pipe 35 and opening the sixth transmission pipe 29, the return liquid after the secondary filtration is input into the sixth transmission pipe 29 through the fifth transmission pipe 36, and is transported to the input end of the filter structure 3 by the sixth transmission pipe 29, so as to realize multiple circulation filtration treatment of the return liquid, further remove suspended matter, colloidal substances and tiny impurities in the return liquid, and make the return liquid meet the discharge standard or reuse standard. Then, by closing the sixth transmission pipe 29 and opening the valve of the discharge pipe 35, the return liquid that has been filtered multiple times and meets the standard is discharged through the discharge pipe 35.

[0036] The working method of the present invention is as follows: first, the backflow liquid discharge pipe 35 is assembled and fixed with the liquid inlet pipe 21, and the backflow liquid enters the flocculation pipe 24 through the first transmission pipe 23, and the second control valve 25 is closed, so that the flocculation pipe 24 performs flocculation treatment on the suspended matter in the backflow liquid, that is, a primary filtration. After the treatment is completed, the second control valve 25 is opened, and the third control valve 27 is closed at the same time, so that the backflow liquid enters the circulation pump 31 through the third transmission pipe 28, and then enters the filter cartridge 34 through the fourth transmission pipe 33 for secondary filtration treatment. At this time, the third control valve 27 and the second valve 39 are opened, and the second control valve 25 and the first valve 38 are closed, so that the third control valve 27 and the second valve 39 are opened. The transmission pipe 28, the circulation pump 31, the fourth transmission pipe 33, the filter cartridge 34, the fifth transmission pipe 36, the two-in-one adapter pipe 37, and the sixth transmission pipe 29 realize a closed pipeline. At this time, under the action of the circulation pump 31, the return liquid in the closed pipeline passes through the filter cartridge 34 for filtering treatment multiple times. After the filtering treatment is completed, the first valve 38 and the second control valve 25 are opened, and the second valve 39 and the third control valve 27 are closed. At this time, under the action of the circulation pump 31, the return liquid flows upward from the filter cartridge 34 into the fifth transmission pipe 36, and enters the discharge pipe 35 through the two-in-one adapter pipe 37, completing the outward discharge, thereby realizing the entire treatment process of the return liquid.

[0037] In summary, the oil and gas field fracturing return fluid processing equipment provided by the utility model can realize multiple circulation filtration treatment of the return fluid in the filtration structure 3 through the synergistic effect between the flocculation structure 2, the filtration structure 3 and the circulation component, effectively reducing the precipitation of impurities, greatly improving the filtration efficiency and filtration effect of the oil and gas field fracturing return fluid, and making the return fluid meet the discharge standard or reuse standard to protect the environment and save water resources.

Claims

1. An oil and gas field fracturing flowback fluid processing equipment, characterized by: It comprises a fixed base (1) and a flocculation structure (2) and a filtering structure (3) arranged on the fixed base (1); the input end of the filtering structure (3) is connected to the output end of the flocculation structure (2); and a circulation component is arranged between the input end and the output end of the filtering structure (3); The circulation component includes a two-in-one adapter tube (37), a discharge tube (35) is provided on one side of the top end of the two-in-one adapter tube (37), and a sixth transmission tube (29) is provided on the other side of the top end thereof, and the sixth transmission tube (29) is connected to the output end of the flocculation structure (2); a fifth transmission tube (36) is provided at the bottom end of the two-in-one adapter tube (37), and the fifth transmission tube (36) is connected to the output end of the filtration structure (3).

2. The oil and gas field fracturing flowback fluid processing equipment according to claim 1, characterized in that: A first valve (38) is provided between the discharge pipe (35) and the two-in-one transfer pipe (37), and a second valve (39) is provided between the sixth transmission pipe (29) and the two-in-one transfer pipe (37).

3. The oil and gas field fracturing flowback fluid processing equipment according to claim 1, characterized in that: The flocculation structure (2) includes a first transmission tube (23) and a plurality of flocculation tubes (24), wherein the plurality of flocculation tubes (24) are arranged at the bottom end of the first transmission tube (23), one end of the first transmission tube (23) is connected to the liquid inlet tube (21), and the other end is connected to the second transmission tube (26), and the middle section of the second transmission tube (26) is connected to the sixth transmission tube (29).

4. The oil and gas field fracturing flowback fluid processing equipment according to claim 3, characterized in that: A first control valve (22) is provided between the liquid inlet pipe (21) and the first transmission pipe (23), a second control valve (25) is provided between the first transmission pipe (23) and the second transmission pipe (26), and a third control valve (27) is provided between the second transmission pipe (26) and the sixth transmission pipe (29).

5. The oil and gas field fracturing flowback fluid processing equipment according to claim 1, characterized in that: The filtering structure (3) comprises a circulation pump (31) and a filter cartridge (34) connected to the circulation pump (31); a third transmission pipe (28) is provided at one end of the circulation pump (31), and a fourth transmission pipe (33) is provided at the other end thereof; the fourth transmission pipe (33) is connected to the bottom end of the filter cartridge (34), and the top end of the filter cartridge (34) is connected to the fifth transmission pipe (36); and the third transmission pipe (28) is connected to one end of the second transmission pipe (26).

6. The oil and gas field fracturing flowback fluid processing equipment according to claim 5, characterized in that: A fourth control valve (32) is provided between the circulation pump (31) and the fourth transmission pipe (33).

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