Fracturing flow-back fluid solid-liquid separation device

Abstract

The solid-liquid separation device comprises a separation barrel and a separation rotary drum, the bottom end of the separation rotary drum is fixedly connected with a leading-out barrel, the bottom end of the leading-out barrel is fixedly connected with a connecting cover, and a positioning barrel is rotationally installed at the bottom of an inner cavity of the connecting cover; a solid bearing cylinder is fixedly connected to the bottom end of the positioning cylinder, a guiding-out bearing cylinder is fixedly connected to the bottom end of the solid bearing cylinder, and a connecting plug is slidably mounted in the guiding-out bearing cylinder; a plurality of supporting legs are fixedly installed at the bottom end of the separation barrel at equal intervals, and a bearing base is fixedly installed at the bottom ends of the multiple supporting legs. According to the solid-liquid separation device disclosed by the utility model, through the matching of the separation rotary drum, the solid bearing drum, the connecting plug and other structures, separated solids can be discharged according to actual conditions in the solid-liquid separation process of the flow-back liquid, so that the solid-liquid separation work of the flow-back liquid can be continuously carried out by the whole device, and the use effect of the whole device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of solid-liquid separation of fracturing flowback fluid, in particular to a solid-liquid separation device for fracturing flowback fluid. Background Art

[0002] In the existing technology, as the water content of crude oil in oil fields increases year by year, the amount of associated oil field produced water also continues to increase. For the sake of environmental protection and resource conservation, treating oil field wastewater and reinjecting it to meet standards is the main direction of energy conservation, emission reduction and clean production in the petrochemical industry. Therefore, it is necessary to perform solid-liquid separation on the oil field fracturing return fluid.

[0003] After searching, the Chinese patent application number 202420052489.6 discloses a solid-liquid separation device for fracturing return fluid, including a base, a separation tank is installed on the upper surface of the base, two hydraulic push rods are fixedly installed on the top wall of the separation tank, the output ends of the hydraulic push rods are fixedly installed with connecting blocks, a filter box is fixedly installed between the two connecting blocks, a connecting hose is fixedly installed on the top of the filter box, an oil pump is fixedly installed on the outer wall of the separation tank, the water suction port of the oil pump is connected to the connecting hose, two filter screens are fixedly installed on the bottom surface of the filter box, a rotating ring is provided in the middle of the filter screen, a rotating groove is provided at the center of the rotating ring, and a plurality of connecting plates are fixedly installed around the rotating ring.

[0004] The above patent has the following shortcomings: the device filters the fracturing return fluid by setting a filter box with an opening downward, which can effectively prevent solids from accumulating on the filter screen on the filter box and prevent the filter screen from being blocked by solids. When the fracturing return fluid in the separation tank becomes less and the liquid level becomes low, the filter box is driven downward by starting the hydraulic push rod, which facilitates the filtration and suction of the liquid in the fracturing return fluid below; however, in actual use, it is not convenient to continuously filter the return fluid. After a certain period of time, the separation tank can only stop working, clean the separation tank, and then perform solid-liquid separation of the return fluid, which reduces the use effect of the overall device. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a fracturing flowback fluid solid-liquid separation device.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A fracturing flowback liquid solid-liquid separation device comprises: a separation barrel and a separation rotary drum, the bottom end of the separation rotary drum is fixedly connected to a guide cylinder, the bottom end of the guide cylinder is fixedly connected to a connecting cover, the bottom of the inner cavity of the connecting cover is rotatably installed with a positioning cylinder, the bottom end of the positioning cylinder is fixedly connected to a solid supporting cylinder, the bottom end of the solid supporting cylinder is fixedly connected to a guide supporting cylinder, and a connecting plug is slidably installed inside the guide supporting cylinder; a plurality of supporting legs are equidistantly fixedly installed on the bottom end of the separation barrel, a bearing base is fixedly installed on the bottom end of the plurality of supporting legs, a telescopic hydraulic cylinder is fixedly installed on the top end of the bearing base, a connecting sleeve is fixedly sleeved on the outer wall of the telescopic end of the telescopic hydraulic cylinder, and the connecting sleeve is fixedly connected to the bottom end of the connecting plug.

[0008] As a further solution of the present invention: a liquid outlet pipe is fixedly connected to the middle of the outer wall of the separation barrel, and a separation partition is fixedly connected to the middle of the inner wall of the separation barrel, and a drainage hole is opened on one side of the upper surface of the separation partition, and the drainage hole is connected to the liquid outlet pipe.

[0009] As a further solution of the present invention: the top end of the separation drum is fixedly connected to an introduction drum, and the top end of the outer wall of the introduction drum is fixedly installed with a driven sprocket.

[0010] As a further solution of the present invention: a driving motor is provided on the top of the outer wall of the separation barrel, and a driving sprocket is fixedly installed on the output shaft of the driving motor.

[0011] As a further solution of the present invention: a support arm is fixedly installed on the top of the separation barrel, and a return liquid conduit is fixedly installed on the top of the support arm.

[0012] As a further solution of the present invention: a carrying ring frame is fixedly sleeved on the outer wall of the lead-out carrying cylinder, and a fixed ring frame is provided at the bottom end of the carrying ring frame.

[0013] As a further solution of the present invention: a connecting flange is fixedly installed on the bottom end of the fixed ring frame, and a solid discharge pipe is fixedly connected to the bottom end of the connecting flange.

[0014] As a further solution of the present invention: a matching installation cylinder is fixedly sleeved on the outer wall of the fixed ring frame, and the matching installation cylinder is fixedly connected to the bottom of the inner cavity of the separation barrel.

[0015] Compared with the prior art, the present invention provides a fracturing flowback fluid solid-liquid separation device with the following beneficial effects:

[0016] 1. The fracturing flowback fluid solid-liquid separation device, through the cooperation of structures such as the separation drum, solid-bearing drum and connecting plug, can discharge the separated solids according to actual conditions during the process of solid-liquid separation of the flowback fluid, thereby realizing the continuous solid-liquid separation work of the entire device on the flowback fluid and improving the use effect of the entire device.

[0017] 2. The fracturing flowback fluid solid-liquid separation device forms a vortex in the separation fluid when the connecting cover and the sealing ring plate rotate with the separation drum, and uses centrifugal force to reduce the possibility of the separation fluid entering between the sealing ring plate and the separation partition.

[0018] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. The utility model has a simple structure and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the overall assembly of the utility model;

[0020] Figure 2 It is a partial cross-sectional structural diagram of the overall assembly of the utility model;

[0021] Figure 3 For this utility model Figure 2 Schematic diagram of the enlarged structure at A in the middle;

[0022] Figure 4 For this utility model Figure 2 Schematic diagram of the enlarged structure at point B in the middle.

[0023] In the figure: 1. Separation barrel; 2. Support arm; 3. Return liquid conduit; 4. Motor bracket; 5. Drive motor; 6. Drive sprocket; 7. Liquid outlet pipe; 8. Support leg; 9. Bearing base; 10. Telescopic hydraulic cylinder; 11. Connecting sleeve; 12. Separation drum; 13. Inlet drum; 14. Bearing 1; 15. Driven sprocket; 16. Outlet drum; 17. Connecting cover; 18. Sealing ring plate; 19. Bearing 2; 20. Positioning drum; 21. Bearing 3; 22. Connecting shaft seal; 23. Sealing connection gasket; 24. Separation partition; 25. Drain hole; 26. Solid bearing drum; 27. Outlet bearing drum; 28. Bearing ring frame; 29. ​​Fixed ring frame; 30. Connecting flange; 31. Solid discharge pipe; 32. Matching mounting drum; 33. Limit pin hole; 34. Fixed limit pin; 35. Connecting plug. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0025] A fracturing flowback fluid solid-liquid separation device, such as Figures 1 to 4 As shown, it includes: a separation barrel 1 and a separation drum 12, the separation drum 12 is arranged inside the separation barrel 1, a plurality of support legs 8 are fixedly installed at the bottom end of the separation barrel 1 at equal intervals, and a bearing base 9 is fixedly installed at the bottom end of the plurality of support legs 8.

[0026] A telescopic hydraulic cylinder 10 is fixedly mounted on the top of the supporting base 9 . A connecting sleeve 11 is fixedly sleeved on the outer wall of the telescopic end of the telescopic hydraulic cylinder 10 . A connecting plug 35 is fixedly connected to the top of the connecting sleeve 11 .

[0027] A liquid outlet pipe 7 is fixedly connected to the middle of the outer wall of the separation barrel 1, and the liquid outlet pipe 7 is arranged to be inclined downward; and a motor bracket 4 is fixedly installed on the top of the outer wall of the separation barrel 1, and a drive motor 5 is fixedly installed inside the motor bracket 4, and a drive sprocket 6 is fixedly installed on the top of the output shaft of the drive motor 5.

[0028] An introduction cylinder 13 is integrally formed at the top of the separation drum 12, and a bearing 14 is fixedly installed at the bottom of the outer wall of the introduction cylinder 13. The outer ring of the bearing 14 is fixedly connected to the top barrel of the separation barrel 1, and the introduction cylinder 13 passes through the top barrel of the separation barrel 1 and extends upward.

[0029] A driven sprocket 15 is fixedly installed in the middle of the outer wall of the introduction cylinder 13, and the driven sprocket 15 is connected to the driving sprocket 6 through a chain; a plurality of liquid outlet holes are equidistantly opened in the middle of the outer wall of the separation drum 12 to facilitate the separation of return liquid and solid.

[0030] A support arm 2 is fixedly installed on the top of the separation barrel 1, and a return liquid conduit 3 is fixedly installed on the top of the support arm 2. The return liquid conduit 3 is set as a ninety-degree bent tube, and its bent part passes through the introduction cylinder 13 into the interior of the separation drum 12; and the return liquid conduit 3 is connected to the return liquid storage device through a supply pump, so as to facilitate the continuous introduction of the return liquid into the interior of the separation drum 12.

[0031] The bottom end of the separation drum 12 is integrally formed with a guide tube 16, and the bottom end of the guide tube 16 is integrally formed with a connecting cover 17. The middle part of the outer wall of the connecting cover 17 is integrally formed with a sealing ring plate 18, and the lower part of the outer wall of the connecting cover 17 is fixedly installed with a bearing three 21, and the outer wall of the outer ring of the bearing three 21 is fixedly sleeved with a separation partition 24.

[0032] The separation partition 24 is welded to the middle of the inner wall of the separation barrel 1, and a drainage hole 25 is opened on the side of the upper surface of the separation partition 24. The drainage hole 25 is connected to the liquid outlet pipe 7 to facilitate direct discharge of the liquid separated from the return liquid.

[0033] A connecting shaft seal 22 is fixedly installed at the bottom end of bearing three 21, a sealing connecting gasket 23 is provided at the bottom end of the connecting shaft seal 22, and a sealing ring plate 18 is provided on the upper surface of the separation partition 24 to reduce the possibility of the liquid separated from the return fluid seeping into the inner wall of bearing three 21.

[0034] A second bearing 19 is fixedly mounted on the bottom of the inner cavity of the connecting cover 17 , and a positioning cylinder 20 is fixedly mounted on the inner wall of the inner ring of the second bearing 19 . The top end of the positioning cylinder 20 is in contact with the top inner wall of the connecting cover 17 .

[0035] A solid supporting tube 26 is integrally formed at the bottom end of the positioning tube 20 . A guide tube 27 is fixedly connected to the bottom end of the solid supporting tube 26 . A connecting plug 35 is slidably installed inside the guide tube 27 .

[0036] The outer wall of the discharge bearing cylinder 27 is fixedly sleeved with a bearing ring frame 28 , the bottom end of the bearing ring frame 28 is provided with a fixed ring frame 29 , the bottom end of the fixed ring frame 29 is fixedly installed with a connecting flange 30 , and the bottom end of the connecting flange 30 is fixedly connected to a solid discharge pipe 31 .

[0037] The solid discharge pipe 31 is configured as a bent pipe for discharging solids from the flowback liquid separation body; the connecting sleeve 11 penetrates the solid discharge pipe 31 and is slidably connected to the solid discharge pipe 31 .

[0038] The outer wall of the fixed ring frame 29 is fixedly sleeved with a matching mounting tube 32, and the matching mounting tube 32 is fixedly connected to the bottom of the inner cavity of the separation barrel 1; the inner wall of the bottom end of the fixed ring frame 29 is equidistantly provided with a plurality of limit pin holes 33, the limit pin holes 33 pass through the matching mounting tube 32, and the interior of the limit pin hole 33 is fixedly inserted with a fixed limit pin 34.

[0039] like Figure 2 As shown, the top and bottom of the separation drum 12 are respectively provided with an introduction drum 13 and an outlet drum 16 with a smaller inner diameter, so as to facilitate the retention of the return liquid inside the separation drum 12. The separation drum 12 rotates under the drive of the drive motor 5, and the centrifugal force generated drives the return liquid to separate the solid and liquid, thereby improving the speed and effect of the solid-liquid separation of the return liquid; before introducing the return liquid, the drive motor 5 needs to be started in advance to drive the separation drum 12 to a stable rotation state.

[0040] The connecting cover 17 includes an upper inverted bucket-shaped cylinder and a lower cylinder. The outer diameter of the sealing ring plate 18 is set to twice the outer diameter of the cylinder. When the connecting cover 17 and the sealing ring plate 18 rotate with the separation drum 12, the separation liquid (liquid separated from the return liquid) forms a vortex, and the centrifugal force is used to reduce the possibility of the separation liquid entering between the sealing ring plate 18 and the separation partition 24.

[0041] The inner diameter of the positioning cylinder 20 is larger than the outer diameter of the outlet cylinder 16, which facilitates the separated solids (solids separated from the return liquid) to enter the solid carrying cylinder 26. The inner diameter of the solid carrying cylinder 26 is set to twice the inner diameter of the positioning cylinder 20, which can temporarily store a certain amount of separated solids; the inner diameter of the outlet carrying cylinder 27 is slightly smaller than the inner diameter of the positioning cylinder 20, which is convenient for cooperation with the connecting plug 35 to control the discharge amount and discharge speed of the separated solids.

[0042] The maximum lifting height of the connecting plug 35 is fifty centimeters. At this time, the maximum distance between the bottom end of the connecting plug 35 and the inner wall of the bottom end of the solid supporting tube 26 is twenty centimeters, which is convenient for separating the solids into the solid discharge pipe 31. At this time, the bottom end of the connecting sleeve 11 is still outside the solid discharge pipe 31 and will not enter the inside of the solid discharge pipe 31; the bottom end of the guide supporting tube 27 is inserted into the solid discharge pipe 31 to avoid the situation where the separated solids contaminate the fixed ring frame 29.

[0043] Working principle:

[0044] Please refer to Figures 1 to 4 , assemble the device as shown in the figure;

[0045] When the device is in use, the drive motor 5 is first started, and the drive motor 5 drives the separation drum 12 to rotate through the drive sprocket 6 and the driven sprocket 15 (the solid carrier drum 26 remains stationary). At this time, the connecting plug 35 is inside the outlet carrier drum 27; then, the return liquid is introduced into the separation drum 12 through the return liquid conduit 3; the return liquid first fills the solid carrier drum 26, and then the liquid level rises and enters the separation drum 12. Under the action of centrifugal force, the return liquid undergoes solid-liquid separation, and the separated liquid enters the top of the separation partition 24, and is then discharged through the drainage hole 25 and the liquid outlet pipe 7. The separated solids enter the solid supporting cylinder 26, and the separation liquid inside the solid supporting cylinder 26 is squeezed into the separation drum 12; when the interior of the solid supporting cylinder 26 is filled with separated solids, the telescopic hydraulic cylinder 10 is started, and the telescopic hydraulic cylinder 10 drives the connecting plug 35 to move upward until the connecting plug 35 can no longer be raised. During this period, the separated solids inside the solid supporting cylinder 26 enter the solid discharge pipe 31 through the outlet supporting cylinder 27 for discharge; the connecting plug 35 rises to the highest position for three to five seconds, and then the telescopic hydraulic cylinder 10 drives the connecting plug 35 to fall, returning to the initial state (such as Figure 2 As shown), waiting for the next discharge of separated solids.

[0046] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A fracturing flowback fluid solid-liquid separation device, characterized in that: include: A separation barrel (1) and a separation drum (12); the bottom end of the separation drum (12) is fixedly connected to a guide tube (16); the bottom end of the guide tube (16) is fixedly connected to a connection cover (17); a positioning tube (20) is rotatably installed at the bottom of the inner cavity of the connection cover (17); the bottom end of the positioning tube (20) is fixedly connected to a solid bearing tube (26); the bottom end of the solid bearing tube (26) is fixedly connected to a guide tube bearing tube (27); a connection plug (35) is slidably installed inside the guide tube bearing tube (27); a plurality of support legs (8) are fixedly installed at the bottom end of the separation barrel (1), a bearing base (9) is fixedly installed at the bottom end of the plurality of support legs (8), a telescopic hydraulic cylinder (10) is fixedly installed at the top end of the bearing base (9), a connecting sleeve (11) is fixedly sleeved on the outer wall of the telescopic end of the telescopic hydraulic cylinder (10), and the connecting sleeve (11) is fixedly connected to the bottom end of the connection plug (35).

2. The fracturing flowback fluid solid-liquid separation device according to claim 1, characterized in that: A liquid outlet pipe (7) is fixedly connected to the middle of the outer wall of the separation barrel (1), and a separation partition (24) is fixedly connected to the middle of the inner wall of the separation barrel (1). A liquid drainage hole (25) is provided on one side of the upper surface of the separation partition (24), and the liquid drainage hole (25) is communicated with the liquid outlet pipe (7).

3. The fracturing flowback fluid solid-liquid separation device according to claim 1, characterized in that: The top end of the separation drum (12) is fixedly connected to an introduction drum (13), and a driven sprocket (15) is fixedly installed on the top of the outer wall of the introduction drum (13).

4. The fracturing flowback fluid solid-liquid separation device according to claim 1, characterized in that: A driving motor (5) is provided on the top of the outer wall of the separation barrel (1), and a driving sprocket (6) is fixedly mounted on the output shaft of the driving motor (5).

5. The fracturing flowback fluid solid-liquid separation device according to claim 1, characterized in that: A support arm (2) is fixedly mounted on the top of the separation barrel (1), and a return liquid conduit (3) is fixedly mounted on the top of the support arm (2).

6. The fracturing flowback fluid solid-liquid separation device according to claim 1, characterized in that: The outer wall of the guide bearing cylinder (27) is fixedly sleeved with a bearing ring frame (28), and the bottom end of the bearing ring frame (28) is provided with a fixed ring frame (29).

7. The fracturing flowback fluid solid-liquid separation device according to claim 6, characterized in that: A connecting flange (30) is fixedly mounted on the bottom end of the fixed ring frame (29), and a solid discharge pipe (31) is fixedly connected to the bottom end of the connecting flange (30).

8. The fracturing flowback fluid solid-liquid separation device according to claim 6, characterized in that: The outer wall of the fixed ring frame (29) is fixedly sleeved with a matching installation cylinder (32), and the matching installation cylinder (32) is fixedly connected to the bottom of the inner cavity of the separation barrel (1).

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