Fracturing flowback fluid separation device and method

Abstract

The present invention discloses a fracturing return fluid separation device and method, the device comprises: a separation chamber, comprising an upper shell and a lower shell, the lower shell is provided with a plurality of liquid outlets; a swing mechanism, connected to the upper shell, the swing mechanism can drive the separation chamber and the fracturing return fluid in the separation chamber to swing; a blocking mechanism, which can extend into the separation chamber and interrupt the swing of the rock in the fracturing return fluid, so that the waste liquid between the rocks is separated from the rock and filtered out from the liquid outlet; a discharge mechanism, the lower shell is connected to the upper shell through the discharge mechanism, and the discharge mechanism can drive the lower shell to separate from the upper shell and rotate the lower shell around a horizontal axis. The present invention utilizes the swing mechanism to drive the fracturing return fluid to swing, so that the rock and part of the waste liquid are separated during the swing process, and at the same time, the swing of the rock is interrupted by the blocking mechanism, so that the rock and another part of the waste liquid are further separated, thereby improving the efficient separation of the fracturing return fluid, and the separation efficiency is high and the separation effect is good.

Description

Technical Field

[0001] The present invention relates to the technical field of oilfield equipment, and in particular to a fracturing flowback fluid separation device and method. Background Art

[0002] During the exploitation of oil and gas wells, a certain amount of pressurized fracturing flowback fluid needs to be pumped into the wellhead. After the fracturing flowback fluid enters the production layer of the oil and gas well, the production layer is improved, thereby increasing the production of oil and gas. During the fracturing process, a large amount of fracturing flowback fluid will be discharged from the wellhead. The fracturing flowback fluid contains waste fracturing flowback fluid (hereinafter referred to as waste fluid) and rock (including rock slag and / or sand and gravel and other solids), among which the waste liquid is a pollutant. Since the waste liquid cannot be discharged directly, the operators usually have to separate the waste liquid from the rock in the fracturing flowback fluid, and then purify the separated waste liquid separately. After treatment, it can be discharged separately, and the separated rock is dumped.

[0003] In order to separate the waste liquid from the rock in the fracturing return fluid, the prior art uses the following method: Figure 1 The drum-type separation equipment shown is used to separate waste liquid and rock. The drum-type separation equipment includes a frame 1 and a conical cylinder 2. Both left and right ends of the conical cylinder 2 are closed ends. A plurality of liquid outlet holes 3 are distributed on the cylindrical surface of the conical cylinder 2. The two closed ends of the conical cylinder 2 are rotatably mounted on the frame 1 via a rotating shaft. An injection port 4 is provided at the smaller end of the conical cylinder 2. The top of the injection port 4 is connected to an end cover 5 via a flange. A discharge port 6 located below the injection port 4 is provided at the larger end of the conical cylinder 2. The discharge port 6 is connected to the end cover 5 via a flange. A power machine 7 is connected to a rotating shaft of the conical cylinder 2.

[0004] During operation, the operator first places a liquid collecting tank 8' under the conical cylinder 2, removes the end cover 5 at the top of the injection port 4, and then injects a certain amount of fracturing return fluid collected into the conical cylinder 2 through the injection port 4, and then reconnects the end cover 5 to the injection port 4. The operator turns on the power machine 7, which drives the conical cylinder 2 to rotate. Under the centrifugal force, the waste liquid in the conical cylinder 2 flows out from the liquid outlet 3, and the waste liquid flows into the liquid collecting tank 8', while the rock The rocks cannot pass through the outlet hole 3 and remain in the conical tube 2. After a period of time, the operator shuts down the power machine 7 and moves the liquid collecting tank 8'. After the shutdown, the operator places the discharge port 6 at the bottom and then opens the end cover 5 thereon. After opening, the rocks in the conical tube 2 roll out from the discharge port 6 along its conical surface and fall onto the frame 1, thereby realizing the separation of the waste liquid and the rocks in the fracturing return fluid; after separation, it is convenient to purify the waste liquid in the liquid collecting tank 8' later.

[0005] However, although this drum-type separation equipment can separate the waste liquid, after using it for a period of time, the technology has the following defects:

[0006] I. The conical barrel 2 can only perform a single rotational motion, so the rocks and waste liquid poured into it can only perform a single rotational motion, which results in a long wait time before the waste fracturing return fluid entrained between the rocks is separated out, thereby greatly reducing the separation efficiency.

[0007] II. When the rock needs to be discharged, the end cover 5 at the discharge port 6 needs to be opened, which undoubtedly increases the work intensity of the operators. In addition, the rock in the conical barrel 2 can only be discharged gradually from the discharge port 6. To discharge the rock in the conical barrel 2, it takes a long time to wait, which greatly reduces the discharge efficiency of the rock, thereby delaying the separation and treatment of the next batch of fracturing return fluid. Summary of the invention

[0008] The purpose of the present invention is to provide a fracturing return fluid separation device and method to solve the technical problems that when separating waste liquid from rock in fracturing return fluid, the rock and waste liquid can only perform a single rotational motion, resulting in a long separation time, low separation efficiency, and low rock discharge efficiency after separation.

[0009] The above-mentioned purpose of the present invention can be achieved by adopting the following technical solutions:

[0010] The present invention provides a fracturing return fluid separation device, comprising: a separation chamber, with a plurality of liquid outlets distributed thereon; a swing mechanism, connected to the separation chamber, the swing mechanism being able to drive the separation chamber and the fracturing return fluid in the separation chamber to swing; a blocking mechanism, which can extend into the separation chamber to interrupt the swinging of rocks in the fracturing return fluid, so that the waste liquid between the rocks is separated from the rocks and filtered out from the liquid outlets; a discharge mechanism, the separation chamber comprising an upper shell and a lower shell, the upper shell being connected to the swing mechanism, the lower shell being connected to the upper shell via the discharge mechanism, and the discharge mechanism being able to drive the lower shell to separate from the upper shell and rotate the lower shell around a horizontal axis.

[0011] In an embodiment of the present invention, the blocking mechanism includes a blocking member, and when the separation bin is in a swinging state, the blocking member extends into the separation bin and is fixedly arranged.

[0012] In an embodiment of the present invention, the separation chamber has a filter surface, a plurality of liquid outlet holes are distributed on the filter surface, and the blocking member cooperates with the filter surface.

[0013] In an embodiment of the present invention, the filtering surface is a concave curved surface, and the bottom surface of the blocking member is a convex curved surface matching the concave curved surface.

[0014] In an embodiment of the present invention, the blocking mechanism also includes a first telescopic member, which is mounted above the separation bin along the axial direction of the separation bin, and the blocking member is connected to the first telescopic member, and the first telescopic member can drive the blocking member to move along the axial direction of the separation bin.

[0015] In an embodiment of the present invention, the discharge mechanism includes two discharge structures, which are symmetrically arranged on both sides of the separation bin, and the discharge structure includes a second telescopic member and a rotating member, one end of the second telescopic member is connected to the upper shell, and the other end of the second telescopic member is connected to the lower shell through the rotating member, and the second telescopic member can drive the rotating member and the lower shell to be movably arranged along the axial direction of the separation bin, and when the lower shell is separated from the upper shell, the rotating member can drive the lower shell to rotate around the horizontal axis.

[0016] In an embodiment of the present invention, a sealing structure is provided at the lower end of the lower shell, and the upper end of the upper shell is pressed against the sealing structure.

[0017] In an embodiment of the present invention, the swing mechanism includes two swing structures, the two swing structures are symmetrically arranged relative to the swing direction of the separation bin, and the two sides of the separation bin are rotatably matched with the two swing structures via a rotating shaft.

[0018] In an embodiment of the present invention, the swing structure includes a third telescopic member, a gear, a rack and an adapter. The adapter is rotatably matched with the rotating shaft. The third telescopic member can drive the rack to move along the tangential direction of the swinging direction of the separation bin. The gear is installed on the rotating shaft and meshingly connected with the rack.

[0019] In an embodiment of the present invention, the fracturing return fluid separation device also includes a frame, the frame includes two brackets and a pad, the two brackets are installed on the pad, the separation chamber is erected between the two brackets through the swing mechanism, and the blocking mechanism is erected on the two brackets through a mounting frame and is located above the separation chamber.

[0020] In an embodiment of the present invention, the fracturing flowback fluid separation device comprises a liquid collecting tank body, and the liquid collecting tank body is placed below the separation chamber.

[0021] The present invention also provides a method for separating fracturing flowback fluid, comprising the following steps:

[0022] Step S1, placing a liquid collecting tank on the pad and directly below the lower shell;

[0023] Step S2, controlling the telescopic end of the first telescopic member to drive the blocking member to extend downward into the separation chamber, and the blocking member passes through the upper shell and extends into the lower shell and cooperates with the filter surface in the lower shell;

[0024] Step S3, injecting a certain amount of fracturing flowback fluid into the separation chamber from the opening at the upper end of the upper shell in multiple times, while a portion of the waste liquid passes through the liquid outlet hole and falls into the liquid receiving tank body, and another portion of the waste liquid is entrained between the rocks and remains in the lower shell because the rocks cannot pass through the liquid outlet hole;

[0025] Step S4, control the telescopic end of the third telescopic member of the two swing structures to perform reciprocating forward and backward telescopic movement, drive the rack to synchronously perform reciprocating forward and backward telescopic movement through the support plate, utilize the transmission between the rack and the gear, so that the gear drives the rotating shaft to rotate reciprocatingly within a certain angle range, so that the rotating shaft drives the separation chamber to swing back and forth through the connecting plate, and at the same time, the two discharge structures also swing back and forth synchronously, so that the rock with waste liquid entrained in the lower shell body also swings back and forth, thereby separating the waste liquid from the rock. During the dispersion process, since the blocking member is fixed in the separation chamber, the blocking member hinders the continuous swinging of the rock, and the waste liquid is further dispersed from the rock under the trend of swinging, so that the waste liquid entrained between the rocks is quickly precipitated and falls into the liquid receiving tank body through the liquid outlet hole. After the separation chamber swings back and forth for a period of time, the complete separation of the fracturing return fluid can be achieved, that is, the waste liquid is separated into the liquid receiving tank body, and the rock is separated into the lower shell body;

[0026] Step S5, discharging the rocks in the lower shell through the discharging mechanism, comprising:

[0027] Step S51, controlling the telescopic end of the first telescopic member to reset, thereby driving the blocking member to move out of the separation bin and reset;

[0028] Step S52, the liquid collecting tank is moved away from the pad, and the telescopic ends of the second telescopic members of the two discharging structures are controlled to extend downward at the same time, and the rotating member is driven to move downward through the lifting plate, and the rotating member drives the lower shell to move downward synchronously through the lower connecting plate, so that the lower shell is separated from the upper shell;

[0029] Step S53, when the telescopic end of the second telescopic member extends downward to a preset stroke, the two rotating members are controlled to start simultaneously, and the output end of the rotating member drives the lower shell to flip around the horizontal axis through the lower connecting plate. During the flipping process, the rocks in the lower shell will be dumped onto the pad. When the lower shell rotates 180°, all the rocks in the lower shell can be dumped out, thereby realizing the discharge of the rocks;

[0030] Step S6, after the rock is discharged, the output end of the rotating member is controlled to rotate to reset the lower housing. After the reset, the telescopic end of the second telescopic member is controlled to retract. When the telescopic end of the second telescopic member is reset, the upper end of the lower housing is pressed against the sealing structure of the lower end of the upper housing;

[0031] Step S7, repeating the operations from step S2 to step S6, to achieve batch separation of all fracturing flowback fluids.

[0032] The characteristics and advantages of the present invention are:

[0033] According to the fracturing return fluid separation device and method of the present invention, after the fracturing return fluid is injected into the separation chamber, a part of the waste liquid will be directly filtered out from the liquid outlet, but a part of the waste liquid will be entrained in the gaps between the rocks. Therefore, the separation chamber and the fracturing return fluid inside are driven to swing by a swinging mechanism. During the swinging process, part of the waste liquid between the rocks is separated from the rocks by the centrifugal force and flows out from the liquid outlet. When the swinging of the rocks is interrupted by the blocking mechanism, the waste liquid remaining between the rocks flows out from between the rocks under the trend of the swinging and then flows out from the liquid outlet. Therefore, the present invention uses a swinging mechanism to drive the fracturing return fluid to swing, so that the rock and part of the waste liquid are separated during the swinging process, and at the same time, the swinging of the rock is interrupted by the blocking mechanism, so that the rock and another part of the waste liquid are further separated, thereby improving the efficient separation of the fracturing return fluid, and the separation efficiency is high and the separation effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0035] Figure 1 It is a structural schematic diagram of a drum-type separation device in the prior art.

[0036] Figure 2 This is a diagram showing the use status of the fracturing flowback fluid separation device of the present invention.

[0037] Figure 3 It is a front view of the blocking member in the present invention.

[0038] Figure 4 It is a top view of the blocking member in the present invention.

[0039] Figure 5 It is a schematic structural diagram of the fracturing flowback fluid separation device in the present invention when the blocking mechanism is extended.

[0040] Figure 6It is a partial cross-sectional view of the fracturing flowback fluid separation device in the present invention when the blocking mechanism is extended.

[0041] Figure 7 It is a schematic diagram of the structure of the discharging mechanism in the present invention when preparing to discharge materials.

[0042] Figure 8 It is a structural schematic diagram of the discharging mechanism of the present invention when discharging materials.

[0043] Fig. 9 It is a side view of the swing mechanism in the present invention.

[0044] In the figure:

[0045] 1. Frame; 2. Conical cylinder; 3. Liquid outlet; 4. Injection port; 5. End cover; 6. Discharge port; 7. Power machine; 8', Liquid collecting tank;

[0046] 100, frame; 200, separation bin; 300, swing mechanism; 400, blocking mechanism; 500, discharge mechanism;

[0047] 8. Liquid collecting tank body; 9. Pad; 10. Left bracket; 11. Right bracket; 12. Platform; 13. Mounting frame; 14. Upper shell; 15. Sealing structure; 16. Swinging structure; 17. Third telescopic member; 18. Adapter; 19. Rack; 20. Rotating shaft; 21. Gear; 22. Upper connecting plate; 23. Lower shell; 24. Discharging structure; 25. First telescopic member; 26. Blocking member; 27. Second telescopic member; 28. Lower connecting plate; 29. ​​Rotating member; 30. Support plate; 31. Lifting plate; 32. Filter surface. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] Implementation Method 1

[0050] like Figure 2 As shown, the present invention provides a fracturing return fluid separation device, including: a separation chamber 200, which is distributed with a plurality of fluid outlets; a swing mechanism 300, which is connected to the separation chamber 200, and the swing mechanism 300 can drive the separation chamber 200 and the fracturing return fluid in the separation chamber 200 to swing; a blocking mechanism 400, which can extend into the separation chamber 200 to interrupt the swing of the rock in the fracturing return fluid, so that the liquid between the rocks is separated from the rocks and filtered out from the fluid outlets.

[0051] In the fracturing return fluid separation device of the present invention, after the fracturing return fluid is injected into the separation chamber 200, a part of the waste liquid will be directly filtered out from the liquid outlet, but a part of the waste liquid will be entrained in the gaps between the rocks. Therefore, the separation chamber 200 and the fracturing return fluid inside are driven to swing by the swinging mechanism 300. During the swinging process, part of the waste liquid between the rocks is separated from the rocks by the centrifugal force and flows out from the liquid outlet. When the swinging of the rocks is interrupted by the blocking mechanism 400, the waste liquid remaining between the rocks flows out from between the rocks under the trend of the swinging and then flows out from the liquid outlet. Therefore, the present invention utilizes the swinging mechanism 300 to drive the fracturing return fluid to swing, so that the rock and part of the waste liquid are separated during the swinging process. At the same time, the swinging of the rock is interrupted by the blocking mechanism 400, and the rock and another part of the waste liquid are further separated, thereby improving the efficient separation of the fracturing return fluid, and the separation efficiency is high and the separation effect is good.

[0052] Among them, the swing direction of the separation bin 200 may not be specifically limited. In the embodiment of the present invention, the swing mechanism 300 drives the separation bin 200 to rotate around a horizontal axis Z1, so that the separation bin 200 swings back and forth around a base point O (i.e., the intersection of the central axis Z of the separation bin 200 and the horizontal axis Z1), that is, Figure 2 Swing inward and outward from the page as shown.

[0053] The fracturing return fluid separation device includes a frame 100, and a separation chamber 200 is erected at a certain height on the frame 100 through a swing mechanism 300. The operator first places a liquid collecting tank 8 for collecting waste liquid under the separation chamber 200, and then injects the fracturing return fluid to be separated into the separation chamber 200. During the injection process, a part of the waste liquid will directly flow into the liquid collecting tank 8 through the liquid outlet hole, and the rock and the remaining waste liquid entrained by it cannot pass through the liquid outlet hole and remain in the separation chamber 200, and then the swing mechanism 300 is started to swing and the blocking mechanism 400 blocks the rock during the swinging process, so that the waste liquid entrained between the rocks is separated into the liquid collecting tank 8.

[0054] like Figure 2As shown, in the embodiment of the present invention, the blocking mechanism 400 includes a blocking member 26. When the separation chamber 200 is in a swinging state, the blocking member 26 extends into the separation chamber 200 and is fixedly arranged, that is, the separation chamber 200 swings while the blocking member 26 is fixed in the separation chamber 200. The separation chamber 200 drives the fracturing return fluid to swing, and the blocking member 26 always blocks the swinging direction of the fracturing return fluid. For example, in the embodiment of the present invention, when the separation chamber 200 swings forward, the fracturing return fluid in front and behind the blocking member 26 first swings forward half of the stroke driven by the separation chamber 200, so that the fracturing return fluid behind the blocking member 26 swings to the blocking member 26, and the rock behind is blocked and stops swinging immediately, and the waste liquid between the rocks behind flows out from the gaps between the rocks under the swinging trend and is filtered out from the liquid outlet, while the fracturing return fluid in front of the blocking member 26 Similarly, when the separation chamber 200 swings backward, the fracturing return fluid in front and behind the blocking member 26 swings backward half the stroke first under the drive of the separation chamber 200, so that the fracturing return fluid in front of the blocking member 26 swings to the blocking member 26, and the rock in front is blocked and stops swinging immediately, and the waste liquid between the rocks in front flows out from the gaps between the rocks and is filtered out from the liquid outlet under the trend of swinging, while the fracturing return fluid behind the blocking member 26 can continue to swing half the stroke; and so on and so forth, until all the waste liquid between the rocks is separated. Specifically, the extension direction B of the blocking member 26 is perpendicular to the swinging direction A and is located in the middle of the separation chamber 200, so that it can block the rock more effectively. Optionally, when the separation chamber is swinging, the blocking member can also extend into the separation chamber for blocking at regular intervals without hindering the swinging of the separation chamber.

[0055] like Figure 2 As shown, in order to prevent the blocking member 26 from interfering with the swing of the separation chamber 200, in an embodiment of the present invention, the separation chamber 200 is provided with a filter surface 32, and a plurality of liquid outlets are distributed on the filter surface 32. The blocking member 26 can extend into the separation chamber 200 and cooperate with the filter surface 32. The cooperation between the blocking member 26 and the filter surface 32 can be a sliding cooperation along the swing direction, that is, the filter surface 32 can slide along the swing direction relative to the blocking member 26; or it can be a clearance cooperation, and the gap between the blocking member 26 and the filter surface 32 is smaller than the particle size of the rock to prevent the rock from entering the gap. Specifically, in combination with Figure 3 as well as Figure 4 As shown, the filter surface 32 is a concave curved surface, and the bottom surface of the blocking member 26 is a convex curved surface that matches the concave curved surface, so that the filter surface 32 will not interfere with the blocking member 26, and there is no dead angle, which is conducive to the waste liquid flowing on the filter surface 32 and then flowing out from the liquid outlet. The blocking member 26 is preferably an arc-shaped strip scraper. Optionally, the filter surface is generally an arc-shaped plate-shaped structure with a side extending in an arc shape along the swing direction and a rectangular front face, and the blocking member 26 is generally in a long strip shape.

[0056] like Figure 2 , Figure 5 as well as Figure 6 As shown, the blocking mechanism 400 also includes a first telescopic member 25, which is mounted above the separation chamber 200 along the axial direction of the separation chamber 200, and the blocking member 26 is connected to the first telescopic member 25, and the first telescopic member 25 can drive the blocking member 26 to move along the axial direction of the separation chamber 200. Before separation, the blocking member 26 is driven by the first telescopic member 25 to extend into the separation chamber 200 and cooperate with the filter surface; then the fracturing return fluid is injected for separation treatment; after separation, the separation chamber 200 stops swinging, and the blocking member 26 is lifted out of the separation chamber 200 by the first telescopic member 25, which is conducive to discharging the rocks retained in the separation chamber 200. Specifically, a mounting frame 13 is provided on the frame 100, and the first telescopic member 25 is mounted above the separation chamber 200 through the mounting frame 13. The first telescopic member 25 can be an oil cylinder, a gas cylinder, an electric telescopic rod or other telescopic members.

[0057] like Figure 2 , Figure 7 as well as Figure 8 As shown, in the embodiment of the present invention, the fracturing flowback fluid separation device further includes a discharge mechanism 500, and the separation chamber 200 includes an upper shell 14 and a lower shell 23, and the lower shell 23 is connected to the upper shell 14 through the discharge mechanism 500, and the discharge mechanism 500 can drive the lower shell 23 to separate from the upper shell 14 and flip the lower shell 23. After the separation is completed, the separated rock remains in the lower shell 23, and the lower shell 23 is separated from the upper shell 14 by the discharge mechanism 500, so that the discharge mechanism 500 can drive the separated lower shell 23 to rotate around a horizontal axis alone, thereby dumping the rock in the lower shell 23. Among them, it is preferred to flip the lower shell 23 180 degrees so that its opening faces downward to ensure that all the rocks in the lower shell 23 are dumped out. The upper shell 14 is connected to the swing mechanism 300, so that the swing mechanism 300 will not interfere with the separation and flipping of the lower shell 23 by the discharge mechanism 500. In addition, by setting the separation chamber 200 as a split structure, the separation chamber 200 can have a larger processing capacity and can separate and process a large amount of fracturing return fluid at one time, while avoiding the separation chamber 200 being too large to achieve a large-angle flip to discharge the internal rocks. Specifically, the frame 100 also includes a pad 9, which is located below the separation chamber 200. After the separation is completed, the liquid collecting tank 8 is removed from the pad 9, and the pad 9 is used to receive the rocks poured out of the lower shell 23 above. The lower shell 23 is generally a spherical shell, and its inner wall surface constitutes a filtering surface 32, and the upper shell is generally a cylindrical shell.

[0058] like Figure 7 and Figure 8 As shown, in order to facilitate the discharge mechanism 500 to drive the lower shell 23 to separate from the upper shell 14, while ensuring the sealing between the upper shell 14 and the lower shell 23, in the embodiment of the present invention, the lower end of the upper shell 14 is provided with a sealing structure 15, and the upper end of the lower shell 23 is pressed against the sealing structure 15. Specifically, the tension provided by the discharge mechanism 500 is used to make the lower shell 23 and the sealing structure 15 press tightly. Optionally, the upper end of the lower shell 23 can also be provided with a sealing structure 15. Optionally, the upper end of the lower shell 23 and the end of the upper shell 14 can also be connected by plugging, snapping or other detachable methods.

[0059] like Figure 7 and Figure 8 As shown, the discharge mechanism 500 includes two discharge structures 24, which are symmetrically arranged on both sides of the separation bin 200. The discharge structure 24 includes a second telescopic member 27 and a rotating member 29. One end of the second telescopic member 27 is connected to the upper shell 14, and the other end of the second telescopic member 27 is connected to the lower shell 23 through the rotating member 29. The second telescopic member 27 can drive the rotating member 29 and the lower shell 23 to move along the axial direction of the separation bin 200. When the lower shell 23 is separated from the upper shell 14, the rotating member 29 can drive the lower shell 23 to rotate around the horizontal axis. After the separation is completed, the rotating member 29 and the lower shell 23 are driven by the two second telescopic members 27 to move downward along the axial direction of the separation bin 200 by a preset stroke, so that the lower shell 23 is separated from the upper shell 14, and there is a rotation space above the lower shell 23, and then the lower shell 23 is driven to rotate by the rotating member 29. Specifically, the preset stroke of the second telescopic member 27 extending downward is equal to its maximum movable stroke, that is, when the telescopic end of the second telescopic member 27 is fully extended, the rotating member 29 drives the lower shell 23 to rotate. Therefore, it is easy to control. The second telescopic member 27 can adopt an oil cylinder, an air cylinder, an electric telescopic rod or other telescopic members. The rotating member 29 can adopt a hydraulic motor, an electric motor or other structures that can achieve flipping. Two lower connecting plates 28 are symmetrically arranged on the outer peripheral surface of the lower shell 23 relative to its axis, and the telescopic end of the second telescopic member 27 is provided with a lifting plate 31, and the rotating member 29 is installed on the lifting plate 31. The output end of the rotating member 29 passes through the lifting plate 31 and is fixedly connected to the lower connecting plate 28 by welding or other fixing methods. Two upper connecting plates 22 are relatively arranged on the outer side of the upper shell 14, and the fixed end of the second telescopic member 27 is installed on the upper connecting plate 22.

[0060] like Figure 2As shown, in the embodiment of the present invention, the swing mechanism 300 includes two swing structures 16, and the two swing structures 16 are symmetrically arranged relative to the swing direction of the separation bin 200, and the two sides of the separation bin 200 are rotatably matched with the two swing structures 16 through the rotating shaft 20. Specifically, the rotating shafts 20 on both sides of the separation bin 200 are installed on the upper connecting plate 22, and the upper connecting plate 22 is generally L-shaped, including a vertical plate and a horizontal plate connected to each other, and the telescopic end of the second telescopic member 27 is fixed on the horizontal plate, and the rotating shaft 20 is installed on the vertical plate. The frame 100 includes two brackets, namely a left bracket 10 and a right bracket 11, and the two swing structures 16 are arranged on the left bracket 10 and the right bracket 11. The top of the left bracket 10 and the top of the right bracket 11 have a platform 12 for installing the swing structure 16 and the mounting frame 13, and the left bracket 10 and the right bracket 11 are placed on the pad 9.

[0061] like Figure 6 and Fig. 9 As shown, the swing structure 16 includes a third telescopic member 17, a gear 21, a rack 19 and an adapter 18, the adapter 18 is rotatably matched with the rotating shaft 20, the third telescopic member 17 can drive the rack 19 to move along the tangential direction of the swing direction of the separation chamber 200, and the gear 21 is installed on the rotating shaft 20 and meshed with the rack 19. The third telescopic member 17 drives the rack 19 to move back and forth along the tangential direction of the swing direction of the separation chamber 200, so that the rotating shaft 20 rotates back and forth around its axis under the transmission of the gear 21 and the rack 19, so that the separation chamber 200 swings around the rotating shaft 20. Specifically, the fixed end of the third telescopic member 17 is installed on the platform 12, and the telescopic end of the third telescopic member 17 is provided with a support plate 30, and the rack 19 is arranged on the support plate 30 in parallel with the third telescopic member 17. The adapter 18 includes a bearing seat, and the rotating shaft 20 is rotatably matched with the bearing seat through a bearing.

[0062] Implementation Method 2

[0063] Combination Figures 2 to 9 As shown, the present invention also provides a method for separating fracturing flowback fluid, comprising the following steps:

[0064] Step S1, placing a liquid collecting tank 8 on the pad 9 and directly below the lower shell 23;

[0065] Step S2, controlling the telescopic end of the first telescopic member 25 to drive the blocking member 26 to extend downward into the separation chamber 200, and the blocking member 26 passes through the upper shell 14 and extends into the lower shell 23 and cooperates with the filter surface 32 in the lower shell 23;

[0066] Step S3, a certain amount of fracturing flowback fluid is injected into the separation chamber 200 from the opening at the upper end of the upper shell 14 in multiple times. During the injection, a portion of the waste liquid passes through the liquid outlet hole and falls into the liquid receiving tank 8, while another portion of the waste liquid is entrained between the rocks and remains in the lower shell 23 because the rocks cannot pass through the liquid outlet hole;

[0067] Step S4, control the telescopic ends of the third telescopic members 17 of the two swing structures 16 to perform reciprocating forward and backward telescopic movements, drive the rack 19 to synchronously perform reciprocating forward and backward telescopic movements through the support plate 30, utilize the transmission between the rack 19 and the gear 21, so that the gear 21 drives the rotating shaft 20 to rotate reciprocatingly within a certain angle range, so that the rotating shaft 20 drives the separation bin 200 to swing forward and backward through the connecting plate, and at the same time, the two discharge structures 24 also swing forward and backward synchronously, thereby causing the rock entrained with waste liquid in the lower shell 23 to also swing forward and backward, Thus, the waste liquid is separated from the rock. During the dispersion process, since the blocking member 26 is fixed in the separation chamber 200, the blocking member 26 hinders the continuous swinging of the rock, and the waste liquid is further separated from the rock under the swinging trend, so that the waste liquid entrained between the rocks is quickly separated out and falls into the liquid receiving tank body 8 through the liquid outlet hole. After the separation chamber 200 swings back and forth for a period of time, the fracturing return fluid can be completely separated, that is, the waste liquid is separated into the liquid receiving tank body 8, and the rock is separated into the lower shell 23.

[0068] Step S5: discharge the rocks in the lower shell 23 through the discharge mechanism 500. The specific operation steps are as follows:

[0069] Step S51, controlling the telescopic end of the first telescopic member 25 to reset, thereby driving the blocking member 26 to move out of the separation chamber 200 and reset;

[0070] Step S52, the liquid collecting tank 8 is moved away from the pad 9, and the telescopic ends of the second telescopic members 27 of the two discharge structures 24 are controlled to extend downward at the same time, and the rotating member 29 is driven to move downward through the lifting plate 31, and the rotating member 29 drives the lower shell 23 to move downward synchronously through the lower connecting plate 28, so that the lower shell 23 is separated from the upper shell 14;

[0071] Step S53, when the telescopic end of the second telescopic member 27 extends downward to a preset stroke, the two rotating members 29 are controlled to start simultaneously, and the output end of the rotating member 29 drives the lower shell 23 to flip around the horizontal axis through the lower connecting plate 28. During the flipping process, the rocks in the lower shell 23 will be dumped onto the pad 9. When the lower shell 23 rotates 180°, all the rocks in the lower shell 23 can be dumped out, thereby achieving the discharge of the rocks;

[0072] Step S6, after the rock is discharged, the output end of the rotating member 29 is controlled to rotate to reset the lower housing 23. After the reset, the telescopic end of the second telescopic member 27 is controlled to retract. When the telescopic end of the second telescopic member 27 is reset, the upper end of the lower housing 23 is pressed against the sealing structure 15 at the lower end of the upper housing 14;

[0073] Step S7, repeating the operations from step S2 to step S6, to achieve batch separation of all fracturing flowback fluids.

[0074] The above are only several embodiments of the present invention. Those skilled in the art may make various changes or modifications to the embodiments of the present invention based on the contents disclosed in the application documents without departing from the spirit and scope of the present invention.

Claims

1. A fracturing flowback fluid separation device, characterized in that: include: The separation chamber (200) comprises an upper shell (14) and a lower shell (23), wherein the lower shell (23) is provided with a plurality of liquid outlet holes; A swing mechanism (300) is connected to the upper shell (14), and the swing mechanism (300) can drive the separation chamber (200) and the fracturing return fluid in the separation chamber (200) to swing; wherein the swing mechanism (300) includes two swing structures (16), and the two swing structures (16) are symmetrically arranged relative to the swing direction of the separation chamber (200), and the two sides of the separation chamber (200) are rotatably matched with the two swing structures (16) through a rotating shaft (20); A blocking mechanism (400) can extend into the separation chamber (200) to interrupt the swinging of the rocks in the fracturing return fluid, so that the waste liquid between the rocks is separated from the rocks and filtered out from the liquid outlet; wherein the blocking mechanism (400) includes a blocking member (26), and when the separation chamber (200) is in a swinging state, the blocking member (26) extends into the separation chamber (200) and is fixedly arranged; the blocking mechanism (400) also includes a first telescopic member (25), the first telescopic member (25) is mounted above the separation chamber (200) along the axial direction of the separation chamber (200), the blocking member (26) is connected to the first telescopic member (25), and the first telescopic member (25) can drive the blocking member (26) to move along the axial direction of the separation chamber (200); A discharge mechanism (500), wherein the lower shell (23) is connected to the upper shell (14) through the discharge mechanism (500), and the discharge mechanism (500) can drive the lower shell (23) to separate from the upper shell (14) and rotate the lower shell (23) around a horizontal axis; wherein the discharge mechanism (500) includes two discharge structures (24), the two discharge structures (24) are symmetrically arranged on both sides of the separation bin (200), and the discharge structure (24) includes a second telescopic member (27) and a rotating member (29), one end of the second telescopic member (27) is connected to the upper shell (14), and the other end of the second telescopic member (27) is connected to the lower shell (23) through the rotating member (29), and the second telescopic member (27) can drive the rotating member (29) and the lower shell (23) to be movably arranged along the axial direction of the separation bin (200), and when the lower shell (23) is separated from the upper shell (14), the rotating member (29) can drive the lower shell (23) to rotate around the horizontal axis.

2. The fracturing flowback fluid separation device according to claim 1, characterized in that: The separation chamber (200) has a filter surface (32) in it, a plurality of liquid outlet holes are distributed on the filter surface (32), and the blocking member (26) cooperates with the filter surface (32).

3. The fracturing flowback fluid separation device according to claim 2, characterized in that: The filtering surface (32) is a concave curved surface, and the bottom surface of the blocking member (26) is a convex curved surface matching the concave curved surface.

4. The fracturing flowback fluid separation device according to claim 1, characterized in that: A sealing structure (15) is provided at the lower end of the lower shell (23), and the upper end of the upper shell (14) is pressed against the sealing structure (15).

5. The fracturing flowback fluid separation device according to claim 1, characterized in that: The swing structure (16) comprises a third telescopic member (17), a gear (21), a rack (19) and an adapter (18); the adapter (18) is rotatably matched with the rotating shaft (20); the third telescopic member (17) can drive the rack (19) to move in a tangential direction of the swing direction of the separation bin (200); the gear (21) is mounted on the rotating shaft (20) and meshedly connected with the rack (19).

6. The fracturing flowback fluid separation device according to claim 1, characterized in that: The fracturing return fluid separation device also includes a frame (100), the frame (100) includes two brackets and a pad (9), the two brackets are installed on the pad (9), the separation chamber (200) is erected between the two brackets through the swing mechanism (300), and the blocking mechanism (400) is erected on the two brackets through the mounting frame (13) and is located above the separation chamber (200).

7. The fracturing flowback fluid separation device according to claim 1, characterized in that: The fracturing flowback fluid separation device comprises a liquid collecting tank body (8), and the liquid collecting tank body (8) is placed below the separation chamber (200).

8. A method for separating fracturing flowback fluid, characterized in that: The following steps are involved: Step S1, placing a liquid collecting tank (8) on the pad (9) and directly below the lower shell (23); Step S2, controlling the telescopic end of the first telescopic member (25) to drive the blocking member (26) to extend downward into the separation chamber (200), and the blocking member (26) passes through the upper shell (14) and extends into the lower shell (23) and cooperates with the filtering surface (32) in the lower shell (23); Step S3, injecting a certain amount of fracturing flowback fluid into the separation chamber (200) from the opening at the upper end of the upper shell (14) in multiple times, while a portion of the waste liquid passes through the liquid outlet hole and falls into the liquid receiving tank (8), and another portion of the waste liquid is entrained between the rocks and remains in the lower shell (23) because the rocks cannot pass through the liquid outlet hole; Step S4, controlling the telescopic ends of the third telescopic members (17) of the two swing structures (16) to perform reciprocating forward and backward telescopic movements, driving the rack (19) to synchronously perform reciprocating forward and backward telescopic movements through the support plate (30), utilizing the transmission between the rack (19) and the gear (21), so that the gear (21) drives the rotating shaft (20) to reciprocate within a certain angle range, so that the rotating shaft (20) drives the separation chamber (200) to swing forward and backward through the connecting plate, and at the same time, the two discharge structures (24) also swing forward and backward synchronously, thereby causing the rocks entrained with waste liquid in the lower shell (23) to also The separation chamber (200) swings back and forth, thereby separating the waste liquid from the rock. During the dispersion process, since the blocking member (26) is fixed in the separation chamber (200), the blocking member (26) blocks the continuous swinging of the rock, and the waste liquid is further separated from the rock under the swinging trend, so that the waste liquid entrained between the rocks is quickly separated out and falls into the liquid receiving tank body (8) through the liquid outlet hole. After the separation chamber (200) swings back and forth for a period of time, the complete separation of the fracturing return fluid can be achieved, that is, the waste liquid is separated into the liquid receiving tank body (8), and the rock is separated into the lower shell body (23); Step S5, discharging the rocks in the lower shell (23) through the discharging mechanism (500), comprising: Step S51, controlling the telescopic end of the first telescopic member (25) to reset, thereby driving the blocking member (26) to move out of the separation bin (200) and reset; Step S52, the liquid collecting tank body (8) is moved away from the pad (9), and the telescopic ends of the second telescopic members (27) of the two discharge structures (24) are controlled to extend downward at the same time, and the rotating member (29) is driven to move downward through the lifting plate (31), and the rotating member (29) drives the lower shell (23) to move downward synchronously through the lower connecting plate (28), so that the lower shell (23) is separated from the upper shell (14); Step S53, when the telescopic end of the second telescopic member (27) extends downward by a preset stroke, the two rotating members (29) are controlled to start simultaneously, and the output end of the rotating member (29) drives the lower shell (23) to flip around the horizontal axis through the lower connecting plate (28). During the flipping process, the rocks in the lower shell (23) will be dumped onto the pad (9). When the lower shell (23) rotates 180°, all the rocks in the lower shell (23) can be dumped out, thereby achieving the discharge of the rocks; Step S6, after the rock is discharged, the output end of the rotating member (29) is controlled to rotate to reset the lower housing (23), and after the reset, the telescopic end of the second telescopic member (27) is controlled to retract, and when the telescopic end of the second telescopic member (27) is reset, the upper end of the lower housing (23) is pressed against the sealing structure (15) at the lower end of the upper housing (14); Step S7, repeating the operations from step S2 to step S6, to achieve batch separation of all fracturing flowback fluids.

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