Viscosity-reducing and coalescing separation integrated device

Abstract

The present application relates to the technical field of oil-water separation in petroleum chemical industry, and particularly relates to a viscosity-reducing and coalescence-separating integrated device. The device comprises a dynamic and static shear viscosity-reducing unit and a spiral coalescence-separating unit. The dynamic and static shear viscosity-reducing unit comprises a viscosity-reducing window cylinder, the viscosity-reducing window cylinder is connected with a plurality of viscosity-reducing rotating discs, and the plurality of viscosity-reducing rotating discs are connected with a lock-type central overflow pipe. The spiral coalescence-separating unit comprises a coalescence conical cylinder, the coalescence conical cylinder is connected with the viscosity-reducing window cylinder, the inner side of the coalescence conical cylinder is connected with a tangential inlet disc, the tangential inlet disc is connected with a material coalescence inverted cone, the tail end of the tangential inlet disc is connected with an equal-pitch central overflow pipe, the equal-pitch central overflow pipe is connected with an equal-pitch spiral flow channel, the tail end of the equal-pitch central overflow pipe is connected with a variable-pitch central overflow pipe, and the variable-pitch central overflow pipe is connected with a variable-pitch spiral flow channel. The viscosity-reducing and coalescence-separating integrated device solves the problems of high viscosity of oil well produced liquid and serious emulsification.

Description

Technical Field

[0001] This invention relates to the technical field of oil-water separation in petrochemicals, and particularly to an integrated device for viscosity reduction and coalescence separation. Background Technology

[0002] As the water content of produced fluids in oilfields gradually increases, polymer flooding technology is becoming increasingly widely used. Polymer flooding is simple to operate, has low cost, and the relevant raw materials are relatively easy to obtain. However, in actual production, the addition of polymers increases the viscosity of the aqueous phase of the produced fluid, leading to higher viscosity of the polymer-containing produced fluid. This is detrimental to subsequent oil-water phase separation. Furthermore, due to severe oil-water emulsification, the resulting emulsion is highly stable, increasing the difficulty of subsequent oil-water separation and wastewater treatment.

[0003] In addition, the main viscosity reduction method used in onshore and offshore oilfields in recent years is mechanical viscosity reduction. Mechanical viscosity reduction technology involves subjecting high-viscosity macromolecules, also known as polymer macromolecules, to mechanical shearing or mechanical shearing when flowing in porous formation media. This breaks down the molecular chain segments, resulting in a decrease in viscosity. Mechanical viscosity reduction technology is low in cost, highly adaptable to the environment, has a long service life, and provides significant and stable viscosity reduction effects. However, in actual production, the mechanical shearing rate is too high, leading to severe emulsification. Because most oil droplets are sheared into smaller droplets, the efficiency of oil-water separation is low, and the subsequent oil-water separation becomes more difficult. Therefore, to address these shortcomings, an integrated viscosity reduction and coalescence separation device is proposed. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] This invention provides an integrated device for viscosity reduction and coalescence separation, which overcomes the defects of existing technologies such as high viscosity of oil well produced fluid making it difficult to separate and severe emulsification making it difficult to separate.

[0006] (II) Technical Solution

[0007] To address the above problems, the present invention provides an integrated device for viscosity reduction, coalescence separation, comprising:

[0008] The system includes a dynamic and static shear viscosity reduction unit and a spiral coalescing separation unit. The dynamic and static shear viscosity reduction unit comprises a viscosity reduction window cylinder, a viscosity reduction rotating disk, a dynamic shear rotor, a lock-type central overflow pipe, a rotor fixing cap, and a viscosity reduction rotating column. The viscosity reduction window cylinder has multiple rotating disk window holes, through which the viscosity reduction rotating disk is inserted. The side wall of the viscosity reduction window cylinder has multiple viscosity reduction through holes, and a viscosity reduction rotating column is inserted into each of the viscosity reduction through holes. The viscosity reduction rotating column is connected to the viscosity reduction rotating disk. Two dynamic shear rotors are installed inside each viscosity reduction rotating disk. The top of the dynamic shear rotor is fixed by a rotor fixing cap. Multiple viscosity reduction rotating disks are connected to a lock-type central overflow pipe.

[0009] The spiral coalescing separation unit includes a coalescing conical cylinder, a tangential inlet disk, a material coalescing inverted cone, a constant pitch spiral flow channel, a constant pitch central overflow pipe, a variable pitch central overflow pipe, and a variable pitch spiral flow channel. The inner side of the coalescing conical cylinder is connected to the tangential inlet disk, the tangential inlet disk is connected to the material coalescing inverted cone, the tail end of the tangential inlet disk is connected to the constant pitch central overflow pipe, the constant pitch central overflow pipe is connected to the constant pitch spiral flow channel, the tail end of the constant pitch central overflow pipe is connected to the variable pitch central overflow pipe, and the variable pitch central overflow pipe is connected to the variable pitch spiral flow channel.

[0010] The dynamic and static shear viscosity reduction unit and the spiral coalescing separation unit are connected, the viscosity reduction window cylinder is detachably connected to the coalescing cone cylinder, and the lock-type central overflow pipe is connected to the tangential inlet plate.

[0011] Preferably, the viscosity-reducing rotary disk includes a rotary eye-shaped frame, a rotor support frame, a static shearing mesh, a rotor rotating column, and a locking center hole. A viscosity-reducing rotating hole is provided on one side of the rotary eye-shaped frame. Two rotor support frames are welded to the bottom of the rotary eye-shaped frame. Multiple static shearing meshes are welded to the bottom of the rotary eye-shaped frame. Each static shearing mesh is welded to the rotor support frame. The rotor support frame is welded to the rotor rotating column. The two rotor support frames are perpendicular to each other. A locking center hole is provided at the intersection of the two rotor support frames.

[0012] Preferably, the viscosity-reducing rotating disk is concentrically connected to the viscosity-reducing rotating column through a viscosity-reducing rotating hole, the viscosity-reducing rotating disk is connected to a locking center overflow pipe through a locking center hole, and the viscosity-reducing rotating disk is connected to a dynamic shearing rotor through a rotor rotating column.

[0013] Preferably, the dynamic shearing rotor includes a rotor center ring, a power spiral blade, and a conical shearing blade. The rotor center ring is connected to the rotor rotating column. The power spiral blade has multiple blades, each of which is welded to the rotor center ring. The conical shearing blade is welded to the rotor center ring.

[0014] Preferably, the tangential inlet disc includes a tangential inlet cavity, a swirl support cavity, a swirl-inducing conical flow channel, a coalescing adsorption baffle, and a disc-shaped central overflow pipe. The swirl support cavity is welded to the tangential inlet cavity. The two ends of the swirl-inducing conical flow channel are respectively connected to the swirl support cavity and the coalescing adsorption baffle. The disc-shaped central overflow pipe is welded to the coalescing adsorption baffle and is flush with the bottom of the swirl support cavity. The disc-shaped central overflow pipe is welded to the center of the tangential inlet cavity and passes through the tangential inlet cavity.

[0015] Preferably, the outer wall of the swirl support cavity is connected to the inner wall of the coalescing cone, the material coalescing inverted cone is fixed on the coalescing adsorption baffle and the disc-shaped central overflow pipe, and the two ends of the disc-shaped central overflow pipe are respectively connected to the lock-type central overflow pipe and the equal pitch central overflow pipe.

[0016] Preferably, the constant pitch spiral flow channel and the variable pitch spiral flow channel have the same number of spiral flow channels, the dynamic shear rotor, the constant pitch spiral flow channel and the variable pitch spiral flow channel have the same direction of rotation, the pitch of the variable pitch spiral flow channel gradually decreases, and the bottom of the variable pitch central overflow pipe is provided with multiple arrayed liquid inlet holes.

[0017] Preferably, one end of the viscosity-reducing display tube is provided with a thread, the viscosity-reducing display tube is connected to the coalescing conical tube by the thread, the interior of the viscosity-reducing through hole is provided with a thread, and the viscosity-reducing through hole is connected to the viscosity-reducing rotating column by the thread.

[0018] (III) Beneficial Effects

[0019] The viscosity reduction, coalescence, and separation integrated device provided by this invention adopts a viscosity reduction structure combining dynamic and static shearing based on the mechanical shear viscosity reduction principle. Through the series-connected material coalescence and two spiral flow channels, it coalesces and separates small molecules of oil droplets after viscosity reduction. This not only enhances the versatility and convenience of the device's performance, but also effectively solves problems such as high viscosity and difficulty in separation of oil well produced fluids, and severe emulsification and difficulty in separation. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the integrated viscosity reduction, coalescence separation, and device of the present invention.

[0021] Figure 2 This is a cross-sectional view of the integrated viscosity-reducing and coalescence-separation device of the present invention;

[0022] Figure 3 This is an exploded view of the integrated viscosity-reducing, coalescence-separation device of the present invention.

[0023] Figure 4 This is an internal assembly diagram of the dynamic and static shear viscosity reduction unit according to an embodiment of the present invention;

[0024] Figure 5This is an exploded view of the dynamic and static shear viscosity reduction unit according to an embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the structure of the viscosity-reducing display window tube according to an embodiment of the present invention;

[0026] Figure 7 This is an assembly diagram of the viscosity-reducing device according to an embodiment of the present invention;

[0027] Figure 8 This is a schematic diagram of the structure of the viscosity-reducing rotary disk according to an embodiment of the present invention;

[0028] Figure 9 This is a schematic diagram of the structure of the dynamic shear rotor according to an embodiment of the present invention;

[0029] Figure 10 This is a schematic diagram of the structure of the power spiral blade in an embodiment of the present invention;

[0030] Figure 11 This is a schematic diagram of the conical shear blade according to an embodiment of the present invention;

[0031] Figure 12 This is a cross-sectional view of the coalescing separation unit according to an embodiment of the present invention;

[0032] Figure 13 This is an exploded view of the coalescing separation unit according to an embodiment of the present invention;

[0033] Figure 14 This is an assembly diagram of the coalescence device according to an embodiment of the present invention;

[0034] Figure 15 This is a sectional view of the tangential inlet disk according to an embodiment of the present invention;

[0035] Figure 16 This is a cross-sectional view of a coalescing inverted cone section according to an embodiment of the present invention;

[0036] Figure 17 This is a schematic diagram of the structure of a constant pitch helical flow according to an embodiment of the present invention;

[0037] Figure 18 This is a schematic diagram of the structure of the variable pitch spiral flow channel according to an embodiment of the present invention;

[0038] Figure 19 This is a cross-sectional view of the equal pitch center overflow pipe according to an embodiment of the present invention;

[0039] Figure 20 This is a cross-sectional view of the variable pitch center overflow pipe according to an embodiment of the present invention;

[0040] Figure 21 This is a schematic diagram of the installation of the viscosity-reducing rotary disc according to an embodiment of the present invention;

[0041] Figure 22This is a schematic diagram of the installation of the viscosity-reducing rotary disk according to an embodiment of the present invention.

[0042] Legend: 1-Viscosity-reducing display case; 2-Viscosity-reducing rotating disk; 3-Dynamic shearing rotor; 4-Lock-type center overflow pipe; 5-Rotor fixing cap; 6-Viscosity-reducing rotating column; 7-Coalescing conical cylinder; 8-Tangential inlet disk; 9-Material coalescence inverted cone; 10-Equal pitch spiral flow channel; 11-Equal pitch center overflow pipe; 12-Variable pitch center overflow pipe; 13-Variable pitch spiral flow channel; 14-Rotating disk display case hole; 15-Viscosity-reducing through-hole. 16-Perforation; 17-Rotary eye-shaped frame; 18-Rotor support frame; 19-Rotor rotating column; 20-Locked center hole; 21-Static shearing mesh; 22-Viscosity-reducing rotating hole; 23-Rotor center ring; 24-Power spiral blade; 25-Conical shearing blade; 26-Tangential inlet cavity; 27-Swirl support cavity; 28-Swirl-inducing conical flow channel; 29-Coalescing adsorption baffle; 30-Disc-type central overflow pipe; 31-Array of liquid inlet holes. Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] In the description of this invention, it is necessary to understand that the orientation or positional relationship indicated by terms such as "upper", "lower", "inner", "outer", "top", and "bottom" are based on the orientation or positional relationship shown in the accompanying drawings. The purpose is only to facilitate the description of this invention and to simplify the description. It is not intended to indicate or imply that the component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0045] Figure 1 This is a schematic diagram of the integrated viscosity reduction, coalescence separation, and other devices of the present invention. Figure 2 This is a cross-sectional view of the integrated viscosity reduction and coalescence separation device of the present invention. Figure 3 This is an exploded view of the integrated viscosity reduction, coalescence separation, and agglomeration device of the present invention. Figures 1 to 3As shown, this invention provides an integrated device for viscosity reduction, coalescence, and separation, specifically comprising: a dynamic and static shear viscosity reduction unit and a spiral coalescence separation unit. The dynamic and static shear viscosity reduction unit includes a viscosity reduction window cylinder 1, which has multiple turntable window holes 14. A viscosity reduction rotating disk 2 is inserted into the viscosity reduction window cylinder 1 through the turntable window holes 14. Multiple viscosity reduction through holes 15 are provided on the side wall of the viscosity reduction window cylinder 1. A viscosity reduction rotating column 6 is inserted into each viscosity reduction through hole 15. The viscosity reduction rotating column 6 is connected to the viscosity reduction rotating disk 2. Two dynamic shear rotors 3 are installed inside each viscosity reduction rotating disk 2. The top of the dynamic shear rotor 3 is secured by a rotor fixing cap. 5. Fixed, multiple viscosity-reducing rotating disks 2 are all connected to a lockable central overflow pipe 4. The spiral coalescing separation unit includes a coalescing cone 7. The coalescing cone 7 is detachably connected to the viscosity-reducing window cylinder 1. The inner side of the coalescing cone 7 is connected to a tangential inlet disk 8. The tangential inlet disk 8 is connected to the lockable central overflow pipe 4. The tangential inlet disk 8 is connected to a material coalescing inverted cone 9. The tail end of the tangential inlet disk 8 is connected to a constant pitch central overflow pipe 11. The constant pitch central overflow pipe 11 is connected to a constant pitch spiral flow channel 10. The tail end of the constant pitch central overflow pipe 11 is connected to a variable pitch central overflow pipe 12. The variable pitch central overflow pipe 12 is connected to a variable pitch spiral flow channel 13.

[0046] Figure 4 This is an internal assembly diagram of the dynamic and static shear viscosity reduction unit according to an embodiment of the present invention. Figure 5 This is an exploded view of the dynamic and static shear viscosity reduction unit according to an embodiment of the present invention, as shown below. Figure 4 and Figure 5 As shown, in this device, the dynamic and static shearing and viscosity reduction unit includes a viscosity reduction window cylinder 1, a viscosity reduction rotating disk 2, a dynamic shearing rotor 3, a lock-type central overflow pipe 4, a rotor fixing cap 5, and a viscosity reduction rotating column 6.

[0047] Figure 6 This is a schematic diagram of the structure of the viscosity-reducing display window tube according to an embodiment of the present invention, as shown below. Figure 6 As shown, in practical applications, one end of the viscosity-reducing window tube 1 is provided with a thread, and the viscosity-reducing window tube 1 is connected to the coalescing cone tube 7 through the thread. The inside of the viscosity-reducing through hole 15 is provided with a thread, and the viscosity-reducing through hole 15 is connected to the viscosity-reducing rotating column 6 through the thread.

[0048] It is important to note that Figure 21 This is a schematic diagram of the installation of the viscosity-reducing rotary disc according to an embodiment of the present invention. Figure 22 This is a schematic diagram of the installation of the viscosity-reducing rotary disc according to an embodiment of the present invention, as shown below. Figure 21 and Figure 22As shown, in this device, the viscosity-reducing display tube 1 has multiple rotary display holes 14. The multiple rotary display holes 14 are divided into multiple groups of four. The arrangement of the four in each group is as follows: from top to bottom, the spacing is equal and they are staggered. The four rotary display holes 14 surround the viscosity-reducing display tube 1. The interval between any two adjacent rotary display holes 14 is 90°. The viscosity-reducing display tube 1 is connected to the viscosity-reducing rotating disk 2 through the rotary display holes 14. In addition, the side wall of the viscosity-reducing display tube 1 is provided with multiple viscosity-reducing through holes 15. Multiple viscosity-reducing rotating columns 6 are inserted into the viscosity-reducing through holes 15. The inside of the viscosity-reducing through holes 15 is provided with threads, and the viscosity-reducing through holes 15 fix the viscosity-reducing rotating columns 6.

[0049] Figure 7 This is an assembly diagram of the viscosity reduction device according to an embodiment of the present invention, as shown below. Figure 7 As shown, in practical applications, the viscosity-reducing rotating disk 2 and the dynamic shearing rotor 3 together constitute a viscosity-reducing device.

[0050] Figure 8 This is a schematic diagram of the structure of the viscosity-reducing rotary disk according to an embodiment of the present invention, as shown below. Figure 8 As shown, the viscosity-reducing rotary disk 2 includes a rotary disk eye-shaped frame 16, a rotor support frame 17, a static shearing mesh 20, a rotor rotating column 18, and a locking center hole 19. A viscosity-reducing rotating hole 21 is provided on one side of the rotary disk eye-shaped frame 16. Two rotor support frames 17 are welded to the bottom of the rotary disk eye-shaped frame 16. Multiple static shearing meshes 20 are welded to the bottom of the rotary disk eye-shaped frame 16. Each static shearing mesh 20 is welded to a rotor support frame 17. The rotor support frame 17 is welded to a rotor rotating column 18. The two rotor support frames 17 are perpendicular to each other. A locking center hole 19 is provided at the intersection of the two rotor support frames 17.

[0051] In practical applications, the viscosity-reducing rotating disk 2 is concentrically connected to the viscosity-reducing rotating column 6 through the viscosity-reducing rotating hole 21. The clearance fit between the viscosity-reducing rotating hole 21 and the viscosity-reducing rotating column 18 facilitates the installation and fixation of the viscosity-reducing device. The viscosity-reducing rotating disk 2 is connected to the locking center overflow pipe 4 through the locking center hole 19. The viscosity-reducing rotating disk 2 is connected to the dynamic shearing rotor 3 through the rotor rotating column 18.

[0052] It should be noted that the cross-section of the static shearing mesh 20 is triangular pyramidal, and the circumferential outer contour of the static shearing mesh 20 is circular. The static shearing mesh 20 is used for static shearing and viscosity reduction of polymer-containing produced fluid. In addition, the lock-type central overflow pipe 4 is connected to all viscosity-reducing rotating disks 2 to fix the circumferential movement of the viscosity-reducing rotating disks 2. The rotor fixing cap 5 has internal threads and is threadedly connected to the rotor rotating column 18 to fix the axial movement of the dynamic shearing rotor.

[0053] Figure 9 This is a schematic diagram of the structure of the dynamic shear rotor according to an embodiment of the present invention. Figure 10 This is a schematic diagram of the structure of the power spiral blade according to an embodiment of the present invention. Figure 11 This is a schematic diagram of the conical shear blade according to an embodiment of the present invention, as shown below. Figures 9 to 11 As shown, in this device, the dynamic shearing rotor 3 includes a rotor center ring 22, a power spiral blade 23, and a conical shearing blade 24. The rotor center ring 22 is connected to the rotor rotating column 18. The power spiral blade 23 has multiple blades, and the rotation direction is clockwise. Each blade of the power spiral blade 23 is welded to the rotor center ring 22. The conical shearing blade 24 is welded to the rotor center ring 22.

[0054] In practical applications, the cross-section of the conical shear blade 24 is an isosceles triangle, and the direction of rotation of the vertex of the triangle is consistent with the direction of rotation of the power spiral blade 23. The conical shear blade 24 is welded to the rotor center ring 22. Each dynamic shearing rotor 3 is provided with multiple conical shear blades 24, with 4 conical shear blades 24 in each group, divided into multiple groups. The 4 conical shear blades 24 in each group are spaced 90° apart, and the conical shear blades 24 between groups are offset by 30° in the circumference.

[0055] Figure 12 This is a cross-sectional view of the coalescing separation unit according to an embodiment of the present invention. Figure 13 The exploded view of the coalescing separation unit in this embodiment of the invention shows that the spiral coalescing separation unit includes a coalescing conical cylinder 7, a tangential inlet disk 8, a material coalescing inverted cone 9, a constant pitch spiral flow channel 10, a constant pitch central overflow pipe 11, a variable pitch central overflow pipe 12, and a variable pitch spiral flow channel 13.

[0056] Figure 14 This is an assembly diagram of the coalescence device according to an embodiment of the present invention, as shown below. Figure 14 As shown, the tangential inlet disk 8 and the material coalescing inverted cone 9 together form a coalescing device.

[0057] Figure 15 This is a sectional view of the tangential inlet disk according to an embodiment of the present invention, such as... Figure 15 As shown, in practical applications, the tangential inlet disc 8 includes a tangential inlet cavity 25, a swirling support cavity 26, a swirling conical flow channel 27, a coalescing adsorption baffle 28, and a disc-shaped central overflow pipe 29. The side wall of the tangential inlet cavity 25 has four tangential array inlets. The swirling support cavity 26 is welded to the tangential inlet cavity 25. The outer wall of the swirling support cavity 26 has the same shape as the inner wall of the coalescing conical cylinder 7. The two ends of the swirling conical flow channel 27 are respectively connected to the swirling support cavity 26 and the coalescing adsorption baffle 28. The coalescing adsorption baffle 28 is welded to the disc-shaped central overflow pipe 29. The coalescing adsorption baffle 28 is flush with the bottom of the swirling support cavity 26. The disc-shaped central overflow pipe 29 is welded to the center of the tangential inlet cavity 25 and penetrates through the tangential inlet cavity 25.

[0058] It should be noted that in this device, the swirling conical flow channel 27 has two flow channels, namely the first flow channel and the second flow channel. The swirling conical flow channel 27 is embedded in the swirling support cavity 26. The cross-section of the first flow channel and the second flow channel is rhomboid. The top of the swirling support cavity 26 is welded to the top of the first flow channel, and the coalescing adsorption baffle 28 is welded to the bottom of the second flow channel. In practical applications, the swirling support cavity 26 is attached to the inner wall of the coalescing conical cylinder 7, and the two are connected together. The two ends of the disc-type central overflow pipe 28 are respectively connected to the lock-type central overflow pipe 4 and the equal pitch central overflow pipe 11.

[0059] Figure 16 This is a cross-sectional view of the coalescing inverted cone section of an embodiment of the present invention, as shown below. Figure 16 As shown, in this device, the material coalescence cone 9 is composed of modified kapok fiber with hydrophobic and oleophilic materials. The material coalescence cone 9 is fixed on the coalescence adsorption baffle 28 and the disc-shaped central overflow pipe 29. When the oil-water mixture flows through the material coalescence cone 9, the material coalescence cone 9 will initially coalesce the small molecules of the oil phase.

[0060] Figure 17 This is a schematic diagram of the structure of a constant-pitch helical flow according to an embodiment of the present invention. Figure 18 This is a schematic diagram of the structure of the variable pitch spiral flow channel according to an embodiment of the present invention. Figure 19 This is a cross-sectional view of the equal pitch center overflow pipe according to an embodiment of the present invention. Figure 20 This is a cross-sectional view of the variable pitch center overflow pipe according to an embodiment of the present invention. The equal pitch spiral flow channel 10 consists of 5 spiral flow channels. The spiral direction of the equal pitch spiral flow channel 10 is consistent with the spiral direction of the power spiral blade 23. An internal thread is opened at the center of the equal pitch spiral flow channel 10. The equal pitch spiral flow channel 10 is threaded to the equal pitch center overflow pipe 11. Both sides of the equal pitch center overflow pipe 10 are threaded. The top of the equal pitch center overflow pipe 10 is threaded to the disc-type center overflow pipe 29. The bottom of the center overflow pipe 10 is threadedly connected to the variable pitch center overflow pipe 11; the bottom of the variable pitch center overflow pipe 11 is provided with multiple arrayed liquid inlet holes 30, the variable pitch spiral flow channel 13 is composed of 5 spiral flow channels, the spiral direction of the variable pitch spiral flow channel 13 is the same as that of the constant pitch spiral flow channel 18, the pitch of the variable pitch spiral flow channel 13 gradually decreases, the center of the flow channel of the variable pitch spiral flow channel 13 is provided with internal thread, and the variable pitch spiral flow channel 13 is threadedly connected to the variable pitch center overflow pipe 12.

[0061] It should be noted that the connection method for each level of overflow pipe is the same.

[0062] In practical applications, this device is equipped with a dynamic and static shearing viscosity reduction unit and a spiral coalescing separation unit. The shearing rate of the dynamic shearing rotor 3 can be automatically adjusted according to the amount of liquid entering the system. Then, the static shearing mesh 20 performs filtration and shearing to achieve the viscosity reduction requirement. Subsequently, the low-viscosity oil-water mixture flows into the spiral coalescing separation unit through the tangential inlet disk 8. The flow direction of the oil-water mixture changes from axial flow to tangential spiral flow. After passing through the material coalescing inverted cone 9, the small molecules of the oil phase initially coalesce. Finally, the oil-water mixture flows into the equal pitch spiral channel 10 and the variable pitch spiral channel 13 in succession. The density difference between the oil phase and the water phase is used for swirling separation. The oil phase molecules coalesce into large molecules and flow out through the array of inlet holes 30 of the central overflow pipe, while the water phase molecules flow out through the annular underflow pipe.

[0063] This device integrates viscosity reduction, coalescence, and separation, and systematically solves a series of problems such as difficulty in oil-water separation, severe emulsification, and poor separation effect under produced fluid pretreatment.

[0064] The working principle of this integrated viscosity reduction, coalescence, and separation device is described in detail below:

[0065] In this embodiment, the viscosity-reducing display window cylinder 1 is connected to the coalescing conical cylinder 7 via a thread. The viscosity-reducing display window cylinder 1 has 12 rotary display window holes 14. The viscosity-reducing rotary disk 2 is inserted into the viscosity-reducing display window cylinder 1 through the rotary display window holes 14. Four viscosity-reducing through holes 15 are provided on the side wall of the viscosity-reducing display window cylinder 1. Four viscosity-reducing rotating columns 6 are inserted into the viscosity-reducing through holes 15. The viscosity-reducing rotating columns 6 are connected to the viscosity-reducing rotary disk 2. Two dynamic shearing rotors 3 are installed inside each viscosity-reducing rotary disk 2. The top of the dynamic shearing rotor 3... The end is fixed by the rotor fixing cap 5. All 12 viscosity-reducing rotating disks 2 are connected to the locking center overflow pipe 4. The locking center overflow pipe 4 is connected to the tangential inlet disk 8. The tangential inlet disk 8 is connected to the material coalescence inverted cone 9. The tail end of the tangential inlet disk 8 is connected to the equal pitch center overflow pipe 11. The equal pitch center overflow pipe 11 is connected to the equal pitch spiral flow channel 10. The tail end of the equal pitch center overflow pipe 11 is connected to the variable pitch center overflow pipe 12. The variable pitch center overflow pipe 12 is connected to the variable pitch spiral flow channel 13.

[0066] In practical applications, the 12 rotary display window holes 14 are divided into 3 groups of 4. The arrangement of the 4 holes in each group is as follows: from top to bottom, the spacing is equal and they are staggered. The 4 rotary display window holes 14 surround the viscosity-reducing display window tube 1. The interval between any two adjacent rotary display window holes 14 is 90°.

[0067] In addition, in this embodiment, the viscosity-reducing rotary disk 2 is provided with a rotary disk eye-shaped frame 16, and nine static shearing meshes 20 are welded to the bottom of the rotary disk eye-shaped frame 16. The rotor support frame 17 is welded to the bottom of the rotary disk eye-shaped frame 16, and at the same time, all nine static shearing meshes 20 are welded to the rotor support frame 17.

[0068] In practical applications, the dynamic shearing rotor 3 includes a rotor center ring 22, a power spiral blade 23, and a conical shearing blade 24. The power spiral blade 22 has 6 blades, and the spiral direction of the power spiral blade 22 is clockwise. The rotor center ring 22 is welded to each blade. The cross section of the conical shearing blade 24 is an isosceles triangle, and the spiral direction of the vertex of the triangle is consistent with the spiral direction of the power spiral blade 23. The conical shearing blade 24 is welded to the rotor center ring 22. In this embodiment, the dynamic shearing rotor 3 has 12 conical shearing blades 24, divided into 3 groups, with 4 conical shearing blades in each group. The 4 conical shearing blades 24 in each group are spaced 90° apart, and the conical shearing blades 24 between groups are offset by 30° circumferentially.

[0069] In addition, in this embodiment, the bottom of the variable pitch central overflow pipe 12 has 24 arrayed liquid inlet holes 30, in a total of 6 rows and 4 columns. The oil phase flows into the overflow pipe through the arrayed liquid inlet holes 30 and is discharged, while the water phase is discharged from the bottom of the coalescing conical cylinder 7.

[0070] In practical applications, the polymer-containing produced fluid flows axially into the annular space between the viscosity-reducing window cylinder 1 and the lock-type central overflow pipe 4. After being sheared by the dynamic shearing rotor 3 on the viscosity-reducing rotating disk 2 and the static shearing mesh 9 at the bottom of the viscosity-reducing rotating disk 2, the viscosity is reduced.

[0071] In this embodiment, the polymer-containing produced fluid flows into the viscosity reduction device, which drives the rotation of the power spiral blade 3, thereby causing the rotor center 22 to rotate. The conical shear blade 24 welded on the rotor center ring 22 dynamically shears and reduces the viscosity of the polymer-containing produced fluid.

[0072] In practical applications, low-viscosity oil-water mixtures flow into the coalescing separation unit through the tangential inlet disc 8. Under the action of the built-in swirling conical flow channel 27, the axial flow is transformed into tangential spiral flow. The material coalescing cone 9 initially coalesces small oil phase molecules. The constant pitch spiral flow channel 10 and the variable pitch spiral flow channel 13 further coalesce the oil phase molecules. Among them, the variable pitch spiral flow channel 13 has a stronger coalescing effect on oil phase molecules compared with the constant pitch spiral flow channel 11. At the same time, the oil and water phases begin to separate after passing through the two spiral flow channels due to their different densities. The oil phase flows into the overflow pipe from the array of inlet holes 30 of the variable pitch central overflow pipe 12, and then passes through the constant pitch central overflow pipe 11 and the disc-type central overflow pipe 29 from bottom to top, and is finally discharged through the lock-type central overflow pipe 4. The water phase is directly discharged from the coalescing cone 7.

[0073] It should be noted that when the oil-water mixture flows through the equal pitch spiral channel 10, it will further aggregate the oil phase molecules after the material has aggregated, and the oil and water phases will also separate due to their different densities.

[0074] The viscosity reduction, coalescence, and separation integrated device provided by this invention adopts a viscosity reduction structure combining dynamic and static shearing based on the mechanical shear viscosity reduction principle. Through the series-connected material coalescence and two spiral flow channels, it coalesces and separates small molecules of oil droplets after viscosity reduction. This not only enhances the versatility and convenience of the device's performance, but also effectively solves problems such as high viscosity and difficulty in separation of oil well produced fluids, and severe emulsification and difficulty in separation.

[0075] The above embodiments are only used to illustrate the present invention and are not intended to limit the present invention. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions also fall within the scope of the present invention, and the patent protection scope of the present invention should be defined by the claims.

Claims

1. An integrated device for viscosity reduction, coalescence separation, characterized in that, include: The dynamic and static shear viscosity reduction unit and the spiral coalescence separation unit include a viscosity reduction window cylinder (1), a viscosity reduction rotating disk (2), a dynamic shear rotor (3), a lock-type central overflow pipe (4), a rotor fixing cap (5), and a viscosity reduction rotating column (6). The viscosity reduction window cylinder (1) is provided with multiple rotating disk window holes (14). The viscosity reduction window cylinder (1) is connected to the viscosity reduction rotating disk (2) through the rotating disk window holes (14). The side wall of the viscosity reduction window cylinder (1) is provided with multiple viscosity reduction through holes (15). A viscosity reduction rotating column (6) is inserted into each viscosity reduction through hole (15). The viscosity reduction rotating column (6) is connected to the viscosity reduction rotating disk (2). Two dynamic shear rotors (3) are installed inside each viscosity reduction rotating disk (2). The top of the dynamic shear rotor (3) is fixed by the rotor fixing cap (5). Multiple viscosity reduction rotating disks (2) are connected to the lock-type central overflow pipe (4). The multiple turntable window holes (14) are divided into multiple groups. Each group of turntable window holes (14) is arranged from top to bottom with equal spacing and staggered arrangement. Each group of turntable window holes surrounds the reduced viscosity window tube (1) once. The viscosity-reducing rotating disk (2) includes a rotating eye frame (16), a rotor support frame (17), a static shearing mesh (20), a rotor rotating column (18), and a locking center hole (19). A viscosity-reducing rotating hole (21) is provided on one side of the rotating eye frame (16). Two rotor support frames (17) are welded to the bottom of the rotating eye frame (16). Multiple static shearing meshes (20) are welded to the bottom of the rotating eye frame (16). Each static shearing mesh (20) is welded to the rotor support frame (17). The rotor support frame (17) is welded to the rotor rotating column (18). The two rotor support frames (17) are perpendicular to each other. A locking center hole (19) is provided at the intersection of the two rotor support frames (17). The cross-section of the static shearing mesh (20) is triangular pyramidal, and the circumferential outer contour of the static shearing mesh (20) is circular. The spiral coalescing separation unit includes a coalescing cone (7), a tangential inlet disc (8), a material coalescing inverted cone (9), a constant pitch spiral channel (10), a constant pitch central overflow pipe (11), a variable pitch central overflow pipe (12), and a variable pitch spiral channel (13). The inner side of the coalescing cone (7) is connected to the tangential inlet disc (8), the tangential inlet disc (8) is connected to the material coalescing inverted cone (9), the tail end of the tangential inlet disc (8) is connected to the constant pitch central overflow pipe (11), the constant pitch central overflow pipe (11) is connected to the constant pitch spiral channel (10), the tail end of the constant pitch central overflow pipe (11) is connected to the variable pitch central overflow pipe (12), and the variable pitch central overflow pipe (12) is connected to the variable pitch spiral channel (13). The dynamic and static shear viscosity reduction unit is connected to the spiral coalescing separation unit. The viscosity reduction window tube (1) is detachably connected to the coalescing cone tube (7). The lock-type central overflow pipe (4) is connected to the tangential inlet plate (8).

2. The integrated device for viscosity reduction, coalescence separation, and resolving according to claim 1, characterized in that, The viscosity-reducing rotating disk (2) is concentrically connected to the viscosity-reducing rotating column (6) through the viscosity-reducing rotating hole (21). The viscosity-reducing rotating disk (2) is connected to the lock-type central overflow pipe (4) through the lock-type central hole (19). The viscosity-reducing rotating disk (2) is connected to the dynamic shearing rotor (3) through the rotor rotating column (18).

3. The integrated device for viscosity reduction, coalescence separation, and resolving according to claim 1, characterized in that, The dynamic shearing rotor (3) includes a rotor center ring (22), a power spiral blade (23) and a conical shearing blade (24). The rotor center ring (22) is connected to the rotor rotating column (18). The power spiral blade (23) has multiple blades, and each blade is welded to the rotor center ring (22). The conical shearing blade (24) is welded to the rotor center ring (22).

4. The integrated device for viscosity reduction, coalescence separation, and resolving according to claim 1, characterized in that, The tangential inlet disc (8) includes a tangential inlet cavity (25), a swirling support cavity (26), a swirling conical flow channel (27), a coalescing adsorption baffle (28), and a disc-shaped central overflow pipe (29). The tangential inlet cavity (25) is welded to the swirling support cavity (26). The two ends of the swirling conical flow channel (27) are respectively connected to the swirling support cavity (26) and the coalescing adsorption baffle (28). The coalescing adsorption baffle (28) is welded to the disc-shaped central overflow pipe (29). The coalescing adsorption baffle (28) is flush with the bottom of the swirling support cavity (26). The disc-shaped central overflow pipe (29) is welded to the center of the tangential inlet cavity (25) and penetrates the tangential inlet cavity (25).

5. The integrated device for viscosity reduction, coalescence separation, and resolving according to claim 4, characterized in that, The outer wall of the swirling support cavity (26) is connected to the inner wall of the coalescing cone (7). The material coalescing inverted cone (9) is fixed on the coalescing adsorption baffle (28) and the disc-shaped central overflow pipe (29). The two ends of the disc-shaped central overflow pipe (29) are respectively connected to the lock-type central overflow pipe (4) and the equal pitch central overflow pipe (11).

6. The integrated device for viscosity reduction, coalescence separation, and resolving according to claim 1, characterized in that, The equal pitch spiral channel (10) and the variable pitch spiral channel (13) are provided with the same number of spiral channels. The dynamic shear rotor (3), the equal pitch spiral channel (10) and the variable pitch spiral channel (13) have the same direction of rotation. The pitch of the variable pitch spiral channel (13) gradually decreases. The bottom of the variable pitch central overflow pipe (12) is provided with multiple arrayed liquid inlet holes (30).

7. The integrated device for viscosity reduction, coalescence separation, and resolving according to claim 6, characterized in that, One end of the viscosity-reducing window tube (1) is provided with a thread, and the viscosity-reducing window tube (1) is connected to the coalescing cone tube (7) by the thread. The inside of the viscosity-reducing through hole (15) is provided with a thread, and the viscosity-reducing through hole (15) is connected to the viscosity-reducing rotating column (6) by the thread.

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