A new type of oil-gas-water-sand separator for oil field

Abstract

The utility model relates to oil gas water sand separation technical field especially discloses a novel oil gas water sand separator for oil field, including horizontal tank body, the tank body inside is provided with filler assembly and oil outlet adjusting assembly, the tank body top is provided with liquid inlet pipe, exhaust pipe, pressure interface and liquid level measurement interface, the tank body bottom is provided with water outlet, blowdown and sand outlet cone cylinder, the tank body bottom is provided with sand discharge cleaning assembly corresponding with sand outlet cone cylinder, and sand discharge cleaning assembly includes outer sleeve tube, T type inner tube, sand washing pipe and bellows. The utility model discloses through the axial movement of T type inner tube relative to outer sleeve tube and the angle adjustment of sand washing pipe relative to horizontal pipe, expands the coverage of sand washing pipe to sand outlet cone cylinder, eliminates sand cleaning dead angle, improves sand cleaning efficiency, avoids the situation of jam, guarantees the separation effect, adjusts the installation height of oil outlet inner cylinder relative to oil outlet outer cylinder through screw connection, expands the control range of oil water interface, and the oil layer thickness control is accurate.

Description

Technical Field

[0001] This utility model relates to the field of oil-gas-water-sand separation technology, and in particular to a novel oil-gas-water-sand separator for oil fields. Background Technology

[0002] In oil and gas field surface engineering, the produced fluid from oil wells is usually a mixture of oil, gas, water, sand, etc. When the mixture moves through the formation pores and wellbore, it inevitably carries solid impurities such as mud and sand. In order to meet the needs of oil and gas well product metering, field processing, storage and pipeline transportation, it is necessary to separate the oil, gas, water and sand mixture formed in the well products.

[0003] Application number CN216517940U discloses a high-temperature steam co-core dual-tube jet pump steam injection and sand removal oil-gas-water-sand separator, including a horizontal closed shell. The top left and right ends of the shell are provided with liquid inlets. A liquid buffer device is provided inside the shell corresponding to each liquid inlet position. Two packing coalescers are provided on the left and right sides of the shell between the two liquid buffer devices. A gas outlet and an oil outlet are respectively provided at the top and middle of the shell between the two packing coalescers. A sand removal device is provided at the bottom of the shell. Drainage outlets are provided at the bottom of the shell on the left and right sides of the sand removal device. A sewage outlet is provided at the bottom of the shell to the left of the left drainage outlet. The sand removal device may include two conical sand settling tanks set at the bottom of the shell. A T-shaped sand flushing pipe is provided at the bottom of the shell between the two sand settling tanks. The water inlet of the lower part of the T-shaped sand flushing pipe is fixedly installed at the bottom of the shell. The two water outlets of the upper part of the T-shaped sand flushing pipe are respectively located above the two sand settling tanks and aligned with the inside of the sand settling tanks.

[0004] Although this patent can separate oil, gas, water, and sand mixtures, the oil outlet size of this technical solution is fixed, and the control range of the oil-water interface and the oil layer thickness is limited. In addition, the T-shaped sand flushing pipe and the sand settling tank are relatively fixed in position, resulting in a large number of dead corners during sand flushing. Incomplete cleaning leads to the accumulation of organic cemented sand clumps on the sand settling tank wall, posing a risk of blockage and affecting the separation effect.

[0005] Therefore, it is necessary to propose an improved new type of oil-gas-water-sand separator for oil fields to overcome the shortcomings of existing technologies. Utility Model Content

[0006] The purpose of this invention is to solve the problems in the prior art and provide a new type of oil-gas-water-sand separator for oil fields.

[0007] The technical solution of this utility model is: A novel oil-gas-water-sand separator for oil fields includes a horizontal tank. Inside the tank, there are packing components and an oil outlet regulating component. The top of the tank is equipped with an inlet pipe, an exhaust pipe, a pressure interface, and a liquid level measuring interface. The bottom of the tank is equipped with a water outlet, a sewage outlet, and two sand discharge cones. Inside the tank, there are concave end caps and inclined plates corresponding to the inlet pipe. At the bottom of the tank, there are two sand discharge cleaning components, one for each of the two sand discharge cones.

[0008] Preferably, the oil outlet regulating component includes an outer oil outlet cylinder, an inner oil outlet cylinder, and an oil outlet pipe. The inner oil outlet cylinder is connected to the inner wall of the tank via a channel steel. The outer wall of the inner oil outlet cylinder is provided with an external thread, and the inner wall of the outer oil outlet cylinder is provided with an internal thread. The external and internal threads are matched. One end of the oil outlet pipe is located at the bottom of the inner oil outlet cylinder, and the other end of the oil outlet pipe extends to the outside of the tank. Both the internal and external threads are fine-pitch threads.

[0009] Preferably, a wire mesh demister is installed inside the exhaust pipe.

[0010] Preferably, multiple sampling tubes are provided on one end cap of the tank body, and manholes are provided on the top of the tank body and the end cap of the other side of the tank body.

[0011] Preferably, saddles are provided at both ends of the bottom of the tank.

[0012] Preferably, the sand removal and cleaning assembly includes an outer casing, a T-shaped inner pipe, and a sand flushing pipe. The outer casing is located at the bottom of the outside of the tank. The T-shaped inner pipe includes a vertical pipe and a horizontal pipe. The vertical pipe is inserted into and slidably connected inside the outer casing. The horizontal pipe is located inside the tank. Two sand flushing pipes are connected to both ends of the horizontal pipe through an adjustment mechanism. The two sand flushing pipes correspond to two sand discharge cones, respectively. A corrugated pipe is connected between the horizontal pipe and the sand flushing pipe.

[0013] Preferably, the adjusting mechanism includes a first connecting seat, a second connecting seat, and a tilting actuator. One end of the first connecting seat is fixed to the horizontal pipe, and one end of the second connecting seat is fixed to the sand flushing pipe. The other end of the first connecting seat is hinged to the other end of the second connecting seat. A first hinge seat is provided on the first connecting seat, and a second hinge seat is provided on the second connecting seat. The fixed end of the tilting actuator is hinged to the second hinge seat, and the extended end of the tilting actuator is hinged to the first hinge seat.

[0014] Preferably, a rack is provided on the outer wall of the vertical tube, and a long groove is provided on the wall of the outer tube. The rack and the long groove are slidably engaged. A motor is provided on the outer tube, and a gear is provided on the output shaft of the motor. The gear meshes with the rack.

[0015] Preferably, both ends of the corrugated pipe are connected to the horizontal pipe and the sand flushing pipe respectively via quick-connect coupling clamp sets.

[0016] Compared with the prior art, the beneficial effects of this utility model are: 1. The installation height of the inner oil outlet cylinder relative to the outer oil outlet cylinder can be adjusted through the threaded connection between the inner oil outlet cylinder and the outer oil outlet cylinder, which expands the control range of the oil-water interface. By adopting a fine-tuning method, the adjustment accuracy is high and the oil layer thickness is precisely controlled. 2. By adjusting the axial movement of the T-shaped inner tube relative to the outer tube and the angle of the sand flushing pipe relative to the horizontal tube, the coverage area of ​​the sand flushing pipe on the sand discharge cone is expanded, eliminating dead angles in sand cleaning, improving sand cleaning efficiency, avoiding blockage, and ensuring separation effect. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 This is a three-dimensional structural diagram of the oil outlet regulating component of this utility model; Figure 4 This is a cross-sectional view of the oil outlet regulating component of this utility model; Figure 5 This is a schematic diagram of the sand removal and cleaning component structure of this utility model. Figure 1 ; Figure 6 This is a schematic diagram of the sand removal and cleaning component structure of this utility model. Figure 2 .

[0018] The components include: 1. Tank body; 2. Packing assembly; 3. Inlet pipe; 4. Exhaust pipe; 5. Pressure interface; 6. Liquid level measurement interface; 7. Outlet; 8. Sewage outlet; 9. Sand discharge cone; 10. Outer sleeve; 11. T-shaped inner pipe; 111. Vertical pipe; 112. Horizontal pipe; 12. Sand flushing pipe; 13. Corrugated pipe; 14. First connecting seat; 15. Second connecting seat; 16. Tilting actuator; 17. 18. First hinge seat; 19. Second hinge seat; 20. Quick-connect coupling clamp set; 21. Outer oil outlet cylinder; 22. Inner oil outlet cylinder; 23. Oil outlet pipe; 24. Channel steel; 25. External thread; 26. Internal thread; 27. Wire mesh demister; 28. Concave end cap; 29. ​​Inclined plate; 30. Sampling tube; 31. Manhole; 32. Saddle; 33. Rack; 34. Motor; 35. Gear; 36. Long slot. Detailed Implementation

[0019] To make the technical means, technical features, utility model purpose and technical effects of this utility model easier to understand, the present utility model will be further described below with reference to specific illustrations.

[0020] like Figures 1-6As shown, a novel oil-gas-water-sand separator for oilfield use includes a horizontal tank 1. Inside the tank 1, a packing assembly 2 and an oil outlet regulating assembly are installed. The packing assembly 2 improves the separation efficiency. The packing assembly 2 is an application of existing technology, and its structure will not be described in detail here. At the top of the tank 1 are an inlet pipe 3, an exhaust pipe 4, a pressure port 5, and a liquid level measuring port 6. Inside the tank 1 are concave end caps 27 and inclined plates 28 corresponding to the inlet pipe 3. At the bottom of the tank 1 is a water outlet. The tank 1 has an outlet 7, a drain outlet 8, and two sand discharge cones 9. A sand discharge cleaning assembly corresponding to the two sand discharge cones 9 is also connected to the bottom of the tank 1. Multiple sampling tubes 29 are installed on one side of the tank 1's end cap. Manholes 30 are installed on the top of the tank 1 and the end cap on the other side of the tank 1. The inlet pipe 3 sprays the mixed liquid into the tank 1. The end of the inlet pipe 3 is bent, changing the spray direction of the mixed liquid so that it first sprays onto the concave end cap 27 for dispersion, reducing the flow rate of the mixed liquid. The dispersed mixed liquid then falls... Separation is performed on the inclined plate 28 to perform primary separation of oil, gas, water, and sand, improving the initial separation effect. The exhaust pipe 4 is connected to an external exhaust line to discharge the gas from the tank 1. The pressure interface 5 is equipped with a pressure gauge to measure and display the pressure inside the tank 1. The liquid level measurement interface 6 is equipped with a liquid level sensor to measure the liquid level inside the tank 1. The oil after oil-water separation is discharged from the oil outlet regulating component, and the oil layer thickness and oil-water interface are controlled by adjusting the oil outlet regulating component. The water after oil-water separation is discharged from the water outlet 7. The sand and gravel settle into the sand discharge cone 9 and are cleaned in conjunction with the sand discharge cleaning component. Other pollutants generated during separation are discharged from the drain outlet 8. During the separation process, the inside of the tank 1 can be sampled and analyzed through the sampling tube 29. Multiple sampling tubes 29 are installed at different heights to achieve sampling operations at different liquid levels. The manhole 30 is set up to facilitate operator inspection and maintenance. Saddles 31 are connected to both ends of the bottom of the tank 1 to ensure the stable placement of the tank 1.

[0021] like Figure 3 and Figure 4As shown, the oil outlet regulating assembly includes an outer oil outlet cylinder 20, an inner oil outlet cylinder 21, and an oil outlet pipe 22. The inner oil outlet cylinder 21 is connected to the inner wall of the tank body 1 via a channel steel 23, ensuring a stable and reliable connection. The upper end of the outer wall of the inner oil outlet cylinder 21 is machined with an external thread 24, and the inner wall of the outer oil outlet cylinder 20 is machined with an internal thread 25. The external thread 24 and the internal thread 25 are mated together, and both the internal thread 25 and the external thread 24 are fine-pitch threads. The outer oil outlet cylinder 20 is connected to the inner oil outlet cylinder 21 through the mating of the external thread 24 and the internal thread 25, ensuring a sealed connection while achieving dynamic adjustment of the outer oil outlet cylinder 20 relative to the inner oil outlet cylinder 21. The control range of the oil-water interface is extended to 300-800mm. Fine-pitch threads are used to achieve fine adjustment, resulting in high adjustment accuracy. The oil layer thickness is controlled through height fine adjustment. One end of the oil outlet pipe 22 is connected to the bottom of the inner oil outlet cylinder 21, and the other end of the oil outlet pipe 22 extends to the outside of the tank body 1 to connect to the oil pipeline.

[0022] like Figure 2 As shown, a wire mesh demister 26 is installed inside the exhaust pipe 4. When the gas is discharged to the outside of the tank 1, the wire mesh demister 26 removes the oil mist entrained in the gas, avoiding losses, reducing corrosion of the exhaust pipeline, and extending its service life.

[0023] like Figure 5 and Figure 6 As shown, the sand removal and cleaning assembly includes an outer sleeve 10, a T-shaped inner tube 11, and sand flushing pipes 12. The outer sleeve 10 is fixedly installed at the bottom of the outer side of the tank body 1. The T-shaped inner tube 11 includes a vertical tube 111 and a horizontal tube 112 that are interconnected. The vertical tube 111 is inserted into and slidably connected inside the outer sleeve 10. A sealing structure is installed between the outer wall of the vertical tube 111 and the inner wall of the outer sleeve 10 to ensure a reliable seal between the vertical tube 111 and the outer sleeve 10 and to prevent leakage. The sealing structure is an application of existing technology. The horizontal tube 112 is located inside the tank body 1. There are two sand flushing pipes 12. 12 is connected to both ends of the horizontal pipe 112 through an adjustment mechanism, which can realize the angle adjustment of the sand flushing pipe 12 relative to the horizontal pipe 112. The two sand flushing pipes 12 correspond to the two sand discharge cones 9 respectively. The horizontal pipe 112 and the sand flushing pipe 12 are connected by a corrugated pipe 13. The two ends of the corrugated pipe 13 are connected to the horizontal pipe 112 and the sand flushing pipe 12 respectively by quick-connect coupling clamps 19, so as to realize the quick connection and disassembly of the corrugated pipe 13 to the horizontal pipe 112 and the sand flushing pipe 12. The corrugated pipe 13 is a metal corrugated pipe 13, which can be bent when the angle of the sand flushing pipe 12 relative to the horizontal pipe 112 is adjusted. The adjustment mechanism includes a first connecting seat 14, a second connecting seat 15, and a tilting actuator 16. One end of the first connecting seat 14 is fixedly connected to the horizontal pipe 112, and one end of the second connecting seat 15 is fixedly connected to the sand-flushing pipe 12. The other end of the first connecting seat 14 and the other end of the second connecting seat 15 are hinged to each other. A first hinge seat 17 is machined on the first connecting seat 14, and a second hinge seat 18 is machined on the second connecting seat 15. The fixed end of the tilting actuator 16 is hinged to the second hinge seat 18, and the extended end of the tilting actuator 16 is hinged to the first hinge seat 17. By extending and retracting the tilting actuator 16, the sand-flushing pipe 12 is driven to rotate around the hinge point of the first connecting seat 14 and the second connecting seat 15, thereby adjusting the angle of the sand-flushing pipe 12 relative to the horizontal pipe 112. A rack 32 is installed on the outer wall of the vertical tube 111. A through slot 35 is machined on the wall of the outer tube 10. The rack 32 is connected in the slot 35 and slides with the slot 35. A motor 33 is installed on the outer tube 10. A gear 34 is connected to the output shaft of the motor 33. The gear 34 meshes with the rack 32. The motor 33 drives the gear 34 to rotate. Through the meshing of the gear 34 and the rack 32, the vertical tube 111 moves up and down in the outer tube 10, adjusting the height of the horizontal tube 112 and the sand flushing tube 12 relative to the sand discharge cone 9. During use, the sand and gravel in the mixture settle into the sand discharge cone 9. When the sand content of the produced liquid suddenly increases, causing the liquid level fluctuation to exceed the design value by more than 30%, or when the bottom sand accumulation affects the separation effect and causes the oil-water interface to become unclear, or when the suspended solids content at the sewage outlet suddenly increases by more than 50%, sand discharge treatment is required. The bottom seal of the sand discharge cone 9 is opened, and the vertical pipe 111 is connected to the external water pipe to flush the sand discharge cone 9, flushing out the sand and gravel that have settled in the sand discharge cone 9. The end of the flushing pipe 12 can be equipped with a nozzle so that the flushing water is sprayed out in an umbrella shape. During the flushing process, the flip actuator 16 drives the flushing pipe 12 to adjust the angle relative to the horizontal pipe 112, and the motor 33 drives the gear 34 rack 32 to drive the T-shaped inner pipe 11 to rise and fall relative to the outer pipe 10, thereby ensuring that the sprayed flushing water can cover the entire area of ​​the sand discharge cone 9 to complete the flushing, expand the flushing range, avoid the flushing dead corners, enhance the breaking effect on cemented sand clumps, and improve the sand discharge efficiency.

[0024] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. All equivalent changes and modifications made in accordance with the scope of the claims of this utility model should fall within the technical scope of this utility model.

Claims

1. A novel oil-gas-water-sand separator for oilfield use, comprising a horizontal tank (1), wherein the tank (1) is internally provided with a packing assembly (2) and an oil outlet regulating assembly, the top of the tank (1) is provided with an inlet pipe (3), an exhaust pipe (4), a pressure interface (5) and a liquid level measuring interface (6), and the bottom of the tank (1) is provided with a water outlet (7), a sewage outlet (8) and two sand outlet cones (9), characterized in that, The tank body (1) is equipped with a concave end cap (27) and an inclined plate (28) corresponding to the liquid inlet pipe (3). The bottom of the tank body (1) is equipped with a sand discharge cleaning component. There are two sand discharge cleaning components, and the two sand discharge cleaning components are set one-to-one with the two sand discharge cones (9).

2. The novel oil-gas-water-sand separator for oilfields according to claim 1, characterized in that: The oil outlet regulating assembly includes an outer oil outlet cylinder (20), an inner oil outlet cylinder (21), and an oil outlet pipe (22). The inner oil outlet cylinder (21) is connected to the inner wall of the tank body (1) by a channel steel (23). An external thread (24) is provided on the outer wall of the inner oil outlet cylinder (21), and an internal thread (25) is provided on the inner wall of the outer oil outlet cylinder (20). The external thread (24) and the internal thread (25) are engaged. One end of the oil outlet pipe (22) is located at the bottom of the inner oil outlet cylinder (21), and the other end of the oil outlet pipe (22) extends to the outside of the tank body (1). Both the internal thread (25) and the external thread (24) are fine-pitch threads.

3. The novel oil-gas-water-sand separator for oilfields according to claim 1, characterized in that: The exhaust pipe (4) is equipped with a wire mesh demister (26).

4. The novel oil-gas-water-sand separator for oilfields according to claim 1, characterized in that: Multiple sampling tubes (29) are provided on one side of the tank (1), and manholes (30) are provided on the top of the tank (1) and the other side of the tank (1).

5. The novel oil-gas-water-sand separator for oilfields according to claim 1, characterized in that: The tank (1) is provided with saddles (31) at both ends of the bottom.

6. The novel oil-gas-water-sand separator for oilfields according to claim 1, characterized in that: The sand removal and cleaning assembly includes an outer sleeve (10), a T-shaped inner tube (11), and a sand flushing pipe (12). The outer sleeve (10) is located at the bottom of the outside of the tank body (1). The T-shaped inner tube (11) includes a vertical tube (111) and a horizontal tube (112). The vertical tube (111) is inserted into and slidably connected inside the outer sleeve (10). The horizontal tube (112) is located inside the tank body (1). The two sand flushing pipes (12) are connected to the two ends of the horizontal tube (112) through an adjustment mechanism. The two sand flushing pipes (12) correspond to the two sand discharge cones (9) respectively. A corrugated pipe (13) is connected between the horizontal tube (112) and the sand flushing pipe (12).

7. The novel oil-gas-water-sand separator for oilfields according to claim 6, characterized in that: The adjustment mechanism includes a first connecting seat (14), a second connecting seat (15), and a flipping actuator (16). One end of the first connecting seat (14) is fixed to the horizontal pipe (112), and one end of the second connecting seat (15) is fixed to the sand flushing pipe (12). The other end of the first connecting seat (14) is hinged to the other end of the second connecting seat (15). A first hinge seat (17) is provided on the first connecting seat (14), and a second hinge seat (18) is provided on the second connecting seat (15). The fixed end of the flipping actuator (16) is hinged to the second hinge seat (18), and the extended end of the flipping actuator (16) is hinged to the first hinge seat (17).

8. The novel oil-gas-water-sand separator for oilfields according to claim 6, characterized in that: A rack (32) is provided on the outer wall of the vertical tube (111), and a long groove (35) is provided on the wall of the outer tube (10). The rack (32) and the long groove (35) are slidably engaged. A motor (33) is provided on the outer tube (10), and a gear (34) is provided on the output shaft of the motor (33). The gear (34) meshes with the rack (32).

9. The novel oil-gas-water-sand separator for oilfields according to claim 6, characterized in that: Both ends of the corrugated pipe (13) are connected to the horizontal pipe (112) and the sand flushing pipe (12) respectively via quick-connect coupling clamps (19).

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