A downhole oil and gas sand separator

Abstract

The utility model relates to oil -gas separator technical field especially relates to a kind of downhole oil-gas sand separator. Including shell, the inside joint cover of shell is connected, the inside sliding connection of joint cover has press block, the outer wall fixed connection of press block has slide column, the outer wall of slide column is provided with first spring, the inside of shell is provided with sand settling tail pipe, the outer wall fixed connection of sand settling tail pipe has cyclone, the inside of cyclone is provided with tangential inlet, the outer wall fixed connection of cyclone has overflow pipe, the outer wall of overflow pipe is connected with fixed block, the outer wall fixed connection of fixed block has separation cylinder, the inside of shell is provided with mounting assembly. The utility model provides a kind of downhole oil-gas sand separator, by press block can drive slide column to slide in the inside of joint cover, first spring is driven to compress simultaneously, at this time, by driving joint cover to slide out the inside of shell reaches the effect of removing separator, to reach the effect of being convenient for installation to separator.

Description

Technical Field

[0001] This utility model relates to the field of oil and gas separator technology, and in particular to a downhole oil, gas and sand separator. Background Technology

[0002] Oil-gas-sand separation refers to the effective separation of the mixture of oil, gas, and sand produced during oil and gas well production to prevent sand particles and gas from damaging production equipment and processes. Downhole tools and equipment specifically designed to solve this problem are typically installed below the pump to achieve preliminary separation of oil, gas, and sand directly within the wellbore, preventing sand particles and gas from entering the pump. This requires the use of a downhole oil-gas-sand separator.

[0003] Patent document CN205516904U discloses a spiral accelerating oil-gas separator, which includes: an outer cylinder; an inner cylinder fitted inside the outer cylinder; a rotating shaft fitted inside the inner cylinder, capable of rotation, forming a first annular space between the inner cylinder and the rotating shaft; a middle cylinder fitted between the outer and inner cylinders, forming a second annular space between the middle and outer cylinders, the second annular space being connected to the first annular space via a connecting pipe; and drive blades, disposed on the rotating shaft and located below the inner cylinder, capable of rotating with the rotating shaft and driving the separated liquid into the second annular space. Because the drive blades can rotate at high speed with the rotating shaft, they can provide a high tangential velocity to the gas-liquid mixture to be separated, thereby achieving gas-liquid separation. This allows for gas-liquid separation through gravity, making it suitable for oil-gas separation in high gas-liquid ratio, high-production oil wells, and achieving good oil-gas separation results.

[0004] When using the above technology, the following technical problems were found in the existing technology: it is difficult to disassemble the separator, the installation of the separator is inconvenient, and it is not easy to clean the inside of the separator. Therefore, a downhole oil-gas-sand separator is designed to provide another technical solution to the above technical problems. Utility Model Content

[0005] Therefore, it is necessary to provide a downhole oil-gas-sand separator to address the above-mentioned technical problems, such as the difficulty in disassembling the separator, the inconvenience in installing the separator, and the difficulty in cleaning the inside of the separator.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A downhole oil-gas-sand separator includes a housing, an inner connecting cover, a sliding block, an outer wall of the block, and a fixed sliding column. The outer wall of the sliding column is slidably connected to the inner connecting cover. A first spring is provided on the outer wall of the sliding column, one end of which is fixedly connected to the outer wall of the block, and the other end is fixedly connected to the inner connecting cover. A sand settling pipe is provided inside the housing, and a hydrocyclone is fixedly connected to the outer wall of the sand settling pipe. A tangential inlet is provided inside the hydrocyclone, and an overflow pipe is fixedly connected to the outer wall of the hydrocyclone. A fixing block is attached to the outer wall of the overflow pipe, and a separation cylinder is fixedly connected to the outer wall of the fixing block. An installation assembly is provided inside the housing.

[0008] In a preferred embodiment of the downhole oil-gas-sand separator provided by this utility model, the installation assembly includes a fixing ring, the outer wall of which is fixedly connected to the inside of the outer shell, and a limiting post is fixedly connected to the outer wall of the fixing ring, the outer wall of which is snapped into the inside of the fixing block.

[0009] In a preferred embodiment of the downhole oil-gas-sand separator provided by this utility model, an oil sleeve ring is fixedly installed inside the separator cylinder, a bridge-type connecting cylinder is fixedly connected inside the separator cylinder, a crescent-shaped hole is provided inside the bridge-type connecting cylinder, and a suction hole is provided inside the bridge-type connecting cylinder.

[0010] In a preferred embodiment of the downhole oil-gas-sand separator provided by this utility model, a central pipe is fixedly connected to the outer wall of the bridge-type connecting cylinder, and an exhaust valve is fixedly connected to the outer wall of the central pipe.

[0011] In a preferred embodiment of the downhole oil-gas-sand separator provided by this utility model, the fixed block is internally fixedly connected to an installation block, and the installation block is internally slidably connected to a sliding block.

[0012] In a preferred embodiment of the downhole oil-gas-sand separator provided by this utility model, a connecting block is fixedly connected to the outer wall of the sliding block, the outer wall of the connecting block is slidably connected to the inside of the mounting block, a second spring is provided on the outer wall of the connecting block, one end of the second spring is fixedly connected to the inside of the mounting block, and the other end of the second spring is fixedly connected to the outer wall of the second spring.

[0013] In a preferred embodiment of the downhole oil-gas-sand separator provided by this utility model, a sliding column is fixedly connected to the outer wall of the sliding block, the outer wall of the sliding column is slidably connected to the inside of the fixed block, a rotating block is slidably connected to the inside of the sliding block, and the outer wall of the rotating block is rotatably connected to the inside of the mounting block.

[0014] In a preferred embodiment of the downhole oil-gas-sand separator provided by this utility model, a locking block is slidably connected to the outer wall of the rotating block, the outer wall of the locking block is locked inside the overflow pipe, and a third spring is provided on the outer wall of the locking block. One end of the third spring is fixedly connected to the outer wall of the sliding block, and the other end of the third spring is fixedly connected to the outer wall of the locking block.

[0015] It is clear without a doubt that the technical solution described above in this application can solve the technical problem that this application aims to address.

[0016] At the same time, through the above technical solutions, this utility model has at least the following beneficial effects:

[0017] This utility model provides a downhole oil-gas-sand separator. By pressing the button, the sliding column can be moved inside the connecting cover, and at the same time, the first spring is compressed. At this time, the connecting cover is moved out of the outer shell, which achieves the effect of disassembling the separator, so as to facilitate the installation of the separator.

[0018] By pressing the sliding block, the connecting block can slide inside the mounting block, which in turn drives the rotating block to rotate. At the same time, the cooperation of the second spring can drive the locking block to lock the overflow pipe, thereby achieving the effect of disassembling the separator body, so as to clean the internal structure of the separator and extend the service life of the equipment. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the internal structure of the outer shell of this utility model;

[0022] Figure 3 This is a schematic diagram of the internal structure of the block of this utility model;

[0023] Figure 4 This is a schematic diagram of the internal structure of the fixing ring of this utility model;

[0024] Figure 5 This is a schematic diagram of the internal structure of the central tube of this utility model;

[0025] Figure 6 This is a schematic diagram of the internal structure of the hydrocyclone of this utility model;

[0026] Figure 7 This is a schematic diagram of the internal structure of the bridge-type connecting cylinder of this utility model;

[0027] Figure 8 This is a schematic diagram of the internal structure of the exhaust valve of this utility model;

[0028] Figure 9 This is a schematic diagram of the internal structure of the fixing block of this utility model;

[0029] Figure 10 This is a schematic diagram of the internal structure of the sliding block of this utility model.

[0030] In the diagram: 1. Outer shell; 2. Connecting cover; 3. Press block; 4. Sliding column; 5. First spring; 6. Sand settling tailpipe; 7. Cyclone separator; 8. Fixing block; 9. Tangential inlet; 10. Mounting assembly; 1001. Fixing ring; 1002. Limiting column; 11. Separating cylinder; 12. Bridge-type connecting cylinder; 13. Crescent-shaped hole; 14. Suction hole; 15. Central tube; 16. Oil sleeve ring; 17. Exhaust valve; 18. Mounting block; 19. Sliding block; 20. Connecting block; 21. Second spring; 22. Sliding column; 23. Rotating block; 24. Locking block; 25. Third spring; 26. Overflow pipe. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0032] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0033] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0034] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0035] Reference Figure 1 - Figure 10A downhole oil-gas-sand separator includes a housing 1, a connecting cover 2 snapped into the inside of the housing 1, a push block 3 slidably connected to the inside of the connecting cover 2, the outer wall of the push block 3 snapped into the inside of the housing 1, a sliding column 4 fixedly connected to the outer wall of the push block 3, the sliding column 4 serving as a limiter, the outer wall of the sliding column 4 slidably connected to the inside of the connecting cover 2, a first spring 5 provided on the outer wall of the sliding column 4, one end of the first spring 5 fixedly connected to the outer wall of the push block 3, the other end of the first spring 5 fixedly connected to the inside of the connecting cover 2, the first spring 5 serving as a rebounder, a sand settling pipe 6 provided inside the housing 1, a hydrocyclone 7 fixedly connected to the outer wall of the sand settling pipe 6, a tangential inlet 9 provided inside the hydrocyclone 7, an overflow pipe 26 fixedly connected to the outer wall of the hydrocyclone 7, a fixing block 8 snapped into the outer wall of the overflow pipe 26, a separator cylinder 11 fixedly connected to the outer wall of the fixing block 8, and an installation assembly 10 provided inside the housing 1.

[0036] In this embodiment, the outer wall of the connecting cover 2 is provided with multiple key positions, which can be sealed and connected with key positions of the driver or other devices.

[0037] The usage process of the downhole oil-gas-sand separator provided by this utility model is as follows: When using the separator, first install the separator with the outer shell 1. By passing the entire separator through the outer shell 1, pressing the push block 3 will drive the sliding column 4 to slide inside the connecting cover 2, simultaneously compressing the first spring 5. At this time, the connecting cover 2 will slide into the outer shell 1. Then, the rebound action of the first spring 5 will drive the push block 3 to engage inside the outer shell 1, achieving the effect of quick installation of the connecting cover 2. The separator is installed at both ends of the outer shell 1. The connecting cover 2 is used to seal the separator. When the separator is needed, the pressure difference generated by the oil pump draws the solid-liquid-gas three-phase mixture into the tangential inlet 9 of the hydrocyclone 7. The resulting high-speed swirling flow, under the action of centrifugal force, causes the denser oil sand to accumulate on the pipe wall and move downward along the pipe wall into the sand settling tail pipe 6. The less dense liquid and gas phases are concentrated in the middle of the hydrocyclone 7 and enter the separator through the overflow pipe 26 connected to the hydrocyclone 7, and then enter the separation cylinder 11 to complete the separation of the solid, liquid and gas phases.

[0038] Reference Figure 4 - Figure 5 The mounting assembly 10 includes a retaining ring 1001, the outer wall of which is fixedly connected to the inside of the housing 1, and a limiting post 1002 is fixedly connected to the outer wall of the retaining ring 1001. The outer wall of the limiting post 1002 is snapped into the inside of the retaining block 8.

[0039] The following is the usage process of the downhole oil-gas-sand separator provided by this utility model: When installing the separator, a fixing ring 1001 is set inside the outer shell 1. The fixing ring 1001 can be used to fix the fixing block 8 in the center of the separator. A groove is opened inside the fixing block 8 to limit the positioning post 1002. When the separator is driven into the outer shell 1, the fixing block 8 can slide on the outer wall of the positioning post 1002 to achieve the limiting effect, thereby strengthening the installation of the separator.

[0040] Reference Figure 5 - Figure 8 An oil sleeve ring 16 is fixedly installed inside the separator cylinder 11. A bridge-type connecting cylinder 12 is fixedly connected inside the separator cylinder 11. A crescent hole 13 is provided inside the bridge-type connecting cylinder 12. An intake hole 14 is provided inside the bridge-type connecting cylinder 12. A central pipe 15 is fixedly connected to the outer wall of the bridge-type connecting cylinder 12. An exhaust valve 17 is fixedly connected to the outer wall of the central pipe 15.

[0041] The operation process of the downhole oil-gas-sand separator provided by this utility model is as follows: The liquid phase and the gas phase first enter the crescent hole 13 of the bridge-type connecting cylinder 12 from the lower tail pipe of the separator. Then, through the spiral motion of the separation cylinder 11, due to the centrifugal force, the less dense liquid gathers along the inner side of the spiral and is discharged from the upper joint to the casing annulus through the exhaust valve 17, while the denser liquid flows upward from the outer side of the spiral and is thrown out into the oil casing annulus 16 when passing through the perforated end. During the downstroke, the liquid flow velocity in the casing annulus space becomes zero, and the smaller bubbles rise to the oil casing annulus space. This makes full use of the liquid flow backflow effect. The separated liquid enters the central pipe 15 from the suction hole 14 of the bridge-type connecting cylinder 12, completing one working process.

[0042] Reference Figure 9 - Figure 10 The fixed block 8 is internally fixedly connected to the mounting block 18, and the mounting block 18 is internally slidably connected to the sliding block 19. The outer wall of the sliding block 19 is fixedly connected to the connecting block 20, which is slidably connected to the inside of the mounting block 18. The outer wall of the connecting block 20 is provided with a second spring 21, one end of which is fixedly connected to the inside of the mounting block 18, and the other end of which is fixedly connected to the outer wall of the second spring 21. The outer wall of the sliding block 19 is fixedly connected to the sliding column 22, which is slidably connected to the inside of the fixed block 8. The sliding block 19 is internally slidably connected to the rotating block 23, and the outer wall of the rotating block 23 is rotatably connected to the inside of the mounting block 18. The outer wall of the rotating block 23 is slidably connected to the locking block 24, which is locked inside the overflow pipe 26. The outer wall of the locking block 24 is provided with a third spring 25, one end of which is fixedly connected to the outer wall of the sliding block 19, and the other end of which is fixedly connected to the outer wall of the locking block 24.

[0043] In this embodiment, each structure has its own service life. In actual manufacturing and application, the corresponding structure made of different materials can be replaced according to the needs of use.

[0044] The following is the usage process of the downhole oil-gas-sand separator provided by this utility model: When the separator needs to be disassembled, pressing the sliding block 19 can drive the connecting block 20 to slide inside the mounting block 18. When the connecting block 20 slides, it can drive the second spring 21 to be compressed, and at the same time drive the sliding column 22 inside the fixed block 8. The sliding column 22 plays a limiting role. The sliding block 19 drives the rotating block 23 to rotate. When the rotating block 23 rotates inside the mounting block 18, it can drive the locking block 24 to slide inside the mounting block 18, and at the same time drive the third spring 25 to be compressed. At this time, the overflow pipe 26 can be slid out from inside the fixed block 8, achieving the effect of disassembling the separator for cleaning.

[0045] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the present utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A downhole oil-gas-sand separator, comprising a housing (1), characterized in that, The outer casing (1) is fitted with a connecting cover (2), and a push block (3) is slidably connected inside the connecting cover (2). The outer wall of the push block (3) is fitted inside the outer casing (1). A sliding column (4) is fixedly connected to the outer wall of the push block (3), and the outer wall of the sliding column (4) is slidably connected inside the connecting cover (2). A first spring (5) is provided on the outer wall of the sliding column (4). One end of the first spring (5) is fixedly connected to the outer wall of the push block (3), and the other end of the first spring (5) is fixed... Inside the connecting cover (2), a sand settling tail pipe (6) is provided inside the outer shell (1). A hydrocyclone (7) is fixedly connected to the outer wall of the sand settling tail pipe (6). A tangential inlet (9) is provided inside the hydrocyclone (7). An overflow pipe (26) is fixedly connected to the outer wall of the hydrocyclone (7). A fixing block (8) is snapped onto the outer wall of the overflow pipe (26). A separation cylinder (11) is fixedly connected to the outer wall of the fixing block (8). An installation assembly (10) is provided inside the outer shell (1).

2. The downhole oil-gas-sand separator according to claim 1, characterized in that, The mounting assembly (10) includes a retaining ring (1001), the outer wall of which is fixedly connected to the inside of the outer shell (1), and a limiting post (1002) is fixedly connected to the outer wall of the retaining ring (1001), the outer wall of which is engaged with the inside of the fixing block (8).

3. A downhole oil-gas-sand separator according to claim 1, characterized in that, An oil sleeve ring (16) is fixedly installed inside the separator (11), and a bridge-type connecting cylinder (12) is fixedly connected inside the separator (11). A crescent hole (13) is provided inside the bridge-type connecting cylinder (12), and a suction hole (14) is provided inside the bridge-type connecting cylinder (12).

4. A downhole oil-gas-sand separator according to claim 3, characterized in that, The outer wall of the bridge-type connecting cylinder (12) is fixedly connected to a central tube (15), and the outer wall of the central tube (15) is fixedly connected to an exhaust valve (17).

5. A downhole oil-gas-sand separator according to claim 1, characterized in that, The fixing block (8) is internally fixedly connected to the mounting block (18), and the mounting block (18) is internally slidably connected to the sliding block (19).

6. A downhole oil-gas-sand separator according to claim 5, characterized in that, The outer wall of the sliding block (19) is fixedly connected to the connecting block (20), and the outer wall of the connecting block (20) is slidably connected to the inside of the mounting block (18). The outer wall of the connecting block (20) is provided with a second spring (21), one end of the second spring (21) is fixedly connected to the inside of the mounting block (18), and the other end of the second spring (21) is fixedly connected to the outer wall of the second spring (21).

7. A downhole oil-gas-sand separator according to claim 5, characterized in that, The outer wall of the sliding block (19) is fixedly connected to a sliding column (22), the outer wall of the sliding column (22) is slidably connected to the inside of the fixed block (8), and the inside of the sliding block (19) is slidably connected to a rotating block (23), the outer wall of the rotating block (23) is rotatably connected to the inside of the mounting block (18).

8. A downhole oil-gas-sand separator according to claim 7, characterized in that, The outer wall of the rotating block (23) is slidably connected to a locking block (24), the outer wall of the locking block (24) is locked inside the overflow pipe (26), the outer wall of the locking block (24) is provided with a third spring (25), one end of the third spring (25) is fixedly connected to the outer wall of the sliding block (19), and the other end of the third spring (25) is fixedly connected to the outer wall of the locking block (24).

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