Collection device for small leaks of oil at the wellhead

Abstract

The application discloses a kind of collection equipment of small amount of leaked oil of oil production well mouth, the equipment includes mobile seat, and mobile seat upper portion is equipped with collection box, first processing box and second processing box, and second processing box inside is provided with separation component.Separation component includes annular sieve plate, rotating rod, spiral fan blade, movable plate, baffle and floating suction plate.The application makes different regions rotate in turn to contact discharge port for filtering by annular sieve plate rotation, and when sieve plate rotates, spiral fan blade is driven to rotate by transmission unit to scrape off adhered soil, so that filtering and cleaning are carried out synchronously;After soil enters first processing box, oil in soil is seeped out by baffle shaking, and floating suction plate with vacuum design self-adapts liquid level to collect upper layer pure oil.The application has strong linkage, and effectively solves the problems of filter screen blockage and low oil-soil separation efficiency.

Description

Technical Field

[0001] This invention relates to the field of oil extraction technology, and in particular to a device for collecting small amounts of leaked oil at the wellhead. Background Technology

[0002] Small-scale oil leakage at the wellhead is a common phenomenon in oil extraction. Its causes involve multiple factors, including equipment, processes, and the environment. The collection of leaked oil is driven by multiple requirements, including environmental protection, safety, resource recovery, and compliance. Production valves and dewaxing valves on the wellhead, due to frequent opening and closing or lack of maintenance, may experience issues such as valve seat wear and poor valve stem sealing, leading to leaks. Acidic gases such as hydrogen sulfide and carbon dioxide in crude oil can corrode wellhead metal components, forming corrosion perforations or cracks. If the formation pressure is higher than the wellhead pressure, crude oil may be forced to seep through tiny gaps. Conventional collection equipment uses fixed screens or filter plates. Leaked oil continuously flows through the same area, causing rapid soil accumulation and blockage. When processing high-viscosity crude oil, flat-plate filters may suffer from soil adhesion to the filter surface, forming a dense layer that hinders oil passage. Furthermore, the filtered soil may still contain some oil, affecting collection efficiency. Therefore, a collection device for small-scale oil leakage at the wellhead is proposed. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies, such as fixed screens or filter plates, where leaked oil continuously passes through the same area, causing rapid soil accumulation and blockage, and the filtered soil still containing some oil, thus affecting collection efficiency. The invention proposes a collection device for small amounts of leaked oil at oil wellheads.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a collection device for small-scale oil leakage at the wellhead, comprising a movable base, a collection box mounted on the upper part of the movable base, a first processing box mounted on the upper part of the movable base, a second processing box mounted on the upper part of the first processing box, a separation component disposed inside the second processing box, the separation component comprising an annular screen plate rotatably connected inside the second processing box, a rotating rod rotatably connected inside the second processing box, a first transmission unit disposed inside the second processing box, a spiral fan blade mounted on the outer side of the rotating rod, a movable plate movably connected inside the first processing box, and multiple baffles mounted on the upper part of the movable plate. The system comprises a plate, a second transmission unit installed inside the first processing tank, and a floating suction plate movably connected to the inside of the first processing tank. Multiple circular grooves are provided on the outer side of the baffle. The annular screen plate rotates, causing different parts of itself to alternately occupy the suction port inside the second processing tank. When the annular screen plate rotates, it drives the rotating rod and the spiral fan blades to rotate via the first transmission unit. When the spiral fan blades rotate, they scrape away the soil filtered from the inside of the annular screen plate and allow the soil to enter the first processing tank. The soil is blocked by the baffle, causing the oil within the soil to flow through the circular grooves to the bottom inside the first processing tank. When the rotating rod rotates, it drives the movable plate and the baffle to vibrate via the second transmission unit, ensuring the floating suction plate remains on the liquid surface.

[0005] Furthermore, a second drive pump is installed on the side of the collection tank, and a second delivery pipe is installed at the output end of the second drive pump. The end of the second delivery pipe away from the second drive pump is fixedly connected to the second treatment tank. The second drive pump draws the filtered oil through the second delivery pipe. Furthermore, a first delivery pipe is installed inside the second treatment tank, and a first drive pump is installed at the end of the first delivery pipe. The first drive pump draws the leaked oil through the first delivery pipe. Furthermore, a drive device is installed on the upper part of the second treatment tank. The drive device is connected to the annular screen plate via a transmission connection. After the drive device is started, it drives the annular screen plate to rotate. Furthermore, the first transmission unit includes a rubber ring installed inside the annular screen plate, a cylinder installed inside the second treatment tank, a rotating rod rotatably connected to the inside of the cylinder, and a rubber plate installed at the upper end of the rotating rod. The rubber plate rubs against the rubber ring, and the rubber ring rotates, driving the rubber plate to rotate through friction. Furthermore, a transmission groove is provided on the inner bottom of the second processing box, which connects the first and second processing boxes. When the spiral fan blades rotate, they contact the inner wall of the annular screen plate and guide the soil through the transmission groove to the inner side of the first processing box. Furthermore, the second transmission unit includes a pressure block mounted on the upper part of a movable plate. A cam is mounted on one end of the rotating rod near the movable plate. The pressure block has a trapezoidal cross-section, and its inclined surface lies on the trajectory of the cam. When the cam rotates, it continuously presses against the inclined surface of the pressure block. Furthermore, a support block is installed inside the first processing box, and multiple telescopic rods are mounted on the upper part of the support block. The ends of the multiple telescopic rods are fixedly connected to the movable plate. Furthermore, a first annular tube is installed on the inner top of the first processing tank, and a second annular tube is slidably arranged on the outer side of the first annular tube. The floating suction plate is installed at the end of the second annular tube, and a third conveying pipe is installed on the outer side of the second conveying pipe. The end of the third conveying pipe away from the second conveying pipe is fixedly connected to the first annular tube. When the second drive pump pumps, it draws the separated oil from the inside of the first processing tank through the third conveying pipe, the first annular tube, the second annular tube, and the floating suction plate. Furthermore, the interior of the floating suction plate is a vacuum.

[0006] The present invention has the following beneficial effects: 1. The present invention drives the annular screen plate to rotate through a driving device, so that different areas take turns contacting the outlet of the first conveying pipe for filtration. When the screen plate rotates, the spiral fan blades rotate to scrape off the soil attached to the inner side of the screen plate and push the soil into the first treatment box, so as to achieve simultaneous filtration and cleaning. 2. In this invention, after the soil falls into the first treatment tank, the residual oil in the soil seeps out through the circular groove by the shielding effect of the inclined movable plate and the baffle, thus achieving preliminary oil-soil separation. After the oil enters the bottom of the first treatment tank, the soil impurities settle, and the floating suction plate automatically floats on the liquid surface due to the vacuum design and adapts to changes in the liquid surface, which can collect the pure oil on the upper layer after oil-soil separation. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the overall structure of a collection device for small amounts of leaked oil at the wellhead, as proposed in this invention. Figure 2 This is a schematic diagram of the overall side cross-sectional structure of the present invention; Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point A in the middle; Figure 4 for Figure 2 Enlarged schematic diagram of the structure at point B; Figure 5 for Figure 2 Enlarged schematic diagram of the structure at point C; Figure 6 for Figure 2 Enlarged schematic diagram of the structure at point D; Figure 7 for Figure 2 Enlarged schematic diagram of the structure at point E in the middle; In the diagram: 1. Movable seat; 2. Collection box; 3. First processing box; 4. Second processing box; 5. First drive pump; 6. First conveying pipe; 7. Second drive pump; 8. Second conveying pipe; 9. Annular screen plate; 10. Rubber ring; 11. Rubber plate; 12. Rotating rod; 13. Cylinder; 14. Spiral fan blade; 15. Transmission trough; 16. First annular pipe; 17. Second annular pipe; 18. Floating suction plate; 19. Third conveying pipe; 20. Cam; 21. Pressure block; 22. Support block; 23. Telescopic rod; 24. Movable plate; 25. Baffle; 26. Circular trough; 27. Drive device. Detailed Implementation

[0008] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. 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.

[0009] Example 1: Overall Structure and Primary Filtration Separation System like Figures 1-7As shown, this embodiment provides a collection device for small-scale oil leakage at the wellhead, mainly including a mobile base 1 and a collection box 2, a first processing box 3, and a second processing box 4 arranged from bottom to top or in logical order on the mobile base 1. The mobile base 1 provides mobility for the entire device, facilitating its transfer between different leakage points at the wellhead. The collection box 2 is used to store the finally collected pure oil; the second processing box 4 is used to perform primary solid-liquid separation (i.e., filtering out solid impurities such as soil) on the pumped-in leaking oil; the first processing box 3 is used to perform secondary oil-soil separation on the soil containing residual oil.

[0010] A separation assembly is located inside the second processing chamber 4, integrating filtration, self-cleaning, and power transmission functions. Specifically, an annular screen plate 9 is rotatably connected to the inside of the second processing chamber 4. The annular screen plate 9 is circular in shape and has sieve holes inside for fluid and impurities to pass through. A drive device 27 (such as a servo motor or a geared motor) is installed on the upper part of the second processing chamber 4. The output shaft of the drive device 27 is connected to the annular screen plate 9 via gears, belts, or direct coaxial connection. When the drive device 27 is started, it drives the annular screen plate 9 to rotate inside the second processing chamber 4.

[0011] To facilitate the extraction of leaked oil, a first delivery pipe 6 is installed inside the second treatment tank 4, and a first drive pump 5 is installed at the end of the first delivery pipe 6. The first drive pump 5 is connected to the leak point at the wellhead via a pipeline, generating negative pressure to draw in the leaked oil mixed with soil, and then discharges it into the second treatment tank 4 through the first delivery pipe 6. Because the annular screen plate 9 is rotating, the discharged oil impacts different areas of the annular screen plate 9, causing different parts of the annular screen plate 9 to take turns performing filtration at the suction port, thus avoiding the problem of blockage caused by rapid local soil accumulation in fixed filter screens.

[0012] The separation assembly also includes a rotating rod 12 rotatably connected within the second processing chamber 4, a spiral fan blade 14 located outside the rotating rod 12, and a first transmission mechanism connecting the annular screen plate 9 and the rotating rod 12. The first transmission mechanism uses the rotational power of the annular screen plate 9 to drive the rotating rod 12. Specifically, a rubber ring 10 is installed on the inner side of the annular screen plate 9, a cylinder 13 is fixed to the inner side of the second processing chamber 4, the rotating rod 12 is rotatably connected to the inner side of the cylinder 13, and a rubber plate 11 is installed at the upper end of the rotating rod 12. The rubber plate 11 is in frictional contact with the inner surface of the rubber ring 10. When the annular screen plate 9 rotates, it drives the rubber ring 10 to rotate synchronously, and the rubber ring 10 drives the rubber plate 11 and the rotating rod 12 to rotate within the cylinder 13 through friction.

[0013] When the rotating rod 12 rotates, it drives the spiral fan blades 14 mounted on its outer side to rotate. The spiral fan blades 14 are located inside the annular screen plate 9, and the edges of their blades are preferably in contact with the inner wall of the annular screen plate 9. The rotating spiral fan blades 14 have two functions: first, to scrape off the soil adhering to the inner wall of the annular screen plate 9 to prevent the screen holes from being blocked; second, to use the downward thrust of the spiral to push the scraped soil downward. A transmission trough 15 is provided at the bottom inner side of the second treatment box 4, which connects the first treatment box 3 and the second treatment box 4. The soil pushed by the spiral fan blades 14 enters the first treatment box 3 through the transmission trough 15, thereby realizing the simultaneous filtration and cleaning.

[0014] To extract the filtered oil, a second drive pump 7 is installed on the side of the collection tank 2. A second delivery pipe 8 is installed at the output end of the second drive pump 7, and the end of the second delivery pipe 8 away from the second drive pump 7 is connected to the interior of the second processing tank 4. The second drive pump 7 generates negative pressure, which draws the oil filtered by the annular screen plate 9 from the second processing tank 4 and discharges it into the collection tank 2.

[0015] Example 2: Secondary oil-soil separation and pure oil collection system like Figure 1 - Figure 7 As shown, based on Embodiment 1, this embodiment focuses on a detailed description of the structure inside the first processing tank 3. The soil falling from the second processing tank 4 into the first processing tank 3 still contains some oil. To improve collection efficiency, a secondary separation structure is installed inside the first processing tank 3.

[0016] A movable plate 24 is movably connected to the inner side of the first treatment box 3. The movable plate 24 is inclined, allowing soil falling onto its surface to slide down under gravity. Multiple baffles 25 are fixedly installed on the upper part of the movable plate 24, perpendicular to its surface, to prevent rapid soil slippage and prolong the soil's residence time on the movable plate 24. Multiple circular grooves 26 are formed on the outer side of the baffles 25 (i.e., the side facing away from the movable plate 24). When soil is intercepted by the baffles 25, residual oil inside the soil gradually seeps out under gravity and flows out through the circular grooves 26, dripping to the bottom inner side of the first treatment box 3.

[0017] To further facilitate the separation of oil from the soil, the separation assembly also includes a second transmission mechanism. This mechanism utilizes the rotational power of the rotating rod 12 to drive the movable plate 24 to vibrate. Specifically, a pressure block 21 is mounted on the upper part of the movable plate 24, and a cam 20 is mounted on one end of the rotating rod 12 near the movable plate 24. The pressure block 21 has a trapezoidal cross-section with an inclined surface that lies on the trajectory of the cam 20. When the rotating rod 12 rotates, it drives the cam 20 to rotate, and the protruding portion of the cam 20 periodically presses against the inclined surface of the pressure block 21, forcing the movable plate 24 to move downwards.

[0018] To achieve the reset of the movable plate 24, a support block 22 is installed inside the first processing box 3, and multiple telescopic rods 23 (preferably elastic telescopic rods with internal reset springs) are installed on the upper part of the support block 22. The ends of the multiple telescopic rods 23 are fixedly connected to the bottom of the movable plate 24. When the protruding part of the cam 20 disengages from the pressure block 21, the telescopic rods 23 extend under the action of the spring, pushing the movable plate 24 to reset upward. As the cam 20 rotates continuously, the movable plate 24 moves up and down repeatedly, thereby generating high-frequency vibration. This vibration causes the soil blocked by the baffle 25 to loosen and flow slowly, greatly facilitating the outflow of oil inside the soil through the circular groove 26.

[0019] After the oil enters the bottom of the first processing tank 3, it rises to the top due to density differences, while soil impurities settle at the bottom. To collect the upper layer of pure oil, the separation assembly also includes a floating suction plate 18 movably connected to the inside of the first processing tank 3. The interior of the floating suction plate 18 is hollow or has a vacuum structure, enabling it to generate sufficient buoyancy to always float on the surface of the oil.

[0020] A first annular pipe 16 is installed on the top inner side of the first processing tank 3. A second annular pipe 17 is slidably sleeved on the outer side of the first annular pipe 16, and a floating suction plate 18 is installed at the end of the second annular pipe 17. This sliding structure allows the floating suction plate 18 to remain horizontally stable as it rises and falls with the liquid level. A third conveying pipe 19 is installed on the outer side of the aforementioned second conveying pipe 8, and the end of the third conveying pipe 19 away from the second conveying pipe 8 is fixedly connected to the first annular pipe 16. When the second drive pump 7 starts and generates negative pressure, the negative pressure is transmitted sequentially through the second conveying pipe 8, the third conveying pipe 19, the first annular pipe 16, and the second annular pipe 17 to the floating suction plate 18. The floating suction plate 18 is in close contact with the liquid surface, directly sucking away the upper layer of pure petroleum separated inside the first processing tank 3, and finally flowing into the collection tank 2.

[0021] The working principle of this invention is as follows: When the equipment is in operation, it is moved to the leak point. The first drive pump 5, the second drive pump 7, and the drive device 27 are started. The first drive pump 5 pumps the soil-containing petroleum into the second treatment tank 4, and the drive device 27 drives the annular screen plate 9 to rotate for dynamic filtration; at the same time, the annular screen plate 9 drives the rotating rod 12 and the spiral fan blade 14 to rotate through friction transmission, scraping off and conveying the soil downward to the first treatment tank 3. The second drive pump 7 pumps the filtered petroleum from the second treatment tank 4 to the collection tank 2. After the soil enters the first treatment tank 3, it falls onto the movable plate 24. The rotating rod 12 simultaneously drives the movable plate 24 to vibrate through the cam mechanism, causing the petroleum in the soil to seep out to the bottom through the circular groove 26 under the action of vibration and gravity. The floating suction plate 18 automatically floats on the surface of the separated pure oil according to the buoyancy of the bottom layer. Under the negative pressure suction of the second drive pump 7, the pure petroleum is drawn away and collected, completing the entire treatment process.

[0022] It should be noted that the above description of the technical solutions is exemplary, and this specification may be embodied in different forms and should not be construed as limiting it to the technical solutions set forth herein. Rather, providing these descriptions will ensure that the disclosure of this invention is thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Furthermore, the technical solutions of this invention are defined only by the scope of the claims.

[0023] Finally, it should be noted that the above embodiments are merely representative examples of the present invention. Obviously, the present invention is not limited to the above embodiments and many variations are possible. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention should be considered within the protection scope of the present invention.

Claims

1. A collection device for small amounts of leaked oil at the wellhead, comprising a movable base (1), characterized in that, The upper part of the movable seat (1) is provided with a collection box (2) and a first processing box (3). The upper part of the first processing box (3) is provided with a second processing box (4). The inner side of the second processing box (4) is provided with a separation component. The separation component includes an annular screen plate (9) rotatably disposed in the second processing box (4), a rotating rod (12) rotatably disposed in the second processing box (4) and the first processing box (3), a first transmission mechanism disposed in the second processing box (4), a spiral fan blade (14) disposed outside the rotating rod (12), and a movable plate (9) movably disposed in the first processing box (3). 24) Multiple baffles (25) on the movable plate (24), a second transmission mechanism in the first processing box (3) and a floating suction plate (18) movable in the first processing box (3); the first transmission mechanism drives the annular screen plate (9) and the rotating rod (12); the spiral fan blade (14) is located inside the annular screen plate (9); the second processing box (4) is connected to the first processing box (3); the second transmission mechanism drives the rotating rod (12) and the movable plate (24); multiple circular grooves (26) are opened on the baffle (25).

2. The oil wellhead leakage collection device according to claim 1, characterized in that: The side of the collection box (2) is provided with a second drive pump (7), and the output end of the second drive pump (7) is provided with a second delivery pipe (8). The end of the second delivery pipe (8) away from the second drive pump (7) is connected to the second processing box (4).

3. The oil wellhead leakage collection device according to claim 1, characterized in that: The inner side of the second processing box (4) is provided with a first conveying pipe (6), and the end of the first conveying pipe (6) is provided with a first drive pump (5).

4. The oil wellhead leakage collection device according to claim 1, characterized in that: The upper part of the second processing box (4) is provided with a drive device (27), and the output shaft of the drive device (27) is connected to the annular screen plate (9) for transmission.

5. The oil wellhead leakage collection device according to claim 1, characterized in that: The first transmission mechanism includes a rubber ring (10) located inside the annular screen plate (9), a cylinder (13) located inside the second processing box (4), and a rubber plate (11) located at the upper end of the rotating rod (12); the rotating rod (12) is rotatably located inside the cylinder (13), and the rubber plate (11) and the rubber ring (10) are in frictional contact.

6. The oil wellhead leakage collection device according to claim 5, characterized in that: The inner bottom of the second processing box (4) is provided with a transmission groove (15), which connects the first processing box (3) and the second processing box (4); the edge of the spiral fan blade (14) is in contact with the inner wall of the annular screen plate (9).

7. The oil wellhead leakage collection device according to claim 1, characterized in that: The second transmission mechanism includes a pressure block (21) located on the upper part of the movable plate (24) and a cam (20) located at one end of the rotating rod (12); the pressure block (21) has an inclined surface located on the rotational trajectory of the cam (20).

8. The oil wellhead leakage collection device according to claim 1, characterized in that: The inner side of the first processing box (3) is provided with a support block (22), and the upper part of the support block (22) is provided with multiple telescopic rods (23), the ends of the multiple telescopic rods (23) are fixedly connected to the movable plate (24).

9. The oil wellhead leakage collection device according to claim 1, characterized in that: The inner top of the first processing box (3) is provided with a first annular tube (16), and a second annular tube (17) is slidably provided on the outer side of the first annular tube (16). A floating suction plate (18) is provided at the end of the second annular tube (17). A third conveying tube (19) is provided on the outer side of the second conveying tube (8), and one end of the third conveying tube (19) is connected to the first annular tube (16).

10. The oil wellhead leakage collection device according to claim 1, characterized in that: The interior of the floating suction plate (18) is a hollow structure.

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