Sand washing waste oil recovery device for offshore oil platform
By designing a vertical sand-pulling tank and setting up an oil collecting tank inside it, the problems of limited design location and safety risks of sand-pulling equipment on the offshore oil platform are solved, and more efficient separation of waste oil and stronger wind resistance are achieved.
Patent Information
- Application Number
- CN202422029239.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-20
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-08-20
AI Technical Summary
The design of sand-pulling equipment for existing offshore oil platforms has problems of location restriction and safety risks in extreme weather.
A vertical sand-pulling tank is designed, placed under the bottom deck of the marine oil platform, located on the inside of the pile legs, and an oil collection tank is set up in the tank to achieve initial separation of waste oil.
It realizes sand flushing operations under the bottom deck, enhances the wind resistance and safety of the device, and improves the separation effect and quality of waste oil.
Smart Images
Figure CN223009894U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of offshore oil, in particular to a sand washing waste oil recovery device for an offshore oil platform. Background Art
[0002] When offshore oil platforms extract oil, during the production process of oil wells, due to reasons such as excessive production pressure difference and loose cementation of sandstone oil and gas reservoir rocks, formation sand flows into the wellbore. During the production process, this formation sand will settle at the bottom of containers such as production separators due to gravity. Over time, a part of the sediment will accumulate at the bottom of the container, which not only affects the oil, gas and water treatment effect, but also causes the growth of bacteria under the sediment, resulting in metal corrosion. Therefore, it is necessary to regularly conduct sand washing operations on the closed containers of the production system to discharge the sundries, sediment, colloid and other sediments at the bottom of the container, slow down the corrosion rate of the container, increase the effective space and improve the treatment effect.
[0003] In the past, during sand washing operations, generally these sands and impurities were flushed into a sand washing tank 300 located above the bottom deck 200. In the sand washing tank 300, waste oil and impurities were separated by gravity sedimentation, and then the waste oil was pumped back to the process by a centrifugal pump, thus completing the entire sand washing process. The old - fashioned sand washing tank 300 has the following drawbacks during the sand washing process:
[0004] 1. The design position of the old - fashioned sand washing tank 300 is usually above the bottom deck 200. The bottom deck 200 is below the middle deck 100. For some containers located on the bottom deck 200, such as closed drains, if there is a need for sand washing, it cannot be satisfied, and the usage conditions are limited.
[0005] 2. The old - fashioned sand washing tank 300 is designed as a horizontal container with a large stress area. Considering extreme typhoon weather, there is a safety risk. Content of the Utility Model
[0006] The technical problem to be solved by the utility model is to provide a sand washing waste oil recovery device for an offshore oil platform.
[0007] The technical solution adopted by the present utility model to solve its technical problems is: to construct a sand flushing waste oil recovery device for an offshore oil platform, including a vertical sand flushing tank. The vertical sand flushing tank is arranged under the bottom deck of the offshore oil platform and is located inside the pile leg of the offshore oil platform. An oil collecting tank is arranged inside the vertical sand flushing tank, and the bottom of the oil collecting tank is spaced from the inner bottom wall of the vertical sand flushing tank; the sand flushing waste oil recovery device further includes a sand flushing waste oil collecting pipeline, a first sand flushing waste oil recovery pipeline, and a second sand flushing waste oil recovery pipeline; one end of the sand flushing waste oil collecting pipeline extends into the vertical sand flushing tank and is arranged with the opening facing downwards; the first sand flushing waste oil recovery pipeline includes a first branch pipeline and a second branch pipeline connected in parallel. One end of the first branch pipeline extends into the vertical sand flushing tank and is located outside the oil collecting tank, and one end of the second branch pipeline extends into the oil collecting tank. One end of the second sand flushing waste oil recovery pipeline extends into the oil collecting tank.
[0008] In some embodiments, the vertical sand flushing tank is cylindrical.
[0009] In some embodiments, the oil collecting tank includes the bottom and a side portion connected to the bottom, and both the bottom and the side portion are connected to the inner side wall of the vertical sand flushing tank.
[0010] In some embodiments, the vertical sand flushing tank is made of stainless steel.
[0011] In some embodiments, the inner wall surface of the vertical sand flushing tank is provided with a glass flake paint coating.
[0012] In some embodiments, an inclined plate is arranged inside the vertical sand flushing tank, and the inclined plate is arranged close to the inner bottom wall of the vertical sand flushing tank.
[0013] In some embodiments, the inclined plate is a metal plate.
[0014] In some embodiments, the vertical sand flushing tank is further provided with a liquid level gauge.
[0015] In some embodiments, the vertical sand flushing tank is further provided with a pressure gauge.
[0016] Implementing the present utility model has the following beneficial effects: The overall design of the vertical sand flushing tank is under the bottom deck, which can not only enable the production storage tanks on the bottom deck to carry out sand flushing operations, but also serve as a waste liquid recovery container for the atmospheric pressure containers on the bottom deck, such as the drainage of filter cleaning and the drainage of the pig launcher and receiver of the subsea pipeline. The practicability is higher. In addition, the vertical sand flushing tank has strong wind resistance and high industrial safety and stability.
[0017] Furthermore, during the operation process, the waste oil with sand can be recycled into the vertical sand flushing tank, and the waste oil without sand can be recycled into the oil collecting tank. When the liquid level of the waste liquid and waste oil containing sand in the space of the vertical sand flushing tank that is part of the oil collecting tank exceeds the top of the oil collecting tank, the relatively clean waste oil that has undergone preliminary gravitational settlement flows into the clean oil collecting tank, and then the waste oil in the oil collecting tank is uniformly recycled into the production process, improving the separation effect and the quality of the waste oil. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts. In the drawings:
[0019] Figure 1 is a schematic structural diagram of a sand flushing tank in the related art;
[0020] Figure 2 is a schematic structural diagram of a sand flushing waste oil recovery device for an offshore oil platform in some embodiments of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0021] In order to have a clearer understanding of the technical features, objectives, and effects of the present invention, the specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientation or positional relationships indicated by "front", "rear", "upper", "lower", "left", "right", "longitudinal", "transverse", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail", etc. are based on the orientation or positional relationships shown in the drawings and are constructed and operated in a specific orientation, and are only for the convenience of describing the technical solution, rather than indicating that the device or element referred to must have a specific orientation, and therefore should not be construed as a limitation to the present invention.
[0022] It should also be noted that, unless otherwise clearly specified and defined, terms such as "installation", "connection", "linkage", "fixation", "setting", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. When a component is referred to as "on" or "under" another component, the component can be "directly" or "indirectly" located above the other component, or there may also be one or more intermediate components. The terms "first", "second", "third", etc. are only for the convenience of describing the technical solution of the present invention, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", "third", etc. can explicitly or implicitly include one or more of such features. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0023] In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present utility model. However, those skilled in the art should clearly understand that the present utility model can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details from interfering with the description of the present utility model.
[0024] Referring to Figure 2 , the present utility model shows a sand washing waste oil recovery device for an offshore oil platform, which includes a vertical sand washing tank 10. The vertical sand washing tank 10 is arranged under the bottom deck 200 of the offshore oil platform and the vertical sand washing tank 10 is located inside the pile leg of the offshore oil platform. The bottom deck 200 is located below the middle deck 100.
[0025] Preferably, the vertical sand washing tank 10 can be suspended under the bottom deck 200 of the offshore oil platform and the vertical sand washing tank 10 is located inside the pile leg of the offshore oil platform. Understandably, the overall design of the vertical sand washing tank 10 under the bottom deck 200 can not only enable the production storage tank on the bottom deck 200 to carry out sand washing operations, but also serve as a waste liquid recovery container for the atmospheric pressure container on the bottom deck 200, such as the drainage of filter cleaning and the drainage of the pig launcher and receiver of the subsea pipeline.
[0026] The vertical sand flushing tank 10 is provided with an oil collecting tank 11 which can be used to receive the waste oil after sedimentation of sand. The bottom 111 of the oil collecting tank 11 is spaced from the inner bottom wall of the vertical sand flushing tank 10. In some embodiments, the oil collecting tank 11 includes the bottom 111 and a side portion 112 connected to the bottom 111, and both the bottom 111 and the side portion 112 are connected to the inner side wall of the vertical sand flushing tank 10. By providing the oil collecting tank 11, during the operation, the waste oil with sand is recycled to the vertical sand flushing tank 10, and the sand-free waste oil is recycled to the oil collecting tank 11. When the liquid level of the waste liquid and waste oil containing sand in the space of the vertical sand flushing tank 10 where the oil collecting tank 11 is located exceeds the top end of the oil collecting tank 11, the relatively clean waste oil that has undergone preliminary gravity sedimentation in the upper part flows into the clean oil collecting tank 11, and then the waste oil in the oil collecting tank 11 is uniformly recycled to the production process, improving the separation effect and the quality of the waste oil.
[0027] The sand flushing waste oil recovery device further includes a sand flushing waste oil collecting pipeline 20, a first sand flushing waste oil recovery pipeline 30, and a second sand flushing waste oil recovery pipeline 40.
[0028] One end of the sand flushing waste oil collecting pipeline 20 extends into the vertical sand flushing tank 10 and is arranged with the opening facing downwards. One end of the sand flushing waste oil collecting pipeline 20 extends into the vertical sand flushing tank 10 and is located outside the oil collecting tank 11. The other end of the sand flushing waste oil collecting pipeline 20 can be used to connect the sand flushing waste oil from the middle deck 100 and / or the bottom deck 200.
[0029] The first sand flushing waste oil recovery pipeline 30 includes a first branch pipeline 31 and a second branch pipeline 32 connected in parallel. One end of the first branch pipeline 31 extends into the vertical sand flushing tank 10 and is located outside the oil collecting tank 11. One end of the second branch pipeline 32 extends into the oil collecting tank 11. The first sand flushing waste oil recovery pipeline 30 is used to connect to the diaphragm pump recovery system.
[0030] One end of the second sand flushing waste oil recovery pipeline 40 extends into the oil collecting tank 11, and the other end of the second sand flushing waste oil recovery pipeline 40 is used to connect to the centrifugal pump recovery system.
[0031] In some embodiments, the vertical sand flushing tank 10 is cylindrical. The vertical sand flushing tank 10 is designed to be a vertical cylinder and is installed inside the pile leg. When a typhoon comes, it can better reduce the stress area of the windward side, enabling the sand flushing waste oil recovery device for the offshore oil platform of the present application to have the ability to resist super typhoons and meet the typhoon protection requirements for once in a thousand years.
[0032] In some embodiments, the vertical sand flushing tank 10 is made of stainless steel. The inner wall surface of the vertical sand flushing tank 10 is provided with a glass flake paint coating. By adopting the glass flake paint coating inside the vertical sand flushing tank 10, the corrosion rate inside the vertical sand flushing tank 10 can be reduced, the later maintenance cost of the vertical sand flushing tank 10 can be reduced, and expenses can be saved.
[0033] In some embodiments, a diagonally inclined plate 12 is provided inside the vertical sand flushing tank 10, and the diagonally inclined plate 12 is arranged close to the inner bottom wall of the vertical sand flushing tank 10. Preferably, the slope of the diagonally inclined plate 12 is ∠1:5. By providing the diagonally inclined plate 12 inside the vertical sand flushing tank 10, the liquid inside the vertical sand flushing tank 10 can be gathered in the inclined direction of the diagonally inclined plate 12 (see Figure 2 ), so that the waste oil can be fully recovered by the pump.
[0034] In some embodiments, the diagonally inclined plate 12 is a metal plate. For example, the diagonally inclined plate 12 can be made of a stainless steel plate.
[0035] In some embodiments, the vertical sand flushing tank 10 is further provided with a liquid level gauge, which can be used to detect the amount of waste oil in the vertical sand flushing tank 10. The liquid level gauge can include, but is not limited to, an electromagnetic liquid level gauge and a float liquid level gauge. Of course, the liquid level gauge may not be provided, and no specific limitation is made here.
[0036] In some embodiments, the vertical sand flushing tank 10 is further provided with a pressure gauge, which can be used to measure the pressure condition of the vertical sand flushing tank 10. Of course, the pressure gauge may not be provided, and no specific limitation is made here.
[0037] It can be understood that the above embodiments only represent the preferred embodiments of the present utility model, and the description thereof is relatively specific and detailed. However, it should not be construed as a limitation to the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, the above technical features can be freely combined, and several deformations and improvements can also be made, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made to the scope of the claims of the present utility model shall fall within the scope covered by the claims of the present utility model.
Claims
1. A waste oil recovery device for sand washing on an offshore oil platform, characterized in that: The invention comprises a vertical sand scouring tank (10), wherein the vertical sand scouring tank (10) is arranged under the bottom deck (200) of an offshore oil platform and the vertical sand scouring tank (10) is located on the inner side of the pile leg of the offshore oil platform; an oil collecting tank (11) is arranged inside the vertical sand scouring tank (10); the bottom (111) of the oil collecting tank (11) is spaced apart from the inner bottom wall of the vertical sand scouring tank (10); the sand scouring waste oil recovery device further comprises a sand scouring waste oil collection pipe (20), a first sand scouring waste oil recovery pipe (30) and a second sand scouring waste oil recovery pipe (40) One end of the waste sand scouring oil collecting pipe (20) extends into the vertical scouring tank (10) and is opened downward; the first waste sand scouring oil recovery pipe (30) comprises a first branch pipe (31) and a second branch pipe (32) connected in parallel, one end of the first branch pipe (31) extends into the vertical scouring tank (10) and is located outside the oil collecting tank (11), one end of the second branch pipe (32) extends into the oil collecting tank (11), and one end of the second waste sand scouring oil recovery pipe (40) extends into the oil collecting tank (11).
2. The waste oil recovery device for sand washing on an offshore oil platform according to claim 1, characterized in that: The vertical sand flushing tank (10) is cylindrical.
3. The waste oil recovery device for sand washing on an offshore oil platform according to claim 1, characterized in that: The oil collecting tank (11) comprises the bottom (111) and a side portion (112) connected to the bottom (111), and the bottom (111) and the side portion (112) are both connected to the inner side wall of the vertical sand flushing tank (10).
4. The waste oil recovery device for sand washing on an offshore oil platform according to claim 1, characterized in that: The vertical sand washing tank (10) is made of stainless steel.
5. The waste oil recovery device for sand washing on an offshore oil platform according to claim 1, characterized in that: The inner wall surface of the vertical sand blasting tank (10) is provided with a glass flake paint coating.
6. The waste oil recovery device for sand washing on an offshore oil platform according to claim 1, characterized in that: An inclined plate (12) is provided in the vertical sand scouring tank (10), and the inclined plate (12) is arranged close to the inner bottom wall of the vertical sand scouring tank (10).
7. The waste oil recovery device for sand washing on an offshore oil platform according to claim 6, characterized in that: The inclined plate (12) is a metal plate.
8. The waste oil recovery device for sand washing on an offshore oil platform according to claim 1, characterized in that: The vertical sand flushing tank (10) is also provided with a liquid level gauge.
9. The waste oil recovery device for sand washing on an offshore oil platform according to claim 1, characterized in that: The vertical sand flushing tank (10) is also provided with a pressure gauge.