Gas field water oil floating efficient collection equipment and using method

Abstract

The application discloses a kind of gas field water floating oil efficient collection equipment and use method, it is related to shale gas exploitation technical field, including support frame and fixed on it oil absorption roller, oil storage component, float assembly and drive assembly, the oil absorption roller end is provided with roller chain, the oil absorption roller side is provided with oil scraping groove, oil scraping groove is fixed on support frame, is connected with oil storage component by oil return pipe, drive assembly includes hydraulic drive wheel and drive submersible pump, hydraulic drive wheel is coaxially installed with driving sprocket, driving sprocket is engaged with the roller chain of oil absorption roller, drive submersible pump is connected with pump water pipe, drive submersible pump pumps out high pressure flowback fluid to drive hydraulic drive wheel to rotate, driving sprocket rotates simultaneously, equipment moves and makes the rotation of oil absorption roller is driven.The equipment is used, when gas field water floating oil is cleaned and collected, can save the artificial cost of floating oil recovery, and improve the efficiency of floating oil collection, reduce energy consumption, play an important role for enterprise cost reduction and efficiency increase.

Description

Technical Field

[0001] This invention relates to the field of shale gas extraction technology, and more specifically to a high-efficiency water-float oil collection device and its usage method in gas fields. Background Technology

[0002] Currently, my country mainly uses fracturing technology to extract shale gas. During the production stage after drilling and fracturing, a large amount of shale gas flowback fluid is generated. To conserve energy and resources and control environmental pollution, the generated shale gas flowback fluid is transferred to flowback fluid storage tanks for storage and reuse as fracturing fluid on the next drilling platform. Due to certain process requirements, the flowback fluid is always rich in various oils, hydrocarbons, and other impurities. These substances generally have a lower density than water, forming "oil slicks" on the surface. If these "oil slicks" remain on the surface of the tank for a long time, it will cause many problems: the working environment and surrounding environment of the flowback fluid storage station will have a particularly strong odor, seriously threatening the health of workers and villagers; the environmental protection risks for enterprises will be significant; at the same time, the current domestic shale gas flowback fluid "oil slick" removal technology is outdated, requiring large amounts of manpower, resulting in high processing costs and significant work safety risks.

[0003] Chinese patent document CN219907124U, published on October 27, 2023, discloses an oil spill extraction device, including a controller, an oil spill detection element, a suction pump, a delivery pipe, an oil suction cylinder, an isolation element, and a suspension frame for placement in a wastewater tank. The isolation element is fixed on the suspension frame, and the oil suction cylinder is fixed in the isolation element via the suspension frame. One end of the delivery pipe is connected to the oil suction cylinder, and the other end is connected to the suction pump. The oil spill detection element is placed in the wastewater tank to detect the oil thickness. The controller is connected to both the suction pump and the oil spill detection element, and controls the start and stop of the suction pump based on the detection results of the oil spill detection element. This device can automatically extract oil spills, making wastewater reinjection safer and more efficient, and solving the problems of high safety risks, low operational efficiency, and untimely recovery associated with existing manual salvage methods.

[0004] However, the aforementioned device has limitations in terms of the length of its oil suction pipe. The pipe cannot be too long, otherwise the resistance will be too high and the suction insufficient. Additionally, the onshore suction pump is relatively fixed, with a very limited range of movement. Therefore, this type of device is only suitable for small-area wastewater ponds with thick and concentrated oil slicks, and not for cleaning oil slicks from ultra-large shale gas runoff reservoirs. Furthermore, this type of equipment directly pumps wastewater ashore, resulting in an oil slick composition that is high in water and low in oil, requiring secondary separation. Overall, the efficiency is relatively low. Additionally, the oil pump and other equipment consume significant amounts of electricity, leading to high and ongoing costs for mechanical maintenance, material consumption, operators, and repair personnel. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention proposes a high-efficiency oil-floating collection device and method for gas fields. By using this device, the labor costs for oil-floating recovery can be saved, the efficiency of oil-floating collection can be improved, and energy consumption can be reduced, thus playing an important role in reducing costs and increasing efficiency for enterprises.

[0006] This invention is achieved using the following technical solution:

[0007] A high-efficiency oil flotation collection device for gas fields includes an oil suction drum, a support frame, an oil storage assembly, a float assembly, and a drive assembly. The oil storage assembly is fixed to one end of the support frame. The oil suction drum has a drum chain at its end and a through shaft at its axis. Bearing assemblies are installed at both ends of the through shaft and fixed to the support frame with bolts. An oil skimming groove is provided on the side of the oil suction drum near the oil storage tank. The oil skimming groove is fixed to the support frame with bolts. A through hole is provided on the oil skimming groove, and the through hole is connected to the oil storage assembly through a return oil pipe. The float assembly... The drive assembly, located between the oil suction drum and the oil storage component and fixedly connected to the support frame, includes a hydraulic drive wheel and a submersible pump. The hydraulic drive wheel and the submersible pump are fixed on the support frame. A drive sprocket is coaxially mounted on the hydraulic drive wheel, and the drive sprocket meshes with the drum chain of the oil suction drum. The drive submersible pump is connected to a pump water pipe, which is inserted into the interior of the hydraulic drive wheel. The drive submersible pump pumps out high-pressure return fluid, which drives the hydraulic drive wheel to rotate. At the same time, the drive sprocket rotates at the same speed, moving the equipment and causing the oil suction drum to rotate.

[0008] The surface of the oil-absorbing roller is provided with elastic oil-absorbing brushes.

[0009] The support frame includes an upper support frame and a lower support frame. The upper and lower support frames are welded together as one unit by four supporting steel structures. The oil suction roller, oil storage component, and float component are installed on the upper support frame, and the driving submersible pump is installed on the lower support frame.

[0010] The hydraulic drive wheel comprises two sets, symmetrically arranged on the supporting steel structures at both ends near the oil suction drum.

[0011] The oil storage assembly includes two oil storage tanks, the bottoms of which are connected by a curved connecting pipe.

[0012] The oil storage tank is connected to a recovery oil pipe, and a self-starting submersible pump is installed at one end of the recovery oil pipe that extends into the oil storage tank.

[0013] The through shaft is also provided with grooved wheels at both ends, and oil recovery hoses are provided on the grooved wheels. The oil recovery hoses are connected to the grooved wheels at both ends, forming an oil collection ring with the oil suction roller on the water surface.

[0014] The return oil pipe is at a 30° angle to the horizontal plane and connects to the oil scraper groove through hole and the oil storage assembly.

[0015] The upper support frame is equipped with lifting rings.

[0016] A method for using a gas field water-float oil collection device involves adjusting the length of the oil recovery hose to the length of the area to be cleaned before the device is put into the flowback fluid storage tank. Then, the device is hoisted and placed onto the flowback fluid storage tank. After the oil recovery hose surrounds the water surface of the flowback fluid storage tank to form an oil production space, the submersible pump is driven to start working and begin the oil cleaning operation.

[0017] Compared with the prior art, the advantages of the present invention are as follows:

[0018] 1. This invention enables automatic oil slick removal, requiring only one person to complete the entire removal process. No on-site monitoring or management of the pool is needed during the removal process, achieving automatic removal and saving significant labor costs.

[0019] 2. In this invention, the oil suction roller is equipped with an elastic oil suction brush. When the brush passes through the oil scraping groove, it is scraped down and sinks into the oil scraping groove for buffering. It then flows into the waste oil storage tank through the return oil pipe. The oil-water separation process is completed in the water pool. The sludge liquid that is cleaned up is mainly composed of oil, while the water content is very low. This allows for better control of the total amount of waste oil processed and the processing cost.

[0020] 3. In this invention, the submersible pump is installed on the lower support frame. The high-pressure return fluid pumped out drives the hydraulic drive wheel to rotate, thereby driving the equipment to operate and reducing energy consumption.

[0021] 4. This invention uses a float assembly, which makes the equipment itself relatively small in weight and size. It can float on the water surface by buoyancy and is equipped with lifting rings for easy transportation and hoisting. It can be put into use at any time, is easy to put into the pool, and is easy to carry ashore for maintenance and storage.

[0022] 5. In this invention, the oil storage tank is equipped with a recovery oil pipe. When the waste oil level in the oil storage tank reaches a certain height, the self-starting submersible pump inside the tank works to transport the waste oil to the shore oil storage equipment for subsequent processing, which further improves the efficiency of the entire oil cleaning process.

[0023] 6. In this invention, the equipment adopts a self-contained low-voltage submersible pump hydraulic soft drive, which automatically starts the submersible pump to pump oil ashore for storage and treatment, thus avoiding the safety risks of temporary power supply.

[0024] 7. This invention features a retractable oil-collecting hose with a length that can be adjusted as needed. This allows all floating oil on the water surface to be contained within the oil-collecting area of ​​the equipment, ensuring that every corner of the pool is cleaned and guaranteeing thorough cleaning. Attached Figure Description

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments, wherein:

[0026] Figure 1 This is a structural diagram of the device of the present invention.

[0027] Marked in the image:

[0028] 1. Oil suction roller, 2. Support frame, 3. Oil storage assembly, 4. Roller chain, 5. Oil scraper groove, 6. Oil return pipe, 7. Hydraulic drive wheel, 8. Drive submersible pump, 9. Drive sprocket, 10. Pump water pipe, 11. Flexible oil suction brush, 12. Connecting pipe, 13. Oil recovery pipe, 14. Self-starting submersible pump, 15. Oil recovery hose, 16. Lifting ring, 17. Floating oil on water surface, 18. Backflow fluid, 19. Waste oil. Detailed Implementation

[0029] Example 1

[0030] See Figure 1 As a preferred embodiment of the present invention, it includes an oil suction roller 1, a support frame 2, an oil storage assembly 3, a float assembly, and a drive assembly. The oil storage assembly 3 is fixed to one end of the support frame 2. The oil suction roller 1 is provided with a roller chain 4 at its end and a through shaft at its axis. Bearing assemblies are installed at both ends of the through shaft and fixed to the support frame 2 by bolts. An oil scraping groove 5 is provided on the side of the oil suction roller 1 near the oil reservoir. The oil scraping groove 5 is fixedly connected to the support frame 2 by bolts. A through hole is provided on the oil scraping groove 5, and the through hole is connected to the oil storage assembly 3 through an oil return pipe 6. The float assembly is set at the suction roller 1. The oil drum 1 is fixedly connected to the oil storage assembly 3 and to the support frame 2. The drive assembly includes a hydraulic drive wheel 7 and a drive submersible pump 8. The hydraulic drive wheel 7 and the drive submersible pump 8 are fixed on the support frame 2. The hydraulic drive wheel 7 is coaxially mounted with a drive sprocket 9, which meshes with the drum chain 4 of the oil suction drum 1. The drive submersible pump 8 is connected to a pump water pipe 10, which is inserted into the interior of the hydraulic drive wheel 7. The drive submersible pump 8 pumps out high-pressure return fluid, which drives the hydraulic drive wheel 7 to rotate. At the same time, the drive sprocket 9 rotates at the same speed, driving the equipment to move and making the oil suction drum 1 rotate.

[0031] In this embodiment, the oil slick is automatically removed, and the entire removal work can be completed by just one person. No one is required to be on-site in the pool or to manage the operation during the removal process. This achieves automatic removal and saves a lot of labor costs. The oil-water separation process is completed in the pool. The oily liquid removed from the pool is mainly composed of oil, with a very low water content, resulting in high oil slick collection efficiency.

[0032] Example 2

[0033] See Figure 1As another preferred embodiment of the present invention, based on embodiment 1, the surface of the oil suction roller 1 is further provided with an elastic oil suction brush 11. When the equipment is running, the drive sprocket 9 meshes with the roller chain 4 of the oil suction roller 1 and drives the oil suction roller 1 to rotate at a low speed. The elastic oil suction brush 11 fixed on the surface of the oil suction roller 1 sucks up the floating oil and rotates accordingly. During the rotation, a small amount of backflow liquid flows back into the pool from the root of the brush. The floating oil continues to stick to the brush and rotates to the oil scraping groove 5. At this time, the oil and water are separated. When the oil-sticky brush passes through the oil scraping groove 5, it is scraped off and sinks into the oil scraping groove 5 for buffering and flows into the waste oil storage tank through the return oil pipe 6 for storage.

[0034] Example 3

[0035] See Figure 1 As another preferred embodiment of the present invention, based on Embodiment 1 and Embodiment 2, the support frame 2 further includes an upper support frame 2 and a lower support frame 2. The upper and lower support frames 2 are welded together by four supporting steel structures. The oil suction roller 1, the oil storage assembly 3, and the float assembly are arranged on the upper support frame 2, and the driving submersible pump 8 is arranged on the lower support frame 2.

[0036] Furthermore, the hydraulic drive wheel 7 comprises two sets, symmetrically arranged on the supporting steel structures at both ends near the oil suction drum 1.

[0037] Furthermore, the oil storage assembly 3 includes two oil storage tanks, the bottoms of which are connected by a curved connecting pipe 12.

[0038] Furthermore, the oil storage tank is connected to a recovery oil pipe 13, and a self-starting submersible pump 14 is installed at one end of the recovery oil pipe 13 that extends into the oil storage tank.

[0039] In this embodiment, when the waste oil level in the waste oil storage tank reaches a certain height, the self-starting submersible pump 14 inside the tank works to transport the waste oil to the onshore oil storage equipment for subsequent processing. By setting up two oil storage tanks connected by a connecting pipe 12, the capacity of a single floating oil collection is increased, the starting frequency of the self-starting submersible pump 14 is reduced, and energy consumption is reduced.

[0040] Example 4

[0041] See Figure 1As the preferred embodiment of the present invention, a high-efficiency oil collection device for gas field water flotation includes an oil suction drum 1, a support frame 2, an oil storage assembly 3, a float assembly, and a drive assembly. The oil storage assembly 3 is fixed to one end of the support frame 2. The oil suction drum 1 is provided with a drum chain 4 at its end and a through shaft at its axis. Bearing assemblies are installed at both ends of the through shaft and fixed to the support frame 2 by bolts. An oil scraping groove 5 is provided on the side of the oil suction drum 1 near the oil storage tank. The oil scraping groove 5 is fixedly connected to the support frame 2 by bolts. The oil scraping groove 5 is provided with a through hole, which is connected to the oil storage assembly 3 through a return oil pipe 6. The cylinder assembly is positioned between the oil suction drum 1 and the oil storage assembly 3 and is fixedly connected to the support frame 2. The drive assembly includes a hydraulic drive wheel 7 and a drive submersible pump 8. The hydraulic drive wheel 7 and the drive submersible pump 8 are fixed on the support frame 2. The hydraulic drive wheel 7 is coaxially mounted with a drive sprocket 9, which meshes with the drum chain 4 of the oil suction drum 1. The drive submersible pump 8 is connected to a pump water pipe 10, which is inserted into the interior of the hydraulic drive wheel 7. The drive submersible pump 8 pumps out high-pressure return fluid, which drives the hydraulic drive wheel 7 to rotate. At the same time, the drive sprocket 9 rotates at the same speed, moving the equipment and causing the oil suction drum 1 to rotate.

[0042] Furthermore, the surface of the oil-absorbing roller 1 is provided with an elastic oil-absorbing brush 11.

[0043] Furthermore, the support frame 2 includes an upper support frame 2 and a lower support frame 2. The upper and lower support frames 2 are welded together by four supporting steel structures. The oil suction roller 1, the oil storage component 3, and the float component are installed on the upper support frame 2, and the driving submersible pump 8 is installed on the lower support frame 2.

[0044] Furthermore, the hydraulic drive wheel 7 comprises two sets, symmetrically arranged on the supporting steel structures at both ends near the oil suction drum 1.

[0045] Furthermore, the oil storage assembly 3 includes two oil storage tanks, the bottoms of which are connected by a curved connecting pipe 12.

[0046] Furthermore, the oil storage tank is connected to a recovery oil pipe 13, and a self-starting submersible pump 14 is installed at one end of the recovery oil pipe 13 that extends into the oil storage tank.

[0047] Furthermore, grooved wheels are provided at both ends of the through shaft, and oil recovery hoses 15 are provided on the grooved wheels. The two ends of the oil recovery hoses 15 are connected to the grooved wheels, forming an oil collection ring with the oil suction roller 1 on the water surface.

[0048] Furthermore, the return oil pipe 6 is at a 30° angle to the horizontal plane and connects to the through hole of the oil scraper groove 5 and the oil storage assembly 3.

[0049] Furthermore, the upper support frame 2 is provided with a lifting ring 16.

[0050] In this embodiment, the entire device floats on the water surface due to buoyancy. The high-pressure backflow liquid pumped by the submersible pump 8 drives the hydraulic drive wheel 7 to rotate. The drive sprocket 9, which is coaxial with the hydraulic drive wheel 7, rotates at the same speed. The drive sprocket 9 meshes with the roller chain 4 of the oil suction roller 1 and drives the oil suction roller 1 to rotate at a low speed. The elastic oil suction brush 11 fixed on the surface of the oil suction roller 1 sucks up the floating oil and rotates accordingly. During the rotation, a small amount of backflow liquid flows back into the pool from the root of the brush. The floating oil continues to stick to the brush and rotates to the oil scraping groove 5. At this time, the oil and water are separated. When the oil-sticky brush passes through the oil scraping groove 5, it is scraped off and sinks into the oil scraping groove 5 for buffering and flows into the oil storage tank through the return oil pipe 6. When the waste oil level in the oil storage tank reaches a certain height, the self-starting submersible pump 14 in the tank works to transport the waste oil to the shore oil storage equipment for subsequent processing. Simultaneously, the grooved wheel, rotating coaxially and at the same speed as the oil suction drum 1, slowly retracts the floating oil recovery hose 15 at the far end, achieving complete collection of floating oil on the water surface. This embodiment of the gas field water-floating oil high-efficiency collection equipment can significantly save labor costs for floating oil recovery, improve the efficiency of floating oil collection, and reduce energy consumption, playing an important role in reducing costs and increasing efficiency for enterprises.

Claims

1. A high-efficiency oil flotation collection device for gas fields, characterized in that: The system includes an oil suction roller (1), a support frame (2), an oil storage assembly (3), a float assembly, and a drive assembly. The oil storage assembly (3) is fixed to one end of the support frame (2). The oil suction roller (1) has a roller chain (4) at its end and a through shaft at its axis. Bearing assemblies are installed at both ends of the through shaft and fixed to the support frame (2) with bolts. An oil scraping groove (5) is provided on the side of the oil suction roller (1) near the oil reservoir. The oil scraping groove (5) is fixed to the support frame (2) with bolts. A through hole is provided on the oil scraping groove (5). The through hole is connected to the oil storage assembly (3) through a return oil pipe (6). The float assembly is located between the oil suction roller (1) and the oil storage assembly (3). The drive assembly includes a hydraulic drive wheel (7) and a drive submersible pump (8), which are fixedly connected to the support frame (2). The hydraulic drive wheel (7) and the drive submersible pump (8) are fixed on the support frame (2). The hydraulic drive wheel (7) is coaxially mounted with a drive sprocket (9). The drive sprocket (9) meshes with the roller chain (4) of the oil suction roller (1). The drive submersible pump (8) is connected to a pump water pipe (10). The pump water pipe (10) is connected to the interior of the hydraulic drive wheel (7). The drive submersible pump (8) pumps out high-pressure return liquid and sprays it out to drive the hydraulic drive wheel (7) to rotate. At the same time, the drive sprocket (9) rotates at the same speed, driving the equipment to move and making the oil suction roller (1) rotate. The through shaft is also provided with grooved wheels at both ends, and oil recovery hoses (15) are provided on the grooved wheels. The oil recovery hoses (15) are connected to the grooved wheels at both ends, forming an oil collection ring with the oil suction roller (1) on the water surface.

2. The gas field water flotation oil high-efficiency collection equipment according to claim 1, characterized in that: The surface of the oil-absorbing roller (1) is provided with an elastic oil-absorbing brush (11).

3. The gas field water-float oil high-efficiency collection device according to claim 1, characterized in that: The support frame (2) includes an upper support frame (2) and a lower support frame (2). The upper and lower support frames (2) are welded together by four supporting steel structures. The oil suction roller (1), oil storage assembly (3), and float assembly are installed on the upper support frame (2), and the driving submersible pump (8) is installed on the lower support frame (2).

4. The gas field water flotation oil high-efficiency collection equipment according to claim 1, characterized in that: The hydraulic drive wheel (7) comprises two sets, symmetrically arranged on the supporting steel structures at both ends near the oil suction drum (1).

5. The gas field water flotation oil high-efficiency collection equipment according to claim 1, characterized in that: The oil storage assembly (3) includes two oil storage tanks, the bottoms of which are connected by a curved connecting pipe (12).

6. The gas field water flotation oil high-efficiency collection device according to claim 5, characterized in that: The oil storage tank is connected to a recovery oil pipe (13), and a self-starting submersible pump (14) is installed at one end of the recovery oil pipe (13) that extends into the oil storage tank.

7. The gas field water flotation oil high-efficiency collection equipment according to claim 1, characterized in that: The return oil pipe (6) is at a 30° angle to the horizontal plane and connects the through hole of the oil scraper groove (5) and the oil storage assembly (3).

8. The gas field water flotation oil high-efficiency collection device according to claim 3, characterized in that: The upper support frame (2) is equipped with a lifting ring (16).

9. The method of using a high-efficiency oil flotation collection device for gas fields according to any one of claims 1-8, characterized in that: Before the equipment is put into the backflow liquid storage tank, adjust the length of the oil recovery hose (15) to the length of the area to be cleaned, then hoist the equipment onto the backflow liquid storage tank, and then surround the water surface of the backflow liquid storage tank with the oil recovery hose (15) to form an oil production space. Then drive the submersible pump (8) to start working and begin the oil cleaning work.

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