A crude oil collection device

Abstract

The application discloses a crude oil trapping device, which comprises a hollow trapping cylinder, the trapping cylinder comprises a cylinder body, one end of the cylinder body is open, a flange cover is fixedly connected to the open end of the cylinder body, a liquid inlet port, an oil collection port, a water discharge port and a balance port are formed in the horizontal direction of the trapping cylinder, an extrusion piston is arranged in the cylinder body, oleophilic filler is filled in the extrusion piston, and the oleophilic filler covers the cavity area in the cylinder body; a pushing device is fixed to the flange cover and connected to the extrusion piston, and the pushing device can make the extrusion piston reciprocate in the horizontal direction in the cylinder body. The oleophilic filler is used as a carrier to adsorb crude oil in oilfield produced liquid and filter water in the produced liquid. When adsorption is saturated, the crude oil adsorbed in the oleophilic filler is extruded and collected through extrusion, and the problems of conventional oil-water separation equipment, such as large size, high cost, poor oil-water separation effect of high-water-content produced liquid and the like, are solved.

Description

Technical Field

[0001] This invention belongs to the field of crude oil capture technology and relates to a crude oil capture device. Background Technology

[0002] During oilfield extraction, due to the complex structure of underground oil layers, ash oil with high water content often gets mixed into crude oil, resulting in produced fluid appearing as a mixture of oil and water, which reduces the quality of crude oil. Therefore, separation equipment is needed to separate them.

[0003] Current separation technologies often require the construction of large tanks for the stable stratification, separation, and distribution of produced fluids, resulting in bulky and expensive equipment. Furthermore, as the water cut of produced fluids in oilfields continues to rise, conventional oil-water separation methods become increasingly ineffective, significantly reducing the economic value of wells with low production rates and high water cuts. Therefore, improving the oil-water separation effect of produced fluids has become a hot topic in the industry, and a truly ideal solution remains elusive. Summary of the Invention

[0004] The purpose of this invention is to provide a crude oil capture device that solves the problem of poor oil-water separation in the produced fluid in the prior art.

[0005] The technical solution adopted in this invention is a crude oil capture device, comprising a cavity capture cylinder, the capture cylinder including a cylinder body, one end of the cylinder body being open, and a flange cover being fixedly connected to the open end of the cylinder body. The capture cylinder is provided with a liquid inlet port, an oil collection port, a drain port and a balance port along its horizontal direction; a squeeze piston is provided inside the cylinder body, the squeeze piston is filled with oleophilic filler, and the oleophilic filler covers the cavity area inside the cylinder body; a pushing device is fixed on the flange cover, the pushing device is connected to the squeeze piston, and the pushing device can make the squeeze piston move back and forth in the horizontal direction inside the cylinder body.

[0006] The invention is further characterized by:

[0007] The pushing device includes a gantry fixed to one side of the flange cover, a gantry tail beam fixedly connected to the end of the gantry, a piston rod horizontally arranged inside the gantry that passes through the flange cover, a compression piston fixedly connected to one end of the piston rod, and a housing fitted on the piston rod, with an electric servo motor installed at the tail end of the housing.

[0008] The piston rod and flange cover are sealed with soft packing.

[0009] A sliding sleeve is provided at the point where the piston rod contacts the extrusion piston. The sliding sleeve is connected to a sliding sleeve switch, which is fixed to a sliding sleeve switch seat. The liquid inlet end of the sliding sleeve switch is provided with a sliding sleeve seat mesh. The sliding sleeve switch is fastened to the extrusion piston, and the sliding sleeve of the sliding sleeve switch is provided with a hinged anchor point.

[0010] The cylinder has a cylindrical hollow structure, and the extrusion piston fits into the inner wall of the cylinder.

[0011] The oleophilic filler is made of fiber composite material with PP as the main material.

[0012] The drain port and balance port are located on the flange cover at the open end of the collection tube, while the liquid inlet port and oil collection port are located at the opposite end of the open end of the collection tube.

[0013] The vertical height of the drain port is lower than that of the balance port, and the vertical height of the oil collection port is lower than that of the liquid inlet port.

[0014] The inlet port is equipped with an inlet mesh, and the oil collection port is equipped with an oil collection mesh. Both the inlet mesh and the oil collection mesh have multiple mesh openings and are used to filter and restrict the flow of fluid.

[0015] The parts of the liquid inlet port, oil collection port, drain port, and balance port located outside the collection cylinder are fixedly connected to flanges by threads for sealing the connection interfaces.

[0016] This invention uses an oleophilic filler as a carrier to adsorb crude oil from produced fluids and filter out water. Once saturated, the adsorbed crude oil is squeezed out and collected from the filler. It offers advantages such as small size, low investment, light weight, ease of skid-mounting, and no need for prolonged settling separation. It solves the problems of conventional oil-water separation equipment, such as large size, high cost, and poor separation efficiency, especially in high water content oil-water separation. It has broad application potential and good economic value, while also offering advantages such as safety, reliability, and ease of maintenance. Attached Figure Description

[0017] Figure 1 This is a front view of a crude oil capture device according to the present invention;

[0018] Figure 2 This is a cross-sectional view of a crude oil capture device according to the present invention;

[0019] Figure 3 This is a top view of a crude oil capture device according to the present invention;

[0020] Figure 4 This is a left view of a crude oil capture device according to the present invention.

[0021] In the diagram, 1. Collection cylinder; 2. Pushing device; 3. Liquid inlet port; 4. Oil collection port; 5. Drain port; 6. Balance port; 7. Cylinder body; 8. Extrusion piston; 9. Oleophilic packing; 10. Sliding sleeve seat mesh; 11. Liquid inlet mesh; 12. Oil collection mesh; 13. Flange cover; 14. Sliding sleeve switch seat; 15. Sliding sleeve; 16. Piston rod; 17. Housing; 18. Gantry frame; 19. Gantry tail beam; 20. Electric servo motor. Detailed Implementation

[0022] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0023] Example 1

[0024] like Figures 1-4 As shown, this invention provides a crude oil capture device designed to address the problem of poor oil-water separation in existing technologies. It includes a capture cylinder 1, a pushing device 2, a liquid inlet port 3, an oil collection port 4, a drain port 5, and a balancing port 6. The capture cylinder 1 includes a cylinder body 7 and a flange cover 13. The cylinder body 7 contains a compression piston 8 and oleophilic filler 9. The capture cylinder 1 has external ports for liquid inlet, oil collection, drain, and balancing. The pushing device 2 consists of a gantry frame 1818, a piston rod 16, a housing 17, a gantry frame 18, a gantry tail beam 19, and an electric servo motor 20. The portions of the liquid inlet port 3 and the oil collection port 4 within the capture cylinder 1 have mesh openings, with corresponding liquid inlet mesh openings 11 and oil collection mesh openings 12. The portions outside the capture cylinder 1 have flanges, threads, and other sealing connection interfaces. The drain port 5 has flanges, threads, and other sealing connection interfaces. The balancing port 6 has flanges, threads, and other sealing connection interfaces.

[0025] The extrusion piston 8 is equipped with a sliding sleeve switch, which includes a sliding sleeve seat mesh 10, a sliding sleeve switch seat 14, and a sliding sleeve 15. The liquid inlet end of the sliding sleeve switch has a mesh. The sliding sleeve switch is fastened to the extrusion piston 8. The other side of the sliding sleeve 15 of the sliding sleeve switch is provided with a hinge anchor point.

[0026] The cylinder 7 is provided with a liquid inlet port 3 and an oil collection port 4. The part located inside the collection cylinder 1 is provided with a liquid inlet mesh 11 and an oil collection mesh 12. The external port forms include, but are not limited to, flanges and threads.

[0027] The flange cover 13 is provided with a drain port 5, a balance port 6 and a piston rod 16 sealing through hole, wherein the port forms include, but are not limited to, flanges and threads.

[0028] One end of the gantry frame 18 is fastened to the flange cover 13, and the other end is provided with a hinged anchor point.

[0029] The electric servo push rod consists of a piston rod 16, a housing 17, a gantry frame 18, a gantry tail beam 19, and an electric servo motor 20. The housing 17 is connected to the hinge anchor point of the gantry tail beam 19. The piston rod 16 passes through the sealing hole of the flange cover 13 and is connected to the hinge anchor point of the sliding sleeve 15. The piston rod 16 and the flange cover 13 are sealed with soft packing. The electric servo motor 20 is installed at the tail end of the housing 17 of the electric servo push rod for transmission to ensure the reciprocating motion of the extrusion piston 8.

[0030] The oleophilic filler 9 is made of fiber composite material with PP as the main material. It has the characteristics of being oleophilic but not hydrophilic, which can completely adsorb crude oil and completely separate oil and water.

[0031] Example 2

[0032] The present invention discloses a crude oil collection device, comprising a hollow collection cylinder 1, a compression piston 8 disposed within the cylinder body 7, the compression piston 8 being filled with oleophilic filler 9, the oleophilic filler 9 covering the hollow area within the cylinder body 7; a pushing device 2 fixed on a flange cover 13, the pushing device 2 being connected to the compression piston 8, the pushing device 2 enabling the compression piston 8 to reciprocate horizontally within the cylinder body 7. The collection cylinder 1 is provided with a liquid inlet port 3, an oil collection port 4, a drain port 5, and a balance port 6 along its horizontal direction.

[0033] The pushing device 2 includes a gantry frame 18 fixed to one side of the flange cover 13. A gantry tail beam 19 is fixedly connected to the end of the gantry frame 18. A piston rod 16, penetrating the flange cover 13, is horizontally arranged inside the gantry frame 18. One end of the piston rod 16 is fixedly connected to a compression piston 8, and the other end of the piston rod 16 is fixedly connected to the gantry tail beam 19. A housing 17 is fitted onto the piston rod 16, and an electric servo motor 20 is installed at the tail end of the housing 17. A soft packing seal is used between the piston rod 16 and the flange cover 13.

[0034] A sliding sleeve 15 is provided at the contact point between the piston rod 16 and the extrusion piston 8. The sliding sleeve is connected to a sliding sleeve switch, which is fixed to the sliding sleeve switch seat 14. The liquid inlet end of the sliding sleeve switch is provided with a sliding seat mesh. The sliding sleeve switch and the extrusion piston 8 are tightly connected. The sliding sleeve 15 of the sliding sleeve switch is provided with a hinge anchor point. The cylinder 7 is a cylindrical cavity structure, and the extrusion piston 8 is in contact with the inner wall of the cylinder 7.

[0035] The oleophilic filler 9 is a fiber composite material mainly composed of PP. The drain port 5 and balance port 6 are located on the flange cover 13 at the open end of the collecting cylinder 1, while the liquid inlet port 3 and oil collection port 4 are located at opposite ends of the open end of the collecting cylinder 1. The vertical height of the drain port 5 is lower than that of the balance port 6, and the vertical height of the oil collection port 4 is lower than that of the liquid inlet port 3. The liquid inlet port 3 has a liquid inlet mesh 11, and the oil collection port 4 has an oil collection mesh 12. Both the liquid inlet mesh 11 and the oil collection mesh 12 have multiple mesh openings for filtering and limiting the flow of fluid. The portions of the liquid inlet port 3, oil collection port 4, drain port 5, and balance port 6 located outside the collecting cylinder 1 are fixedly connected to flanges via threads for sealing the connection interfaces.

[0036] The specific usage process of the device of the present invention is as follows:

[0037] S1: In use, the piston rod 16 is pulled into the housing 17 by the electric servo motor 20 in the reverse direction. Under the drive of the piston rod 16, the sliding sleeve 15 is pulled to the left side of the sliding sleeve switch seat 14, the sliding sleeve switch is opened, and the electric servo motor 20 is de-energized; the liquid inlet port 3 and the drain port 5 are opened, and the oil collection port 4 and the balance port 6 are closed.

[0038] S2: The oil-water mixture of the produced fluid enters the collection cylinder 1 through the inlet port 3. The oily medium is captured and adsorbed by the oleophilic packing 9 inside the cylinder, while the watery medium permeates to the left through the pores of the packing. When it permeates to the squeezing piston 8, it flows to the back side of the squeezing piston 8 through the flow hole opened between the sliding sleeve switch seat 14 and the sliding sleeve 15, and is discharged from the collection cylinder 1 through the drain port 5.

[0039] S3: When the oleophilic filler 9 is saturated with adsorption, shut off the liquid inlet port 3 and the drain port 5 to complete one hydrophobic cycle.

[0040] S4: Open the oil collection port 4 and balance port 6. The electric servo motor 20 is powered upward to push the piston rod 16 out of the housing 17. Driven by the piston rod 16, the sliding sleeve 15 is pushed to the right side of the sliding sleeve switch seat 14, turning off the sliding sleeve switch. The electric servo motor 20 continues to be powered on. Under the push of the piston rod 16, the squeeze piston 8 moves to the left, thereby squeezing the oleophilic filler 9 in the cylinder and squeezing out the oily substances captured and adsorbed therein. The squeezed medium seeps into the oil collection pipe through the gaps of the oil collection mesh 12, is discharged through the oil collection port 4, and pumped into other containers.

[0041] S5: The balancing gas enters the cylinder 7 through the balancing port 6 to compensate for the ever-expanding volume on the left side of the compression piston 8.

[0042] S6: When the piston rod 16 reaches the preset stroke, the electric servo motor 20 is turned off, and the oil collection port 4 and the balance port 6 are turned off, completing one oil collection cycle.

[0043] S7: By alternating between hydrophobic and oil-collecting operations, crude oil is captured in the produced fluid. Repeating the above steps will achieve oil-water separation of the produced fluid.

[0044] Implementation process and principle:

[0045] In use, the crude oil capture device of this invention is installed in oil extraction equipment via a flange as the connection interface. When crude oil needs to be captured, it is input into the cylinder 7 of the capture cylinder 1 through the inlet port 3, entering the cavity inside the capture cylinder 1. At this time, the electric servo motor 20 starts and rotates the housing 17, driving the piston rod 16 to move to the left, and the compression piston 8 to move to the left, causing the oleophilic packing 9 to be squeezed and deformed, subjecting the oil-water mixture to sufficient pressure. Because the pressure is greater than the surface tension of the oil-water mixture, it separates, and the crude oil is dispersed throughout the oleophilic packing 9. Relying on the absorption and filtration functions of the oleophilic packing 9, the oil-water separation process is completed, and the separated oil is output from the oil collection port 4. At the same time, because the oleophilic packing 9 fills the entire cylinder 7, the contact surface area between the crude oil and the oleophilic packing 9 is large, allowing the oil to be dispersed throughout the packing, thereby improving the separation effect. Finally, the separated water is discharged from the drain port 5, thus achieving an effective oil-water separation effect. Because it uses a purely physical separation method, it does not produce any chemical byproducts or pollution during operation, making it an environmentally friendly and energy-saving physical oil-water separation device.

[0046] The crude oil capture device provided by this invention can effectively reduce the ash oil content of the produced fluid, improve the separation effect of the produced fluid, and can completely achieve physical separation during the separation process, thereby avoiding environmental and human hazards that may occur in other crude oil screening methods or technical processing.

[0047] The advantages of this invention are high crude oil separation efficiency, short separation time, simple and reliable operation, easy cleaning, corrosion-resistant materials, long service life, no environmental hazards, and space saving, exhibiting significant environmental advantages. Furthermore, this crude oil capture device has a wide range of applications and strong practicality during use. This crude oil capture device is suitable for crude oil capture and separation in the petroleum industry and has broad application prospects.

[0048] In practical applications, this crude oil capture device not only improves the quality of produced fluids and avoids interference from impurities such as water, sand, and mud, but also significantly reduces production costs and environmental pollution. It effectively removes impurities from the mixed water and oil, resulting in more thorough oil-water separation and thus improving the efficiency and profitability of oil extraction. Furthermore, its simple and reliable structure makes installation, cleaning, and maintenance very convenient, allowing for widespread application in oil production and processing sites.

[0049] In summary, the crude oil capture device provided by this invention adopts a physical separation method combining oleophilic packing 9 and electric servo motor 20. While ensuring separation effect and separation time, it avoids potential environmental and human hazards, has strong practical application and broad application prospects, and is an excellent oil-water separation device.

Claims

1. A crude oil capture device, characterized in that, The system includes a hollow collection cylinder (1), which includes a cylinder body (7) with one end open. A flange cover (13) is fixedly connected to the open end of the cylinder body (7). The collection cylinder (1) has a liquid inlet port (3), an oil collection port (4), a drain port (5), and a balance port (6) along its horizontal direction. A squeeze piston (8) is provided inside the cylinder body (7), and the squeeze piston (8) is filled with oleophilic filler (9), which covers the hollow area inside the cylinder body (7). A pusher (2) is fixed on the flange cover (13), and the pusher (2) is connected to the squeeze piston (8). The pusher (2) can make the squeeze piston (8) move back and forth in the horizontal direction inside the cylinder body (7). The pushing device (2) includes a gantry frame (18) fixed to one side of the flange cover (13), a gantry tail beam (19) fixedly connected to the end of the gantry frame (18), a piston rod (16) that passes through the flange cover (13) is horizontally arranged inside the gantry frame (18), one end of the piston rod (16) is fixedly connected to the extrusion piston (8), the other end of the piston rod (16) is fixedly connected to the gantry tail beam (19), a housing (17) is sleeved on the piston rod (16), and an electric servo motor (20) is installed at the tail end of the housing (17). The piston rod (16) and the flange cover (13) are sealed with soft packing. A sliding sleeve (15) is provided at the point where the piston rod (16) contacts the extrusion piston (8). The sliding sleeve (15) is connected to a sliding sleeve switch. The sliding sleeve switch is fixed to the sliding sleeve switch seat (14). The liquid inlet end of the sliding sleeve switch is provided with a sliding sleeve seat mesh (10). The sliding sleeve switch is fastened to the extrusion piston (8). The sliding sleeve (15) of the sliding sleeve switch is provided with a hinge anchor point. The cylinder (7) has a cylindrical cavity structure, and the extrusion piston (8) is in contact with the inner wall of the cylinder (7); The oleophilic filler (9) is made of fiber composite material with PP as the main material; The drain port (5) and the balance port (6) are opened on the flange cover (13) at the open end of the collection tube (1), and the liquid inlet port (3) and the oil collection port (4) are opened at opposite ends of the open end of the collection tube (1).

2. The crude oil capture device according to claim 1, characterized in that, The vertical height of the drain port (5) is lower than that of the balance port (6) in the vertical direction, and the vertical height of the oil collection port (4) is lower than that of the liquid inlet port (3) in the vertical direction.

3. The crude oil capture device according to claim 1, characterized in that, The liquid inlet port (3) is provided with a liquid inlet mesh (11), and the oil collection port (4) is provided with an oil collection mesh (12). The liquid inlet mesh (11) and the oil collection mesh (12) are structures with multiple mesh holes, used for filtering and limiting the flow of fluid.

4. The crude oil capture device according to claim 1, characterized in that, The parts of the liquid inlet port (3), oil collection port (4), drain port (5) and balance port (6) located outside the collection cylinder (1) are fixedly connected to flanges by threads, and the flanges are used to seal the connection interfaces.

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