Oil-water separation lifting device and pressure-bearing unit

Abstract

The present invention provides an oil-water separation lifting device, which relates to the field of oil-water separation lifting devices, including a support pipe, a power device for lifting the lower lifting pipe is provided on the top of the support pipe; a flange I for fixing to a storage tank is sleeved on the outer circumference of the lifting pipe, the lifting pipe can move up and down in the flange I, and a pressure-bearing unit is provided between the two, and a connecting section is provided at the bottom of the lifting pipe; a large hole is provided in the center of the hanging plate, the diameter of the large hole is larger than the outer diameter of the lifting pipe, the outer diameters of the circular plate I and the circular plate II are both larger than the outer diameters of the lifting pipe and the large hole, and a small hole is provided in the center of the circular plate I and the circular plate II, the circular plate I, the hanging plate, and the circular plate II are sequentially sleeved on the connecting section, and the circular plate I, the hanging plate, and the circular plate II are fixed to the lifting pipe by nuts. At this time, the circular plate I and the circular plate II restrict the hanging plate from moving up and down, but the hanging plate can move left and right because the diameter of the large hole is larger than the outer diameter of the connecting section; beneficial effects: the device has good sealing effect and can adjust the lifting height of the oil-water interface.

Description

Technical Field

[0001] The present invention belongs to the field of oil-water treatment, and in particular relates to an oil-water separation and lifting device and a pressure-bearing unit. Background Art

[0002] The liquid produced from oil extraction contains oil, water, and gas. Before being stored in a metering room, the oil requires a simple oil-water separation process. The oil is then stored and the water is reinjected into the formation. Typically, the extracted liquid is filtered through solid impurities such as sand and gravel. It then passes through corrugated plates or other devices, causing the liquid to collide with each other. Oil droplets aggregate into larger droplets, which then float upwards due to gravity, completing the oil-water separation. The treated liquid is then discharged into a storage tank, where the oil floats on the water surface. A lifting device pumps the floating oil to the other side of the storage chamber, while the water below is reinjected into the formation, completing the simple oil-water separation.

[0003] The disadvantages are:

[0004] (1) There may be air leakage at the connection between the lifting device and the top surface of the storage tank. Since the liquid just mined contains toxic gases, once it evaporates, it will seriously affect the surrounding environment and the health of the workers.

[0005] (2) The current lifting device cannot adjust the lower pumping height during use, so it cannot better divide the oil-water interface. In addition, the oil-water ratio produced by each well or even a single well in different time periods is inconsistent. Therefore, when the same interface is used for pumping oil, when there is more water than oil and the water interface is high, the oil-water separation effect is poor.

[0006] Therefore, we developed a new oil-water separation and lifting device. Summary of the Invention

[0007] In order to solve the above problems, the present invention provides an oil-water separation and lifting device with good sealing effect and the ability to adjust the oil-water interface.

[0008] The technical solution of the present invention is:

[0009] An oil-water separation lifting device comprises a support pipe, wherein a power device for lifting the lower lifting pipe is provided on the top of the support pipe; the lifting pipe is enabled to adjust the height of its lower structural unit through the power device to further adjust the height of the oil-water interface.

[0010] The structural unit is as follows: a connecting section with a diameter smaller than that of the lifting pipe is provided at the bottom of the lifting pipe, and a thread is provided on the front end of the connecting section; a large hole is provided in the center of the hanging plate, the diameter of the large hole is larger than the outer diameter of the lifting pipe, and the diameter of the large hole is larger than the outer diameter of the connecting section; the outer diameters of the circular plates I and II are both larger than the outer diameters of the lifting pipe and the large hole; the centers of the circular plates I and II are each provided with a small hole matching the outer diameter of the connecting section; the circular plates I, the hanging plate, and the circular plate II are sequentially sleeved on the connecting section, and the circular plates I, the hanging plate, and the circular plate II are fixed to the lifting pipe by screwing on the nut I. At this time, the circular plates I and II restrict the hanging plate from moving up and down, but the hanging plate can move left and right because the diameter of the large hole is larger than the outer diameter of the connecting section;

[0011] Furthermore, a plurality of round steels are fixedly connected to the bottom surface of the hanging plate, a protective pipe II is sleeved on the outer circumference surrounded by the plurality of round steels, and the protective pipe II and the bottom of the round steel are fixedly connected to the flange assembly; the lower lifting pipe moves up and down within the inner circumference surrounded by the plurality of round steels; further, the fixed connection method includes welding;

[0012] Furthermore, the outer surfaces of the riser and round steel are polished;

[0013] Preferably, the number of the round steel bars is 4;

[0014] Furthermore, the plug of the riser includes the connecting section, and the other end of the plug is inserted into the riser and fixedly connected to the riser;

[0015] Furthermore, the power device adjusts the height of the riser as follows:

[0016] The power device is a lifting motor, which is fixed to the top surface of the support tube. The long shaft of the lifting motor is provided with a thread. The flange II is passed through the long shaft, and the interior of the "convex"-shaped copper nut is connected to the long shaft through a thread. One end of the outer portion of the copper nut is fixedly connected to the flange II. After the flange II is passed through the lifting tube, it is fixedly connected to the top surface of the lifting tube. After the other end of the outer portion of the copper nut is clamped on the flange II and the lifting tube, the flange II and the flange II are fixedly connected by bolts and nuts.

[0017] The support tube is provided with a vertically elongated limiting hole on its circumference, and a limiting rod is fixedly connected to one side of the flange II, and the limiting rod passes through the limiting hole;

[0018] After the lifting motor is turned on, the long shaft rotates. Due to the limiting effect of the limit rod, the flange II and the copper nut cannot rotate, but can only drive the flange II to move on the long shaft. By controlling the rotation direction of the lifting motor, the rise or fall can be further controlled. Furthermore, the lifting motor drives the lifting pipe and the protective pipe II to move up and down to further adjust the oil pumping height;

[0019] Furthermore, the long shaft of the lifting motor is connected to the input shaft of the reducer through a clamping device, and the reducer enables the long shaft to run at a uniform speed;

[0020] The outer circumferential surface of the lifting pipe is sleeved with a flange I for fixing to the storage tank. The lifting pipe can move up and down in the flange I, and a pressure-bearing unit is provided between the two. The pressure-bearing unit is as follows: one end of the lifting pipe is sleeved with a cover plate and a protective pipe I in sequence from top to bottom. A straight-sided copper sleeve and a flanged copper sleeve with an inner diameter matching the outer diameter of the lifting pipe are sleeved between the lifting pipe and the protective pipe I. The flanged copper sleeve is pressed on the upper part of the straight-sided copper sleeve, and a sealing ring is provided between the two. The bottom of the straight-sided copper sleeve is against the inside of the protective pipe I, the top surface of the protective pipe I is against the bottom surface of the flange of the flanged copper sleeve, and the top surface of the flange is against the bottom surface of the cover plate. The flange I is sleeved on the outer circumferential surface of the protective pipe I, and the two are fixedly connected. The flange I is fixedly connected to the cover plate by bolts and nuts.

[0021] Furthermore, a groove is provided in the protective tube I at the bottom of the straight-edge copper sleeve, and a sealing ring is provided in the groove. Preferably, the sealing ring between the flanging copper sleeve and the straight-edge copper sleeve is an O-ring, and the sealing ring in the groove is a Y-ring.

[0022] Furthermore, the present application also includes an oil extraction pipe for transporting oil, one end of which is provided on the oil-water separation lifting device for extracting oil or water, the oil extraction port of the oil extraction pipe being lifted by the power device, and the other end being connected to the oil storage area;

[0023] Preferably, one end of the oil extraction pipe is inserted into and fixed on the circumference of the protective pipe II, and the other end is fixedly connected to the flange assembly on the outer circumference of the protective pipe II, and is fixedly connected to another pipe through the flange assembly, and the other end of the pipe is inserted into the oil storage area.

[0024] The beneficial effects of the present invention are:

[0025] The power device in the oil-water separation lifting device is used to lift the lower lifting pipe and the structural unit to further adjust the height of the oil or water absorption. Therefore, when the height of the oil-water interface changes, for example, when there is more water and less oil, the height of the structural unit is adjusted upward. This device can adapt to the working requirements of different working conditions and has multiple uses.

[0026] Because the device is used in a pressure vessel and needs to withstand the working pressure and working temperature of the medium, it is necessary to maintain a leak-proof seal. The special pressure-bearing unit of this application, namely, the protective tube II, the straight-edge copper sleeve, the flanged copper sleeve, the Y-type sealing ring, the O-type sealing ring, the pressure cover, and the flange I together form the pressure-bearing unit. Therefore, when the lifting tube moves up and down in the protective tube II, an O-type sealing ring is provided between the straight-edge copper sleeve and the flanged copper sleeve closest to the lifting tube. Therefore, the gas will not pass through the space between the straight-edge copper sleeve, the flanged copper sleeve and the lifting tube, nor will it pass through between the O-type sealing ring and the protective tube II, thereby ensuring the sealing. The present application has two sealing structures, the second of which is the Y-type sealing ring in the protective tube II, which further ensures the sealing. Moreover, this seal will expand and tighten under the pressure of the medium, which is self-sealing, and completely eliminates the possibility of medium leakage.

[0027] The lifting pipe plug, circular plate I, circular plate II, hanging plate, lower lifting pipe, round steel, and flange assembly together constitute a structural unit. Since the hanging plate is restricted on the lifting pipe by circular plate I and circular plate II, and circular plate I, hanging plate, and circular plate II are fixed to the lifting pipe by nut I, circular plate I and circular plate II restrict the hanging plate from moving up and down. However, since the diameter of the large hole is larger than the outer diameter of the connecting section, the hanging plate can move left and right. Combined with four round steels, they act as guide rails, and the two structures form a self-centering function of the lifting pipe. When it is not concentric, it can automatically adjust due to the action of force, effectively avoiding jamming during the lifting process.

[0028] The polishing treatment of the outer surface of the lifting pipe and round steel can further avoid and reduce the jamming phenomenon during the lifting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the oil-water separation and lifting device;

[0030] Figure 2 is a schematic diagram of a pressure unit;

[0031] Figure 3 yes Figure 1 Schematic diagram of the AA direction;

[0032] Figure 4 This is a reference diagram of the oil-water separation lifting device in use;

[0033] Figure 5 This is the principle diagram of oil-water interface division;

[0034] Figure 6 This is a photo of the upper part of the oil-water separation lifting device;

[0035] Figure 7 This is a photo of the lower half of the oil-water separation lifting device;

[0036] In the picture:

[0037] 1. Flange assembly 3. Lower riser 4. Copper nut

[0038] 5. Flange II 6. Protective pipe II 7. Round steel

[0039] 8. Nut I 9. Hanging plate 10. Round plate I

[0040] 11. Circular plate II 12. Plug 13. Riser

[0041] 14. Flange I 15. Lifting motor 16. Reducer

[0042] 22. Support tube 24. Limit rod

[0043] 25. Flange II 26. Limiting hole 29. Cover 31. Flanged copper sleeve 32. O-ring 33. Protective tube I

[0044] 34, straight-edge copper sleeve 35, Y-shaped sealing ring 9-1, large hole

[0045] 10-1, small hole 12-1, connecting section 31-1, flange

[0046] 36, pumping pipe 37, storage area 15-1, long axis DETAILED DESCRIPTION

[0047] In this embodiment, Figure 1 The oil-water separation lifting device shown in the figure includes a support pipe 22, and a power device for lifting the lower lifting pipe 3 is provided on the top of the support pipe 22; a flange I14 for fixing to the storage tank is provided on the outer circumference of the lifting pipe 13, and the lifting pipe 13 can move up and down within the flange I14 with a pressure-bearing unit provided between the two. The power device allows the lifting pipe 13 to adjust the height of its lower structural unit to further adjust the height of the oil-water interface.

[0048] When using this device, first assemble the pressure unit, and then assemble the structural unit. Specifically:

[0049] 1. Such as Figure 2The pressure-bearing unit shown is as follows: one end of the lifting tube 13 is sequentially sleeved with a cover plate 29 and a protective tube I 33 from top to bottom; a straight-sided copper sleeve 34 and a flanged copper sleeve 31 whose inner diameter matches the outer diameter of the lifting tube 13 are sleeved between the lifting tube 13 and the protective tube I 33; the flanged copper sleeve 31 is pressed against the upper portion of the straight-sided copper sleeve 34 with a sealing ring provided therebetween; the bottom of the straight-sided copper sleeve 34 abuts against the inside of the protective tube I 33; the top surface of the protective tube I 33 abuts against the bottom surface of the flange 31-1 of the flanged copper sleeve 31; the top surface of the flange 31-1 abuts against the bottom surface of the cover plate 29; the flange I 14 is sleeved on the outer circumferential surface of the protective tube I 33 and the two are fixedly connected; the flange I 14 is fixedly connected to the cover plate 29 by bolts and nuts;

[0050] Furthermore, a groove is provided in the protective tube I 33 at the bottom of the straight-edge copper sleeve 34, and a sealing ring is provided in the groove. Preferably, the sealing ring between the flanged copper sleeve 31 and the straight-edge copper sleeve 34 is an O-ring 32, and the sealing ring in the groove is a Y-ring 35.

[0051] The pressure-bearing unit is assembled as follows: the cover plate 29, the flanged copper sleeve 31, the O-ring 32, and the straight-edge copper sleeve 34 are sequentially put on the lifting pipe 13, and then the protective tube I 33 is put on and the Y-shaped sealing ring 35 is installed. Then the flange I 14 is put on the outer circumference of the protective tube I 33. At this time, the bolts are inserted into the flange I 14 and the cover plate 29 and the bolts are tightened to complete the above assembly.

[0052] 2. Such as Figure 1 The structural unit shown is as follows: a connecting section 12-1 having a diameter smaller than that of the lifting tube 13 is provided at the bottom of the lifting tube 13, and a thread is provided on the front end of the connecting section 12-1; a large hole 9-1 is provided in the center of the hanging plate 9, which passes through the hanging plate 9, and the diameter of the large hole 9-1 is larger than the outer diameter of the lifting tube 13, and the diameter of the large hole 9-1 is larger than the outer diameter of the connecting section 12-1; the outer diameters of the circular plate I10 and the circular plate II11 are both larger than the outer diameters of the lifting tube 13 and the large hole 9-1, and the centers of the circular plates I10 and II11 are both provided with small holes 10-1 that match the outer diameter of the connecting section 12-1.

[0053] Furthermore, a plurality of round steels 7 are welded to the bottom surface of the hanging plate 9, and the protective pipe II 6 is sleeved on the outer circumference surrounded by the plurality of round steels 7. The bottoms of the protective pipe II 6 and the round steels 7 are welded to the flange assembly 1; the lower lifting pipe 3 moves up and down within the inner circumference surrounded by the plurality of round steels 7;

[0054] Furthermore, the outer surfaces of the riser 13 and the round steel 7 are polished;

[0055] Preferably, the number of the round steel bars 7 is 4;

[0056] Furthermore, the plug 12 of the riser 13 includes the connecting section 12 - 1 , and the other end of the plug 12 is inserted into the riser 13 and then welded to the riser 13 ;

[0057] The assembly process of the structural unit is as follows: the circular plate I 10, the hanging plate 9, and the circular plate II 11 are sequentially placed on the connecting section 12 - 1. The circular plate I 10, the hanging plate 9, and the circular plate II 11 are fixed to the lifting pipe 13 by tightening the nut I 8. At this time, the circular plates I 10 and II 11 restrict the hanging plate 9 from moving up and down. However, because the diameter of the large hole 9 - 1 is larger than the outer diameter of the connecting section 12 - 1, the hanging plate 9 can move left and right.

[0058] 3. Working step 2 and this step 3 can be interchanged. The assembly process of step 3 is as follows:

[0059] The power device is a lifting motor 15, which is fixed to the top surface of the support tube 22. The long axis 15-1 of the lifting motor 15 is provided with a thread; the flange II 25 is passed through the long axis 15-1, and the interior of the "convex"-shaped copper nut 4 is connected to the long axis 15-1 through a thread. One end of the outer portion of the copper nut 4 is fixedly connected to the flange II 25. After the flange II 5 is passed through the lifting tube 13, it is fixedly connected to the top surface of the lifting tube 13. After the other end of the outer portion of the copper nut 4 is clamped on the flange II 5 and the lifting tube 13, the flange II 5 and the flange II 25 are fixedly connected by bolts and nuts.

[0060] The support tube 22 is provided with a vertically elongated limiting hole 26 on its circumference. A limiting rod 24 is welded to one side of the flange II 25 , and the limiting rod 24 passes through the limiting hole 26 .

[0061] After the lifting motor 15 is turned on, the long shaft 15-1 rotates. Due to the limiting effect of the limit rod 24, the flange II 25 and the copper nut 4 cannot rotate, but can only drive the flange II 25 to move on the long shaft 15-1. By controlling the rotation direction of the lifting motor 15, the rise or fall is further controlled. Furthermore, the lifting motor 15 drives the lifting pipe 13 and the protective pipe II 6 to move up and down to further adjust the oil pumping height;

[0062] Furthermore, the long shaft 15-1 of the lifting motor 15 is connected to the input shaft of the reducer 16 through a clamping device, and the reducer 16 enables the long shaft 15-1 to run at a constant speed;

[0063] Furthermore, the present application also includes an oil extraction pipe 36 for transporting oil. One end of the oil extraction pipe 36 is provided on the oil-water separation lifting device for extracting oil or water. The oil extraction port of the oil extraction pipe 36 is lifted by the lifting of the power device, and the other end is connected to the oil storage area 37.

[0064] Preferably, one end of the oil extraction pipe 36 is inserted and fixed from the circumference of the protective pipe II 6, and the other end is welded to the flange assembly 1 on the outer circumference of the protective pipe II 6, and is fixedly connected to another pipe through the flange assembly 1. The other end of the pipe is inserted into the oil storage area 37.

[0065] 4. Such as Figure 4 As shown, the assembled device is lowered into the tank from the construction port on the top of the tank, and the lower lifting pipe 3 is inserted into the space surrounded by four round steels 7. The flange I 14 is fixedly connected to the flange on the top of the construction port by bolts and nuts. Due to the function of the structural unit, the lower lifting pipe 3 can be used even if it is not concentric with the protective pipe II 6.

[0066] When the oil-water interface needs to be adjusted, the application also includes a liquid level sensor, which can be used to Figure 5 As shown, the method for calculating the oil-water interface is as follows:

[0067] b×ρ 水 =h×ρ 水 ×(Hh)×ρ 油

[0068]

[0069] a=Hb

[0070] Where, ID is the total inner diameter;

[0071] H is the total height of the liquid level;

[0072] h is the height of the water interface;

[0073] a is the set water height;

[0074] ρ 油 is the density of oil;

[0075] ρ 水 is the density of water;

[0076] b is the set oil height;

[0077] The oil-water interface can be controlled by adjusting the a value or b value.

[0078] When the oil-water interface becomes higher, that is, there is more water than oil, the original oil extraction height is oil, but now it is water, so the oil extraction port height needs to be raised. At this time, the lifting motor 15 drives the long shaft 15-1 to rotate left, and the long shaft 15-1 drives the flange II 25 and the copper nut 4 to rotate. Since the limit rod 24 cannot swing left and right in the limit hole 26, the copper nut 4 further rises on the long shaft 15-1 due to the rotation effect, and the copper nut 4 drives the lifting pipe 13 and the structural unit fixed at the lower part of the lifting pipe 13 to move upward, then the oil extraction height of the pumping pipe 36 becomes higher, until the oil extraction port of the pumping pipe 36 reaches the position of the oil layer, and the oil is pumped to the storage area 37 through the pump and the pumping pipe 36.

[0079] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0080] The above is a detailed description of an embodiment of the present invention. However, the content described is only a preferred embodiment of the present invention and should not be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. An oil-water separation and lifting device, characterized by: The invention comprises a power device for lifting the lower riser; the power device enables the riser to adjust the height of the oil-water interface by adjusting the height of the lower structural unit of the riser, wherein the structural unit is: The bottom of the lifting pipe is provided with a connecting section, and the front end of the connecting section is provided with a thread; the center of the hanging plate is provided with a large hole that passes through the hanging plate, and the hanging plate is fixed to the lifting pipe by screwing on the nut I; A plurality of round steels are fixed on the bottom surface of the hanging plate, and the protective pipe II is sleeved on the outer circumference surrounded by the plurality of round steels. The protective pipe II and the bottom of the round steel are fixedly connected to the flange assembly; the lower lifting pipe moves up and down within the inner circumference surrounded by the plurality of round steels.

2. The oil-water separation and lifting device according to claim 1, characterized in that: One end of the oil extraction pipe is arranged on the oil-water separation lifting device for extracting oil or water. The oil extraction port of the oil extraction pipe is lifted by the lifting of the power device, and the other end is connected to the oil storage area.

3. The oil-water separation and lifting device according to claim 2, characterized in that: It includes a support pipe, the top of which is provided with a power device for lifting the lower lifting pipe; The bottom of the lifting pipe is provided with a connecting section with a diameter smaller than that of the lifting pipe, the diameter of the large hole is larger than the outer diameter of the lifting pipe, the outer diameters of circular plate I and circular plate II are both larger than the outer diameters of the lifting pipe and the large hole, the diameter of the large hole is larger than the outer diameter of the connecting section, and the centers of circular plate I and circular plate II are provided with small holes matching the outer diameter of the connecting section. The circular plate I, hanging plate and circular plate II are sequentially sleeved on the connecting section and fixed to the lifting pipe by screwing on nut I.

4. The oil-water separation and lifting device according to claim 3, characterized in that: One end of the oil extraction pipe is inserted and fixed from the circumference of the protective pipe II, and the other end is fixedly connected to the flange assembly on the outer circumference of the protective pipe II, and is fixedly connected to another pipe through the flange assembly. The other end of the pipe is inserted into the oil storage area.

5. The oil-water separation and lifting device according to any one of claims 1 to 4, characterized in that: The power device is a lifting motor, which is fixed to the top surface of the support tube, and a thread is provided on the long shaft of the lifting motor; Flange II is passed through the long shaft, and the interior of the "convex"-shaped copper nut is connected to the long shaft through a thread. One end of the outer portion of the copper nut is fixedly connected to flange II. After flange II is passed through the riser, it is fixedly connected to the top surface of the riser. After the other end of the outer portion of the copper nut is clamped onto flange II and the riser, flange II and flange II are fixedly connected by bolts and nuts. A vertically long strip-shaped limiting hole is provided on the peripheral surface of the support tube, and a limiting rod is fixedly connected to one side of the flange II, and the limiting rod passes through the limiting hole.

6. The oil-water separation and lifting device according to claim 5, characterized in that: The long shaft of the lifting motor is connected to the input shaft of the reducer through a clamping device; The outer surfaces of the riser and round steel are polished; The number of the round steels is 4; The plug of the lifting pipe includes the connecting section, and the other end of the plug is inserted into the lifting pipe and fixedly connected to the lifting pipe.

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